CN203302679U

CN203302679U - Chair armrest

Info

Publication number: CN203302679U
Application number: CN201320155089XU
Authority: CN
Inventors: 黄琮纹
Original assignee: SHANGHAI GENMES OFFICE PRODUCTS CO Ltd
Current assignee: SHANGHAI GENMES OFFICE PRODUCTS CO Ltd
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-11-27
Anticipated expiration: 2023-03-29

Abstract

The utility model relates to a chair armrest comprising a cover body, a control element, a sliding plate, a fixed plate, a fixing device, a base and a lifting gear, wherein the cover body is used for covering; a pressing section is arranged at one side of the control element; plural tooth columns are arranged on the other side of the control element; a sliding bump is arranged below the sliding plate; plural latches are arranged at one side of the sliding plate; at least one slide chute is formed in the fixed plate, so that the sliding bump of the sliding plate is imbedded into the slide chute; a sliding guide area is arranged above the fixing device; slideways are respectively arranged at two side edges of the sliding guide area; at least one channel is arranged in the middle of the fixing device; the plural latches are arranged at one side of the fixing device; a rail groove is concavely formed below the each side edge of the fixing device; the base is combined correspondingly to the cover body and provided with two tracks; the upper part of the lifting gear is connected with the channel of the fixing device and fixed together with the fixed plate. A chair armrest body moves left and right inside the slide chute of the fixed plate by using the sliding bump of the sliding plate; the front and rear clipping slide between each rail groove of the fixing device and the corresponding track of the base is matched with pulling displacement of the height lifting gear, so that the chair armrest is smooth to slide, and good in structure strength.

Description

Chair armrest

Technical field

The utility model relates to a kind of Chair armrest, relates in particular to a kind of handrail and has the Chair armrest that can reach level and Height Adjustment position.

Background technology

Armrest structure of chairs commonly used refers to Figure 13 to shown in Figure 16, the horizontal regulating structure of this Chair armrest, to be provided with fixture 82 on the pedestal 81 of Chair armrest, these fixture 82 sides are provided with tooth section 821, bottom has a long protuberance 822, for track 83 top offsets of inserting this pedestal 81, stator 84 2 sides are provided with tooth section 841, bottom is equipped with fixed leg 842, in the appearance hole 823 of inserting fixture 82, and be fixedly arranged on (not shown) on the handrail pivot arm of this Chair armrest, gear 85 is inserted respectively fixture 82 sides, the tooth section 841 of stator 84 is meshed respectively by this tooth section 851, the first tooth section 861 of this adjustment part 86 and the tooth section 851 of gear 85 mesh, another the second tooth section 862 and the tooth section 821 of fixture 82 mesh, the spring 863 of adjustment part 86 is limited to 811 of the stoppers of control part 864 and pedestal 81, while using Chair armrest to carry out the front and back horizontal adjusting in pedestal 81, press this adjustment part 86 to compress this spring 863, the first tooth section 861 of adjustment part 86 is broken away from the tooth section 851 of gear 85, and the second tooth section 862 breaks away from (as shown in figure 14) with the tooth section 821 of fixture 82, the user grips this pedestal 81, and utilize the track 83 of pedestal 81 and long protuberance 821 relative displacements of fixture 82 to slide, pedestal 81 is reached and moved forward and backward, after pedestal 81 moves to the acquiescence front and back position, while unclamping this adjustment part 86, the elastic force of spring 863 resets adjustment part 86, force simultaneously the first tooth section 861 of adjustment part 86 and tooth section 851 engagements of gear 85, the second tooth section 862 and the tooth section 8 21 of fixture 82 mesh, and then make pedestal 81 reach clip positioning function (as shown in figure 15), when another use Chair armrest carries out the left and right horizontal adjustment in pedestal 81, press this adjustment part 86 to compress this spring 863, the first tooth section 861 of adjustment part 86 is broken away from the tooth section 851 of gear 85, and the second tooth section 862 breaks away from the tooth section 821 of fixture 82, the user will grip pedestal 81, and utilize the appearance hole 823 of fixture 82 and fixed leg 842 relative displacements of stator 84 to slide, and the tooth section 851 of mate gear 85 and the mutual rotary drive of tooth section 841 of stator 84, pedestal 81 is reached and moved left and right, in like manner, after pedestal 81 moved to acquiescence position, left and right, while unclamping this adjustment part 86, the elastic force of spring 863 resetted adjustment part 86, and what adjustment part 86 was replied makes flowing mode with previous described identical, and then makes pedestal 81 reach clip positioning function (as shown in figure 16).

The lift in height of another Chair armrest is adjusted structure, please continue and consult Figure 17 and shown in Figure 180, articulated section 92 and the chair of the pin joint seat 91 of this handrail are signed an undertaking and are closed, the blocking part 93 of pin joint seat 91 is provided with in the movable housing 95 that plural slotted eye 94 is placed in hollow, place, the interior top of movable housing 95 is provided with locating slot 96, pivot 971 for clamping rod 97 tops is inserted pivotable, clamping rod 97 bottoms are provided with snap fit edge 972, top one side forms one and draws the section of pulling 973, and this snap fit edge 972 is for slotted eye 94 clips with pin joint seat 91 blocking parts 93; Use while adjusting the Chair armrest height, that pulls that clamping rod 97 is stretched on movable housing 95 outsides draws the section of pulling 973, make clamping rod 97 take pivot 971 and be that pivot point makes a beat pivotable, and then the outside beat of the snap fit edge 972 that makes bottom breaks away from the slotted eye 94 of pin joint seat 91, can drive movable housing 95 makes progress, moves down and adjust height, when the user loosen clamping rod 97 draw the section 973 of pulling the time, 972 beats by the gravity generation of clamping rod 97 own of snap fit edge move automatically and slotted eye 94 mutually hooks and holds location, make integral body have the function of adjusting handrail height.

While commonly using the horizontal regulating structure of Chair armrest, because this stator is the appearance hole of this fixture that stretches through, and be fixedly arranged on the handrail pivot arm of this Chair armrest, form a pivot point structure, therefore when adjustment part breaks away from fixture and gear, pedestal utilizes the long protuberance of the relative fixture of track, and the displacement of default stroke before and after reaching, and when Chair armrest is wanted the left and right displacement adjustment, need to wait and wait after these front and back preset stroke and complete, or utilize the fixed leg of the relative stator in appearance hole of adjustment part, the tooth section of the tooth section of mate gear and stator rotates start mutually again, and the location after displacement, again need be by the first tooth section of adjustment part and the tooth section engagement of gear, the tooth section engagement of the second tooth section and fixture, therefore this commonly uses Chair armrest is to utilize gear to adjust level interval and clip location, the tooth section spacing that all depends on gear, can be more accurate if tooth section adjusts spacing than detailed rules and regulations, but the meticulous easy generation fracture of tooth section, otherwise, if tooth section is thicker, though intensity is easy fracture more greatly and not, but it is accurate not to adjust spacing, and the tooth section precision of gear and the tooth section of fixture, the tooth section fit tolerance of stator needs comparatively accurate, otherwise the situation that easily has different sound and structure to have some setbacks, cause and affect having some setbacks of adjustment of displacement.

The lift adjustment structure of another this Chair armrest height, though utilize the section of pulling of drawing that pulls clamping rod, make clamping rod take locating slot and be that pivot point makes a beat pivotable, and the snap fit edge is able to segmentation and hooks and to be butted in the slotted eye of pin joint seat, but, this clamping rod, easily because of gravity or accidentally touch to drawing the section of pulling, will cause the snap fit edge to break away from the slotted eye of blocking part, cause and affect the lift adjustment of Chair armrest height positioning function; Therefore for the puzzlement of above-mentioned prior art, the necessity of solving is arranged in fact.

Summary of the invention

The utility model technical issues that need to address have been to provide a kind of Chair armrest, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: a lid, for covering; One control piece; This control piece more comprises a spring; This control piece is provided with a ，Ling limit, press section on one side and is provided with plural tooth post; One slide; This slide has a slide bumping, Yi Bian be provided with plural latch, for the tooth post clip of this control piece; One stator; This stator is provided with at least one chute, inserts for the slide bumping of this slide; One fixture; This fixture top is provided with a slide guide district, the two limit ora terminalis in this slide guide district respectively are provided with a slideway, for this slide, insert, in the middle of this fixture, be provided with a recess, for this stator, insert, this recess is provided with at least one conduit, and this fixture one side is provided with plural latch, for the tooth post clip of this control piece, these fixture two side edge belows respectively are concaved with a rail groove; One base; Corresponding this lid combination of this base, centre are provided with holds hole, inserts for the recess of this fixture, and this base is provided with two tracks, establishes slip for the rail groove card of this fixture; An and lowering or hoisting gear; This lowering or hoisting gear top connects the conduit of this fixture, and fixes with this stator.

Compared with prior art, the beneficial effects of the utility model are: utilize the slide bumping of slide to move left and right in the chute of stator, and the rail groove of fixture and the interorbital front and back of base clip slide, the engagement height lowering or hoisting gear pull the displacement of pulling, make Chair armrest adjust the restriction that is not subjected to tooth section on spacing, comparatively smooth and easy and structural strength is better in slip.

The accompanying drawing explanation

Fig. 1 is the decomposing schematic representation of the utility model Chair armrest.

Fig. 2 is another decomposing schematic representation of the utility model Chair armrest.

Fig. 3 is the lowering or hoisting gear decomposing schematic representation of the utility model Chair armrest.

Fig. 4 is the combination generalized section of the utility model Chair armrest.

Fig. 5 is the schematic diagram of the utility model Chair armrest control piece lock-out state.

Fig. 6 is the schematic diagram of the utility model Chair armrest control piece release conditions.

Fig. 7 is the illustrative view of adjusting before and after the utility model Chair armrest level.

Fig. 8,9 is that the action schematic diagram is adjusted in the utility model Chair armrest level left and right.

Figure 10～12 are the action schematic diagram that the utility model Chair armrest device for adjusting height is adjusted.

Figure 13 is the generalized section of prior art Chair armrest combination.

Figure 14 is the generalized section that prior art Chair armrest adjustment part and fixture tooth section break away from.

Figure 15 locates the generalized section of inlay card after the adjustment displacement before and after prior art Chair armrest level.

Figure 16 is the generalized section of location inlay card after the adjustment displacement of prior art Chair armrest level left and right.

Figure 17 is the decomposing schematic representation of prior art Chair armrest lift adjustment structure.

Figure 18 is the side cutaway view of prior art Chair armrest lift adjustment structure.

The specific embodiment

Below in conjunction with accompanying drawing and the specific embodiment, the utility model is described in further detail:

The utility model includes: a lid, for covering; One control piece, more comprise a spring, is provided with plural tooth post on one side this control piece is provided with a ，Ling limit, press section; One slide, have a slide bumping, Yi Bian be provided with plural latch, for the tooth post clip of this control piece; One stator, be provided with at least one chute, inserts for the slide bumping of this slide; One fixture, top is provided with a slide guide district, the two limit ora terminalis in this slide guide district respectively are provided with a slideway, for this slide, insert, be provided with a recess in the middle of this fixture, insert for this stator, this recess is provided with at least one conduit, this fixture one side is provided with plural latch, and for the tooth post clip of this control piece, these fixture two side edge belows respectively are concaved with a rail groove; One base, corresponding this lid combination, centre is provided with and holds hole, inserts for the recess of this fixture, and this base is provided with two tracks, establishes slip for the rail groove card of this fixture; And a lowering or hoisting gear, top connects the conduit of this fixture, and fixes with this stator.

Above-mentioned Chair armrest, wherein, this lowering or hoisting gear more comprises a pin joint seat, a clip assembly, a movable housing spare, and this pin joint seat one end is to sign an undertaking and close for chair in articulated section, and this pin joint seat another end is in a blocking part, to be provided with plural slotted eye; This clip assembly comprises and draws the bar of pulling, a clipping block, a spring, and this draws bar one end of pulling to be provided with to draw the section of pulling, another end to be provided with a pushing part; In this clipping block, be provided with a skewed slot, draw the pushing part of the bar of pulling to insert for this, this clipping block one end is provided with a clip and hooks, and for the pull slotted eye of this pin joint seat of hook, this clipping block is provided with a spring room and inserts for this spring; The blocking part of sheathed this pin joint seat of this movable housing, this movable housing be provided with an opening for this draw drawing of the bar of pulling to pull to deploy into.

Above-mentioned Chair armrest, wherein, the movable housing of this lowering or hoisting gear more comprises one in conjunction with guide block, and this is based in this movable housing top in conjunction with guide block, this is combined with the conduit of this stator, fixture in conjunction with guide block, makes the conduit cunning of this fixture stretch in this in conjunction with between guide block.

Above-mentioned Chair armrest, wherein, this control piece more comprises a ，Gai butting section, butting section and is installed in this press section inner edge, for this spring against.

Above-mentioned Chair armrest, wherein, this base more comprises a spring groove post, inserts for this spring.

Above-mentioned Chair armrest, wherein, more comprise at least one fixture, and the conduit that this fixture wears this fixture is combined with this lowering or hoisting gear.

Above-mentioned Chair armrest, wherein, this lowering or hoisting gear more comprises a pivot and holds piece, and this pivot holds in piece accommodating for this clip assembly, and this pivot holds the piece holding and is located in this movable housing.

Hereby by above explanation, learnt, the utility model is compared with prior art, really has advantages of as follows:

1, during the utility model Chair armrest horizontal adjusting, utilize the slide bumping of slide in the chute of stator, to carry out slippage, make Chair armrest not be difficult for by the spacing of tooth section restricted, comparatively better along Yang and structural strength in slip.

2, the utility model Chair armrest is in front and back or during left and right displacement, the latch of this slide is to keep the same level height displacement with the latch of fixture, therefore the location after displacement, only need this fixture of the relative clip of tooth post of control piece and the latch of slide, can reach relative clip location, therefore this location structure is simple, the tooth section tolerance doubt of gearless, avoid the facts that causes slippage to have some setbacks.

3, during the utility model Chair armrest Height Adjustment, the vertical deviation of the bar of pulling is drawn in utilization, make to draw the pull pushing part of bar to be able to carry out slide guide in the skewed slot of clipping block, and elastic force and the restoring force start of cooperation spring, make the clip of clipping block hook the clip location that can carry out to the slotted eye of pin joint seat Height Adjustment or break away from displacement stroke, and be difficult for affecting positioning function because of the external force collision.

Refer to Fig. 1 to shown in Figure 4, the utility model relates to a kind of Chair armrest, includes: a lid 1, for covering; One control piece 2, be provided with a butting section 22 Yi Bian be provided with 21，Zai press section, press section 21 inner edges, for a spring 23, is provided with the tooth post 24 that plural number is arranged against, this another limit of control piece 2; One slide 3, have a slide bumping 31, Yi Bian be provided with plural latch 32, for tooth post 24 clips of this control piece 2; One stator 4, comprise at least one fixture 41, and this stator 4 is provided with at least one chute 42, inserts for the slide bumping 31 of this slide 3, and this fixture 41 wears the perforation 43 of stator 4; One fixture 5, top is provided with a slide guide district 51, slide guide district 51 2 limit ora terminalis respectively are provided with a slideway 52, for slide 3, insert slide guide, be provided with a recess 53 in the middle of fixture 5, insert for stator 4, recess 53 is provided with at least one conduit 54, fixture 5 one sides are provided with plural latch 55, and for tooth post 24 clips of this control piece 2, these fixture 5 two side edge belows respectively are concaved with a rail groove 56; One base 6, corresponding lid 1 combination, base 6 one ends are provided with a spring groove post 61, spring 23 for control piece 2 is inserted, and form and press the pushing and pressing space with control piece 2, in the middle of this base 6, be provided with and hold hole 62, for the recess 53 of fixture 5, insert, these base 6 end faces are provided with corresponding track 63, establish slip for the mutual card of rail groove 56 of fixture 5; One lowering or hoisting gear 7, include a pin joint seat 71, a pivot and hold piece 72, a clip assembly 73, a movable housing 74 and form; These pin joint seat 71 1 ends are articulated section 711, and for chair, signing an undertaking and close, another end is a blocking part 712, inside is provided with plural slotted eye 713; It is interior accommodating for clip assembly 73 that pivot holds piece 72, this clip assembly 73 comprises and draws pull bar 731, a clipping block 734, a spring 738, this draws bar 731 1 ends of pulling to be provided with the section of pulling 732 of drawing, another end is provided with a pushing part 733, in this clipping block 734, be provided with a skewed slot 735, insert for these pushing part 733 slide guides, clipping block 734 1 ends are provided with a clip and hook 736, for the pull slotted eye 713 of pin joint seat 71 of hook, this clipping block 734 is provided with the spring room 737 that can insert for spring 738; This pivot of the interior confession of this movable housing 74 holds piece 72 holdings and is installed with, these movable housing 74 tops are equipped with one in conjunction with guide block 741, this is in conjunction with conduit 54 combinations of guide block 741 with stator 4, fixture 5, after this lid 1 and base 6 combinations, this fixture 5 can stretch in this in conjunction with 741 of guide blocks by conduit 54 is sliding, the blocking part 712 of the movable housing 74 sheathed pin joint seats 71 in below, movable housing 74 are provided with an opening 742 and draw the section of pulling 732 to insert for what draw the bar 731 of pulling.

The continuous Fig. 1 that refers to is to shown in Figure 4, when Chair armrest is established in group, the recess of fixture 5 53 is inserted in the appearance hole 62 of base 6, the rail groove 56 of this fixture 5 is arranged on the track 63 of base 6 and slides, stator 4 is inserted in the recess 53 of fixture 5, and utilize fixture 41 to wear the perforation 43 of this stator 4, the conduit 54 of fixture 5 is fixing in conjunction with guide block 741 with the movable housing 74 of lowering or hoisting gear 7, make fixture 5 conduit 54 can in stator 4 and movable housing 74 in conjunction with 741 slide guide displacements of guide block, two limit ora terminalis of this slide 3 are inserted in the slideway 52 in fixture 5 slide guide districts 51, the slide bumping 31 of this slide 3 is inserted in the chute 42 of stator 4, spring 23 is mounted on to 22 of the butting sections of the spring groove post 61 of base 6 and control piece 2, the tooth post 24 of control piece 2 and the latch 55 of fixture 5, the corresponding clip of latch 32 of slide 3, the corresponding base 6 of lid 1 covers, the clip assembly 73 of lowering or hoisting gear 7 is inserted to pivot to be held in piece 72, the clip hook 736 of clipping block 734 hooks the slotted eye 713 of the pin joint seat 71 of pulling, spring room 737 and pivot that spring 738 is inserted clipping block 734 hold 72 of pieces, draw the pushing part 733 of the bar 731 of pulling to insert in the skewed slot 735 of clipping block 734, the pivot of tool clip assembly 73 is held to piece 72 holdings to be located in this movable housing 74, again by the locking of fixture 41, make the movable housing 74 can be by the clipping block 734 elasticity starts of drawing the bar 731 of pulling, to reach the slotted eye 713 inlay card displacements with pin joint seat 71 blocking parts 712.

The continuous Fig. 2 that refers to, Fig. 5 is to shown in Figure 7, Chair armrest is before horizontal adjusting, during rear position, press 21Shi butting section, press section 22 Compress Springs 23 of control piece 2, the tooth post 24 of control piece 2 breaks away from the latch 55 of fixture 5 and the latch 32 of slide 3, before the operator can utilize lid 1 and base 6 track 63 of base 6 to reach with the rail groove 56 of fixture 5, rear movement, and behind precalculated position, discharge the press section 21 of this control piece 2, make spring 23 elastic recoverys, the latch 55 of the tooth post 24 clip fixtures 5 of this control piece 2, the latch 32 of slide 3, then complete the positioning function that moves forward and backward of Chair armrest, in like manner, the continuous Fig. 1 that refers to, Fig. 2, Fig. 5, Fig. 6, Fig. 8, shown in Figure 9, Chair armrest is in a horizontal adjusting left side, during right position, the latch 55 that breaks away from fixtures 5 when the tooth post 24 of control piece 2 is during with the latch 32 of slide 3, the operator also can utilize lid 1 and base 6 track 63 of base 6 to drive rail groove 56 slide displacements of fixture 5, the slide 3 that makes simultaneously to be positioned at fixture 5 slide guide districts 51 utilizes slide bumping 31 left in the chute 42 of stator 4, position moves right, when mobile default location completes, the press section 21 of release control spare 2 makes spring 23 elastic recoverys, the tooth post 24 of this control piece 2 is by the latch of clip fixture 5 55, the latch 32 of slide 3, then to become the left and right displacement positioning function of Chair armrest, the continuous Fig. 3 that refers to, Fig. 4, Figure 10 is to shown in Figure 12, Chair armrest is on Height Adjustment, during upper/lower positions, that in movable housing 74 outer ends to upper plate, pulls clip assembly 73 draws the section of pulling 732, make to draw the pull pushing part 733 of bar 731 to hold in piece 72 and to produce a vertical displacement in this pivot, because this skewed slot 735 only holds and stretches for this pushing part 733, therefore when pushing part 733 displacement strength reach skewed slot 735 upper limb of clipping block 734, to cause clipping block 734 levels to compress backward this spring 738, make the slotted eye 713 of the clip hook 736 disengaging pin joint seats 71 of front end, now this movable housing 74 holds piece 72 start in the lump together with pivot, can drive the Chair armrest that upper end sets firmly and carry out the upper of Height Adjustment, bottom offset, when release draw the bar 731 of pulling draw the section 732 of pulling the time, the elastic recovery of spring 738, to promote this clipping block 734 horizontal shifts, and by the guiding of skewed slot 735, make to draw pull the draw section of pulling 732 and the pushing part 733 of bar 731 to hold piece 72 displacement vertically downward in pivot, and the clip of this clipping block 734 hooks 736 slotted eyes 713 of clip pin joint seat 71 forward, to reach Chair armrest, carry out the inlay card positioning function of Height Adjustment.

In sum, during the horizontal adjusting displacement of the utility model Chair armrest, be that slide bumping by slide carries out slippage in the chute of stator, make the spacing of Chair armrest when moving left and right more not be subject to the restriction of tooth section, comparatively better along Yang and structural strength in slip; The latch of this slide is to keep the same level height displacement with the latch of fixture again, therefore the position after displacement only needs this fixture of the relative clip of tooth post of control piece and the latch of slide, can reach clip location simple in structure; And during the Chair armrest Height Adjustment, to utilize the vertical deviation that draws the bar of pulling, make this pushing part be able to carry out slide guide in the skewed slot of clipping block, and elastic force and the restoring force start of cooperation spring, make the clip of clipping block hook the clip location that can carry out to the slotted eye of pin joint seat Height Adjustment or break away from displacement stroke, and be difficult for affecting positioning function because of the external force collision.

The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification, all should belong in the scope of the utility model claim protection.

Claims

1. Chair armrest is characterized in that comprising: a lid, for covering; One control piece; This control piece more comprises a spring; This control piece is provided with a ，Ling limit, press section on one side and is provided with plural tooth post; One slide; This slide has a slide bumping, Yi Bian be provided with plural latch, for the tooth post clip of this control piece; One stator; This stator is provided with at least one chute, inserts for the slide bumping of this slide; One fixture; This fixture top is provided with a slide guide district, the two limit ora terminalis in this slide guide district respectively are provided with a slideway, for this slide, insert, in the middle of this fixture, be provided with a recess, for this stator, insert, this recess is provided with at least one conduit, and this fixture one side is provided with plural latch, for the tooth post clip of this control piece, these fixture two side edge belows respectively are concaved with a rail groove; One base; Corresponding this lid combination of this base, centre are provided with holds hole, inserts for the recess of this fixture, and this base is provided with two tracks, establishes slip for the rail groove card of this fixture; An and lowering or hoisting gear; This lowering or hoisting gear top connects the conduit of this fixture, and fixes with this stator.

2. Chair armrest according to claim 1, it is characterized in that: this lowering or hoisting gear more comprises a pin joint seat, a clip assembly, a movable housing spare, this pin joint seat one end is to sign an undertaking and close for chair in articulated section, and this pin joint seat another end is in a blocking part, to be provided with plural slotted eye; This clip assembly comprises and draws the bar of pulling, a clipping block, a spring, and this draws bar one end of pulling to be provided with to draw the section of pulling, another end to be provided with a pushing part; In this clipping block, be provided with a skewed slot, draw the pushing part of the bar of pulling to insert for this, this clipping block one end is provided with a clip and hooks, and for the pull slotted eye of this pin joint seat of hook, this clipping block is provided with a spring room and inserts for this spring; The blocking part of sheathed this pin joint seat of this movable housing, this movable housing be provided with an opening for this draw drawing of the bar of pulling to pull to deploy into.

3. Chair armrest according to claim 2, it is characterized in that: the movable housing of this lowering or hoisting gear more comprises one in conjunction with guide block, this is based in this movable housing top in conjunction with guide block, this is combined with the conduit of this stator, fixture in conjunction with guide block, makes the conduit cunning of this fixture stretch in this in conjunction with between guide block.

4. Chair armrest according to claim 1, it is characterized in that: this control piece more comprises a ，Gai butting section, butting section and is installed in this press section inner edge, for this spring against.

5. Chair armrest according to claim 3, it is characterized in that: this base more comprises a spring groove post, inserts for this spring.

6. Chair armrest according to claim 1 is characterized in that: more comprise at least one fixture, the conduit that this fixture wears this fixture is combined with this lowering or hoisting gear.

7. Chair armrest according to claim 2 is characterized in that: this lowering or hoisting gear more comprises a pivot and holds piece, and this pivot holds in piece accommodating for this clip assembly, and this pivot holds piece holding and is located in this movable housing.