CN2669717Y

CN2669717Y - Waist rest of chair with suspending beam structure

Info

Publication number: CN2669717Y
Application number: CNU200320114364XU
Authority: CN
Inventors: 吴长钰
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-15
Filing date: 2003-12-15
Publication date: 2005-01-12
Anticipated expiration: 2013-12-15

Abstract

The utility model relates to a waist rest of a chair with suspending beam structure, used for being arranged in the seat back to adjust the upwardly arched height of the seat back, comprising an arched board assembly, a supporting assembly, and a bed frame assembly. The arched board assembly comprises a rotary suspending beam and an assistant board connecting with the suspending beam. The tail end of the assistant board can horizontally move along the bed frame assembly. The supporting assembly comprises supporting arms and a control mechanism. The supporting arms are supported on the middle part of the suspending beam. When the control mechanism moves, the supporting arms are driven to move, which leads the suspending beam to rotate, the tail end of the assistant board is driven to move horizontally, and accordingly, the upwardly arched height adjustment for the arched board assembly is realized.

Description

A kind of Seat lumbar with cantilever beam structures

One, technical field

The utility model is a kind of parts in the seat, especially a kind of waist picking-up mechanism that is installed in backrest inside, has cantilever beam structures.

Two, background technology

The waist holder is a kind of parts in the seat, it is installed on the backrest inside of seat, the occupant can regulate the degree that backrest arches upward by regulating the waist holder, to reach the effect of adjusting sitting posture, slowing down the small of the back fatigue, is specially adapted to automotive seat, train seat, patient's seat or the like.The waist holder now has been used to the part automotive seat.

The existing waist holder that is used for automotive seat generally comprises dome element and flexible axle backguy with favorable elasticity; Dome element one end is fixed, and the steel wire rope of the other end and flexible axle backguy links; When tense wire rope, the height that dome element arches upward just raises; When loosening steel wire rope, the height that dome element arches upward just reduces.The occupant can or loosen steel wire rope and regulate the height that dome element arches upward by tension, and then has regulated the degree that backrest arches upward, to reach the effect of ride comfort.

Above-mentioned technology has following shortcoming:

The first, because dome element one end is fixed, the other end is by the tension of the steel wire rope of flexible axle backguy, and dome element is bigger in the back rigidity that arches upward, and elasticity is relatively poor, and buffering can only rely on the backrest material of seat, therefore having relatively high expectations to the backrest material.

The second, dome element must be made the shape that arches upward in advance, and promptly when the state of not strained by steel wire rope, dome element just has the shape that slightly arches upward, so that when the steel wire rope of tension flexible axle backguy, dome element is successfully arched upward.This makes backrest can't adopt the shape of indent, and riding comfort is had a negative impact.

Three, summary of the invention

The technical problems to be solved in the utility model is that existing waist holder arches upward that the back rigidity is excessive, the problem of poor flexibility, and the dome element of existing waist holder must be made the shape that arches upward in advance and cause backrest can't adopt the problem of concave shape.

The technical solution of the utility model is described below:

The utility model comprises arch sheet assembly, support assembly, pedestal assembly.Arch sheet assembly and support assembly are installed on the pedestal assembly, and the pedestal assembly is installed on the steelframe of backrest.

The arch sheet assembly comprises cantilever beam and accessory plate, and the head end of cantilever beam and the head end of accessory plate link with hinge or other modes; The tail end of cantilever beam and pedestal assembly hinge-coupled; The tail end of accessory plate is supported by the pedestal assembly, and can be with respect to the translation of pedestal assembly.The principle that this arch sheet assembly arches upward is: when cantilever beam during around the rotation of the hinge axis of its tail end, the head end that the head end of cantilever beam will drive accessory plate raises together, and the tail end that drives accessory plate is along the translation of pedestal assembly, thus the shape that formation is arched upward.

Support assembly comprises support arm and controlling organization, and support arm is installed on the pedestal assembly directly or indirectly, and is supporting the middle part of cantilever beam.Support arm and controlling organization have multiple version, and support arm and cantilever beam can be used hinge-coupled, also can not connect.Controlling organization is by people's manual operating or electric control, and its motion will drive the support arm motion.

In use, controlling organization with staff or electric control support assembly, motion along with controlling organization, to drive the support arm motion, and then the drive cantilever beam is around the hinge axis of its tail end, the head end that the head end of cantilever beam will drive accessory plate moves together, and the tail end that drives accessory plate is along the translation of pedestal assembly, thereby forms or regulate the shape that arches upward.

The utility model compared with prior art has following useful effect:

The first, because arch sheet assembly of the present utility model has adopted the version of cantilever beam, and the tail end of the accessory plate that links with cantilever beam is a free shift, and therefore the elasticity of whole waist holder depends primarily on the elasticity of cantilever beam; Can make the waist holder obtain satisfied elasticity by the design to cantilever beam, it is more comfortable that the people is taken; And reduced requirement to the backrest material, be beneficial to and reduce cost.

The second, because arching upward of arch sheet assembly relies on the motion of support arm, cantilever beam and accessory plate do not need to arch upward in advance, can make cantilever beam and accessory plate form the shape of indent in advance by suitable adjusting on the contrary.Thereby make backrest when using waist holder of the present utility model, can adopt the shape of indent, taken more more options of people, riding comfort is further enhanced.

Four, description of drawings

According to the arch sheet assembly can not structure and the different structure of support assembly, the utility model has multiple version.

The schematic diagram of Fig. 1, Fig. 2 embodiment of motoroperated slide block mechanism, cantilever beam and accessory plate usefulness hinge-coupled for support assembly adopts.

Fig. 3, Fig. 3-1, Fig. 3-the 2nd, the local deformation of the embodiment of Fig. 1, its cantilever beam adopts the resilient connection plate to connect with accessory plate.

Fig. 4, Fig. 4 the-the 1st, the local deformation of the embodiment of Fig. 1, the slide block mechanism that its support assembly adopts manual flexible axle backguy to handle.

Fig. 5, Fig. 5-1 is that the controlling organization of support assembly adopts gear and thread transmission, support arm and the cantilever beam schematic diagram of the embodiment of hinge-coupled.

Fig. 6,6-1,6-2 are installed on schematic diagram in the seat for the embodiment with Fig. 5.

Five, the specific embodiment

According to the different structure of arch sheet assembly and the different structure of support assembly, the utility model has multiple version, now is described with reference to the accompanying drawings.

The schematic diagram of Fig. 1, Fig. 2 embodiment of motoroperated slide block mechanism, cantilever beam and accessory plate usefulness hinge-coupled for support assembly adopts.Wherein Fig. 1 is the schematic diagram under the state that do not arch upward, the schematic diagram when Fig. 2 arches upward for the waist holder.

In Fig. 1,

part

1,2 and 3 has constituted the pedestal assembly.Part 1 is a lower carriage, and 2 is upper bracket, and 3 is connecting

plate.Part

1,2 is welded as a whole with part 3 respectively, and also available rivet or bolt combine as a whole.

Part

4,5,6 and connecting hinge have constituted the arch sheet assembly.Part 4 is a cantilever beam, and part 5 is an accessory plate.Cantilever beam 4 has head end 41 and tail end 42, and accessory plate has head end 51 and tail end 52; 41 connect with 51 usefulness hinges 43, cantilever

beam tail end

42 and 44 connections of lower carriage 1 usefulness hinge.The tail end 52 of accessory plate contacts with the end face of upper bracket 2, and relies on the pulling force of part 6 to be pressed in all the time on the end face of upper bracket 2.Part 6 is a return spring, and it is connecting accessory plate 5 and upper bracket 2.

Part 7---12 have constituted support assembly.Wherein part 7 is a support arm, and part 8---12 have constituted controlling organization.Support arm 7 is a slide block, and part 8 is a guide rail bracket, is provided with groove 81 on guide rail bracket 8, and support arm 7 can slide along groove 81.Guide rail bracket 8 is fixed on the connecting plate 3, and pulley 11 is housed on guide rail bracket 8.Part 9 is a steel wire rope, and an end of steel wire rope 9 is connecting support arm 7, and the other end is connecting the output shaft of motor 10.Pulley 11 plays the supporting steel wire rope.Motor 10 is fixed on the connecting plate 3, near any position that its starting switch can be located on the seat or seat is.Part 12 is a return spring.

The course of work of embodiment shown in Figure 1 is such:

When taking the people and need backrest to arch upward, only need the switch of actuating motor, make motor output shaft by counter clockwise direction rotation shown in Figure 1, apply pulling force by steel wire rope 9, overcome the resistance of spring 12, pulling support arm 7 slides outward along the groove of guide rail bracket 8, support arm 7 jack-up cantilever beams 4 make it to rotate around the axle of hinge 44, the head end 41 that causes cantilever beam raises, and overcome the resistance of spring 6, the head end 51 that drives accessory plate raises thereupon together, and the tail end 52 that drags accessory plate is realized arching upward of arch sheet assembly along upper bracket 2 downward translations.

Situation after arching upward as shown in Figure 2.

When taking when height of arching upward that the people need reduce backrest, only need the switch of actuating motor, make motor output shaft by with opposite clockwise direction rotation shown in Figure 2, under the pulling force effect of return spring 12, support arm 7 is return along the groove of guide rail bracket 8; Accessory plate is under the pulling force effect of return spring 6 simultaneously, and the tail end 52 of accessory plate is along upper bracket 2 upwards translations, and the

head end

41 and 51 that drives cantilever beam and accessory plate reduces, and the height that the arch sheet assembly arches upward reduces.

As shown in Figure 1, the arch sheet assembly is concave shape when not arching upward state.

In the present embodiment, after cantilever beam arched upward, the elasticity of waist holder depended on the elasticity of cantilever beam.And owing to arch upward highly more, the closer to hinge 44, then the elasticity of cantilever beam is high more to the strong point of cantilever beam for support arm, and this flexible Changing Pattern is fit to occupant's comfortableness requirement.

Fig. 3 is the local deformation of the embodiment of Fig. 1, and its cantilever beam adopts the resilient connection plate to connect with accessory plate.Fig. 3-1,3-2 are the description of the local detail of Fig. 3.

As shown in Figure 3, the arch sheet assembly comprises cantilever beam 4, accessory plate 5, resilient connection plate 45, position-limitting pin 14 etc.Connect with resilient connection plate 45 between cantilever beam 4 and the accessory plate 5, resilient connection plate 45 connects firmly with the head end of cantilever beam and accessory plate respectively is in the same place, and can use riveted joint, welding or Bolt Connection.Connect with hinge 16 between the tail end 52 of accessory plate and the position-limitting pin 14, so that free to rotate between position-limitting pin 14 and the accessory plate tail end 52.

Have groove 15 in upper bracket 2, position-limitting pin 14 can slide in groove 15.Position-limitting pin 14 guarantees that the tail end 52 of accessory plate is fitted on the plane of upper bracket 2 all the time.

All the other structures of Fig. 3 are same as in figure 1.

Fig. 3-1 is the described position-limitting pin of Fig. 3 14 and the structural relation figure of groove 15, hinge 16, accessory plate tail end 52.

Fig. 3-2 is the schematic diagram of the described waist holder of Fig. 3 when arching upward.The described embodiment of the course of work that it arches upward and Fig. 1 is similarly, and different is, shown in Fig. 3-2, because the strain of resilient connection plate 45, its high-order bit that arches upward is the garden arcuation, rather than tip-angled shape as shown in Figure 2.This garden arcuation is more comfortable when taking.

In Fig. 3, the return of arch sheet assembly does not need to rely on return spring, but relies on the tail end 52 and position-limitting pin 14 upwards translations of the elastic force promotion accessory plate of resilient connection plate 45, and the head end that drives cantilever beam and accessory plate reduces, and reaches the purpose of return.

In Fig. 3, the arch sheet assembly is straight shape when not arching upward state, can make the arch sheet assembly be concave shape when not arching upward state by the shape of adjusting resilient connection plate 45.

Fig. 4, Fig. 4 the-the 1st, the local deformation of the embodiment of Fig. 1, the slide block mechanism that its support assembly adopts manual flexible axle backguy to handle.Wherein Fig. 4 is a structural representation, and Fig. 4-1 is for removing the partial view behind arch sheet assembly and the support arm.

In Fig. 4, the design of part of pedestal assembly and arch sheet assembly is the same with Fig. 1.

Part

7,8,16,17,18 has constituted support assembly.

Part 7 is a support arm, and support arm 7 is a slide block, and part 8 is a guide rail bracket, is provided with groove 81 on guide rail bracket 8, and support arm 7 can slide along groove 81.Guide rail bracket 8 is fixed on the connecting plate 3.

16 is the flexible axle backguy, and 17 is handle, and 18 is sleeve.

Flexible axle backguy 16 comprises steel wire rope 161, hose coupling 162, flexible pipe 163.Hose coupling 162 installs with flexible pipe 163 and is one, and steel wire rope 161 passes from the hole of flexible pipe 163.Two hose couplings 162 are bearing in respectively in the hole of guide rail bracket 8 and sleeve 18.

Steel wire rope 161 two ends are connecting the axle head of support arm 7 and handle 17 respectively.

The axle and sleeve 18 thread connection of handle 17, sleeve 18 is fixed on the connecting plate 3.

The course of work of embodiment shown in Figure 4 is such:

When taking the people and need adjust the height that backrest arches upward, only need turn handle 17, because the axle and sleeve 18 thread connection of handle 17, and sleeve 18 is fixed, forcing handle to produce in rotation moves axially, drive steel wire rope 161 motions, and then drive support arm and groove 81 in, slides, thereby realization is to the adjustment highly of arching upward of arch sheet assembly.

Present embodiment has a benefit to be, owing to adopted the flexible axle backguy, makes handle and sleeve can be installed in the seat or near any position the seat, makes more convenient to operate to knob.

Fig. 5, Fig. 5-1 is that the controlling organization of support assembly adopts gear and thread transmission, support arm and the cantilever beam schematic diagram of the embodiment of hinge-coupled.Wherein Fig. 5 is a structural representation, and Fig. 5-1 is for removing the partial view behind arch sheet assembly and the support arm.

In Fig. 5, the design of part of pedestal assembly and arch sheet assembly is the same with Fig. 1.

Part

20,21,22,23 etc. has constituted support assembly, and wherein 20 is support arm, and 21 is nut, and 22 is driving gear, and 23 is driven gear.

Support arm 20 two ends connect with cantilever beam 4 and nut 21 with hinge respectively, and 22 and 23 is a pair of intermeshing conical gear, and the output shaft end 231 of driven gear 23 has external screw thread to be meshed with nut 21.

As seen, driving gear 22 connects with manual knob 221 usefulness coupling spindles 222, and is bearing in the supporting base 223 in Fig. 5-1.223 are fixed on the connecting plate 3.

Driven gear 23 is bearing in its supporting

base

232,23 supportings of 232 pairs of driven gears of supporting base and position-limiting action.

A pair of intermeshing conical gear in the present embodiment can replace with other mechanisms such as worm-and-wheel gear or spiral gear mechanism.

The course of work of present embodiment is described below:

When taking the people and need adjust the height that backrest arches upward, only need turn handle 221, driving gear 22 is along with handle rotates together, drive driven gear 23 rotations, driven gear drives its output shaft and rotates together, because output shaft is axially limited, the external screw thread drive nut 21 of output shaft end moves axially, and drive support arm 20 motions, realize adjustment to the height that arches upward of arch sheet assembly.

In process was highly arched upward in adjustment, spring 6 hauled accessory plate all the time and makes it to be pressed on the upper bracket 2.

Situation when wherein Fig. 6 does not arch upward for the waist holder, the situation when Fig. 6-1,6-2 arch upward for the waist holder.

As shown in Figure 6,61 is the steelframe in the backrest, and the upper bracket 2 and the lower carriage 1 of waist holder all connect firmly on steelframe 61.The cantilever beam of waist holder and accessory plate are the shape of indent, and fit with backrest material 62.

When the waist holder was arched upward, shown in Fig. 6-1, along with arching upward of the arch sheet assembly of waist holder, the backrest of seat correspondingly arched upward.

The schematic appearance of seat when Fig. 6-2 arches upward for the waist holder, 221 is manual knob.Situation when the situation when solid line represents that backrest has arched upward among the figure, dotted line represent that backrest does not arch upward, backrest is not the shape of indent when arching upward.

In above-mentioned several embodiment, the utility model can be selected different arch sheet assemblies and different support assemblies for use.Arch sheet assembly and support assembly among each embodiment can be arranged in pairs or groups mutually, thereby cause different waist holder structure forms.Outside the embodiment that the utility model is described, also have other version, but all version all has a something in common: promptly the arch sheet assembly comprise cantilever beam and with the joining gripper shoe of cantilever beam, cantilever beam can rotate, and the tail end of accessory plate can translation; The support arm of support assembly is supported on the middle part of cantilever beam.

Claims

1. Seat lumbar with cantilever beam structures, be used to be installed in the backrest to regulate the height that backrest arches upward, it comprises arch sheet assembly, support assembly and pedestal assembly, it is characterized in that the arch sheet assembly comprise rotary cantilever beam and with the joining accessory plate of cantilever beam, the tail end of accessory plate can be along the translation of pedestal assembly; Support assembly comprises support arm and controlling organization, and support arm is supported on the middle part of cantilever beam.

2. Seat lumbar according to claim 1 is characterized in that cantilever beam and accessory plate hinge-coupled, also can connect with the resilient connection plate.

3. Seat lumbar according to claim 1 is characterized in that connecting the arch sheet assembly that forms is indent when not arching upward shape with accessory plate by cantilever beam.

4. Seat lumbar according to claim 1 is characterized in that the support arm of support assembly can connect with cantilever beam with hinge, also can be the slide block that does not connect with cantilever beam.

5. Seat lumbar according to claim 1, the controlling organization that it is characterized in that support assembly are the steel wire rope mechanisms by pulley bearing.

6. Seat lumbar according to claim 1, the controlling organization that it is characterized in that support assembly are the flexible axle thread drawing mechanisms.

7. Seat lumbar according to claim 1, the controlling organization that it is characterized in that support assembly are conical gear and thread transmission.

8. Seat lumbar according to claim 1, the controlling organization that it is characterized in that support assembly can be manual control, also can be motoroperated.

9. Seat lumbar according to claim 7 is characterized in that the bevel gears in the controlling organization of support assembly can replace with worm-and-wheel gear or spiral gear mechanism.