CN110418534A - A kind of vehicular communication equipment cabinet facilitating debugging - Google Patents

Abstract

The present invention relates to a kind of vehicular communication equipment cabinets for facilitating debugging, including cabinet, the cabinet includes shell and the front shroud that is rotatably arranged at shell aperture, the front shroud bottom is equipped with first rotating shaft, the first rotating shaft slides setting inside the shell in the horizontal direction, and the outer casing bottom is equipped with the holding tank that part slides into when turning to horizontal position for front shroud.When wanting to safeguard communication equipment, open front shroud, front shroud part is slid into holding tank, at this time under the limitation of holding tank, front shroud can not be rotated, and the part that front shroud leaks out shell can serve as the support of keyboard, keyboard is directly placed into the part that front shroud exposes shell, front shroud can not only serve as cabinet a part in this way, but also the support of keyboard may be implemented, convenient that the intracorporal communication apparatus of case is safeguarded and debugged.

Description

A kind of vehicular communication equipment cabinet facilitating debugging

Technical field

The present invention relates to a kind of communication apparatus, more particularly, to a kind of vehicular communication equipment cabinet for facilitating debugging.

Background technique

Vehicle-mounted reinforcement type case for communication equipment usually uses under the conditions of emergency environmental, therefore generallys use before cabinet Implement the operation such as plug-in card, maintenance on plate, whether the operation of front panel opened or closed is convenient and efficient, to the emergency of communication equipment Operation and maintenance is most important.

Notification number provides a kind of vehicle-carrying communication suitable for emergency environmental condition for the patent of invention of CN103179829B Equipment cabinets, including outline border, liner, front panel, rear panel, earthing rod, handle and cabling channel；The outline border is by up and down four Block metal decking surrounds the overall structure being welded, and liner is located at the inside of outline border, is linked together with outline border；It is set on front panel There are electrical connector hole location, signal lamp hole location and power switch hole location；The rear end face of rear panel and outline border is spirally connected, rear panel Lateral surface is equipped with earthing rod；Outline border front end face is respectively arranged on the left side and the right side handle；Cabling channel is equipped between liner and outline border； Emergency mobile component is equipped between the front panel and machine frame front end face, the emergency mobile component is by Damping rotation shaft and self-locking dress Set composition；The present invention has significant emergency mobile performance, and simple and reliable for structure, is suitable for various vehicular communication equipments.

In the actual operation process, it when wanting to debug communication apparatus, needs to open front panel, it will be external Keyboard is connect with the communication apparatus in cabinet, thus realize the debugging or maintenance of communication apparatus, but vehicle mounted communication equipment machine The using area of case is to be located at car mostly, and vehicle operation narrow space, external connection keyboard is difficult to find local placement, is wanted in this way With regard to inconvenient when using external connection keyboard in the car.

Summary of the invention

The object of the present invention is to provide a kind of vehicular communication equipment cabinets for facilitating debugging, can be convenient placement external connection keyboard Communication apparatus is safeguarded and debugged to convenient.

Foregoing invention purpose of the invention, which has the technical scheme that, a kind of facilitates the vehicle-mounted logical of debugging Believe equipment cabinets, including cabinet, the cabinet include shell and be rotatably arranged on shell opening front shroud, before described Cover board bottom is equipped with first rotating shaft, and the first rotating shaft slides setting inside the shell in the horizontal direction, and the outer casing bottom is equipped with The holding tank that part slides into when turning to horizontal position for front shroud.

By using above-mentioned technical proposal, when wanting to safeguard communication equipment, front shroud is opened, by front cover Plate part slides into holding tank, and at this time under the limitation of holding tank, front shroud can not be rotated, and the part that front shroud leaks out shell can To serve as the support of keyboard, keyboard is directly placed into the part of front shroud exposing, such front shroud can both serve as case Body a part, and the support of keyboard may be implemented, it is convenient that the intracorporal communication apparatus of case is safeguarded and debugged.

The present invention is further arranged to: sliding block is arranged with outside the first rotating shaft, the holding tank two sides are equipped with for sliding block The sliding slot of sliding, outer holding tank is stretched out in the sliding slot end and extension length and length cooperate.

By using above-mentioned technical proposal, by setting sliding block and sliding slot, first rotating shaft and shell both may be implemented Rotation connection, while the sliding of first rotating shaft inside the shell also may be implemented, structure is simple, reliable operation.

The present invention is further arranged to: the axial sliding in the first rotating shaft along first rotating shaft is equipped with locating rod, described First rotating shaft is stretched out in locating rod one end, is equipped in the sliding slot when front shroud part slides into holding tank for locating rod insertion Location hole, the interior driving spring for being equipped with driving locating rod and being slid towards sliding slot of the first rotating shaft.

By using above-mentioned technical proposal, after front shroud, which slides into part arrival, needs length, locating rod insertion positioning The driving spring that driving locating rod slides towards sliding slot is equipped in hole, in first rotating shaft, driving spring can be such that locating rod keeps In positioning hole, locating rod is set, after front shroud sliding in place, locating rod is inserted into positioning hole, and front shroud can be realized Fixation in holding tank, the support of more stable realization keyboard.

The present invention is further arranged to: being located at front shroud two sides on the front shroud medial surface and is symmetrically arranged with for pressing key The pressing piece of plate edge, the pressing piece and front shroud are rotatablely connected and the vertical front shroud of rotational plane, sets on the front shroud The elastic component for thering is driving pressing piece to slide towards front shroud.

The fixation of keyboard and front shroud, Ke Yiyou can be realized by the way that pressing piece is arranged by using above-mentioned technical proposal Effect is avoided when vehicle jolts, and keyboard is fallen down from front shroud, is liberated the both hands of operator, be can be convenient in maintenance The operation such as wiring is carried out simultaneously.

The present invention is further arranged to: the pressing piece includes U-shaped bar and the loop bar for being set in U-shaped bar both ends, described Loop bar is equipped with the second shaft being rotatablely connected with front shroud far from one end of U-shaped bar, and the elastic component includes being set in second turn Torsional spring on axis, the one end of torsional spring are fixed with front shroud, and the other end is fixed with the second shaft.

The contact surface with keyboard can be reduced to the greatest extent by pressing piece whole installation at U-shaped by using above-mentioned technical proposal Product avoids influencing keyboard work, U-shaped bar and loop bar is arranged, the adjusting of U-shaped bar position may be implemented, it is long to adapt to different size The fixation of the keyboard of degree uses tight fit, can fall off from loop bar to avoid U-shaped bar between U-shaped bar and loop bar, when by U-shaped bar After drawing appropriate length, under the driving of torsional spring, the middle part of U-shaped bar can be abutted with keyboard edge, and keyboard pressing is fixed On front shroud, the fixation of keyboard is realized.

The present invention is further arranged to: several along being equipped with perpendicular to loop bar length direction on the middle part bottom surface of the U-shaped bar Briquetting, briquetting planar slip where perpendicular to U-shaped bar are arranged on U-shaped bar, and the U-shaped bar is equipped with driving briquetting court The pressure spring of cover board sliding forward.

By using above-mentioned technical proposal, pressure spring one end is fixed with counterbore bottom surface, and the other end is fixed with briquetting top surface, is passed through Several briquettings are set in the bottom of U-shaped bar, because different briquettings can resist the different location on keyboard top surface, even if keyboard Top be it is inclined, still can keep completely attaching between U-shaped bar and keyboard top surface, to guarantee the fixed effect of keyboard Fruit adapts to the fixation of the keyboard under different conditions.

The present invention is further arranged to: drawstring is wound in second shaft, described drawstring one end and the second shaft are solid Fixed, the other end is protruded into the first rotating shaft of respective side and is fixed with locating rod.

By using above-mentioned technical proposal, the U-shaped bar of two sides is only needed while rotated in this way, and drawstring can be wound to second In shaft, under the transmitting effect of drawstring, locating rod can be pulled, driving locating rod is slided in first rotating shaft, by locating rod It pulls in first rotating shaft, to release fixation of the locating rod to front shroud.

The present invention is further arranged to: the front shroud is equipped with towards the side of shell and can abut with shell end face Sealing ring.

By using above-mentioned technical proposal, when front shroud is in close state, sealing ring is abutted with shell end face, thus It realizes the sealing between front shroud and shell, improves the waterproof performance of cabinet.

The present invention is further arranged to: the liner for installing board and function panel is equipped in the shell, it is described Liner is bonded with outer casing inner wall, and vented cavity is equipped at the top of the liner, is equipped with fan, the bottom of the vented cavity in the vented cavity Face and side, which are run through, is equipped with ventilation hole.

By using above-mentioned technical proposal, when work, after fan is opened, air is inhaled into from vented cavity bottom, from ventilation The two sides of chamber are discharged, and will form circulating current in liner, are accelerated the air circulation in liner, are taken away heat, heat is led to Cross liner to pass, liner be set, not only can be convenient installation board and function panel, but also can to board and Function panel plays second protection, reduces the probability of damage of equipment.

The present invention is further arranged to: the case surface is equipped with several heat dissipation parting beads.

By using above-mentioned technical proposal, the parting bead that radiates can increase the contact area of shell and air, and then improve outer The emission efficiency of heat inside shell improves heat dissipation effect.

In conclusion advantageous effects of the invention are as follows:

1. front shroud not only can be by bin enclosure, while can serve as desktop, keyboard is placed on front shroud, it is convenient to case Intracorporal communication apparatus is safeguarded；

2. the leakproofness of cabinet not only can be improved in enclosed radiation mode, due to being provided with vented cavity and fan, cabinet Heat dissipation performance can also be guaranteed.

Detailed description of the invention

Fig. 1 is overall structure diagram of the invention.

Fig. 2 is cabinet cross-sectional view of the invention.

Fig. 3 is front shroud schematic diagram of internal structure of the invention.

Fig. 4 is top view in Fig. 3.

Fig. 5 is A-A cross-sectional view in Fig. 4.

Fig. 6 is B-B cross-sectional view in Fig. 4.

In figure, 1, cabinet；11, shell；12, front shroud；2, first rotating shaft；21, sliding block；22, locating rod；23, bullet is driven Spring；3, holding tank；31, sliding slot；311, location hole；4, loop bar；41, U-shaped bar；42, the second shaft；421, torsional spring；422, drawstring； 5, counterbore；51, briquetting；52, pressure spring；6, liner；61, vented cavity；62, fan；63, ventilation hole；7, radiate parting bead；8, it seals Circle.

Specific embodiment

Below in conjunction with attached drawing, invention is further described in detail.

Referring to Fig.1, for the invention discloses a kind of vehicular communication equipment cabinet for facilitating debugging, including cabinet 1, communication is set It is standby to be mounted in cabinet 1, front shroud 12 of the cabinet 1 including shell 11 and the opening for being rotatably arranged on shell 11, shell 11 In being wholely set, the structural strength of such shell 11 is high.

Referring to Fig. 2 and Fig. 3, it is equipped with first rotating shaft 2 in 12 bottom of front shroud, first rotating shaft 2 is two and and front shroud 12 are fixedly connected, and two first rotating shafts 2 are symmetricly set on the two sides of the bottom of front shroud 12, and first rotating shaft 2 is slided in the horizontal direction It moves and is arranged in shell 11,11 bottom of shell is equipped with the holding tank 3 that part slides into when turning to horizontal position for front shroud 12, when When wanting to safeguard communication equipment, front shroud 12 is opened, 12 part of front shroud is slid into holding tank 3, is existed at this time Under the limitation of holding tank 3, front shroud 12 can not be rotated, and front shroud 12 may remain in horizontality, and front shroud 12 leaks out at this time The part of shell 11 can serve as the support of keyboard, and keyboard is directly placed into the part that front shroud 12 exposes, in this way before Cover board 12 can not only serve as 1 a part of cabinet, but also the support of keyboard may be implemented, and the convenient communication apparatus in cabinet 1 carries out Maintenance and debugging, the length that front shroud 12 slides into shell 11 is determined according to the weight of front shroud 12, in the present embodiment, front cover Plate 12 protrudes into 1/5th that the length in holding tank 3 is 12 width of front shroud, and front shroud 12 is not easy to drop out and there are abundances Space holding keyboard.

Referring to Fig. 2 and Fig. 3, for the rotation and sliding for realizing first rotating shaft 2 simultaneously, first rotating shaft 2 is arranged with cunning outside Block 21,3 two sides of holding tank are equipped with the sliding slot 31 slid for sliding block 21, and 31 end of sliding slot is stretched out outside holding tank 3 and extension is long Degree cooperates with 21 length of sliding block, and the thickness of sliding block 21 is equal with 12 thickness of front shroud, by setting sliding block 21, both may be implemented the The rotation connection of one shaft 2 and shell 11, while sliding of the first rotating shaft 2 in shell 11 also may be implemented, structure is simple, work Make reliable.

Referring to Fig. 4 and Fig. 6, to avoid in maintenance, front shroud 12 is dropped out out of holding tank 3 after being shaken, In Axial sliding in first rotating shaft 2 along first rotating shaft 2 is equipped with locating rod 22, and locating rod 22 and first rotating shaft 2 are coaxially disposed, positioning First rotating shaft 2 is stretched out in 22 one end of bar, and location hole 311 is equipped in sliding slot 31, and location hole 311 and locating rod 22 cooperate, and works as front shroud After 12 slide-in part arrival need length, locating rod 22 is inserted into location hole 311, equipped with driving locating rod in first rotating shaft 2 22 driving springs 23 slid towards sliding slot 31, driving spring 23 can be such that locating rod 22 is maintained in location hole 311, and setting is fixed Position bar 22, after the sliding in place of front shroud 12, locating rod 22 is inserted into location hole 311, and front shroud 12 can be realized and accommodating Fixation in slot 3, the support of more stable realization keyboard.

Referring to Fig. 4 and Fig. 5, to improve the stability that keyboard is placed on front shroud 12, on 12 medial surface of front shroud It is symmetrically arranged with the pressing piece for pressing keyboard edge positioned at 12 two sides of front shroud, pressing piece and front shroud 12 are rotatablely connected and turn The dynamic vertical front shroud 12 of plane, when work, keyboard is equipped with to drive on front shroud 12 and press positioned at pressing piece and front shroud 12 between The elastic component that casting die slides towards front shroud 12, elastic component drives pressing piece pressing at keyboard edge, by being arranged in keyboard two The fixation of keyboard Yu front shroud 12 can be realized in the pressing piece of side, can effectively avoid when vehicle jolts, and keyboard is from front cover It is fallen down on plate 12, liberates the both hands of operator, can be convenient and carry out the operation such as wiring while maintenance.

Referring to Fig. 4 and Fig. 5, pressing piece includes U-shaped bar 41 and the loop bar 4 for being set in 41 both ends of U-shaped bar, loop bar 4 and U The end of shape bar 41 slides connection, and loop bar 4 is equipped with the second shaft 42, the second shaft 42 and front shroud far from one end of U-shaped bar 41 The rotational plane of 12 rotation connections, loop bar 4 is arranged perpendicular to front shroud 12, and elastic component includes the torsion being set in the second shaft 42 Spring 421,421 one end of torsional spring and front shroud 12 are fixed, the other end and the fixation of the second shaft 42, by pressing piece whole installation at U-shaped, The contact area with keyboard can be reduced to the greatest extent, avoid influencing keyboard work, U-shaped bar 41 and loop bar 4 are set, U may be implemented The adjusting of 41 position of shape bar adapts to the fixation of the keyboard of different size length, and tight fit is used between U-shaped bar 41 and loop bar 4, can It falls off from loop bar 4 to avoid U-shaped bar 41, after drawing U-shaped bar 41 to appropriate length, under the driving of torsional spring 421, U-shaped The middle part of bar 41 can be abutted with keyboard edge, and keyboard pressing is fixed on front shroud 12, realize the fixation of keyboard.

Referring to Fig. 4 and Fig. 5, in order to adapt to the fixation of the keyboard under heeling condition, the edge on the middle part bottom surface of U-shaped bar 41 Several briquettings 51 are equipped with perpendicular to 4 direction of loop bar, sliding is arranged in U-shaped bar 41 at the top of briquetting 51, and briquetting 51 is along perpendicular to U-shaped 41 place planar slip of bar is arranged on U-shaped bar 41, and the bottom surface at 41 middle part of U-shaped bar is equipped with the counterbore 5 slid for briquetting 51, sinks Hole 5 cooperates with briquetting 51 and corresponding briquetting 51 is arranged, and the pressure that driving briquetting 51 is slided towards front shroud 12 is equipped in counterbore 5 Spring 52,52 one end of pressure spring are fixed with 5 bottom surface of counterbore, and the other end is fixed with 51 top surface of briquetting, by being arranged in the bottom of U-shaped bar 41 Several briquettings 51, because different briquettings 51 can resist the different location on keyboard top surface, even if at the top of keyboard being inclination , it is also possible that contacting between U-shaped bar 41 and keyboard top surface well, to guarantee the fixed effect of keyboard, adapt to different shapes The fixation of keyboard under state.

Referring to Fig. 2 and Fig. 3, in addition, the fixation of locating rod 22 is released for convenience, at second turn of close locating rod 22 Axis 42 is wound with drawstring 422, and 422 one end of drawstring and the second shaft 42 are fixed, the other end protrude into the first rotating shaft 2 of respective side with Locating rod 22 is fixed, only needs while rotating the U-shaped bar 41 of two sides in this way, and drawstring 422 is wound, and acts in the transmitting of drawstring 422 Under, locating rod 22 can be pulled, driving locating rod 22 is slided in first rotating shaft 2, locating rod 22 is pulled in first rotating shaft 2, To release fixation of the locating rod 22 to front shroud 12.

Referring to Fig. 6, for convenience of the driving for realizing locating rod 22, it is equipped in first rotating shaft 2 for installing driving spring 23 Accommodating chamber, driving spring 23 be set in locating rod 22 and be located at accommodating chamber in, in locating rod 22 be located at accommodating chamber in be equipped with The baffle abutted with driving spring 23,23 one end of driving spring are abutted with accommodating chamber bottom wall, and the other end is abutted with baffle, drive bullet Spring 23 is in stress always, and driving locating rod 22 is slided towards sliding slot 31, and the other end of locating rod 22 runs through first rotating shaft 2, the end of locating rod 22 is fixed after stretching out first rotating shaft 2 with drawstring 422, facilitates the installation for realizing drawstring 422.

Sealing ring 8 is equipped on front shroud 12 for the leakproofness for improving cabinet 1 referring to Fig. 2 and Fig. 3, sealing ring 8 is viscous It connects and is fixed on the medial surface of front shroud 12, when front shroud 12 is abutted with shell 11, sealing ring 8 is abutted with 11 end face of shell, To realize the sealing between front shroud 12 and shell 11, the waterproof performance of cabinet 1 is improved.

Referring to Fig. 2, communication equipment in order to facilitate the installation of is equipped in shell 11 for installing the interior of board and function panel Gallbladder 6, liner 6 are made of aluminium alloy, and light weight, heat-transfer effect is good, and liner 6 is bonded with 11 inner wall of shell, it is ensured that heat dissipation effect, It is equipped with vented cavity 61 at the top of liner 6, fan 62 is equipped in vented cavity 61, the bottom surface and side of vented cavity 61 are run through equipped with logical Air holes 63, when work, after fan 62 is opened, air is inhaled into from 61 bottom of vented cavity, is discharged from the two sides of vented cavity 61, In It will form circulating current in liner 6, accelerate the air circulation in liner 6, take away heat, heat is passed by liner 6, Liner 6 is set, not only can be convenient installation board and function panel, but also two can be played to board and function panel Secondary protection reduces the probability of damage of equipment.

Referring to Fig.1, to further increase heat dissipation effect, several heat dissipation parting beads 7 are equipped on 11 surface of shell, radiate parting bead 7 The contact area of shell 11 Yu air can be increased, and then improve the emission efficiency of the heat inside shell 11, improve heat dissipation effect Fruit.

The implementation principle of the present embodiment are as follows: when needing to carry out equipment debugging, open front shroud 12, rotate front shroud 12, front shroud 12 is laid flat, 12 part of front shroud is slid into holding tank 3, the locating rod 22 in first rotating shaft 2 is inserted into sliding slot 31 In interior location hole 311, front shroud 12 is fixed on horizontality at this time, the input equipments such as keyboard can be placed on front shroud On 12；

Before holding keyboard, U-shaped bar 41 and loop bar 4 are rotated, keyboard edge will be pressed in the middle part of U-shaped bar 41, driven by torsional spring 421 U-shaped bar 41 rotates down, and keyboard is pressed on front shroud 12, realizes the fixation of keyboard, after debugging finishes, continues up U-shaped bar 41 and loop bar 4 are rotated, the second shaft 42 winds drawstring 422 in the second shaft 42, so that locating rod 22 is pulled, Locating rod 22 is pulled out out of location hole 311, can not only take out keyboard at this time, the locking of locating rod 22 can also be released, it will Front shroud 12 is extracted out out of holding tank 3.

The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it It is interior.

Claims (10)

1. a kind of vehicular communication equipment cabinet for facilitating debugging, including cabinet (1), the cabinet (1) include shell (11) and It is rotatably arranged on the front shroud (12) of shell (11) opening, it is characterised in that: front shroud (12) bottom is equipped with first turn Axis (2), the first rotating shaft (2) slides setting in shell (11) in the horizontal direction, before shell (11) bottom is equipped with confession The holding tank (3) that part slides into when cover board (12) turns to horizontal position.

2. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 1, it is characterised in that: described first turn It is arranged with sliding block (21) outside axis (2), holding tank (3) two sides are equipped with the sliding slot (31) slid for sliding block (21), the sliding slot (31) holding tank (3) are stretched out outside in end and extension length and sliding block (21) length cooperate.

3. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 2, it is characterised in that: described first turn Axial sliding in axis (2) along first rotating shaft (2) is equipped with locating rod (22), and first rotating shaft is stretched out in described locating rod (22) one end (2), it is equipped in the sliding slot (31) when front shroud (12) part slide-in holding tank (3) is interior for the positioning of locating rod (22) insertion Hole (311), the interior driving spring (23) for being equipped with driving locating rod (22) and being slid towards sliding slot (31) of the first rotating shaft (2).

4. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 3, it is characterised in that: the front shroud (12) it is located at front shroud (12) two sides on medial surface and is symmetrically arranged with the pressing piece for pressing keyboard edge, the pressing piece is with before Cover board (12) rotation connection and the vertical front shroud of rotational plane (12), the front shroud (12) are equipped with driving pressing piece before The elastic component of cover board (12) sliding.

5. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 4, it is characterised in that: the pressing piece Including U-shaped bar (41) and it is set in the loop bar (4) at U-shaped bar (41) both ends, the one end of the loop bar (4) far from U-shaped bar (41) Equipped with (42) being rotatablely connected with front shroud (12), the elastic component includes the torsional spring (421) being set on the second shaft (42), Described torsional spring (421) one end and front shroud (12) are fixed, and the other end and the second shaft (42) are fixed.

6. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 5, it is characterised in that: the U-shaped bar (41) several briquettings (51) are equipped with along perpendicular to loop bar (4) length direction on middle part bottom surface, the briquetting (51) is along perpendicular to U Planar slip is arranged on U-shaped bar (41) where shape bar (41), and the U-shaped bar (41) is equipped with driving briquetting (51) towards front cover The pressure spring (52) of plate (12) sliding.

7. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 6, it is characterised in that: described second turn It is wound on axis (42) drawstring (422), described drawstring (422) one end and the second shaft (42) are fixed, and the other end protrudes into respective side First rotating shaft (2) in it is fixed with locating rod (22).

8. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 1, it is characterised in that: the front shroud (12) sealing ring (8) that can be abutted with shell (11) end face is equipped with towards the side of shell (11).

9. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 1 or 8, it is characterised in that: described outer The liner (6) for installing board and function panel is equipped in shell (11), the liner (6) is bonded with shell (11) inner wall, Vented cavity (61) are equipped at the top of the liner (6), are equipped with fan (62) in the vented cavity (61), the bottom of the vented cavity (61) Face and side, which are run through, is equipped with ventilation hole (63).

10. a kind of vehicular communication equipment cabinet for facilitating debugging according to claim 9, it is characterised in that: the shell (11) surface is equipped with several heat dissipation parting beads (7).