CN213930472U

CN213930472U - LED bulb convenient to heat dissipation

Info

Publication number: CN213930472U
Application number: CN202023321176.7U
Authority: CN
Inventors: 张晓艳
Original assignee: Ningbo Mostar Optoelectronics Co ltd
Current assignee: Ningbo Mostar Optoelectronics Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-10
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a LED bulb convenient to heat dissipation, including the lamp body, the circuit board is installed to the inside joint of lamp body. Has the advantages that: when the heat dissipation fan begins to work through external controller, make the inside steam directional flow of lamp body, blow to the aviation baffle, get into the inside in two sets of wind-guiding holes respectively along the lateral wall of bell jar, finally strike two sets of vibrations orifice plates, two sets of vibrations orifice plate atresss do the motion of keeping away from each other, two sets of interception pipes follow two sets of vibrations orifice plates and are synchronous motion, after the heat dissipation, four sets of expanding spring of group support two sets of vibrations orifice plates and do reset motion in opposite directions, when the inside other end of two sets of annular grooves is strikeed respectively to the one end of two sets of vibrations orifice plates, two sets of vibrations orifice plates drive two sets of filter screen vibrations, two sets of filter screen surface adsorption's dust receives gravity and inertial effect, break away from two sets of filter screens, through the vibrations orifice plate that sets up, can two sets of filter screens of self-cleaning, need not the manual cleanness of user, bring the facility for the clean use of the LED bulb of being convenient for the heat dissipation.

Description

LED bulb convenient to heat dissipation

Technical Field

The utility model relates to a LED bulb technical field particularly, relates to a LED bulb convenient to heat dissipation.

Background

The LED bulb is a solid semiconductor device capable of converting electric energy into visible light, can directly convert electricity into light, has the characteristics of high efficiency and long service life, can be continuously used for 10 ten thousand hours, is 100 times longer than a common incandescent bulb, is used for preventing the heating temperature of the LED bulb from being higher when the LED bulb is actually used, is used for conveniently radiating the LED bulb, and has the advantages of high radiating efficiency, convenience in installation, good lighting effect and the like.

Present LED bulb convenient to heat dissipation, there is the filter screen inside many fixed mounting of venthole, in the external air of filter screen, adsorb the contact dust easily, for ensuring filter screen surface is clean, need the manual cleanness of user, because the eminence use is placed more to the LED bulb of being convenient for heat dissipation, it is comparatively loaded down with trivial details to dismantle the installation, bring inconvenience for the clean use of radiating LED bulb of being convenient for, secondly, the user is when the radiating LED bulb of being convenient for is changed in the maintenance of eminence, dismantle the radiating LED bulb of being convenient for that finishes, because the glass cover does not stably place the position for the curved surface structure, it places to need the user to get back to ground, it is comparatively inconvenient and increase danger to go back and forth to ascend a height repeatedly, bring inconvenience for the change of radiating LED bulb is used.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a LED bulb convenient to heat dissipation possesses can self-cleaning filter screen, can be temporarily unsettled advantage of the radiating LED bulb of being convenient for, and then solves the problem among the above-mentioned background art.

(II) technical scheme

For the advantage that realizes above-mentioned can self-cleaning filter screen, can be temporarily unsettled radiating LED bulb of being convenient for, the utility model discloses a concrete technical scheme as follows:

the utility model provides a LED bulb convenient to heat dissipation, includes the lamp body, the circuit board is installed to the inside joint of lamp body, and the upper portion fixed mounting of circuit board has the heat dissipation fan, the lower part fixed mounting of circuit board has the LED chip, the lateral wall of lamp body is provided with two sets of ventholes, and two sets of the inside slidable mounting of venthole has the vibrations orifice plate, and two sets of the inside of vibrations orifice plate all runs through and installs the filter screen, the lower part fixed mounting of lamp body has the glass cover, the upper portion fixed mounting of lamp body has the screw lamp holder, and the lateral wall of screw lamp holder cup joints and installs the mount pad to the inside lateral wall of mount pad is provided with the internal thread, unsettled rope is installed to the both sides of lamp body.

Furthermore, annular grooves are formed in the side walls of the two groups of air outlets, intercepting pipes and two groups of expansion springs are fixedly mounted at the far ends of the two groups of vibration pore plates, one ends of the two groups of expansion springs at the same side are fixedly connected with the end portions of the inner parts of the annular grooves, air deflectors are arranged on the top surface of the inner part of the lamp shell, and two groups of air guide holes are formed in the air deflectors.

Furthermore, the openings of the two groups of air guide holes respectively correspond to the two groups of air outlet holes.

Furthermore, the vertical section size of the two groups of intercepting pipes is the same as that of the two groups of air outlets, and the vertical section size of the two groups of vibrating pore plates is the same as that of the two groups of annular grooves.

Furthermore, the lower part of the air deflector is provided with a tapered groove, and two groups of air guide holes are formed along the side wall of the tapered groove.

Furthermore, one end of each of the two groups of the hanging ropes is fixedly provided with a mounting plate, the opposite ends of the two groups of the mounting plates are fixedly connected with the outer side wall of the lamp housing, the side wall of the mounting seat is sleeved with a square frame pipe, the side wall of the square frame pipe is provided with two groups of first thread through holes and two groups of fixing plates, the inside of the two groups of the first thread through holes is provided with a first fixing bolt in a penetrating way, one end of the two groups of the first fixing bolts is tightly contacted with the outer side wall of the mounting seat, the end surface of the square frame pipe is provided with two groups of bearings in a penetrating way, the inside of the two groups of the bearings is provided with a rotating shaft in a penetrating way, the other ends of the two groups of the hanging ropes penetrate through the lower part of the square frame pipe, the other ends of the two groups of the hanging ropes are fixedly connected with the two groups of the rotating shafts respectively, the upper parts of the two groups of the fixing plates are provided with second thread through holes, and the inside of the two groups of the second thread through holes is provided with a second fixing bolt in a penetrating way, and one end of each of the two groups of second fixing bolts is respectively in close contact with the side walls of the external ends of the two groups of rotating shafts.

Furthermore, the two groups of first thread through holes are meshed with the two groups of first fixing bolts, and the two groups of second thread through holes are meshed with the two groups of second fixing bolts.

Further, the screw lamp cap is meshed with the internal thread.

(III) advantageous effects

Compared with the prior art, the utility model provides a LED bulb convenient to heat dissipation possesses following beneficial effect:

(1) the utility model adopts the vibration orifice plate, when the heat radiation fan starts to work through the external controller, the hot air in the lamp shell flows directionally, blows to the wind guide plate, enters the inner parts of the two groups of wind guide holes respectively along the side wall of the conical groove, finally strikes the two groups of vibration orifice plates, the two groups of vibration orifice plates are forced to move away from each other, at the moment, the four groups of expansion springs are in a compression state, the two groups of interception pipes follow the two groups of vibration orifice plates to move synchronously, because the vertical section size of the two groups of interception pipes is the same as that of the two groups of air outlet holes, external dust can not enter the inner parts of the two groups of annular grooves, after the heat radiation is finished, the four groups of expansion springs are under the self elastic action to prop against the two groups of vibration orifice plates to move in opposite directions, when one end of the two groups of vibration orifice plates respectively strikes the other end of the inner parts of the two groups of annular grooves, the two groups of vibration orifice plates drive the two groups of vibration filter screens, the two sets of filter screen surface adsorption's dust receives gravity and inertial effect, breaks away from two sets of filter screens, through the vibrations orifice plate that sets up, can two sets of filter screens of self-cleaning, need not the manual cleanness of user, brings the facility for the clean use of the LED bulb of being convenient for heat dissipation.

(2) The utility model adopts the hanging rope, when the hanging LED bulb which is convenient for heat dissipation needs to be hung, two groups of second thread through holes are meshed with two groups of second fixing bolts, the two groups of second fixing bolts are rotated anticlockwise, when one ends of the two groups of second fixing bolts are respectively separated from the external side walls of the two groups of rotating shafts, the screw lamp holder is reutilized to be meshed with the internal thread, the lamp shell is disassembled by anticlockwise rotation, when the screw lamp holder is separated from the mounting seat, the lamp shell moves downwards under the action of gravity, the two groups of rotating shafts are driven to rotate by the two groups of hanging ropes, when the two groups of hanging ropes are straightened, the lamp shell and the glass cover are hung without manual taking, when the two groups of hanging ropes need to be reset, the two groups of bearings are utilized to rotate the two groups of rotating shafts, the two groups of hanging ropes are wound on the side walls of the two groups of rotating shafts, when the two groups of hanging ropes are moved to the original positions, the two groups of second fixing bolts are rotated clockwise, when the one end of two sets of second fixing bolt respectively with the external terminal lateral wall in close contact with of two sets of pivots, stop motion, two sets of pivots are stabilized fixed this moment, through the unsettled rope that sets up, can be temporarily unsettled be convenient for radiating LED bulb, and the change of being convenient for radiating LED bulb is used and is brought the facility.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an LED bulb convenient for heat dissipation according to the present invention;

FIG. 2 is a perspective view of the vibrating orifice plate of the present invention;

FIG. 3 is a schematic cross-sectional view of a portion of the square tube of the present invention;

FIG. 4 is an enlarged view of A of FIG. 1 according to the present invention;

fig. 5 is an enlarged view of B in fig. 1 according to the present invention.

In the figure:

1. a lamp housing; 2. a circuit board; 3. a heat dissipation fan; 4. an LED chip; 5. an air outlet; 6. vibrating the orifice plate; 7. a glass cover; 8. a screw cap; 9. a mounting seat; 10. an internal thread; 11. a hanging rope; 12. an annular groove; 13. intercepting a pipe; 14. filtering with a screen; 15. an air deflector; 16. a wind guide hole; 17. a tension spring; 18. mounting a plate; 19. a square frame tube; 20. a first threaded through hole; 21. a first fixing bolt; 22. a rotating shaft; 23. a second fixing bolt; 24. a bearing; 25. a fixing plate; 26. a second threaded through hole.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides a LED bulb convenient to heat dissipation.

Referring to the drawings and the detailed description, as shown in fig. 1-5, an LED bulb convenient for heat dissipation according to an embodiment of the present invention comprises a lamp housing 1, a circuit board 2 is snap-fitted in the lamp housing 1, a heat dissipation fan 3 is fixedly mounted on the upper portion of the circuit board 2, an LED chip 4 is fixedly mounted on the lower portion of the circuit board 2, two sets of air outlets 5 are disposed on the sidewall of the lamp housing 1, a vibration orifice plate 6 is slidably mounted in the two sets of air outlets 5, a filter screen 14 is penetratingly mounted in the two sets of vibration orifice plates 6, a glass cover 7 is fixedly mounted on the lower portion of the lamp housing 1, a screw cap 8 is fixedly mounted on the upper portion of the lamp housing 1, a mounting base 9 is sleeved on the sidewall of the screw cap 8, an internal thread 10 is disposed on the internal sidewall of the mounting base 9, and suspending ropes 11 are mounted on two sides of the lamp housing 1, the circuit board 2, the heat dissipation fan 3, the LED chip 4, the screw cap 8 and the mounting base 9 are all of the conventional structure, and are not described herein.

In one embodiment, the inner side walls of the two sets of air outlets 5 are provided with annular grooves 12, the far ends of the two sets of vibrating orifice plates 6 are fixedly provided with intercepting pipes 13 and two sets of telescopic springs 17, one end of the two sets of telescopic springs 17 on the same side is fixedly connected with the inner end part of the one set of annular grooves 12, the inner top surface of the lamp shell 1 is provided with an air deflector 15, and the air deflector 15 is internally provided with two sets of air guiding holes 16, when the heat dissipation fan 3 starts to work through an external controller, hot air in the lamp shell 1 flows directionally to blow the air deflector 15, respectively enters the two sets of air guiding holes 16 along the side wall of the conical groove, finally hits the two sets of vibrating orifice plates 6, the two sets of vibrating orifice plates 6 move far away from each other under stress, at the moment, the four sets of telescopic springs 17 are in a compressed state, the two sets of intercepting pipes 13 move synchronously along with the two sets of vibrating orifice plates 6, because the vertical cross-sectional dimensions of the two sets of intercepting pipes 13 are the same as the vertical cross-sectional dimensions of air outlets 5, unable inside that gets into two sets of annular groove 12 of outside dust, after the heat dissipation, four group's expanding spring 17 receive self elasticity effect, support two sets of vibrations orifice plate 6 and do the motion that resets in opposite directions, when the inside other end of two sets of annular groove 12 of striking respectively of the one end of two sets of vibrations orifice plate 6, two sets of vibrations orifice plate 6 drive two sets of filter screen 14 vibrations, two sets of filter screen 14 surface adsorption's dust receives gravity and inertial effect, break away from two sets of filter screens 14, through the vibrations orifice plate 6 that sets up, can two sets of filter screens 14 of self-cleaning, need not the manual cleanness of user, bring the facility for the clean use of the LED bulb of being convenient for the heat dissipation.

In one embodiment, the openings of the two sets of air guiding holes 16 correspond to the two sets of air outlet holes 5, respectively, so as to guide the flowing air to the two sets of air outlet holes 5.

In one embodiment, the vertical cross-sectional dimensions of the two groups of intercepting pipes 13 are the same as the vertical cross-sectional dimensions of the two groups of air outlets 5, and the vertical cross-sectional dimensions of the two groups of vibrating pore plates 6 are the same as the vertical cross-sectional dimensions of the two groups of annular grooves 12, so that the situation that flowing air cannot collide due to overlarge vertical cross-sectional dimensions of the two groups of vibrating pore plates 6 and the vertical cross-sectional dimensions of the two groups of vibrating pore plates 6 cannot transversely move is avoided.

In one embodiment, the lower portion of the air guiding plate 15 is provided with a tapered groove, and two sets of air guiding holes 16 are formed along the side wall of the tapered groove, and the tapered groove plays a role of collecting air.

In one embodiment, the two groups of suspension ropes 11 are fixedly mounted with mounting plates 18 at one end, and the two groups of mounting plates 18 are fixedly connected with the outer side wall of the lamp housing 1 at the opposite ends, the side wall of the mounting seat 9 is sleeved with a square frame tube 19, and the side wall of the square frame tube 19 is provided with two groups of first threaded through holes 20 and two groups of fixing plates 25, the two groups of first threaded through holes 20 are internally provided with first fixing bolts 21, and one ends of the two groups of first fixing bolts 21 are closely contacted with the outer side wall of the mounting seat 9, the end surface of the square frame tube 19 is provided with two groups of bearings 24, and the two groups of bearings 24 are internally provided with rotating shafts 22, the other ends of the two groups of suspension ropes 11 are penetrated through the lower part of the square frame tube 19, the other ends of the two groups of suspension ropes 11 are respectively fixedly connected with the two groups of rotating shafts 22, the upper parts of the two groups of fixing plates 25 are provided with second threaded through holes 26, and the two groups of second fixing bolts 23 are internally provided, and one end of two sets of second fixing bolts 23 is contacted with the side wall of the external end of two sets of rotating shafts 22 respectively, when the suspended LED bulb convenient for heat dissipation is needed, two sets of second screw through holes 26 are meshed with two sets of second fixing bolts 23, two sets of second fixing bolts 23 are rotated anticlockwise, when one end of two sets of second fixing bolts 23 is separated from the external side wall of two sets of rotating shafts 22 respectively, the screw lamp holder 8 is meshed with the internal thread 10, the lamp housing 1 is dismounted by anticlockwise rotation, when the screw lamp holder 8 is separated from the mounting seat 9, the lamp housing 1 moves downwards under the action of gravity, the two sets of rotating shafts 22 are driven to rotate by two sets of suspending ropes 11, when the two sets of suspending ropes 11 are straightened, the lamp housing 1 and the glass cover 7 are suspended without manual taking, when the two sets of suspending ropes 11 need to be reset, two sets of bearings 24 are utilized to rotate two sets of rotating shafts 22, so that the two sets of suspending ropes 11 are wound on the side wall of two sets of rotating shafts 22, when two sets of unsettled ropes 11 removed original position, two sets of second fixing bolt 23 of clockwise rotation, when the one end of two sets of second fixing bolt 23 respectively with two sets of pivots 22 external terminal lateral wall in close contact with, stop motion, two sets of pivots 22 are stabilized fixed this moment, through unsettled rope 11 that sets up, can be temporarily unsettled be convenient for radiating LED bulb, the change of being convenient for radiating LED bulb uses and brings the facility.

In one embodiment, the two sets of first threaded through holes 20 are engaged with the two sets of first fixing bolts 21, and the two sets of second threaded through holes 26 are engaged with the two sets of second fixing bolts 23, so as to stably fix the square tube 19 and the two sets of rotating shafts 22.

In one embodiment, the screw cap 8 is engaged with the internal thread 10 to facilitate the removal of the lamp housing 1.

The working principle is as follows:

when the LED bulb convenient for heat dissipation is actually used, the working state of the heat dissipation fan 3 is controlled by an external controller, so that hot air in the lamp shell 1 flows directionally, blows to the air guide plate 15, enters the two air guide holes 16 along the side wall of the conical groove respectively, finally strikes the two vibration pore plates 6, the two vibration pore plates 6 are forced to move away from each other, at the moment, the four groups of expansion springs 17 are in a compression state, the two groups of interception pipes 13 move synchronously along with the two groups of vibration pore plates 6, because the vertical cross-sectional dimensions of the two groups of interception pipes 13 are the same as those of the two groups of air outlet holes 5, external dust cannot enter the two groups of annular grooves 12, after heat dissipation, the four groups of expansion springs 17 are under the action of self elasticity to abut against the two groups of vibration pore plates 6 to move in opposite directions, when one end of the two groups of vibration pore plates 6 strikes the other end of the two groups of annular grooves 12 respectively, the two groups of vibrating pore plates 6 drive the two groups of filter screens 14 to vibrate, dust adsorbed on the surfaces of the two groups of filter screens 14 is separated from the two groups of filter screens 14 under the action of gravity and inertia, the two groups of filter screens 14 can be automatically cleaned without manual cleaning by a user, convenience is brought to cleaning and use of the LED bulb convenient for heat dissipation, meanwhile, when the LED bulb convenient for heat dissipation needs to be suspended, the two groups of second threaded through holes 26 are meshed with the two groups of second fixing bolts 23, the two groups of second fixing bolts 23 are rotated anticlockwise, when one ends of the two groups of second fixing bolts 23 are respectively separated from the external end side walls of the two groups of rotating shafts 22, the screw lamp cap 8 is meshed with the internal threads 10, the lamp housing 1 is detached by anticlockwise rotation, when the screw cap 8 is separated from the mounting base 9, the lamp housing 1 moves downwards under the action of gravity, the two groups of suspended ropes 11 drive the, when two sets of unsettled ropes 11 are very straight, lamp body 1 and glass cover 7 are unsettled, need not manually to take, when two sets of unsettled ropes 11 that need reset, utilize two sets of bearings 24, rotatory two sets of pivot 22, make two sets of unsettled ropes 11 twine the lateral wall at two sets of pivot 22, when two sets of unsettled ropes 11 removed original position, two sets of second fixing bolt 23 of clockwise rotation, when the one end of two sets of second fixing bolt 23 respectively with the external terminal lateral wall in close contact with of two sets of pivot 22, stop motion, two sets of pivot 22 are stabilized fixed this moment, unsettled rope 11 through setting up, can temporarily unsettled radiating LED bulb of being convenient for, the change of radiating LED bulb of being convenient for is used and is brought the facility.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a LED bulb convenient to heat dissipation, a serial communication port, includes lamp body (1), circuit board (2) are installed to the inside joint of lamp body (1), and the upper portion fixed mounting of circuit board (2) has heat dissipation fan (3), the lower part fixed mounting of circuit board (2) has LED chip (4), the lateral wall of lamp body (1) is provided with two sets of venthole (5), and two sets of the inside slidable mounting of venthole (5) has vibrations orifice plate (6), and two sets of the inside of vibrations orifice plate (6) all runs through and installs filter screen (14), the lower part fixed mounting of lamp body (1) has glass cover (7), the upper portion fixed mounting of lamp body (1) has screw lamp holder (8), and the lateral wall of screw lamp holder (8) cup joints and installs mount pad (9), and the inside lateral wall of mount pad (9) is provided with internal thread (10), and suspended ropes (11) are arranged on two sides of the lamp shell (1).

2. The LED bulb convenient for heat dissipation according to claim 1, wherein two sets of the air outlet holes (5) are provided with annular grooves (12) on the inner side walls, two sets of the vibration hole plates (6) are fixedly provided with intercepting pipes (13) and two sets of expansion springs (17) on the far ends, one ends of the two sets of expansion springs (17) on the same side are fixedly connected with the inner end of one set of the annular grooves (12), the inner top surface of the lamp housing (1) is provided with an air deflector (15), and two sets of air guiding holes (16) are arranged inside the air deflector (15).

3. The LED bulb convenient for heat dissipation according to claim 2, wherein the openings of the two sets of air guide holes (16) correspond to the two sets of air outlet holes (5), respectively.

4. The LED bulb convenient for heat dissipation according to claim 2, wherein the vertical cross-sectional dimensions of the two groups of intercepting tubes (13) are the same as those of the two groups of air outlet holes (5), and the vertical cross-sectional dimensions of the two groups of vibrating orifice plates (6) are the same as those of the two groups of annular grooves (12).

5. The LED bulb convenient for heat dissipation according to claim 2, wherein a tapered groove is formed at the lower part of the air deflector (15), and two sets of air guide holes (16) are formed along the side wall of the tapered groove.

6. The LED bulb convenient for heat dissipation according to claim 1, wherein one end of each of two groups of the suspending ropes (11) is fixedly provided with a mounting plate (18), the opposite ends of the two groups of the mounting plates (18) are fixedly connected with the outer side wall of the lamp housing (1), the side wall of the mounting seat (9) is sleeved with a square tube (19), the side wall of the square tube (19) is provided with two groups of first threaded through holes (20) and two groups of fixing plates (25), first fixing bolts (21) are respectively installed inside the two groups of the first threaded through holes (20) in a penetrating manner, one ends of the two groups of the first fixing bolts (21) are respectively in close contact with the outer side wall of the mounting seat (9), two groups of bearings (24) are respectively installed on the end surface of the square tube (19) in a penetrating manner, and a rotating shaft (22) is respectively installed inside the two groups of the bearings (24) in a penetrating manner, two sets of the other end of unsettled rope (11) runs through the lower part of square frame pipe (19), and is two sets of the other end of unsettled rope (11) respectively with two sets of pivot (22) fixed connection, two sets of the upper portion of fixed plate (25) all is provided with second screw thread through-hole (26), and two sets of second screw thread through-hole (26) inside all runs through and installs second fixing bolt (23), and two sets of the one end of second fixing bolt (23) respectively with two sets of the lateral wall in close contact with of pivot (22) external end.

7. The LED bulb facilitating heat dissipation according to claim 6, wherein two sets of the first threaded through holes (20) are engaged with two sets of the first fixing bolts (21), and two sets of the second threaded through holes (26) are engaged with two sets of the second fixing bolts (23).

8. The LED bulb facilitating heat dissipation according to claim 1, wherein the screw cap (8) is engaged with the internal thread (10).