CN211506989U - Ratchet wheel quick lock and LED display screen with same - Google Patents

Abstract

The application discloses a ratchet wheel quick lock and an LED display screen with the ratchet wheel quick lock, wherein the ratchet wheel quick lock comprises a lock seat, a lock plate, a lock rod, a lock head and a handle, a first axial chute, a second axial chute and a circumferential chute are formed in the side wall of the lock rod, one end of the first axial chute and one end of the second axial chute are respectively communicated with two ends of the circumferential chute, and the other ends of the first axial chute and the second axial chute face the lock head; the lock seat and the lock head are sleeved on the lock rod; the lock seat is provided with a fixing piece, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove. This application ratchet quick lock is when jam plate and lock seat locking, and the rotation of locking lever can be restricted to the second axial spout, avoids appearing because the locking lever rotates and leads to the condition that the mounting imbeds first axial spout and unblank, has improved the stability when the ratchet quick lock locks when realizing the locking of ratchet quick lock.

Description

Ratchet wheel quick lock and LED display screen with same

Technical Field

The application relates to the technical field of display, in particular to a ratchet wheel quick lock and an LED display screen with the same.

Background

With the development of LED display technology and the promotion of the market demand of display application, the high-density and high-definition LED display screen becomes a new favorite in the market.

The LED display screen is visual and convenient to display, and is widely applied to advertisement exhibition. The existing LED display screen mostly adopts a box body structural design, and unit box bodies are spliced into a large-screen LED display screen according to specification requirements.

The splicing of the existing LED unit box bodies is mostly provided with a hoisting part, and the hoisting part penetrates through two adjacent LED unit box bodies to be fixedly connected. But the locking stability of the hoisting part in the prior art is not high.

In view of the above, overcoming the deficiencies of the prior art is an urgent problem in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a quick lock of ratchet and has LED display screen of quick lock of this ratchet, and this quick lock of ratchet can improve the degree of stability when the quick lock of ratchet locks when realizing the locking of quick lock of ratchet.

In order to solve the technical problem, the application adopts a technical scheme that: provides a ratchet wheel quick lock, which comprises a lock seat, a lock plate, a lock rod, a lock head and a handle,

the lock head and the handle are respectively arranged at the two ends of the lock rod,

the side wall of the lock rod is provided with a first axial sliding groove, a second axial sliding groove and a circumferential sliding groove, one end of the first axial sliding groove and one end of the second axial sliding groove are respectively communicated with two ends of the circumferential sliding groove, and the other ends of the first axial sliding groove and the second axial sliding groove face the lock head;

the lock seat and the lock head are sleeved on the lock rod;

a fixing piece is arranged on the lock seat, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove;

the handle drives the lock rod to rotate, so that one end of the fixing piece is embedded into the first axial sliding groove or the second axial sliding groove along the circumferential sliding groove;

when the fixing piece is embedded into the second axial sliding groove, the handle is close to the lock head, so that the lock plate and the lock seat are locked;

when the fixing piece is embedded into the first axial chute, the lock head can penetrate through the lock plate, and the lock plate and the lock seat are unlocked.

The lock plate is provided with a first through hole, the lock seat is provided with a second through hole, and the lock rod penetrates through the first through hole and the second through hole.

The section shape of the lock head is the same as that of the first through hole, and the section shape of the lock head is non-circular.

The fixing piece is a fastening rod, threads are arranged on the side wall of the fastening rod, a third through hole is arranged on the side wall of the lock seat, threads are arranged on the side wall of the third through hole, and the fixing piece is screwed into the third through hole through the threads to be embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove.

Wherein, the handle includes hand (hold) and sleeve pipe, the hand (hold) is fixed in on the sheathed tube lateral wall, sheathed tube inside is equipped with the screw thread, the lateral wall of locking lever is equipped with the screw thread, the sleeve pipe with the locking lever passes through threaded connection, the mounting embedding during second axial spout, the sleeve pipe is relative the locking lever rotates, thereby promotes the lock seat is close to the jam plate, in order to lock the jam plate with the lock seat.

Wherein, the handle still includes locking spanner and elastomeric element, the hand (hold) cavity, the hand (hold) with the sleeve pipe intercommunication, the card gear has been accommodated in the sleeve pipe, card gear fixed connection is in the one end of locking lever, elastomeric element connects locking spanner with the hand (hold) under elastomeric element's the effect, locking spanner support hold in the card gear, in order to restrict the handle is relative the rotation of locking lever, when locking spanner is pressed, locking spanner release support hold in the card gear, so that the handle can be relative the locking lever rotates.

The elastic component is a torsion spring, a support column is arranged on the inner wall of the handle, and the torsion spring and the locking wrench are sequentially sleeved on the support column; the handle further comprises a bottom cover, and the bottom cover is in threaded connection with the supporting column.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided an LED display screen comprising the ratchet wheel snap lock of any one of the first aspects.

The LED display screen comprises a plurality of LED unit boxes, and the lock seat and the lock plate of the ratchet wheel quick lock are respectively arranged on the adjacent two LED unit boxes.

The lock seat of the ratchet wheel quick lock is integrally connected with the LED unit box body in a forming mode;

or the lock seat of the ratchet wheel quick lock is detachably connected with the LED unit box body.

The beneficial effect of this application is: the ratchet wheel quick lock comprises a lock seat, a lock plate, a lock rod, a lock head and a handle, wherein a first axial chute, a second axial chute and a circumferential chute are formed in the side wall of the lock rod; the lock seat and the lock head are sleeved on the lock rod; the lock seat is provided with a fixing piece, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove; the handle drives the lock rod to rotate so that one end of the fixing piece is embedded into the first axial sliding groove or the second axial sliding groove along the circumferential sliding groove; when the fixing piece is embedded into the second axial chute, the handle is close to the lock head so as to lock the lock plate and the lock seat; when the fixing piece is embedded into the first axial chute, the lock head can penetrate through the lock plate, and the lock of the lock plate and the lock seat is released. This application ratchet fast lock can twist grip make the mounting on the lock seat through the first axial spout of circumference spout embedding or the second axial spout with opening and shutting of control ratchet fast lock to when jam plate and lock seat locking, the rotation of locking lever can be restricted to the second axial spout, avoid appearing because the locking lever rotates and leads to the condition that the mounting imbeds first axial spout and unblank, improved the stability when the ratchet fast lock locks when realizing the locking of ratchet fast lock.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of a first perspective structure of an embodiment of a ratchet quick lock according to the present application;

FIG. 2 is a schematic diagram illustrating a second perspective structure of an embodiment of a ratchet quick lock according to the present application;

FIG. 3 is a schematic diagram of a first exploded structure of an embodiment of a ratchet quick lock according to the present disclosure;

FIG. 4 is a schematic diagram of a second exploded structure of an embodiment of a ratchet quick lock according to the present application;

FIG. 5 is a schematic view of a lock lever of an embodiment of a ratchet express lock provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an embodiment of an LED display screen provided in the present application;

fig. 7 is a detailed structure diagram of a region a in the LED display screen in fig. 6.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiment of the application provides a ratchet wheel quick lock, which comprises a lock seat, a lock plate, a lock rod, a lock head and a handle, wherein the side wall of the lock rod is provided with a first axial chute, a second axial chute and a circumferential chute; the lock seat and the lock head are sleeved on the lock rod; the lock seat is provided with a fixing piece, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove; the handle drives the lock rod to rotate so that one end of the fixing piece is embedded into the first axial sliding groove or the second axial sliding groove along the circumferential sliding groove; when the fixing piece is embedded into the second axial chute, the handle is close to the lock head so as to lock the lock plate and the lock seat; when the fixing piece is embedded into the first axial chute, the lock head can penetrate through the lock plate, and the lock of the lock plate and the lock seat is released.

The following are detailed below.

Referring to fig. 1-5, fig. 1 is a schematic view illustrating a first view structure of an embodiment of a ratchet quick lock according to the present application; FIG. 2 is a schematic diagram illustrating a second perspective structure of an embodiment of a ratchet quick lock according to the present application; FIG. 3 is a schematic diagram of a first exploded structure of an embodiment of a ratchet quick lock according to the present disclosure; FIG. 4 is a schematic diagram of a second exploded structure of an embodiment of a ratchet quick lock according to the present application; FIG. 5 is a schematic view of a lock lever of an embodiment of a ratchet express lock provided by an embodiment of the present application.

In the embodiment of the present application, the ratchet quick lock 10 includes a lock base 12, a lock plate 11, a lock rod 13, a lock head 15, and a handle 14. The two ends of the lock rod 13 are respectively provided with a lock head 15 and a handle 14, the side wall of the lock rod 13 is provided with a first axial sliding chute 131, a second axial sliding chute 133 and a circumferential sliding chute 132, one end of the first axial sliding chute 131 and one end of the second axial sliding chute 133 are respectively communicated with the two ends of the circumferential sliding chute 132, and the other ends of the first axial sliding chute 131 and the second axial sliding chute 133 face the lock head 15. The lock holder 12 and the lock head 15 are sleeved on the lock rod 13. A fixing piece 123 is arranged on the lock base 12, and one end of the fixing piece 123 penetrates through the side wall of the lock base 12 and is embedded into the first axial sliding groove 131, the second axial sliding groove 133 or the circumferential sliding groove 132; the handle 14 drives the lock rod 13 to rotate, so that one end of the fixing member 123 is embedded into the first axial sliding groove 131 or the second axial sliding groove 133 along the circumferential sliding groove 132; when the fixing member 123 is inserted into the second axial sliding groove 133, the handle 14 approaches the lock head 15, so that the lock plate 11 and the lock base 12 are locked; when the fixing member 123 is inserted into the first axial sliding groove 131, the lock head 15 can penetrate through the lock plate 11 and the lock base 12, and the lock of the lock plate 11 and the lock base 12 is released.

In the embodiment of the present application, the lock plate 11 is provided with a first through hole 111, the lock base 12 is provided with a second through hole 121, and the lock rod 13 penetrates through the first through hole 111 and the second through hole 121. The second through hole 121 extends from one side of the lock base 12 to the other side of the lock base 12 through the lock base 12. Preferably, the lock rod 13 is a cylinder, the second through hole 121 is a circular hole, but the second through hole 121 may also be in other shapes such as a triangle, a polygon, etc., and it is only necessary to ensure that the lock rod 13 can rotate through the second through hole 121.

In the embodiment of the present application, the sectional shape of the locking head 15 is the same as the sectional shape of the first through hole 111, and the sectional shape of the locking head 15 is non-circular. For example, the cross-sectional shape of the lock head 15 is rectangular, square, triangular, elliptical, polygonal, irregular, or the like. The sectional shape of tapered end 15 is the same with the sectional shape of first through-hole 111, and is non-circular, and tapered end 15 can pass first through-hole 111, but, after tapered end 15 relatively rotated first through-hole 111 and rotated preset angle, tapered end 15 can't rethread first through-hole 111 to can support and hold jam plate 11. Of course, the sectional shape of the lock head 15 may be different from the sectional shape of the first through hole 111, and the present application does not limit this.

In this embodiment, the fixing member 123 is a fastening rod, a side wall of the fastening rod is provided with a screw thread, a side wall of the lock base 12 is provided with a third through hole 122, a side wall of the third through hole 122 is provided with a screw thread, and the fixing member 123 is screwed into the third through hole 122 through the screw thread to be embedded into the first axial sliding groove 131, the circumferential sliding groove 132, or the second axial sliding groove 133.

In this embodiment, the handle 14 includes a handle 141 and a sleeve 142, the handle 141 is fixed on an outer side wall of the sleeve 142, a thread is provided inside the sleeve 142, a thread is provided on a side wall of the locking rod 13, the sleeve 142 is connected with the locking rod 13 through the thread, and when the fixing member 123 is embedded in the second axial sliding groove 133, the sleeve 142 rotates relative to the locking rod 13 to be close to the lock seat 12, so as to push the lock seat 12 to be close to the lock plate 11, so as to lock the lock plate 11 and the lock seat 12. In particular, handle 141 extends in a direction away from sleeve 142 to facilitate rotation of sleeve 142 by a person via handle 141.

In the embodiment of the present application, the handle 14 further includes a locking wrench 145 and an elastic member 144, the handle 141 is hollow, the handle 141 is communicated with the sleeve 142, the sleeve 142 accommodates a snap gear 143, the snap gear 143 is fixedly connected to one end of the lock rod 13, the elastic member 144 connects the locking wrench 145 and the handle 141, under the action of the elastic member 144, the locking wrench 145 abuts against the snap gear 143 to limit the rotation of the handle 14 relative to the lock rod 13, and when the locking wrench 145 is pressed, the locking wrench 145 is released from abutting against the snap gear 143, so that the handle 14 can rotate relative to the lock rod 13.

In the embodiment of the present application, the elastic component 144 is a torsion spring, a supporting pillar 146 is disposed on the inner wall of the handle 141, and the torsion spring and the locking wrench 145 are sequentially sleeved on the supporting pillar 146; the handle 14 also includes a bottom cap 147, the bottom cap 147 being threadably connected to the support post 146.

The application provides a ratchet wheel quick lock, which comprises a lock seat, a lock plate, a lock rod, a lock head and a handle, wherein the lock head and the handle are respectively arranged at two ends of the lock rod; the lock seat and the lock head are sleeved on the lock rod; the lock seat is provided with a fixing piece, and the handle drives the lock rod to move so that one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the circumferential sliding groove; when the fixing piece is embedded into the circumferential sliding groove, the axial movement of the lock rod is limited, the lock head abuts against one side of the lock plate, which is far away from the lock seat, and the circumferential sliding groove abuts against the fixing piece on the lock seat so as to lock the lock plate and the lock seat; when the fixing piece is embedded into the first axial sliding groove, the limit on the axial movement of the lock rod is removed, so that the lock plate and the lock seat are unlocked. This application quick lock of ratchet can the twist grip make the first axial spout of mounting embedding or circumference spout on the lock seat to the locking of quick lock of control ratchet supports through the circumference spout and holds the mounting, realizes the locking of quick lock of ratchet, has improved the degree of stability when quick lock of ratchet locks.

Further, referring to fig. 6 and fig. 7, fig. 6 is a schematic structural diagram of an embodiment of an LED display screen provided in the present application; fig. 7 is a detailed structure diagram of a region a in the LED display screen in fig. 6.

In the embodiment of the present application, the LED display screen 20 includes a plurality of LED unit boxes, and the lock seat and the lock plate of the ratchet wheel quick lock are respectively disposed on two adjacent LED unit boxes.

In a specific embodiment, the LED display screen 20 includes two adjacent LED unit cases, a first LED unit case 21 and a second LED unit case 22. The lock seat 12 and the lock plate 11 of the ratchet wheel quick lock are respectively arranged on the first LED unit box body 21 and the second LED unit box body 22.

It should be noted that the lock seat 12 and the lock plate 11 of the ratchet wheel quick lock can be respectively located on the lateral beams of the first LED unit box 21 and the second LED unit box 22, so as to longitudinally lock the first LED unit box 21 and the second LED unit box 22. The lock seat 12 and the lock plate 11 of the ratchet wheel quick lock can also be respectively positioned on the side longitudinal beams of the first LED unit box body 21 and the second LED unit box body 22 so as to transversely lock the first LED unit box body 21 and the second LED unit box body 22.

In one embodiment, the lock base 12 of the ratchet quick lock is integrally formed with the first LED unit housing 21. In another specific embodiment, the lock seat 12 of the ratchet quick lock and the first LED unit box 21 can be detachably connected by a bolt, a snap, or the like.

With reference to fig. 1-7, the process of installing the ratchet quick lock 10 on the LED display screen is as follows:

the handle 14 is pulled in a direction away from the lock plate 11, so that one end of the fixing member 123 reaches one end of the first axial chute 131 close to the lock plate 11, and the ratchet quick lock is in an open state (the state in fig. 5). The first LED unit box 21 and the second LED unit box 22 are aligned, so that the lock seat 12 and the lock plate 11 of the ratchet wheel quick lock are aligned. The handle 14 is pushed in a direction approaching the lock plate 11 so that one end of the fixing member 123 reaches one end of the first axial sliding groove 131 communicating with the circumferential sliding groove 132. The handle 14 is rotated so that one end of the fixing member 123 enters the circumferential slide groove 132 and enters the communication between the circumferential slide groove 131 and the second axial slide groove 133 through the circumferential slide groove 131.

Further, when the locking wrench 145 is pressed, the locking wrench 145 no longer abuts against the latch gear 143, and the handle 14 can rotate relative to the lock lever 13. The handle 14 is rotated continuously, the handle 14 is rotated by the screw thread, and can approach the lock base 12, and push the lock base 12 to approach the lock plate 11, at this time, the fixing member 123 follows the lock base 12 to approach the lock plate 11 along the second axial sliding groove 133, and when the lock plate 11 abuts against the lock head 15, the lock base 12 and the lock plate 11 are locked by abutting against both sides of the lock head 15 and the handle 14. When the locking wrench 145 is loosened, the locking wrench 145 abuts against the latch gear 143 under the action of the elastic member 144 to limit the rotation of the handle 14 relative to the lock lever 13. To this end, the lock housing 12 and the lock plate 11 are fastened. I.e. the first LED unit housing 21 and the second LED unit housing 22 are fastened.

The beneficial effect of this application is: the ratchet wheel quick lock comprises a lock seat, a lock plate, a lock rod, a lock head and a handle, wherein a first axial chute, a second axial chute and a circumferential chute are formed in the side wall of the lock rod; the lock seat and the lock head are sleeved on the lock rod; the lock seat is provided with a fixing piece, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove; the handle drives the lock rod to rotate so that one end of the fixing piece is embedded into the first axial sliding groove or the second axial sliding groove along the circumferential sliding groove; when the fixing piece is embedded into the second axial chute, the handle is close to the lock head so as to lock the lock plate and the lock seat; when the fixing piece is embedded into the first axial chute, the lock head can penetrate through the lock plate, and the lock of the lock plate and the lock seat is released. This application ratchet fast lock can twist grip make the mounting on the lock seat through the first axial spout of circumference spout embedding or the second axial spout with opening and shutting of control ratchet fast lock to when jam plate and lock seat locking, the rotation of locking lever can be restricted to the second axial spout, avoid appearing because the locking lever rotates and leads to the condition that the mounting imbeds first axial spout and unblank, improved the stability when the ratchet fast lock locks when realizing the locking of ratchet fast lock.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (10)

1. A ratchet wheel quick lock is characterized in that the ratchet wheel quick lock comprises a lock seat, a lock plate, a lock rod, a lock head and a handle,

the lock head and the handle are respectively arranged at the two ends of the lock rod,

the side wall of the lock rod is provided with a first axial sliding groove, a second axial sliding groove and a circumferential sliding groove, one end of the first axial sliding groove and one end of the second axial sliding groove are respectively communicated with two ends of the circumferential sliding groove, and the other ends of the first axial sliding groove and the second axial sliding groove face the lock head;

the lock seat and the lock head are sleeved on the lock rod;

a fixing piece is arranged on the lock seat, and one end of the fixing piece penetrates through the side wall of the lock seat and is embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove;

the handle drives the lock rod to rotate, so that one end of the fixing piece is embedded into the first axial sliding groove or the second axial sliding groove along the circumferential sliding groove;

when the fixing piece is embedded into the second axial sliding groove, the handle is close to the lock head, so that the lock plate and the lock seat are locked;

when the fixing piece is embedded into the first axial chute, the lock head can penetrate through the lock plate, and the lock plate and the lock seat are unlocked.

2. The ratchet wheel quick lock according to claim 1, wherein a first through hole is formed in the lock plate, a second through hole is formed in the lock base, and the lock rod penetrates through the first through hole and the second through hole.

3. The ratchet quick lock of claim 2, wherein the cross-sectional shape of the locking head is the same as the cross-sectional shape of the first through hole, and the cross-sectional shape of the locking head is non-circular.

4. The ratchet quick lock according to claim 1, wherein the fixing member is a fastening rod, a side wall of the fastening rod is provided with a screw thread, a side wall of the lock holder is provided with a third through hole, a side wall of the third through hole is provided with a screw thread, and the fixing member is screwed into the third through hole to be embedded into the first axial sliding groove or the second axial sliding groove or the circumferential sliding groove.

5. The quick ratchet lock according to claim 1, wherein the handle comprises a handle and a sleeve, the handle is fixed on the outer side wall of the sleeve, threads are arranged inside the sleeve, threads are arranged on the side wall of the locking rod, the sleeve is in threaded connection with the locking rod, and when the fixing member is embedded into the second axial sliding groove, the sleeve rotates relative to the locking rod, so that the locking seat is pushed to be close to the locking plate to lock the locking plate and the locking seat.

6. The ratchet wheel quick lock of claim 5, wherein the handle further comprises a locking wrench and an elastic component, the handle is hollow, the handle is communicated with the sleeve, a clamping gear is contained in the sleeve, the clamping gear is fixedly connected to one end of the lock rod, the elastic component is connected with the locking wrench and the handle, under the action of the elastic component, the locking wrench is abutted to the clamping gear to limit the rotation of the handle relative to the lock rod, and when the locking wrench is pressed, the locking wrench is released from being abutted to the clamping gear to enable the handle to rotate relative to the lock rod.

7. The ratchet wheel quick lock according to claim 6, wherein the elastic member is a torsion spring, a support column is provided on the inner wall of the handle, and the torsion spring and the locking wrench are sequentially sleeved on the support column; the handle further comprises a bottom cover, and the bottom cover is in threaded connection with the supporting column.

8. An LED display screen, characterized in that, the LED display screen includes the ratchet wheel quick lock of any one of claims 1-7.

9. The LED display screen of claim 8, wherein the LED display screen comprises a plurality of LED unit boxes, and the lock seat and the lock plate of the ratchet wheel quick lock are respectively arranged on two adjacent LED unit boxes.

10. The LED display screen of claim 9, wherein the lock seat of the ratchet wheel quick lock is integrally connected with the LED unit box body;

or the lock seat of the ratchet wheel quick lock is detachably connected with the LED unit box body.

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