• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PCT No. PCT/NO85/00034 Sec. 371 Date Feb. 18, 1986 Sec. 102(e) Date Feb. 18, 1986 PCT Filed Jun. 14, 1985 PCT Pub. No. WO86/00205 PCT Pub. Date Jan. 16, 1986.A spindle for working chairs having an adjustable height comprises an inner tube (1) which is slidably inserted in an outer tube (3) and extends therefrom and is adapted to transmit the load from the chair seat to the outer tube. The inner tube (1, 1', 1'') is lockable in a plurality of positions relative to the outer tube. The load is transmitted from the inner to the outer tube through a threaded spindle (10, 10', 10'') which is coaxial with the tubes and is rotatably mounted in the outer tube (3), and the threads of which engage a nut (8) which is stationary with respect to the inner tube. The threaded connection formed between the nut and the spindle has a pitch which is sufficiently large for the connection not be self-locking when the nut (8) is moved axially, but still sufficiently small to allow a substantial part of the axial load to be transfered to the threaded spindle (10, 10', 10''). A releasable locking member (18, 18', 18a, 18b) preventing rotation of the threaded spindle (10, 10', 10'') relative to the outer tube is provided for locking the telescopic device. The threaded connection is used to provide a spring operated adjustment of the length. For this purpose the outer tube (3) is non-rotatably secured with respect to the inner tube (1, 1', 1''), and a spiral spring (21), i.e. a spring similar to a watch spring, is provided for acting between the outer tube (3) and the spindle (10, 10', 10'') for rotation thereof in a direction corresponding to a raising of the seat of the chair.
    公开号:SU1477234A3
    申请号:SU864027040
    申请日:1986-02-17
    公开日:1989-04-30
    发明作者:Гуннар Вернер Пер
    申请人:Пер Гуннар Вернер (N0)；
    IPC主号:
    专利说明:

    one
    The invention relates to supporting adjustable telescopic devices for use mainly in spindles of adjustable-height work chairs, in which the weight of the user, combined with the weight of the seat and the back of the chair, creates a load on the internal element of the device, as well as adjustable table legs, sliding supports, fixtures for agricultural machines, etc. and, moreover, in all cases if it is necessary to adjust the height or length.
    The purpose of the invention is to improve ease of operation due to semi-automatic height adjustment of the seat.
    Figure 1 shows the support leg, longitudinal section; Fig. 2 shows a part of the support post, a longitudinal section, an example of the embodiment; figa3 - part of the stand in the zone of the joint between the grooves of the spindle and the locking element, longitudinal section; figure 4 - part of the rack when performing the locking element composite, longitudinal section.
    The support leg, preferably for a height-adjustable seat, consists of two concentrically arranged tubes. The inner tube 1 is mounted vertically with the possibility of sliding in the sleeve 2 relative to the outer tube 3. The conically beveled end part 4 of the inner tube 1
    protrudes from the upper end of the outer tube 3 for mounting the seat on it by means of fastening either directly or through a tilting device. At the lower end, the stand is enclosed by an outer casing 5, having a conical part 6, inserted into the frame 7 of the chair.
    The weight of the seat of the chair and the person sitting on it is transmitted through the inner tube 1 to the intermediate element-nut 8, which is fixed to the inner tube 1 by means of a pin 9.
    5 The load is transmitted through the inner threaded surface of the intermediate element 8 to the threaded surface of the spindle 10 and then through the axial ball bearing 11 to the lower
    0 the end of the outer pipe 3, flanged. Above this level on the outer pipe 3, the flange 12 is reinforced, and the load is transferred from the outer pipe 3 to the inner flange 13 in.
    5 housing 5 through the flange 12, the spring 14 and the anti-friction elements 15 and 16.
    The pitch of the screw thread on the spindle 0 Yu is made sufficiently large to prevent self-locking of the threaded joint when the intermediate element 8 moves in the axial direction. This allows you to adjust the reference
    35
    the rack when moving the intermediate element 8 in the axial direction due to the rotation of the spindle 10.
    To do this, in order to lock the support post, it is necessary to eliminate the rotation of the spindle 10 relative to the inner pipe 1. This is accomplished with the help of a nut-like locking element 17, which engages with the threaded surface of the spindle 10 and is displaced relative to the intermediate element 8 by means of springs 18. The relative rotation of the intermediate element 8 and the locking element 17 is eliminated due to the fact that the line of intersection of the plane, perpendicular to the longitudinal axis of the rack, and guide surfaces The interstitial and locking elements are, for example, a rectangle. The spring 18, pressing the inner threaded surface of the locking element 17, engages it with the upper sides or ends of the threaded surface of the spindle 10, providing a force of friction against these ends sufficiently to prevent the spindle 10 from rotating.
    The inner threaded surface of the locking element 17 allows it to move in the axial direction against the action of the spring 18 in order to eliminate the braking or locking action. This freeing movement is carried out manually by means of a lever (not shown) mounted on the seat reinforcement and acting on the pressure element 19, which actuates the locking element 17 by means of a long pipe 20. After that, the seat and the inner pipe 1 can be raised or lowered manually at the same time overcoming the force of friction in a threaded joint.
    The proposed support column is characterized in that it is intended for use with a mechanical spring that provides semi-automatic adjustment of the device. Such a spring is schematically indicated by position 21. When using a spring for semi-automatic adjustment, it is necessary that the inner 1 and outer 3 pipes be fixed without rotation relative to each other, for which the pin 9 securing the intermediate element 8 to the inner pipe 1 passes through the slit 22 in the outer tube 3, keeping them from rotating relative to the outer tube 3 and thus providing the possibility of moving them integrally in the axial direction relative to the outer tube 3 for some distance, respectively the length of the slit 22. The spring 21 is preferably a thin ribbon spiral spring, the outer end of which is connected to the outer pipe 3 and the inner end to the spindle 10. You can construct the spring 21 so that it can break the spindle 10 and lift the inner pipe D and the seat of the chair (not shown), if the latter is not loaded or loaded only by a small force. If the load is greater, for example, due to the weight of the person sitting on the seat, the intermediate element 8 moves downwards and the spindle 10 rotates in the opposite direction, pulling the spring 21,
    The rack shown in Fig. 2 differs from the rack in Fig. 1 only by the engagement of the nut-like locking element 17 and the spindle 10. The best locking action can be obtained if the angle formed by the engaging surfaces with the spindle axis is relatively small. The upper ends of the threads on the spindle 10 may have a slightly tapered portion 23 of the helical thread. Accordingly, the locking element i17 has an internal thread 24, the shape of which is matched with the conical part 23 of the spindle 10. Thus, these thread windings should not even enter the grooves of the thread on the spindle and engage the threaded part 25. Instead, the threaded parts interacting with 23, may simply be the protrusions of the screw thread in the locking member 17.
    The casing 5 can be terminated at the upper end by the guide sleeve 26, which also forms a bearing for the upper end of the outer tube 3. An additional outer flange 27 can be attached to the outer tube 3 and engages with the lower side of the guide sleeve 26 if r 14 is not compressed. The flange 27 partly prevents the support leg from jumping out of the casing 5 when raising the seat, and also partially creates
    friction between the flange 27 and the bottom side of the guide sleeve 26, which prevents rotation of the seat relative to the support, when there is no load on the seat. Thus, the seat does not rotate when a person rises from it.
    In the rack according to FIG. 3, the purpose of the inner pipe 1, the spindle 10, the intermediate element 8, the pin 9, the locking element 17, the coil spring 18 and the long pipe 20 and their interaction are the same as in the variants of figures 1 and 2.
    . In accordance with FIG. 3, the locking element 17 has a double internal thread 28, the protrusions of which are provided with longitudinal grooves 29 which can engage with the corresponding yuzhimi grooves 30 in the projections of the internal threads 31 on the spindle 10, while the threads 31 also have double cutting. The spring 18 presses the locking element 17 up, the drive grooves 29 and 30 in mutual engagement. If the grooves 29 have a hardened surface, they can also be engaged in locking with the relationship between the pitch and the number of grooves for each revolution.
    In the rack according to FIG. 3, in order to obtain a soft engagement with a frictional braking effect during the rapid rotation of the spindle 10, it is possible to use the variant shown in FIG. 4, according to which the locking element 17 is made of an integral part of the engaging element 32 and the friction clutch 33 Similarly to the locking element 17, the friction clutch 33 cannot rotate relative to the intermediate element 8, which is achieved due to the fact that the clutch is provided with a window 34 whose width corresponds to the diameter of the pin 9. The friction clutch 33 has a conical This friction surface 35, which interacts with the corresponding friction surface 36 on the engagement element 32.
    When the friction clutch 33 and the engagement element 32 are in their; lower positions in engagement with the intermediate element 8, the spindle 10 can rotate quickly depending on
    blunt thread turns 31 by depressing the force applied to spindle into these protrusions even in the absence of grooves 30. The protrusions of the screw thread in the locking element 17, as well as on the spindle 10, form a small angle with the spindle axis. This facilitates the movement of the locking element 17 for engagement and for disengaging the spindle 10. To completely release such an engagement, it is necessary to move the locking element 17 in the axial direction to a position where the turns of the thread 28 move from the turns of the thread 31 or the grooves 29 and thirty .
    they have a gap between them, which is ensured by the coupling 33, which stops abruptly, is angled between the ridge of the screw thread and the spindle axis and the depth of the grooves. The pin 9 in this belief of execution only engages with the inner pipe 1, while the outer pipe 3 can non-rotate in the axial direction relative to the inner pipe 1 by other means (not shown). When using conjugated grooves 29 and 30, adjusting the length or height of the support column cannot be infinitely variable; it must be carried out stepwise in sol, either by action of the spring 21, or by the action of an axial force transmitted through an intermediate one. element 8. Under the action of the releasing force from the pressure element 19 through the long pipe 20, the engagement element 32 together with the grooves 29 engages with the grooves 30 on the spindle 10. However, it does not engage with the friction clutch 33, and only slightly presses the compression spring 18 therefore, the engagement member can rotate. If the vertical movement of the friction
    The engagement moment 32 is braked due to friction against the surface 34. The effect is similar to that achieved with the help of the ring F ° connection in the gearbox. The advantage of such a stand compared with the variant shown in FIG. 2, in which the engagement of the locking element 17 and the spindle 10 is a frictional engagement, rather than a gear or striated one, is due to the fact that the friction force acts on the larger lever arm. . Moreover, on the friction surfaces,
    7
    which separate the screw threads, it is easy to apply a suitable friction coating.
    When used in other assemblies other than seat spindles, the rack design is not limited to options in which telescopic tubes have a circular cross-section, you can also use polygonal sections and, moreover, in combination with telescopic devices having more than two telescopic tubes, and various other locking options. For example, the spindle 10 may have intersecting cutting, i.e. it may have two cuts in the opposite direction, with the intermediate element (nut 8) and the locking element 17 meshing with one of the threads. When the inner tube 1 is moved in the axial direction, the locking element 17 rotates at a faster speed than the spindle, and the locking can then be obtained by creating a friction connection or other locking engagement of the locking element and the nut 8.
    权利要求:
    Claims (6)
    [1]
    1. The support leg is preferably for a height-adjustable seat, containing two concentrically mounted tubes, one of which is internal, has means for connecting to the seat and is installed with the possibility of reciprocating movement and locking in many positions relative to the outer tube, placed in the inner tube rotatably with respect to the outer tube, the spindle with the threaded outer surface, the intermediate element interposed between the inner tube and the spindle 45 acting on its internal surface with the threaded surface of the spindle when transferring an axial load from, the seat to the spindle attached to the internal pipe and connected to the external pipe with fixation against rotation, and the locking element, in order to increase, -, - easy operation due to semi-automatic adjustment
    ten
    r t
    15
    35
    -to n, w, -, -
    4772348
    seat height, the locking element has an internal threaded surface that interacts with the threaded surface of the spindle, is located above the intermediate element transmitting the load, is spring-loaded relative to it and mounted relative to the inner pipe with rotation fixation and axially opposite to the spring action to relieve the braking or locking action , at the same time threaded surfaces are made in increments that exclude self-locking.
    [2]
    2. The rack according to claim 1, distinguished by the fact that the protruding portions of the threaded surface of the spindle have conical portions interacting with the ridges of the inner threaded surface of the locking element.
    [3]
    3. The rack according to claims 1 and 2, which is designed so that the protruding parts of the threaded surface of the spindle or the locking element have longitudinal grooves to increase the engagement force.
    [4]
     4. Rack on PP. 1 and 2, characterized in that the protruding parts of the threaded surface of the spindle are made conical, facing a large base towards the seat, with grooves interacting with grooves on the inner threaded surface of the locking element.
    20
    25
    thirty
    [5]
    5. A rack according to claims 1-4, characterized in that the interacting threaded surfaces of the spindle
    and the locking element has a two-way thread.
    [6]
    6.Stayka PP.1-5, about tl and h and y and with the fact that the locking element is made of an integral element of engagement with longitudinal grooves and with a conical outer surface and a coupling with an internal conical surface, frictionally interacting with conical the outer surface of the engagement element.
    Priority points:
    06.18.84 pp. 1,2,4,5
    03/29/85 to item 3
    and
    fig I
    Fig
    20
    Fig.Z
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1477234A3|1989-04-30|Support post ,particularly, for adjustable-height seat
    US3741514A|1973-06-26|Quick adjustable height support
    US5292095A|1994-03-08|Levelling device, particularly for furniture
    US7412931B2|2008-08-19|Quick crank adjustable height table
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    US5243921A|1993-09-14|Adjustable table base
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    US4922836A|1990-05-08|Lead screw support mechanism for an overbed table
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    GB2045069A|1980-10-29|Child's amusement seat
    DE4034633A1|1992-05-07|GAS SPRING FOR HEIGHT ADJUSTMENT
    FI86028B|1992-03-31|HOEJDREGLERANORDNING.
    CA1305400C|1992-07-21|Device for vertical adjustment of arm supports on chairs, especially wheel chairs
    US3502358A|1970-03-24|Adjustable post assembly
    US5136742A|1992-08-11|Nursing home bed tilt apparatus
    US3797052A|1974-03-19|Trendelenberg mechanism
    US2742082A|1956-04-17|Height-adjustable stools
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    EP1080665A1|2001-03-07|Adjustable telescopic structure
    WO2000011254A2|2000-03-02|Device for bearing and moving objects
    CH303985A|1954-12-31|Armchair with adjustable seat height.
    CN213430015U|2021-06-15|Multi-directional regulation and control support
    DE19840854A1|2000-03-09|Holding and standing aid for handicapped person comprises stand tube in which fits height-adjustable telescopic support with beam arm rotatably and fixably located on stand tube
    同族专利:
    公开号 | 公开日
    CA1235645A|1988-04-26|
    AU566841B2|1987-10-29|
    JPH0734774B2|1995-04-19|
    WO1986000205A1|1986-01-16|
    DE3584764D1|1992-01-09|
    EP0185726B1|1991-11-27|
    NO168623C|1992-03-18|
    JPS61502449A|1986-10-30|
    AU4432685A|1986-01-24|
    EP0185726A1|1986-07-02|
    US4860987A|1989-08-29|
    NO860615L|1986-02-18|
    NO168623B|1991-12-09|
    AT69705T|1991-12-15|
    BR8506783A|1986-11-25|
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    US8540519B1|2010-10-21|2013-09-24|James Lauter|Seated balancing device|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NO842441A|NO842441L|1984-06-18|1984-06-18|ADJUSTABLE TELESCOPE DEVICE.|
    NO851295|1985-03-29|
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