CN116122490A

CN116122490A - Integrated equipment takes soft membrane smallpox

Info

Publication number: CN116122490A
Application number: CN202310204855.5A
Authority: CN
Inventors: 刘畅; 闫志刚; 石珊珊; 张戈泽
Original assignee: Beijing Jianyuan Decoration Engineering Design Co ltd
Current assignee: Beijing Jianyuan Decoration Engineering Design Co ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-05-16
Anticipated expiration: 2043-03-03
Also published as: CN116122490B

Abstract

The utility model relates to an integrated equipment takes soft membrane smallpox belongs to the technical field of interior decoration, including fixing the fossil fragments on roof and installing a plurality of lamp boxes on fossil fragments, lamp area and transformer are integrated to be installed in the lamp box, and the lamp box bottom opening sets up, and the lamp box bottom articulates there is the enclosure frame, and the enclosure frame inner wall is fixed with the printing opacity soft membrane, a plurality of jacks have been seted up to the one side that the enclosure frame deviates from self articulated department, all slide in every jack have towards the inserted bar that the lamp box inside wall set up, and the lamp box inside wall has been seted up many and is used for supplying corresponding inserted bar male slot; the connecting components for simultaneously enabling the end parts of all the inserted bars to be inserted into the corresponding slots are arranged in the sealing frame, and the lamp box is provided with the quick disassembly components for enabling all the inserted bars to be separated from the corresponding slots simultaneously. The application can improve the efficiency of overhauling the lamp strip and the transformer.

Description

Integrated equipment takes soft membrane smallpox

Technical Field

The application relates to the technical field of interior decoration, in particular to a ceiling with a soft film for integrated equipment.

Background

The integrated equipment belt is an ideal choice for hallways, walkways and ceilings in public places such as shopping malls, supermarkets, commercial buildings, hospitals and transportation facilities. The integrated equipment has the advantages that the point light sources and the surface light sources can be combined randomly through diversification of combination, the lighting effect atmosphere is created, the design inspiration is highlighted, the individuality of owners is highlighted, and the surface of the ceiling is richer and more diversified.

The soft film ceiling is an indoor decoration material, and the light-transmitting film ceiling can be matched with various lighting systems (such as neon lights, fluorescent lights and LED lights) to create fantasy and shadowless indoor lighting effects.

The existing integrated equipment takes soft membrane smallpox including fixing the fossil fragments on roof and installing a plurality of lamp boxes on fossil fragments, lamp area and transformer integration are installed in the lamp box, and lamp box bottom opening sets up to articulated to have the sealed frame, sealed frame internal fixation has the printing opacity soft membrane, is equipped with a plurality of bolts between sealed frame and the lamp box, and the bolt penetrates the back with sealed frame threaded connection from the lamp box lateral wall.

To the related art among the above-mentioned, when overhauling lamp area and transformer, need unscrew each bolt in proper order, just can rotate the closed frame and open the lamp house, lead to the maintenance inefficiency of lamp area and transformer.

Disclosure of Invention

In order to improve the efficiency of overhauling lamp area and transformer, this application provides an integrated equipment area mantle smallpox.

The application provides an integrated equipment takes soft membrane smallpox adopts following technical scheme:

the utility model provides an integrated equipment takes soft membrane smallpox, includes the fossil fragments that are fixed on the roof and installs a plurality of lamp boxes on fossil fragments, and lamp area and transformer are integrated to be installed in the lamp box, and the lamp box bottom opening sets up, and the lamp box bottom articulates there is the sealed frame, and the sealed frame inner wall is fixed with the printing opacity soft membrane, a plurality of jacks have been seted up to the sealed frame one side that deviates from self articulated department, all slide in every jack have towards the inserted bar that the lamp box inside wall set up, and the lamp box inside wall has been seted up many and is used for supplying corresponding inserted bar male slot; the connecting components for simultaneously enabling the end parts of all the inserted bars to be inserted into the corresponding slots are arranged in the sealing frame, and the lamp box is provided with the quick disassembly components for enabling all the inserted bars to be separated from the corresponding slots simultaneously.

By adopting the technical scheme, after the lamp strip and the transformer are installed in the lamp box, the sealing frame is rotated, so that the light-transmitting soft film is just opposite to the lamp strip, and all the inserted bars are simultaneously inserted into the corresponding slots through the connecting assembly, thus the sealing frame and the lamp box can be fixed; when the lamp strip and the transformer are required to be overhauled, all the inserted bars are separated from the slots simultaneously through the quick disassembly assembly, and the sealing frame can be rotated to open the lamp box, so that the overhauling efficiency of the lamp strip and the transformer is improved.

Optionally, the coupling assembling includes rack, pivot and gear, and the rack is a plurality ofly altogether to correspond to slide in respective jack, the rack is located the one end of jack and corresponds the inserted bar fixed, and the pivot rotates to be connected in the closed frame, and the gear is a plurality ofly and corresponds with the rack one-to-one altogether, and the gear meshes with corresponding rack, and all gears all coaxial fixed cover are established in the pivot, and closed frame is worn out to pivot one end.

Through adopting above-mentioned technical scheme, when the closed frame rotates to mounted position, the inserted bar just sets up with corresponding slot, at this moment at the outside pivot that rotates of closed frame, can make all gears rotate, and the rack drives in the corresponding inserted bar inserts the slot, accomplishes the fixed in position of closed frame, has improved the maintenance efficiency of lamp area and transformer.

Optionally, the lateral wall that seals frame deviates from self articulated department is fixed with a plurality of stand pipes, stand pipe and jack one-to-one, inserted bar outer wall and stand pipe inner wall laminating.

Through adopting above-mentioned technical scheme, the setting of guide bar can improve the stability when the inserted bar removes, makes in the inserted bar can more accurate insert corresponding slot to improve the fixed efficiency of enclosure frame.

Optionally, the pivot height is less than the height of lamp house lower terminal surface, and the pivot is worn out the outer end of sealing the frame and is fixed with the hand wheel, and the pivot is located the outside position threaded connection of sealing the frame and has the nut, and the nut is used for pushing up tight sealing the frame lateral wall.

Through adopting above-mentioned technical scheme, rotate the hand wheel and make all inserted bars insert in the corresponding slot, twist the nut, the nut top is tight on the enclosure frame outer wall, can avoid the pivot to take place to rotate, improves the stability after the enclosure frame is fixed.

Optionally, one end of the rack in the closed frame is fixed with a limiting plate, and after the inserted bar is inserted into the corresponding slot, the limiting plate is abutted against the corresponding gear.

Through adopting above-mentioned technical scheme, the setting of limiting plate can avoid rack and gear separation, improves the stability of whole maintenance operation.

Optionally, quick dismantlement subassembly includes ejector pin, roof and reset spring, and the lamp house lateral wall has seted up the dismantlement hole that communicates in the slot, and ejector pin one end is located the dismantlement downthehole, and one end is located the lamp house outside and fixed with the roof, and reset spring fixes between lamp house outer wall and roof.

By adopting the technical scheme, when the lamp belt and the transformer are required to be overhauled, as the length of the lamp box can reach a plurality of meters, all the inserted bars are separated from the slots by rotating from one end of the rotating shaft with the length of a plurality of meters, which is very laborious and impractical; at this moment, the top plate is directly pressed, so that the ejector rod ejects the slot corresponding to the inserted rod, and meanwhile, the rack connected with the inserted rod drives the corresponding gear to rotate, so that the rotating shaft drives all other gears to rotate, the effect that all the inserted rods are separated from the slot simultaneously only by pressing one top plate is realized, and the overhaul efficiency of the lamp strip and the transformer is improved.

Optionally, a clamping groove is formed in one side of the ejector rod, a clamping spring is fixed in the clamping groove, and a clamping block fixed with the clamping spring is arranged at the opening of the clamping groove in a sliding manner; when the clamping spring is in a natural state, one end of the clamping block is positioned outside the clamping groove.

By adopting the technical scheme, because the area of the closed frame is large, tools are needed to be used or people are needed to support the closed frame before the closed frame is opened, so that the safety problem caused by the fact that the closed frame is directly rotated down when all the inserted bars leave the slots is avoided; after the ejector rod ejects the slot out of the inserting rod, the clamping block moves into the lamp box, the clamping spring drives one end of the clamping block to extend out of the clamping groove, and when the reset spring drives the ejector rod to reset, one side of the clamping block, which is positioned outside the clamping groove, abuts against the inner wall of the lamp box, so that the position of the ejector rod is fixed, the inserting rod is always in a state of being separated from the slot, and at the moment, a person pressing the top plate can replace a supporting tool or help to support the person for supporting the sealing frame to rotate down the sealing frame together, so that the maintenance efficiency is further improved.

Optionally, quick dismantlement subassembly includes ejector pin, swivel nut, screw rod and turning round, and the lamp house lateral wall has seted up the dismantlement hole that communicates in the slot, and the ejector pin is located the dismantlement downthehole, and the swivel nut is fixed at the lamp house lateral wall, screw rod and swivel nut threaded connection, and screw rod one end is located the dismantlement downthehole to with ejector pin coaxial rotation is connected, turning round is fixed at the screw rod outer end.

Through adopting above-mentioned technical scheme, when overhauling and need opening the closed frame, rotate the swivel and make the screw rod rotate, the screw rod is moved towards the slot top with the ejector pin to make the ejector pin push out the slot with the ejector pin, adopt to rotate the mode that advances in order to push out the slot with the ejector pin, compare in the direct mode that pushes out the slot with the ejector pin of straight line more convenient laborsaving, and the ejector pin is coaxial rotation with the screw rod and be connected, the screw rod is rotating when advancing, the ejector pin need not to rotate, further reduced frictional force, improve maintenance efficiency.

Optionally, a guide groove parallel to the disassembly hole is formed in one side of the disassembly hole, and a guide block positioned in the guide groove is fixed on the ejector rod.

Through adopting above-mentioned technical scheme, the screw rod is when rotating forward, and ejector pin and guide block slide together, have improved the slip stability of ejector pin.

Optionally, a distance is reserved between adjacent lamp boxes, and each outer side wall of the lamp boxes is provided with a heat dissipation hole.

By adopting the technical scheme, the heat in the lamp box is conveniently discharged, and the safety is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the lamp strip and the transformer are installed in the lamp box, the sealing frame is rotated, and all the inserting rods are simultaneously inserted into the corresponding slots through the connecting assembly, so that the sealing frame and the lamp box can be fixed; when the lamp strip and the transformer are required to be overhauled, all the inserted bars are separated from the slots simultaneously through the quick disassembly assembly, so that the sealing frame can be rotated to open the lamp box, and the overhauling efficiency of the lamp strip and the transformer is improved;

2. when the closed frame rotates to the installation position, the inserted link and the corresponding slot are arranged opposite to each other, at the moment, the rotating shaft is rotated outside the closed frame, so that all gears can rotate, the rack drives the corresponding inserted link to be inserted into the slot, the position fixing of the closed frame is completed, and the overhaul efficiency of the lamp belt and the transformer is improved;

3. when the closed frame is required to be opened for overhauling, the rotary head is rotated to enable the screw rod to rotate, the screw rod pushes the ejector rod towards the inserting groove, so that the ejector rod ejects the inserting groove from the inserting groove, the rotary advancing mode is adopted to enable the inserting rod to eject the inserting groove from the inserting groove more conveniently and more easily, and overhauling efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present application;

FIG. 2 is a partial cross-sectional view showing the connection assembly and the quick release assembly in example 1;

FIG. 3 is a partial cross-sectional view showing a hand wheel and nut in example 1;

fig. 4 is a partial cross-sectional view showing a quick disconnect assembly in example 2 of the present application.

In the figure, 1, keels; 2. a light box; 21. a heat radiation hole; 22. a slot; 23. disassembling the hole; 231. a guide groove; 232. a guide block; 3. a closing frame; 31. a jack; 32. a rod; 33. a guide tube; 4. a connection assembly; 41. a rack; 411. a limiting plate; 42. a rotating shaft; 421. a hand wheel; 422. a nut; 43. a gear; 5. quick disconnect assembly; 51. a push rod; 511. a clamping groove; 512. a clamping spring; 513. a clamping block; 52. a top plate; 53. a return spring; 54. a screw sleeve; 55. a screw; 56. and (5) turning the head.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

Example 1

The embodiment of the application discloses an integrated equipment with a soft film ceiling.

Referring to fig. 1, the integrated equipment takes soft membrane smallpox including fixing a plurality of fossil fragments 1 on the roof, fossil fragments 1 below hoist and mount have a plurality of lamp boxes 2, and lamp area and transformer integration are installed in lamp box 2, leave the distance between the adjacent lamp box 2, and a plurality of louvres 21 have all been seted up to every lateral wall of lamp box 2 to the heat in the lamp box 2 is discharged.

Referring to fig. 1 and 2, the lamp box 2 is a lower opening, the bottom of the lamp box 2 is hinged with a sealing frame 3, the top and the bottom of the sealing frame 3 are both fixed with light-transmitting soft films, the side wall of the sealing frame 3, which is far away from the hinge position of the sealing frame 3, is horizontally provided with a plurality of jacks 31 and is fixed with a plurality of guide pipes 33 which are in one-to-one correspondence with the jacks 31, inserting rods 32 slide in the jacks 31 and the guide pipes 33, the inner side wall of the lamp box 2 is provided with a plurality of slots 22 for inserting the corresponding inserting rods 32, the sealing frame 3 is internally provided with a connecting component 4 for simultaneously enabling the end parts of all the inserting rods 32 to be inserted into the corresponding slots 22, and the lamp box 2 is provided with a quick disassembly component 5 for enabling all the inserting rods 32 to be simultaneously separated from the corresponding slots 22.

When the lamp strip and the transformer are required to be overhauled, all the inserting rods 32 are simultaneously separated from the inserting grooves 22 through the quick-dismantling assembly 5, and the sealing frame 3 and the light-transmitting soft film are rotated down, so that the overhauling can be performed; after the maintenance is finished, the sealing frame 3 and the light-transmitting soft film are rotated upwards to reset, one ends of all the inserted bars 32 are simultaneously inserted into the corresponding slots 22 through the connecting assembly 4, the sealing frame 3 is fixed at the moment, and the maintenance efficiency of the lamp strip and the transformer is integrally improved.

Referring to fig. 2 and 3, the connection assembly 4 includes a rack 41 slidably connected in the insertion hole 31 and fixed with the insertion rod 32, a rotating shaft 42 horizontally rotatably connected in the closed frame 3 and having one end extending out of the closed frame 3, and gears 43 coaxially fixedly sleeved on the rotating shaft 42 and meshed with the racks 41 in one-to-one correspondence; a limiting plate 411 is vertically fixed at one end of the rack 41 positioned in the closed frame 3, and after the inserted link 32 is inserted into the slot 22, the limiting plate 411 abuts against the corresponding gear 43; the height of the rotating shaft 42 is lower than that of the lower end face of the lamp box 2, a hand wheel 421 is fixed at the outer end of the rotating shaft 42, threads are arranged on the circumferential side wall of the rotating shaft 42 located outside the sealing frame 3, and nuts 422 are connected with the threads.

After the sealing frame 3 rotates upwards to reset, the hand wheel 421 is screwed to enable the rotating shaft 42 to drive all the gears 43 to rotate, the gears 43 drive the inserting rods 32 to be inserted into the slots 22 through the corresponding racks 41 until the limiting plates 411 are abutted against the gears 43, after the rotating shaft 42 cannot rotate again, the nuts 422 are screwed again, the position of the rotating shaft 42 is fixed, the end parts of the inserting rods 32 are more stable in the slots 22, and the stability of the sealing frame 3 after being fixed is improved.

Referring to fig. 2, the outer side wall of the lamp box 2 is horizontally provided with a plurality of dismounting holes 23 which are communicated with the slots 22 in a one-to-one correspondence manner, and the quick dismounting assembly 5 comprises a push rod 51, a top plate 52 and a reset spring 53, wherein one end of the push rod 51 is positioned in the dismounting holes 23 and is used for pushing the inserting rod 32, the top plate 52 is fixed at the outer end of the push rod 51, and the reset spring 53 is fixed between the outer side wall of the lamp box 2 and the top plate 52 and is sleeved on the push rod 51; when the return spring 53 is in a natural state, the inner end of the ejector rod 51 is positioned in the dismounting hole 23. When the closed frame 3 needs to be opened, the top plate 52 is directly pressed, so that the push rod 51 pushes the inserting rods 32 out of the slots 22, and all the inserting rods 32 can be synchronously separated from the corresponding slots 22 through the racks 41, the gears 43 and the rotating shafts 42 only by pushing one inserting rod 32, so that the overhaul efficiency of the lamp belt and the transformer is improved.

Referring to fig. 2, a clamping groove 511 is vertically formed in the upper surface of the ejector rod 51 at a position far away from the top plate 52, a clamping spring 512 is vertically fixed in the clamping groove 511, and a clamping block 513 is fixed at the top of the clamping spring 512; when the clamping spring 512 is in a natural state, one end of the clamping block 513 is positioned in the clamping groove 511, and the other end extends out of the clamping groove 511. After the ejector rod 51 ejects the inserting rod 32 by pressing the top plate 52, the top plate 52 is continuously pushed until the clamping block 513 is separated from the slot 22 and ejects the clamping groove 511, at this time, the position of the ejector rod 51 is fixed, the inserting rod 32 is always in a state separated from the slot 22, and other actions can be conveniently performed by a worker pressing the top plate 52.

The implementation principle of embodiment 1 of the present application is: when the lamp strip and the transformer are required to be overhauled, the top plate 52 is pressed, the push rod 51 pushes the inserted rods 32 out of the slots 22, and all the inserted rods 32 can be synchronously separated from the corresponding slots 22 through the racks 41, the gears 43 and the rotating shafts 42 by pushing one inserted rod 32, so that the closed frame 3 and the light-transmitting soft film are rotated down for overhauling; after the maintenance is finished, the sealing frame 3 and the light-transmitting soft film are rotated upwards to reset, the hand wheel 421 is screwed to drive the rotating shaft 42 to drive all the gears 43 to rotate, the gears 43 drive the inserting rod 32 to be inserted into the slot 22 through the corresponding racks 41 until the limiting plate 411 abuts against the gears 43, after the rotating shaft 42 cannot rotate again, the nuts 422 are screwed again, the position of the rotating shaft 42 is fixed, and at the moment, the position of the sealing frame 3 is fixed, so that the maintenance efficiency of the lamp belt and the transformer is integrally improved.

Example 2

Referring to fig. 4, the quick release assembly 5 is different from embodiment 1 in that it includes a push rod 51 provided in a release hole 23 for pushing a plunger 32, a screw sleeve 54 fixed to the outer side wall of the lamp box 2 in one-to-one correspondence with the release hole 23, a screw 55 screw-coupled with the screw sleeve 54, and a swivel 56 fixed to the outer end of the screw 55, the inner end of the screw 55 being provided in the release hole 23 and coaxially and rotatably coupled with the push rod 51.

When the lamp strip and the transformer need to be overhauled, the rotating head 56 rotates and drives the screw 55 to rotate and advance towards the inside of the disassembly hole 23, so that the ejector rod 51 can slide and the inserting rod 32 is ejected out of the slot 22, and the lamp strip and the transformer are easier and more convenient to apply force in a rotating force applying mode than a linear pushing mode, so that the overhauling efficiency of the lamp strip and the transformer is improved.

Referring to fig. 4, a guide groove 231 is formed in the inner bottom wall of the removal hole 23 along the length direction of the push rod 51, and a guide block 232 sliding in the guide groove 231 is fixed to the lower surface of the push rod 51, so that the sliding stability of the push rod 51 can be improved.

The embodiments of the present invention are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides an integrated equipment takes soft membrane smallpox, includes to fix fossil fragments (1) on roof and install a plurality of lamp boxes (2) on fossil fragments (1), and lamp area and transformer integrated installation are in lamp box (2), and lamp box (2) bottom opening sets up, and lamp box (2) bottom articulates has sealed frame (3), and sealed frame (3) inner wall is fixed with printing opacity soft membrane, its characterized in that: a plurality of jacks (31) are formed in one side, away from the hinge position of the sealing frame (3), of each jack (31), inserting rods (32) arranged towards the inner side wall of the lamp box (2) are arranged in each jack (31) in a sliding mode, and a plurality of slots (22) for inserting the corresponding inserting rods (32) are formed in the inner side wall of the lamp box (2); the sealing frame (3) is internally provided with a connecting component (4) for simultaneously enabling the end parts of all the inserting rods (32) to be inserted into the corresponding slots (22), and the lamp box (2) is provided with a quick dismounting component (5) for enabling all the inserting rods (32) to be simultaneously separated from the corresponding slots (22).

2. An integrated device with flexible membrane ceiling according to claim 1, wherein: the connecting assembly (4) comprises a plurality of racks (41), rotating shafts (42) and gears (43), wherein the racks (41) are shared and correspondingly slide in respective jacks (31), one ends of the racks (41) located in the jacks (31) are fixed with corresponding inserted rods (32), the rotating shafts (42) are rotationally connected in the sealing frame (3), the gears (43) are shared and correspond to the racks (41) one by one, the gears (43) are meshed with the corresponding racks (41), all the gears (43) are coaxially and fixedly sleeved on the rotating shafts (42), and one ends of the rotating shafts (42) penetrate out of the sealing frame (3).

3. An integrated device with flexible membrane ceiling according to claim 2, characterized in that: the outer side wall of the position where the sealing frame (3) is away from the hinge joint of the sealing frame is fixedly provided with a plurality of guide pipes (33), the guide pipes (33) are in one-to-one correspondence with the jacks (31), and the outer wall of the inserting rod (32) is attached to the inner wall of the guide pipe (33).

4. An integrated device with flexible membrane ceiling according to claim 2, characterized in that: the height of the rotating shaft (42) is lower than that of the lower end face of the lamp box (2), a hand wheel (421) is fixed at the outer end of the rotating shaft (42) penetrating out of the sealing frame (3), a nut (422) is connected to the position, located outside the sealing frame (3), of the rotating shaft (42) in a threaded mode, and the nut (422) is used for propping up the outer side wall of the sealing frame (3).

5. An integrated device with flexible membrane ceiling according to claim 4, wherein: one end of the rack (41) positioned in the closed frame (3) is fixedly provided with a limiting plate (411), and after the inserted rod (32) is inserted into the corresponding slot (22), the limiting plate (411) is abutted against the corresponding gear (43).

6. An integrated device with flexible membrane ceiling according to claim 2, characterized in that: the quick disassembly assembly (5) comprises a push rod (51), a top plate (52) and a reset spring (53), wherein a disassembly hole (23) communicated with the slot (22) is formed in the outer side wall of the lamp box (2), one end of the push rod (51) is positioned in the disassembly hole (23), the other end of the push rod is positioned outside the lamp box (2) and fixed with the top plate (52), and the reset spring (53) is fixed between the outer wall of the lamp box (2) and the top plate (52).

7. An integrated device with flexible membrane ceiling according to claim 6, wherein: a clamping groove (511) is formed in one side of the ejector rod (51), a clamping spring (512) is fixed in the clamping groove (511), and a clamping block (513) fixed with the clamping spring (512) is arranged at the opening of the clamping groove (511) in a sliding mode; when the clamping spring (512) is in a natural state, one end of the clamping block (513) is positioned outside the clamping groove (511).

8. An integrated device with flexible membrane ceiling according to claim 2, characterized in that: the quick disassembly assembly (5) comprises an ejector rod (51), a threaded sleeve (54), a screw rod (55) and a rotating head (56), wherein the outer side wall of the lamp box (2) is provided with a disassembly hole (23) communicated with the slot (22), the ejector rod (51) is positioned in the disassembly hole (23), the threaded sleeve (54) is fixed on the outer side wall of the lamp box (2), the screw rod (55) is in threaded connection with the threaded sleeve (54), one end of the screw rod (55) is positioned in the disassembly hole (23) and is connected with the ejector rod (51) in a coaxial rotation mode, and the rotating head (56) is fixed at the outer end of the screw rod (55).

9. An integrated device with flexible membrane ceiling according to claim 8, wherein: a guide groove (231) parallel to the disassembly hole (23) is formed in one side of the disassembly hole (23), and a guide block (232) positioned in the guide groove (231) is fixed on the ejector rod (51).

10. An integrated device with flexible membrane ceiling according to claim 1, wherein: a distance is reserved between the adjacent lamp boxes (2), and each outer side wall of each lamp box (2) is provided with a heat dissipation hole (21).