CN115164123A

CN115164123A - Special spinning LED lamp tube capable of avoiding adhesion of scraps

Info

Publication number: CN115164123A
Application number: CN202210913754.0A
Authority: CN
Inventors: 邬国平
Original assignee: Individual
Current assignee: Anhui Zhaoli Opto Electronics Technology Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-10-11
Anticipated expiration: 2042-08-01
Also published as: CN115164123B

Abstract

The invention discloses a special textile LED lamp tube capable of avoiding adhesion of scraps, which is provided with a mounting plate, wherein a lamp tube body is mounted on the inner side of the mounting plate; the method comprises the following steps: the light-gathering plates are movably arranged on two sides of the mounting plate, and the top edges of the light-gathering plates are connected with the mounting plate through return springs; the motor is arranged on the side surface of the mounting plate through a bolt; the fan blade is fixedly arranged at one end of the reciprocating screw rod, which is far away from the motor, and a protective cover is sleeved on the outer side of the fan blade; the second gas pipe is fixed at the bottom of the protective cover, and one end, far away from the protective cover, of the second gas pipe is fixedly connected with the fixed cylinder. This can avoid special LED fluorescent tube of weaving of sweeps adhesion can clear up the sweeps of the different position adhesions in LED fluorescent tube surface, under the condition that does not influence LED fluorescent tube illumination, can guarantee illumination brightness to can dispel the heat to the lamp stand at LED fluorescent tube both ends, avoid the sweeps of adhesion and the normal use of high temperature influence LED fluorescent tube.

Description

Special spinning LED lamp tube capable of avoiding adhesion of scraps

Technical Field

The invention relates to the technical field of LED lamp tubes, in particular to a special LED lamp tube for textile, which can avoid adhesion of scraps.

Background

Because the textile technology is more delicate, various textile equipment need to use corresponding LED lamp tubes to illuminate in the use process, and a large amount of flocks are generated in the textile process, and when the flocks are adhered to the LED lamp tubes, the brightness of the flocks can be influenced, for example, a special illuminating device of a water jet loom with the publication number of CN211667656U is characterized in that: comprises a shell, a lamp holder and a baffle plate; the utility model discloses a lamp holder, including lamp holder cover, baffle, lamp stand, air inlet, lamp holder, air outlet, ventilating strip, net membrane, casing back, the lamp holder cover merge fixed connection be in inside the shell, the baffle can dismantle with shell fixed connection, one side fixed mounting that the lamp holder extends the length direction has radiator fan, and the opposite side is equipped with gets the wind gap, the lamp holder extends the both sides of width direction and all is equipped with the wallboard, two be interior cavity between the wallboard, be equipped with the fluorescent tube mount pad that can install two kind at least LED fluorescent tubes on the interior cavity, the shell extends the both sides of length direction and all is equipped with ventilating strip, ventilating strip surface still is equipped with the nethike embrane, the shell back is equipped with angle adjusting device for change lighting device illumination angle. However, the special lighting device of the water-jet loom still has the following disadvantages in the actual use process:

1. in the use process of the traditional special LED lamp tube for textile, the scraps adhered to the surface of the LED lamp tube can be cleaned only by manual wiping or wind power in a single direction, so that the phenomenon of incomplete cleaning still exists, and the lighting effect of the LED lamp tube is influenced;

2. in addition, when the LED lamp tube is used, the heat of the lamp holder positions at the two ends of the LED lamp tube is far higher than the heat of the lamp tube positions, and the heat dissipation effect on the lamp holders cannot be achieved by the traditional mode of cleaning the surface of the lamp tube by wind power.

Aiming at the problems, innovative design is urgently needed on the basis of the original LED lamp tube.

Disclosure of Invention

The invention aims to provide a special textile LED lamp tube capable of avoiding adhesion of scraps, and aims to solve the problems that the phenomenon of incomplete cleaning exists in the background technology, the lighting effect of the LED lamp tube is still influenced, and the traditional mode of cleaning the surface of the lamp tube by wind power cannot achieve the heat dissipation effect on a lamp holder.

In order to achieve the purpose, the invention provides the following technical scheme: a special textile LED lamp tube capable of avoiding adhesion of scraps is provided with a mounting plate, a lamp tube body is mounted on the inner side of the mounting plate, and two ends of the lamp tube body are connected with each other through a lamp holder and the mounting plate;

the method comprises the following steps:

the light-gathering plates are movably arranged on two sides of the mounting plate, and the top edges of the light-gathering plates are connected with the mounting plate through return springs;

the motor is arranged on the side face of the mounting plate through a bolt, an output shaft of the motor is connected with a reciprocating screw rod, a movable block is movably sleeved on the outer side of the reciprocating screw rod, and a connecting ring is fixed at the bottom of the movable block;

the fan blade is fixedly arranged at one end, away from the motor, of the reciprocating screw rod, a protective cover is sleeved on the outer side of the fan blade and fixed on two sides of the mounting plate, a first gas pipe is fixed at the top of the protective cover, a gas transmission cavity is formed in the inner top surface of the mounting plate, the bottom of the gas transmission cavity is connected with the top of the movable block through a connecting hose, an atomizer is arranged on the outer side of the connecting hose, and a liquid storage cavity is formed in the mounting plate on the outer side of the atomizer;

the second gas-supply pipe is fixed in the bottom of protection casing, the one end and the fixed cylinder fixed connection of keeping away from the protection casing of second gas-supply pipe, and fixed cylinder sleeve locates the outside of lamp stand.

Preferably, revolution mechanic is constituteed with the mounting panel to the solar panel, and 2 solar panels's rotation opposite direction to the rotation range of solar panel is 0-180, and the bottom edge of solar panel and the one end fixed connection of haulage rope set up through the rotation of solar panel simultaneously, can adjust the illumination zone of fluorescent tube body.

Preferably, the other end winding of haulage rope is on adjusting the pole, and adjusts the pole activity and set up the top at the mounting panel to adjusting pole and mounting panel and rotating the connection for the damping, adjusting the pole through rotating and can carrying out rolling or extension to 2 sections haulage ropes simultaneously, and then drive 2 solar panels and expand or accomodate.

Preferably, the movable block is threaded connection with the reciprocating screw rod, and the top of movable block and the interior top surface laminating of mounting panel slide, the horizontally relative slip structure is constituteed to go-between and fluorescent tube body, and the go-between is transparent ya keli board material, and accessible movable block drives the go-between at the horizontally round trip movement in the fluorescent tube body outside when reciprocating screw rod rotates, realizes the clearance to the different positions in fluorescent tube body surface, does not influence the illumination of fluorescent tube body simultaneously again.

Preferably, the inside of go-between is seted up the fixed chamber of arc structure, and the inner wall of go-between is equiangular to be provided with the gas outlet head to fixed chamber is linked together through movable block and coupling hose, therefore the gaseous accessible coupling hose in the gas transmission chamber gets into the movable block, then gets into fixed chamber and discharges from the gas outlet head of different angles and blow to the surface of fluorescent tube body.

Preferably, the top of protection casing is linked together through first gas-supply pipe and gas transmission chamber each other, and the bottom of protection casing is linked together through second gas-supply pipe and solid fixed cylinder to protection casing and solid fixed cylinder are all about the vertical axis symmetric distribution of fluorescent tube body, therefore during the first gas-supply pipe of wind-force accessible entering gas transmission chamber that the flabellum produced after rotating, accessible second gas-supply pipe got into solid fixed cylinder simultaneously.

Preferably, the inside activity of a fixed section of thick bamboo is provided with the loose collar, and the outer wall of loose collar is the angle fixed with the fixed plate to the one end that the loose collar was kept away from to the fixed plate closely laminates with the inner wall of a fixed section of thick bamboo and slides, and after gas got into fixed section of thick bamboo inside, can blow to the fixed plate and then drive the loose collar rotatory.

Preferably, the movable ring and the fixed cylinder form a relative rotation structure, an air inlet is reserved in the side face of the fixed plate, a connecting cavity is formed in the movable ring, air can blow the movable ring to rotate, and the air can enter the connecting cavity through the air inlet.

Preferably, the fixed cylinder is communicated with the connecting cavity through the air inlet hole, the cross section of the connecting cavity is of an arc-shaped structure, the inner wall of the movable ring is provided with an air nozzle, and gas in the connecting cavity can be discharged from the air nozzle at last to cool the lamp holder.

Compared with the prior art, the invention has the beneficial effects that: this can avoid special LED fluorescent tube of weaving of sweeps adhesion can clear up the sweeps of the different position adhesions in LED fluorescent tube surface, under the condition that does not influence LED fluorescent tube illumination, can guarantee illumination brightness to can dispel the heat to the lamp stand at LED fluorescent tube both ends, avoid the sweeps of adhesion and the normal use that high temperature influences the LED fluorescent tube, concrete content is as follows:

1. part of wind power generated by rotation of the fan blades can enter the gas transmission cavity through the first gas transmission pipe and then enter the connecting ring through the connecting hose and the movable block, so that scraps adhered to different positions on the lamp tube body can be cleaned in the horizontal back and forth movement process of the connecting ring, liquid in the liquid storage cavity can be converted into water vapor through the arrangement of the atomizer, the liquid and the gas are synchronously sprayed out, the efficiency of cleaning the scraps can be improved, the heat of the lamp tube body is dissipated, the liquid in the liquid transmission cavity has temperature, but the temperature is not higher than that of the lamp tube body, and therefore the sprayed water vapor cannot damage the lamp tube body;

2. the other part of wind power generated by the rotation of the fan blades can enter the fixed cylinder through the second gas pipe, and when gas impacts the fixed plate, the movable ring can be driven to rotate so as to drive the movable ring to rotate outside the lamp holder, and the gas in the fixed cylinder can not be influenced to enter the connecting cavity through the gas inlet hole, so that the gas can be driven to be discharged from the gas nozzle in a rotating mode, and the heat dissipation of the position of the lamp holder is realized;

3. when 2 solar panels are in vertical state, can play the fine spotlight effect to the fluorescent tube body, and when carrying out the rolling to the traction band through rotating the regulating lever, can drive 2 synchronous rotations of solar panel and open, and then enlarge the scope that the fluorescent tube body can throw light on, satisfy different lighting demands, consequently rotate the illumination that realizes different scopes to different angles through the solar panel.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side sectional view of the present invention;

FIG. 3 is a schematic top view of an adjustment lever according to the present invention;

FIG. 4 is a schematic view of a front cross-sectional view of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention;

FIG. 6 is a schematic side sectional view of a connecting ring according to the present invention;

FIG. 7 is a schematic side sectional view of the fixing cylinder according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 7 at B.

In the figure: 1. mounting a plate; 2. a lamp tube body; 3. a lamp socket; 4. a light-gathering plate; 5. a return spring; 6. a hauling rope; 7. adjusting a rod; 8. an electric motor; 9. a reciprocating screw rod; 10. a movable block; 11. a connecting ring; 12. a fixed cavity; 13. an air outlet head; 14. a fan blade; 15. a protective cover; 16. a first gas delivery pipe; 17. an air delivery cavity; 18. a connecting hose; 19. an atomizer; 20. a liquid storage cavity; 21. a second gas delivery pipe; 22. a fixed cylinder; 23. a movable ring; 24. a fixing plate; 25. an air inlet; 26. a connecting cavity; 27. an air nozzle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: a textile special LED lamp tube capable of avoiding adhesion of scraps is provided with an installation plate 1, a lamp tube body 2 is installed on the inner side of the installation plate 1, and two ends of the lamp tube body 2 are connected with the installation plate 1 through a lamp holder 3; the method comprises the following steps: the light gathering plates 4 are movably arranged on two sides of the mounting plate 1, and the top edges of the light gathering plates 4 are connected with the mounting plate 1 through return springs 5; the motor 8 is arranged on the side surface of the mounting plate 1 through a bolt, an output shaft of the motor 8 is connected with a reciprocating screw rod 9, a movable block 10 is movably sleeved on the outer side of the reciprocating screw rod 9, and a connecting ring 11 is fixed at the bottom of the movable block 10; the fan blade 14 is fixedly arranged at one end, far away from the motor 8, of the reciprocating screw rod 9, a protective cover 15 is sleeved on the outer side of the fan blade 14, the protective cover 15 is fixed on two sides of the mounting plate 1, a first air conveying pipe 16 is fixed on the top of the protective cover 15, an air conveying cavity 17 is formed in the inner top surface of the mounting plate 1, the bottom of the air conveying cavity 17 is connected with the top of the movable block 10 through a connecting hose 18, an atomizer 19 is arranged on the outer side of the connecting hose 18, and a liquid storage cavity 20 is formed in the mounting plate 1 on the outer side of the atomizer 19; the second air delivery pipe 21 is fixed at the bottom of the protective cover 15, one end of the second air delivery pipe 21, which is far away from the protective cover 15, is fixedly connected with the fixed cylinder 22, and the fixed cylinder 22 is sleeved outside the lamp holder 3.

As shown in fig. 1-3, the light-gathering plate 4 and the mounting plate 1 form a rotating structure, the rotating directions of the 2 light-gathering plates 4 are opposite, the rotating range of the light-gathering plates 4 is 0-180 degrees, meanwhile, the bottom edge of the light-gathering plate 4 is fixedly connected with one end of the hauling rope 6, when the illumination range needs to be adjusted, the adjusting rod 7 can be rotated to wind the 2 groups of hauling ropes 6, so that the 2 light-gathering plates 4 can be driven to synchronously rotate and unfold; the other end of the traction rope 6 is wound on the adjusting rod 7, the adjusting rod 7 is movably arranged at the top of the mounting plate 1, the adjusting rod 7 is in damping rotation connection with the mounting plate 1, when the light-gathering plate 4 is rotated and opened, illumination in a larger range can be achieved, when the adjusting rod 7 is rotated reversely, the traction rope 6 is removed from being wound, the light-gathering plate 4 is driven to rotate reversely through resilience of the reset spring 5, and therefore illumination in a small range can be achieved, the illumination range can be adjusted rapidly through rotation of the adjusting rod 7, and different spinning requirements are met;

as shown in fig. 1-2 and fig. 4-6, the movable block 10 is in threaded connection with the reciprocating screw rod 9, the top of the movable block 10 is in fit sliding with the inner top surface of the mounting plate 1, the connecting ring 11 and the lamp tube body 2 form a horizontal relative sliding structure, the connecting ring 11 is made of a transparent acrylic plate, after the adjustment of the illumination range is completed, the motor 8 drives the reciprocating screw rod 9 to rotate, and then the movable block 10 drives the connecting ring 11 to horizontally move back and forth on the lamp tube body 2, so that not only can the scraps adhered to the lamp tube body 2 be cleaned in the moving process, but also the illumination of the lamp tube body 2 cannot be influenced, and the connecting hose 18 can be driven to stretch, so that the transmission of gas cannot be influenced; a fixed cavity 12 with an arc structure is formed inside the connecting ring 11, an air outlet head 13 is arranged on the inner wall of the connecting ring 11 at an equal angle, the fixed cavity 12 is communicated with a connecting hose 18 through a movable block 10, and the reciprocating screw rod 9 can drive the fan blades 14 to synchronously rotate when rotating, so that wind power is generated and enters the protective cover 15; the top of the protective cover 15 is communicated with the air transmission cavity 17 through a first air transmission pipe 16, the bottom of the protective cover 15 is communicated with the fixed cylinder 22 through a second air transmission pipe 21, the protective cover 15 and the fixed cylinder 22 are symmetrically distributed about the vertical axis of the lamp tube body 2, air in the protective cover 15 enters the air transmission cavity 17 through the first air transmission pipe 16 and then enters the movable block 10 through the connecting hose 18, liquid in the liquid storage cavity 20 can be converted into water mist through the atomizer 19 and synchronously input into the movable block 10 through the connecting hose 18 in the air transmission process, and finally the air with the water mist enters the fixed cavity 12 and is discharged from the air outlets 13 distributed at different angles, so that the cleaning of waste scraps on the lamp tube body 2 can be realized, the temperature on the surface of the lamp tube body 2 can be reduced, and the water mist is arranged in a trace amount, so that the temperature drying on the surface of the lamp tube body 2 can be realized after the spraying, and the illumination of the lamp tube body 2 cannot be influenced;

as shown in fig. 4 and fig. 7-8, a movable ring 23 is movably disposed inside the fixed cylinder 22, a fixed plate 24 is fixed on the outer wall of the movable ring 23 at an equal angle, one end of the fixed plate 24 away from the movable ring 23 is closely attached to the inner wall of the fixed cylinder 22 to slide, and a part of the gas in the protective cover 15 can enter the fixed cylinder 22 through the second gas pipe 21; the movable ring 23 and the fixed cylinder 22 form a relative rotation structure, an air inlet 25 is reserved on the side surface of the fixed plate 24, a connecting cavity 26 is arranged inside the movable ring 23, and when gas enters the fixed cylinder 22, the gas can impact the fixed plate 24 to drive the movable ring 23 to rotate, so that the movable ring 23 can rotate outside the lamp holder 3; fixed section of thick bamboo 22 passes through inlet port 25 and connects chamber 26 to communicate each other, and the cross-section of connecting chamber 26 is the arc structure, the inner wall of activity ring 23 is provided with air nozzle 27, it still can get into through inlet port 25 and connect in the chamber 26 simultaneously to get into the gas in the fixed section of thick bamboo 22, can not influence the rotation that drives activity ring 23 again, last gas can be followed air nozzle 27 and discharged and blown to lamp stand 3 surfaces, because activity ring 23 is in rotating condition all the time, consequently, gas can blow to the different angles of lamp stand 3, realize comprehensive cooling.

The working principle is as follows: as shown in fig. 1-8, firstly, the illumination range of the lamp tube body 2 can be adjusted according to the textile requirements, and the traction rope 6 can be wound or extended by rotating the adjusting rod 7, so that the light-gathering plate 4 can be driven to rotate and be opened or accommodated, and illumination in different ranges can be realized;

then the motor 8 drives the reciprocating screw rod 9 to rotate, the connecting ring 11 is driven to horizontally move back and forth, and gas generated by the rotation of the fan blades 14 can be discharged from the gas outlet head 13, so that scraps adhered to different positions on the surface of the lamp tube body 2 can be cleaned through the moving connecting ring 11;

meanwhile, partial wind power can enter the fixed cylinder 22 and is finally discharged from the air nozzle 27 to blow to the surface of the lamp holder 3, so that the lamp holder 3 is at normal temperature and cannot be influenced by adhered scraps, and the normal illumination of the lamp tube body 2 is further ensured.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A special textile LED lamp tube capable of avoiding adhesion of scraps is provided with an installation plate (1), a lamp tube body (2) is installed on the inner side of the installation plate (1), and two ends of the lamp tube body (2) are connected with the installation plate (1) through lamp holders (3);

it is characterized by comprising:

the light-gathering plates (4) are movably arranged on two sides of the mounting plate (1), and the top edges of the light-gathering plates (4) are connected with the mounting plate (1) through return springs (5);

the motor (8) is installed on the side face of the installation plate (1) through a bolt, an output shaft of the motor (8) is connected with a reciprocating screw rod (9), a movable block (10) is movably sleeved on the outer side of the reciprocating screw rod (9), and a connecting ring (11) is fixed at the bottom of the movable block (10);

the fan blade (14) is fixedly installed at one end, away from the motor (8), of the reciprocating screw rod (9), a protective cover (15) is sleeved on the outer side of the fan blade (14), the protective cover (15) is fixed on two sides of the mounting plate (1), a first air conveying pipe (16) is fixed to the top of the protective cover (15), an air conveying cavity (17) is formed in the inner top surface of the mounting plate (1), the bottom of the air conveying cavity (17) is connected with the top of the movable block (10) through a connecting hose (18), an atomizer (19) is installed on the outer side of the connecting hose (18), and a liquid storage cavity (20) is formed in the mounting plate (1) on the outer side of the atomizer (19);

the second gas-supply pipe (21) is fixed in the bottom of protection casing (15), the one end and the fixed section of thick bamboo (22) fixed connection of keeping away from protection casing (15) of second gas-supply pipe (21), and fixed section of thick bamboo (22) cover is located the outside of lamp stand (3).

2. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 1, wherein: rotation structure is constituteed with mounting panel (1) in solar panel (4), and the rotation direction of 2 solar panels (4) is opposite to the rotation range of solar panel (4) is 0-180, and the bottom edge of solar panel (4) and the one end fixed connection of haulage rope (6) simultaneously.

3. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 2, wherein: the other end of the traction rope (6) is wound on the adjusting rod (7), the adjusting rod (7) is movably arranged at the top of the mounting plate (1), and the adjusting rod (7) is in damping rotation connection with the mounting plate (1).

4. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 1, wherein: the movable block (10) and the reciprocating screw rod (9) are in threaded connection, the top of the movable block (10) and the inner top surface of the mounting plate (1) are attached to slide, the connecting ring (11) and the lamp tube body (2) form a horizontal relative sliding structure, and the connecting ring (11) is made of transparent acrylic plates.

5. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 1, wherein: the air outlet device is characterized in that a fixed cavity (12) of an arc-shaped structure is formed in the connecting ring (11), an air outlet head (13) is arranged on the inner wall of the connecting ring (11) at an equal angle, and the fixed cavity (12) is communicated with a connecting hose (18) through a movable block (10).

6. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 1, wherein: the top of protection casing (15) is passed through first gas-supply pipe (16) and is communicate each other with gas transmission chamber (17), and the bottom of protection casing (15) is linked together through second gas-supply pipe (21) and fixed section of thick bamboo (22) to protection casing (15) and fixed section of thick bamboo (22) all are about the vertical axis symmetric distribution of fluorescent tube body (2).

7. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 1, wherein: the inside activity of fixed cylinder (22) is provided with activity ring (23), and the outer wall of activity ring (23) is the angle such as being fixed with fixed plate (24) to the one end that activity ring (23) were kept away from in fixed plate (24) closely laminates with the inner wall of fixed cylinder (22) and slides.

8. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 7, wherein: the movable ring (23) and the fixed cylinder (22) form a relative rotation structure, an air inlet (25) is reserved on the side face of the fixed plate (24), and a connecting cavity (26) is arranged inside the movable ring (23).

9. The LED lamp tube special for textile capable of avoiding the adhesion of scraps as claimed in claim 8, wherein: the fixed cylinder (22) is communicated with the connecting cavity (26) through an air inlet hole (25), the cross section of the connecting cavity (26) is of an arc-shaped structure, and an air nozzle (27) is arranged on the inner wall of the movable ring (23).