WO2016046000A1 - Tige télescopique avec mécanisme de verrouillage - Google Patents

Tige télescopique avec mécanisme de verrouillage Download PDF

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Publication number
WO2016046000A1
WO2016046000A1 PCT/EP2015/070930 EP2015070930W WO2016046000A1 WO 2016046000 A1 WO2016046000 A1 WO 2016046000A1 EP 2015070930 W EP2015070930 W EP 2015070930W WO 2016046000 A1 WO2016046000 A1 WO 2016046000A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking
telescopic rod
outer tube
inner tube
locking body
Prior art date
Application number
PCT/EP2015/070930
Other languages
German (de)
English (en)
Inventor
Christian Starken
Hannes Bartram
Original Assignee
Lufthansa Technik Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lufthansa Technik Ag filed Critical Lufthansa Technik Ag
Publication of WO2016046000A1 publication Critical patent/WO2016046000A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/105—Telescoping systems locking in discrete positions, e.g. in extreme extended position

Definitions

  • the invention relates to a telescopic rod with locking mechanism having the features of the preamble of claim 1.
  • the document DE 78 04 933 Ul describes a length-adjustable ski pole with an outer tube and an inner tube.
  • An elastic locking body which is connected to the inner tube via a nylon bush, exerts on an inner surface of the outer tube from a radial force, whereby a frictional connection between the inner surface and the locking body is made.
  • the frictional force can be increased by the locking body is compressed in the axial direction by a rotational movement of a screw, resulting in an expansion of the locking body in the radial direction.
  • the inner tube can be locked in such a way via a frictional connection in a desired position.
  • the disadvantage of such a solution is that by a mere frictional connection there is a risk of loosening the connection.
  • telescopic rods are subject to a wide variety of requirements.
  • Such telescope On the one hand, rods should be reliably lockable, on the other hand they must be able to withstand the typical stresses during operation of the vehicle. This means in particular vibration-induced stresses.
  • This problem can occur, for example, on the telescopic rod of an aircraft engine.
  • cowling In order to be able to carry out certain maintenance measures on the engine, it is necessary to open the engine casing, the so-called cowling. The opening is made by a pivoting movement of a part of the housing upwards.
  • one or more telescopic rods are used for support.
  • the telescopic rod counteracts the forces that arise from the weight of the Cowling and the impact of the Cowling on the surface of the wind.
  • the telescopic pole must be securely locked for this purpose in the extended state, otherwise the aircraft mechanic could be injured when working on the engine and thus the safety at work is not guaranteed.
  • Another problem arises from the fact that such a telescopic rod is also carried during operation of the aircraft, which means that the telescopic rod is exposed to the usual vibrations in the operation of an engine.
  • a bolt is used, which is assigned to an inner tube, which is pushed by a socket in a long groove on the inside of the outer tube.
  • this is biased by a coil spring.
  • the preloaded coil spring is due to the vibrations of the engine during operation for
  • a positive locking element is provided for locking the locking body to the outer tube, wherein a radial movement of the positive locking element is effected by a rotational movement of the inner tube relative to the outer tube about a longitudinal axis of the telescopic rod.
  • a radial movement is to be understood as meaning a movement or displacement which has a radial component, wherein the ratio of the radial component to an axial component of the movement is preferably greater than 1/100, more preferably greater than 1/10, in particular preferably greater than 1
  • the connection of the inner tube to the outer tube in the axial direction via the interlocking element ensures reliable locking.
  • the interlocking element can be controlled by a rotational movement of the inner tube relative to the locking body, ie, the inner tube can be locked relative to the outer tube in the axial direction when the inner tube is rotated relative to the locking body in a first rotational direction.
  • the lock can be achieved by a rotational movement of the inner tube relative to the locking body in a second direction of rotation, so that the inner tube is again displaceable relative to the outer tube.
  • the locking by a rotational movement of the inner tube allows a particularly easy handling of the locking mechanism.
  • the outer tube is non-rotatably connected to the cowling, so that the control of the locking takes place by a rotation of the inner tube.
  • the locking can also be effected by a rotation of the outer tube, when the inner tube is held against rotation.
  • the form-fitting element is an engagement element which is adapted to engage in a groove arranged on an inner wall of the outer tube.
  • the engagement element thus forms together with the groove a positive locking means.
  • the arrangement of the groove on the inner wall of the outer tube a simple structural implementation of the positive locking means is possible.
  • the engagement element connected to the inner tube is preferably designed such that it projects at least partially into the groove in the radial direction.
  • the engagement element may also be shaped so that it corresponds completely or partially with the groove shape.
  • the engagement of the engagement member in the groove creates a releasable, positive connection in the axial direction between the inner tube and the outer tube.
  • At least one predefined end position which also forms the arresting position, is determined by the positive connection via the positive-locking means.
  • only one end position is provided, but alternatively also a plurality of end positions are conceivable.
  • a further end position is provided in a collapsed state.
  • the inner tube can be brought by the displacement relative to the outer tube in a predefined end position, wherein in the end position, the engagement element can engage in the groove.
  • the engagement element can thus engage in the groove only after reaching the end position.
  • the lock in a non-desired position can be prevented. In this case, it is particularly avoided that an exclusively frictional connection is made before reaching the predefined end position, by which the strength in the axial direction would be reduced in comparison to a positive connection. It is thus not possible to lock the telescopic rod in a non-secure position, which improves operability and safety.
  • the engagement element is held free of tension in the unlocked state. It can thus be prevented that the engagement element is biased against the inner tube or on the outer tube. A vibration-induced excitation of the engagement element thus does not lead to damage to the contact surfaces between the engagement member and the inner tube or outer tube. By this type of storage, the wear is reduced by vibration-induced excitation of the engagement member and thus increases the life of the locking mechanism.
  • the engagement element In the unlocked state, the engagement element can preferably also be completely configured. be stored clock-free relative to the inner and outer tube, whereby the wear can be further reduced.
  • the engagement element is arranged on the blocking body. Since the locking body is connected to the inner tube, the engagement element can be moved in this way by a movement of the inner tube within the outer tube. The engagement element is held free of bias by the locking body, wherein the locking body simultaneously supports the engagement element such that it is movable against a biasing force in the radial direction.
  • the inner tube is connected via a thread with the locking body, so that a rotation of the inner tube relative to the locking body can be converted into an axial movement.
  • a rotation of the inner tube relative to the outer tube about the longitudinal axis, there is also in the axial direction to a displacement of the inner tube relative to the outer tube.
  • the control of the engagement element can take place, so that the engagement element is preferably moved radially outward into the groove provided for an axial movement of the inner tube in the direction of the blocking body.
  • the telescopic rod has a rotatably connected to the locking body holding part, wherein the holding part engages in the end position in a holding element on the outer tube, so that a rotationally fixed connection between the outer tube and the locking body.
  • the blocking body is therefore preferably positively connected to a holding means which can engage in the retaining element on the inner wall of the outer tube.
  • the positive connection is formed by teeth which are provided on the holding element or on the holding means.
  • the connection between the holding part and the holding element may also be by a frictional connection.
  • the holding part is provided on the locking body.
  • An additional connection to a separate holding part can be dispensed with.
  • the holding part is formed in this case by a positive locking element, which can be incorporated, for example, by machining in the locking body. More preferably, the production can be done by investment casting, by generative manufacturing or by surface finishing.
  • the end position of the locking body is fixed in the axial direction by a shoulder on the inner wall of the outer tube.
  • the heel preferably prevents a further pulling apart of the telescopic rods, and thus the user can easily adjust the predefined end position.
  • the state in which the telescopic rod is pushed together can also be defined as the end position is.
  • the holding part In the end position, the holding part is in engagement with the holding element, so that a rotation of the inner tube relative to the outer tube results in a relative movement between the blocking body and the inner tube.
  • the locking element is not in the final position, the locking element rotates with a rotation of the inner tube, so that a locking of the telescopic rod would not be possible.
  • the engagement element is movable in the radial direction by an elastic portion of the locking body.
  • the engagement element is for this purpose preferably axially spaced from a base element of the locking body, so that the elastic portion is formed by a longitudinally extending in the axial direction element of the locking body.
  • the elastic portion is rod or bar-shaped.
  • the elastic portion may also be formed by a cylindrical element whose radius is expandable.
  • the elastic portion relative to the engagement member is arranged so that the elastic portion is not biased, as long as the engagement member is in an unlocked basic position. For a lock, the engagement element must be moved against the spring force of the elastic portion in the groove. It is thus ensured that the engagement element is reliably moved out of the groove again after unlocking.
  • an end section of the inner tube pointing in the direction of the blocking body has a conical shape. Due to the conical shape of the end portion, the engagement element from the basic position against a spring force is moved radially outward, as soon as the inner tube moves in the direction of the locking body. The engagement element engages in the designated groove, whereby a positive connection between the outer tube and the locking body ent stands. Further, the engagement member is pressed by the conical shape into the groove, so that the engagement member is keyed in the groove. Due to the pressing action, a frictional connection is also produced between the contact surfaces of the engagement element and the groove. This has the consequence that also the inner tube is connected to the outer tube in the axial direction and by the construction of the invention
  • the contact surfaces are preferably designed so that they are in the locked state at least partially mutually form Corresponding.
  • a limiting element is provided on the locking body in the axial edge regions of the thread, so that the axial movement of the inner tube is limited relative to the locking body. It can thus be ensured that the thread that forms the connection between the inner tube and the locking body, not disengaged. This is particularly advantageous because the relative position between the locking body and the inner tube in the mounted state is not visible.
  • the locking body comprises a connecting element, wherein the connecting element is adapted to connect the locking body via the thread with the inner tube.
  • a damping means is provided in an end region of the outer tube, so that the blocking body in the combined pushed state abuts the damping means.
  • the damping means has the function of acting as a damper when pushing together the telescopic rod, so that the pushing together of the telescopic rod can be done gently.
  • a bias state that is, the locking body is in the collapsed state to the damping means, that this is pressure-loaded in the axial direction. If now the telescopic rod is caused to vibrate by the operation of the engine, the vibration energy can be dissipated by the damping means, so that the vibrations of the blocking body relative to the outer tube are reduced.
  • the damping means is annular and has a conical shape on the side facing the blocking body. Due to the conical shape is a radial centering of the
  • Locking body in the collapsed state possible.
  • the vibration of the lock body with respect to the outer tube in the axial direction but also the vibration in the radial direction can be damped.
  • the damping means is formed by plastic foam.
  • Cellular Vulkollan is preferably used as the plastic foam.
  • the properties of the cellular Vulkollans are also suitable for the usual environmental conditions in the aviation sector.
  • Vulkollan is characterized by a low water absorption and by slight deviations of the material properties at temperatures between -30 ° C and +80 ° C.
  • the vibration-damping properties of the damping means can be maintained during the entire flight phase with almost constant quality.
  • circumferential grooves or grooves are provided on the outer surface of the damping means.
  • FIG. 1 shows a telescopic rod with locking mechanism in an end position in the unlocked state.
  • Fig. 3 is a telescopic rod with locking mechanism
  • Fig. 1 shows a telescopic rod 1 according to the invention with a locking device in a predefined end position.
  • the telescopic rod 1 comprises an inner tube 3, which is mounted axially displaceably in an outer tube 2.
  • the inner tube 3 is connected via a thread 10 with a locking body 4, which serves to lock the inner tube 3 relative to the outer tube 2.
  • the locking takes place via a positive locking means 5 which comprises an engagement element 7 and a groove 8.
  • the engagement element 7 is preferably associated with the locking body 4, whereas the groove 8 is preferably provided on the inner wall of the outer tube 2.
  • Fig. 1 shows the locking body 4 in a two-part embodiment.
  • the blocking body 4 essentially comprises a base body 18, an elastic portion 14 and a connecting element 9. Alternatively, it would also be possible to carry out the blocking body 4 in one piece.
  • the main body 18 is rotatably connected to the connecting element 9 via a first connecting means 19, which is preferably formed by a screw connection.
  • the inner tube 3 facing the end portion of the connecting element 9 has an external thread which engages in an internal thread of the inner tube 3; the connecting element 9 and the inner tube 3 are thus connected to each other via the thread 10.
  • a rotational movement of the inner tube 3 with respect to the connecting element 9 in a first direction of rotation causes the inner tube 3 to move in the direction of the arrow 21.
  • a rotation in an opposite second direction of rotation a movement takes place opposite to the arrow 21.
  • On the connecting element 9, a first and a second limiting element 16 and 17 are respectively provided in the edge regions of the thread 10.
  • the limiting elements 16 and 17 ensure that the thread 10 is always in engagement and thus the inner tube 3 is reliably connected to the connecting element 9.
  • the first delimiting element 16 is preferably executed by a step with undercut on the wave-like connecting element 9.
  • the second limiting element 17 is preferably formed by a disc, which is preferably held by a second connecting means 20; the second connection means 20 is preferably formed by a screw.
  • the thread direction of the screw 20 is opposite to the thread direction of the thread 10 to prevent accidental loosening of the screw 20. Therefore, a left-hand thread is preferably used for the thread of the screw 20.
  • the inner tube 3 must be brought relative to the outer tube 2 in a predefined end position.
  • the end position in which the engagement element 7 can engage in the groove 8 not readily apparent. It is therefore provided on the inner wall of the outer tube 2, a shoulder 13, on which the locking body 4, preferably the base body 18, can abut positively in the axial direction.
  • the end position is reached when the telescopic rod 1 is pulled out.
  • a viewing window can be provided on the outer tube 3, whereby it can be checked whether the end position has been reached.
  • the inner tube 3 For locking the inner tube 3 relative to the outer tube 2 in the end position, the inner tube 3 must be rotatable relative to the locking body 4. Since the blocking body 4 is mounted in the outer tube 2, this can not be readily rotatably mounted. For this reason, a holding element 12 is provided in the region of the shoulder 13 on the inner wall of the outer tube 2. The holding element 12 preferably extends in the axial direction. Alternatively or additionally, the holding element 12 may also be provided on the radially extending surface of the shoulder 13. On the blocking body 4, preferably on the base body 18, a corresponding holding part 11 is provided, so that in the end position, a rotationally fixed connection between the outer tube 2 and the locking body 4 can be produced. Preferably, the holding element 12 is formed by an internal toothing, in which an external toothing of the holding part 11 engages. The rotationally fixed connection between the outer tube 2 and the locking body 4 may alternatively be formed by a frictional connection.
  • the main body 18 is connected via an elastic portion 14 with the engagement member 7.
  • the base body 18, the portion 14 and the engagement member 7 are formed by a component, whereby the assembly cost can be reduced.
  • the base body 18, the subsection 14 and the engagement element 7 can also be formed by individual components, which are connected to one another via connecting means.
  • the elastic partial section 14 can extend axially in the direction of the inner tube 3, starting from the main body 18.
  • the elastic portion 14 is preferably rod-shaped or bar-shaped. guided, so that an elasticity of the portion 14 is achieved in the radial direction by the axial spacing.
  • at least two elastic sections 14 are provided which are preferably not connected to each other in the circumferential direction, so that a movement in the radial direction is not hindered.
  • exactly two elastic sections 14 are provided, which are arranged offset with respect to the longitudinal axis 6 by 180 °, more preferably four sections 14 are provided, in particular preferably six sections 14 are provided. With more than two elastic sections, these are preferably arranged symmetrically with respect to the longitudinal axis 6.
  • the elastic portion 14 is preferably aligned parallel to the rotation axis 6 in the non-prestressed state, see Fig. 1.
  • a preferably conical end portion of the inner tube 3 in the axial direction against the elastic portion 14 and against the engagement element 7.
  • an initial position is provided, in which the elastic portion 14 is not biased and there is no contact between the conical end portion 15. Only by a rotation of the inner tube 3 relative to the locking body 4 does it come to a contact between the elastic portion 14 and the engagement member 7.
  • the telescopic rod 1 In this locked state, which is shown in Fig. 2, the telescopic rod 1 remains by two self-locking mechanisms of action. On the one hand causes the conical shape of the end portion 15 is a wedging or jamming of the end portion 15 relative to the elastic portion 14 and the engagement member 7. On the other hand, the thread 10 forms a frictional connection between the connecting element 9 and the inner tube 3, which only by a Rotation of the inner tube 3 relative to the locking body 4 can be solved. Further, the force flow between the inner tube 3 and outer tube 2 in the locked state at a load of the telescopic rod 1 by axial forces substantially directly through the positive locking means 5. Overcoming the frictional force of the thread 10 by stressing the telescopic rod 1 in the axial direction can thus be excluded.
  • the groove bottom of the groove 8 is not aligned parallel to the longitudinal axis 6, but at an angle a.
  • the angle a is between 5 ° and 70 °, more preferably between 10 ° and 30 °, and most preferably about 20 °. Due to the advantageous adjustment of the angle, the self-locking effect can be improved by the wedging or jamming and thus the power transmission can be improved.
  • the inner tube 3 is rotated relative to the locking body 4 in a second rotational direction, so that the inner tube 3 is moved against the locking body 4 against the direction of the arrow 21.
  • the conical end portion 15 of the inner tube 3 thereby releases the movement of the engagement member 7 radially inward.
  • the engagement element 7 is moved out of the groove 8, so that the connection between the inner tube 3 and the outer tube 2 is canceled and the telescopic rod 1 is again adjustable in length.
  • the damping means 22 is arranged inside the outer tube 2.
  • the damping means 22 consists of a plastic foam, more preferably of cellular Vulkollan.
  • the basic shape of the damping means 22 is annular, so that it can be easily inserted into the outer tube 2.
  • the damping means 22 has a conical shape on the side facing the blocking body 4.
  • the angle ⁇ is between 80 ° and 140 °, more preferably between 100 ° and 120 °, in particular preferably at about
  • the base body 18 also has a conical shape, so that the centering effect is further improved.
  • the telescopic rod 1 shown in Fig. 3 consists of three sub-rods.
  • the inner tube 3 assigned to the left-hand blocking body 4 becomes the outer tube 25 of the additional blocking body 24.
  • a further damping means 23 is arranged in the inner tube 3 such that the blocking body 24 abuts against the damping means 23 in the collapsed state.
  • the inner tube 3 forms for the locking body 24 in turn an outer tube 25, so that the solution according to the invention is applicable to telescopic rods 1 with any number of sub-rods.
  • the outer tube 2 consists of two parts 2a and 2b, wherein the connection of the parts 2a and 2b takes place via an adhesive connection.
  • the length of the adhesive bond in the axial direction is preferably between 5 and 25 mm, more preferably between 12 and 20 mm.
  • the sub-rods of the telescopic rod 1 are made of CFRP.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne une tige télescopique (1) munie d'un mécanisme de verrouillage comprenant un tube intérieur (3) monté coulissant dans un tube extérieur (2). Un corps de blocage (4) relié au tube intérieur (3) peut être verrouillé avec le tube extérieur (2). À l'état verrouillé, au moins le mouvement axial entre le corps de blocage (4) et le tube extérieur (2) est bloqué, il existe un élément à coopération de formes (7) servant au verrouillage du corps de blocage (4) avec le tube extérieur (2), et un mouvement radial de l'élément à coopération de formes (7) est produit par un mouvement de rotation du tube intérieur (3) par rapport au tube extérieur (2) sur un axe longitudinal (6) de la tige télescopique (1).
PCT/EP2015/070930 2014-09-24 2015-09-14 Tige télescopique avec mécanisme de verrouillage WO2016046000A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219305.2A DE102014219305A1 (de) 2014-09-24 2014-09-24 Teleskopstange mit Verriegelungsmechanismus
DE102014219305.2 2014-09-24

Publications (1)

Publication Number Publication Date
WO2016046000A1 true WO2016046000A1 (fr) 2016-03-31

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ID=54140446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/070930 WO2016046000A1 (fr) 2014-09-24 2015-09-14 Tige télescopique avec mécanisme de verrouillage

Country Status (2)

Country Link
DE (1) DE102014219305A1 (fr)
WO (1) WO2016046000A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106308051A (zh) * 2016-09-26 2017-01-11 宁波汇五洲智能科技有限公司 一种单电机三管式可升降办公桌
US11519293B2 (en) 2019-10-11 2022-12-06 Rolls-Royce Plc Cleaning system and a method of cleaning
WO2023070536A1 (fr) * 2021-10-28 2023-05-04 中山市科曼摄影器材有限公司 Tige télescopique
WO2023246769A1 (fr) * 2022-06-22 2023-12-28 际诺思股份公司 Mécanisme de liaison et tête de lit réglable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8530227U1 (de) * 1984-11-14 1985-12-05 Fehlbaum & Co., Dornach Dreh- und höhenverstellbarer Einsäulen-Präsentierständer
EP0314357A2 (fr) * 1987-10-21 1989-05-03 Steccone Products Company, Inc. Dispositif de fixation intérieure pour barres tubulaires
DE202005016155U1 (de) * 2005-10-14 2005-12-29 Marchhart Ges.M.B.H. Vorrichtung zum aneinander Fixieren und Lösen von ineinander teleskopierten Profilen
WO2014046554A1 (fr) * 2012-09-21 2014-03-27 Jason Paul Rogers Améliorations d'éléments télescopiques et relatives à ceux-ci

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7804933U1 (de) 1978-06-01 Dsi-Sportartikel Gmbh, 8961 Weitnau Längenverstellbarer Skistock
FR1190227A (fr) * 1958-01-17 1959-10-09 Dispositif de blocage d'un élément cylindrique dans un tube extérieur
NL8304242A (nl) * 1983-12-08 1985-07-01 Tno Samenstel van in- en uitschuifbare en met elkaar vergrendelbare buizen, in het bijzonder bestemd voor een blindenstok.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8530227U1 (de) * 1984-11-14 1985-12-05 Fehlbaum & Co., Dornach Dreh- und höhenverstellbarer Einsäulen-Präsentierständer
EP0314357A2 (fr) * 1987-10-21 1989-05-03 Steccone Products Company, Inc. Dispositif de fixation intérieure pour barres tubulaires
DE202005016155U1 (de) * 2005-10-14 2005-12-29 Marchhart Ges.M.B.H. Vorrichtung zum aneinander Fixieren und Lösen von ineinander teleskopierten Profilen
WO2014046554A1 (fr) * 2012-09-21 2014-03-27 Jason Paul Rogers Améliorations d'éléments télescopiques et relatives à ceux-ci

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106308051A (zh) * 2016-09-26 2017-01-11 宁波汇五洲智能科技有限公司 一种单电机三管式可升降办公桌
US11519293B2 (en) 2019-10-11 2022-12-06 Rolls-Royce Plc Cleaning system and a method of cleaning
US12025015B2 (en) 2019-10-11 2024-07-02 Rolls-Royce Plc Cleaning system and a method of cleaning
WO2023070536A1 (fr) * 2021-10-28 2023-05-04 中山市科曼摄影器材有限公司 Tige télescopique
WO2023246769A1 (fr) * 2022-06-22 2023-12-28 际诺思股份公司 Mécanisme de liaison et tête de lit réglable

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