CN220081075U

CN220081075U - Fence

Info

Publication number: CN220081075U
Application number: CN202321683214.4U
Authority: CN
Inventors: 昝清松; 胡强; 白杨; 张宏利; 肖道粲; 丁崇彬
Original assignee: Shenzhen Absen Optoelectronic Co Ltd; Huizhou Absen Optoelectronic Co Ltd
Current assignee: Shenzhen Absen Optoelectronic Co Ltd; Huizhou Absen Optoelectronic Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-11-24
Anticipated expiration: 2033-06-29

Abstract

The utility model discloses a fence, which comprises: the display board is provided with a display surface and a support surface which are oppositely arranged; one end of the supporting piece is connected with the supporting surface and is used for supporting the display board; the base is arranged on the lower side of the display board, and one end of the support piece, which is far away from the display board, is connected with the base; the front support plate is detachably connected to the base, the base is provided with a sliding channel, the front support plate is provided with a containing position contained in the sliding channel and a supporting position connected with the base and extending towards the display surface, and the front support plate slides in the sliding channel so as to switch between the containing position and the supporting position. The technical scheme of the utility model can simplify the process of fixed installation, reduce operation steps and improve the convenience of installation.

Description

Fence

Technical Field

The utility model belongs to the technical field of display, and particularly relates to a fence.

Background

The fence screen is mainly applied to surround the edge of a court, the court is surrounded in the middle, and advertisements and information release are played through the fence screen. When placing the enclosure screen, it is necessary to support the enclosure screen on the field by a bottom support structure. However, the existing bottom support structure is complex in design, and the installation process of the bottom support structure is complex and lacks convenience in installation.

Disclosure of Invention

The utility model aims to provide a fence, which can effectively simplify the fixed installation process, reduce operation steps and improve the installation convenience.

Other features and advantages of the utility model will be apparent from the following detailed description, or may be learned by the practice of the utility model.

According to one aspect of an embodiment of the present utility model, there is provided a fence comprising:

the display board is provided with a display surface and a supporting surface which are oppositely arranged;

one end of the supporting piece is connected with the supporting surface, and the supporting piece is used for supporting the display board;

the base is arranged on the lower side of the display board, and one end, far away from the display board, of the supporting piece is connected with the base; and

the front support plate is detachably connected to the base, the base is provided with a sliding channel, the front support plate is provided with a containing position contained in the sliding channel and a supporting position connected with the base and extending towards the display surface, and the front support plate slides in the sliding channel so as to switch between the containing position and the supporting position.

In one aspect, the base comprises:

the upper side surface of the body is an unsealed opening;

the cover plate is arranged on the body, the sliding channel is formed between the cover plate and the body, a first through hole, a second through hole and a limit groove connected with the first through hole and the second through hole are formed in the cover plate, the first through hole is close to the display plate, and the second through hole is far away from the display plate;

the locating piece is arranged on the cover plate in a protruding mode, and when the front supporting plate is switched between the accommodating position and the supporting position, the locating piece moves between the first through hole and the second through hole along the limiting groove and is fixed at the first through hole and the second through hole.

In one aspect, a positioning hole is formed in one end, close to the base, of the front support plate surface, and the positioning hole is a through hole penetrating through the front support plate;

the positioning hole corresponds to the first through hole, the front supporting plate is positioned at the supporting position, the positioning piece penetrates through the first through hole and the positioning hole, and the positioning piece is abutted to the bottom surface of the base;

the locating hole corresponds the second through hole, the front supporting plate is located the accommodating position, the locating piece is arranged in the second through hole in a penetrating mode and the locating hole in a penetrating mode, and the locating piece is abutted to the bottom face of the base.

In one aspect, the positioning piece comprises a fixed column and a rotating part, the rotating part is arranged at one axial end of the fixed column, the fixed column is inserted into the limiting groove, the diameter of the rotating part is larger than the width of the notch of the limiting groove, and the positioning piece is detachably connected with the positioning hole.

In one aspect, the outer side wall of the front support plate and the inner side wall of the sliding channel are arranged at intervals, and the defined interval distance is d, so that the following conditions are satisfied: d is more than or equal to 0.5 and less than or equal to 2mm.

In one aspect, the base has a distal end far away from the display board, the support is inserted into the distal end of the base, the support is provided with an anti-drop opening, the fence further comprises an anti-drop mechanism, one side of the anti-drop mechanism is connected to the base, the other side extends to the anti-drop opening, and at least part of the structure is arranged in the anti-drop opening.

In one aspect, the anti-disengaging mechanism comprises a fixed pin and a pin seat, the pin seat is arranged at the far end of the base, the fixed pin is inserted into the pin seat and is in sliding fit with the pin seat, and one end of the fixed pin, which is far away from the display board, extends towards the anti-disengaging opening of the supporting piece and stretches into the anti-disengaging opening.

In one aspect, the side wall surface of the pin base is provided with a sliding groove, the sliding groove extends along the length direction of the base, the fixing pin is provided with a clamping part, the clamping part protrudes out of the sliding groove and is in sliding fit with the sliding groove, and when the support piece adjusts and supports the support angle of the display board, the clamping part is clamped to one side, away from the display board, of the sliding groove.

In one aspect, the anti-drop mechanism further comprises an elastic piece, the elastic piece is compressed and arranged in the pin seat, and the elastic piece is sleeved at one end, close to the display board, of the fixing pin and is abutted to the clamping portion.

In one aspect, the side wall surface of the pin seat is further provided with a clamping groove matched with the clamping part, the extending direction of the clamping groove is intersected with the extending direction of the sliding groove, the clamping groove is communicated with the sliding groove, and the clamping part can be limited in the clamping groove.

In the utility model, the display board and the supporting piece are arranged on the base, the display board and the supporting piece are fixed through the base, and the base, the display board and the supporting piece form a triangle, so that the structure is firmer. When the base of installation rail, preceding backup pad slides in the slip passageway of base, slides the supporting position with preceding backup pad, and preceding backup pad extends at the show face of show board, prevents that rail structure from wholly empting forward, improves stability. After the rail is used, the front supporting plate is slid to the accommodating position. Therefore, the installation can be completed by simple sliding, the process is simple, the operation steps are fewer, and the convenience of the installation is improved. And, through the detachable connection of preceding backup pad and base, preceding backup pad can be with the base separation, does not need unnecessary structure to inject preceding backup pad on the base, and overall structure is simpler.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 schematically shows a structural view of the fence of the present utility model in a display state.

Fig. 2 schematically shows a schematic view of the structure of the front support plate in the support position in the present utility model.

Fig. 3 schematically shows a schematic structure of the front support plate in the accommodating position in the present utility model.

Fig. 4 schematically shows an exploded view of fig. 2 in accordance with the present utility model.

Fig. 5 schematically illustrates a top view of the front support plate of fig. 3 according to the present utility model.

Fig. 6 schematically shows a schematic front view of the front support plate of fig. 3 according to the present utility model.

Fig. 7 is a schematic cross-sectional view schematically showing the front support plate of fig. 3 in a housed position according to the present utility model.

Fig. 8 schematically shows an enlarged schematic view of the structure of the portion a of fig. 7 according to the present utility model.

Fig. 9 schematically illustrates a structure of the positioning member abutting against the base.

Fig. 10 schematically shows a schematic view of the structure of the front support plate in the support position in the present utility model.

Fig. 11 schematically shows a schematic structure of the front support plate in the accommodated position in the present utility model.

Fig. 12 schematically shows a schematic view of the display surface of the fence of the present utility model in a display state.

Fig. 13 schematically shows an enlarged schematic view of the structure of the portion B in fig. 12 according to the present utility model.

Fig. 14 schematically shows a schematic structural view of the drop-out prevention mechanism in the present utility model.

Fig. 15 schematically shows an exploded structure of the drop-out prevention mechanism in the present utility model.

Fig. 16 is a schematic view schematically showing the structure of the rail in the folded state of the present utility model.

The reference numerals are explained as follows:

10. a display board; 20. a support; 30. a base; 40. a front support plate; 50. a positioning piece; 60. a cover plate; 70. an anti-drop mechanism;

110. a display surface; 120. a support surface; 210. an anti-drop opening; 220. a slot; 301. a distal end; 310. a sliding channel; 320. a body; 321. a connecting shaft; 410. positioning holes; 510. fixing the column; 520. a rotating part; 610. a first through hole; 620. a second through hole; 630. a limit groove; 710. a fixing pin; 720. a pin base; 711. a clamping part; 721. a chute; 722. a clamping groove; 730. an elastic member.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

Referring to fig. 1-3, the present utility model provides a fence for enclosing the perimeter of a venue, which may be a racefield or a venue for some recreational activities. The rail includes: the display board 10, the support 20, the base 30 and the front support plate 40 are horizontally placed on the ground, and the display board 10 and the support 20 are rotatably connected to the base 30. The display board 10 has a display surface 110 and a supporting surface 120 disposed opposite to each other, and the display surface 110 is used for providing a display screen, and the display screen is mainly a Light-Emitting Diode (LED).

One end of the supporting member 20 is connected with the supporting surface 120, and the supporting member 20 is used for supporting the display board 10; meanwhile, a supporting angle is formed between the supporting piece 20 and the base 30, and the supporting piece 20 is also used for adjusting the supporting angle.

The base 30 is arranged on the lower side of the display board 10, and one end of the support piece 20 away from the display board 10 is connected with the base 30; the display board 10, the supporting member 20 and the base 30 form a triangle structure, by which stability of the rail is improved.

The front support plate 40 is detachably connected to the base 30, the base 30 has a sliding channel 310, and the front support plate 40 can slide back and forth in the sliding channel 310. The front support plate 40 has a receiving position received in the slide passage 310 and a supporting position connected to the base 30 and extending toward the display surface 110, and the front support plate 40 slides in the slide passage 310 to switch between the receiving position and the supporting position. For example, when the front support plate 40 is required to be adjusted to the accommodated position, the front support plate 40 is pushed, and the front support plate 40 is pushed into the slide passage 310. When the front support plate 40 is required to be adjusted to the support position, the front support plate 40 is pulled to pull the front support plate 40 out of the sliding channel 310, so that the front support plate 40 protrudes out of the display surface 110 of the display plate 10, and the whole fence structure is prevented from toppling forward by the support of the front support plate 40, so that the whole fence structure is more stable on the field.

In the utility model, the display board 10 and the supporting piece 20 are both arranged on the base 30, the display board 10 and the supporting piece 20 are fixed by the base 30, and the base 30, the display board 10 and the supporting piece 20 form a triangle, so that the structure is firmer. When the base 30 of the fence is installed, the front support plate 40 slides in the sliding channel 310 of the base 30 to slide the front support plate 40 to the supporting position, and the front support plate 40 extends on the display surface 110 of the display board 10, so that the whole fence structure is prevented from toppling forward, and the stability is improved. After the pen is used, the front support plate 40 is slid to the stowed position. Therefore, the installation can be completed by simple sliding, the process is simple, the operation steps are fewer, and the convenience of the installation is improved. In addition, through the detachable connection of the front support plate 40 and the base 30, the front support plate 40 can be separated from the base 30, and the front support plate 40 is limited on the base 30 without redundant structures, so that the whole structure is simpler.

Referring to fig. 4 to 6, in order to make the front support plate 40 more firm in the accommodated position and the support position, the base 30 includes: the body 320, the cover plate 60 and the positioning member 50. The upper side of the body 320 is an unsealed opening; the cover plate 60 is arranged on the body 320, the sliding channel 310 is formed between the cover plate 60 and the body 320, the cover plate 60 is provided with a first through hole 610 and a second through hole 620, and a limit groove 630 connected with the first through hole 610 and the second through hole 620, the first through hole 610 is close to the display board 10, and the second through hole 620 is far away from the display board 10; the positioning member 50 is protruded on the cover plate 60, and when the front support plate 40 is switched between the receiving position and the supporting position, the positioning member 50 moves between the first through hole 610 and the second through hole 620 along the limiting groove 630 and is fixed at the positions of the first through hole 610 and the second through hole 620.

Specifically, the first through hole 610 is close to the display board 10, the second through hole 620 is far away from the display board 10, the size of the opening of the first through hole 610 is matched with the size of the diameter of the positioning member 50, and meanwhile, the size of the opening of the second through hole 620 is matched with the size of the diameter of the positioning member 50, that is, the positioning holes 410 of the first through hole 610 and the second through hole 620 can accommodate the lower positioning member 50.

When the front support plate 40 moves in the sliding channel 310, the positioning piece 50 corresponds to the first through hole 610, and the front support plate 40 is located at the supporting position, at this time, the positioning piece 50 is inserted into the first through hole 610, and the position between the front support plate 40 and the base 30 can be fixed by pressing the positioning piece 50 against the front support plate 40. Thereby, the front support plate 40 can be more stable at the support position, preventing the front support plate 40 from sliding arbitrarily in the sliding passage 310.

Similarly, when the front support plate 40 is moved in the slide passage 310, the positioning member 50 corresponds to the second through hole 620, and the front support plate 40 is positioned at the storage position, and at this time, the positioning member 50 is inserted into the second through hole 620, and the positions of the front support plate 40 and the base 30 can be fixed to each other. This stabilizes the front support plate 40 in the storage position, and further prevents the front support plate 40 from sliding freely in the slide passage 310.

In order to facilitate the sliding of the positioning member 50, the cover plate 60 is further provided with a limiting groove 630, the limiting groove 630 communicates with the first through hole 610 and the second through hole 620, and the front support plate 40 is cut between the accommodating position and the support position

In another embodiment, the positioning member 50 is disposed in the limiting slot 630 and moves along the limiting slot 630 between the first through hole 610 and the second through hole 620. When the front support plate 40 moves along the sliding channel 310, the positioning member 50 slides along the limiting groove 630, so that the sliding direction of the positioning member 50 is ensured to be accurate. Meanwhile, the positioning piece 50 is positioned in the limiting groove 630, so that the positioning piece 50 is prevented from being separated from the front supporting plate 40. When the front support plate 40 slides, the positioning member 50 is retained on the front support plate 40, preventing the positioning member 50 from being arbitrarily detached.

Referring to fig. 7 and 8, it should be noted that the cover 60 is fixed to the base 30. When the front support plate 40 is fixed in the accommodating position and the supporting position, the positioning member 50 moves downwards, the positioning member 50 is pressed on the cover plate 60, and the position of the front support plate 40 is fixed by increasing the friction force between the positioning member 50 and the cover plate 60. The positions of the front support plate 40 and the cover plate 60 are relatively fixed, that is, correspond to the positions of the front support plate 40 and the base 30.

Referring to fig. 9, in addition, a positioning hole 410 is disposed at one end of the front support plate 40 near the base 30, the positioning hole 410 is a through hole penetrating the front support plate 40, the positioning hole 410 corresponds to the first through hole 610, the front support plate 40 is located at the supporting position, the positioning member 50 is disposed through the first through hole 610 and the positioning hole 410, and the positioning member 50 abuts against the bottom surface of the base 30; the positioning hole 410 corresponds to the second through hole 620, the front support plate 40 is located at the accommodating position, the positioning piece 50 is disposed through the second through hole 620 and the positioning hole 410, and the positioning piece 50 abuts against the bottom surface of the base 30. The positioning element 50 is located in the first through hole 610 or the second through hole 620, the positioning element 50 is disposed through the positioning hole 410, and the positioning element 50 abuts against the bottom surface of the base 30.

Referring to fig. 10 and 11, the cover 60 includes two parts, one part is located at the front end of the body 320, the other part is located near the distal end 301 of the body 320, and the opening of the limiting groove 630 is relatively large, for example, the limiting groove 630 is disposed open.

When fixing the position of the front support plate 40, the positioning member 50 passes through the positioning hole 410, and the lower end of the positioning member 50 directly contacts the bottom surface of the body 320. In this way, the friction between the positioning member 50 and the base 30 increases, fixing the relative positions of the front support plate 40 and the base 30.

Referring to fig. 4 again, further, the positioning element 50 includes a fixing column 510 and a rotating portion 520, the rotating portion 520 is disposed at one axial end of the fixing column 510, the fixing column 510 is inserted into the limiting groove 630, the diameter of the rotating portion 520 is larger than the width of the notch of the limiting groove 630, and the positioning element 50 is detachably connected with the positioning hole 410 _。

For example, the sidewall surface of the positioning hole 410 forms an internal thread, and the outer side surface of the fixing post 510 is provided with an external thread that is adapted to the internal thread of the positioning hole 410. When the front support plate 40 is fixed, the rotating part 520 is rotated, and the fixing column 510 rotates together with the rotating part 520. The fixing post 510 is screwed with the positioning hole 410, and the fixing post 510 moves down and goes deep into the positioning hole 410. Since the diameter of the rotating part 520 is larger than the width of the notch of the limiting groove 630, the rotating part 520 moves down to be pressed against the notch of the limiting groove 630 of the cover plate 60, and the friction between the rotating part 520 and the cover plate 60 is increased, thereby completing the fixation of the front support plate 40 and the cover plate 60 and preventing the front support plate 40 from sliding randomly.

Wherein, the surface of the rotating part 520 facing away from the fixed column 510 is provided with a straight slot or a cross slot, and when the screwdriver is used for twisting the positioning element 50, the screwdriver can be inserted into the straight slot or the cross slot, so as to facilitate twisting the positioning element 50.

The outer side surface of the rotating part 520 may be further provided with anti-slip patterns, so that when the rotating part 520 is manually rotated, friction force can be increased, which is convenient for torsion stress of the rotating part 520 and prevents slipping.

In order to further improve the convenience of sliding between the front support plate 40 and the base 30, the outer side wall of the front support plate 40 and the inner side wall of the sliding channel 310 are spaced, so that contact between the front support plate 40 and the inner side wall of the sliding channel 310 can be reduced, friction is reduced, and sliding of the front support plate 40 is more labor-saving. Defining the spacing distance as d, the following is satisfied: d is more than or equal to 0.5 and less than or equal to 2mm. For example, the separation distance d may be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm. The separation distance of course also has a certain error size, typically an error size of 0.1 to 0.2mm.

Referring to fig. 12 and 13, the display surface 110 of the display board 10 is the front and the support surface 120 of the display board 10 is the rear. In order to prevent the support member 20 from being separated from the base 30 when the supporting angle is adjusted, so that the display board 10 is inclined, the fence further comprises an anti-falling mechanism 70, the base 30 is provided with a distal end 301 far away from the display board 10, the anti-falling mechanism 70 is arranged at the distal end 301 of the base 30, the support member 20 is inserted into the distal end of the base, the support member 20 is provided with an anti-falling opening 210, one side of the anti-falling mechanism 70 is connected to the base 30, the other side of the anti-falling mechanism 70 extends to the anti-falling opening 210, and at least part of the structure is arranged in the anti-falling opening 210. The anti-falling mechanism 70 is used for limiting the support 20 to the distal end of the base 30 when the support 20 adjusts the support angle of the support display board 10, so as to prevent the support 20 from falling off the base.

Wherein, the distal end 301 of the base 30 is provided with a connecting shaft 321, the slot 220 of the support member is aligned to the connecting shaft 321, the slot 220 is inserted on the connecting shaft 321, and the support member 20 and the base 30 are convenient to detach and separate in such an inserting manner, so that the fence is convenient to fold. However, since the support 20 and the base 30 are easily separated, the support 20 may be defined at the distal end 301 of the base 30 by the anti-falling mechanism.

Referring to fig. 14, the anti-disengagement mechanism 70 includes a fixed pin 710 and a pin holder 720, the pin holder 720 is disposed at the distal end 301 of the base 30, and the fixed pin 710 is inserted into the pin holder 720 and slidably engaged with the pin holder 720. The fixing pin 710 extends toward the escape prevention opening 210 of the support 20 away from one end of the display board 10 and protrudes into the escape prevention opening 210. Here, the fixing pin 710 may be abutted against the connection shaft 321 of the base, or the fixing pin 710 and the connection shaft 321 of the base may be spaced apart from each other by a small distance, and the support 20 cannot be separated from the space.

Further, a sliding groove 721 is formed on a side wall surface of the pin base 720, the sliding groove 721 extends along a length direction of the base 30, the fixing pin 710 is provided with a clamping portion 711, the clamping portion 711 protrudes out of the sliding groove 721 and is slidably matched with the sliding groove 721, and when the supporting angle of the supporting member 20 for supporting the display board 10 is adjusted, the clamping portion 711 is clamped at one side of the sliding groove 721 away from the display board 10.

In order to further improve convenience, the anti-disengaging mechanism 70 further includes an elastic member 730, where the elastic member 730 is compressed and disposed in the pin seat 720, and the elastic member 730 is sleeved on one end of the fixing pin 710 near the display board 10 and abuts against the clamping portion 711. The elastic member 730 has elastic pressure, and one end of the elastic member 730 acts on the pin boss 720 and the other end acts on the fixing pin 710. The fixing pin 710 is automatically moved away from the display board 10 by the pressure of the elastic member 730.

Referring to fig. 15, in order to flexibly adjust the position of the locking portion 711, a locking groove 722 matching the locking portion 711 is further formed on the side wall of the pin holder 720, the extending direction of the locking groove 722 is intersected with the extending direction of the sliding groove 721, the locking groove 722 communicates with the sliding groove 721, and the locking portion 711 may be limited in the locking groove 722.

Referring to fig. 16, after the pen is used, the pen is required to be folded up, and the anti-disengaging mechanism 70 is not required to function. At this time, the engaging portion 711 is moved into the engaging groove 722, so that the engaging portion 711 does not slide in the sliding motion, and the support member cannot be limited to the distal end 301 of the base 30.

When the fence is needed, the supporting member 20 is inserted on the connecting shaft 321 of the base 30, the clamping portion 711 is rotated, the clamping portion 711 is released from the clamping groove 722, the clamping portion 711 is released into the sliding groove 721, the fixing pin 710 stretches into the anti-falling opening 210 under the pushing of the elastic member 730, and the supporting member 20 is clamped on the connecting shaft 321, so that the anti-falling mechanism 70 is ensured to play an anti-falling role.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A pen, the pen comprising:

2. The pen of claim 1, wherein the base comprises:

the upper side surface of the body is an unsealed opening;

3. The fence of claim 2, wherein a positioning hole is formed in one end of the front support plate surface, which is close to the base, and the positioning hole is a through hole penetrating the front support plate;

4. The fence of claim 3, wherein the positioning member comprises a fixing column and a rotating part, the rotating part is arranged at one axial end of the fixing column, the fixing column is inserted into the limiting groove, the diameter of the rotating part is larger than the width of the notch of the limiting groove, and the positioning member is detachably connected with the positioning hole.

5. The pen according to claim 1 wherein the outer side wall of the front support plate and the inner side wall of the sliding channel are spaced apart to define a spacing distance d, satisfying the following: d is more than or equal to 0.5 and less than or equal to 2mm.

6. The pen of any one of claims 1 to 5 wherein the base has a distal end remote from the display board, the support is inserted at the distal end of the base, the support is provided with a drop-out prevention opening, the pen further comprises a drop-out prevention mechanism, one side of the drop-out prevention mechanism is connected to the base, the other side extends toward the drop-out prevention opening, and at least part of the structure is disposed in the drop-out prevention opening.

7. The playpen of claim 6, wherein the anti-release mechanism includes a securing pin and a keyway, the keyway being located at the distal end of the base, the securing pin being inserted into and slidably engaged with the keyway, the securing pin extending away from an end of the display plate toward and into the anti-release opening of the support member.

8. The fence of claim 7, wherein a sliding groove is formed in a side wall surface of the pin base, the sliding groove extends along a length direction of the base, the fixing pin is provided with a clamping portion, the clamping portion protrudes out of the sliding groove and is in sliding fit with the sliding groove, and when the supporting piece adjusts and supports a supporting angle of the display board, the clamping portion is clamped on one side, away from the display board, of the sliding groove.

9. The pen of claim 8, wherein the anti-drop mechanism further comprises an elastic member, the elastic member is compressed and disposed in the pin seat, and the elastic member is sleeved on one end of the fixing pin, which is close to the display board, and is abutted against the clamping portion.

10. The fence of claim 8, wherein the sidewall surface of the pin base is further provided with a clamping groove matching the clamping portion, the extending direction of the clamping groove intersects with the extending direction of the sliding groove, the clamping groove is communicated with the sliding groove, and the clamping portion can be limited in the clamping groove.