Motorcycle projection lamp

Abstract

The utility model discloses a motorcycle projection lamp which comprises a projection lamp module, a connecting module and a signal control module, the projection lamp module comprises an outer shell, a heat dissipation support and a plurality of MLA projection modules, the heat dissipation support is provided with a plurality of installation planes, the horizontal projection included angle of every two adjacent installation planes is a, and the horizontal projection included angle of every two adjacent installation planes is a. The plurality of MLA projection modules are respectively installed on the plurality of installation planes, the projection included angle between the adjacent MLA projection modules is a, the shell sleeves the outer sides of the heat dissipation support and the MLA projection modules, the shell is provided with a plurality of transparent windows, and projection light of the MLA projection modules can pass through the transparent windows; the projection lamp of the motorcycle can project pictures on the ground, the effect of increasing the ground width during night driving is achieved, the steering indication function is added, meanwhile, the multiple MLA projection modules are adopted, included angle projection arrangement is conducted, two picture patterns in the front and back of a motorcycle body are achieved, and large-size patterns from the motorcycle body to the ground are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of projection lamp, more specifically relates to a motorcycle car projection lamp. BACKGROUND

[0002] The motorcycle, the sand beach car are without ground steering indicator lamp, without wide show lamp, without ground brake lamp, without welcome carpet when turning, therefore aiming at this kind of situation, the market exists the projection lamp for motorcycle, sand beach car etc. on present market, but the motorcycle projection lamp module structure of present market exists following shortcoming at present: (1) no night travel wide show lamp, the poor safety effect of driving is influenced, (2) no ground steering indicator lamp, cannot prompt driving safety, (3) no ground brake indicator lamp, and the projection lamp of product on present market all adopts the optical way of film, the product volume of film optical scheme is big, leads to not being able to realize the multi-LED dynamic switching in small volume. UTILITY MODEL CONTENTS

[0003] In view of the deficiency of prior art, the utility model provides a motorcycle car projection lamp, which can project pictures on the ground, increase the ground wide show effect during night driving, increase the steering indication function, adopt multiple MLA projection modules and arrange them at an angle, realize two picture patterns in front and back of the vehicle body, and realize large-size patterns from the vehicle body to the ground.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A motorcycle car projection lamp, comprising:

[0006] A projection lamp module, comprising a shell, a heat dissipation support and a plurality of MLA projection modules, the heat dissipation support is provided with a plurality of mounting planes, the horizontal projection angle between two adjacent mounting planes is a, the plurality of MLA projection modules are respectively mounted on the plurality of mounting planes, and the projection angle between adjacent MLA projection modules is a, the shell is sleeved on the outer side of the heat dissipation support and the MLA projection modules, the shell is provided with a plurality of transparent windows, and the projection light of the MLA projection modules can pass through the transparent windows;

[0007] A connecting module is used for connecting the motorcycle handle and the projection lamp module respectively, so as to realize the installation of the motorcycle car projection lamp;

[0008] A signal control module is used for electrically connecting, receiving and controlling the MLA projection modules to project corresponding pictures according to the motorcycle brake signal and the motorcycle steering light signal.

[0009] Further, the connecting module comprises a connecting head, an expansion connecting cylinder and connecting screws, the expansion connecting cylinder is connected with the locomotive body, the connecting head is connected with the expansion connecting cylinder through the connecting screws, the connecting head is provided with a clamping groove, the heat dissipation support is provided with a clamping structure, the clamping structure is inserted into the clamping groove for clamping connection, and the shell is detachably connected with the connecting head.

[0010] Further, the clamping groove comprises an insertion groove and a rotation limiting groove, the insertion groove and the rotation limiting groove are communicated, the clamping structure comprises a clamping plate, the clamping plate can pass through the insertion groove into the rotation limiting groove for rotation and limiting anti-disconnection.

[0011] Further, the shell side is provided with a plurality of first mounting holes, the connecting head side is provided with a plurality of first threaded holes, the first mounting holes are provided with first screws, and the first screws pass through the first mounting holes and extend into the first threaded holes.

[0012] Further, the MLA projection module comprises an MLA lens, a projection module shell, a collimating mirror and a PCB board, the PCB board is provided with a light source lamp, the PCB board is installed at the bottom of the projection module shell, the collimating mirror is installed in the projection module shell and located above the light source lamp, the MLA lens is installed at the top of the projection module shell, the projection module shell is detachably connected with the mounting plane of the heat dissipation support, and the PCB board is in contact with the mounting plane.

[0013] Further, the projection module shell is provided with a plurality of second mounting holes, the mounting plane of the heat dissipation support is provided with a plurality of second threaded holes, the second mounting holes are provided with second screws, and the second screws pass through the second mounting holes and extend into the second threaded holes.

[0014] Further, the signal control module comprises a signal control box and a touch switch, the touch switch is electrically connected with the signal control box, the signal control box is respectively connected with a locomotive brake signal line, a locomotive turn signal line, a power supply line and a projection signal line bundle, and the projection signal line bundle is electrically connected with a plurality of MLA projection modules.

[0015] Further, the projection signal line bundle comprises a first line bundle, a second line bundle and a third line bundle, one end of the first line bundle is electrically connected with the MLA projection module, the other end is provided with a first connector, two ends of the second line bundle are respectively provided with a second connector and a third connector, one end of the third line bundle is electrically connected with the signal control box, the other end is provided with a fourth connector, the first line bundle is located in the shell, the second line bundle is located in the connecting module, the first connector is connected and communicated with the second connector, and the third connector is connected and communicated with the fourth connector.

[0016] Further, the heat dissipation support is provided with a wire harness assembly space and a connector assembly space.

[0017] Further, the shell is provided with a plurality of air holes on the end face away from the connection module, the air holes are communicated with the inside of the shell and the outside, and waterproof and dustproof sheets are arranged at the air holes.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] (1) The projection lamp module can present a picture on the ground, increase the ground width indication in night driving, and increase the driving safety;

[0020] (2) The projection lamp module can present a picture on the ground, increase the steering indication function, and increase the driving safety;

[0021] (3) The projection lamp module produces a flashing light source on the handle, increases the left and right body width indication, and increases the driving safety;

[0022] (4) The projection lamp module is provided with a plurality of MLA projection modules, and the projection direction adopts an included angle projection scheme, so that two picture patterns of the vehicle body are realized;

[0023] (5) The projection lamp module can adopt different color LEDs, and the aesthetic effect and scene atmosphere are increased.

[0024] The utility model discloses a projection lamp module, a connection module and a signal control module, utilize the projection lamp module to image and project on the ground, install the motorcycle projection lamp on the motorcycle through the connection module, and utilize the signal control module to realize the signal synchronization on the motorcycle, realize the projection pattern switching of the projection lamp module, and also can manually open and close the projection lamp module.

[0025] In the utility model, two MLA projection modules are arranged, the two MLA projection modules form a projection light ray of a included angle, two projection patterns on the ground are realized, the large size pattern from the vehicle body to the ground is realized, the optical range of the MLA projection module is increased, one pattern is a steering projection lamp, can be switched to a brake lamp, and the other pattern is generally a parking pattern, and the MLA pattern can cut another picture. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to these drawings without paying the creative labor, wherein:

[0027] Figure 1 Fig. 1 is a schematic diagram of a motorcycle projection lamp installed on a motorcycle for use;

[0028] Figure 2 Fig. 2 is a schematic diagram of a motorcycle projection lamp;

[0029] Figure 3 Fig. 3 is a schematic diagram of a projection lamp module and a connecting module;

[0030] Figure 4 Fig. 4 is a schematic diagram of projection of two MLA projection modules forming an angle a;

[0031] Figure 5 Fig. 5 is an exploded view of an MLA projection module;

[0032] Figure 6 Fig. 6 is a schematic diagram of an installation combination of an MLA projection module;

[0033] Figure 7 Fig. 7 is a schematic diagram of Figure 1 Fig. 8 is an enlarged view of structure at A in Fig. 7;

[0034] Figure 8 Fig. 9 is a schematic diagram of a heat dissipation support;

[0035] Figure 9 Fig. 10 is a schematic diagram of a connecting head.

[0036] In the figure, the following are marked: 1, housing; 2, expansion connecting cylinder; 3, signal control box; 4, touch switch; 5, motorcycle brake signal line; 6, motorcycle turn signal line; 7, power line; 8, transparent window; 9, waterproof and dustproof sheet; 10, heat dissipation support; 101, installation plane; 1002, clamping plate; 1003, wire harness assembly space; 1004, second threaded hole; 11, MLA projection module; 1101, MLA lens; 1102, projection module housing; 1103, collimating mirror; 1104, light source lamp; 1105, second mounting hole; 12, PCB; 13, connecting screw; 14, connecting head; 1401, extension slot; 1402, rotation limiting slot; 1403, first threaded hole; 15, first wire harness; 16, second wire harness; 17, third wire harness; 18, first connector; 19, second connector; 20, third connector; 21, first screw; 22, first mounting hole; 23, air vent. DETAILED DESCRIPTION

[0037] In the description of the utility model, it is necessary to explain that for the direction words, if the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0038] In addition, if the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and in the description of the utility model, the meaning of "several", "several" is two or more than two, unless otherwise explicitly specified.

[0039] A motorcycle handlebar projection lamp, as shown in Figures 1-9 , comprising:

[0040] The projection lamp module comprises a shell 1, a heat dissipation support 10 and a plurality of MLA projection modules 11, a plurality of mounting planes 1001 are arranged on the heat dissipation support 10, the horizontal projection included angle of two adjacent mounting planes 1001 is a, a plurality of MLA projection modules 11 are respectively mounted on a plurality of mounting planes 1001, and the projection included angle between adjacent MLA projection modules 11 is a, the a is an included angle less than 180°, the shell 1 is sleeved on the outer side of the heat dissipation support 10 and the MLA projection module 11, a plurality of transparent windows 8 are arranged on the shell 1, and the projection light of the MLA projection module 11 can pass through the transparent window 8.

[0041] The connecting module is used for respectively connecting the motorcycle handlebar and the projection lamp module, and realizes the installation of the motorcycle handlebar projection lamp.

[0042] The signal control module is used for electrically connecting, receiving and controlling the MLA projection module 11 to project corresponding projection according to the motorcycle brake signal and the motorcycle turn signal.

[0043] Preferably, as shown in Figures 3-4 , the MLA projection module 11 is provided with two, the mounting plane 1001 on the heat dissipation support 10 is also provided with two, and the two MLA projection modules 11 are respectively mounted on the two mounting planes 1001 and form the projection light of the included angle a.

[0044] Preferably, asFigure 3 As shown in the figure, the connecting module comprises a connecting head 14, an expansion connecting cylinder 2 connected with the motorcycle body, and a connecting screw 13, the connecting head 14 is connected with the expansion connecting cylinder 2 through the connecting screw 13, the connecting head 14 is provided with a clamping groove, the heat dissipation support 10 is provided with a clamping structure, the clamping structure is inserted into the clamping groove for clamping connection, and the shell 1 is detachably connected with the connecting head 14.

[0045] Specifically, the connecting screw 13 is installed on the motorcycle handle, an assembly is formed by sleeving the expansion connecting cylinder 2 on the motorcycle handle, then the MLA projection module 11, the heat dissipation support 10 and the shell 1 are assembled, finally the first screw 21 is fastened and rotation-stopped, and finally the overall structure of the motorcycle projection lamp is formed.

[0046] Preferably, as shown in the figure, Figures 8-9 As shown in the figure, the clamping groove comprises an insertion groove 1401 and a rotation limiting groove 1402, the insertion groove 1401 and the rotation limiting groove 1402 are communicated, the clamping structure comprises a clamping plate 1002, the clamping plate 1002 can pass through the insertion groove 1401 and enter the rotation limiting groove 1402 for rotation and limiting anti-disconnection;

[0047] Specifically, the insertion groove 1401 and the rotation limiting groove 1402 are each provided with three, the clamping plate 1002 is also provided with three, when the heat dissipation support 10 is assembled with the connecting head 14, the heat dissipation support 10 is first inserted into the connecting head 14, when inserted, the clamping plate 1002 is first inserted into the insertion groove 1401, then the heat dissipation support 10 is rotated, so that the clamping plate 1002 enters the rotation limiting groove 1402, thereby realizing the clamping and limiting connection of the heat dissipation support 10 and the connecting head 14.

[0048] Preferably, as shown in the figure, Figure 3 As shown in the figure, the shell 1 is provided with a plurality of first mounting holes 22 on the side surface, the connecting head 14 is provided with a plurality of first threaded holes 1403 on the side surface, the first mounting holes 22 are provided with first screws 21, the first screws 21 pass through the first mounting holes 22 and extend into the first threaded holes 1403, thereby realizing the detachable connection of the shell 1 and the connecting head 14.

[0049] Preferably, as shown in the figure, Figure 5As shown in the figure, the MLA projection module 11 comprises an MLA lens 1101, a projection module shell 1102, a collimating mirror 1103 and a PCB board 12, the PCB board 12 is provided with a light source lamp 1104, the PCB board 12 is installed at the bottom of the projection module shell 1102, the collimating mirror 1103 is installed in the projection module shell 1102 and above the light source lamp 1104, the MLA lens 1101 is installed at the top of the projection module shell 1102, the projection module shell 1102 is detachably connected with the mounting plane 1001 of the heat dissipation support 10, and the PCB board 12 is in contact with the mounting plane 1001 to ensure the heat dissipation efficiency.

[0050] Preferably, the light source lamp 1104 adopts an LED lamp.

[0051] Preferably, as shown in the figure, Figure 5 Preferably, as shown in the figure, the top and bottom of the projection module shell 1102 are provided with buckles, and the collimating mirror 1103 and the MLA lens 1101 are installed on the projection module shell 1102 through the buckles.

[0052] Preferably, as shown in the figure, Figure 6 Preferably, as shown in the figure, Figure 8 Preferably, as shown in the figure, the projection module shell 1102 is provided with a plurality of second mounting holes 1105, the mounting plane 1001 of the heat dissipation support 10 is provided with a plurality of second threaded holes 1004, the second mounting holes 1105 are provided with second screws, the second screws pass through the second mounting holes 1105 and extend into the second threaded holes 1004 to realize the detachable connection of the projection module shell 1102 and the mounting plane 1001.

[0053] Preferably, as shown in the figure, Figure 2 Preferably, as shown in the figure, the signal control module comprises a signal control box 3 and a touch switch 4, the touch switch 4 is electrically connected with the signal control box 3, the signal control box 3 is respectively connected with a locomotive brake signal line 5, a locomotive turn signal line 6, a power supply line 7 and a projection signal line bundle, the projection signal line bundle is electrically connected with a plurality of MLA projection modules 11;

[0054] Specifically, the MLA projection module 11, the locomotive brake signal line 5, the locomotive turn signal line 6, the power supply interface and the signal control box 3 are in electrical communication, the signal synchronization on the locomotive is realized through the signal control box 3, the connection scheme is as shown in the figure, Figure 2 to realize the pattern switching; and the picture pattern opening and closing of the projection lamp can be realized by the touch switch 4.

[0055] Preferably, as shown in the figure, Figures 2-3As shown, the projection signal wire harness includes a first wire harness 15, a second wire harness 16 and a third wire harness 17, one end of the first wire harness 15 is electrically connected with the MLA projection module 11, the other end is provided with a first connector 18, two ends of the second wire harness 16 are respectively provided with a second connector 19 and a third connector 20, one end of the third wire harness 17 is electrically connected with the signal control box 3, the other end is provided with a fourth connector, the first wire harness 15 is located in the shell 1, the second wire harness 16 is located in the connection module, the first connector 18 is connected in communication with the second connector 19, and the third connector 20 is connected in communication with the fourth connector;

[0056] Specifically, by setting the projection signal wire harness into three wire harnesses of the first wire harness 15, the second wire harness 16 and the third wire harness 17, the projection lamp module, the connection module and the signal control module can be disassembled from each other without being affected by the wire harness, and after disassembling, the connecting heads connected with each other are disconnected, and after reassembling, the two connecting heads are connected together, so that the assembly and the later disassembly and maintenance are facilitated.

[0057] Preferably, as shown in the figure, Figure 8 As shown, the heat dissipation support 10 is provided with a wire harness assembly space 1003 and a connector assembly space, so that the first wire harness 15 is conveniently installed and arranged through the wire harness assembly space 1003, and the first connector 18 is installed and arranged through the connector assembly space.

[0058] Preferably, as shown in the figure, Figure 7 As shown, the shell 1 is provided with a plurality of air holes 23 on the end surface away from the connection module, the plurality of air holes 23 communicate the inside of the shell 1 with the outside, and a waterproof and dustproof sheet 9 is arranged at the plurality of air holes 23, and the waterproof and dustproof sheet 9 is installed in the inside of the shell 1.

[0059] The inside of the shell 1 is ventilated and cooled through the air holes 23, the internal heat of the MLA projection module 11 is reduced, and the waterproof and dustproof sheet 9 is arranged to prevent dust and water from entering the shell 1 through the air holes 23.

[0060] Assembly process:

[0061] ①: On the projection module shell 1102, the collimating mirror 1103 and the MLA lens 1101 are inserted in a buckle manner, and the PCB board 12 is installed at the bottom to form the MLA projection module 11;

[0062] ②: The MLA projection module 11 is connected with the heat dissipation support 10, when connected, the projection module shell 1102 is installed on the installation plane 1001 of the heat dissipation support 10 through the second screw, and the wires are arranged into the corresponding positions through the wire harness assembly space 1003, and the connectors are assembled and buckled in the connector assembly space;

[0063] 3. Then connect the connecting screw 13 with the connecting cylinder 2 and the motorcycle body, and fix the connecting cylinder 2 and the handlebar through expansion;

[0064] 4. Then assemble the transparent window 8, the dustproof sheet 9 and the shell 1;

[0065] 5. Complete the assembly scheme of the projection lamp module, assemble the signal control box 3 and the whole vehicle, and finally realize the ground pattern effect.

[0066] Advantages:

[0067] (1) The projection lamp module can present a picture on the ground, increase the ground width indicating effect in night driving, and increase the driving safety;

[0068] (2) The projection lamp module can present a picture on the ground, increase the steering indicating function, and increase the driving safety;

[0069] (3) The projection lamp module produces a flashing light source on the handlebar, increases the left and right width indicating effect of the vehicle body, and increases the driving safety;

[0070] (4) The projection lamp module is internally provided with a plurality of MLA projection modules 11, and the projection direction adopts an included angle projection scheme, so that two picture patterns of the vehicle body are realized;

[0071] (5) The projection lamp module can adopt different color LEDs, and increase the aesthetic effect and scene atmosphere.

[0072] The utility model discloses a projection lamp module, connecting module and signal control module are set up, utilize the projection lamp module to carry out imaging and project to the ground, install this motorcycle projection lamp on the motorcycle through the connecting module, and utilize the signal control module to realize the signal synchronization on the motorcycle, realize the projection pattern switching of projection lamp module, and still can manually open and close to projection lamp module;

[0073] In the utility model, through setting up two MLA projection modules 11, two MLA projection modules 11 form a projection light of a included angle, realize two projection patterns on the ground, realize the large -size pattern from the vehicle body to the ground, increase the optical range of MLA projection module 11 simultaneously, one pattern is steering projection lamp, can be switched to brake lamp, another pattern is generally parking pattern, and MLA pattern can cut another picture.

[0074] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the protection scope of the present application for the technical scheme under the idea of the present application.All should be pointed out, for the ordinary skill in the art of the present technology, under the prerequisite of not departing from the principle of the present application, a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A motorcycle projection lamp characterized by, The application relates to a motorcycle projection lamp system. The projection lamp module comprises a shell, a heat dissipation support and a plurality of MLA projection modules, the heat dissipation support is provided with a plurality of mounting planes, the horizontal projection included angle between two adjacent mounting planes is a, the plurality of MLA projection modules are respectively mounted on the plurality of mounting planes, and the projection included angle between two adjacent MLA projection modules is a, the shell is sleeved on the outer side of the heat dissipation support and the MLA projection modules, the shell is provided with a plurality of transparent windows, and the projection light of the MLA projection modules can pass through the transparent windows. The connection module is used for connecting the motorcycle handle and the projection lamp module respectively, so that the motorcycle handle and the projection lamp are mounted. The signal control module is used for electrically connecting, receiving and controlling the MLA projection modules to carry out corresponding projection according to the motorcycle brake signal and the motorcycle turn signal.

2. A motorcycle projection lamp according to claim 1, characterized in that: The connection module comprises a connecting head, an expansion connecting barrel and connecting screws, the expansion connecting barrel is connected with the motorcycle body, the connecting head is connected with the expansion connecting barrel through the connecting screws, the connecting head is provided with a clamping groove, the heat dissipation support is provided with a clamping structure, the clamping structure is inserted into the clamping groove to be clamped and connected, and the shell is detachably connected with the connecting head.

3. A motorcycle projection lamp according to claim 2, wherein: The clamping groove comprises an insertion groove and a rotary limiting groove, the insertion groove and the rotary limiting groove are communicated, the clamping structure comprises a clamping plate, and the clamping plate can pass through the insertion groove to enter the rotary limiting groove to rotate and realize limiting and anti-disconnection.

4. A motorcycle projection lamp according to claim 2, wherein: The shell is provided with a plurality of first mounting holes on the side, the connecting head is provided with a plurality of first threaded holes on the side, the first mounting holes are provided with first screws, and the first screws pass through the first mounting holes and are inserted into the first threaded holes.

5. A motorcycle projection lamp according to claim 1, characterized in that: The MLA projection module comprises an MLA lens, a projection module shell, a collimating mirror and a PCB, the PCB is provided with a light source lamp, the PCB is mounted at the bottom of the projection module shell, the collimating mirror is mounted in the projection module shell and located above the light source lamp, the MLA lens is mounted at the top of the projection module shell, the projection module shell is detachably connected with the mounting plane of the heat dissipation support, and the PCB is in contact with the mounting plane.

6. A motorcycle projection lamp according to claim 5, wherein: The projection module shell is provided with a plurality of second mounting holes, the mounting plane of the heat dissipation support is provided with a plurality of second threaded holes, the second mounting holes are provided with second screws, and the second screws pass through the second mounting holes and are inserted into the second threaded holes.

7. A motorcycle projection lamp according to claim 1, characterized in that: The signal control module comprises a signal control box and a touch switch, the touch switch is electrically connected with the signal control box, the signal control box is connected with a motorcycle brake signal line, a motorcycle turn signal line, a power supply line and a projection signal line bundle respectively, and the projection signal line bundle is electrically connected with the plurality of MLA projection modules.

8. A motorcycle projection lamp according to claim 7, characterized in that: The projection signal wire harness comprises a first wire harness, a second wire harness and a third wire harness, one end of the first wire harness is electrically connected with the MLA projection module, the other end is provided with a first connector, two ends of the second wire harness are respectively provided with a second connector and a third connector, one end of the third wire harness is electrically connected with the signal control box, the other end is provided with a fourth connector, the first wire harness is located in the shell, the second wire harness is located in the connection module, the first connector is connected and communicated with the second connector, and the third connector is connected and communicated with the fourth connector.

9. A motorcycle projection lamp according to claim 8, characterized in that: The heat dissipation support is provided with a wire harness assembly space and a connector assembly space.

10. A motorcycle projection lamp according to claim 1, characterized in that: A plurality of air holes are arranged on the end face of the shell away from the connection module, the plurality of air holes are communicated between the inside of the shell and the outside, waterproof and dustproof sheets are arranged at the plurality of air holes, and the waterproof and dustproof sheets are mounted in the inside of the shell.

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