CN101357259B

CN101357259B - Seat mechanism

Info

Publication number: CN101357259B
Application number: CN 200810109227
Authority: CN
Inventors: B·N·海克; K·C·隆格伦
Original assignee: Brunswick Corp
Current assignee: Brunswick Corp
Priority date: 2007-03-29
Filing date: 2008-03-28
Publication date: 2013-10-23
Anticipated expiration: 2028-03-28
Also published as: CA2627150A1; CN101347669A; CN101347669B; CA2627150C; CA2627145A1; CA2627145C; CN101357259A

Abstract

Described are several mechanisms for permitting a user to adjust the seat on a stationary exercise bicycle. The described mechanisms can be used to adjust the height of the seat or the fore and aft positioning of the seat on an upright type bicycle. Each of the described mechanisms can be configured to provide users with an optimum seat position and with a convenient latch mechanism to adjust theposition of the seat.

Description

Seat mechanism

Technical field

Mechanism described in the invention is usually directed to body-building equipment, and relates more specifically to the seat mechanism for stationary exercise bicycle.

Background technology

Like thinking it is a kind of especially effectively Aerobics by bike many mountain regions shape mountain region sports fan or common or " Sunday " people by bike by bike.Still a kind of physical training style of low impact-type by bike, this is especially comfortable to knee and pin.Consequently, promote that the stationary exercise bicycle of this type games all is very popular in family and health club.

Operation about Exercycle, studies show that by bike optimized vehicle seat put be pin as the cyclist during at minimum pedal position the height of vehicle seat allow cyclist's crooked about 15 degree of leg, and seat post is positioned in the rear of pedal crank and passes through along a straight line pedal crank on the direction that becomes about 71 degree angles with horizontal line.Therefore, the optimized vehicle seat of each cyclist's needs is equipped with a great difference.

Studies show that, even the slight variations of vehicle seat position also can make the muscle that works and/or the part of muscle change.Typical vehicle seat location means only provides large-scale adjusting space, and this device has limited the user and cosily transferred the ability that different muscle are devoted oneself to work.

Consider these and other problem, we know that we need the vehicle seat navigation system that a kind of height is adjustable and be easy to control.Prevailing vehicle seat height adjusting form comprises uses a pin that usually is fixed in the framework of Exercycle, and the frequent spring by in the numerous holes that are inserted on the seat post of this pin loads, and these holes are used for locating above-mentioned vehicle seat.Yet there are many drawbacks in this set, comprising extracting that pin is dismantled bicycle and because the interval between each hole on the pillar, so that vehicle seat can only be positioned with about one inch increment.A kind of method that addresses the above problem is implemented in the Exercycle that the Cybex Intl. by Massachusetts Medway city produces.In this product, seat post has opening, and these openings are included in the aduncate aileron part of lower edge of each opening, and this opening allows the user that vehicle seat is upwards pulled out to be positioned at a reposition and need not extract pin.This device provides a kind of ratchet effect, because when seat post moves up, these ailerons shift out opening with directing pin.Yet this mode still needs the user manually to extract pin to reduce vehicle seat.And the shape of opening causes the vertical position increment of vehicle seat to be at least one inch.The patent No. is to have described a kind of solution to the problems described above in the United States Patent (USP) of US6913560, thereby it is fixed on tooth bar and on the seat post by one and has the bolt mechanism that release lever can make vehicle seat be lowered and realize.

We have realized that vehicle seat needs forwardly with on rear portion or the horizontal direction to be conditioned.The Exercycle of many " pin " types of being produced by for example LeMond and Star Track company has been used the mechanism that can allow vehicle seat to be moved forward and backward.Routinely, these mechanisms have used the anchor clamps of screw type with the locking vehicle seat.One of them example used a kind of can with the close-fitting assembly of seat post, it slides before and after taking over a business with respect to one on the seat post.Have the screw of nut and match with screw thread on the vehicle seat, thereby vehicle seat is clamped with respect to seat post.There are many defectives that are unfavorable for that the user uses that comprise in the mechanism of above type.

Summary of the invention

The present invention has illustrated many mechanisms, and these mechanisms can make the vehicle seat of stationary exercise bicycle vertically and on the horizontal level all can regulate, thereby provide the convenient manner of selecting multiple vehicle seat position for the user.

Description of drawings

Fig. 1 is the side view that the first representational stationary exercise bicycle device is arranged;

Fig. 2 is the right side perspective view for the first adjustable car seat mechanism of stationary exercise bicycle shown in Figure 1;

Fig. 3 is the right side perspective view of adjustable car seat mechanism shown in Figure 2;

Fig. 4 is the decomposition view of adjustable car seat mechanism shown in Fig. 1,2 and 3;

Fig. 5 is the top view for the rackwork of adjustable car seat mechanism shown in Fig. 1 and 2-4;

Fig. 6 is the cutaway view of rackwork shown in Figure 5 6-6 intercepting along the line;

Fig. 7 is the rearview for the seat post of adjustable car seat mechanism shown in Fig. 1 and Fig. 2-6; With

Fig. 8 is the rearview for the support component of the vertical seat post of adjustable car seat mechanism shown in Fig. 1-7;

Fig. 9 is the left view that the second representational stationary exercise bicycle device is arranged;

Figure 10 be for stationary exercise bicycle device shown in Figure 9 can be vertically and the vehicle seat left side flatly regulated look cutaway view;

Figure 11 is the top view of some part that the device of Figure 10 is shown;

Figure 12 looks cutaway view be used to the left side of some part of the bolt mechanism that horizontal mechanism shown in Figure 10 is shown;

Figure 13 looks cutaway view be used to the partial left of some part of the bolt mechanism that horizontal device shown in Figure 12 is shown;

Figure 14 is the broken section top view of the bolt mechanism part 14-14 along the line of device shown in Figure 13;

Figure 15 is the broken section left view of the part of vehicle seat level(l)ing mechanism shown in Figure 10;

Figure 16 is the broken section right view of the part of vehicle seat level(l)ing mechanism shown in Figure 10;

Figure 17 is the broken section front view of the part of vehicle seat level(l)ing mechanism shown in Figure 10;

Figure 18 and Figure 19 are the broken section right views of operation that the bolt mechanism of vehicle seat level(l)ing mechanism shown in Figure 10 is shown;

The specific embodiment

Fig. 1 has illustrated the first stationary exercise bicycle device 10, and it comprises the first embodiment of tubular frame 12, control panel 14, driven unit 16, right-hand tread plate 18, left-hand tread plate 20, handle 22 and adjustable seat mechanism 24.Framework 12 is supporting constructions of stationary exercise bicycle device 10, and it can be any suitable structure.Should be appreciated that, various frame structure all can be used for the parts of bracing or strutting arrangement 10, for example is used for the framework of existing stationary exercise bicycle.Shown in preferred embodiment in, framework 12 comprises rear portion cross portion 26, anterior cross portion 28, be fixed on the longitudinal bracing parts 30 of the summary bending between rear portion cross portion 26 and the anterior cross portion 28, be fixed on the vertical support component 32 of first on the longitudinal bracing parts 30, be fixed on the support arm parts 34 between longitudinal bracing parts 30 and the first vertical support component 32, be fixed on the horizontal support member 36 on the first vertical support component 32, be fixed on the vertical support component 38 of second on the horizontal support member 36, be fixed on the second support component 40 between horizontal support member 36 and the longitudinal bracing parts 30 and be fixed on central horizontal support component 41 between the first vertical support component 32 and the second support component 40.The first vertical support component 32 provides support for adjustable seat mechanism 24 and vehicle seat 42.The second vertical support component 38 provides support for control panel 14 and handle 22.

Rear portion cross portion 26 and anterior cross portion 28 are configured to be arranged on the floor 44.Level meter 46 is arranged on the rear portion cross portion 26, therefore can not raise or reduce rear portion cross portion 26 at ordinary times when floor 44, thus so that rear portion cross portion 26, longitudinal bracing parts 30 and anterior cross portion 28 basic horizontal.Roller 48 is positioned on the anterior cross portion 28, so that stationary exercise bicycle device 10 can be by easily from a position movement to the another location.

Stationary exercise bicycle device 10 also comprises and is labeled as 50 right cover and similar left cover 51 with protection and covers the inner body of stationary exercise bicycle device 10.The same with most of Exercycle, inner body is centrally located between user's two legs substantially, thereby has guaranteed stability, and for light and simple design provide may.

Should be noted that aforesaid Exercycle 10 is representational in a large amount of existing stationary exercise bicycles, is used for as providing preferred environment at this illustrated seat mechanism.

Fig. 2-8 has illustrated the preferred structure of the first embodiment of adjustable seat mechanism 24.Although seat mechanism 24 can be used for many dissimilar Exercycle, equally also can be used for the body-building equipment of other types, for convenience's sake, only the seat mechanism 24 in the stationary bicycle 10 of context is described at this.As previously described above, first of framework 12 the vertical support component 32 provides support for adjustable seat mechanism 24.In this embodiment, be used for that the seat post of supporting seat 42 or arm 93 be configured to move up and down in the first vertical support component 32.Seat post 93 disposes groove 94, and it also slides up and down in annular element 96, and this annular element 96 is fixed to the top of the first vertical support component 32.This vertical support component 32 also comprises the hole 98 for a part that receives seat mechanism 24.

Tooth bar 100 is arranged in the groove 94 that is formed in the seat post 93.With reference to figure 7 and Fig. 8, tooth bar 100 comprises elongation core 101, and this core has semi-circular ends 102, and this end is provided with for the hole 103 that receives the securing member (not shown) so that tooth bar 100 is fixed in the groove 94 of seat post 93.Should be noted in the discussion above that tooth bar 100 can be fixed to seat post 93 with various ways, comprise being welded in seat post 93 or one-body molded with seat post 93.Tooth bar 100 comprises the nearer tooth in a large amount of intervals 104.As shown in Figure 6, each tooth 104 includes horizontal surface 106 and angled surperficial 108.Because the tooth 104 that a large amount of intervals are nearer is used for tooth bar 100, therefore can be vehicle seat 42 provides a large amount of vertical positions.

As Fig. 3 and Fig. 4 were shown specifically, the door bolt of adjustable seat mechanism 24 partly comprised U-shaped door bolt supporting bracket 110, connecting shaft component 112, axle bush 114, door bolt parts 116, door bolt spring 118, set bolt 120 and locating ring 122.U-shaped support 110 comprises the

hole

124 and 126 that takes shape in wherein, and ratchet or projection 128.Connecting shaft component 112 comprises having the axle 130 that is labeled as 132 flat surfaces, the ladder support frame 134 with ear shape part 136 and door bolt release lever 138.Door bolt parts 116 comprise circular cylinder shaped portion 140 and tooth bar bonding part 146, and this circular cylinder shaped portion 140 has one and forms and perforation boring 142 thereon and the hole 144 that is used for receiving set bolt 120 formed thereon.This tooth bar bonding part 146 is configured with conventional horizontal planar surface 148 and a pair of angled surperficial 150.Door bolt spring 118 comprises circular portion 152 and L shaped part 154.

Continuation is with reference to figure 3 and Fig. 4, and locating ring 122, axle bush 114, door bolt parts 116 and door bolt spring 118 all are fixed on the axle 130 of connecting shaft component 112.Accordingly, the axle 130 of connecting shaft component 112 extends through the hole 126 that is formed on the U-shaped support 110, passes the boring 142 of the tubular portion 140 that forms and run through door bolt parts 116, and passes the circular portion 152 of door bolt spring 118.When being installed in axle 130, the L shaped part 154 of door bolt spring 118 engages with door bolt parts 116.Antitorque screw 120 inserts the hole 144 of passing in the tubular portion 140 that is formed at door bolt parts 116, thereby and engages with the flat surfaces 132 of axle 130 and will fasten tooth bar 116 with a bolt or latch and remain positioned in appropriate position on the axle 130.Similarly, locating ring 122 and axle bush 114 assist said modules is remained on specific position.

Adjustable seat mechanism 24 can be installed on the support component 32 by any suitable mounting means.Fig. 2 namely shows an example in this sample loading mode, and wherein one group of tapping screw 156 is inserted in the hole 124 that is formed in the U-shaped support 110.When installation car seat strut support component 32, door bolt parts 116 extend and by being formed at the hole 98 in the support component 32.The lower limb in hole 98 is used for supporting the lower flat surfaces 158 of door bolt parts 116, thus the weight of the user on the weight of supporting strut pipe 93 and the vehicle seat 42.This geometric combined result of the lower limb in door bolt parts 116, tooth bar 100 and hole 98 makes this mechanism become a kind of self-locking mechanism, and wherein along with the increase of the load on the vehicle seat 42, this door bolt or lock effect are with grow.

Fig. 7 is combined the preferred embodiment that shows seat post assembly 160 with Fig. 8.Assembly 160 shown in Figure 7 comprises seat post 93, tooth bar 100 and annular element 96.In addition, seat post assembly 160 also comprises metallic plate 162 and the guide seat 166 for supporting seat 42.Guide seat 166 is assemblied in the bottom of seat post 93, and is preferably Unitarily molded plastic part.Bottom 170 in guide seat 166 is equipped with polyrubber buffer 168, thereby as shown in Figure 8 when seat post 93 is moved to the extreme lower position that supports on 32,93 pairs of seat post of buffering seat post support the impact of 32 bottom surface 172.Integrated with the bottom 170 of guide seat 166 is a pair of vertical load-bearing

surface

174 and 176 and a pair of arm of stability 178 and 180.The arm of

stability

178 and 180 is configured to when guide seat is inserted seat post and supported 32, and this arm of

stability

178 and 180 is inwardly compressed, and jointly provides smooth motion for what support seat post 93 in 32 than lower part with load-bearing surface 174 and 176.In addition, the arm of stability 180 also comprises outside protuberance or retainer 182, and it cooperates with the hole 184 that is arranged on the seat post support component 32 shown in Figure 8.This has just been avoided the user unintentionally seat post 93 to be extracted from supporting 32 when promoting vehicle seat 42.

Adjustable seat mechanism 24 has the function of anti-reversing ratch mechanism.Usually, in these cases, when the user is sitting on the vehicle seat 42, because two horizontal surface 106 in the tooth 104 of the flat surfaces 148 of door bolt 116 tooth section 146 and tooth bar 100 engages, and surface 158 lower limbs near hole 98 can not move downward so that vehicle seat 42 is locked.Spring 118 biased downward release levers 138 make it enter the normal position.The vehicle seat 42 if user wishes to raise then only needs to pull a cart seat, makes seat mechanism 24 produce ratcheting upwards.In the process that this ratcheting makes progress, 150 of the inclined surfaces of the tooth section 146 of door bolt 116 need to slide the next lower inclined surface 108 through the tooth 104 of tooth bar 100.When the vertical position that arrives expectation, vehicle seat 42 will resemble described above locked.If the user wishes to reduce vehicle seat 42, then only need the release lever 138 of connecting shaft component 112 is upwards drawn, like this so that fasten 116 bias voltages that overcome spring 118 with a bolt or latch and rotate to the rear portion of axle 130, subsequently, so that the flat surfaces 148 of the tooth section 146 of door bolt parts 116 break away from and the engaging of the horizontal surface 106 of the tooth 104 of rackwork 100.The amount of exercise of the ear shape part 136 of connecting shaft component 112 by making progress with restriction handle 138 near the detent 128 that is formed on 110 li on U-shaped support.In case arrive desired vertical position, release lever 138, so spring 118 will make door bolt parts 116 rotate forward, and vehicle seat 42 will resemble before illustrated in position locked.

Because the nearer tooth 104 in interval provides the height that is approximately half inch degree of regulation for vehicle seat 42, therefore adjustable seat mechanism 24 is so that the user can choose optimum vehicle seat position.Seat mechanism 24 also provides the method for regulating especially easily the vehicle seat height for the user.All these only need vehicle seat 42 is upwards drawn.As for reduction, also only need to promote release lever 138 door bolt parts 116 are disengaged with tooth bar 100.Regulate except more accurate vehicle seat, mechanism 24 also has such benefit, that is, allow the user only to stand in up-down adjustment vehicle seat 42 on the pedal 18, and the seat 42 or reduce vehicle seat 42 with release lever 138 of not needing to pull a cart.The user needn't get off to extract a pin from installing 10 as the vehicle seat governor motion of regulating other types.

Fig. 9 shows the second stationary exercise bicycle device 200, and it comprises the many basic structural components in the first stationary bicycle 10, comprising control panel 12, a left side and right-hand tread plate 18 and 20, and vehicle seat 42.But, different from the first embodiment of above-described seat mechanism 42 is, bicycle 200 comprises and a pair ofly is labeled as 210 governor motion (in order to describe effect), but this governor motion make user's in the vertical direction up and down and the equal adjustable car seat in front and back on the horizontal direction.Although be not essential in level and equal can the adjusting concerning Exercycle of vertical direction preferably like this.

Fig. 9-14 shows the preferred embodiment that is labeled as 212 vertical seat mechanism for vertical stationary exercise bicycle 200.In the embodiment of this vertical device 212, plate 214 is connected to vehicle seat by a plurality of securing members 216, and is connected with seat post 218.Preferably, seat post 218 is aluminiums of the extrusion modling that can slide up and down in being fixed in the vertical stay pipe 220 of framework 12.What be connected in stay pipe 220 rear sides is tooth bar 222.Be labeled as 224 bolt mechanism and be installed in the seat post 218, in this preferred embodiment, this bolt mechanism 224 comprises door bolt parts 226, connecting rod 228 and release lever 230.Release lever 230 is pivotally connected to seat post 218 end backwards by pin 332; Connecting rod 228 is connected with the middle part of release lever 230 by pin 234; Door bolt parts 226 are pivotally connected to connecting rod 228 by pin 236, and by door bolt pivot pin or the rotating shaft 238 that is fixed on successively on the seat post 218 its middle part are pivotally connected on the seat post 218.In the embodiment of this seat mechanism 212, tooth bar 222 disposes one group of tooth 240, and wherein each tooth comprises composition surface 242, and this surface is configured to abut 244 the composition surface of being labeled as on the door bolt parts 226.As shown in figure 14, thus torsionspring 246 can be used for bias voltage door bolt parts keeps itself and the engaging of tooth 240.Door bolt pivot pin 238 is supported on the seat post 218 by mounting structure, and the part 248 of this mounting structure is shown in Figure 14.

In order to operate seat mechanism 212, user's handle 230 that can make progress, thus this handle pivots around pin 232 and connecting rod 228 is lifted and will fasten engaging of tooth 240 on parts 226 rotation disengagings and the tooth bar 222.Under the effect of user's weight, seat post 218 freely moves down in stay pipe 222.Like this, the user can only reduce vehicle seat 42 by lifting handle 230.When handle was released, spring 246 was back to tooth 240 on the tooth bar 222 door bolt parts 226 and engages, thereby prevention seat post 218 and vehicle seat 42 are along stay pipe 220 down slidings.Because tooth 240 is configured to match with door bolt parts 226, thereby can be used as the work of anti-reversing ratch mechanism in the direction that makes progress, in order to promote vehicle seat 42, the user only needs only upwards to lift vehicle seat 42.

Figure 15-19 and Figure 10 and 11 show the preferred embodiment that is labeled as 312 horizontal seat mechanism that is used in the vertical stationary exercise bicycle 200.In this embodiment, vehicle seat 42 is fixed on vehicle seat slidably and is supported on 318 the upper tabular surface 316 by a plurality of securing members of 314 of being labeled as.Vehicle seat supports 318 and disposes right slide unit 320 and left slide unit 324, this right slide unit 320 has the almost circular cross section from 322 beginnings of lower flat surfaces to downward-extension, and this left slide unit 324 is configured to the antelabium that also begins to downward-extension from described lower flat surfaces 322.In addition, the first loading material 326 surrounds right slide unit 320, and the second loading material 328 covers the inner surface of left slide unit 324.A pair of downward axle supports

extension

330 and 332 and also is configured in the vehicle seat support 318.Fixed reception structure 334 is fixed to the top of seat post 218.The size that is arranged on the tubular portion 338 that receives structure 334 right sides is configured to be suitable for receiving right slide unit 320 and its loading material 326, and the size that is arranged on the U-shaped part 340 that receives structure 334 left sides is configured to be suitable for receiving left slide unit 324 and its loading material 328.This arrangement so that vehicle seat support 318 and vehicle seat can move forward and backward along the top of seat post 218.

In order to keep the position of vehicle seat 42 on seat post 218, the tooth bar 342 with tooth 344 of one group of basic rectangle is that 348 securing member is installed on the upper surface 346 that receives structure 334 by a group echo.Ratchet 350 is installed in rotation on

support

330 and 332 by the axle 352 that engages with tooth 344.Handle 354 is operably connected with ratchet 350, simultaneously also by axle 356 rotating

support

330 and 332 of being mounted to.Ball-and-socket type device 358 is used for handle 354 is connected to ratchet 350, so that when the user makes progress handle 354, this ball-and-socket type device 358 is rotated down around pivot or

axle

352 and 356, thus engaging ratchet 350 disengagings and tooth bar 342.In case ratchet 350 breaks away from and the engaging of tooth bar 342, it is freely mobile in the horizontal direction along receiving structure 334 that slidably seat post 318 just can be crossed the top of seat post 218, thus for vehicle seat 42 provide can the front and back adjusting ability.A kind of method that stops vehicle seat 42 to move forward and backward after handle 354 discharges is that bias mechanism is set, as is connected to

axle

352 or 356 and is labeled as 360 torsionspring on one of them, thus with partial pressure on ratchet 350, force it to turn back in the tooth bar 342.The operation of seat mechanism 312 as shown in figure 18, wherein handle 354 is upwards lifted so that ratchet 350 has broken away from and the engaging of tooth bar 342, in Figure 19, handle is released, so that ratchet 350 engages with tooth bar 342 again.

Claims

1. seat mechanism that is used for having the stationary exercise bicycle of framework, this seat mechanism comprises:

Be fixed on the stay pipe on the described framework;

The first tooth bar, it disposes a plurality of teeth that are fixed in the described stay pipe;

Seat post, it is fixed in the described stay pipe with mobile substantially vertically;

Bolt mechanism, it comprises the door bolt parts, the first release lever and connecting rod, described the first release lever is fixed to the top of described seat post pivotally, described connecting rod is positioned at described seat post, and in described seat post, be connected to described the first release lever at its upper end pivot, and be connected to described door bolt parts at its lower end pivot, wherein said tooth and described door bolt parts are configured to form ratch mechanism, thereby so that, moving downward of described vehicle seat is prevented from when described door bolt parts and described indented joint, and the user upwards lifts described the first release lever can make described connecting rod lift, so that described door bolt parts are disengaged to allow described vehicle seat to move downward from described tooth, and wherein need not be disengaged the described vehicle seat that to move up from described tooth by described door bolt parts;

Saddle assembly, it is fixed to described seat post above described the first release lever, and is suitable for allowing the motion of the limited at least basic horizontal of described vehicle seat, and wherein said saddle assembly comprises:

Be fixedly installed to the reception structure of described seat post;

The second tooth bar, it comprises the upwardly extending a plurality of teeth that are fixed to described reception structure;

Vehicle seat supports, and itself and described reception structural engagement are used for moving with respect to described reception structure level;

Be fixed to the vehicle seat that described vehicle seat supports;

Ratchet, described ratchet are rotatably fixed to described vehicle seat and support, and are configured to rotate to engage the upwardly extending tooth on described the second tooth bar, thereby can stop the described horizontal movement of described vehicle seat support; With

The second release lever, this second release lever is operably connected to described ratchet, can allow the user that described ratchet is engaged with described the second tooth bar and described ratchet is disengaged from described the second tooth bar.

2. the pivot middle part that is connected to described the first release lever and pivot and be connected to described door bolt parts of seat mechanism as claimed in claim 1, wherein said connecting rod utilization pin.

3. seat mechanism as claimed in claim 1, wherein said the first release lever direction is extended forward from described vehicle seat, and described the second release lever extends back from described vehicle seat.

4. seat mechanism as claimed in claim 1, wherein said the second release lever pivots and is connected to described vehicle seat support and is operably connected to described ratchet, so that moving upward of described the second release lever causes described ratchet and described the second tooth bar to be disengaged, thereby allow the described horizontal movement of described vehicle seat.

5. seat mechanism as claimed in claim 4, wherein said ratchet is operably connected to described the second release lever by the ball-and-socket type device.

6. seat mechanism as claimed in claim 1, wherein said vehicle seat supported configurations has at least one slide unit, and described reception structure is configured to receive described slide unit.

7. seat mechanism as claimed in claim 6, wherein said slide unit are configured to have and are roughly circular cross section, described reception structure dispose be roughly tubulose parts to receive described slide unit.

8. seat mechanism as claimed in claim 7, wherein said slide unit is configured to have lip portion, described reception structure dispose be roughly U-shaped parts to receive described slide unit.

9. seat mechanism as claimed in claim 1, wherein said the first release lever is rotatably fixed to described seat post end backwards by a pin, and is fixed to described connecting rod by the second pin that is positioned at described the first release lever middle part.

10. seat mechanism as claimed in claim 9 also comprises the biasing member that is fixed on the described seat post, and this biasing member can keep engaging of described door bolt parts and described the first tooth bar effectively.

11. seat mechanism as claimed in claim 10, wherein: described biasing member is fixed to described door bolt parts.

12. seat mechanism as claimed in claim 11, wherein: described door bolt parts are fixed on the described seat post by pivot pin, and described biasing member operationally is fixed to described pivot pin.

13. seat mechanism as claimed in claim 12, wherein: described biasing member comprises torsionspring.