CN1714706A - Adjustable device with limitting function of torque and loosing prevention - Google Patents

Abstract

The adjustable chair has locking mechanism capable of limiting torsion moment and locking. The chair includes chair tray, chair board, rotatable fastener and two ring parts. The chair tray and the chair board have holes for accepting fastener, and the fastener includes ring handle and inserted screw. When the chair board is held between the chair tray and the fastener, the inserted screw is matched with the chair tray via the hole in the chair tray. During rotation and after the resistance becomes greater than certain amount, the ring handle will slide relatively to the inserted screw to avoid torsion moment applied to the inserted screw. Of the ring parts, one rotates together with the fastener via key while the other maintains no rotation with the key. The first ring part is one raw of cantilever teeth with one first surface with smaller horizontal angle and the second surface with greater horizontal angle each, resulting in torsion moment for screwing in the fastener smaller than that for screwing off.

Description

Adjustable apparatus with torque limiting and loosing prevention function

The application is that application number is 10/077,313, the applying date is on February 15th, 2002, name is called the application that continues of the application of " barbed chair that has locking device ", also be that application number is 09/881,896, the applying date is June 15 calendar year 2001, name is called the application that continues of the application of " locking device that is used for the seat level(l)ing device ", and with same pending application number be 10/077,409, name is called " improved Ergonomic chair ", the applying date is that the application on February 15th, 2002 is relevant, and the content disclosed in it all merges as reference at this.

Technical field

The present invention relates to a kind of adjustable apparatus, particularly a kind of adjustable apparatus that is applicable to that office seating is regulated, it comprises torque limiting and loosing prevention function, low price and simple in structure.

Background technology

Barbed chair belongs to known technology, as at United States Patent (USP) 5,755, and disclosed office chair in 488,5,765,804 and 5,971,484.Yet this chair is very expensive, and is too complicated, and unreliable sometimes.Usually, this class chair has the adjustable seat and/or the chair back, and keeps the position that regulates by frictional fit.Yet these devices are generally unreliable, expensive or be difficult to operation, perhaps, have number of drawbacks simultaneously.

Summary of the invention

The present invention has overcome the existing problem of previous equipment.Described herein is an adjusting device that is used for two correlated activation parts lockings and release, and this device comprises: the securing member with key elements; First structure, its have with securing member on the key elements of key elements complementation; Second structure, but its have with two relative moving parts in one on the key that cooperates of complementary key elements, be used to stop second structure to be moved, first structure and second structure have can make they first direction with the first torque level relative motion and on second direction with the element of the second bigger torque level relative motion.

The existing relevant device of many advantages, characteristics and the purpose that the present invention possesses or not.For example, advantage is to the invention provides simple in structure and operate easy horizontal adjustable seat support.Another object of the present invention provides a kind of reliable chair with adjustable.Another characteristics of the present invention provide a kind of simple seat adjuster that is easy to produce and assemble.

The present invention is more completely understood and other target, and advantage and characteristics will obtain in conjunction with the description to most preferred embodiment by the accompanying drawing that provides below, and what most preferred embodiment was represented is example of the present invention.

Description of drawings

Fig. 1 is the stereogram of office seating when observing from the front.

Fig. 2 is the chair dish that uses from seat shown in the right front upward view 1, the three-dimensional exploded view of chair plate and securing member.

Fig. 3 overlooks chair dish, the three-dimensional exploded view of chair plate and securing member from the right front.

Fig. 4 is the three-dimensional exploded view of described securing member, and its each several part is shown: threaded insert and cupped hand.

Fig. 5 is the stereogram that is similar to Fig. 4 of the securing member that assembles.

Fig. 6 is the rear perspective view of threaded insert.

Fig. 7 is the chair dish, the chair plate, and securing member and two are used for preventing the top perspective view of the ring of securing member accidental.

Fig. 8 is that the part of element shown in Figure 7 is looked up three-dimensional exploded view.

Fig. 9 is the screw thread insert and the top perspective exploded view of two rings up and down.

Figure 10 is the three-dimensional exploded view of looking up of screw thread insert and two rings.

The specific embodiment

Though the structure that the invention discloses multiple variation and can select, what describe in detail here is the shown most preferred embodiment of each accompanying drawing.Yet, should be appreciated that its purpose is not that the present invention is confined among this particular form or the embodiment disclosed here.On the contrary, all meet the modification of the spirit and scope of explaining in the accessory claim of the present invention, and identical structure and method, and optional structure all belong to the category that the present invention covers.

At first consulting Fig. 1, is office seating 10 among the figure, and it is by backrest module 20, and 30, two armrest assemblies 40 of cushion assembly and bearing 50 are formed.Here in detail cushion assembly 30 is introduced.As below will explain that cushion can the level adjusting, easy operating is simple in structure, makes easily and assembles, and very reliable.

Referring to Fig. 2 and Fig. 3, describe part cushion assembly in detail and can regulate locking device 300, Fig. 2 looks up three-dimensional exploded view before being, and Fig. 3 is preceding top perspective exploded view.Part cushion assembly and can regulate locking device and comprise chair dish 301, chair plate 302 and securing member 303.

The chair dish can be made by any suitable material, such as synthetic resin, and can be molded in aggregates.The chair dish comprises top 304 and bottom 305.Described top covers a cushion, as shown in Figure 1, and the seat surface of formation seat 10.The chair dish also comprises: the L shaped engagement finger piece of four spaced apart that form on described bottom, 306,307,308,309; Securing member receiving element 310, it is a beam that has the hole that is formed by wheel rim 311; Two rest element 312,313.This rest element is used to limit the chair dish and moves relative to the chair plate level, breaks away from partial dish and the partial plate that prevents to assemble.The chair dish also comprises front portion 314 and rear portion 315.

There is a big hole 316 at the rear portion of chair dish.Fastener hole all around as 317, is used for chair cushion is fixed on the chair dish.The chair dish also comprises one group of ribs, as superposed rib 318.The side of the opening wheel rim 311 of beam has two against projection 319,320.The opening wheel rim 311 of beam and two projections 319,320 are positioned on the securing member receiving element.Because the material of chair dish is a synthetic resin, the wheel rim that receives the beam of securing member has elasticity, can deform with respect to the power that applies like this.This power may be from chair plate 311 and the contact of the projection 319,320 that is positioned at the chair dish when adjusting seat.Rest element 312,313 also lays respectively at the end of girder construction 322,323 separately, and to provide elasticity when assembling, the back can be further described.

Continue to consult Fig. 2 and Fig. 3, the chair plate can be made of any suitable sturdy material, such as aluminium.The same with the chair dish of synthetic resin, the chair plate can be made integral body.The chair plate comprises front portion 324, rear portion 325, top 326 and bottom 327.The chair plate comprises 4 gathering sills 328,329,330,331, and each groove all has the head bore of expansion, for example head bore 328a; And a narrow main hole, for example main hole 328b.The L shaped engagement finger piece 306,307,308,309 of gathering sill and chair dish is used, to limit and to guide the chair dish to seesaw in the horizontal direction with respect to the chair plate of horizontal fixed.

The chair plate also comprises the slotted hole 332 and two the motion limiting grooves 333,334 that receive securing member.These grooves by restriction rest element 312,313 its separately the motion in the groove limit the horizontal movement of chair dish.A macropore 335 is arranged at the rear portion of chair plate.All there is a cover to be positioned at the recess 336,337 at top 326 on each limit of the slotted hole 332 that receives securing member.As below illustrating, every suit recess forms retainer in the chair tray bottom projection corresponding with.Because projection is the part of cantilevered securing member receiving element 310, when the chair dish was regulated with respect to the chair plate, projection moved to another to being with cam driven from a pair of recess.

Motion limiting groove 333,334 cooperates with rest element 312,313 respectively, and the motion of restriction chair dish, can not break away from gathering sill after finishing installation to guarantee L shaped finger piece.Because rest element is formed on the cantilever beam 322,323, when L shaped finger piece was inserted into gathering sill for the first time, the chair dish can push the chair plate, at this moment the rest element cam driven.When L shaped finger piece left the head bore that enlarges separately, rest element can be fastened in the motion limiting groove 333,334.Interference engagement between the wall around rest element and the motion limiting groove prevents that L shaped finger piece from getting back to the head bore place of expansion and break away from from gathering sill.The manufacturing and the assembling that are appreciated that chair dish and chair plate are all very simple.

By Fig. 4,5 and 6 can further understand described seat-assembly and the simplifications that can regulate locking device, in these figure detail display securing member 303.Securing member 303 can torque limiting, and it comprises two parts, threaded insert 338 and cupped hand 339.Cupped hand comprises outer surface 340, and this surface has many grooves and convex ridge, so that the user holds and carry out rotating operation; Cupped hand also comprises an annular flange surface 341, and it has many projections, as projection 342.Usually have one with respect to the rectangular annular surface 343 of ledge surface, it has some clampings 344.Threaded insert 338 comprises screw thread 345, the deflection tooth 346 of extension, and annular flange 347, install or cantilevered one group of inclination dentation parts along cyclic spring are as dentation parts 348,349,350,351,352,353.As an example, can be clear that inclined teeth 354 and 355 is on dentation parts 348.

Threaded insert and cupped hand can be made an integral body with synthetic resin respectively.Threaded insert and cupped hand also can be by being inserted into the annular surface 343 of cupped hand with threaded annular wheel rim 347, the assembling easily so that pass outstanding clamping 344.During by clamping, annular surface can outwards protrude or distortion at annular wheel rim.After annular wheel rim passes through fully, the annular surface original state of rebounding, and between clamping head and annular wheel rim, produce interference engagement.After cupped hand and threaded insert were connected to one, threaded insert can rotate by cupped hand.

In assembling process, securing member passes on the chair plate 302 slotted hole 332 that receives securing member, and cooperates with the wheel rim 311 of securing member receiving element 310 on the chair dish 301.When threaded insert cooperates with wheel rim 311, the deflection tooth 346 on the threaded insert can deform and pass the hole of securing member receiving element 310.By this way, though attempt securing member 303 rotated in the opposite direction so that its when breaking away from chair dish, securing member still can remain on the chair dish.

When securing member was rotated by clockwise direction, the cooperation of chair dish and chair plate was more firm, and all horizontal movements between chair dish and chair plate are formed friction and mechanical resistance.Like this, just having formed locking cooperates.In addition, after reaching predetermined moment of torsion, screw cupped hand the more relative a plurality of projections 342 of elasticity dentation parts row that install and that tilt are slided, cupped hand can rotate freely with respect to threaded insert like this, and does not have more moment of torsion to be applied on the threaded insert.

When operation, what the formation of chair dish, chair plate and securing member was all used is known technology.Assembling is easily simple.The arrangement of chair dish and chair plate allows L shaped finger piece by being positioned at the expanded hole of gathering sill end, and rest element is placed in the motion limiting groove then.Subsequently, threaded insert and cupped hand are pressed together and form single securing member unit, and this securing member is screwed into the securing member receiver hole place on the chair dish then, and with the chair plate holder in the middle of them.After working good, chair dish and securing member just can not break away from again; Yet, can be by clockwise or be rotated counterclockwise cupped hand and securing member is carried out simple degree of tightness regulate.When securing member was loosening, the chair dish can carry out horizontal direction with respect to the chair plate to be regulated to satisfy seat user's comfort.Because the existence of projection and recess, the formation of retainer are heard by the user of chair easily and are felt, therefore help adjustment process.After finishing adjusting, the opposite spin securing member, chair dish and chair plate are compacted.Can damage securing member, chair plate or chair plate when not worrying screwing securing member, because when reaching predetermined resistance, the cantilevered inclined teeth can be slided on a plurality of projections, thereby makes the relative threaded insert of cupped hand that " slide fastener " take place.

Consult Fig. 7 and Fig. 8 now, among the figure detail display another specific embodiment of adjusting device 400.Content class among Fig. 7 and Fig. 3 seemingly, but around vertical axis to right rotation about 90 the degree.Content class among Fig. 8 and Fig. 2 seemingly, but around vertical axis to anticlockwise 90 the degree.There is shown the part seat assemblies, comprise chair dish 402 and chair plate 404.Also show adjusting device 400, it comprises cupped hand 408, threaded insert 410, the first rings 412 and second ring 414.The structure of cupped hand is identical with the cupped hand 339 that the front is described in Fig. 4.Threaded insert 410 is very similar to the threaded insert 338 that the front is described in Fig. 4, but slightly changes.

Consult Fig. 9 and Figure 10 now, threaded insert comprises the threaded portion 420 of the deflection tooth 422 that has extension, annular wheel rim 424, and one group of tooth components of elasticity installation or cantilever is as parts 426.As previously described, the cantilever tooth components allows threaded insert relative to cupped hand " slip " or move, and has fixing tooth on the cupped hand, so that the restricted passage cupped hand is added in the torque on the threaded insert.In addition, threaded insert comprises the groove 428,430 that two opposition are arranged, the back will be described as key elements.

The loosing prevention function of adjusting device realizes by first ring 412 and second annulation 414.First ring 412 is circulus normally, and it comprises two key elements 432 and 434, key elements 428,430 complementations of they and threaded insert.432,434 are contained in groove 428,430 respectively.Each ring comprises bottom surface 431 and end face 433.First ring also comprises one group of tooth components 436,438,440,442,444,446 that cantilever or elasticity are installed, their tooth 448,450,452,454, and 456,458 extend upward, and its direction is opposite with the tooth components of threaded insert.The cantilever tooth comprises two inclined-planes, as the surface on the tooth 448 460 and 462, can see, first inclined-plane 460 is with respect to about 30 degree of top end surface 433 inclinations as reference plane.But second inclined-plane 462 is set to the position with respect to about 60 degree of reference plane.Extend one group of pad 470,472,474,476,478,480 from the bottom surface 431 of first ring, when adjusting device assembled, this group pad and annular wheel rim 424 leant.

Pad provides preset space length between the annular wheel rim 424 of the bottom surface of first ring 412 and threaded insert 410.This makes that cantilever tooth components in a row can be downwards towards annular wheel rim 424 bendings, as below will introducing when operation.First ring 412 also comprises wheel rim, and this wheel rim has isolated recess 482,484,486,488, to hold the clamping 344 on the cupped hand.

Second ring 414 comprises the fixed teeth 503 that upper surface 500 and lower surface 502, one covers extend out from lower surface, as tooth 504, and from the upwardly extending key elements 506 of upper surface.This key elements is an arc-shaped protrusions, is contained in the slotted hole 332 of the reception securing member on the plate of chair shown in Fig. 2 302.This securing member receiver hole is the complementary key elements of the key elements on second ring.When second ring was inserted in the slotted hole 332 that receives securing member, second ring just can't rotate freely.Yet when the user of seat rotated cupped hand in adjusting seat process, first ring-shaped article 412 was typed in the threaded insert, and this threaded insert is by the cupped hand driven rotary subsequently.

Be appreciated that when cupped hand/threaded insert in the counterclockwise direction, i.e. arrow 510 directions rotation as shown in Figure 9 is when screwing securing member, the tooth of first ring 412 (as tooth 448) is also driven with tooth 503 engagements of second ring 414.Because it is the angle of first inclined surface 460 of tooth is less, crooked or to drive the required power of described cantilever tooth also less relatively.This rotation and bending occur in adjusting device and are in when locking, so that produce frictional fit between chair dish and chair plate.When the moment of torsion that applies on threaded insert reaches the preestablished limit value, cupped hand can be slided, and prevents that first ring of threaded insert or key entry is further rotated motion.

As vibration or there is similar trend to make first ring of cupped hand, threaded insert and key entry clockwise direction rotation occur, and when frictional fit between chair plate and chair dish was fluffed, the loosing prevention function was had an effect immediately.As now understandable, the cantilever tooth of first ring cooperates with the fixed teeth of second ring along second inclined-plane 462, and described second inclined-plane 462 is with respect to the bigger angle of reference planes inclination.Therefore, make securing member become flexible required power, promptly crooked or rotate the power of the tooth parts on first ring when arrow 510 moves in the other direction, be greater than and screw the required power of securing member at first.Required strength is bigger in fact, and is the function of ratio between the oblique angle on first inclined-plane and the oblique angle, second inclined-plane.This causes, and securing member is more difficult to fluff, so that can prevent usually.

Above-mentioned description detailed the preferred embodiments of the present invention.Other example, embodiment, modification and change all belong to the desired protection domain of claims.For example, all to can be considered be in equivalent configurations and the character express scope that drops into claim for dissimilar materials, the chair dish of different size and shape and chair plate and difform securing member.Equally, adjusting device also is applicable to and regulates backrest or other correlated activation parts in vertical direction.Preferably some new technologies also can be as the selection of equivalent as other.Here do not wish not plan to limit in any way the application of parity price principle yet, or the category of restriction peace treaty speed invention.

Claims (18)

1. be used for but two relative moving parts are locked adjusting device with release, comprise:

The securing member that has key elements;

First structure, it has the key elements with the described key elements complementation of described securing member; And

Second structure, it has a key elements, but this key elements be suitable for described two relative moving parts in one on complementary key elements cooperate, to prevent that described second structure is moved, described first structure and second structure comprise that described first structure of permission and described second structure are at the element that relatively moves and relatively move with the second bigger torque level with first torque level on the first direction on second direction.

2. device as claimed in claim 1 is characterized in that:

Described first structure is first ring, and described second structure is second ring.

3. device as claimed in claim 2 is characterized in that:

Described second ring comprises row's fixed teeth; And,

Described first ring comprises tooth parts at least one elasticity installation, that tilt.

4. device as claimed in claim 3 is characterized in that:

The described tooth parts of described first ring have two inclined-planes, be used for cooperating with the described tooth of described second ring, the angle of inclination on relative reference plane, first inclined-plane is less, the angle of inclination of the described relatively reference planes in second inclined-plane is bigger, and needed force rate wants big when wherein moving the described tooth of described first ring on described second plane on described first plane.

5. device as claimed in claim 4 is characterized in that:

Described first ring comprises pad, is used to make described first ring and described securing member to keep preset distance.

6. device as claimed in claim 1 comprises:

The torque limited structure that is connected with described securing member.

7. device as claimed in claim 6 is characterized in that:

Described torque limited structure comprises cupped hand and threaded insert, and the structure of described cupped hand and described threaded insert makes them apply under the moment of torsion of predeterminated level and can relatively move.

8. device as claimed in claim 7 is characterized in that:

Described threaded insert comprises the cantilever tooth, and described cupped hand comprises the fixed teeth that matches.

9. device as claimed in claim 6 is characterized in that:

Described first structure is first ring, and described second structure is second ring.

10. device as claimed in claim 9 is characterized in that:

Described second ring comprises row's fixed teeth; And

Described first ring comprises tooth parts at least one elasticity installation, that tilt.

11. device as claimed in claim 10 is characterized in that:

The described tooth parts of described first ring have two inclined-planes, be used for cooperating with the described tooth of described second ring, first inclined-plane is less with respect to the angle of inclination of reference planes, second inclined-plane is bigger with respect to the angle of inclination of described reference planes, wherein wants big in the needed force rate of described tooth that moves described first ring on described second clinoplain on described first plane.

12. one kind is used for the chair plate locking of the chair dish of seat and seat and the adjusting device of release, described device can torque limiting, and it comprises:

The securing member that has key elements;

First ring, it has the key elements with the described key elements complementation of described securing member; And,

Second ring, it has one and is suitable for the key elements that cooperates with complementary key elements on the described chair plate, rotates to prevent described second ring; Described first ring and second ring comprise the element that allows described first and second rings to relatively rotate and relatively rotate with the second bigger torque level in the opposite direction with first torque level on first direction.

13. device as claimed in claim 12 comprises:

Pad on described first ring.

14. device as claimed in claim 12 is characterized in that:

Described second ring comprises row's fixed teeth, and described first ring comprises tooth parts at least one elasticity installation, that tilt.

15. device as claimed in claim 14 comprises:

The torque limited structure that is connected with described securing member.

16. device as claimed in claim 15 is characterized in that:

Described torque limited structure comprises cupped hand and threaded insert, the structure of described cupped hand and described threaded insert make they apply under the moment of torsion of predeterminated level take place relative mobile.

17. device as claimed in claim 15 is characterized in that:

Described threaded insert comprises the cantilever tooth, and described cupped hand comprises the fixed teeth that matches.

18. device as claimed in claim 17 is characterized in that:

Described first ring comprises the cantilever tooth.

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