CN105759501B

CN105759501B - Lamp strip mounting structure of direct type display device

Info

Publication number: CN105759501B
Application number: CN201610261789.5A
Authority: CN
Inventors: 王智勇; 周友根
Original assignee: Hefei Huike Jinyang Technology Co Ltd
Current assignee: Hefei Huike Jinyang Technology Co Ltd
Priority date: 2016-04-22
Filing date: 2016-04-22
Publication date: 2023-07-18
Anticipated expiration: 2036-04-22
Also published as: CN105759501A

Abstract

The invention is suitable for the field of display equipment, and discloses a lamp strip mounting structure of direct type display equipment, which comprises a back plate with a concave cavity and a plurality of lamp strips arranged in the concave cavity at intervals, wherein a supporting rib for supporting the lamp strips and a plurality of buckle structures for respectively and elastically buckling the lamp strips on the supporting rib are arranged in the concave cavity in a protruding mode. According to the invention, the lamp strip is elastically buckled on the supporting ribs through the buckle structure to realize fixation, so that the lamp strip can freely stretch in the length direction, and therefore, when a product is in a high-low temperature environment, the phenomenon of asynchronism of heat expansion and cold contraction of the lamp strip and the backboard caused by the material difference between the lamp strip and the backboard can not further cause the phenomena of tilting and arching of the lamp strip, and the stability and reliability of the product are improved; and after the product is stopped at normal temperature, the unsynchronized shrinkage of the lamp strip and the shrinkage of the backboard can not generate crackle noise in the product, so that the comfort of using the product by a user is improved.

Description

Lamp strip mounting structure of direct type display device

Technical Field

The invention belongs to the field of display equipment, and particularly relates to a lamp strip mounting structure of direct type display equipment.

Background

At present, the backlight mode of a liquid crystal television is mainly divided into a side light type and a backlight type, wherein the principle of the side light type backlight is that a light-emitting lamp strip is arranged on the upper side and the lower side or the left side and the right side of a backlight module, and then light emitted by the lamp strip is guided through a light guide plate, so that light can be uniformly and vertically projected to the back surface of a liquid crystal display screen, and after the liquid crystal display screen obtains uniform backlight, liquid crystal imaging is realized by driving liquid crystal molecules through a main board; the principle of direct type backlight is that the luminous lamp bars are arranged into a group and are directly and uniformly fixed on the back of the backlight module, so that the luminous LED lamps are arranged into a matrix form to be perpendicular to the liquid crystal display screen for light emission, the light is uniformly projected onto the back of the liquid crystal display screen through the optical diffusion plate and the diffusion film, and after the liquid crystal display screen obtains uniform backlight, liquid crystal imaging is realized through driving liquid crystal molecules through the main board.

In the prior art, the direct type backlight module light bar is generally fixed on the back plate in an adhesive manner or in a screw connection manner. However, since the material of the light bar substrate is generally an aluminum plate or a phenolic resin plate, and the material of the back plate is generally a plastic or a hot-dip galvanized steel plate, the light bar and the back plate shrink at high and low temperatures in both the bonding fixing mode and the screw connection fixing mode. Especially, when the product is produced at normal temperature (about 20 ℃), works at-10 ℃ or is stored at-20 ℃, the bad phenomena of falling back glue and tilting of the light bar can occur when the light bar is adhered; the lamp strip is fixed by the locking screw, so that the lamp strip is partially arched and unrecoverable, and the defects are particularly obvious when the backboard is made of plastic. In addition, even if the liquid crystal television is operated in a normal temperature environment, it has the following problems in specific applications: because the lamp strip generates heat when shining, so in the operation of product, the lamp strip can slowly expand to become longer, and the temperature of lamp strip just can drop rapidly when the product stops the operation, and at this moment, the lamp strip can shrink and shorten, and at the shrink in-process of lamp strip, can take place relative movement between lamp strip and backplate, the screw to make the product send out the noise of crackling, seriously influenced the travelling comfort of user's use product.

Disclosure of Invention

The invention aims to overcome at least one defect of the prior art, and provides a lamp strip mounting structure of a direct type display device, which solves the problem that the lamp strip is arched or tilted when being fixed on a back plate at high and low temperatures in a screw connection mode or an adhesive mode in the prior direct type display device, and solves the problem that abnormal noise is generated in a product when the lamp strip is stopped under normal temperature working condition in the prior direct type display device in the screw connection mode.

In order to achieve the above purpose, the invention adopts the following technical scheme: the lamp strip mounting structure of the direct type display device comprises a back plate with a concave cavity and a plurality of lamp strips arranged in the concave cavity at intervals, wherein supporting ribs for supporting the lamp strips and a plurality of buckle structures for respectively elastically buckling the lamp strips on the supporting ribs are arranged in the concave cavity in a protruding mode.

Optionally, each of the fastening structures includes two end fasteners for fastening two ends of the light bar, and at least one middle fastener located between the two end fasteners for fastening an intermediate portion of the light bar.

Optionally, the end buckle and the middle buckle each comprise a vertical extension part vertically arranged for limiting the horizontal movement displacement of the light bar in the concave cavity and a transverse extension part bent from the top end of the vertical extension part and transversely extended for limiting the vertical movement displacement of the light bar in the concave cavity.

Optionally, the lateral extension portion includes a guide portion, a clearance portion connected with the vertical extension portion, and a buckling portion connected between the clearance portion and the guide portion, the buckling portion is recessed downwards relative to the clearance portion and the guide portion, and the guide portion is tilted upwards from an end portion of the buckling portion away from the buckling portion.

Optionally, a plurality of horizontal limiting ribs are further protruding on the supporting ribs, and each horizontal limiting rib and each vertical extending portion respectively perform horizontal limiting on the lamp strip from two opposite sides of the lamp strip.

Optionally, a side of each end buckle facing away from the middle buckle extends and is fixedly connected to an inner side wall of the concave cavity, which is close to the end buckle, and two sides of each middle buckle facing towards the two end buckles are suspended.

Optionally, the rear side portion of backplate is equipped with at least one with the fretwork hole that middle buckle counterpoint set up, with the fretwork hole counterpoint set up middle buckle both sides still protruding two little protruding buckles that are equipped with.

Optionally, a guide stop block for guiding and installing and presetting the lamp strip is further arranged in the concave cavity in a protruding mode.

Optionally, the lateral part of lamp strip is equipped with the opening hole, protruding be equipped with in the cavity with opening hole card inserts the cooperation in order to be used for restricting the lamp strip is along its length direction removal's reference column, the opening hole is followed the length direction of lamp strip is close to the intermediate position setting of lamp strip.

Optionally, a plurality of protruding columns are further arranged in the concave cavity, and a plurality of limiting holes which are respectively in clearance fit with the protruding columns are formed in the lamp strip in a penetrating mode.

According to the lamp bar mounting structure of the direct type display equipment, the lamp bar is supported by arranging the supporting ribs in the concave cavity of the back plate, and the lamp bar is locked and fixed on the supporting ribs by arranging the buckling structure in the concave cavity, so that the lamp bar is mounted and fixed on the back plate effectively. The lamp strip is elastically buckled on the supporting ribs through the buckling structure to realize fixation, so that the lamp strip can freely extend in the length direction, and when a product is in a high-low temperature environment, the phenomenon of asynchronous expansion and contraction of the lamp strip and the backboard caused by the material difference between the lamp strip and the backboard can not further cause the phenomenon of poor tilting and arching of the lamp strip, thereby essentially solving the problem of the tilting and arching of the lamp strip caused by asynchronous expansion and contraction of the lamp strip and the backboard, and improving the stability and reliability of the product; and after the product is stopped at normal temperature, the unsynchronized shrinkage of the lamp strip and the shrinkage of the backboard can not generate crackling noise inside the product, so that the problem that the lamp strip, the screw and the middle shell slide in a jumping manner due to unsynchronized shrinkage of materials after the product is stopped at normal temperature to generate bad noise inside the product is essentially solved, and the experience effect of a user on the product is effectively improved. In addition, the lamp strip adopts the buckle installation mode to be relative to the screw installation mode and the bonding installation mode, and its installation operation is simpler, convenient, has improved the production efficiency of product to a great extent to effectively reduced the raw and other materials cost of product (especially for the scheme that the lamp strip adopted the bonding mode), thereby more be favorable to improving the market competition of product.

Drawings

Fig. 1 is an exploded view of a direct type display apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic top plan view of an assembly of a light bar and a back plate according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of B-B of FIG. 2;

FIG. 5 is a schematic cross-sectional view of C-C of FIG. 2;

FIG. 6 is a schematic structural diagram of a back plate according to an embodiment of the present invention;

FIG. 7 is a partially enlarged schematic illustration of FIG. 6 at D;

FIG. 8 is an enlarged partial schematic view at E in FIG. 6;

fig. 9 is a schematic structural diagram of a light bar according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that, in the following embodiments, terms of left, right, upper, lower, top, bottom, and the like are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.

As shown in fig. 1 to 9, the light bar mounting structure of the direct type display device provided by the embodiment of the invention includes a back plate 1 having a cavity 10 and a plurality of light bars 2 mounted in the cavity 10 at intervals, wherein a supporting rib 11 for supporting the light bars 2 and a plurality of fastening structures 12 for elastically fastening each light bar 2 on the supporting rib 11 are convexly arranged in the cavity 10. According to the lamp strip mounting structure of the direct type display device, the lamp strip 2 is supported by arranging the supporting ribs 11 in the concave cavity 10 of the back plate 1, and the lamp strip 2 is locked and fixed on the supporting ribs 11 by arranging the buckling structure 12 in the concave cavity 10, so that the lamp strip 2 is mounted and fixed on the back plate 1 effectively. Because the lamp strip 2 is elastically buckled on the supporting ribs 11 through the buckling structure 12 to realize fixation, the lamp strip 2 can freely extend in the length direction, so that when a product is in a high-low temperature environment, the phenomenon of asynchronous expansion and contraction of the lamp strip 2 and the backboard 1 caused by the material difference between the lamp strip 2 and the backboard 1 can not further cause the phenomenon of poor tilting and arching of the lamp strip 2, and the problem of the tilting and arching of the lamp strip 2 caused by asynchronous expansion and contraction of the lamp strip 2 and the backboard 1 is fundamentally solved; and after the product is stopped at normal temperature, the unsynchronized shrinkage of the light bar 2 and the shrinkage of the backboard 1 can not generate crackling noise in the product, so that the problem that the product is stopped at normal temperature, and then the light bar 2, the screw and the middle shell slide in a jumping manner due to unsynchronized shrinkage of materials to generate bad noise in the product is fundamentally solved, and the experience effect of a user on the product is effectively improved. In addition, the buckle connection mode can be finished by bare-handed operation, and compared with the screw connection mode and the bonding mode, the installation operation is simpler and more convenient, the production efficiency of the product is greatly improved, the raw material cost of the product is effectively reduced (especially compared with the scheme of adopting the bonding mode for the light bar 2), and the market competitiveness of the product is improved more favorably.

Preferably, referring to fig. 1, 2, 6, 7 and 8, each of the fastening structures 12 includes two end fasteners 121 for fastening two ends of the light bar 2, and at least one middle fastener 122 between the two end fasteners 121 for fastening an intermediate portion of the light bar 2. Each end buckle 121 and each middle buckle 122 in the same buckle structure 12 are distributed at intervals along the length direction of the light bar 2, so that the light bar 2 has a plurality of stress points along the length direction, and the stability and the reliability of the installation of the light bar 2 are ensured.

Preferably, referring to fig. 1-3 together, the middle part of the light bar 2 (except for the two ends of the light bar 2) has a plurality of supporting parts supported on the supporting ribs 11, and the two ends of the light bar 2 are arranged in cantilever, i.e. the two ends of the light bar 2 are not supported on the supporting ribs 11, and the supporting ribs 11 are not extended to the part right below the two ends of the light bar 2. Here, adopt support rib 11 to support the middle part of lamp strip 2 to make the both ends of lamp strip 2 be the cantilever type and place, so, both do benefit to the support reliability of guaranteeing support rib 11 to lamp strip 2, do benefit to the degree of difficulty of reducing lamp strip 2 to install between support rib 11 and buckle structure 12 again.

Preferably, referring to fig. 1, 2, 5, 6, 7 and 8, one side of each end buckle 121, opposite to the middle buckle 122, extends and is fixedly connected to the inner side wall of the cavity 10, which is close to the end buckle 121, and two sides of each middle buckle 122, which face the two end buckles 121, are suspended, so that the end buckle 121 has almost no elasticity in the vertical direction, and the middle buckle 122 has better elasticity in the vertical direction, thereby not only ensuring the stability and reliability of the installation of the light bar 2 in the cavity 10, but also ensuring the convenience of the disassembly and assembly of the light bar 2. Specifically, since the two end parts of the light bar 2 are arranged in a cantilever manner, that is, the two end parts of the light bar 2 have a certain elastic deformation space in the vertical direction, in the process of installing the light bar 2, the end parts of the light bar 2 can slide into the lower part of the end part buckle 121 through the deformation of the end parts of the light bar 2, the end part buckle 121 does not need to be arranged to have elasticity, the assembly and the matching of the end part buckle 121 and the end part of the light bar 2 can be realized, and the end part buckle 121 is arranged to have no elasticity, thereby being beneficial to the manufacturing and the forming of the end part buckle 121 and being beneficial to improving the stability and the reliability of the installation of the light bar 2; the middle part of the light bar 2 has little elastic deformation space in the vertical direction due to the limit of the supporting ribs 11, so that the middle part of the light bar 2 needs to be slid under the middle buckle 122 by the deformation of the middle buckle 122 during the installation of the light bar 2.

Preferably, referring to fig. 1, 3, 6, 7 and 8 together, the end buckle 121 and the middle buckle 122 each include a vertically extending portion 1201 vertically arranged to restrict the horizontal movement displacement of the light bar 2 within the cavity 10 and a laterally extending portion 1202 bent from the top end of the vertically extending portion 1201 to laterally extend to restrict the vertical movement displacement of the light bar 2 within the cavity 10. The vertical extending part 1201 and the horizontal extending part 1202 are enclosed to form a clamping groove for clamping and positioning the lamp strip 2, when the lamp strip is specifically installed, the lamp strip 2 can slide into the clamping groove from the end of the horizontal extending part 1202 far away from the vertical extending part 1201, and the horizontal extending part 1202 can be buckled on the part of the lamp strip 2 positioned in the clamping groove.

Preferably, referring to fig. 1, 3, 6, 7 and 8 together, the lateral extension 1202 includes a guide portion 12021, a space portion 12022 connected to the vertical extension, and a buckling portion 12023 connected between the space portion 12022 and the guide portion 12021, the buckling portion 12023 is recessed downward relative to the space portion 12022 and the guide portion 12021, and the guide portion 12021 is tilted upward from an end of the buckling portion 12023 away from the buckling portion 12023. The buckling part 12023 is mainly used for realizing the buckling function of the transverse extension 1202 on the light bar 2; the guiding portion 12021 is configured to guide the light bar 2 sliding under the lateral extension 1202; the arrangement of the space 12022 can reduce the contact area between the lateral extension 1202 and the lamp body 22, thereby facilitating the installation and removal of the light bar 2.

Preferably, referring to fig. 1, 2, 6, 7 and 8, the supporting rib 11 is further provided with a plurality of horizontal limiting ribs 13, each horizontal limiting rib 13 and each vertical extending portion 1201 respectively perform horizontal limiting on the light bar 2 from two opposite sides of the light bar 2, and the horizontal limiting ribs 13 and the vertical extending portions 1201 can perform limiting on the light bar 2 from two sides of the width direction of the light bar 2. Here, through the setting of the spacing rib 13 of level, can prevent effectively that lamp strip 2 from deviating from the draw-in groove when receiving vibrations striking in the whole product packaging transportation and the condition that lamp strip 2 slided out from the draw-in groove when the product rolled in the transportation from taking place, fully guaranteed the installation firm reliability of lamp strip 2.

Preferably, referring to fig. 5 and 8, at least one hollowed-out hole 14 aligned with the middle buckle 122 is provided on the rear side of the back plate 1, and two small protruding buckles 15 are further protruding on two sides of the middle buckle 122 aligned with the hollowed-out hole 14. For ease of description, herein, the middle clip 122 that is not aligned with the hollowed-out hole 14 is defined as a first clip 1221, and the middle clip 122 that is aligned with the hollowed-out hole 14 is defined as a second clip 1222. The hollowed-out hole 14 is beneficial to reducing the material cost of the product and beneficial to manufacturing and forming the second buckle 1222. The convex buckle can be used for blocking light on one hand, so that light rays emitted by the light bar 2 can be prevented from being emitted out of the backboard 1 through the hollowed-out holes 14; and on the other hand, can be used for further buckling and positioning the light bar 2.

Preferably, each catch structure 12 comprises two end catches 121 and four intermediate catches 122, and wherein the four intermediate catches 122 of one catch structure 12 comprise two first catches 1221 and two second catches 1222, respectively, each first catch 1221 being located between one end catch 121 and one second catch 1222. Of course, the manner in which the snap structure 12 is disposed is not limited to this specific application.

Preferably, referring to fig. 1, 2, 6 and 7, a plurality of guide stoppers 16 for guiding and positioning the light bar 2 are further protruded in the cavity 10. The guide stop block 16 is mainly used for pre-positioning the light bar 2 when the light bar 2 is installed so as to realize blind installation of the light bar 2, thereby improving production and assembly efficiency of products.

Preferably, the number of guide stoppers 16 is the same as the number of catch structures 12, and each guide stopper 16 is disposed beside an end catch 121 in one catch structure 12. When the light bar 2 is installed, one end of the light bar 2 can be abutted against the guide stop block 16, and then the light bar 2 is slid into the buckle structure 12. When the light bar 2 is in place, the end of the light bar 2 will be separated from contact with the guide stopper 16, thereby ensuring that the guide stopper 16 does not interfere with free expansion of the light bar 2 in high and low temperature environments.

Preferably, each guide stopper 16 is protruded on the left inner sidewall of the cavity 10, and each guide stopper 16 is located at the side of each end buckle 121 of the left inner sidewall of the cavity 10. When the light bar 2 is installed, the left end face of the light bar 2 can be abutted against the guide stop block 16, and then the light bar 2 is slid into the buckle structure 12.

Preferably, referring to fig. 2, 6, 8 and 9, the side of the light bar 2 is provided with an opening 211, and the cavity 10 is internally provided with a positioning column 17 in a protruding manner, which is in a snap fit with the opening 211 and is used for limiting the movement of the light bar 2 along the length direction, and the opening 211 is arranged near the middle position of the light bar 2 along the length direction of the light bar 2. The positioning column 17 is matched with the opening hole 211 in a clamping and inserting way, so that the light bar 2 can be precisely guided and positioned in the horizontal direction, and the stability and the reliability of the installation of the light bar 2 are further improved; and because the opening 211 is arranged near the middle of the light bar 2, the light bar 2 can be freely stretched towards the two ends along the length direction.

Preferably, the opening hole 211 is a U-shaped horn opening formed at one side of the light bar 2, i.e. the outline of the opening hole 211 is approximately U-shaped, and the opening of the opening hole is in a horn-shaped opening, so that the positioning column 17 can be better assembled and matched with the opening hole 211.

Preferably, referring to fig. 2, 6, 7 and 9, a plurality of protruding columns 18 are further disposed in the cavity 10, and a plurality of limiting holes 212 respectively in clearance fit with the protruding columns 18 are formed in the light bar 2. The cooperation between projection 18 and spacing hole 212 can be used to realize the thick location to lamp strip 2, does benefit to the firm reliability of further improving lamp strip 2 installation. The fit between the protruding column 18 and the limiting hole 212 is designed to be clearance fit, so that the positioning column 17 does not interfere with free expansion and contraction of the light bar 2.

Preferably, referring to fig. 1, 3 and 9 together, the light bar 2 is an LED light bar, and includes a base plate 21 and a plurality of LED light bodies 22 protruding from the base plate 21 at intervals, wherein the opening holes 211 and the limiting holes 212 are all formed in the base plate 21, and the buckling part 12023 buckles the base plate 21 on the supporting ribs 11. The substrate 21 may be made of aluminum plate, phenolic resin plate, etc., and the back plate 1 may be made of plastic or hot dip zinc steel plate, etc. The LED lamp strip is adopted as the lamp strip 2, so that the LED lamp strip has the advantages of compact structure, flexible installation, good energy-saving effect, long service life, high luminous efficiency and good environmental protection performance, and can be beneficial to improving the comprehensive performance of products; of course, the light bar 2 is not limited to use with an LED light bar in a particular application.

Preferably, the two lamp strips 2, the buckling structure 12 and the guide stop block 16 are arranged, and the lamp strip has the characteristics of simple structure and convenient installation on the premise of meeting the product performance; of course, the number of light bars 2, snap structures 12 and guide stops 16 is not limited to this in a particular application.

The mounting process of the light bar 2 in the embodiment of the invention is as follows: the lamp strip 2 is placed on the support rib 11 in a manner that the left end face is clung to the guide stop block 16, one side of the lamp strip 2 is placed at the guide part 12021 of the buckle structure 12, two hands pinch the positions, close to the two first buckles 1221, of the two ends of the lamp strip 2, the lamp strip 2 slides from the guide part 12021 towards the clearance part 12022, after the lamp strip 2 is slidably installed in place, clicking sounds can be heard under the combined action of the buckling part 12023 and the horizontal limiting rib 13, and accordingly, the assembly of the lamp strip 2 is indicated. In the whole installation operation of the light bar 2, the user can finish the operation by hands without any auxiliary tool, and the installation operation is very simple and convenient.

The lamp strip mounting structure of the direct type display device provided by the embodiment of the invention is preferably suitable for direct type liquid crystal display devices, such as liquid crystal displays of liquid crystal televisions or computers or all-in-one computers and the like. The direct type liquid crystal display device may specifically further include a reflective sheet 3, an optical diffusion sheet, a membrane 4, a liquid crystal screen assembly 5, a rear cover, and the like, where the reflective sheet 3, the optical diffusion sheet, the membrane 4, and the liquid crystal screen assembly 5 are all mounted on the front side of the back plate 1, the reflective sheet 3 is located between the light bar 2 and the optical diffusion sheet, and the membrane 4 is located between the optical diffusion sheet and the liquid crystal screen assembly 5, and the rear cover is mounted on the rear side of the back plate 1 in a covering manner.

According to the embodiment of the invention, the locking screw fixing structure and the sticky double-sided adhesive fixing structure of the existing lamp strip 2 are changed into the elastic buckle mounting structure, so that the problem that products are invalid due to tilting and arching of the lamp strip 2 caused by material difference and asynchronous expansion and contraction of the lamp strip 2 and the backboard 1 is essentially solved, and meanwhile, the problem that the products are suddenly slid between the lamp strip 2, the screws and the backboard 1 to generate crackle noise due to asynchronous contraction after normal-temperature working and shutdown of the products is essentially solved. In addition, the lamp strip 2 adopts a buckle mounting mode, the mounting operation is very simple and convenient, the production and assembly efficiency of the product is greatly improved, and the raw material cost of the product is effectively reduced (especially compared with the scheme of adopting an adhesive mode for the lamp strip 2), thereby being more beneficial to improving the market competitiveness of the product.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a straight following formula display device's lamp strip mounting structure, including backplate and a plurality of interval that have the cavity install in lamp strip in the cavity, its characterized in that: the lamp comprises a lamp strip, a concave cavity, a plurality of lamp strips, a support rib and a plurality of buckle structures, wherein the support rib is used for supporting the lamp strip, the buckle structures are used for respectively elastically buckling the lamp strips on the support rib, each buckle structure comprises an end buckle and a middle buckle, at least one hollowed-out hole which is arranged in alignment with the middle buckle is arranged on the rear side part of the back plate, two small convex buckles are further arranged on two sides of the middle buckle which is arranged in alignment with the hollowed-out hole in a protruding mode, and each convex buckle is used for buckling, positioning and blocking light of the lamp strip; one side of each end buckle, which is opposite to the middle buckle, is fixedly connected to the inner side wall of the concave cavity, which is close to the end buckle, each middle buckle faces to two sides of the end buckle, the two sides of the lamp strip are suspended, the two ends of the lamp strip are cantilever-shaped, the lamp can freely extend in the length direction, a guide stop block for guiding and installing the lamp strip and pre-positioning the lamp strip is further convexly arranged in the concave cavity, and after the lamp strip is installed in place, the end part of the lamp strip can be separated from the contact of the guide stop block.

2. The light bar mounting structure of a direct type display device according to claim 1, wherein: each buckle structure comprises two end buckles used for buckling two ends of the light bar respectively and at least one middle buckle located between the two end buckles and used for buckling the middle part of the light bar.

3. The light bar mounting structure of a direct type display device according to claim 2, wherein: the end buckle and the middle buckle comprise a vertical extension part which is vertically arranged and used for limiting the horizontal movement displacement of the lamp strip in the concave cavity, and a transverse extension part which is bent and transversely extended from the top end of the vertical extension part and used for limiting the vertical movement displacement of the lamp strip in the concave cavity.

4. The light bar mounting structure of a direct type display apparatus as claimed in claim 3, wherein: the transverse extension part comprises a guide part, a clearance part connected with the vertical extension part and a buckling part connected between the clearance part and the guide part, the buckling part is arranged in a downward concave manner relative to the clearance part and the guide part, and the guide part is arranged from the end part, far away from the buckling part, of the buckling part in an inclined upward tilting manner.

5. The light bar mounting structure of a direct type display apparatus according to claim 3 or 4, wherein: and a plurality of horizontal limiting ribs are further arranged on the supporting ribs in a protruding mode, and each horizontal limiting rib and each vertical extending portion are used for carrying out horizontal limiting on the lamp strip from two opposite sides of the lamp strip.

6. The light bar mounting structure of the direct type display apparatus according to any one of claims 1 to 4, wherein: the lateral part of lamp strip is equipped with the opening hole, protruding be equipped with in the cavity with the opening hole card inserts the cooperation in order to be used for restricting the lamp strip is along its length direction removal's reference column, the opening hole is followed the length direction of lamp strip is close to the intermediate position setting of lamp strip.

7. The light bar mounting structure of the direct type display apparatus according to any one of claims 1 to 4, wherein: and a plurality of convex columns are further arranged in the concave cavity, and a plurality of limiting holes which are respectively in clearance fit with the convex columns are formed in the lamp strip in a penetrating mode.