CN111338170A

CN111338170A - Screen frame and laser projection display device

Info

Publication number: CN111338170A
Application number: CN201811556774.7A
Authority: CN
Inventors: 陈波; 黄永达; 赵飞
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2020-06-26
Anticipated expiration: 2038-12-19
Also published as: CN111338170B

Abstract

The invention provides a screen frame and a laser projection display device. The screen frame comprises a plurality of side frames which are connected end to end, wherein a plurality of connecting pieces are arranged at the joint of every two adjacent side frames, accommodating grooves which correspond to the connecting pieces one by one are formed in the joints of the side frames and the adjacent side frames, each connecting piece is provided with an inserting part which can extend into the accommodating grooves, each inserting part is provided with a telescopic clamping piece, and accommodating holes corresponding to the clamping pieces are formed in the wall of each accommodating groove; the clamping piece is used for extending into the accommodating hole to realize positioning; and the insertion part is connected with the side wall of the accommodating groove through the fastening piece, so that the relative positions of the connecting piece and the side frame can be quickly positioned, and the installation efficiency is improved.

Description

Screen frame and laser projection display device

Technical Field

The invention relates to the field of displays, in particular to a screen frame and a laser projection display device.

Background

With the continuous development of science and technology and the improvement of the living standard of people, the novel laser projection display device is more and more widely applied.

Currently, among laser projection screens, a frame-type screen has the advantages of light weight, low cost, convenience in assembly and the like, so that the laser projection screen is widely applied. Wherein, the frame-type screen is formed by splicing a plurality of side frames. Fig. 1 is a schematic structural diagram of a frame type screen in the prior art. As shown in fig. 1, when the side frames 10 are connected in a splicing manner, two side frames 10 corresponding to two adjacent sides of the screen are connected by corner connectors 20. Specifically, the corner connecting member 20 has two extending portions 201 that form a right angle with each other, a sliding groove (not shown in the figure) is provided at the joint of the side frames 10, one extending portion 201 of the corner connecting member 20 can extend into the sliding groove of one of the side frames 10, and the other extending portion 201 extends into the sliding groove of the side frame 10 in the other direction, correspondingly, connecting holes (through holes) are provided on the side frames 10 and the extending portions 201 of the connecting member 20, after the extending portions 201 extend into the corresponding sliding grooves, the connecting holes are aligned correspondingly by visual observation, and then fastening members such as screws are sequentially inserted into the through hole connecting holes for locking, so that the corner connecting member 20 and the side frames 10 are connected together, and the assembly between the side frames is completed.

However, on one hand, when aligning the side frame 20 and the through hole connection holes formed on the protruding portion 201, it is often necessary to try many times to achieve accurate alignment, and after the alignment, the relative position is kept unchanged, for example, the state that the connecting member extends into the sliding slot at this time is kept until the fastening member is fixed, on the other hand, in order to make the corner connecting member 20 and the side frame 10 assembled more firmly, it is necessary to provide many pairs of connection holes, and thus it is necessary to repeat the above-mentioned installation process many times, which makes the installation efficiency of the frame-type screen very low, generally, the installation of one above-mentioned screen frame requires two persons to match for about 100 minutes, the user experience is poor, and it is very unfavorable for implementing the user's autonomous installation.

Disclosure of Invention

The invention provides a screen frame and a laser projection display device, which can be used for easily and accurately aligning and splicing.

On one hand, the invention provides a screen frame, which comprises a plurality of side frames connected end to end, wherein a connecting piece is arranged at the joint of two adjacent side frames, a containing groove corresponding to the connecting piece one by one is formed at the joint of the side frames and the adjacent side frames, the connecting piece is provided with an inserting part which can extend into the containing groove, the inserting part is provided with a telescopic clamping piece, and the groove wall of the containing groove is provided with a containing hole corresponding to the clamping piece; the clamping piece is used for extending into the accommodating hole to realize positioning; and the insertion part is connected with the side wall of the containing groove through the fastening piece.

In another aspect, the present invention provides a laser projection display device, which includes a projection host, a projection screen, and a screen frame as described above, where the screen frame is disposed around the projection screen.

According to the screen frame provided by the technical scheme, the side frames are provided with the accommodating grooves, the inserting parts of the connecting pieces are connected with the side walls of the accommodating grooves through the fasteners, the inserting parts of the connecting pieces are provided with the telescopic clamping pieces, correspondingly, the groove walls of the accommodating grooves are also provided with the accommodating holes, so that when the connecting pieces are fixedly connected with the side frames, the clamping pieces of the inserting parts are clamped and limited with the accommodating holes in the groove walls of the accommodating grooves, the positioning of the relative positions of the connecting pieces and the side frames can be quickly realized, the mounting efficiency is improved, personnel without assembly experience can easily complete the assembly work of the screen frame, the free assembly of the screen frame is facilitated for users, and the assembly cost is saved.

According to the laser projection display device provided by the technical scheme of the invention, the screen frame of the scheme is applied, the multi-section frame can be rapidly installed, the installation efficiency is higher, and the product experience of a user can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a frame-type screen according to the prior art;

fig. 2a is a schematic structural diagram of a screen frame according to an embodiment of the present invention;

FIG. 2b is an exploded view of a screen frame according to an embodiment of the present invention;

FIG. 3a is a schematic diagram illustrating a connection position of two adjacent side frames in a screen frame according to an embodiment of the present invention;

FIG. 3b is an exploded view of a connection position between two adjacent side frames of the screen frame according to an embodiment of the present invention;

fig. 4a and 4b are schematic views of a connection structure between a connection member and a side frame in a screen frame according to an embodiment of the present invention;

fig. 5a and 5b are schematic structural diagrams of a first connecting member in a screen frame according to an embodiment of the present invention;

fig. 6a and 6b are schematic structural diagrams of different second connecting members in a screen frame according to an embodiment of the present invention;

fig. 7 is a schematic view illustrating a connection structure between a fastening member and a side frame of a screen frame according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a laser projection display device according to a second embodiment of the present invention.

Description of reference numerals:

1. 1a, 1b, 10-side frame; 20-corner connectors; 2, connecting pieces; 2a — a first connecting member; 2 b-a second connector; 11-a receiving groove; 12-a containment hole; 13. 14, 23, 24-connecting holes; 33. 34-a fastener; 21. 21a, 21 b-a plug-in part; 20b, 23a, 23 b-connection hole; 22-a snap-fit member; 25-reinforcing ribs; 201 — an extension; 221-a clamping end; 251-a limiting surface; 300-laser projection display device; 301-projection screen; 302-screen frame; 303 — laser projection host.

Detailed Description

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

Example one

Fig. 2a is a schematic structural diagram of a screen frame assembly according to an embodiment of the present invention. Fig. 2b is an exploded view of a screen frame according to an embodiment of the present invention. Fig. 3a is a schematic diagram illustrating a connection position of two adjacent side frames in a screen frame according to an embodiment of the present invention. Fig. 3b is an exploded view of a connection position of two adjacent side frames in the screen frame according to an embodiment of the present invention. Fig. 4a and 4b are schematic views of a connection structure between a connection member and a side frame in a screen frame according to an embodiment of the present invention. Fig. 5a and 5b are schematic structural diagrams of a first connecting member in a screen frame according to an embodiment of the present invention. Fig. 6a and 6b are schematic structural diagrams of a second connecting member in a screen frame according to an embodiment of the present invention. Fig. 7 is a schematic view illustrating a connection structure between the engaging member and the side frame of the screen frame according to an embodiment of the invention.

Referring to the partial schematic view of one corner connection of the screen frame shown in fig. 3a to 4b, the screen frame provided in this embodiment includes a plurality of side frames 1 connected end to end, a connecting member 2 is disposed at a joint of two adjacent side frames 1, the connecting member 2 is connected between two adjacent side frames, for example, the side frame 1a and the side frame 1b, and the connecting member 2 is connected to the side frames 1 through a fastening member (not shown in the figure).

When the connecting members 2 are used to connect two adjacent side frames 1, the connecting members 2 and the side frames 1 may have various connecting structures and connecting manners. In order to prevent the connecting member 2 from affecting the overall appearance of the screen frame, the side frame 1 may be used to shield or accommodate the connecting member 2, so as to prevent the connecting member 2 from being exposed. In one optional connection structure, a joint of the side frame 1 and the adjacent side frame is provided with a containing groove 11 corresponding to the connecting piece 2 one by one, the depth direction of the containing groove 11 is along the length direction of the side frame 1, the connecting piece 2 is provided with an inserting part 21 capable of extending into the containing groove 11, and the fastening piece 3 passes through the groove wall of the containing groove 11 and the inserting part 21 so as to connect the connecting piece 2 and the side frame 1.

As shown in fig. 4a and 4b, the inserting portion 21 is provided with a retractable engaging member 22, and as shown in fig. 7, a groove wall of the accommodating groove 11 is provided with an accommodating hole 12 corresponding to the engaging member, and the engaging member 22 can extend into and be engaged with the accommodating hole 12, thereby achieving the positioning and limiting function. When assembling, the engaging member 22 extends into the receiving groove 11 along with the inserting portion 21, because the engaging member 22 is retractable, before entering the receiving hole 12, the engaging member 22 is in a forced compressed state, and when reaching the position of the receiving hole 12, the engaging member 22 is sprung up to enter the receiving hole 12, and the receiving hole 12 limits the engaging member 22 at the position.

Specifically, the accommodating groove 11 is located at an end portion of the side frame 1, which is in butt joint with an adjacent side frame, and an opening of the accommodating groove 11 may be located on an end surface of the side frame 1, which is used for butt joint with the adjacent side frame. At this time, the insertion part 21 of the connecting member 2 may extend toward the end of the side frame 1 and be inserted into the receiving groove 11 through the opening of the receiving groove 11. The connecting member 2 is received and hidden in the receiving groove 11 when viewed from the outside of the screen frame, so that the screen frame has a simple and beautiful appearance. And because the inserting part 21 is positioned in the accommodating groove 11, the fastening piece can be arranged on the groove wall of the accommodating groove 11 and the inserting part 21 in a penetrating way, and the connecting piece 2 and the side frame 1 are connected together. Specifically, the groove wall of the accommodating groove 11 and the surface of the insertion part 21 opposite to the groove wall may be provided with connecting holes for passing fasteners. After the connecting piece 2 and the side frame 1 are installed in place, the positions of the connecting hole of the accommodating groove 11 and the connecting hole of the inserting part 21 are overlapped, and at the moment, the fastening piece can penetrate through the connecting hole to be connected. When the fastening member is a threaded connector, one of the connection hole of the accommodation groove 11 and the connection hole of the insertion part 21 may be a smooth hole, and the other may be a threaded hole.

At this time, since the connection member 2 is built in the side frame 1, the joint of the two side frames 1a and 1b may have shapes matched with each other, which can form a neat and beautiful screen frame appearance.

In the screen frame that above-mentioned embodiment provided, the storage tank has been seted up on the side frame, the grafting portion of connecting piece is connected with the lateral wall accessible fastener of storage tank, and, the grafting portion of connecting piece is provided with the telescopic fastener, correspondingly, the holding hole has still been seted up to the cell wall of storage tank, therefore, when realizing that connecting piece and side frame carry out fixed connection, the fastener of grafting portion carries out the block with the holding hole on the cell wall of storage tank spacing, the location of the relative position of realization connecting piece and side frame that can be quick, thereby improve the installation effectiveness, make the personnel who do not possess the assembly experience also can be comparatively easy completion screen frame's fitting work, thereby the user of being convenient for carries out screen frame freely equipment, save the assembly cost.

And, further, as shown in fig. 3b, the plurality of connectors 2 may be four connectors respectively disposed at the junctions of the four corners of the rectangular frame of the screen.

Or specifically, a first connecting piece 2a and a second connecting piece 2b are included, wherein the first connecting piece 2a and the second connecting piece 2b are arranged along a diagonal line of the screen frame, and the first connecting piece 2a is positioned at the outer side of the second connecting piece 2 b.

When two adjacent side frames are connected through the connecting piece 2, the connecting piece 2 needs to keep a proper relative position with the side frame 1 to be correctly connected and assembled. In order to ensure accurate positioning between the connecting piece 2 and the side frame 1, the connecting piece 2 is provided with the inserting part 21, the side frame 1 is provided with the accommodating groove 11, and the connecting piece 2 and the side frame 1 are mutually matched with the accommodating groove 11 through the inserting part 21 to realize connection, as an optional implementation mode, the first connecting piece 2a or the second connecting piece 2b can be provided with the clamping piece 22 capable of stretching out and drawing back, the clamping piece 22 comprises a clamping end 221 capable of extending out the outer surface of the inserting part 21, the side frame 1 is provided with the accommodating hole 12 corresponding to the clamping piece, the clamping end 221 extends into and is clamped in the accommodating hole 12, and therefore positioning of the accommodating hole 12 is achieved.

Specifically, the first connecting member 2a may have a structure as shown in fig. 5a, or may have a structure as shown in fig. 5b, the first connecting member 2a is further provided with an engaging member 22, and in a specific implementation, the engaging members 22 are respectively disposed on the two insertion portions 21a of the first connecting member 2a and are disposed near the corner of the first connecting portion.

And, as shown in fig. 6a, an engaging piece 22 is provided on the second connector 2 b. Specifically, the engaging members 22 are also provided in plurality and are disposed on two insertion portions of the second connecting member.

As described above, the engaging piece 22 may be provided only on the first link 2a, only on the second link 2b, or both the first link 2a and the second link 2b may be provided with the engaging piece 22. In this embodiment, the second connecting member 2b has a thicker thickness in a direction perpendicular to the plane of the screen frame, so that there is a larger space in this direction for disposing the engaging member 22, and therefore, the embodiment will be described by taking the example that the engaging member 22 is disposed on the second connecting member 2 b.

In order to allow the insertion portion 21 to be inserted into the accommodating groove 11 at a proper position, the engaging member 22 itself includes a spring or other elastic member, so that a part of the engaging member 22, for example, the engaging end 221, can be protruded from the outer surface of the insertion portion 21 under the elastic action. Correspondingly, the side frame 1 is provided with a containing hole 12 corresponding to the inserting part 21. When the insertion part 21 of the connecting member 2 extends into the correct position in the receiving groove 11, the positions of the receiving hole 12 of the side frame 1 and the engaging member 22 of the insertion part 21 are overlapped.

In the process of inserting the insertion-fit portion 21 into the receiving groove 11, since the insertion-fit portion 21 of the connector 2 has a shape that matches the inner wall of the receiving groove 11, the outer wall of the insertion-fit portion 21 and the inner wall of the receiving groove 11 are kept in close contact with each other or have a small gap. At this time, the engaging member 22 disposed on the inserting portion 21 abuts against the inner wall of the accommodating groove 11, and maintains the retracting state of the engaging end 221 under the action of its own elastic force and the pressure of the groove wall of the accommodating groove 11. When the inserting portion 21 continues to move in the receiving cavity 11 until the engaging member 22 is overlapped with the receiving hole 12 of the side frame 1, the engaging member 22 loses the constraint from the inner wall of the receiving cavity 11, and at this time, the locking end 221 can be ejected out toward the outer side of the outer surface of the inserting portion 21 under the action of its own elastic force and extend into the receiving hole 12. Therefore, the clamping end 221 can be clamped with the accommodating hole 12, when the inserting part 21 tends to move continuously into the accommodating hole 12, the clamping end 21 in the accommodating hole 12 can be abutted against the hole wall of the accommodating hole 12, so that the inserting part 21 is prevented from moving continuously, and the connecting part 2 and the side frame 1 can be accurately positioned. The accommodating hole 12 may be a through hole or the like.

One engaging piece 22 may be disposed on the insertion part 21, or a plurality of engaging pieces 22 arranged at intervals may be disposed on the insertion part 21, and the plurality of engaging pieces 22 are used to improve the installation accuracy between the accommodating groove 11 and the insertion part 21. The number of the engaging pieces 22 on the inserting portion 21 can be adjusted according to the size and specific structure of the screen frame, and is not limited herein.

In order to keep the engaging member 22 in the retracted state during the insertion of the inserting portion 21 into the receiving cavity 11 until the locking end of the engaging member 22 extends into the receiving hole 12, the engaging member 22 should have a telescopic direction different from the insertion direction of the inserting portion 21, for example, the telescopic direction of the engaging member 22 is perpendicular to the insertion direction of the inserting portion 21. Thus, when the inserting portion 21 is inserted into the receiving groove 11, the distance between the engaging member 22 and the inner wall of the receiving groove 11 is always kept constant, so that the engaging member 22 can be always kept in the retracted state before being overlapped with the receiving hole 11. Therefore, as an alternative embodiment, the engaging member 22 is located on a side wall of the insertion part 21, that is, a wall facing a direction different from the insertion direction of the insertion part 21, and the extending and contracting direction of the engaging member 22 and the side wall of the insertion part 21 are kept perpendicular to each other. In order to observe whether the engaging member 22 is clamped into the accommodating hole 12, the engaging member 22 is generally disposed perpendicular to the plane of the screen frame, that is, the engaging member 22 is located on a surface of the screen frame facing the screen or facing away from the screen, so that after the engaging member 22 enters the accommodating hole 12, a user can easily observe whether the engaging member 22 is clamped from the outer side surface of the screen frame.

The side wall of the insertion part 21 is generally parallel to the insertion direction of the insertion part 21, so as to facilitate the insertion of the insertion part 21. Therefore, when the extending/contracting direction of the engaging piece 22 is kept perpendicular to the side wall of the socket part 21, the engaging piece is also kept perpendicular to the inserting direction of the socket part 21. At this time, the movement of the insertion part 21 does not affect the telescopic state of the engaging piece 22, so that the operation of the engaging piece 22 is reliable.

In order to facilitate the engaging member 22 to be smoothly inserted into the accommodating hole 12, as an alternative embodiment, the engaging end 221 of the engaging member 22 may be an arc-shaped end. At this time, in the process that the clamping end 221 enters the accommodating hole 12, the arc-shaped appearance of the clamping end 221 can effectively reduce the resistance and the friction between the clamping end 221 and the edge of the accommodating hole 12 on one hand; on the other hand, when the engaging end 221 abuts against the edge region of the accommodating hole 12, the arc-shaped engaging end 221 can also convert the elastic force of the engaging member 22 into a component force toward the accommodating hole 12, and at this time, under the action of the component force, the engaging end 221 can be automatically ejected toward the accommodating hole 12, and the inserting portion 21 is correspondingly driven to the correct positioning position.

The engaging member 22 may have various structures and forms in order to extend and retract the engaging member 22 and engage with the accommodating hole 12. In one alternative, the catch 22 may be a spring loaded plunger. The spring plunger is also called as a ball plunger, and an elastic member such as a spring is arranged in the spring plunger, so that the telescopic operation of the plunger can be realized by the elasticity of the elastic member such as the spring.

When the clamping piece 22 is a spring plunger, because the inside of the spring plunger is of a metal structure, when the clamping end 221 of the spring plunger extends into the accommodating hole 12 and is clamped with the accommodating hole 12, the clamping end 221 of the spring plunger can generate crisp touch sound due to the touch between the clamping end 221 and the side frame 1, and a user can know that the side frame 1 and the connecting piece 2 are installed in place after hearing the touch sound, so that the assembling and positioning accuracy is ensured, and the installation difficulty is reduced.

When the engaging member 22 is a spring plunger, a mounting hole or a mounting groove may be formed in the insertion portion 21 of the connecting member 2, and the spring plunger is mounted in the mounting hole or the mounting groove through interference fit or mounting threads, at this time, most of the structure of the spring plunger is buried in the mounting hole or the mounting groove, and the engaging end 221 may protrude out of the outer surface of the insertion portion 21 in an extending state and is engaged with the accommodating hole 12.

The penetrating direction of the fastening piece on the first connecting piece 2a is perpendicular to the plane of the screen frame, and the penetrating direction of the fastening piece on the second connecting piece 2b is parallel to the plane of the screen frame.

And when the first connecting member 2a is provided with the engaging member 22, the extending and retracting direction of the engaging member 22 may be the same as the penetrating direction of the fastening member on the first connecting member 2a, and the engaging member is arranged away from the extending direction of the inserting portion 21.

And, when the engaging piece 22 is provided on the second connecting member 2b, the extending and contracting direction of the engaging piece 22 is perpendicular to the penetrating direction of the fastening piece on the second connecting member 2 b. See fig. 6b, fig. 6 a. The engaging member 22 and the connecting hole 23b of the connecting member 2b are respectively disposed on different surfaces of the sidewall of the insertion part, specifically, perpendicular to each other.

And, in one embodiment, the screen frame is mounted by laying the screen frame flat on the console or on the ground, such that the back of the screen frame faces the installer, and in order for the user to have a more intuitive view of the connectors when inserting the side frame receiving slots, the receiving holes of the side walls of the receiving slots are disposed towards the back of the screen frame, i.e., facing the direction of the installer. Thus, the installer can easily see the top of the engaging piece from the accommodating hole.

And, referring to fig. 2a to fig. 7, specifically, the screen frame is a generally rectangular frame structure, and the side frames 2 correspond to directions of four sides of the screen frame, and the number of the side frames 2 may be generally four. Therefore, the four side frames 2 are connected end to form a rectangular screen frame. At this time, two adjacent side frames, for example, the side frame 1a and the side frame 1b correspond to two adjacent sides of the rectangle, respectively. Thus, the joint of each two adjacent side frames corresponds to a corner position of the screen frame, and the connecting piece 2 is arranged at the corner position and connects the two side frames 1a and 1 b.

In order to connect the two adjacent side frames 1a and 1b, the number of the connecting members 2 may be two, and each connecting member is located between the two adjacent side frames, i.e., the side frame 1a and the side frame 1b, and connects and fixes the two side frames 1a and 1b together by a fastening member (not shown in the figure). Specifically, each connecting member 2 has connecting portions correspondingly connected to different side frames, and the connecting portions and the side frames 1 have a partial or full overlapping area, so that the connecting portions and the side frames 1 can be connected.

Since the connecting portions of the connecting members 2 are partially or completely overlapped with the side frames 1, in order to complete the fixing of the side frames 1, the fastening members may pass through the connecting portions and the corresponding side frames 1, thereby connecting and fixing the connecting members with the side frames 1. Wherein, the connecting position on the connecting piece 2 and the side frame 1 can be provided with connecting holes corresponding to each other, and the fastening piece can pass through the connecting holes to realize the fixation between the connecting piece and the side frame 1. Alternatively, the connecting holes may be in the form of threaded holes or unthreaded holes, and the fasteners may be in the form of bolts, screws, or rivets, which are commonly used fasteners.

Wherein, in order to make the side frame 1 obtain the fixed in equidirectional, including first connecting piece 2a and second connecting piece 2b in the screen frame, first connecting piece 2a and second connecting piece 2b are all connected with corresponding side frame 1 through fasteners 3 such as screws, and the fastener that is located on first connecting piece 2a has the different direction of penetrating with the fastener that is located on second connecting piece 2 b. Specifically, the penetrating direction of the fastening member on the first connecting member 2a may be perpendicular to the plane of the screen frame, and the penetrating direction of the fastening member on the second connecting member 2b may be parallel to the plane of the screen frame. Therefore, the side frame 1 can be fixed by the fastener no matter in the direction of the plane of the screen frame or in the direction perpendicular to the plane of the screen frame, so that the accurate positioning and connection between the side frame and the connecting piece 2 are realized.

When the penetrating direction of the fastening member 3 on the first connecting member 2a is parallel to the plane of the screen frame, the fastening member 3 for connecting with the first connecting member 2a penetrates into the side frame 1 and the inside of the first connecting member 2a along the direction perpendicular to the plane of the screen frame. Wherein, the first connecting piece 2a can be respectively connected with two adjacent side frames 1 in different directions by a plurality of fasteners 3.

Because the fasteners on the first connecting piece 2a and the second connecting piece 2b are respectively connected with the side frame 1 and the corresponding parts on the connecting piece 2 along different penetration directions, the fasteners can restrain the freedom degrees of the connecting piece 2 and the side frame 1 in a plurality of different directions (the direction parallel to the plane where the screen frame is located and the direction perpendicular to the plane where the screen frame is located), and the side frame 1 is fixed and limited in a plurality of mutually orthogonal directions, so that the spatial position of the side frame is reliably limited, and the phenomena of staggered layers and overlarge splicing seams of the side frame 1 due to inaccurate positioning are avoided. Meanwhile, the fastening piece can utilize self fastening force to tension the connecting piece 2 and the side frame 1 in the fastening process, so that the connecting piece 2 and the side frame 1 are close to each other and correct self positions under the fastening force action of the fastening piece, and accurate positioning between the connecting piece 2 and the side frame 1 is ensured. The mode that utilizes the fastener of different directions of penetrating to connect side frame 1 like this, butt joint and assembly position precision requirement between the side frame 1 are lower, let the personnel that do not possess the assembly experience also can be comparatively easy accomplish the assembly work of screen frame to the user of being convenient for carries out the free equipment of screen frame, saves the assembly cost.

Since each corner of the screen frame has the first connecting part 2a and the second connecting part 2b, correspondingly, the number of the accommodating grooves 11 on the side frame 1 can be two, and the accommodating grooves 11 and the connecting parts 2 are arranged in a one-to-one correspondence manner. When the connecting pieces 2 are installed on the side frames 1, each accommodating groove 11 on the side frame 1 is correspondingly inserted into one connecting piece 2, and the connecting pieces 2 and the adjacent other side frame are connected and fixed.

Because the connecting piece 2 is used for connecting two adjacent side frames 1a and 1b, correspondingly, as an optional structural form, the number of the inserting parts 21 of the connecting piece 2 is two, the two inserting parts 21 are respectively located at different sides of the connecting piece 2, and the two inserting parts 21 are respectively used for being connected with different accommodating grooves 11 on the corresponding side frames 1.

Specifically, since the extending directions of the two adjacent side frames 1a and 1b are different, the connecting member 2 may have a connecting portion having a different extending direction. The two adjacent side frames 1a and 1b are generally located in the same plane, and the length directions of the two side frames are perpendicular to each other, so that the extending directions of the two inserting parts can also be kept perpendicular to each other. In this case, the whole connecting member 2 may be an "L" -shaped structural member, and two sides of the "L" shape may be respectively used as two inserting portions 21 for connecting with the corresponding side frames. The two plug-in parts 21 can now form an angle of 90 °.

In addition, the inserting portion of the connecting member 2 may also have other structures and extending directions, for example, a certain included angle may be formed between the inserting portion and the length direction of the side frame 1, so as to reduce the assembling difficulty of the connecting member 2 and the side frame 1, which is not limited herein.

Due to the influence of the overall size of the screen frame, the thickness and width of the side frame 1 are greatly limited, so that the overall accommodating space of the side frame 1 is limited. Accordingly, the number of the connecting members 2 should not be too large. For example, the number of the connecting members 2 may be two.

As an alternative embodiment, the first connector 2a and the second connector 2b are arranged along a diagonal line of the screen frame. That is, the first connector 2a and the second connector 2b are respectively located at both inner and outer sides of the screen frame in the plane direction. Therefore, the first connecting piece 2a and the second connecting piece 2b can be respectively connected to different positions of the inner side and the outer side of the side frames 1, and the uneven phenomenon that one side of a seam between every two adjacent side frames 1 is wide and the other side of the seam is narrow is avoided. Wherein, the first connector 2a may be located at the outer side of the second connector 2b along the diagonal of the whole screen frame, that is, at a position close to the outer side wall of the screen frame; and the second connector 2b is located near the inner side wall of the screen frame.

For easy understanding, referring to fig. 5a and 5b, a specific connection structure of the insertion portion and the receiving groove will be described below by taking an example that the first connecting member 2a has two insertion portions, and the two insertion portions respectively correspond to the side frames 1a and 1b in two different directions: the first connecting piece 2a is provided with inserting parts 21a facing different directions, the inserting parts 21a are respectively connected with the side frames 1a and 1b through fasteners, and the fasteners connecting different side frames have the same orientation, namely the orientations are all perpendicular to the plane where the side frames 1a and 1b are located. Specifically, the connection holes may be formed in the insertion portion of the first connection member 2a (for example, the connection holes 23a formed in the insertion portion 211a and the insertion portion 21a, and see fig. 3 and the corresponding connection holes 13,14 also formed in the wall of the accommodating groove 11 of the side frame 2, and the first connection member 2a and the side frame 1 are connected by fasteners penetrating through the two connection holes, it is understood that the connection holes 23a formed in different insertion portions 21a may have the same orientation.

When the second connecting member 2b and the side frame 1 are connected by the fastening member, the penetrating direction of the fastening member, that is, the axial direction of the fastening member, is located in the plane of the screen frame. At this time, since the two adjacent side frames 1a and 1b are respectively perpendicular to two directions in the plane of the screen frame, the second connecting member 2b can be fastened and connected with different side frames by different fasteners, and the fasteners for connecting different side frames can have different orientations. Specifically, the fastening members 3 may be a fastening member 33, a fastening member 34, and the like for connecting the second connecting member 2b and the side frame 1.

Similar to the first connecting member 2a, for the convenience of understanding, the second connecting member 2b has two inserting portions, and the two inserting portions correspond to the side frames 1a and 1b in two different directions: the second connecting member has an inserting portion 21b and an inserting portion 21b facing different directions, the inserting portion 21b is connected with the side frame 1a through a fastening member 33, and the other inserting portion 21b is connected with the side frame 1b through a fastening member 34, wherein the fastening member 33 and the fastening member 34 are both oriented in a plane of the screen frame, and at this time, in order to connect the two side frames 1a and 1b facing different directions, respectively, the fastening member 33 and the fastening member 34 have different orientations, for example, the fastening member 33 is connected with the side frame 1a along a direction parallel to the side frame 1b, and the fastening member 34 is connected with the side frame 1b along a direction parallel to the side frame 1 a.

Optionally, when the fastener 33 and the fastener 34 are used to connect the second connecting member 2b and the side frame 1, a connection hole (for example, the connection hole 23b formed on the insertion portion 21b and the insertion portion 21 b) may be formed in the insertion portion of the second connecting member 2b, and a connection hole may also be formed in the wall of the accommodating groove of the side frame 1, and then the fastener is passed through the two connection holes, so as to connect the second connecting member 2b and the corresponding side frame 1. The connection holes 23b formed in the different insertion parts 21b may be oriented perpendicular to each other.

Further, since the orientation of the fastening member connected to the second connecting member 2b is parallel to the plane of the screen frame, in order to allow the fastening member to be reliably connected to the corresponding side frame 1, optionally, at least two fastening members including the fastening member 33 and the fastening member 34 are connected to the second connecting member 2b, and the penetrating direction of each fastening member is perpendicular to the side frame 1 corresponding to the fastening member. At this time, the fastening member 3 connects the side frame 1 and the second connecting member 2b in a direction perpendicular to the longitudinal direction of the side frame 1. Since the length directions of two adjacent side frames 1 are perpendicular to each other, the fastening members 3 connected to different side frames also maintain the perpendicular directions. Meanwhile, the penetrating direction of the fastening member 3 connected to the first connecting member 2a is perpendicular to the plane of the screen frame, and thus, is perpendicular to the penetrating direction of the fastening member corresponding to the second connecting member 2 b. Like this fastener on first connecting piece 2a and the second connecting piece 2b can be fixed connecting piece 2 (first connecting piece 2a or second connecting piece 2 b) and two side frames (side frame 1a and side frame 1 b) together from at least three mutually orthogonal directions respectively, lets side frame 1 can obtain the fixed of a plurality of ascending directions, connects and the location effect is better, can effectively reduce the phenomenon of side frame 1 seam is too big and dislocation.

In the above embodiment, the schematic structural diagram of the second connecting member 2b can be seen in fig. 6 a.

In addition, in order to avoid the deformation of the connecting member 2 when fixing the side frame 1, a reinforcing structure may be provided on the connecting member 2. In this embodiment, as shown in fig. 6b, a reinforcing structure may be provided on the second connector 2b, and this will be described as an example. Specifically, a reinforcing rib 25 is arranged between the two

insertion parts

21b and 21b of the second connecting piece 2b, so that the two insertion parts can be connected through the reinforcing rib 25 and still maintain the original angle when stressed. Wherein, the side of strengthening rib 25 towards grafting portion direction of inserting has spacing face 251, and spacing face is used for with the structure butt location on the side frame 1.

In summary, in the embodiments of the present invention, the screen frame includes a plurality of side frames connected end to end, a plurality of connecting members are disposed at the joints of two adjacent side frames, the connecting members are connected between the two adjacent side frames, and the connecting members are connected to the side frames through fasteners, a receiving groove is disposed on each side frame, an inserting portion of each connecting member is connected to a side wall of the receiving groove through a fastener, and an inserting portion of each connecting member is provided with a retractable engaging member, and correspondingly, a receiving hole is further disposed on a wall of the receiving groove, so that when the connecting members are fixedly connected to the side frames, the engaging members of the inserting portion engage with the receiving holes on the wall of the receiving groove for limiting, and the positioning of the relative positions of the connecting members and the side frames can be rapidly achieved, thereby improving the installation efficiency, and enabling a person without assembly experience to easily complete the assembly work of the screen frame, therefore, the free assembly of the screen frame is convenient for users, and the assembly cost is saved.

And the plurality of connecting pieces comprise a first connecting piece and a second connecting piece, the penetrating direction of the fastening piece on the first connecting piece is perpendicular to the plane where the screen frame is located, and the penetrating direction of the fastening piece on the second connecting piece is parallel to the plane where the screen frame is located. The side frames are positioned in a plurality of different directions parallel to the plane where the screen frame is located and perpendicular to the plane where the screen frame is located, the side frames can be fixed and limited in a plurality of directions orthogonal to each other, the space positions of the side frames are reliably limited, the phenomenon that the side frames are staggered and spliced due to inaccurate positioning is avoided, the assembling work of the screen frame can be easily completed by personnel without assembling experience, the free assembly of the screen frame and the laser projection display device is facilitated for users, and the assembling cost is saved.

Example two

The second embodiment of the invention also provides a laser projection display device. Fig. 8 is a schematic structural diagram of a laser projection display device according to a second embodiment of the present invention. As shown in fig. 8, the laser projection display device 300 of the present embodiment includes a projection screen 301 and a screen frame 302 according to the above embodiment, wherein the screen frame 302 is enclosed outside the projection screen 301. The laser projection display device 300 further includes a projection host 303 and the like. The specific structure, function and operation principle of the screen frame 302 have been described in detail in the foregoing embodiments, and are not described herein again.

Specifically, the projection screen 301 of the laser projection display device 300 is usually a soft or hard optical film, so that the projection screen 301 can be used to display the image projected by the projection host 303, and the screen frame 302 enclosed outside the projection screen 301 can fix and position the projection screen 301, so that the projection screen 301 can be fixed at a preset position, and the projection screen 301 can be extended to be a flat projection surface. Among them, the screen frame 302 may be connected to an edge of the projection screen 301 to fix the projection screen 301.

In addition, the laser projection display device 300 may further include an accessory such as a support frame, which is not limited herein.

In this embodiment, the laser projection display device includes a projection screen and a screen frame, the screen frame is surrounded on the outer side of the projection screen; the screen frame comprises a plurality of side frames which are connected end to end, a plurality of connecting pieces are arranged at the joints of every two adjacent side frames, the connecting pieces are connected between every two adjacent side frames and are connected with the side frames through fasteners, the screen frame comprises the side frames which are connected end to end, a plurality of connecting pieces are arranged at the joints of every two adjacent side frames, accommodating grooves which correspond to the connecting pieces one by one are formed in the joints of the side frames and the adjacent side frames, each connecting piece is provided with an inserting part which can extend into the accommodating grooves, each inserting part is provided with a telescopic clamping piece, and accommodating holes corresponding to the clamping pieces are formed in the groove walls of the accommodating grooves; the clamping piece is used for extending into the accommodating hole to realize positioning; and, this grafting portion passes through the fastener and is connected with the lateral wall of storage tank, and the location of the relative position of realization connecting piece and side frame that can be quick to improve the installation effectiveness, make the personnel that do not possess the assembly experience also can be comparatively easy accomplish screen frame's assembly work, thereby the user of being convenient for carries out screen frame and freely assembles.

Furthermore, the plurality of connecting pieces comprise a first connecting piece and a second connecting piece, the penetrating direction of the fixing piece on the first connecting piece is perpendicular to the plane where the screen frame is located, and the penetrating direction of the fixing piece on the second connecting piece is parallel to the plane where the screen frame is located. The side frames are positioned in a plurality of different directions parallel to the plane where the screen frame is located and perpendicular to the plane where the screen frame is located, the side frames can be fixed and limited in a plurality of directions orthogonal to each other, the space positions of the side frames are reliably limited, the phenomenon that the side frames are staggered and spliced due to inaccurate positioning is avoided, the assembling work of the screen frame can be easily completed by personnel without assembling experience, the free assembly of the screen frame and the laser projection display device is facilitated for users, and the assembling cost is saved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screen frame is characterized by comprising a plurality of side frames connected end to end, wherein a connecting piece is arranged at the joint of every two adjacent side frames, a containing groove corresponding to the connecting piece is formed in the joint of each side frame and the adjacent side frame, each connecting piece is provided with an inserting part which can extend into the containing groove, each inserting part is provided with a telescopic clamping piece, and the wall of each containing groove is provided with a containing hole corresponding to the clamping piece;

the clamping piece is used for extending into the accommodating hole to realize positioning;

and the insertion part is connected with the side wall of the containing groove through a fastening piece.

2. The screen frame of claim 1, wherein the engaging member is fixed to a sidewall of the insertion portion, and a telescopic direction of the engaging member is perpendicular to a sidewall surface of the insertion portion.

3. The screen frame of claim 1, wherein the number of the insertion parts of each connecting member is two, and the two insertion parts are respectively located at different sides of the connecting member and respectively connected with different accommodating grooves.

4. A screen frame as recited in claim 3, wherein the connector comprises a first connector and a second connector, the first connector having a fastener penetration direction perpendicular to a plane of the screen frame, and the second connector having a fastener penetration direction parallel to the plane of the screen frame.

5. A screen frame as recited in claim 4, wherein the first and second connectors are aligned along a diagonal of the screen frame, the first connector being located outside of the second connector.

6. A screen frame as defined in claim 4, wherein the second connecting member is provided with a catch member, the direction of extension and retraction of the catch member being perpendicular to the direction of penetration of the fastening member on the second connecting member.

7. A screen frame as defined in claim 4, wherein the first connecting member is provided with the engaging member, the engaging member is extended and retracted in the same direction as the insertion direction of the fastening member on the first connecting member, and the engaging member is disposed away from the insertion direction of the insertion portion.

8. A screen frame as recited in claim 3, wherein the plurality of engaging members are disposed on different ones of the plurality of connectors.

9. The screen frame of any of claims 1 to 8, wherein the catch is a spring loaded plunger.

10. The screen frame of any of claims 1 to 8, wherein the receiving holes are disposed toward a back side of the screen frame.

11. A laser projection display device comprising a projection host, further comprising a projection screen and the screen frame of any one of claims 1-10, wherein the screen frame is disposed around the projection screen.