Device for quick splicing of a display screen

A device for quick splicing of a display screen is provided. The device includes a left assembly and a right assembly. The left assembly includes a rotation fixing seat, a rotation angle seat, a rotation locking mechanism, and a step angle-adjusting and clamping mechanism. The rotation angle seat can lock with the right assembly, and is rotatably connected to the rotation fixing seat. The rotation locking mechanism is disposed between the rotation fixing seat and the rotation angle seat. When the rotation locking mechanism is unlocked, the rotation angle seat can rotate relative to the rotation fixing seat; and when the rotation locking mechanism is locked, the rotation angle seat is fixedly connected to the rotation fixing seat. The step angle-adjusting and clamping mechanism is disposed between the rotation angle seat and the rotation fixing seat.

TECHNICAL FIELD

The present invention relates to a LED displaying technology field, in particular, to a device for quick splicing of a display screen.

BACKGROUND

Generally, a LED display is formed by splicing a plurality of display screen unit cases or display unit cases. With the development of technology and the improvement of display accuracy, it requires not only a fast and convenient splicing for the screen, but also requires a higher precision, otherwise it will affect the display quality. Generally, the existing screen is spliced directly depend on the outline of the case, and subject to the accuracy of the present sheet metal processing equipment and the characteristics of sheet metal processing technology and other factors, it is difficult to guarantee the splicing spaces in a horizontal direction (x), vertical direction (y), and the front-rear direction (z) to be in an ideal state, generally the assembling error is often greater than 1 mm. Especially, for the high density pixel screen, the assembling error will directly lead to an obvious bright line or dark line on the position where the splicing line is located, causing a poor display effect. The shape of LED display screen is more diversified, in order to meet the requirements of the market, the shape of the screen is no longer flat, the screen needs to be spliced to form a outer arc, inner arc and wavy shapes, etc.

A device for quick splicing of a display screen being able to splice the arc screen is disclosed in the china patent application 201220463653.X, but the device for quick splicing of a display screen provides a stepless adjustment, in theory two pieces of screens can be spliced into a arbitrary angle within a certain angle, however actually during the specific operation of the application, an operator can not know which angle should the screen be spliced into, which leads to a trouble for the splicing process.

From what has been discussed above, the existing technology of device for quick splicing of a display screen can not achieve a step adjustment, which brings inconvenience to the splicing process, thus it needs to be improved.

SUMMARY

The present invention aims at providing a device for quick splicing of a display screen for splicing the arc screen quickly, to solve the problem that the screen can not be spliced into an arc screen conveniently and accurately.

To solve the above mentioned problem, the present invention provides the following technical solution:

A device for quick splicing of a display screen comprising a left assembly and a right assembly, the left assembly and the right assembly being lockable with each other, the left assembly comprising a rotation fixing seat, a rotation angle seat, and a rotation locking mechanism, the rotation angle seat being lockable with the right assembly, and being rotatably connected to the rotation fixing seat; the rotation locking mechanism being disposed between the rotation fixing seat and the rotation angle seat; when the rotation locking mechanism is unlocked, the rotation angle seat rotates relative to the rotation fixing seat; and when the rotation locking mechanism is locked, the rotation angle seat is fixedly connected to the rotation fixing seat. The device for quick splicing of a display screen further comprises a step angle-adjusting and clamping mechanism, the step angle-adjusting and clamping mechanism is disposed between the rotation angle seat and the rotation fixing seat.

In a preferred technical solution, the rotation angle seat is provided with a arc-shaped flange, and the rotation fixing seat is correspondingly provided with arc-shaped flange guiding slot, the arc-shaped flange is slidable in the arc-shaped flange guiding slot, such that the rotation fixing seat and the rotation angle seat are rotatable with respective to each other, the rotation locking mechanism comprises a locking plate and a locking driving mechanism, the rotation fixing seat is provided with a guide column, the locking plate is inserted by the guide column, through the guide column, the locking plate is slidably disposed on the rotation fixing seat; the step angle-adjusting and clamping mechanism comprises arc-shaped tooth portions disposed on the locking plate and accordingly disposed on the arc-shaped flange of the rotation angle seat; the locking driving mechanism drives the locking plate to approach to the rotation angle seat, such that the arc-shaped tooth portions of the locking plate and the rotation angle seat engage with each other to prevent the rotation fixing seat from rotating with respective to the rotation angle seat.

In a further preferred technical solution, the locking driving mechanism comprises: a set shaft, a locking spanner and a spiral curved surface disposed on the rotation fixing seat; one end of the set shaft is provided with a handgrip, the other end of the set shaft is provided with a spanner connecting hole; the locking spanner is connected to the set shaft through the spanner connecting hole, and the spiral curved surface is tangent to a cylinder surface of the locking spanner; after assembled, the spiral curved surface and the rotation fixing seat is arranged between the handgrip and the locking spanner, the locking spanner is moved to slide on the spiral curved surface thereby driving the locking plate to approach to the rotation angle seat so as to lock the rotation fixing seat and the rotation angle seat.

In a further preferred technical solution, the number of the guide column is three, and the guide columns are distributed as triangle.

In a preferred technical solution, the device for quick splicing of a display screen further comprises an angle indication mechanism indicating the relative rotation angle of the rotation fixing seat and the rotation angle seat, and the angle indication mechanism is disposed between the rotation fixing seat and the rotation angle seat.

In a further preferred technical solution, the angle indication mechanism comprises an angle pointer fixedly disposed on the rotation angle seat, and an angle reading disposed on an outer side curved surface of the arc-shaped flange guiding slot of the rotation fixing seat.

In a further preferred technical solution, the angle indication mechanism further comprises a plurality of pointer slot disposed on the outer side curved surface of the arc-shaped flange guiding slot, the pointer slot is disposed on one side of the angle reading and is corresponding to the scale of the angle reading, and the angle pointer is elastic angle pointer.

In a preferred technical solution, the left assembly further comprises a locking reset mechanism, when the locking reset mechanism unlocks the rotation locking mechanism, the rotation angle seat and the rotation fixing seat are disengaged automatically from each other and enter into a relative rotation state, the locking reset mechanism is disposed between the rotation angle seat and the rotation fixing seat.

In a preferred technical solution, the left assembly further comprises a rotation limiting mechanism restricting the rotation fixing seat and the rotation angle seat in a definite range, the rotation limiting mechanism is disposed between the rotation fixing seat and the rotation angle seat.

In a further preferred technical solution, the rotation limiting mechanism a limiting screw and a limiting groove respectively disposed on the rotation fixing seat and the rotation angle seat; when the rotation fixing seat rotates with respective to the rotation angle seat and reaches a limiting position, the limiting screw contacts with the limiting groove to define the limiting position that the rotation fixing seat can rotate with respective to the rotation angle seat.

In a preferred technical solution, the rotation angle seat is provided with a X-direction left positioning surface, and the X-direction left positioning surface is provided with a positioning column hole; the right assembly comprises a right seat body, a spanner, a drag hook, a positioning column; the right seat body is provided with a X-direction right positioning surface corresponding to the X-direction left positioning surface, and the X-direction right positioning surface is provided with a positioning column accommodating hole, the positioning column accommodating hole corresponds to the positioning column hole, one end of the spanner is rotatably connected to the right seat body; the positioning column is slidably accommodated in the positioning column accommodating hole; the drag hook and the positioning column are rotatably connected to a middle portion of the spanner; when the spanner is thrown, the drag hook hooks the left assembly and meanwhile the positioning column is inserted into the positioning column hole.

In a further preferred technical solution, the device for quick splicing of a display screen further comprises a safety mechanism, the safety mechanism is disclosed between a moving part and a stationary part of the right assembly; the moving part comprises the spanner, the drag hook and the positioning column, the stationary part comprises the right seat body.

In a further preferred technical solution, the safety mechanism comprises a safety buckle, a safety buckle reset member and a safety buckle rotation shaft; the safety buckle is rotatably disclosed on the right seat body through the safety buckle rotation shaft, the safety buckle reset member is a reset spring which sleeves the safety buckle rotation shaft and elastically act on the safety buckle and the right seat body; the safety buckle may lock the moving part and may remain the lock state under the action of the safety buckle reset member.

In a further preferred technical solution, the safety buckle comprises a clamp hook, and the spanner is correspondingly provided with a clamp hook hole for accommodating the clamp hook; and the safety buckle fastens the spanner through the clamp hook.

In a further preferred technical solution, the clamp hook comprises a guide slant. In a further preferred technical solution, the safety buckle comprises a pressing surface for pressing operation; when the pressing surface is pressed, the safety buckle can overcome the action of the reset spring to rotate about the safety buckle rotation shaft and then break away from the spanner.

In a preferred technical solution, the right assembly further comprises a positioning column connecting shaft, the positioning column comprises a positioning column body and a connecting piece fixedly connected with the positioning column body; the positioning column is rotatably connected to the spanner through the connecting piece and the positioning column connecting shaft, such that when the spanner is thrown, the drag hook hooks the left assembly and meanwhile the positioning column be inserted into the positioning column hole.

In a preferred technical solution, a front end of the positioning column body is provided with a conical surface that plays a guide role; the connecting piece is provided with a waist-shaped hole; and the positioning column connecting shaft rotatably connects the positioning column with the spanner through the waist-shaped hole.

In a preferred technical solution, the right assembly further comprises open state remaining member which make the right assembly keep the maximum open state when the drag hook doesn't hook the left assembly; the open state remaining member is disposed between the moving part and the stationary part of the right assembly; the moving part comprises the moving part comprises the spanner, the drag hook and the positioning column; and the stationary part comprises the right seat body.

In a further preferred technical solution, the open state remaining member is a tension spring which acts between the positioning column and the right seat body and pulls the positioning column to the right seat body to ensure that the positioning column doesn't protrude above the X-direction right positioning surface in the unlock state.

In a preferred technical solution, the quick splicing device of a display further comprises a guide mechanism; the right size and the left side of the right seat body respectively comprise a side wall. The guide mechanism comprises guide grooves disposed on the side walls and guide pins disposed on the two sides of the drag hook; the guide pin is arranged in the guide groove and is slidable along the guide groove.

In a further preferred technical solution, the guide pin and the drag are formed in a whole, and an upper side of the guide groove is provided with a mounting gap facilitating mounting the guide pin to the guide groove.

In a further preferred technical solution, the left assembly further comprises a locking column, the locking column is disposed on the rotation angle seat; and the drag hook hooks the left assembly by hooking the locking column.

The beneficial effect of the present invention is that:

Owing to the step angle-adjusting and clamping mechanism, the step adjustment of a splicing angle may be realized, an operator is preinformed what is the angle value to be spliced, thus facilitating splicing.

The present invention is described in detail below with reference to the drawings.

DETAILED DESCRIPTION

The purpose of the present invention is to provide a device for quick splicing of a display screen that can splice an arc display screen quickly without any tool but can achieve a high precision splicing effect. And this device for quick splicing of a display screen can be manufactured on a large scale and is especially suitable for the splicing of the display screen which has high density pixels and needs to be assembled and disassembled frequently.

FIG. 1is a reference view of the state in use of a device for quick splicing a display screen according to a specific embodiment of the present invention. The device for quick splicing a display screen is disposed between two display units1(or display unit cases), for quick fixing and connecting the two adjacent display units1. FromFIG. 1it can be seen that a certain angle exists between two adjacent display units1through the device for quick splicing a display screen, thereby forming an arc screen. Referring toFIG. 2toFIG. 5, the device for quick splicing a display screen comprises a left assembly as shown inFIG. 6 or 7and a right assembly as shown inFIG. 15, the left assembly and the right assembly are lockable with each other. After assembled, the left assembly2and the right assembly3are respectively fixedly connected to one display unit, and then the right assembly3is locked with the left assembly2, such that the two display units are spliced together. The unlock states are shown inFIG. 3andFIG. 5, and the lock states are shown inFIG. 2andFIG. 4. According to the size of the display unit1and other specific situations, as shown inFIG. 1, two devices for quick splicing a display screen may be disposed between two adjacent display units1. In other embodiment, only one device for quick splicing a display screen or more than two divides for quick splicing a display screen may be arranged.

The specific structure of the left assembly2is shown inFIGS. 6, 7 and 8. The left assembly2comprises a rotation fixing seat22, a rotation angle seat20and a rotation locking mechanism. The rotation angle seat20is provided with a locking column21, and the rotation angle seat20is locked with the right assembly3through the locking column21. The rotation angle seat20is rotatably connected to the rotation fixing seat22. When the rotation locking mechanism is unlocked, the rotation angle seat20rotates with respective to the rotation fixing seat22; and when the rotation locking mechanism is locked, the rotation angle seat20is fixedly connected to the rotation fixing seat22.

The specific structure of the rotation angle seat20is shown inFIG. 9andFIG. 10, the front side of the rotation angle seat20has an X-direction left positioning surface200, and the X-direction left positioning surface200defines a positioning column hole201. As shown inFIG. 9orFIG. 10, the rotation angle seat20is provided with an arc shaped flange203. As shown inFIG. 11, the rotation fixing seat11is correspondingly provided with an arc-shaped flange guiding slot227, the arc-shaped flange203is slidable in the arc-shaped flange guiding slot227, such that the rotation fixing seat22and the arc-shaped flange guiding slot20can be rotated with respective to each other.

As shown inFIG. 7andFIG. 8, the rotation locking mechanism comprises a locking plate23, a set shaft26and a locking spanner28. As shown inFIG. 11, the rotation fixing seat22is provided with three guide columns225, and the three guide columns are distributed as a triangle. The device for quick splicing a display screen further comprises a step angle-adjusting and clamping mechanism, the step angle-adjusting and clamping mechanism is disposed between the rotation angle seat20and the locking plate23. The step angle-adjusting and clamping mechanism comprises arc-shaped tooth portions231and206respectively disposed on the locking plate23and the arc-shaped flange203of the rotation angle seat20; the locking driving mechanism may drive the locking plate23to approach to the rotation angle seat20, such that the arc-shaped tooth portions231and206of the locking plate and the rotation angle seat engage with each other to prevent the rotation fixing seat22from rotating with respective to the rotation angle seat20.

A display screen may be spliced quickly without any tool by using the device for quick splicing a display screen of the present invention. And through the innovative structure design that transfers the contact parts, the damage caused by the squeeze of two adjacent display units may be prevented. More importantly, the main parts may be manufactured through the die casting process cooperated with the machining process. The contact parts for assembly are precisely machined and are applied by a processing technology control, the manufacturing precision of the contact parts may be within 0.02 mm. After assembled, the total error may be controlled to be within the range of 0.1 mm, which improves the splicing precision by one order of magnitude, and can achieve an ideal effect of splicing, thereby achieving accurate assembly and locking, to adapt to the display application of high density of pixels. In the specific embodiment of the device for quick splicing a display screen, owing to the step angle-adjusting and clamping mechanism, the step adjustment of a splicing angle may be realized, an operator can be preinformed what is the angle value to be spliced, thus facilitating splicing.

As shownFIG. 13, the locking plate23accordingly defines three guide column holes232. Through the guide column hole232, the locking plate23may be slidably disposed on the guide column225of the rotation fixing seat22. And as shown inFIG. 13, the locking plate23is provided with the arc-shaped tooth portion231, the indexing angle of each tooth of the arc-shaped tooth portion231corresponds to the angle of one step rotation of the angle seat20. In a preferred technical solution, the indexing angle of each tooth is 2.5 degrees, the angle adjusting range is between plus and minus 7.5 degrees. Each tooth may index any other angle according to the design need. As shown inFIG. 10, the arc-shaped flange203of the rotation angle seat20is correspondingly provided with the arc-shaped tooth portion206matched with the arc-shaped tooth portion231, the indexing angle of each tooth of the arc-shaped tooth portion206is also 2.5 degrees.

As shown inFIG. 14, one end of an set shaft26is provided with a larger handgrip262to prevent the set shaft26from escaping from the set shaft hole233of the locking plate23; the other end of the set shaft26defines a spanner connecting hole261for connecting to the locking spanner28. An axis of the spanner connecting hole261is perpendicular to an axis of the set shaft26, the locking spanner28may be thrown to make the set shaft26rotate about the axis thereof. It should be noted especially that rotating the set shaft26isn't the final purpose, the set shaft26is rotated to make the locking plate23lock the rotation angle seat20and the rotation fixing seat22, such that the rotation angle seat20can't be rotated with respective to the rotation fixing seat22. For that purpose, as shown inFIG. 6 or 12, a spiral curved surface229is arranged on a part of the rotation fixing seat22close to the set shaft hole228, and the spiral curved surface229is tangent to a cylinder surface282of the locking spanner28. Thus when the locking spanner28is thrown, under the drive of the elevating force from the spiral curved surface229, the locking plate23is driven to approach to the rotation fixing seat22, the locking plate231of the locking plate23engages with the arc-shaped tooth portion206of the rotation angle seat20, such that the rotation fixing seat22can't be rotated with respective to the rotation angle seat20. Such that the rotation angle seat20is fixedly connected to the rotation fixing seat22.

A specific embodiment is shown inFIGS. 7 and 8, the left assembly2further comprises an angle indication mechanism indicating the relative rotation angle of the rotation fixing seat22and the rotation angle seat20, and the angle indication mechanism is disposed between the rotation fixing seat22and the rotation angle seat20. The angle indication mechanism comprises an angle pointer25, a plurality of pointer slots221disposed on an outer side curved surface223of the arc-shaped flange guiding slot227of the rotation fixing seat22and limiting the angle of each step, and a corresponding angle reading222disposed on one side of the pointer slot221. An angle indicating spring25is fixedly mounted on the rotation angle seat20, and in this specific embodiment an elastic angle pointer25is used. When the locking plate23is released through the locking spanner28, the rotation angle seat20may be rotated with respective to the rotation fixing seat22, then the angle pointer25may be slid on the outer side curved surface223and drop in respective pointer slot221, thereby indicating the angle of rotation under the cooperation of the angle reading222. Because the angle pointer25has elasticity, when the rotation angle seat20is rotated with respective to the rotation fixing seat22, if the rotation angle seat20is rotated one step, the angle pointer25is slid from one pointer slot221to another pointer slot221, and makes a “click” sound, which can help the operator to determine the rotation angle without reading the angle reading222in poor light environment, and the operating feel is better.

A further preferred technical solution is shown inFIG. 7andFIG. 8, the angle indication mechanism further comprises a pointer backplate27, the pointer backplate27is fixedly disposed on the rotation fixing seat22and is on the outer side of the angle pointer25. A protection space for accommodating the angle pointer25is formed between the pointer backplate27and the rotation fixing seat22, and prevents an outside object from contacting the angle pointer25and causing damage or causing that the angle pointer25can't indicate the rotation angle correctly.

The left assembly2further comprises a locking reset mechanism configured for making the rotation angle seat20and the rotation fixing seat22disengage automatically from each other and enter into a relative rotation state when the rotation locking mechanism is unlocked, the locking reset mechanism is disposed between the locking plate23and the rotation fixing seat22. In this specific embodiment, the locking reset mechanism is an elastic reset member disposed between the rotation fixing seat22and the locking plate23. When the rotation locking mechanism is locked, the elastic reset member is compressed between the rotation fixing seat22and the locking plate23. Referring toFIGS. 8, 4 and 5, more specifically, the elastic reset member is a rubber spring29made of elastic rubber. FromFIG. 11, it can be seen that a rubber spring accommodating hole226is defined near the guide column225. After assembled, the rubber spring29is in the rubber spring accommodating hole226with a part extending outwards from the rubber spring accommodating hole226. When the locking spanner28is thrown, under the drive of the elevating force from the spiral curved surface229of the rotation fixing seat22, the rubber spring29is compressed after the locking plate23is locked through the set shaft26. After the locking bolt26is released, the locking plate23escapes from the rotation angle seat20due to the recovering of the rubber spring29. A normal metal spring may be used to replace the rubber spring29, which can basically achieve the same technical effect.

FormFIGS. 8, 9, 11, 4 and 5, it can be seen that the left assembly further comprises a rotation limiting mechanism configured for restricting the rotation fixing seat and the rotation angle seat in a definite range, the rotation limiting mechanism is disposed between the rotation fixing seat22and the rotation angle seat20. The rotation limiting mechanism comprises a limiting screw24disposed in an limiting screw hole209in the rotation fixing seat20and a limiting groove224disposed on the rotation fixing seat22. When the rotation fixing seat22rotates with respective to the rotation angle seat20and reaches a limiting position, the limiting screw24contacts with the end of the limiting groove224to define the limiting position that the rotation fixing seat22can rotate with respective to the rotation angle seat20.

Referring toFIGS. 15, 4 and 5, the right assembly3comprises a right seat body30, a spanner31, a drag hook32, a spanner rotation shaft34, a drag hook rotation shaft35, a positioning column37, a positioning column connecting shaft38and so on.

The specific structure of the right seat body30is shown inFIG. 16, the front side of the right seat body is provided with an X-direction right positioning surface300corresponding to the X-direction left positioning surface200, and the X-direction right positioning surface300defines a positioning column accommodating hole303accommodating the positioning column37. The position of positioning column accommodating hole303corresponds to the positioning column hole201. The right side and the left side of the right seat body30respectively comprise a side wall301. Each side wall301defines a guide groove302, a spanner rotation shaft hole304and a safety buckle rotation shaft hole305. The bottom of the right seat body30defines a plurality of mounting holes306configured to be fixedly connected to the display unit1through a bolt.

As shown inFIG. 18, one end of the spanner31is provided with a handgrip311, the operator applies force through the handgrip311, the other end of the spanner31defines a spanner rotation shaft mounting hole315to be inserted by the spanner rotation shaft34. As shown inFIGS. 4 and 5, the spanner31is rotatably mounted to the spanner rotation shaft holes304on the two side walls301of the right seat body30by inserting the spanner rotation shaft34into spanner rotation shaft mounting hole315.

As shown inFIGS. 4 and 5, one end of the drag hook is rotatably connected to the spanner31through the drag hook rotation shaft35. Specifically, a drag hook rotation shaft hole316is defined between the handgrip311and the spanner rotation mounting hole315. The specific structure of the drag hook32is shown inFIG. 16, one end of the drag hook32defines a drag hook rotation shaft mounting hole323. As shown inFIGS. 4 and 5, the drag hook32is rotatably connected to the spanner31by the drag hook rotation shaft35through the drag hook rotation shaft hole316and the drag hook rotation shaft mounting hole323.

As shown inFIG. 17, the other end of the drag hook32is provided with a hook320, the drag hook32can hook the locking column21through the hook320, such that the left assembly2and the right assembly3are connected together as shown inFIGS. 2 and 4.

As shown inFIGS. 4 and 5, the positioning column37may be slidably disposed in the right seat body30, and may be rotatably and slidably connected to the spanner31through the positioning column connecting shaft38. The specific structure of the positioning column37is shown inFIG. 19, the positioning column37comprises a positioning column body370and a connecting piece371fixedly connected to a rear end of the positioning column body370. Actually the connecting piece371and the positioning column body370may be formed in a whole, or may be connected together through welding. A front end of the positioning column body370is provided with a conical surface3701that plays a guide role. The connecting piece371is provided with a waist-shaped hole3711thereon and is connected to the spanner31through the positioning column connecting shaft38. As shown inFIG. 17, the front end of the spanner31is provided with a connecting piece accommodating groove312, such that a connecting wall313is respectively formed on the two sides of the connecting piece accommodating groove312, and the connecting wall313defines a positioning column connecting shaft hole314for mounting the positioning column connecting shaft38. After assembled, the positioning column37is in the positioning column accommodating hole303, and may be slid along the positioning column accommodating hole303under the drive from the spanner31. When the drag hook32hooks the locking column21, as shown inFIGS. 4 and 5, the positioning column is inserted into the positioning column hole201of the rotation angle seat21, thereby positioning the left assembly2and right assembly3in the y-direction and the z-direction.

The unlock state is shown inFIGS. 3 and 5, the spanner31is thrown through the handgrip311on one end of the spanner31, such that the spanner31is rotated about the axis of the spanner rotation shaft34, thereby generating a leverage effect, so as to generate a larger force to drive the drag hook32and the positioning column37to move, such that the hook320of the drag hook32hooks the locking column21of the rotation angle seat20. Meanwhile, the positioning column37is inserted into the positioning column hole201of the rotation angle seat20, thereby locking the left assembly1and the right assembly3. The lock state is shown inFIGS. 1 and 4. At that time, the X-direction left positioning surface200clings with the X-direction right positioning surface300, such that the left assembly2and the right assembly3are positioned in the X-direction. Or the spanner31is thrown in a reverse direction, then the drag hook32escapes from the locking column21, the positioning column37returns back into the right seat body30, such that the left assembly2escapes from right assembly3. The unlock state is shown inFIG. 3.

In conclusion, after the left assembly2and the right assembly3are locked, the left assembly2and the right assembly3are accurately positioned in the X-direction, Y-direction and Z-direction. And the left assembly2and the right assembly3are fixedly connected to two display units1respectively, such that the accurate positioning and reliable connection between two adjacent display units may be achieve. And the connection may be operated through the spanner31, which can achieve the quick assembly and the disassembly.

In a preferred technical solution, a guide mechanism is disposed between the drag hook32and the right seat body30, such that under the drive of the spanner31the drag hook32can keep stable by itself and moves with a good posture so as to hook the locking column21or escape from the locking column21. Specifically, when the drag hook32escapes from the locking column21, first the drag hook32moves to the left away from the locking column21, meanwhile the drag hook32has a motion of rising. After the drag hook32is separated from the locking column21completely, the drag hook moves to the right to reset.

In this specific embodiment, the guide mechanism comprises guide pins324disposed on the two sides of the drag hook32as show inFIG. 17and guide grooves302disposed on the two side walls301of the right seat body30as shown inFIGS. 15 and 16. When the drag hook32moves, the guide pin324slides in the guide groove302, thereby ensuring the motion posture of the drag hook32. The motion posture of the drag hook32mainly refers to the motion posture of the hook320on the front end of the drag hook32. As shown inFIG. 17, the middle part of the rear end of the drag hook32is emptied to form an avoidance notch322, two connecting arms321are naturally formed on the two sides of the avoidance notch322. After assembled, the spanner31is arranged in the avoidance notch322, and the avoidance notch322is rotatably connected to the spanner31through the drag hook rotation shaft mounting hole323.

As shown inFIGS. 3 and 15, in the preferred technical solution, the right assembly3further comprises a safety mechanism36, the safety mechanism36is disclosed between a moving part and a stationary part of the right assembly3. When the left assembly2is locked with the right assembly3, the safety mechanism36locks the moving part of the right assembly3, to prevent the left assembly2from escaping from the right assembly3under the action of outside factors, such that the lock state is more stable. The moving part mainly refers to the spanner31, drag hook32, positioning column37, positioning column connecting shaft38, drag hook rotation shaft35and other movable parts. The stationary part mainly refers to the right seat body30and the spanner rotation shaft34. In this specific embodiment, the spanner31is locked by the safety mechanism36. However, the drag hook32or the positioning column37may be locked to achieve the same effect. In this embodiment locking the spanner31is the most convenient, and the effect is the best.

As shown inFIGS. 3 and 15, the safety mechanism36of this specific embodiment comprises a safety buckle360, a safety buckle reset member361and a safety buckle rotation shaft362. The safety buckle360is rotatably arranged into the two safety buckle rotation shaft holes305of the right seat body30through the safety buckle rotation shaft362. In this specific embodiment, the safety buckle reset member361is a reset spring, the reset spring is disposed around the safety buckle rotation shaft362, and elastically acts between the safety buckle360and the right seat body30, such that the safety buckle360may clamp the spanner31when the left assembly2and the right assembly3are in the lock state, such that the left assembly2and the right assembly3are locked reliably.

The specific structure of the safety buckle360is shown inFIG. 20, a lower end of the safety buckle360defines a safety buckle rotation shaft mounting hole3601, an upper end of the safety buckle360is provided with a clamp hook3602. The clamp hook3602of the safety buckle360locks the spanner31. As shown inFIG. 17, the middle portion of the spanner31defines a clamping hook hole317corresponding to the clamping hook3602of the safety buckle360. The clamping hook3602comprises a guide slant3603, such that when the right assembly3and the left assembly2are in the lock state, the clamp hook3602hooks the spanner31and enters the safety state.

In a further preferred technical, the safety buckle360comprises a pressing surface3604. If the safety state needs to be terminated, the pressing surface3604can be pressed, then the safety buckle360can overcome the action of the reset member361to rotate about the safety buckle rotation shaft362and the clamp hook3602breaks away from the spanner31, therefore the safety state may be terminated easily.

The further preferred technical solution is shown inFIG. 4andFIG. 5. The device for quick splicing of a display screen further comprises an open state remaining member39. The open state remaining member39is also disposed between the moving part and the stationary part of the right assembly3. The open state remaining member39can make the right assembly3be kept in the maximum open state when the drag hook32doesn't hook the locking column21, this is to ensure that the positioning column37returns back to the right seat body30completely, in order to avoid affecting the right assembly3approaching to the left assembly2. After the right assembly3and the display unit fixedly connected to the right assembly3get close to the left assembly2and the corresponding display unit, and the X-direction left positioning surface200correspondingly contacts the X-direction right positioning surface300, the two display units may be locked together only by pressing the handgrip311of the spanner311, the operation is very convenient.

In this specific embodiment, the open state remaining member39is a tension spring which is stretched to act between the positioning column37and the right seat body30and pulls the positioning column37into the right seat body30, to ensure that the positioning column37doesn't protrude above the X-direction right positioning surface300in the unlock state.

The device for quick splicing of a display screen of the present invention can splice the display screens together quickly without any tool, and thus can be flexible to adapt to various application situations. And the main parts, comprising the rotation angle seat21, right seat body30, drag hook32, spanner31and safety buckle360, may be manufactured through the die casting process cooperated with the machining process, and the manufacturing precision of the contact parts may be within 0.02 mm. And through the innovative structure design that transfers the contact parts, the damage caused by the squeeze of two adjacent display units may be prevented, which is adapted to the display application of high density of pixels. The contact parts for assembly is precisely machined and is applied a processing technology control, the ideal effect of splicing can be achieved. After assembled, the total error may be controlled to be within the range of 0.1 mm, which improves the splicing precision by one order of magnitude, thereby achieving quick and accurate assembly and locking.

The above content is to explain the prevent invention further with reference to the specific preferred embodiment, it can't be determined the specific embodiment of the prevent invention is only limited to these illustrations. Some simple deductions or replacements made by those ordinary skilled person in the art without escaping from the conception of the prevent invention, should be regarded as falling into the protection scope of the present invention.