A ceiling fan and a manufacturing method of the ceiling fan blades

Abstract

The present invention discloses a ceiling fan, comprising: a housing, a motor is installed inside the housing, at least three connecting members are connected to the motor, and ceiling fan blades are detachably connected to each connecting member. The ceiling fan blades include an inner core layer, a blade body layer is connected outside the inner core layer, moisture-proof covering layers are provided at both the upper and lower ends of the blade body layer, and an anti-static covering layer is further provided on the upper side of the blade body layer. The blade body layer is an accumulative wing-shaped blade, and the blade body layer includes an upper housing and a lower housing that are mutually clamped, and both the upper housing and the lower housing are of a hollow structure, and honeycomb structures are provided inside the hollow parts of the upper housing and the lower housing. A gap is formed between the connection surfaces of the upper housing and the lower housing, a sealing glue coating is provided between the gaps, and a connection spray coating is sprayed along the circumferences of the upper housing and the lower housing. The purpose of the present invention is to overcome the deficiencies of the prior art and provide a ceiling fan with a simple structure and environmental protection. The present invention also provides a manufacturing method for the ceiling fan blades.

Description

Technical Field

[0001] The present invention relates to a ceiling fan and a manufacturing method of the ceiling fan blades. Background Art

[0002] Most of the existing ceiling fan blades are made of composite boards. Such composite board blades are heavy, use more materials, cause waste during processing, and cannot be recycled and reused after damage, which is not environmentally friendly.

[0003] The present invention is developed based on the above deficiencies. Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a ceiling fan with a simple structure and environmental protection.

[0005] The present invention also provides a manufacturing method of the ceiling fan blades.

[0006] A ceiling fan of the present invention includes: a housing 1, a motor 2 is installed inside the housing 1, at least three connecting members 3 are connected to the motor 2, and a ceiling fan blade 4 is detachably connected to each connecting member 3. The ceiling fan blade 4 includes a core layer 41 made of carbon fiber material, a blade body layer 42 made of model pulp material is connected to the outside of the core layer 41, moisture-proof coating layers 43 are provided at both upper and lower ends of the blade body layer 42, and an anti-static coating layer 44 is further provided on the upper side of the blade body layer 42. The blade body layer 42 is an accumulative wing-shaped leaf, and the blade body layer 42 includes an upper housing 421 and a lower housing 422 that is snap-connected to the upper housing 421. Both the upper housing 421 and the lower housing 422 are hollow structures, and honeycomb structures 401 are provided inside the hollow parts of the upper housing 421 and the lower housing 422. A gap is formed between the connection surfaces of the upper housing 421 and the lower housing 422, a sealant coating 423 is provided in the gap, and a connection spray coating 45 is sprayed along the circumferences of the upper housing 421 and the lower housing 422.

[0007] The lower housing 422 includes a lower connecting plate 4221, a protruding connection protrusion 4222 is provided on the lower connecting plate 4221, and a plurality of protruding ribs 4223 are further provided on the lower connecting plate 4221. The upper housing 421 includes an upper connecting plate 4211, a protruding portion 4212 is provided on the upper connecting plate 4211, and a fixing card slot 4213 capable of being snap-connected to the ribs 4223 is provided on the protruding portion 4212. The connection protrusion 4222 and the protruding portion 4212 form the gap when the lower housing 422 and the upper connecting plate 4211 are snap-connected to each other.

[0008] The upper housing 421 and the lower housing 422 both include a fixed connection portion 51 in the shape of a flat plate. The trailing edge of the fixed connection portion 51 is connected to a blade portion 52, and a transition portion 53 is provided between the fixed connection portion 51 and the blade portion 52, which can make the blade portion 52 inclined with respect to the horizontal plane.

[0009] The head to the end of the transition portion 53 is twisted, so that one side of the blade portion 52 bulges upward and the other side bulges downward, so that the blade portion 52 is inclined in the forward direction of rotation.

[0010] The transition portion 53 makes the inclination angle α between the blade portion 52 and the water surface range from 15° to 30°.

[0011] A protrusion 4214 is provided on the upper surface of the upper housing 421 near the tail. One side of the protrusion 4214 is provided with an arc surface, and the other side of the protrusion 4214 is provided with a vertical surface.

[0012] The connecting member 3 is a connecting piece. One end of the connecting piece is fixed to the motor 2, and a quick-installation structure 6 capable of connecting the two is provided between the other end of the connecting piece and the ceiling fan blade 4.

[0013] A plurality of connection holes 31 are provided on the connecting member 3. Mounting holes 402 corresponding to the positions of the plurality of connection holes 31 are provided on the ceiling fan blade 4. The quick-installation structure 6 includes a connection column 61 that can pass through the connecting member 3 and the ceiling fan blade 4 at the same time. A locking member 62 is connected to the connection column 61, which can simultaneously abut against the surfaces of the connection column 61 and the ceiling fan blade 4 when engaged with the connection column 61 to fix the ceiling fan blade 4 and the connecting member 3.

[0014] A rubber ring 403 is installed in the installation hole 402. A channel 4031 through which the connecting column 61 can pass is provided in the middle of the rubber ring 403. Convex rings 4032 are provided at both ends of the rubber ring 403. A clamping groove 4033 which can be attached to the upper and lower surfaces of the ceiling fan blade 4 and can bite the ceiling fan blade 4 is provided between the two convex rings 4032. The locking member 62 is a locking piece arranged in a ring shape. An opening clamping groove 621 into which the connecting column 61 can be inserted is provided on the locking piece. Extension parts 622 extending outwards are provided at both ends of the locking piece located at the opening clamping groove 621. A through hole 6221 into which a quick-installation tool can be inserted is provided on the extension part 622. When the quick-installation tool is inserted into the through hole 6221 and a force is applied, the opening of the opening clamping groove 621 can be enlarged to allow the connecting column 61 to be inserted. The head of the connecting column 61 is in an umbrella shape. A locking groove 611 into which the locking member 62 can be inserted is further provided on the connecting column 61. The diameter of the connecting column 61 at the position of the locking groove 611 is smaller than other parts. When the locking piece is inserted into the locking groove 611, the upper end and the lower end of the locking piece respectively abut against the inner wall surfaces of the rubber ring 403 and the connecting column 61 to lock the connecting member 3 and the ceiling fan blade 4.

[0015] A manufacturing method of a ceiling fan blade of the present invention uses the ceiling fan as described above and includes the following steps:

[0016] a. Cut the carbon fiber sheet along the contour of the ceiling fan blade to obtain the inner core layer 41;

[0017] b. Respectively introduce the model pulp into the molds corresponding to the upper shell 421 and the lower shell 422 to process the upper shell 421 and the lower shell 422;

[0018] c. After performing hole processing and groove processing on the inner core layer 41, brush glue and then install it on the lower shell 422;

[0019] d. Brush glue on the corresponding joint surfaces of the lower shell 422 and the upper shell 421, and then cover the upper shell 421 on the lower shell 422;

[0020] e. Coat a moisture-proof coating layer 43 on the outer surfaces of the upper shell 421 and the lower shell 422;

[0021] f. Also coat an anti-static coating layer 44 on the outer surface of the upper shell 421;

[0022] g. Spray a connecting spray coating layer 45 along the sides of the upper shell 421 and the lower shell 422.

[0023] Compared with the prior art, the present invention has the following advantages: In the ceiling fan of the present invention, the ceiling fan blades are provided with an inner core layer. Since the inner core layer is a thin sheet made of carbon fiber material, and an upper shell and a lower shell made of model pulp material are provided on both sides of the inner core layer, and both the upper shell and the lower shell are hollow, and a honeycomb structure is provided in the hollow part, which can reduce the weight of the entire ceiling fan blade, and the honeycomb structure is evenly distributed. When the ceiling fan blade rotates, it is more balanced and will not show cheap up and down offset jitter. Between the inner core layer and the upper and lower shells, and between the upper and lower shells, a glue with strong viscosity is used for connection, and the fixation is stable. Moisture-proof coating layers are pasted on the surfaces of the upper shell and the lower shell for waterproofing and moisture-proofing, and an anti-static coating layer is also pasted on the surface of the upper shell, which can prevent the ceiling fan blade from getting dusty. At the same time, the connection spray coating also uses glue to fix the upper shell and the lower shell more firmly. If the ceiling fan blade is damaged, since the inner core layer is made of carbon fiber material and has high compressive resistance, the inner core layer can still be recovered and reused. Moreover, the blade body layer is made of model pulp, and even if it is damaged, it can still be recycled and reused, which is more environmentally friendly. The overall weight of the ceiling fan connected with this ceiling fan blade is lighter, which is convenient for users to hang. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of the ceiling fan of the present invention;

[0025] Figure 2 is a cross-sectional view of the ceiling fan blade in the ceiling fan of the present invention;

[0026] Figure 3 is a schematic diagram of the lower shell of the ceiling fan of the present invention;

[0027] Figure 4 is a schematic diagram of the upper shell of the ceiling fan of the present invention;

[0028] Figure 5 is a perspective view of the ceiling fan blade in the ceiling fan of the present invention;

[0029] Figure 6 is a plan view of the ceiling fan blade in the ceiling fan of the present invention;

[0030] Figure 7 is a perspective view of the ceiling fan blade and the connecting member when they are connected in the ceiling fan of the present invention;

[0031] Figure 8 is an exploded view of the ceiling fan blade and the connecting member in the ceiling fan of the present invention;

[0032] Figure 9 is Figure 7 an enlarged view of area A in

[0033] Figure 10 is an exploded view of the quick-installation structure 6 in the ceiling fan of the invention. Detailed implementation mode

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] As Figures 1 to 10 shown, the present invention provides a ceiling fan, comprising: a housing 1, a motor 2 is installed in the housing 1, at least three connecting members 3 are connected to the motor 2, and ceiling fan blades 4 are detachably connected to each of the connecting members 3. The ceiling fan blades 4 include a core layer 41 made of carbon fiber material, a blade body layer 42 made of model pulp material is connected to the outside of the core layer 41, moisture-proof coating layers 43 are provided at both the upper and lower ends of the blade body layer 42, and an anti-static coating layer 44 is further provided on the upper side of the blade body layer 42. The blade body layer 42 is an accumulative wing-shaped blade, and the blade body layer 42 includes an upper housing 421 and a lower housing 422 that are mutually clamped with the upper housing 421. Both the upper housing 421 and the lower housing 422 are of a hollow structure, and honeycomb structures 401 are provided in the hollow parts of the upper housing 421 and the lower housing 422. A gap is formed between the connecting surfaces of the upper housing 421 and the lower housing 422, a sealant coating 423 is provided between the gaps, and a connecting spray coating 45 is sprayed along the periphery of the upper housing 421 and the lower housing 422.

[0036] In the ceiling fan blade 4 of the present invention, an inner core layer 41 is provided. Since the inner core layer 41 is a thin sheet made of carbon fiber material, an upper shell 421 and a lower shell 422 made of model pulp material are provided on both sides of the inner core layer 41. Both the upper shell 421 and the lower shell 422 are hollow, and a honeycomb structure 401 is provided in the hollow part, which can reduce the weight of the entire ceiling fan blade 4. And the honeycomb structure 401 is evenly distributed. Therefore, when the ceiling fan blade rotates, it is more balanced and will not show cheap up and down offset jitter. Between the inner core layer 41 and the upper shell 421 and the lower shell 422, and between the upper shell 421 and the lower shell 422, a glue with strong viscosity is used for connection, and the fixation is firm. A moisture-proof covering layer 43 is pasted on the surfaces of the upper shell 421 and the lower shell 422 for waterproofing and moisture-proofing. And an anti-static covering layer 44 is also pasted on the surface of the upper shell 421, which can prevent the ceiling fan blade 4 from attracting dust. At the same time, the connecting spray coating 45 also uses glue to fix the upper shell 421 and the lower shell 422 more firmly. If the ceiling fan blade 4 is damaged, since the inner core layer 41 is made of carbon fiber material and has high compressive strength, the inner core layer 41 can still be recovered and used. Moreover, the blade body layer 42 is made of model pulp. Even if it is damaged, it can still be recycled and reused, which is more environmentally friendly. The overall weight of the ceiling fan connected with the ceiling fan blade 4 is lighter, which is convenient for users to hang. The anti-static covering layer is a sticker coated with at least one of antistatic agent TM, octadecyl diethanolamine, PEG, methyl acrylate, polyethylene oxide and polyether ester amide. The moisture-proof covering layer 43 is one of a melamine polyester surface layer, a PVC wood grain veneer layer, and a water transfer printing surface layer. The glue is PUR hot melt glue. The connecting spray coating 45 is an RTV coating with waterproof and moisture-proof functions. The model pulp is the pulp used to manufacture pulp molded products. For example, the pulp mentioned in the article "Research on the Strength Performance of Pulp Molded Products Based on In-Pulp Additives" with the ISSN of CNKI:SUN:SYHH.0.2020-01-033 mentions a variety of additives in the pulp.

[0037] Such as Figures 3 to 4As shown in the figure, the lower housing 422 includes a lower connecting plate 4221. A protruding connecting protrusion 4222 is provided on the lower connecting plate 4221, and a plurality of protruding ribs 4223 are also provided on the lower connecting plate 4221. The upper housing 421 includes an upper connecting plate 4211. A protruding portion 4212 is provided on the upper connecting plate 4211, and a fixing card slot 4213 capable of being snap-fitted with the ribs 4223 is provided on the protruding portion 4212. The connecting protrusion 4222 and the protruding portion 4212 form the gap when the lower housing 422 and the upper connecting plate 4211 are snap-fitted with each other. The ribs 4223 and the fixing card slots 4213 are not only used to distinguish the lower housing 422 and the upper housing 421, but also can improve the overall support strength and stress strength of the blade body layer 42 when the ribs 4223 and the fixing card slots 4213 are cooperatively fixed.

[0038] As Figures 5 to 6 shown in the figure, both the upper housing 421 and the lower housing 422 include a flat-shaped fixing portion 51. The trailing edge of the fixing portion 51 is connected to a blade portion 52, and a transition portion 53 capable of making the blade portion 52 inclined with respect to the horizontal plane is provided between the fixing portion 51 and the blade portion 52. At this time, the wind blown out by the blade portion 52 towards the lower part of the ceiling fan has a certain angle, thereby simulating natural wind and making the blown wind softer and wider in coverage.

[0039] As Figures 5 to 6 shown in the figure, the head to the end of the transition portion 53 is twisted, so that one side of the blade portion 52 protrudes upward and the other side protrudes downward, so that the blade portion 52 is inclined in the forward direction of rotation. The transition portion 53 makes the inclination angle α between the blade portion 52 and the horizontal plane in the range of 15° to 30°. The blade body layer 42 is a large-area airfoil-shaped blade. When the inclination angle α between the blade portion 52 and the horizontal plane is set in the range of 15° to 30°, the air flow can be cut more finely and softly, the air flow can be cut evenly and densely, and the softness and warmth of natural wind can be restored better, which is more in line with the comfortable wind-receiving points of the human body. And the ultra-long air supply distance of the blade body layer 42 makes the air-conditioning cold air evenly distributed in the room.

[0040] As Figure 5 shown in the figure, a protrusion 4214 is provided on the upper surface of the upper housing 421 and near the tail. One side of the protrusion 4214 is arc-shaped, and one side of the protrusion 4214 is vertical. The protrusion 4214 has a convex arc surface, so it is smoother when cutting the air flow, can reduce the obstruction received by the tail, and reduce the noise when the ceiling fan blade 4 cuts the air flow.

[0041] As Figure 7As shown, the connecting member 3 is a connecting piece, one end of the connecting piece is fixed to the motor 2, and a quick installation structure 6 capable of connecting the other end of the connecting piece and the ceiling fan blade 4 is provided therebetween. The quick installation structure 6 facilitates quick installation by the user.

[0042] As Figure 8 and Figure 9 As shown, a plurality of connecting holes 31 are provided on the connecting member 3, mounting holes 402 corresponding to the positions of the plurality of connecting holes 31 are provided on the ceiling fan blade 4, the quick installation structure 6 includes a connecting column 61 capable of passing through the connecting member 3 and the ceiling fan blade 4 simultaneously, and a locking member 62 is connected to the connecting column 61, which can simultaneously abut against the surfaces of the connecting column 61 and the ceiling fan blade 4 when engaged with the connecting column 61 to fix the ceiling fan blade 4 and the connecting member 3.

[0043] As Figures 8 to 10As shown, a rubber ring 403 is installed in the installation hole 402. A channel 4031 through which the connecting column 61 can pass is provided in the middle of the rubber ring 403. Convex rings 4032 are provided at both ends of the rubber ring 403. An engaging card slot 4033 is provided between the two convex rings 4032, which can be attached to the upper and lower surfaces of the ceiling fan blade 4 and can bite the ceiling fan blade 4. The locking member 62 is a locking piece arranged in a ring shape. An opening card slot 621 into which the connecting column 61 can be inserted is provided on the locking piece. Extension parts 622 extending outwards are provided at both ends of the locking piece located at the opening card slot 621. A through hole 6221 into which a quick installation tool can be inserted is provided on the extension part 622. When the quick installation tool is inserted into the through hole 6221 and a force is applied, the opening of the opening card slot 621 can be enlarged to allow the connecting column 61 to be inserted. The head of the connecting column 61 is in an umbrella shape. A locking slot 611 into which the locking member 62 can be inserted is further provided on the connecting column 61. The diameter of the connecting column 61 at the position of the locking slot 611 is smaller than other parts. When the locking piece is inserted into the locking slot 611, the upper end and the lower end of the locking piece respectively abut against the inner wall surfaces of the rubber ring 403 and the connecting column 61 to lock the connecting member 3 and the ceiling fan blade 4. The connecting member 3 is a fan blade yoke. When the fan blade yoke is connected to the ceiling fan blade 4, first install the rubber ring 403 into the installation hole 402 of the ceiling fan blade 4 so that the rubber ring 403 can bite the side wall of the installation hole 402. Then align the installed ceiling fan blade 4 with the connection hole 31 on the connecting member 3. At this time, the channel 4031 on the rubber ring 403 is aligned with the connection hole 31. Pass the connecting column 61 through the connection hole 31 and the channel 4031 in sequence and expose the locking slot 611 to the other side of the ceiling fan blade 4. Then insert the circlip pliers into the through hole 6221 on the extension part 622, and then press the circlip pliers. At this time, the circlip pliers expand the notch of the opening card slot 621 of the locking member 62, and insert the locking member 62 into the locking slot 611 of the connecting column 61. Let go. Since the locking member 62 has a certain deformation ability, the locking member 62 can bite on the connecting column 61 through the circumferential side surface of the opening card slot 621 when resetting. At this time, the upper end and the lower end of the locking member 62 respectively abut against the inner wall surfaces of the rubber ring 403 and the connecting column 61 to lock the connecting member 3 and the ceiling fan blade 4.

[0044] On the other hand, the present invention also provides a manufacturing method of a ceiling fan blade, including the following steps:

[0045] a. Cut the carbon fiber sheet along the contour of the ceiling fan blade to obtain the inner core layer 41;

[0046] b. Respectively introduce the model pulp into the molds corresponding to the upper shell 421 and the lower shell 422 to process the upper shell 421 and the lower shell 422;

[0047] c. After performing hole machining and groove machining on the inner core layer 41, apply glue and then install it onto the lower housing 422;

[0048] d. Apply glue on the corresponding mating surfaces of the lower housing 422 and the upper housing 421, and then cover the upper housing 421 onto the lower housing 422;

[0049] e. Stick a moisture-proof covering layer 43 on the outer surfaces of the upper housing 421 and the lower housing 422;

[0050] f. Also stick an anti-static covering layer 44 on the outer surface of the upper housing 421;

[0051] g. Spray a connecting spray coating 45 along the sides of the upper housing 421 and the lower housing 422.

Claims

1. A ceiling fan, characterized in that, Comprising: A housing (1), a motor (2) is installed inside the housing (1), at least three connecting members (3) are connected to the motor (2), and a ceiling fan blade (4) is detachably connected to each connecting member (3). The ceiling fan blade (4) includes a core layer (41) made of carbon fiber material, a blade body layer (42) made of model pulp material is connected to the outside of the core layer (41), moisture-proof coating layers (43) are provided at both the upper and lower ends of the blade body layer (42), and an anti-static coating layer (44) is further provided on the upper side of the blade body layer (42). The blade body layer (42) is an accumulative wing-shaped blade, and the blade body layer (42) includes an upper housing (421) and a lower housing (422) that are snap-connected to each other. Both the upper housing (421) and the lower housing (422) are hollow structures, and honeycomb structures (401) are provided in the hollow parts of the upper housing (421) and the lower housing (422). A gap is formed between the connection surfaces of the upper housing (421) and the lower housing (422), a sealant coating (423) is provided between the gaps, and a connection spray coating (45) is sprayed along the circumferences of the upper housing (421) and the lower housing (422). The lower housing (422) includes a lower connecting plate (4221), a protruding connection protrusion (4222) is provided on the lower connecting plate (4221), and a plurality of protruding ribs (4223) are further provided on the lower connecting plate (4221). The upper housing (421) includes an upper connecting plate (4211), a protruding portion (4212) is provided on the upper connecting plate (4211), and a fixing card slot (4213) capable of being snap-connected to the ribs (4223) is provided on the protruding portion (4212). The connection protrusion (4222) and the protruding portion (4212) form the gap when the lower housing (422) and the upper connecting plate (4211) are snap-connected to each other. Both the upper housing (421) and the lower housing (422) include a flat fixing portion (51), a blade portion (52) is connected to the end edge of the fixing portion (51), and a transition portion (53) capable of making the blade portion (52) inclined with respect to the horizontal plane is provided between the fixing portion (51) and the blade portion (52). The head to the end of the transition portion (53) is twisted, so that one side of the blade portion (52) protrudes upward and the other side protrudes downward, so that the blade portion (52) is inclined in the forward direction of rotation. The transition portion (53) makes the inclination angle (α) between the blade portion (52) and the water surface range from 15° to 30°. A protrusion (4214) is provided on the upper surface of the upper housing (421) near the tail, one side of the protrusion (4214) is arc-shaped, and one side of the protrusion (4214) is vertical.

2. The ceiling fan according to claim 1, wherein: The described connecting member (3) is a connecting piece, and one end of the connecting piece is fixed to the motor (2), and a quick installation structure (6) capable of connecting the other end of the connecting piece and the ceiling fan blade (4) is provided therebetween.

3. The ceiling fan according to claim 2, characterized in that: A plurality of connecting holes (31) are provided on the connecting member (3), mounting holes (402) corresponding to the positions of the plurality of connecting holes (31) are provided on the ceiling fan blade (4), and the quick installation structure (6) includes a connecting column (61) capable of passing through the connecting member (3) and the ceiling fan blade (4) simultaneously, and a locking member (62) connected to the connecting column (61) and capable of simultaneously abutting against the surfaces of the connecting column (61) and the ceiling fan blade (4) when engaged with the connecting column (61) to fix the ceiling fan blade (4) and the connecting member (3).

4. The ceiling fan according to claim 3, wherein: A rubber ring (403) is installed in the mounting hole (402), a channel (4031) for the connecting column (61) to pass through is provided in the middle of the rubber ring (403), convex rings (4032) are provided at both ends of the rubber ring (403), and a biting card slot (4033) capable of adhering to the upper and lower surfaces of the ceiling fan blade (4) and biting the ceiling fan blade (4) is provided between the two convex rings (4032). The locking member (62) is a locking piece arranged in a ring shape, an opening card slot (621) for the connecting column (61) to be inserted into is provided on the locking piece, extension parts (622) extending outwards are provided at both ends of the locking piece and located at the opening card slot (621), through holes (6221) for a quick installation tool to be inserted into are provided on the extension parts (622), and when the quick installation tool is inserted into the through holes (6221) and a force is applied, the opening of the opening card slot (621) can be enlarged for the connecting column (61) to be inserted into. The head of the connecting column (61) is in an umbrella shape, and a locking slot (611) for the locking member (62) to be inserted into is further provided on the connecting column (61). The diameter of the connecting column (61) at the position of the locking slot (611) is smaller than other parts, and when the locking piece is inserted into the locking slot (611), the upper end and the lower end of the locking piece respectively abut against the inner wall surfaces of the rubber ring (403) and the connecting column (61) to lock the connecting member (3) and the ceiling fan blade (4).

5. A manufacturing method of a ceiling fan blade, characterized in that Using the ceiling fan according to any one of claims 1 - 4, comprising the following steps: a. Cutting the carbon fiber sheet along the contour of the ceiling fan blade to obtain an inner core layer (41); b. Separately introducing the model pulp into the molds corresponding to the upper housing (421) and the lower housing (422) to process the upper housing (421) and the lower housing (422); c. Performing hole processing and groove processing on the inner core layer (41), brushing glue thereon, and then installing it on the lower housing (422); d. Brushing glue on the corresponding fitting surfaces of the lower housing (422) and the upper housing (421), and then covering the upper housing (421) on the lower housing (422); e. Attaching a moisture-proof covering layer (43) to the outer surfaces of the upper housing (421) and the lower housing (422); f. An anti-static covering layer (44) is also pasted on the outer surface of the upper housing (421); g. A connecting spray coating layer (45) is sprayed along the sides of the upper housing (421) and the lower housing (422).

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