阅读说明：本技术 一种便于移动的体育赛事用公示栏 (Sports event is with bulletin board convenient to remove ) 是由 徐仁乾 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种便于移动的体育赛事用公示栏,包括支撑架和设于所述支撑架上的框架部,所述支撑架底部设有底座,所述底座上底部设有第一活动槽,所述第一活动槽内设有万向轮,所述底座上设有用于推动所述万向轮从所述第一活动槽内移出的第一推板；所述支撑架侧壁上设有第二活动槽,所述第二活动槽内可转动连接有第一支撑板,当所述框架部相对于所述支撑架移动时,所述第一支撑板从所述第二活动槽内翻出；利用万向轮与地面接触的方式移动公示栏,仅单人推动即可移动公示栏,使公示栏的移动更加方便。(The invention discloses a conveniently-movable bulletin board for sports events, which comprises a support frame and a frame part arranged on the support frame, wherein the bottom of the support frame is provided with a base, the bottom of the base is provided with a first movable groove, a universal wheel is arranged in the first movable groove, and the base is provided with a first push plate for pushing the universal wheel to move out of the first movable groove; a second movable groove is formed in the side wall of the support frame, a first support plate is rotatably connected in the second movable groove, and when the frame part moves relative to the support frame, the first support plate is turned out of the second movable groove; the bulletin board is moved by the contact of the universal wheels and the ground, and can be moved only by pushing of a single person, so that the bulletin board is more convenient to move.)

1. The utility model provides a sports event is with bulletin board convenient to remove, includes support frame (1) and locates frame portion (2) on support frame (1), its characterized in that: a base (11) is arranged at the bottom of the support frame (1), a first movable groove is arranged at the upper bottom of the base (11), a universal wheel (1132) is arranged in the first movable groove, and a first push plate (111) used for pushing the universal wheel (1132) to move out of the first movable groove is arranged on the base (11); the side wall of the support frame (1) is provided with a second movable groove, a first support plate (12) is rotatably connected in the second movable groove, and when the frame part (2) moves relative to the support frame (1), the first support plate (12) is turned out from the second movable groove.

2. A portable sports event bulletin board of claim 1, wherein: a third movable groove is formed in the side wall of the support frame (1), a first connecting rod (3) is arranged in the third movable groove, a first connecting groove is formed in the first connecting rod (3), a first connecting block (22) corresponding to the first connecting groove is arranged on the side wall of the frame portion (2), and a plurality of first reset springs are arranged on the inner wall of the first connecting groove; a fourth movable groove is formed in the inner wall of the third movable groove, a supporting block (110) is arranged in the fourth movable groove, and when the first connecting block (22) moves in the first connecting groove, the supporting block (110) enters the fourth movable groove.

3. A portable sports event bulletin board of claim 2, wherein: a fifth movable groove is formed in the inner wall of the second movable groove, a friction plate (150) matched with the first supporting plate (12) is arranged in the fifth movable groove, a second connecting rod (1501) is arranged on the friction plate (150), a first cavity is formed in the inner wall of the fifth movable groove, the second connecting rod (1501) penetrates through the first cavity, and a second push plate (1502) is arranged at one end of the second connecting rod (1501); a seventh movable groove communicated with the first cavity is arranged on the inner wall of the second movable groove, a first connecting spring (131) is arranged in the seventh movable groove, and a first push block (13) is arranged at one end of the first connecting spring (131); an eighth movable groove is further formed in the inner wall of the second movable groove, a second connecting spring (141) is arranged in the eighth movable groove, and a fixed block (14) is arranged at one end of the second connecting spring (141); when the first connecting block (22) moves in the first connecting groove, the second push plate (1502) moves towards the first cavity.

4. A portable sports event bulletin board of claim 3, wherein: a ninth movable groove is arranged at the top of the fifth movable groove, a third connecting spring (1601) is arranged in the ninth movable groove, a first limiting block (160) is arranged at the bottom end of the third connecting spring (1601), and a first inclined plane is arranged on the side wall of the first limiting block (160); first cavity top is equipped with first movable chamber, be equipped with first connecting plate (1503) on friction plate (150), first connecting plate (1503) wear to locate first movable intracavity, first movable intracavity is equipped with fly leaf (18), be equipped with second connecting block (182) on fly leaf (18), be equipped with fourth connecting spring (183) on second connecting block (182), fourth connecting spring (183) one end is equipped with first movable block (184), be equipped with sand grip (1841) on first movable block (184), first connecting plate (1503) bottom be equipped with sand grip (1841) matched with recess.

5. A portable sports event bulletin board of claim 4, wherein: a tenth movable groove is formed in the movable plate (18), a third connecting rod (1881) is arranged in the tenth movable groove, a fifth connecting spring (1882) is arranged at the bottom of the third connecting rod (1881), a limiting rod (188) is arranged at the top of the third connecting rod (1881), and a first through groove matched with the limiting rod (188) is formed in the first movable block (184); a third connecting block (181) is arranged on the side wall of the movable plate (18), an eleventh movable groove matched with the third connecting block (181) is arranged on the inner wall of the first movable cavity, a twelfth movable groove is arranged on the third connecting block (181), a fourth connecting rod (187) penetrates through the twelfth movable groove, and a sixth connecting spring (1873) is arranged at the bottom of the fourth connecting rod (187); and a first connecting cavity communicated with the twelfth movable groove is arranged on the side wall of the tenth movable groove, and a second connecting plate (1883) connected with the fourth connecting rod (187) is arranged on the third connecting rod (1881).

6. A portable sports event bulletin board of claim 5, wherein: a first sliding block (1842) is arranged at the bottom of the first movable block (184), a first sliding groove matched with the first sliding block (1842) is arranged on the movable plate (18), a connecting pipe (185) is arranged in the first sliding groove, and a third push plate (1851) penetrates through the connecting pipe (185); a second connecting cavity communicated with the connecting pipe (185) is arranged on the side wall of the tenth movable groove; a second cavity is arranged on the fourth connecting rod ((187)), a second supporting plate (1811) is arranged on the inner wall of the twelfth movable groove, an air transmission cavity communicated with the second cavity is arranged on the second supporting plate (1811), and the air transmission cavity is communicated with the tenth movable groove.

7. A portable sports event bulletin board of claim 6, wherein: a through cavity is formed in the top of the second cavity, a first push rod (1871) penetrates through the through cavity, a third push plate (1874) is arranged at the bottom end of the first push rod (1871), a support spring (1872) is arranged at the bottom of the third push plate (1874), a second through groove is formed in the third push plate (1874), a sealing plate (1876) is rotatably connected to the inner wall of the second through groove, a fourth connecting block (1875) is further arranged on the inner wall of the second through groove, and an air inlet corresponding to the second through groove is formed in the top of the second cavity; a gas outlet is formed in the side wall of the tenth movable groove, a second movable cavity is formed in the inner wall of the gas outlet, a baffle plate (1863) is arranged in the second movable cavity, a third movable cavity is formed in the side wall of the second movable cavity, a third connecting plate (186) is arranged on the side wall of the baffle plate (1863), and a seventh connecting spring (1861) is arranged on the side wall of the third connecting plate (186); a thirteenth movable groove is formed in the top of the third movable cavity, a first bump (1862) is formed in the top of the third connecting plate (186), and the first bump (1862) penetrates through the first sliding groove; and a second sliding block (1884) is arranged on the second connecting plate (1883), and a second sliding groove matched with the second sliding block (1884) is arranged on the side wall of the fourth connecting rod (187).

8. A portable sports event bulletin board of claim 5, wherein: the novel movable groove is characterized in that a fourteenth movable groove is formed in the inner wall of the third movable groove, a first movable rod (15) is arranged in the fourteenth movable groove, a fifteenth movable groove is formed in the bottom of the first movable rod (15), two groups of driving wheels (153) are arranged in the fifteenth movable groove, synchronous belts (154) are wound on the two groups of driving wheels (153), a fifth connecting block and a sixth connecting block (156) are arranged on the synchronous belts (154), the fifth connecting block is fixedly connected to the inner wall of the fourteenth movable groove, a seventh connecting block (155) is arranged on the sixth connecting block (156), a first connecting rope and a second connecting rope are arranged on the seventh connecting block (155), one end of the first connecting rope is fixedly connected to the first limiting block (160), and one end of the second connecting rope is fixedly connected to the top of the fourth connecting rod (187).

9. A portable sports event bulletin board of claim 8, wherein: a sixteenth movable groove is formed in the inner wall of the fourteenth movable groove, a second movable block (16) is arranged in the sixteenth movable groove, a fifth connecting rod (161) is arranged at the bottom of the second movable block (16), a fifth movable cavity is formed in the support frame (1), the fifth connecting rod (161) penetrates through the fifth movable cavity, a fourth connecting plate (162) is arranged at the bottom of the fifth connecting rod (161), a second reset spring (164) is arranged at the bottom of the fourth connecting plate (162), a third through groove communicated with the eleventh movable groove is formed at the bottom of the fifth movable cavity, and a second push rod (163) matched with the third through groove is arranged at the bottom of the fourth connecting plate (162); a seventeenth movable groove is formed in the first movable rod (15), a second movable rod (151) is arranged in the seventeenth movable groove, an eighteenth movable groove is formed in the side wall of the seventeenth movable groove, a third push rod (1511) is arranged on the second movable rod (151), the third push rod (1511) is arranged in the eighteenth movable groove in a penetrating mode, and the third push rod (1511) is arranged at the top of the second movable block (16); the side wall of the first connecting block (22) is rotatably connected with a second pushing block (221).

10. A portable sports event bulletin board of claim 3, wherein: a sixth movable cavity is formed in the inner wall of the third movable groove, a fifth connecting plate (140) is arranged on the side wall of the sixth movable cavity, a third connecting rope is arranged on the fifth connecting plate (140), one end of the third connecting rope is fixedly connected to the fixed block (14), a second bump (1401) is arranged on the fifth connecting plate (140), the second bump (1401) is made of rubber, a nineteenth movable groove is formed in the side wall of the sixth movable cavity, and the second bump (1401) penetrates out of the nineteenth movable groove; a fourth connecting rope is arranged on the frame part (2), and one end of the fourth connecting rope is fixedly connected to the first supporting plate (12); the bottom of the first connecting rod (3) is provided with a buffer spring (31), the bottom of the buffer spring (31) is provided with a buffer plate (32), and the bottom of the buffer plate (32) is provided with a buffer cushion.

Technical Field

The invention belongs to the technical field of bulletin boards, and particularly relates to a bulletin board convenient to move for sports events.

Background

The bulletin board is a display article which is placed in a place with a large popularity and used for posting suggestive contents such as bulletin documents, bulletins, and revelations. And the sports event bulletin board is a display article specifically used for showing the results of a sports event. The sports event bulletin board needs to be transported among a plurality of different places of origin according to actual requirements, the situation that the bulletin board is moved outdoors is common, and the bottoms of two supports of the existing bulletin board are generally provided with counterweight bases to ensure the stability of the bulletin board, but the bulletin board is very inconvenient to transport; when the bulletin board is carried to outdoor use, when the crowd of strong wind weather or gathering promotes the bulletin board, the bulletin board takes place whole and emptys easily, directly finds the damage that causes the bulletin board, causes the potential safety hazard simultaneously easily.

Disclosure of Invention

The invention provides a conveniently-moving bulletin board for sports events, aiming at overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a conveniently-moved bulletin board for sports events comprises a support frame and a frame part arranged on the support frame, wherein a base is arranged at the bottom of the support frame, a first movable groove is formed in the bottom of the base, universal wheels are arranged in the first movable groove, and a first push plate used for pushing the universal wheels to move out of the first movable groove is arranged on the base; a second movable groove is formed in the side wall of the support frame, a first support plate is rotatably connected in the second movable groove, and when the frame part moves relative to the support frame, the first support plate is turned out of the second movable groove; when the bulletin board is used, the universal wheels are positioned in the first movable groove, and the bottom surface of the base is in contact with the ground, so that the use stability of the bulletin board is ensured; when the bulletin board needs to be moved, the universal wheels are turned out from the first movable grooves, the bulletin board is moved by the mode that the universal wheels are in contact with the ground, and the bulletin board can be moved only by pushing of a single person, so that the bulletin board is more convenient to move; when the utility model discloses a public notice fence uses and receives the impact, because the frame part is main stress surface, the frame part removes for the support frame, and first backup pad is turned out from the second activity inslot, and first backup pad increases the base area, prevents that whole public notice fence from empting, avoids public notice fence directly to pound the subaerial damage, increases the security that public notice fence used.

A third movable groove is formed in the side wall of the support frame, a first connecting rod is arranged in the third movable groove, a first connecting groove is formed in the first connecting rod, a first connecting block corresponding to the first connecting groove is arranged on the side wall of the frame portion, and a plurality of first reset springs are arranged on the inner wall of the first connecting groove; and a fourth movable groove is formed in the inner wall of the third movable groove, a supporting block is arranged in the fourth movable groove, and when the first connecting block moves in the first connecting groove, the supporting block enters the fourth movable groove.

A fifth movable groove is formed in the inner wall of the second movable groove, a friction plate matched with the first supporting plate is arranged in the fifth movable groove, a second connecting rod is arranged on the friction plate, a first cavity is formed in the inner wall of the fifth movable groove, the second connecting rod penetrates through the first cavity, and a second push plate is arranged at one end of the second connecting rod; a seventh movable groove communicated with the first cavity is formed in the inner wall of the second movable groove, a first connecting spring is arranged in the seventh movable groove, and a first push block is arranged at one end of the first connecting spring; an eighth movable groove is further formed in the inner wall of the second movable groove, a second connecting spring is arranged in the eighth movable groove, and a fixed block is arranged at one end of the second connecting spring; when the first connecting block moves in the first connecting groove, the second push plate moves towards the first cavity.

A ninth movable groove is formed in the top of the fifth movable groove, a third connecting spring is arranged in the ninth movable groove, a first limiting block is arranged at the bottom end of the third connecting spring, and a first inclined plane is arranged on the side wall of the first limiting block; the improved structure of the automobile seat is characterized in that a first movable cavity is arranged above the first cavity, a first connecting plate is arranged on the friction plate, the first connecting plate is arranged in the first movable cavity in a penetrating mode, a movable plate is arranged in the first movable cavity, a second connecting block is arranged on the movable plate, a fourth connecting spring is arranged on the second connecting block, one end of the fourth connecting spring is provided with a first movable block, a convex strip is arranged on the first movable block, and a groove matched with the convex strip is formed in the bottom of the first connecting plate.

A tenth movable groove is formed in the movable plate, a third connecting rod is arranged in the tenth movable groove, a fifth connecting spring is arranged at the bottom of the third connecting rod, a limiting rod is arranged at the top of the third connecting rod, and a first through groove matched with the limiting rod is formed in the first movable block; a third connecting block is arranged on the side wall of the movable plate, an eleventh movable groove matched with the third connecting block is arranged on the inner wall of the first movable cavity, a twelfth movable groove is arranged on the third connecting block, a fourth connecting rod penetrates through the twelfth movable groove, and a sixth connecting spring is arranged at the bottom of the fourth connecting rod; and a first connecting cavity communicated with the twelfth movable groove is formed in the side wall of the tenth movable groove, and a second connecting plate connected with the fourth connecting rod is arranged on the third connecting rod.

A first sliding block is arranged at the bottom of the first movable block, a first sliding groove matched with the first sliding block is arranged on the movable plate, a connecting pipe is arranged in the first sliding groove, and a third push plate penetrates through the connecting pipe; a second connecting cavity communicated with the connecting pipe is arranged on the side wall of the tenth movable groove; a second cavity is formed in the fourth connecting rod, a second supporting plate is arranged on the inner wall of the twelfth movable groove, an air conveying cavity communicated with the second cavity is formed in the second supporting plate, and the air conveying cavity is communicated with the tenth movable groove.

A through cavity is formed in the top of the second cavity, a first push rod penetrates through the through cavity, a third push plate is arranged at the bottom end of the first push rod, a supporting spring is arranged at the bottom of the third push plate, a second through groove is formed in the third push plate, a sealing plate is rotatably connected to the inner wall of the second through groove, a fourth connecting block is further arranged on the inner wall of the second through groove, and an air inlet corresponding to the second through groove is formed in the top of the second cavity; a gas outlet is formed in the side wall of the tenth movable groove, a second movable cavity is formed in the inner wall of the gas outlet, a baffle is arranged in the second movable cavity, a third movable cavity is formed in the side wall of the second movable cavity, a third connecting plate is arranged on the side wall of the baffle, and a seventh connecting spring is arranged on the side wall of the third connecting plate; a thirteenth movable groove is formed in the top of the third movable cavity, a first bump is arranged on the top of the third connecting plate, and the first bump penetrates through the first sliding groove; and a second sliding block is arranged on the second connecting plate, and a second sliding groove matched with the second sliding block is arranged on the side wall of the fourth connecting rod.

The novel movable groove is characterized in that a fourteenth movable groove is formed in the inner wall of the third movable groove, a first movable rod is arranged in the fourteenth movable groove, a fifteenth movable groove is formed in the bottom of the first movable rod, two groups of driving wheels are arranged in the fifteenth movable groove, synchronous belts are arranged on the two groups of driving wheels in a winding mode, a fifth connecting block and a sixth connecting block are arranged on the synchronous belts, the fifth connecting block is fixedly connected to the inner wall of the fourteenth movable groove, a seventh connecting block is arranged on the sixth connecting block, a first connecting rope and a second connecting rope are arranged on the seventh connecting block, one end of the first connecting rope is fixedly connected to the first limiting block, and one end of the second connecting rope is fixedly connected to the top of the fourth connecting rod.

A sixteenth movable groove is formed in the inner wall of the fourteenth movable groove, a second movable block is arranged in the sixteenth movable groove, a fifth connecting rod is arranged at the bottom of the second movable block, a fifth movable cavity is formed in the supporting frame, the fifth connecting rod penetrates through the fifth movable cavity, a fourth connecting plate is arranged at the bottom of the fifth connecting rod, a second reset spring is arranged at the bottom of the fourth connecting plate, a third through groove communicated with the eleventh movable groove is formed in the bottom of the fifth movable cavity, and a second push rod matched with the third through groove is arranged at the bottom of the fourth connecting plate; a seventeenth movable groove is formed in the first movable rod, a second movable rod is arranged in the seventeenth movable groove, an eighteenth movable groove is formed in the side wall of the seventeenth movable groove, a third push rod is arranged on the second movable rod and penetrates through the eighteenth movable groove, and the third push rod is arranged at the top of the second movable block; and a second push block is rotatably connected to the side wall of the first connecting block.

A sixth movable cavity is formed in the inner wall of the third movable groove, a fifth connecting plate is arranged on the side wall of the sixth movable cavity, a third connecting rope is arranged on the fifth connecting plate, one end of the third connecting rope is fixedly connected to the fixed block, a second convex block is arranged on the fifth connecting plate and made of rubber, a nineteenth movable groove is formed in the side wall of the sixth movable cavity, and the second convex block penetrates out of the nineteenth movable groove; a fourth connecting rope is arranged on the frame part, and one end of the fourth connecting rope is fixedly connected to the first supporting plate; the bottom of the first connecting rod is provided with a buffer spring, the bottom of the buffer spring is provided with a buffer plate, and the bottom of the buffer plate is provided with a buffer cushion.

The invention has the following advantages: the bulletin board is moved by using a mode that the universal wheels are contacted with the ground, and can be moved only by being pushed by a single person, so that the bulletin board is more convenient to move; when the utility model discloses a public notice fence uses and receives the impact, because the frame part is main stress surface, the frame part removes for the support frame, and first backup pad is turned out from the second activity inslot, and first backup pad increases the base area, prevents that whole public notice fence from empting, avoids public notice fence directly to pound the subaerial damage, increases the security that public notice fence used.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a cross-sectional view taken along a-a in fig. 2.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view of fig. 3 at B.

Fig. 6 is a cross-sectional view taken along line B-B of fig. 2.

Fig. 7 is an enlarged view of fig. 6 at C.

Fig. 8 is an enlarged view of fig. 6 at D.

Fig. 9 is an enlarged view of fig. 8 at E.

Fig. 10 is a cross-sectional view taken along line C-C of fig. 2.

Fig. 11 is an enlarged view of fig. 10 at F.

Fig. 12 is an enlarged view at G in fig. 11.

Fig. 13 is a cross-sectional view taken along line D-D in fig. 2.

Fig. 14 is an enlarged view of fig. 13 at H.

Fig. 15 is an enlarged view at I in fig. 14.

Fig. 16 is a cross-sectional view taken along line E-E of fig. 2.

Fig. 17 is an enlarged view at J in fig. 16.

Fig. 18 is an enlarged view at K in fig. 17.

Fig. 19 is a right side view of the present invention.

Fig. 20 is a cross-sectional view taken along F-F in fig. 19.

Fig. 21 is an enlarged view at L in fig. 20.

Fig. 22 is an enlarged view of fig. 20 at M.

Fig. 23 is an enlarged view of fig. 20 at N.

Fig. 24 is an enlarged view at O in fig. 20.

Fig. 25 is an enlarged view at P in fig. 22.

Fig. 26 is a cross-sectional view taken along G-G in fig. 19.

Fig. 27 is an enlarged view at Q in fig. 26.

Fig. 28 is an enlarged view of fig. 26 at R.

Fig. 29 is an enlarged view of fig. 27 at S.

Fig. 30 is an enlarged view at T in fig. 27.

Fig. 31 is a cross-sectional view taken along H-H in fig. 19.

Fig. 32 is an enlarged view of fig. 31 at U.

Fig. 33 is a cross-sectional view taken along line I-I of fig. 19.

Fig. 34 is an enlarged view at V in fig. 33.

Fig. 35 is an enlarged view at W in fig. 34.

Fig. 36 is an enlarged view at X in fig. 34.

Fig. 37 is an enlarged view at Y in fig. 34.

Fig. 38 is a cross-sectional view taken along J-J in fig. 19.

Fig. 39 is an enlarged view at Z in fig. 38.

Fig. 40 is an enlarged view of a portion in fig. 39.

Fig. 41 is an enlarged view of fig. 39 at b.

Detailed Description

As shown in fig. 1 to 41, a portable bulletin board for sporting events comprises a supporting frame 1 and a frame portion 2 disposed on the supporting frame 1, wherein a base 11 is disposed at the bottom of the supporting frame 1, a first movable groove is disposed at the bottom of the base 11, a universal wheel 1132 is disposed in the first movable groove, and a first push plate 111 for pushing the universal wheel 1132 to move out of the first movable groove is disposed on the base 11; a second movable groove is formed in the side wall of the support frame 1, a first support plate 12 is rotatably connected in the second movable groove, and when the frame part 2 moves relative to the support frame 1, the first support plate 12 is turned out of the second movable groove; when the bulletin board is used, the universal wheels are positioned in the first movable groove, and the bottom surface of the base is in contact with the ground, so that the use stability of the bulletin board is ensured; when the bulletin board needs to be moved, the universal wheels are turned out from the first movable grooves, the bulletin board is moved by the mode that the universal wheels are in contact with the ground, and the bulletin board can be moved only by pushing of a single person, so that the bulletin board is more convenient to move; when the utility model discloses a public notice fence uses and receives the impact, because the frame part is main stress surface, the frame part removes for the support frame, and first backup pad is turned out from the second activity inslot, and first backup pad increases the base area, prevents that whole public notice fence from empting, avoids public notice fence directly to pound the subaerial damage, increases the security that public notice fence used.

As shown in fig. 22 and 25, a third movable groove is formed in a side wall of the support frame 1, a first connecting rod 3 is arranged in the third movable groove, a first connecting groove is formed in the first connecting rod 3, a first connecting block 22 corresponding to the first connecting groove is arranged on a side wall of the frame portion 2, and a plurality of first return springs are arranged on an inner wall of the first connecting groove; a fourth movable groove is formed in the inner wall of the third movable groove, a supporting block 110 is arranged in the fourth movable groove, and when the first connecting block 22 moves in the first connecting groove, the supporting block 110 enters the fourth movable groove; the inner walls of two sides of the first connecting groove are respectively provided with a first return spring, the first connecting block is positioned in the middle of the first connecting groove under the arrangement of the first return springs, the supporting block provides supporting force for the frame part, and the first connecting rod is fixed at the top of the third movable groove; when the frame part moves relative to the support frame under the action of impact force, the support blocks enter the fourth movable groove, the bottoms of the first connecting rods fall down after losing the supporting force, the first connecting rods move to the bottom of the third movable groove and drive the frame part to move together, the frame part moves to the bottom of the support frame to move the center of gravity of the whole bulletin board down, the first support plate is turned out of the second movable groove, and the downward movement of the frame part is matched with the first support plate to prevent the bulletin board from further falling; if the impact force is not large, the support frame is still in a vertical state; if the impact force is great, the base, the bottom surface and the first supporting plate form a triangular structure to support the bulletin board, at the moment, the frame part is also positioned at the bottom of the supporting frame, the bulletin board cannot be further toppled, and the frame part is prevented from being directly smashed on the ground and damaged.

As shown in fig. 4, 5 and 39, a fifth movable groove is formed on the inner wall of the second movable groove, a friction plate 150 which is matched with the first support plate 12 is arranged in the fifth movable groove, a second connecting rod 1501 is arranged on the friction plate 150, a first cavity is formed on the inner wall of the fifth movable groove, the second connecting rod 1501 is arranged in the first cavity in a penetrating manner, and a second push plate 1502 is arranged at one end of the second connecting rod 1501; a seventh movable groove communicated with the first cavity is arranged on the inner wall of the second movable groove, a first connecting spring 131 is arranged in the seventh movable groove, and a first push block 13 is arranged at one end of the first connecting spring 131; an eighth movable groove is further formed in the inner wall of the second movable groove, a second connecting spring 141 is arranged in the eighth movable groove, and a fixed block 14 is arranged at one end of the second connecting spring 141; when the first connecting block 22 moves in the first connecting groove, the second pushing plate 1502 moves into the first cavity; when the first supporting plate is turned into the second movable groove, the fixed block is positioned in the eighth movable groove, the first supporting plate pushes the first push block to move towards the seventh movable groove, the first push block pushes air in the seventh movable groove to enter the first cavity, the second push plate moves in the first cavity, the friction plate moves towards the first supporting plate, the friction plate is contacted with the side wall of the first supporting plate, and the first supporting plate is fixed in the second movable groove; when the frame part moves relative to the support frame, the friction plate moves towards the fifth movable groove, the second push plate moves towards the first cavity to push air in the first cavity into the seventh movable groove, and meanwhile, the first connecting spring pushes the first push block to move towards the outer side of the seventh movable groove, so that the first push block generates large thrust on the first support plate under the dual actions of air pressure and the spring, and accordingly large acceleration is formed on the first push plate, the first support plate is quickly turned out of the second movable groove, the first support plate is used for providing auxiliary support force for the support frame, and the public fence is prevented from toppling; after the first supporting plate is turned out from the second movable groove, the fixed block extends out from the eighth movable groove, and the first supporting plate is clamped between the inner wall of the second movable groove and the fixed block, so that the first supporting plate is ensured to provide reliable supporting force for the supporting frame, and the bulletin board is protected; the second push plate is provided with no spring, so that the first push block can be easily pushed to move when the first support plate is turned into the second movable groove; the second push pedal can be automatic move toward first cavity one end, utilize atmospheric pressure and first connecting spring to mutually support and promote first ejector pad jointly and remove, make first ejector pad instantaneously obtain great power to quick release first backup pad from the second activity inslot, timely for the bulletin board provides the holding power, avoid the bulletin board to further empty.

As shown in fig. 40 and 41, a ninth movable groove is disposed at the top of the fifth movable groove, a third connecting spring 1601 is disposed in the ninth movable groove, a first limiting block 160 is disposed at the bottom end of the third connecting spring 1601, and a first inclined plane is disposed on the side wall of the first limiting block 160; a first movable cavity is arranged above the first cavity, a first connecting plate 1503 is arranged on the friction plate 150, the first connecting plate 1503 penetrates through the first movable cavity, a movable plate 18 is arranged in the first movable cavity, a second connecting block 182 is arranged on the movable plate 18, a fourth connecting spring 183 is arranged on the second connecting block 182, a first movable block 184 is arranged at one end of the fourth connecting spring 183, a convex strip 1841 is arranged on the first movable block 184, and a groove matched with the convex strip 1841 is arranged at the bottom of the first connecting plate 1503; when the first supporting plate is positioned in the second movable groove, the movable plate is positioned at the bottom of the first movable cavity; when the frame part moves relative to the support frame, the movable plate moves upwards, the first movable block moves to the bottom of the first connecting plate, the convex strip is inserted into the groove, the first movable block is connected with the first connecting plate, when the fourth connecting spring pulls the first movable block to move back, the first movable block drives the first connecting plate to move together, the friction plate moves along with the first connecting plate, the friction plate is separated from the first support plate, the fourth connecting spring provides power for the movement of the second push plate, the second push plate spontaneously pushes the air in the first cavity to enter the seventh movable groove, the air is matched with the first connecting spring to push the first push block to move, the overturning speed of the first support plate is increased, and the first support plate is rapidly overturned out; when turning into the second activity inslot with first backup pad, the fly leaf is in first activity chamber bottom, and fourth connecting spring does not contact with first connecting plate, reduces the power that first backup pad promoted first ejector pad, changes and pushes first backup pad into second activity inslot, reduces first backup pad degree of difficulty that resets.

As shown in fig. 12 and 37, a tenth movable groove is formed in the movable plate 18, a third connecting rod 1881 is disposed in the tenth movable groove, a fifth connecting spring 1882 is disposed at the bottom of the third connecting rod 1881, a limiting rod 188 is disposed at the top of the third connecting rod 1881, and a first through groove matched with the limiting rod 188 is formed in the first movable block 184; a third connecting block 181 is arranged on the side wall of the movable plate 18, an eleventh movable groove matched with the third connecting block 181 is arranged on the inner wall of the first movable cavity, a twelfth movable groove is arranged on the third connecting block 181, a fourth connecting rod 187 is arranged in the twelfth movable groove in a penetrating manner, and a sixth connecting spring 1873 is arranged at the bottom of the fourth connecting rod 187; a first connecting cavity communicated with the twelfth movable groove is formed in the side wall of the tenth movable groove, and a second connecting plate 1883 connected with the fourth connecting rod 187 is arranged on the third connecting rod 1881; when the first movable block moves to one end far away from the second connecting block, the limiting rod is staggered with the first through groove, the limiting rod abuts against the side wall of the first movable block, and the first movable block is fixed by the limiting rod, so that the fourth connecting spring is in a stretching state; when the frame part moves relative to the supporting frame, the fourth connecting rod drives the movable plate to move upwards, the raised lines are embedded into the grooves, the movable plate cannot continue to move upwards, the fourth connecting rod moves upwards relative to the movable plate, the fourth connecting rod drives the second connecting plate to move, the third connecting rod moves together with the second connecting plate, the limiting rod rises to the position aligned with the first through groove, the fourth connecting spring pulls the first movable block to move towards the direction of the second connecting block, the first movable block drives the friction plate to move, the first supporting plate is enabled to be rapidly turned out from the second movable groove, and a supporting effect is achieved for the bulletin board.

As shown in fig. 30 and 41, a first sliding block 1842 is disposed at the bottom of the first movable block 184, a first sliding slot matched with the first sliding block 1842 is disposed on the movable plate 18, a connecting pipe 185 is disposed in the first sliding slot, and a third push plate 1851 is disposed in the connecting pipe 185; a second connecting cavity communicated with the connecting pipe 185 is arranged on the side wall of the tenth movable groove; a second cavity is formed in the fourth connecting rod 187, a second supporting plate 1811 is arranged on the inner wall of the twelfth movable groove, an air conveying cavity communicated with the second cavity is formed in the second supporting plate 1811, and the air conveying cavity is communicated with the tenth movable groove; after the first movable block drives the friction plate to move, the fourth connecting rod drives the movable plate to move downwards, and the first connecting block is disengaged from the first connecting plate; after the movable plate moves to the bottom of the first movable cavity, the fourth connecting rod is located at the top of the second supporting plate, air in the second cavity enters the tenth movable groove through the air transmission cavity, the air pressure pushes the third connecting rod to move upwards, the third connecting rod is staggered with the second connecting cavity, the air entering the tenth movable groove enters the connecting pipe from the second connecting cavity, the air pressure in the connecting pipe is increased, the third push plate is pushed to move, the third push plate pushes the first sliding block to move in the first sliding groove, the first movable block is far away from the second connecting block to move, the first movable block is moved to one end of the movable plate again, the third connecting rod is in a rising state, the limiting rod and the first through groove are in an aligned state, the first movable block is smoothly moved to one end of the movable plate, and position adjustment of the first movable block is completed.

As shown in fig. 18, 36 and 41, a through cavity is arranged at the top of the second cavity, a first push rod 1871 penetrates through the through cavity, a third push plate 1874 is arranged at the bottom end of the first push rod 1871, a support spring 1872 is arranged at the bottom of the third push plate 1874, a second through groove is arranged on the third push plate 1874, a sealing plate 1876 is rotatably connected to the inner wall of the second through groove, a fourth connecting block 1875 is further arranged on the inner wall of the second through groove, and an air inlet corresponding to the second through groove is arranged at the top of the second cavity; a gas outlet is formed in the side wall of the tenth movable groove, a second movable cavity is formed in the inner wall of the gas outlet, a baffle 1863 is arranged in the second movable cavity, a third movable cavity is formed in the side wall of the second movable cavity, a third connecting plate 186 is arranged on the side wall of the baffle 1863, and a seventh connecting spring 1861 is arranged on the side wall of the third connecting plate 186; a thirteenth movable groove is formed in the top of the third movable cavity, a first bump 1862 is formed in the top of the third connecting plate 186, and the first bump 1862 penetrates through the first sliding groove; a second sliding block 1884 is arranged on the second connecting plate 1883, and a second sliding groove matched with the second sliding block 1884 is arranged on the side wall of the fourth connecting rod 187; when the frame part moves downwards along with the first connecting rod, the second supporting plate provides supporting force for the fourth connecting rod, the first push rod moves downwards relative to the fourth connecting rod, the first push rod drives the third push plate to move downwards, the sealing plate abuts against the fourth connecting rod when the third push plate moves downwards, the second through groove is sealed by the sealing plate, so that the third push plate extrudes airflow in the second cavity when descending, the airflow in the second cavity is pushed into the air delivery cavity, the airflow enters the tenth movable groove through the air delivery cavity, the air outlet is sealed by the baffle at the position of the air outlet, the airflow enters the connecting pipe from the second connecting cavity after the third connecting rod is lifted, the second push plate pushes the first movable block to move, and the resetting of the first movable block is completed; the first movable block drives the first sliding block to move when moving, when the first movable block moves to one end of the movable plate, the first sliding block pushes the first lug to move, the first lug drives the third connecting plate to move, the baffle plate moves away from the air outlet to open the air outlet, air flow in the tenth movable groove flows out of the air outlet, after air pressure in the tenth movable groove is reduced, the fifth connecting spring pulls the third connecting rod to move downwards to enable the limiting rod to automatically descend, the limiting rod is staggered with the first through groove, so that the first movable block is automatically fixed after moving to one end of the movable plate, the fourth connecting spring is prevented from pulling the first movable block to move, the fourth connecting spring is in a stretching state, and the friction plate is driven to move by the first movable block after the movable plate ascends; the second connecting plate is connected with the fourth connecting rod through a second sliding block, so that the third connecting rod can move relative to the fourth connecting rod, and the third connecting rod is pushed to normally rise when ventilation is performed in the tenth movable groove; after the first movable block is fixed, the supporting spring pushes the third push plate to move upwards, the sealing plate overturns downwards, the air flow enters the second cavity from the air inlet to supplement the air in the second cavity, so that the third push plate can continuously push the air flow into the tenth movable groove when descending, and power is provided for the movement of the first movable block.

As shown in fig. 8 and 9, a fourteenth movable groove is formed in the inner wall of the third movable groove, a first movable rod 15 is arranged in the fourteenth movable groove, a fifteenth movable groove is formed in the bottom of the first movable rod 15, two sets of driving wheels 153 are arranged in the fifteenth movable groove, a synchronous belt 154 is wound on the two sets of driving wheels 153, a fifth connecting block and a sixth connecting block 156 are arranged on the synchronous belt 154, the fifth connecting block is fixedly connected to the inner wall of the fourteenth movable groove, a seventh connecting block 155 is arranged on the sixth connecting block 156, a first connecting rope and a second connecting rope are arranged on the seventh connecting block 155, one end of the first connecting rope is fixedly connected to the first limiting block 160, and one end of the second connecting rope is fixedly connected to the top of the fourth connecting rod 187; a twentieth movable groove is formed in the side wall of the first connecting groove, and the first connecting block is of a T-shaped structure; when the frame part moves relative to the support frame, the first connecting block moves in the third movable groove, the first connecting block moves out of the twentieth movable groove to push the first movable rod to move, when the first movable rod moves in the fourteenth movable groove, the fifth connecting block is fixed on the inner wall of the fourteenth movable groove, so that the first movable rod can drive the synchronous belt to rotate when moving, the seventh connecting block is driven to move when the synchronous belt rotates, the seventh connecting block pulls the first connecting rope to move on the second connecting rope, and the movement of the seventh connecting block is increased through the arrangement of the synchronous belt, so that the first connecting rope and the second connecting rope move for a longer distance; when the second connecting rope pulls the fourth connecting rod to move upwards, the first connecting rope is still in a loose state, and the second connecting rope provides power for the movement of the fourth connecting rod and the movable plate; after the movable plate moves to the bottom of the first connecting plate, the convex strips are embedded into the grooves, the movable plate cannot continue to move upwards, the fourth connecting rod moves upwards relative to the movable plate, the first limiting block is pulled to move upwards by the first connecting rope at the moment, the first limiting block enters the ninth movable groove, the limiting rod moves to the position state aligned with the first through groove, the fourth connecting spring pulls the first movable block to move back, the first movable block drives the first connecting plate to move, the friction plate is disengaged from the first supporting plate, the first supporting plate is pushed out by the first pushing block, and the overall toppling of the bulletin board is avoided.

As shown in fig. 8 and 27, a sixteenth movable groove is formed in the inner wall of the fourteenth movable groove, a second movable block 16 is arranged in the sixteenth movable groove, a fifth connecting rod 161 is arranged at the bottom of the second movable block 16, a fifth movable cavity is formed in the support frame 1, the fifth connecting rod 161 is inserted into the fifth movable cavity, a fourth connecting plate 162 is arranged at the bottom of the fifth connecting rod 161, a second return spring 164 is arranged at the bottom of the fourth connecting plate 162, a third through groove communicated with the eleventh movable groove is arranged at the bottom of the fifth movable cavity, and a second push rod 163 matched with the third through groove is arranged at the bottom of the fourth connecting plate 162; a seventeenth movable groove is formed in the first movable rod 15, a second movable rod 151 is arranged in the seventeenth movable groove, an eighteenth movable groove is formed in the side wall of the seventeenth movable groove, a third push rod 1511 is arranged on the second movable rod 151, the third push rod 1511 is arranged in the eighteenth movable groove in a penetrating manner, and the third push rod 1511 is arranged at the top of the second movable block 16; the side wall of the first connecting block 22 is rotatably connected with a second pushing block 221; the second pushing block is provided with a torsion spring which keeps the first connecting block in a horizontal state; a third reset spring 152 is arranged on the side wall of the first movable rod, the frame part drives the second push block to move together when moving downwards, the first connecting block returns to the initial position under the action of the first reset spring, the third reset spring pushes the first movable rod to reset, the second push block moves to the top of the second movable rod when moving downwards along with the frame part, the second push block pushes the second movable rod to move downwards, the second movable rod drives the third push rod to move downwards, the second movable block drives the fifth connecting rod to move downwards, the fourth connecting plate is driven to move together when the second movable block drives the fifth connecting rod to move downwards, the second push rod pushes the first push rod to descend, and air flow in the second cavity is pushed into the tenth movable groove, so that the first movable block is pushed to complete the resetting of the first movable block; when the second movable rod moves to a position where the second movable rod cannot move continuously, the second movable rod pushes the second push block to rotate, and the rotation of the second push block is utilized to provide one-time speed reduction for the descending of the frame part, so that the first connecting rod and the frame part are protected; when the frame part is pushed upwards, the second movable rod is originally positioned at the top of the seventeenth movable groove, and the second push block is overturned under the action of the second movable rod when abutting against the second movable rod, so that the frame part normally ascends.

As shown in fig. 22 and 23, a sixth movable cavity is arranged on the inner wall of the third movable groove, a fifth connecting plate 140 is arranged on the side wall of the sixth movable cavity, a third connecting rope is arranged on the fifth connecting plate 140, one end of the third connecting rope is fixedly connected to the fixed block 14, a second convex block 1401 is arranged on the fifth connecting plate 140, the second convex block 1401 is made of rubber, a nineteenth movable groove is arranged on the side wall of the sixth movable cavity, and the second convex block 1401 penetrates out of the nineteenth movable groove; a fourth connecting rope is arranged on the frame part 2, and one end of the fourth connecting rope is fixedly connected to the first supporting plate 12; the bottom of the first connecting rod 3 is provided with a buffer spring 31, the bottom of the buffer spring 31 is provided with a buffer plate 32, and the bottom of the buffer plate 32 is provided with a buffer pad; the cushion pad is made of rubber; when the first connecting rod moves downwards, the first connecting rod is in contact with the second bump, and the second bump plays a role in reducing the descending speed of the first connecting rod after being extruded, so that the first connecting rod is prevented from impacting the bottom of the third movable groove at a higher speed; the fifth connecting plate and the second bump move downwards along with the first connecting rod, the third connecting rope is in a loose state, the fixing block is still in an extending state, and the first supporting plate is fixed; when the first connecting rod moves to the bottom of the third movable groove, the buffer plate is in contact with the inner wall of the third movable groove, the buffer cushion and the buffer spring are matched to play a role in buffering the first connecting rod, so that the shock impact transmitted to the frame part is reduced, and the frame part is protected; when the head rod is in third activity tank bottom, the head rod still supports on the second lug lateral wall, when promoting frame portion up-motion, the head rod drives the same up-motion of fifth connecting plate, the third is connected the rope pulling fixed block and is entered into the eighth activity inslot, when frame portion continues up-motion, the first backup pad of fourth connection rope pulling overturns toward the second activity inslot, after frame portion removed to the support frame top position, first backup pad changes over to the second activity inslot, only need promote the frame portion and reset and can accomplish resetting of first backup pad, it is more convenient to make the use on public notice fence.

The fourth is connected the rope and can be pulled down from the frame portion, preferentially turns into the second movable groove back again at first backup pad and pulls down the fourth and connect the rope from the frame portion, avoids the fourth to connect the rope and causes the influence to the upset speed of first backup pad.

As shown in fig. 7, 9 and 25, a fourth return spring 1101 is arranged on the side wall of the supporting block, a twenty-first movable groove is arranged at the top of the fourth movable groove, an eighth connecting spring 1201 is arranged in the twenty-first movable groove, and a second limiting block 120 is arranged at the bottom end of the eighth connecting spring; a twenty-second movable groove is formed in the inner wall of the fourteenth movable groove, a third movable block 17 is arranged in the twenty-second movable groove, a fifth reset spring 171 is arranged on the third movable block, a fifth connecting rope is arranged on the third movable block, and one end of the fifth connecting rope is fixedly connected to the second limiting block; when the frame part moves relative to the support frame, the first connecting block pushes the first movable rod to move, the first movable rod pushes the third movable block to move, the third movable block pulls the fifth connecting rope when moving, the fifth connecting rope pulls the second limiting block to move upwards, the second limiting block enters the twenty-first movable groove, the fourth reset spring pulls the supporting block to enter the fourth movable groove, and the first connecting rod drops downwards after losing the supporting force, so that the frame part drops to the bottom of the support frame, the gravity center of the bulletin board is lowered, and the bulletin board is prevented from toppling; the twenty-second movable groove is formed to correspond to the moving stroke of the first movable rod, but the third movable block can pull the second limiting block to move immediately when moving in the twenty-second movable groove, so that the frame part falls down after losing the supporting force instantly after moving, the gravity center of the bulletin board is reduced, and the stability of the bulletin board is improved.

As shown in fig. 20, 21 and 25, a twenty-third movable groove is formed on the inner wall of the fourth movable groove, a third push rod 130 is arranged in the twenty-third movable groove, and a ninth connecting spring 1301 is arranged at one end of the third push rod; a twenty-fourth movable groove communicated with the twenty-third movable groove is formed in the top of the third movable groove, a fourth push plate 19 is arranged in the twenty-fourth movable groove, and a tenth connecting spring 191 is arranged on the fourth push plate; a seventh movable cavity is arranged on the frame part, a sixth connecting rod 212 is arranged in the seventh movable cavity, a plurality of sixth reset springs 213 are arranged at the top of the sixth connecting rod, a fourth through groove corresponding to the twenty-fourth movable groove is arranged at the top of the seventh movable cavity, and fourth push rods 214 communicated with the fourth through groove are respectively arranged at two ends of the sixth connecting rod; the bottom of the sixth connecting rod is provided with a seventh connecting rod 211, the bottom of the seventh connecting rod is provided with a fifth push plate 21, and the fifth push plate is arranged below the frame part; when the frame part is pushed to reset upwards, the fifth push plate is directly pushed to move upwards, the frame part drives the first connecting rod to move upwards, the first connecting rod moves to the top of the third movable groove, the first supporting plate enters the second movable groove to reset automatically, the first connecting rod moves to a position where the first connecting rod cannot move, the fifth push plate moves upwards relative to the frame part, the fifth push plate drives the sixth connecting rod to move, the sixth connecting rod drives the fourth push rod to extend out of the fourth movable groove, the fourth push rod pushes the fourth push plate to move, air in the twenty-fourth movable groove is pushed into the twenty-third movable groove, the third push rod is pushed to move by air pressure, the third push rod pushes the supporting block out of the fourth movable groove, and the supporting block automatically moves to the bottom connecting rod of the first connecting rod to provide supporting force for the first connecting rod; the supporting block stretches out from second stopper bottom through back second stopper and supports on the supporting block lateral wall, fixes the supporting block to fix frame portion on the state of rising.

As shown in fig. 24 and 28, a rotating roller 113 is arranged in the first movable groove, an eighth connecting rod 1131 is arranged on the rotating roller, and the universal wheel is arranged at one end of the eighth connecting rod; a twenty-fifth movable groove communicated with the first movable groove is formed in the base, the first push plate penetrates through the fifth movable groove to be in transmission fit with the rotary roller, and a seventh reset spring 111 is arranged at one end of the first push plate; a balancing weight and an eighth connecting block 112 are arranged on the base, a twenty-sixth movable groove is formed in the eighth connecting block, a twenty-seventh movable groove is formed in the side wall of the twenty-sixth movable groove, a limiting plate 1121 is arranged in the twenty-sixth movable groove, an eleventh connecting spring 1122 is arranged at the top of the limiting plate, and a third pushing block 1123 corresponding to the twenty-seventh movable groove is arranged on the side wall of the limiting plate; the first push plate is provided with a limiting groove corresponding to the limiting plate; when the bulletin board needs to be moved, one end of the bulletin board is lifted, the first push plate is pushed to enter the twenty-fifth movable groove, the rotary roller is driven to rotate when the first push plate moves, the universal wheel rotates out of the first movable groove along with the rotary roller, the limiting plate is inserted into the limiting groove to fix the first push plate, the rotary roller is fixed by the aid of the first push plate, and the universal wheel is prevented from entering the first movable groove when used; the universal wheel at the other end of the bulletin board is rotated out of the first movable groove in the same way, and the universal wheel is contacted with the ground, so that the bulletin board is more convenient to move; after the bulletin board moves to the assigned position, up promote the third ejector pad, the limiting plate rises from the spacing inslot, and seventh reset spring promotes first push pedal and moves outward, changes the roller and rotates to the universal wheel and change over to first activity inslot, and base bottom surface and ground contact increase base stability under the balancing weight effect to make the stable subaerial of standing of bulletin board.

Preferably, the two support frames can be connected by a connecting rod, and when the frame part is pushed to move upwards, the connecting rod for connecting the two support frames is stepped on, so that the support frames are prevented from rising together with the rising of the frame part.

The drawings of the invention are only schematic and the specific dimensions thereof are subject to practical implementation.