CN207380435U - A kind of denoising structure of elevator projecting apparatus - Google Patents

Abstract

The utility model discloses a kind of denoising structures of elevator projecting apparatus,Its structure includes projecting apparatus protective shell,Upper cover,Water cooling noise reducing mechanism,Fixed frame,Host chip plate,Upper cover is fixed by snap in projecting apparatus protective shell side,And and on the inside of upper cover,Fixed frame is with being in integrated formed structure inside projecting apparatus protective shell,Fixed frame is connected to projecting apparatus protective shell lower inside,Water cooling noise reducing mechanism is tightly fastened inside projecting apparatus protective shell by fixed frame by the cooperation of nut and buckle,Water cooling noise reducing mechanism is arranged on host chip plate side,Host chip board is inside projecting apparatus protective shell,Water cooling noise reducing mechanism is equipped with cold pipe racking device,Air exhausting device,Fixing sleeve,Cooling connecting tube,Absorb heat box device,The utility model realizes the radiating mode in elevator projecting apparatus based on water cooling denoising structure,Radiator is more excellent with efficiency,Easily install,The advantages that firm structure,Greatly reduce the generation of noise,It is more mute during use.

Description

A kind of denoising structure of elevator projecting apparatus

Technical field

The utility model is a kind of denoising structure of elevator projecting apparatus, belongs to denoising structure field.

Background technology

Under the background that projecting apparatus pulls the policy of domestic demand and people's income constantly to be promoted in country, Rural Culture ethnic minority regions Implementation further promoted the rapid growth of China's Projector Market.According to statistics, China's Projector Market shipment amount in 2010 Scale reaches 1,280,000, increases by 43.6% compared to 2009.Think, China's Projector Market in 2011 will keep fast Speed increases, and annual shipment amount is up to 1,670,000, year rate of growth about projecting apparatus be 30%.The five-year, China's Projector Market Compound growth rate be up to 17.1%.

Chinese projector's product consumption market is concentrated mainly on the large and medium-sized cities such as the more flourishing North China of economy, East China, south China City.Education, commercial affairs, government, home entertaining are the four big main consumer groups for supporting Chinese projector industry.Make a general survey of Chinese projection Machine market.Either in terms of the quantity, quality or kind of product, certain maturity, the popularization of product are all reached Using psychological positioning of the projector in user is made to change from more professional display device to mass product, the marketing scale of industry Constantly expand, 2010, China's Projector Market sales volume is 1,100,000, increases by 37.5% compared to 2009.From this 10 years From the point of view of projector of state market development situation, China's Projector Market scale increases by 18 times, and average growth rate per annum 39.14% is gone Industry is in high-speed development period, but in elevator projecting apparatus, the mode that the radiator used mostly is arranged for wind, this radiator For main noise source in projecting apparatus, it is bigger that rotation speed of the fan may result in noise sooner, influences to use.

Utility model content

In view of the deficienciess of the prior art, the utility model aim is to provide a kind of denoising structure of elevator projecting apparatus, To solve the problem of to reduce the generation of noise in a manner that water cooling noise reducing mechanism replaces wind row.

To achieve these goals, the utility model is to realize by the following technical solutions：A kind of elevator projecting apparatus Denoising structure, structure include projecting apparatus protective shell, upper cover, water cooling noise reducing mechanism, fixed frame, host chip plate, it is described on Cover it is fixed by snap in projecting apparatus protective shell side, and and on the inside of the upper cover, the fixed frame in projecting apparatus protective shell Portion is in integrated formed structure, and the fixed frame is connected to projecting apparatus protective shell lower inside, and the fixed frame passes through nut and card Water cooling noise reducing mechanism is tightly fastened inside projecting apparatus protective shell by the cooperation of button, and the water cooling noise reducing mechanism is arranged on host chip Plate side, for the host chip board inside projecting apparatus protective shell, the water cooling noise reducing mechanism is equipped with cold pipe racking device, air draft Device, fixing sleeve, cooling connecting tube, heat absorption box device, described cooling connecting tube one end is screwed by screwed connecting hole In on fixing sleeve, the cooling connecting tube other end is embedded on heat absorption box device, the air exhausting device outer surface and cold comb Outside of deivce face is in integrated formed structure, and the air exhausting device is closely connected with cold pipe racking device, and the heat absorption box device is circle Shape structure, the water-cooling head are fixed on by 4 groups of nuts on host chip plate, and pass through electricity mutual cooperation connection, the cold row Pipe device is equipped with cold row's main body, cold comb, fixed strip button, and the cold comb is fixed on by fixed strip button in cold row's main body, institute Fixed strip button is stated equipped with 2 groups, the fixed strip button is respectively arranged on cold row's main body both side surface, and is connected by nut tightening, institute State air exhausting device equipped with flabellum fixinig plate, it is fixed fasten, standing screw, central shaft, exhaust flabellum, the flabellum fixinig plate passes through solid Surely fasten and link together with cold row's main body, the standing screw surface is equipped with screw thread, and the standing screw is tightened in fixed fasten Portion, the central shaft are arranged on middle inside flabellum fixinig plate, and the central shaft is internally provided with spool, leads to inside the central shaft Wire-passing tube is connected with cold row's main body, and the central shaft is equipped with the protection shell of protection shell, the exhaust flabellum and central shaft In integrated formed structure, the exhaust flabellum is equipped with 6, and the exhaust flabellum uniformly equidistantly radially distributes in protection shell Side edge surface on, it is described heat absorption box device be equipped with upper protection cap, fine copper wire drawing panel, attaching nut, fixing buckle, second protection Lid, the fine copper wire drawing panel are fixed on by built-in buckle inside upper protection cap, and the attaching nut is equipped with multiple, the company The uniform equidistant arrangement of connected nut is in upper protection cap, and the fixing buckle is with upper protection cap in integrated formed structure, the fixing buckle In connection in protection cap side edge surface, second protection cap is closely snapped together by being buckled with upper protection cap.

Further, the central shaft is equipped with protection dome, and the protection dome is internally provided with fixing buckle, and protection dome leads to It crosses fixing buckle mutually closely to fasten with central shaft, inside protection central shaft, dust is avoided to enter, reduce loss reduction and make an uproar Sound.

Further, the fixing sleeve is equipped with connection annulus, and described connection annulus one end is inserted into inside fixing sleeve, described It is interference fit that annulus, which is connected, with fixing sleeve, and the connection annulus is internally threaded, the connection annulus and cooling connecting tube Screw connection, cooling connecting tube is connected by connecting annulus with fixing sleeve even closer, avoids coming off, prevents water outflow damage from setting It is standby.

Further, the fixation is fastened equipped with 4, and the flabellum fixinig plate is rectangular configuration, and the fixation is fastened arranged on fan Leaf fixinig plate surrounding apex angle is fixed more firm.

Further, the heat absorption box device is additionally provided with rotatable gland, and the rotatable gland is internally provided with spiral shell Line, the cooling connecting tube are screwed with rotatable gland by screw thread and are connected, and are realized the connection angle of cooling connecting tube and can be revolved Modulation section avoids distortion impaired.

Further, the fixing sleeve is connected to cold pipe racking device upper and lower ends by the riveted that is buckled, and is filled with cold comb It puts and is internally provided with pipeline connection, the fixing sleeve plays the role of firm cold row's main body while cooling connecting tube is connected, subtracts Few vibration reduces noise.

Further, second protection cap is internally provided with compact electronic part, detachable cover, and the detachable cover passes through card It is buckled on the second protection cap surface, the precise electronic part is embedded in inside the second protection cap, the precise electronic part and second Protection cap connects for interference fit.

Advantageous effect

The utility model realizes the radiating mode in elevator projecting apparatus based on water cooling denoising structure, and radiator has effect Can be more excellent, it easily installs, the advantages that firm structure, greatly reduces the generation of noise, when use is more mute.

Description of the drawings

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model Sign, objects and advantages will become more apparent upon：

Fig. 1 is a kind of structure diagram of the denoising structure of elevator projecting apparatus of the utility model.

Fig. 2 is the mounting structure schematic diagram of the utility model water cooling noise reducing mechanism.

Fig. 3 is the structure diagram of the cold pipe racking device of the utility model.

Fig. 4 is the structure diagram of the utility model air exhausting device.

Fig. 5 is the structure diagram of the utility model heat absorption box device.

Fig. 6 is the structure diagram of the utility model heat absorption box device installation.

In figure：Projecting apparatus protective shell -1, upper cover -2, water cooling noise reducing mechanism -3, fixed frame -4, host chip plate -5, cold row Pipe device -30, air exhausting device -31, fixing sleeve -32, cooling connecting tube -33, heat absorption box device -34, cold row's main body -300, cold row - 311, standing screw -312, central shaft -313, exhaust fan are fastened in pipe -301, fixed strip button -302, flabellum fixinig plate -310, fixation Leaf -314, upper protection cap -340, fine copper wire drawing panel -341, attaching nut -342, fixing buckle -343, the second protection cap -344, Protect dome -315, connection annulus -320, rotatable gland -345, precise electronic part -3440, detachable cover -3441.

Specific embodiment

Technical means, creative features, achievable purpose and effectiveness to realize the utility model are easy to understand, below With reference to specific embodiment, the utility model is expanded on further.

- Fig. 6 is please referred to Fig.1, the utility model provides a kind of technical solution of the denoising structure of elevator projecting apparatus：Its structure Including projecting apparatus protective shell 1, upper cover 2, water cooling noise reducing mechanism 3, fixed frame 4, host chip plate 5, the upper cover 2 is solid by being buckled Due to 1 side of projecting apparatus protective shell, and and arranged on 2 inside of upper cover, the fixed frame 4 is with 1 inside of projecting apparatus protective shell in one Molding structure, the fixed frame 4 are connected to 1 lower inside of projecting apparatus protective shell, and the fixed frame 4 is matched somebody with somebody by nut with what is be buckled Water cooling noise reducing mechanism 3 is tightly fastened inside projecting apparatus protective shell 1 by conjunction, and the water cooling noise reducing mechanism 3 is arranged on host chip plate 5 Side, the host chip plate 5 are stuck in inside projecting apparatus protective shell 1, the water cooling noise reducing mechanism 3 be equipped with cold pipe racking device 30, Air exhausting device 31, fixing sleeve 32, cooling connecting tube 33, heat absorption box device 34, described 33 one end of cooling connecting tube is by carrying spiral shell The connecting hole of line is tightened on fixing sleeve 32, and 33 other end of cooling connecting tube is embedded on heat absorption box device 34, the row 31 outer surface of wind apparatus is with cold 30 outer surface of pipe racking device in integrated formed structure, the air exhausting device 31 and cold pipe racking device 30 Close connection, the heat absorption box device 34 is circular configuration, and the water-cooling head 35 is fixed on host chip plate 5 by 4 groups of nuts On, and passing through electricity mutual cooperation connection, the cold pipe racking device 30 is equipped with cold row's main body 300, cold comb 301, fixed strip button 302, the cold comb 301 is fixed on by fixed strip button 302 in cold row's main body 300, and the fixed strip button 302 is equipped with 2 groups, institute It states fixed strip button 302 and is respectively arranged on cold 300 both side surface of row's main body, and connected by nut tightening, the air exhausting device 31 is set There is flabellum fixinig plate 310, fix and fasten 311, standing screw 312, central shaft 313, exhaust flabellum 314, the flabellum fixinig plate 310 311 are fastened by fixation to link together with cold row's main body 300,312 surface of standing screw is equipped with screw thread, the standing screw 312, which are tightened in fixation, fastens inside 311, and the central shaft 313 is arranged on 310 inside middle of flabellum fixinig plate, the central shaft 313 Spool is internally provided with, is connected inside the central shaft 313 by spool with cold row's main body 300, the central shaft 313, which is equipped with, to be protected Shell is protected, described to be vented flabellum 314 with the protection shell of central shaft 313 in integrated formed structure, the exhaust flabellum 314 is equipped with 6, it is described exhaust flabellum 314 uniformly equidistantly radially distribute in protection shell side edge surface on, the heat absorption box device 34 are equipped with upper protection cap 340, fine copper wire drawing panel 341, attaching nut 342, fixing buckle 343, the second protection cap 344, described pure Copper wire drawing panel 341 is fixed on by built-in buckle inside upper protection cap 340, and the attaching nut 342 is equipped with multiple, the company 342 uniform equidistant arrangement of connected nut in upper protection cap 340, with upper protection cap 340 in integrated molding tie by the fixing buckle 343 Structure, above in 340 side edge surface of protection cap, second protection cap 344 passes through buckle and upper protection cap for the connection of fixing buckle 343 340 closely snap together, and the central shaft is equipped with protection dome 315, and the protection dome 315 is internally provided with fixing buckle, protects Guard circle lid 315 is mutually closely fastened by fixing buckle with central shaft, and the fixing sleeve 32 is equipped with connection annulus 320, the company It connects inside 320 one end of annulus insertion fixing sleeve 32, the connection annulus 320 is interference fit with fixing sleeve 32, the connection circle Ring 320 is internally threaded, and the connection annulus 320 is screwed with cooling connecting tube 33 to be connected, and the fixation fastens 311 and is equipped with 4, The flabellum fixinig plate 310 is rectangular configuration, and the fixation fastens 311 and is arranged on 310 surrounding apex angle of flabellum fixinig plate, the endothermic box Device 34 is additionally provided with rotatable gland 345, and the rotatable gland 345 is internally threaded, the cooling connecting tube 33 It is screwed and is connected with rotatable gland 345 by screw thread, the fixing sleeve 32 is connected to cold pipe racking device 30 by the riveted that is buckled Upper and lower ends, and be internally provided with pipeline with cold pipe racking device 30 and be connected, second protection cap 344 is internally provided with precise electronic part 3440th, detachable cover 3441, the detachable cover 3441 are arranged on by buckle on 344 surface of the second protection cap, the accurate electricity Component 3440 is embedded in inside the second protection cap 344, and 3440 and second protection cap 344 of precise electronic part connects for interference fit It connects.

Water cooling noise reducing mechanism described in this patent refers to that a kind of cold cooling system makes the coolant in heat-dissipating pipe using pump It cycles and radiates, heat absorbing part on a heat sink is referred to as endothermic box in liquid cooling system, for from computer CPU, north Upper on the chip boards such as bridge, video card to absorb heat, the heat that heat absorbing part absorbs is discharged to by the radiator designed at the fuselage back side Outside host, the generation of effective noise reduction function, use is more mute, substantially the vicious circle departing from high noisy violence heat dissipation.

There are two the characteristics of water cooling noise reducing mechanism are maximum：Heat and the low noise work of equalization processor.Due to the ratio of water Thermal capacitance super large, therefore substantial amounts of heat can be absorbed and temperature is kept significantly not change, the temperature energy of host in projecting apparatus The control accessed, the operation of burst will not all cause host internal temperature moment significantly to change, due to heat exchanger Surface area is very big, so the fan of the slow-speed of revolution is only needed to be radiated to it with regard to that can play good effect, therefore water cooling noise reduction Mechanism arranges in pairs or groups the relatively low fan of rotating speed mostly, in addition, the work noise of water pump generally will not be it is obvious that so whole heat dissipation System is just very quiet compared with air cooling system.

First check for whether each several part is stably connected with when being used, confirm equipment components it is complete, well-tended appearance it Afterwards, equipment is placed on suitable operating position, connects power supply, press power knob, adjusted running parameter, can start afterwards Normal work water cooling noise reducing mechanism to reach in a manner that water cooling noise reducing mechanism replaces wind row, reduces the generation of noise Purpose, in practical elevator projecting apparatus, realize the radiating mode in elevator projecting apparatus based on water cooling denoising structure, water cooling Heat using circulation fluid is transported to from water-cooled block on heat exchanger and distributed again by denoising structure, instead of the equal of wind-cooling heat dissipating The advantages that matter metal or heat pipe, radiator have efficiency more excellent, easily install, firm structure, greatly reduces and makes an uproar The generation of sound, when use, are more mute.

The utility model solves the problems, such as it is that denoising structure cannot possess in a manner that water cooling noise reducing mechanism replaces wind row, The function of the generation of noise, the mode that the radiator used mostly is arranged for wind are reduced, this radiator is main in projecting apparatus The noise source wanted, it is bigger that rotation speed of the fan may result in noise sooner, influences to use, the utility model passes through above-mentioned component It being combined with each other, realizes the radiating mode in elevator projecting apparatus based on water cooling denoising structure, radiator is more excellent with efficiency, It easily installs, the advantages that firm structure, greatly reduces the generation of noise, when use is more mute, described in detail below:

The water cooling noise reducing mechanism 3 is equipped with cold pipe racking device 30, air exhausting device 31, fixing sleeve 32, cooling connecting tube 33, suction Hot box device 34, described 33 one end of cooling connecting tube are tightened in by screwed connecting hole on fixing sleeve 32, the cooling 33 other end of connecting tube is embedded on heat absorption box device 34, and 31 outer surface of air exhausting device is in cold 30 outer surface of pipe racking device Integrated formed structure, the air exhausting device 31 are closely connected with cold pipe racking device 30, and the heat absorption box device 34 is circular configuration, The water-cooling head 35 is fixed on by 4 groups of nuts on host chip plate 5, and passes through electricity mutual cooperation connection, the cold comb dress It puts 30 and is equipped with cold row's main body 300, cold comb 301, fixed strip button 302, the cold comb 301 is fixed on by fixed strip button 302 In cold row's main body 300, the fixed strip button 302 is equipped with 2 groups, and the fixed strip button 302 is respectively arranged on cold 300 both sides table of row's main body Face, and connected by nut tightening, the air exhausting device 31 is equipped with flabellum fixinig plate 310,311, standing screw 312 is fastened in fixation, Central shaft 313, exhaust flabellum 314, the flabellum fixinig plate 310 fasten 311 by fixation and link together with cold row's main body 300, 312 surface of standing screw is equipped with screw thread, and the standing screw 312 is tightened in fixation and fastens inside 311, the central shaft 313 Arranged on 310 inside middle of flabellum fixinig plate, the central shaft 313 is internally provided with spool, passes through line inside the central shaft 313 Guan Yuleng row's main bodys 300 are connected, and the central shaft 313 is equipped with protection shell, the exhaust flabellum 314 and central shaft 313 Protecting shell, the exhaust flabellum 314 is equipped with 6, and the exhaust flabellum 314 is uniformly equidistant radial in integrated formed structure It is distributed in the side edge surface of protection shell, the heat absorption box device 34 is equipped with upper protection cap 340, fine copper wire drawing panel 341, connects Connected nut 342, fixing buckle 343, the second protection cap 344, the fine copper wire drawing panel 341 are fixed on upper protection by built-in buckle Inside lid 340, the attaching nut 342 be equipped with it is multiple, the 342 uniform equidistant arrangement of attaching nut in upper protection cap 340, The fixing buckle 343 is with upper protection cap 340 in integrated formed structure, the connection of fixing buckle 343 340 side edge surface of upper protection cap On, second protection cap 344 is closely snapped together by being buckled with upper protection cap 340.

The basic principle of the utility model and main feature and the advantages of the utility model has been shown and described above, for For those skilled in the art, it is clear that the utility model is not limited to the details of above-mentioned exemplary embodiment, and without departing substantially from this In the case of the spirit or essential attributes of utility model, the utility model can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by institute Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent requirements of the claims All changes are embraced therein.Any reference numeral in claim should not be considered as to the involved right of limitation It is required that.

Moreover, it will be appreciated that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should Using specification as an entirety, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (7)

1. a kind of denoising structure of elevator projecting apparatus, structure includes projecting apparatus protective shell (1), upper cover (2), water cooling noise reducing mechanism (3), fixed frame (4), host chip plate (5), the upper cover (2) is fixed by snap in projecting apparatus protective shell (1) side, and and On the inside of upper cover (2), the fixed frame (4) is internal in integrated formed structure, the fixed frame with projecting apparatus protective shell (1) (4) it is connected to projecting apparatus protective shell (1) lower inside, the fixed frame (4) is by the cooperation of nut and buckle by water cooling noise reduction Mechanism (3) is tightly fastened in projecting apparatus protective shell (1) inside, and the water cooling noise reducing mechanism (3) is arranged on host chip plate (5) side Side, it is internal that the host chip plate (5) is stuck in projecting apparatus protective shell (1), it is characterised in that：

The water cooling noise reducing mechanism (3) is equipped with cold pipe racking device (30), air exhausting device (31), fixing sleeve (32), cooling connecting tube (33), absorb heat box device (34), and described cooling connecting tube (33) one end is tightened in fixing sleeve by screwed connecting hole (32) on, cooling connecting tube (33) other end is embedded on heat absorption box device (34), air exhausting device (31) outer surface With cold pipe racking device (30) outer surface in integrated formed structure, the air exhausting device (31) closely connects with cold pipe racking device (30) It connecing, the heat absorption box device (34) is circular configuration, and water-cooling head (35) is fixed on by 4 groups of nuts on host chip plate (5), and It is cooperated and connected by electricity；

The cold pipe racking device (30) is equipped with cold row's main body (300), cold comb (301), fixed strip button (302), the cold comb (301) it is fixed on by fixed strip button (302) on cold row's main body (300), the fixed strip button (302) is equipped with 2 groups, the fixation Item button (302) is respectively arranged on cold row's main body (300) both side surface, and is connected by nut tightening；

The air exhausting device (31) is equipped with flabellum fixinig plate (310), (311), standing screw (312), central shaft are fastened in fixation (313), flabellum (314) is vented, the flabellum fixinig plate (310) is connected to one by fixed fasten (311) with cold row's main body (300) It rises, standing screw (312) surface is equipped with screw thread, and the standing screw (312), which is tightened in fix, fastens (311) inside, described Central shaft (313) is arranged on the internal middle of flabellum fixinig plate (310), and the central shaft (313) is internally provided with spool, the center It is connected inside axis (313) by spool with cold row's main body (300), the central shaft (313) is equipped with protection shell, the exhaust The protection shell of flabellum (314) and central shaft (313) is in integrated formed structure, and the exhaust flabellum (314) is described equipped with 6 Exhaust flabellum (314) uniformly equidistantly radially distributes in the side edge surface of protection shell；

The heat absorption box device (34) is equipped with upper protection cap (340), fine copper wire drawing panel (341), attaching nut (342), fixation (343), the second protection cap (344) are detained, the fine copper wire drawing panel (341) is fixed on upper protection cap (340) by built-in buckle Inside, the attaching nut (342) be equipped with it is multiple, the attaching nut (342) uniformly equidistant arrangement in upper protection cap (340) On, the fixing buckle (343) and upper protection cap (340) are in integrated formed structure, protection cap in fixing buckle (343) connection (340) in side edge surface, second protection cap (344) is closely snapped together by being buckled with upper protection cap (340).

2. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：Central shaft, which is equipped with protection, to be justified It covers (315), the protection dome (315) is internally provided with fixing buckle, and protection dome (315) is mutually tight with central shaft by fixing buckle Close fastening.

3. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：On the fixing sleeve (32) Equipped with connection annulus (320), connection annulus (320) one end insertion fixing sleeve (32) is internal, the connection annulus (320) with Fixing sleeve (32) is interference fit, and the connection annulus (320) is internally threaded, and the connection annulus (320) connects with cooling It takes over (33) and screws connection.

4. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：The fixation is fastened (311) Equipped with 4, the flabellum fixinig plate (310) is rectangular configuration, and the fixation fastens (311) arranged on flabellum fixinig plate (310) surrounding Apex angle.

5. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：The heat absorption box device (34) rotatable gland (345) is additionally provided with, the rotatable gland (345) is internally threaded, the cooling connecting tube (33) screwed and be connected with rotatable gland (345) by screw thread.

6. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：The fixing sleeve (32) is logical It crosses buckle riveted and is connected to cold pipe racking device (30) upper and lower ends, and be internally provided with pipeline with cold pipe racking device (30) and be connected.

7. a kind of denoising structure of elevator projecting apparatus according to claim 1, it is characterised in that：Second protection cap (344) precise electronic part (3440), detachable cover (3441) are internally provided with, the detachable cover (3441) is arranged on the by buckle On two protection caps (344) surface, embedded second protection cap (344) of the precise electronic part (3440) is internal, the precise electronic Part (3440) is connected with the second protection cap (344) for interference fit.