CN110136604A - A kind of constructive method of arc module lamp box - Google Patents

Abstract

The present invention relates to a kind of constructive methods of arc module lamp box, first by and strip support bar, the mask that is mounted on front side of the support bar and the lamp bar being mounted on rear side of the support bar of mask and lamp bar installation form a kind of strip backlight module；Above-mentioned support bar by: the light trough on rear side of support bar substrate, substrate connects convex block with fixed card slot and substrate and is integrally formed, and in the light trough on rear side of substrate be equipped with multiple equally distributed lamp holes；Detent on mask side plate connect convex block with substrate and is connected together；The light source being arranged on front side of lamp bar is placed in lamp hole, and the lamp bar terminals being arranged in lamp bar are via electrical interconnection and bus-powered connection.Then more strip backlight modules are pressed into vertical or horizontal mutual splicing, is fixed via fixed card slot and curved support frame bolt, and bus is connect with power supply power supply, to constitute arc module lamp box.The arc module lamp box being spliced to form according to the method described above, with good appearance, shine uniformly, structure is simple, is easily installed advantage with maintenance.

Description

A kind of constructive method of arc module lamp box

Technical field

The present invention relates to lamp box technical fields, and in particular to a kind of constructive method of arc module lamp box.

Background technique

It is well known that the application of lamp box and be it is extensive, it is related to building field, industrial circle, commercial field, medical leads Domain, advertizing field etc., wherein advertizing field should have the most extensively.

Currently, advertising lamp house structure mainly has the following two kinds: one is the lamp boxes of side entrance back source structure, mainly by leading Tabula rasa and light source composition, are mounted on light guide plate side for light source, are equipped with light guiding points made of engraving or printing in light guide plate bottom. Due to guide-lighting distance limitation, the lamp box of side entrance back source structure is applicable in the lesser product of light-emitting area.It is usually used in small dimension Decoration painting, Window Display, plate lighting etc..But the two sides of light guide plate or it is surrounded by light source, make the two sides or four of light guide plate Week, there are the dark spaces caused by light source body, cannot achieve no shadow splicing.Another kind is the lamp box of direct backlight source structure, main To be made of panel, light source and cabinet, panel be mounted on cabinet front, light source is mounted on rear side of cabinet, light-dispersing effect by The distance between astigmatism plate and light source are set, and therefore, the lamp house thickness of direct backlight source structure is far longer than side entering type back Light unit, since it has the advantages such as brightness is high, light source controllability is strong, direct-type backlight unit using extremely wide, Such as advertising lamp box, signboard lamp house, guiding plate lamp box and show window lamp box.But the cabinet surrounding of direct-type backlight unit is not The box body wall of light transmission, serious shadow can also be gone out between rear box by splicing, and therefore, also cannot achieve no shadow splicing.It is above-mentioned it is found that Mainstream advertising lamp box is only limitted to the lamp box of small breadth at present.The large format advertisement of outdoor advertising communication sphere is still stuck in air brushing Four kinds of advertisement, LED display advertisement and luminescent characters advertisement mainstream open air carriers are turned in advertisement, three faces.

With the development of the global economy, constantly promoting under the new situation in Global Urbanization and smart city, spirit text Bright and material progress to significantly improve, more stringent requirements are proposed to visual aspects by people, the development of various promotional display terminals It is more unprecedented surging.Therefore, there is an urgent need to develop the back light unit presentation device of large area light emitting, such as large area lamp box, large size Dynamic lamp box and large area backlight show equipment etc., to meet the market demand.

Summary of the invention

Place and existing defect in order to overcome the deficiencies of the prior art, the present invention provide a kind of structure is simple, shine uniformly, It is easily installed the constructive method with maintenance, the arc module lamp box for being satisfied with outdoor application.

The present invention be solve prior art defect a kind of arc module lamp box constructive method, first by and mask and Strip support bar, the mask being mounted on front side of the support bar and the lamp bar group being mounted on rear side of the support bar of lamp bar installation At a kind of strip backlight module；Above-mentioned support bar by: if by length direction setting on rear side of support bar substrate, support bar substrate Dry item is uniformly distributed, certain distance is kept by two, is parallel to each other, the retaining wall on rear side of the substrate of vertical protrusion on rear side of substrate encloses At on front side of two fixed card slots being parallel to each other and support bar substrate on rear side of the light trough and support bar substrate on rear side of substrate two Substrate connection convex block of the side edge department with detent is integrally formed, and multiple equally distributed lamps are equipped in the light trough on rear side of substrate Hole；Above-mentioned mask is from panel, the panel two sides on the mask side plate of rear projection and the mask side plate of the mask side plate rear lateral portion Detent be integrally formed, the detent on the mask side plate connect convex block with substrate and is connected together；After above-mentioned lamp bar is mounted on substrate In the light trough of side, the light source being arranged on front side of the lamp bar is placed in lamp hole, and the lamp bar terminals being arranged in lamp bar are via electric connection line Road and bus-powered connection.Then more strip backlight modules are pressed into vertical or horizontal mutual splicing, via fixed card slot and arc Shape support frame bolt is fixed, and bus is connect with power supply power supply, to constitute arc module lamp box.From above-mentioned arc module lamp The constructive method of case is it is found that since lamp bar is mounted in the light trough on rear side of substrate, so that lamp bar is maintained a certain distance with panel, To obtain the hot spot of scattering in mask using the astigmatism angle of light source itself；Since support bar substrate is equipped with several Light trough on rear side of the substrate of even distribution, and equally distributed lamp hole is equipped in the light trough on rear side of substrate, as long as the brightness of light source Unanimously, uniform face light can be presented on mask；Due to mask from panel, the panel two sides to the mask side plate of rear projection and Detent on the mask side plate of the mask side plate rear lateral portion is integrally formed, therefore, mask two sides have no occluder, so that the strip is carried on the back Optical module is not in apparent concealed wire or blackening after mutually splicing；Since strip backlight module width dimensions are smaller, structure The section of camber is also smaller, so that arcwall face is more smooth；Since lamp bar is mounted on rear side of support bar, enable lamp bar from lamp Implement dismounting on rear side of case, consequently facilitating maintenance.The arc module lamp box being spliced to form according to the method described above has beautiful outline form See, shine uniformly, structure is simple, is easily installed advantage with maintenance.

Further, fixed card slot of the present invention is a kind of card slot with detent, it by two holding certain distances, The card slot slot arm be parallel to each other, chosen backward and the notch being located on rear side of the card slot slot arm are by mirror image to inward side to relatively convex Platform grade on the inside of the detent of the notch risen and the card slot being located between card slot slot arm inside portion and substrate is constituted.

Further, substrate two is respectively equipped in the rear lateral portion that support bar substrate two sides correspond to the connection detent on support bar The step of side, so that the extension on rear side of support bar substrate two sides and mask side plate forms two glue-filling slots, and in the glue-filling slot Middle perfusion protective rubber, to prevent rainwater from entering between the support bar and mask of strip backlight module both sides.

Further, several are equipped on support bar substrate to arrange by strip direction, mutually keep certain distance, is mutual In parallel, section is at the circular groove on circular substrate.

Further, light trough (the middle perfusion protection after lamp bar is mounted in the light trough on rear side of the substrate, on rear side of substrate Glue, to implement to protect to lamp bar.

Further, the light trough being additionally provided on rear side of substrate between one or more lamp holes is being spaced in the light trough on rear side of substrate In spacious hole, the component in lamp bar in addition to light source is placed in the spacious hole in the light trough on rear side of the substrate, so that above-mentioned lamp The circuit board of item can single-sided aluminum-base plate, to reduce manufacturing cost.

Further, it is additionally provided with the spacious hole on one or more substrates on support bar substrate, and lamp bar terminals are set On front side of circuit board, electrical interconnection is connect after drawing from the spacious hole on substrate with bus.

Further, strip backlight module further includes the bus terminal in the spacious hole being located on a substrate, the bus terminal Front side end is connect with electrical interconnection, and the rear side end of the bus terminal is connect with power supply power supply, thus, convenient for route and dimension connection Shield maintenance.

Further, strip backlight module of the present invention further includes the lens for being located at lamp hole front side portion, and the lens are excellent Concavees lens are selected as, and are equipped with lens attachment device in the lens rear lateral portion.

Said lens attachment device is the strip on rear side of a kind of two lens being parallel to each other for being located at lens rear lateral portion；For Fit lens installation is respectively equipped with the convex block on front side of front projection, the lamp hole being parallel to each other, convex block on front side of the lamp hole in lamp hole two sides Distance and the sizes of lens cooperate, and correspond to the strip on rear side of lens on front side of the lamp hole on the inside of convex block equipped with convex on front side of lamp hole Detent on block；Lens are mounted on lamp hole front side portion, engage via the strip on rear side of lens with the detent on convex block on front side of lamp hole Connection.

The beneficial effect of the constructive method of arc module lamp box of the present invention is:

First is that since lamp bar is mounted in the light trough on rear side of substrate, so that lamp bar is maintained a certain distance with panel, thus, benefit With the astigmatism angle of light source itself, the hot spot of scattering is obtained in mask；Simultaneously as support bar substrate is equipped with several uniformly Light trough on rear side of the substrate of distribution, and equally distributed lamp hole is equipped in the light trough on rear side of substrate, as long as the brightness one of light source It causes, uniform face light can be presented on mask；

Second is that since mask is from panel, the panel two sides to the mask of the mask side plate of rear projection and the mask side plate rear lateral portion Detent on side plate is integrally formed, and the detent on mask side plate connect convex block with substrate and is connected together, mask two sides have no occluder, So that the strip backlight module mutually splice after be not in apparent concealed wire or blackening；

Third is that since strip backlight module width dimensions are smaller, the section for constituting arc is also smaller, so that arcwall face is more Add smooth；

Fourth is that enabling lamp bar to implement dismounting on rear side of lamp box since lamp bar is mounted on rear side of support bar, consequently facilitating maintenance is protected It supports；

Fourth is that strip backlight module further includes the lens for being located at lamp hole front side portion for more demanding module lamp box, it should The carry out shaping that lens can issue light source, adjustment light intensity effect, especially the lens are preferably concavees lens, to effectively improve scattered Light effect；

The arc module lamp box being spliced to form according to the method described above, have good appearance, shine uniformly, structure it is simple, convenient for peace The advantage of dress and maintenance.

Detailed description of the invention

Below according to attached drawing, the invention will be further described, and attached drawing for a better understanding of the invention, should not only become Limitation of the present invention:

Fig. 1 is the step schematic diagram of the constructive method of arc module lamp box of the present invention；

Fig. 2 is partial profile structure on front side of strip backlight module of the present invention；

Fig. 3 is strip backlight module rear structure schematic diagram of the present invention；

Fig. 4 is present invention A-A the schematic diagram of the section structure as shown in Figure 2；

Fig. 5 is the rear structure schematic diagram of support bar of the present invention；

Fig. 6 is arc module lamp box positive structure schematic of the present invention；

Fig. 7 is present invention B-B the schematic diagram of the section structure as shown in Figure 6.

Mark explanation in attached drawing:

1-support bar, 11-support bar substrates, 11a-substrate two sides step, the spacious hole on 11b-substrate, after 12-substrates Light trough, 12b-lamp hole on rear side of side retaining wall, 12a-substrate, the spacious hole in 12c-light trough, 13-fixed card slots, 13a-card slot Slot arm, 13b-notch detent, the platform grade on the inside of 13c-card slot, 14-substrates connection convex block, the circular groove on 15-substrates, Detent, 10-glue-filling slots, 2-masks, 21-panels, 22-faces on front side of 16-lamp holes on front side of convex block, 16a-lamp hole on convex block Cover side plate, the detent on 23-mask side plates, 3-lamp bars, 31-light sources, 32-lamp bar terminals, 4-buses, 4a-are electrically connected Link, 5-bus terminals, 6-lens, the strip on rear side of 6a-lens, 7-strip backlight modules, 8-power supplys, 9-arcs Support frame.

Specific embodiment

Below with reference to the Detailed description of the invention in a kind of constructive method embodiment of arc module lamp box of the present invention, to of the invention real The technical solution applied in example is clearly and completely described.

Front side as described in this embodiment, rear side, using front side described in Detailed description of the invention, rear side as foundation.

The step of embodiment of the constructive method of arc module lamp box of the present invention, this composition method, refers to attached drawing 1.It is first First, as shown in Figures 2 to 5, by and the strip support bar 1 of mask and lamp bar installation, be mounted on the face of 1 front side of the support bar Cover 2 and the lamp bar 3 for being mounted on 1 rear side of support bar form a kind of strip backlight module 7；Above-mentioned support bar 1 is by support bar substrate 11,11 rear side of the support bar substrate is uniformly distributed, by two holdings certain distances, mutually put down by several of length direction setting Row, the retaining wall 12 on rear side of the substrate of 11 rear side vertical protrusion of substrate surround light trough 12a and support bar substrate 11 on rear side of substrate Substrate connection of the fixed card slot 13 and 11 front side both sides edge department of support bar substrate that two of rear side are parallel to each other with detent Convex block 14 is integrally formed, and multiple equally distributed lamp hole 12b are equipped in the light trough 12a on rear side of substrate；To improve heat dissipation effect Fruit, which is preferably aluminium alloy extrusions, and is fabricated by extrusion process, in this way, not only good heat dissipation effect, but also Convenient for manufacturing and processing；Its lamp hole 12b is made of punch process.Above-mentioned mask 2 is from panel 21, the panel two sides to rear projection Detent 23 on the mask side plate of mask side plate 22 and 22 rear lateral portion of mask side plate is integrally formed, which is preferably (but not It is limited to) high molecular material (such as: PC, PMMA, PS, PVC, PET, epoxy resin) with astigmatism particle, and pass through injection molding work Skill is fabricated, which can also be used transparent polymer material, is equally fabricated by Shooting Technique；Mask 2 is mounted on On front side of support bar substrate 11, the detent 23 on mask side plate connect convex block 14 with substrate and is connected together.Above-mentioned lamp bar 3 includes circuit Plate, sets lamp bar terminals 32 on the board at the light source 31 being located on front side of the circuit board, and lamp bar 3 is mounted on rear side of substrate In light trough 12a, the light source 31 being arranged on front side of the lamp bar 3 is placed in lamp hole 12b, and the lamp bar terminals 32 being arranged in the lamp bar 3 pass through By electrical interconnection 4a with bus 4 for being electrically connected.Then, as shown in Figure 6 to 7, by more strip backlight modules 7 by longitudinal or Laterally mutually splicing, fixed via fixed card slot 13 and 9 bolt of curved support frame, and by bus 4 with power supply 8 for being electrically connected, from And constitute arc module lamp box.It is embodied from the constructive method of above-mentioned arc module lamp box it is found that since lamp bar 3 is mounted on base In light trough 12a on rear side of plate, so that lamp bar 3 is maintained a certain distance with panel, thus, using the astigmatism angle of light source itself, The hot spot of scattering is obtained in mask；Since support bar substrate 11 is equipped with the light trough 12a on rear side of several equally distributed substrates, And it can be on mask as long as the brightness of light source is consistent equipped with equally distributed lamp hole 12b in the light trough 12a on rear side of substrate Uniform face light is presented；Since mask 2 is from panel 21, the panel two sides to the mask side plate 22 of rear projection and the mask side plate 22 Detent 23 on the mask side plate of rear lateral portion is integrally formed, and the detent 23 on mask side plate connect the engaging of convex block 14 with substrate and connects Connect, therefore, 2 two sides have no occluder of mask so that the strip backlight module mutually splice after be not in apparent concealed wire or dark Spot；Since strip backlight module width dimensions are smaller, the section for constituting arc is also smaller, so that arcwall face is more smooth； Since lamp bar 3 is mounted on 1 rear side of support bar, lamp bar 3 is enabled to implement dismounting on rear side of lamp box, consequently facilitating maintenance.It presses According to the arc module lamp box that the above method is spliced to form, have good appearance, shine uniformly, structure is simple, is easily installed and ties up Protect the advantage of maintenance.

The fixed card slot 13 according to above-described embodiment, as shown in Figures 3 to 5, fixed card slot 13 are a kind of band detents Card slot, it keeps certain distances, the card slot slot arm 3a that is parallel to each other, chooses backward by two and is located at card slot slot arm 13a The notch of rear side to the detent 13b of relatively raised notch and is located on the inside of card slot slot arm 13a to inward side by mirror image Platform grade 13c on the inside of card slot between portion and substrate 11 is constituted, and this fixed card slot 13 is conveniently adjusted position, when installation, Ying Jiang Nut or bolt head slide into fixed position from 1 both ends of support bar.

The support bar 1 according to above-described embodiment, for prevent rainwater from the support bars of 1 both sides of strip backlight module with Enter between mask 2, as shown in Figures 3 to 5, the rear lateral portion of 11 two sides counterpart substrate of support bar substrate connection convex block 14 is set respectively There is the step 11a of substrate two sides, so that the extension of 32 rear side of 11 two sides of support bar substrate and mask side plate forms two encapsulatings Slot 10, and protective rubber is perfused in the glue-filling slot 10.

The support bar 1 according to above-described embodiment, for prevent rainwater or dust from the both ends of strip backlight module 7 into Enter, it usually needs at 7 both ends of strip backlight module, end plate (indicating not in the drawings) is set.For the fixed installation convenient for end plate, As shown in Figures 3 to 5, several are equipped on support bar substrate 11 to arrange by strip direction, mutually keep certain distance, is mutual In parallel, section is at the circular groove 15 on circular substrate.Equally, the spiral shell of the setting cooperation of circular groove 15 on the substrate is corresponded on end plate Nail hole is fixed via screw.

The support bar 1 according to above-described embodiment, after lamp bar 4 is mounted in the light trough 12a on rear side of the substrate, in base Protective rubber (indicating not in the drawings) is perfused in light trough 12a on rear side of plate, to implement to protect to lamp bar 4.

Below with reference to the present invention shine the back light unit of uniform module lamp box Detailed description of the invention to above-described embodiment into One step corrective measure clearly and completely describes.

It is spaced as shown in Fig. 2, Fig. 5, in the light trough 12a on rear side of substrate between one or more lamp hole 12b and is additionally provided with substrate Component 33 in lamp bar 3 in addition to light source is placed in spacious in the light trough on rear side of the substrate by the spacious hole 12c in the light trough of rear side In the 12c of hole so that the circuit board of above-mentioned lamp bar can single-sided aluminum-base plate, to reduce manufacturing cost.

As shown in Fig. 2, Fig. 3, Fig. 5, the spacious hole 11b being additionally provided on support bar substrate 11 on one or more substrates, and Lamp bar terminals 32 are located on front side of circuit board, electrical interconnection 4a is drawn from the spacious hole 11b on substrate, and is connect with bus 4.

As shown in Figure 2 and Figure 3, above-mentioned strip backlight module 7 further includes the bus terminal for the spacious hole 11b being located on a substrate 5, the front side end of the bus terminal 5 is connect with electrical interconnection 4a, and the rear side end of the bus terminal 5 is with power supply 8 for being electrically connected；On It states preferably aviation and patches and bring out, thus, convenient for route and dimension connection shield maintenance.

For more demanding arc module lamp box, to improve light-dispersing effect, as shown in Figure 2, Figure 4 shows, above-mentioned strip backlight Module 7 further includes the lens 6 for being located at lamp hole 12b front side portion, which is preferably concavees lens, which is also preferably that single side is recessed Lens, except it is attached it is shown in addition to, which can also be used moon shape concavees lens or a double concave lens.For the installation convenient for the lens 6, It is equipped with lens attachment device in 6 rear lateral portion of lens, which is that a kind of two for being located at 6 rear lateral portion of lens are mutual Strip 6a on rear side of parallel lens；For the installation of fit lens 6, it is respectively equipped with to front projection in the two sides lamp hole 12b, is mutually flat Convex block 16 on front side of capable lamp hole, the distance of lamp hole front side convex block 16 and the size of lens 6 cooperate, and the convex block on front side of the lamp hole Strip 6a on rear side of the corresponding lens in 16 insides is equipped with the detent 16a on front side of lamp hole on convex block；Lens 6 are mounted on front side of lamp hole 12b Portion is connected together via the strip 6a and detent 6a on convex block on front side of lamp hole on rear side of lens.

Above by the embodiment of constructive method of arc module lamp box, the present invention is described, provided implementation Mode is only as an example, be not intended to limit practical range of the invention.Those skilled in the art both know about, root Upper specific implementation description can do various changes and modifications to the present invention accordingly, it is, therefore, to be understood that removing above-mentioned particular implementation side Outside formula, the present invention can otherwise be implemented, and be not limited to described in description above.

Claims (10)

1. a kind of constructive method of arc module lamp box, it is characterised in that: first by and mask and lamp bar installation strip Support bar (1), the mask (2) being mounted on front side of the support bar (1) and the lamp bar (3) being mounted on rear side of the support bar (1) Form a kind of strip backlight module (7)；The support bar (1) on rear side of: support bar substrate (11), the support bar substrate (11) by pressing Several of length direction setting are uniformly distributed, by two holdings certain distances, be parallel to each other, on rear side of the substrate (11) it is vertical Retaining wall (12) on rear side of the substrate of straight protrusion surrounds two on rear side of light trough (12a) and the support bar substrate (11) on rear side of substrate Substrate connection of the both sides edge department with detent on front side of the fixed card slot (13) and the support bar substrate (11) that item is parallel to each other Convex block (14) is integrally formed, and multiple equally distributed lamp holes (12b) are equipped in the light trough (12a) on rear side of the substrate；Institute Mask (2) is stated from panel (21), the panel two sides to the mask side plate (22) of rear projection and mask side plate (22) rear lateral portion Detent (23) on mask side plate is integrally formed, and the detent (23) on the mask side plate connect convex block (14) card with the substrate Close connection；The lamp bar (3) is mounted on the light trough (12a) on rear side of the substrate Nei, the light source (31) being arranged on front side of the lamp bar (3) It is placed in lamp hole (12b), the lamp bar terminals (32) being arranged in lamp bar (3) are powered via electrical interconnection (4a) and bus (4) Connection；Then more strip backlight modules (7) are pressed into vertical or horizontal mutual splicing, via fixed card slot (13) and curved support Frame (9) bolt is fixed, the bus (4) with power supply (8) for being electrically connected, to constitute arc module lamp box.

2. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

The fixed card slot (13) is located between the light trough (12a) on rear side of the substrate of both sides edge department, it is by two Keep certain distance, the card slot slot arm (13a) for being parallel to each other, choosing backward and the notch being located on rear side of the card slot slot arm (13a) Portion to the detent (13b) of relatively raised notch and is located at card slot slot arm (13a) inside portion to inward side by mirror image Platform grade (13c) on the inside of card slot between the substrate (11) is constituted.

3. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

The rear lateral portion that support bar substrate (11) two sides correspond to substrate connection convex block (14) is respectively equipped with substrate two sides Step (11a), so that the extension on rear side of support bar substrate (11) two sides and the mask side plate (22) forms two fillings Glue groove (10), and protective rubber is perfused in the glue-filling slot (10).

4. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

The support bar substrate (11) is equipped with several and keeps certain distance by the arrangement of strip direction, mutually, be parallel to each other, cut Face is at the circular groove (15) on circular substrate.

5. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

After the lamp bar (3) is mounted in the light trough (12a) on rear side of the substrate, the light trough on rear side of the substrate Protective rubber is perfused in (12a).

6. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

The light trough being additionally provided on rear side of substrate between one or more lamp holes (12b) is spaced in light trough (12a) on rear side of the substrate In spacious hole (12c), the component (33) in lamp bar (3) in addition to light source is placed in the spacious hole in the light trough on rear side of the substrate In (12c).

7. the constructive method of arc module lamp box according to claim 1, it is characterised in that: the support bar substrate (11) the spacious hole (11b) on one or more substrates is additionally provided on；

The lamp bar terminals (32) are located on front side of circuit board, and the electrical interconnection (4a) is from the spacious hole on the substrate (11b) is drawn, and is connect with bus (4).

8. the constructive method of arc module lamp box according to claim 6, it is characterised in that:

The strip backlight module (7) further includes the bus terminal (5) in the spacious hole (11b) being located on a substrate, the bus terminal (5) front side end is connect with the electrical interconnection (4a), and the rear side end of the bus terminal (5) is with power supply (8) for being electrically connected.

9. the constructive method of arc module lamp box according to claim 1, it is characterised in that:

The strip backlight module (7) further includes the lens (6) for being located at the lamp hole (12b) front side portion, which is recessed Mirror, and lens attachment device is equipped in lens (6) rear lateral portion.

10. the constructive method of arc module lamp box according to claim 7, it is characterised in that:

The lens attachment device is the strip that one kind is located on rear side of two lens being parallel to each other of the lens (6) rear lateral portion (6a)；Lamp hole (12b) two sides are respectively equipped with to convex block (16) on front side of front projection, the lamp hole being parallel to each other, lamp hole front side The distance of convex block (16) and the size of the lens (6) cooperate, and correspond to the lens on the inside of convex block (16) on front side of the lamp hole The strip (6a) of rear side is equipped with the detent (16a) on front side of lamp hole on convex block；Before the lens (6) are mounted on the lamp hole (12b) Side is connected together via the strip (6a) on rear side of the lens with the detent (16a) on convex block on front side of the lamp hole.