CN208198556U - A kind of push-rod assembly and perambulator - Google Patents

Abstract

The utility model relates to a kind of push-rod assemblies, it includes the first bar and the second bar, second bar has the rod cavity extended along its axial direction, first bar can slide in the rod cavity of the second bar, push-rod assembly further includes set on the locking mechanism for locking the two relatively between the first bar and the second bar, it can be by the control mechanism of locking mechanism locking and unlocking, locking mechanism includes locking piece and multiple lockholes, control mechanism includes motion bar, the first driving section is formed on motion bar, second driving section, locking piece includes tapered end, first auxiliary section, second auxiliary section, its first bar of the push-rod assembly of the utility model and the second bar are under the mating reaction of locking mechanism and control mechanism, the relative position of guarantee the first bar and the second bar that can be effectively stable, pushing away sky when can be avoided user's hand push suddenly causes centre of body weight unstable, Security risk occurs, improves the usage experience of user.

Description

A kind of push-rod assembly and perambulator

Technical field

The utility model relates to a kind of push-rod assembly and perambulators.

Background technique

Currently, children trolley has been relatively conventional child utensil, in the prior art for convenience of the promotion of user, push rod It is the essential element of children trolley.It for convenience of transport, carries, most children trolley can fold, but often due to various reasons Limitation, much cart in a folded configuration, more or less can all there is situations such as volume is big, inconvenient to carry.In addition, existing The use length of push rod in a state of use be all designed to it is constant unadjustable, this seriously affected user use body It tests.Push rod length adjustable children trolley when having had use based on this, on existing market, and for convenience of transporting, it pushes away Bar is provided with detachable structure, but the adjustable push rod of length in the prior art, due to limitation (its use elasticity of its structure Return mechanism of the part as locking piece and anti-falling piece), vehicle body shake or shake when, can not by push rod it is stable be maintained at use Length, equally influence usage experience；For existing structure there is also some potential safety problems, when adult's cart, may push away sky, The accidents such as lead to centre of body weight unstable and fall down in turn；In addition, children trolley handle is equipped with the soft sheath held, using In be easily damaged, sheath damage is inconvenient to repair, and can only replace, existing cart is since push rod is non-dismountable with vehicle frame, sheath When damage, need to replace new car for client, business burden is big.

Summary of the invention

The technical problem to be solved by the present invention is to provide a kind of push-rod assembly, the entire length of the push-rod assembly can Adjust, and using when can be stably held in required for using length.

In order to solve the above-mentioned technical problem, a kind of technical solution that the utility model uses is:

A kind of push-rod assembly comprising the first bar and the second bar, the second bar have the rod cavity extended along its axial direction, the One bar can slide in the rod cavity of the second bar, push-rod assembly further include set between the first bar and the second bar for will The control mechanism of locking mechanism locking and unlocking, locking mechanism can be included along first by the locking mechanism of the opposite locking of the two Locking piece that bar radially slided be arranged on the first bar, the multiple lockholes being axially distributed in along the second bar on the second bar, control Mechanism includes the motion bar being set in the first bar that can axially slide along the first bar, and the side backwards to lockhole of motion bar has First driving section, the side towards lockhole of motion bar have the second driving section, and locking piece includes cooperating to realize locking with lockhole Tapered end, positioned at motion bar the first driving section where side the first auxiliary section, positioned at motion bar the second driving section where side The second auxiliary section, the first driving section and the first auxiliary section corresponding matching be arranged, and the second driving section is corresponding with the second auxiliary section to match Setting is closed, so that motion bar is able to drive tapered end close to or far from lockhole and then realization locks or unlocks when sliding motion bar, And when tapered end is mutually locked with lockhole, motion bar can be such that tapered end tends to remain in lockhole.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and the first driving section has along motion bar The first face and the second face that length direction is connected, the first face is axially extending along the first bar, and the second face is inclined surface, works as lock When determining mechanism and being in the lock state, the first auxiliary section of locking piece can offset with the first face, when locking mechanism is in lock state When switching between unlocked state, the first auxiliary section of locking piece is slided on the second surface.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and the second driving section has along motion bar Third face that length direction is connected, fourth face, third face is axially extending along the first bar, and fourth face is inclined surface；Second Auxiliary section has the plane being connected and inclined surface, and the plane of the second auxiliary section is along the axially extending of the first bar, when locking machine When structure is in the lock state, the plane of the second auxiliary section can offset with third face, when locking mechanism is in lock state and unlock When switching between state, fourth face sliding opposite with the inclined surface of the second auxiliary section.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and motion bar has bending section, bending section The surface of opposite sides is respectively formed with the first driving section and the second driving section.

Preferably, push-rod assembly further includes being used to prevent the two along axial mutually de- set between the first bar and the second bar From escapement, escapement include being arranged on the first bar of being radially slided along the first bar and there is clamping position and de- Off normal the anti-falling piece set, be fixedly arranged on the second bar and cooperate the blocking portion kept out with anti-falling piece, motion bar backwards to blocking portion Side has a third driving section, and the side towards blocking portion of motion bar has the 4th driving section, and anti-falling piece includes and blocking portion Cooperation contradicts to which realization prevents the abutting portion of the first bar and the disengaging of the second bar, positioned at side where the third driving section of motion bar Third auxiliary section, positioned at motion bar the 4th driving section where side the 4th auxiliary section；

When anti-falling piece is in clamping position, abutting portion offsets with blocking portion, and escapement can prevent the first bar and the Two bars are detached from, and when anti-falling piece is in disengaging configuration, abutting portion and blocking portion are detached from and contradict, and the first bar and the second bar can be mutual It is detached from；

Third driving section and third auxiliary section corresponding matching are arranged, and the 4th driving section is set with the 4th auxiliary section corresponding matching It sets, so that motion bar is able to drive anti-falling piece and moves to clamping position or disengaging configuration when sliding motion bar,

And when anti-falling piece moves to clamping position, when abutting portion and blocking portion are inconsistent, motion bar tends to prevent anticreep Part movement, makes abutting portion and blocking portion be maintained at conflict state, and then the first bar and the second bar is prevented to be detached from.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and third driving section has along motion bar The 5th face and the 6th face that length direction is connected, the 5th face is along the axially extending of the first bar, and the 6th face is inclined surface, when anti- When de- part moves to clamping position, third auxiliary section can offset with the 5th face, when anti-falling piece is in clamping position and disengaging configuration Between when moving, third auxiliary section is slided on the 6th face.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and the 4th driving section has along motion bar The 7th face that length direction is connected, octahedral, along the axially extending of the first bar, octahedral is inclined surface in the 7th face；4th There is the plane being connected and inclined surface, the plane of the 4th auxiliary section to work as anti-falling piece along the axially extending of the first bar for auxiliary section When moving to clamping position, the plane of the 4th auxiliary section can offset with the 7th face, when anti-falling piece in clamping position and is detached from position When being moved between setting, octahedral sliding opposite with the inclined surface of the 4th auxiliary section.

Preferably, the axial direction of the length direction of motion bar and the first bar is consistent, and motion bar has bending section, bending section The surface of opposite sides is respectively formed with third driving section and the 4th driving section.

Preferably, the end of the second bar is fixedly connected with blocking set, stops set part to be located in the second bar rod cavity, and part The second bar is stretched out, the end positioned at the second bar rod cavity part of set is stopped to constitute blocking portion.

Preferably, control mechanism further includes the control knob being set on the first bar, the traction for connecting control knob with motion bar Rope, the reply part for being intended to that motion bar is driven to return back to original state on the first bar.

The utility model further relates to a kind of perambulator comprising the frame for baby cart with unfolded state and folded state, the child Vehicle carriage includes the push-rod assembly that the utility model is described, wherein the second bar is to be connected with other rod pieces on frame for baby cart Vehicle frame bar, the first bar is the pulling handle rod being removably mounted on vehicle frame bar.

Since above-mentioned technical proposal is used, the utility model has the advantage that compared with prior art

The push-rod assembly of the utility model, the first bar and the second bar are removably arranged, and damage when holding sheath on cart It is bad, it is only necessary to the first bar be dismantled from the second bar, more renewed, replacement is convenient, and replacement cost is low, damages in sheath When, without entirely replacing new car for client, reduce business burden；In addition, when push rod total length is adjusted to its needs by user Appropriate length when, and after locking piece is plugged into lockhole, supported by the hardness between the plane and third face of the second auxiliary section Touching, very stable be plugged in of locking piece is plugged in lockhole, without encounter vehicle body vibration etc. in special circumstances from Abjection in lockhole causes the first bar and the opposite unnecessary displacement of generation of the second bar；The utility model need to will only be controlled in replacement Button pressing processed in place, makes anti-falling piece be separated from anticreep confined planes, then pulls out the first bar from the second bar, very just Just.

Detailed description of the invention

Fig. 1 is the radial schematic cross-sectional view (locking mechanism and escapement lock) of the utility model；

Fig. 2 is the radial schematic cross-sectional view (locking mechanism unlock, escapement locking) of the utility model；

Fig. 3 is the radial schematic cross-sectional view (locking mechanism unlock is unlocked with escapement) of the utility model；

Fig. 4 is the radial schematic cross-sectional view (the first bar is mutually dismantled with the second bar and separated) of the utility model

Fig. 5 is the radial schematic cross-sectional view of the motion bar of the utility model；

Fig. 6 is the schematic perspective view of the perambulator of the utility model:

Wherein: 1, the first bar；2, the second bar；3, locking piece；30, lockhole；31, tapered end；32, the first auxiliary section；331, The plane of two auxiliary sections；332, the inclined surface of the second auxiliary section；4, anti-falling piece；40, stop set；401, blocking portion；41, it contradicts Portion；42, third auxiliary section；431, the plane of the 4th auxiliary section；432, the inclined surface of the 4th auxiliary section；5, motion bar；51, first Face；52, the second face；53, third face；54, fourth face；55, the 5th face；56, the 6th face；57, the 7th face；58, octahedral；6, it controls Button processed；7, traction rope；8, part is replied.

Specific embodiment

As shown in figure 1, figure 2, figure 3, figure 4 and figure 5, a kind of push-rod assembly comprising the first bar 1 and the second bar 2, the second bar 2 With the rod cavity extended along its axial direction, the first bar 1 can slide in the rod cavity of the second bar 2, push-rod assembly also wraps It includes the locking mechanism for locking the two relatively being set between the first bar 1 and the second bar 2, be set to the first bar 1 and the second bar 2 Between for both preventing the escapement being mutually disengaged along axial direction, can be by locking mechanism and escapement locking reconciliation The control mechanism of lock,

Locking mechanism includes locking piece in the locking piece 3(this example being arranged on the first bar 1 radially slided along the first bar 1 Including with lockhole 30 cooperate realize locking tapered end 31, positioned at motion bar the first driving section where side the first auxiliary section 32, Positioned at the second auxiliary section of side where the second driving section of motion bar), multiple locks for being axially distributed in along the second bar on the second bar Hole 30；

Escapement include being arranged on the first bar 1 of being radially slided along the first bar 1 and there is clamping position and disengaging In anti-falling piece 4(this example of position, anti-falling piece 4 includes contradicting to realize and prevent the first bar 1 and second with the cooperation of blocking portion 401 Abutting portion 41 that bar 2 is detached from, positioned at the third auxiliary section 42 of side where the third driving section of motion bar 5, positioned at the of motion bar 4th auxiliary section of side where four driving sections), be fixedly arranged on the second bar 2 and cooperate the blocking portion 401 kept out with anti-falling piece 4, when When anti-falling piece 4 is in clamping position, abutting portion 41 offsets with blocking portion 401, and escapement can prevent the first bar 1 and the second bar 2 are detached from, and when anti-falling piece 4 is in disengaging configuration, abutting portion 41 and blocking portion 401 are detached from and contradict, 2 energy of the first bar 1 and the second bar Enough it is mutually disengaged；

Control mechanism includes along the axial motion bar 5 being set in the first bar 1 that can be slided of the first bar 1, the back of motion bar 5 There is the first driving section to the side of lockhole 30, the side towards lockhole 30 of motion bar has the second driving section；Motion bar 5 There is third driving section backwards to the side of blocking portion 401, the side towards blocking portion 401 of motion bar 5 has the 4th driving section.

In this example, the first driving section and 32 corresponding matching of the first auxiliary section are arranged, the second driving section and the second auxiliary section pair It should be equipped with；Third driving section and third auxiliary section corresponding matching are arranged, the 4th driving section and the 4th auxiliary section corresponding matching Setting, so that motion bar 5 is able to drive tapered end 31 close to or far from lockhole 30 and then realizes locking or solution when sliding motion bar 5 Lock, and, when tapered end 31 is locked with 30 phase of lockhole, motion bar 5 can be such that tapered end 31 tends to remain in lockhole 30.

Moreover, but also motion bar 5 is able to drive anti-falling piece 4 and moves to clamping position or be detached from position when sliding motion bar 5 It sets, and, when anti-falling piece 4 moves to clamping position, when abutting portion 41 and blocking portion 401 are inconsistent, motion bar 5 tends to prevent anti- De- part 4 moves, and abutting portion 41 and blocking portion 401 is made to be maintained at conflict state, and then the first bar 1 and the second bar 2 is prevented to be detached from.

Specifically: the axial direction of the length direction of motion bar 5 and the first bar 1 is consistent, and the first driving section has along motion bar 5 Length direction the first face 51 and the second face 52 that are connected, the first face 51 is axially extending along the first bar 1, and the second face 52 is Inclined surface, when locking mechanism is in the lock state, the first auxiliary section 32 of locking piece 3 can offset with the first face 51, work as lock When determining mechanism and switching between lock state and unlocked state, the first auxiliary section 32 of locking piece 3 is slided on the second face 52, this In example, the first auxiliary section 32 is the pin shaft being fixed on locking piece 3；Second driving section has the length side along motion bar To be connected third face 53, fourth face 54, third face 53 is axially extending along the first bar 1, fourth face 54 be inclined surface；The There is the plane being connected and inclined surface, the plane 331 of the second auxiliary section to work as lock along the axially extending of the first bar for two auxiliary sections When determining mechanism and being in the lock state, the plane 331 of the second auxiliary section can offset with third face 53, when locking mechanism is in locking shape When switching between state and unlocked state, the inclined surface 332 of fourth face 54 and the second auxiliary section is opposite to be slided.

Further, third driving section has the 5th face 55 and the 6th face being connected along the length direction of motion bar 56, the 5th face 55 is axially extending along the first bar 1, and the 6th face 56 is inclined surface, when anti-falling piece 4 moves to clamping position, Third auxiliary section can offset with the 5th face 55, when anti-falling piece 4 moves between clamping position and disengaging configuration, third cooperation Portion is slided on the 6th face 53, and in this example, third auxiliary section is the pin shaft being fixed on anti-falling piece 4；The length of motion bar 5 Direction and the first bar 1 it is axial consistent, the 4th driving section has the 7th face 57 being connected along the length direction of motion bar, the Octahedral 58, the 7th face 57 is axially extending along the first bar 1, and octahedral 58 is inclined surface；4th auxiliary section, which has, to be connected Plane and inclined surface, the plane 431 of the 4th auxiliary section is along the axially extending of the first bar, when anti-falling piece 4 moves to clamping position When, the plane 431 of the 4th auxiliary section can offset with the 7th face 57, when anti-falling piece 4 is transported between clamping position and disengaging configuration When dynamic, the inclined surface 432 of octahedral 58 and the 4th auxiliary section is opposite to be slided.

In this example, motion bar 5 has bending section, and the surface of the side in the opposite sides of bending section is formed with the first transmission Portion and third driving section, another side surface are formed with the second driving section and the 4th driving section.The end of second bar 2 is fixedly connected with Stop set 40, stop 40 parts of set to be located in 2 rod cavity of the second bar, and the second bar 2 is stretched out in part, stop set 40 is located at the second bar The end of 2 rod cavity parts constitutes blocking portion 401.Control mechanism further include control knob 6 on the first bar 1, by control knob 6 with The traction rope 7 that motion bar 5 connects, the reply part 8 for being intended to that motion bar 5 is driven to return back to original state on the first bar 1.

In addition, in this example the tool of control knob 6 there are two gear, i.e., wherein a gear when, manpower presses control knob in place Afterwards, the distance that control knob is inside contracted into the body of rod is smaller, at this point, the distance that drives motion bar mobile by traction rope 7 of control knob 6 compared with It is small, it only will drive 3 unlocking movement of locking piece, being moved without will drive anti-falling piece 4, reference can be made to Fig. 2；When control knob 6 is at another When gear, after manpower presses control knob in place, the distance that control knob is inside contracted into the body of rod is then larger, at this point, control knob 6 is by leading The distance that messenger 7 drives motion bar mobile also will increase, and not only will drive 3 unlocking movement of locking piece, also will drive the fortune of anti-falling piece 4 It moves and is detached from (referring to Fig. 3) with blocking portion, at this point, the first bar and the second bar can mutually dismantle disengaging (referring to fig. 4).

In addition, the utility model further relates to a kind of perambulator (referring to Fig. 6) comprising with unfolded state and folded state Frame for baby cart, the frame for baby cart include the push-rod assembly that the utility model is described, wherein the second bar 2 be on frame for baby cart The vehicle frame bar that other rod pieces are connected, the first bar 1 are the pulling handle rod being removably mounted on vehicle frame bar.

In conclusion the push-rod assembly of the utility model, the first bar and the second bar are removably arranged, when hand on cart Hold sheath damage, it is only necessary to the first bar be dismantled from the second bar, more renewed, replacement is convenient, and replacement cost is low, is protecting When set damage, without entirely replacing new car for client, business burden is reduced；In addition, when push rod total length is adjusted to by user When its appropriate length needed, and after locking piece is plugged into lockhole, by between the plane and third face of the second auxiliary section Hardness contradicts, and very stable be plugged in of locking piece is plugged in lockhole, without encountering the special feelings such as vehicle body vibration Deviate from out of lockhole under condition, causes the first bar and the opposite unnecessary displacement of generation of the second bar；The utility model is in replacement, only Control knob need to be pressed in place, so that anti-falling piece is separated from anticreep confined planes, then pull out the first bar from the second bar, it is non- It is often convenient.

Further, by between the plane and the 7th face of the 4th auxiliary section hardness contradict, enable anti-falling piece very It is stable to keep out clamping with blocking portion, without causing anti-falling piece to support with blocking portion disengaging in special circumstances encountering vehicle body vibration etc. Gear, promotes the anticreep performance of escapement.Its first bar of the push-rod assembly of the utility model and the second bar are in locking mechanism and control Under the mating reaction of mechanism processed, the relative position of guarantee the first bar and the second bar that can be effectively stable can be avoided user Pushing away sky when (adult) hand push suddenly causes centre of body weight unstable, and security risk occurs, improves the usage experience of user.

The utility model is described in detail above, its object is to allow the personage for being familiar with this field technology can be much of that It solves the content of the utility model and is implemented, do not limit the protection scope of the present invention, and the utility model The above embodiments are not limited to, equivalent change or modification made by all Spirit Essences according to the present utility model should all cover Within the protection scope of the utility model.

Claims (10)

1. a kind of push-rod assembly comprising the first bar and the second bar, second bar have the rod cavity extended along its axial direction, First bar can slide in the rod cavity of second bar, the push-rod assembly further include be set to first bar and Between second bar for by the locking mechanism of the opposite locking of the two, can be by the control machine of the locking mechanism locking and unlocking Structure, the locking mechanism include the locking piece being arranged on first bar radially slided along first bar, along described Two bars are axially distributed in multiple lockholes on second bar, it is characterised in that: the control mechanism includes along first bar The side backwards to the lockhole of the motion bar being set in first bar that can axially slide, the motion bar has first The side towards the lockhole of driving section, the motion bar has the second driving section, and the locking piece includes and the lockhole Cooperation realize locking tapered end, positioned at the motion bar the first driving section where side the first auxiliary section, be located at the activity Second auxiliary section of side where second driving section of bar, first driving section and the first auxiliary section corresponding matching are arranged, described Second driving section and the second auxiliary section corresponding matching are arranged, and when so that sliding the motion bar, the motion bar is able to drive institute Tapered end is stated close to or far from the lockhole and then realization locks or unlocks, and, when the tapered end is mutually locked with lockhole, the work Lever can be such that the tapered end tends to remain in lockhole.

2. push-rod assembly according to claim 1, it is characterised in that: the length direction of the motion bar and first bar It is axial consistent, first driving section has the first face and the second face being connected along the length direction of the motion bar, First face is axially extending along first bar, and second face is inclined surface, when the locking mechanism is in locking When state, the first auxiliary section of the locking piece can offset with first face, when the locking mechanism is in the locking shape When switching between state and unlocked state, the first auxiliary section of the locking piece is slided on second face.

3. push-rod assembly according to claim 1, it is characterised in that: the length direction of the motion bar and first bar It is axial consistent, second driving section has the third face being connected along the length direction of the motion bar, fourth face, institute Third face is stated along the axially extending of first bar, the fourth face is inclined surface；Second auxiliary section, which has, to be connected Plane and inclined surface, the plane of second auxiliary section is along the axially extending of first bar, at the locking mechanism When lock state, the plane of second auxiliary section can offset with the third face, when the locking mechanism is in the lock When determining to switch between state and unlocked state, fourth face sliding opposite with the inclined surface of the second auxiliary section.

4. push-rod assembly according to claim 1, it is characterised in that: the length direction of the motion bar and first bar It is axial consistent, and the motion bar has a bending section, and the surface of the opposite sides of the bending section is respectively formed with described the One driving section and the second driving section.

5. push-rod assembly according to any one of claim 1 to 3, it is characterised in that: the push-rod assembly further includes setting The escapement for preventing the two to be mutually disengaged along axial direction between first bar and the second bar, the escapement packet Include anti-falling piece along being arranged on first bar of radially sliding of first bar and that there is clamping position and disengaging configuration, It is fixedly arranged on second bar and cooperates the blocking portion kept out with the anti-falling piece, the blocking portion backwards of the motion bar Side has third driving section, and the side towards the blocking portion of the motion bar has the 4th driving section, the anti-falling piece Including contradicting to realize the abutting portion for preventing the first bar and the second bar to be detached from blocking portion cooperation, being located at the motion bar Third driving section where side third auxiliary section, positioned at the motion bar the 4th driving section where side the 4th auxiliary section；

When the anti-falling piece is in clamping position, the abutting portion offsets with blocking portion, and the escapement can prevent institute It states the first bar and the second bar is detached from, when the anti-falling piece is in disengaging configuration, the abutting portion and blocking portion are detached from and contradict, institute Stating the first bar and the second bar can be mutually disengaged；

The third driving section and third auxiliary section corresponding matching are arranged, the 4th driving section and the 4th auxiliary section corresponding matching Setting, when so that sliding the motion bar, the motion bar is able to drive the anti-falling piece and moves to clamping position or be detached from position It sets,

And when anti-falling piece moves to clamping position, when the abutting portion and blocking portion are inconsistent, the motion bar tends to prevent Anti-falling piece movement, makes the abutting portion and the blocking portion be maintained at conflict state, and then prevents first bar and the Two bars are detached from.

6. push-rod assembly according to claim 5, it is characterised in that: the length direction of the motion bar and first bar It is axial consistent, the third driving section has the 5th face and the 6th face being connected along the length direction of the motion bar, 5th face is along the axially extending of first bar, and the 6th face is inclined surface, when the anti-falling piece moves to clamping When position, the third auxiliary section can offset with the 5th face, when the anti-falling piece in the clamping position and is detached from position When moving between setting, the third auxiliary section is slided on the 6th face.

7. push-rod assembly according to claim 5, it is characterised in that: the length direction of the motion bar and first bar It is axial consistent, the 4th driving section has the 7th face being connected along the length direction of the motion bar, octahedral, institute The 7th face is stated along the axially extending of first bar, the octahedral is inclined surface；4th auxiliary section, which has, to be connected Plane and inclined surface, the plane of the 4th auxiliary section is along the axially extending of first bar, when the anti-falling piece moves To when being clamped position, the plane of the 4th auxiliary section can offset with the 7th face, when the anti-falling piece is in the clamping When moving between position and disengaging configuration, the octahedral is opposite with the inclined surface of the 4th auxiliary section to be slided.

8. push-rod assembly according to claim 5, it is characterised in that: the end of second bar is fixedly connected with blocking It covers, blocking set part is located in the second bar rod cavity, and second bar is stretched out in part, and the blocking set is located at the second bar The end of rod cavity part constitutes the blocking portion.

9. push-rod assembly according to claim 1, it is characterised in that: the control mechanism further includes being set to first bar On control knob, be intended to described in drive by traction rope that the control knob is connect with motion bar, on first bar Motion bar returns back to the reply part of original state.

10. a kind of perambulator comprising the frame for baby cart with unfolded state and folded state, it is characterised in that: the perambulator vehicle Frame includes the push-rod assembly as described in any in claim 1 to 9, wherein second bar be on the frame for baby cart its The vehicle frame bar that his rod piece is connected, first bar are the pulling handle rod being removably mounted on the vehicle frame bar.