DE102016201379A1 - Stroller and associated backrest angle adjustment device - Google Patents

Abstract

A seat back angle adjusting device (30, 30 ') adapted for a stroller (100) comprises a fixing base (31, 31') and a driving base (32, 32 '), the fixing base (31, 31') a frame (10) is fixable, and the drive base (32, 32 ') with a backrest (20) is connected and with respect to the fixing base (31, 31') can rotate. The fixing base (31, 31 ') has at least two engagement grooves (310, 310'), the engagement grooves (310, 310 ') being arcuately arranged to form a multi-stage structure. The drive base (32, 32 ') has a locking element (320, 320') which engages with one of the engagement grooves (310, 310 '). The engagement groove (310, 310 ') and the locking member (320, 320') may engage with each other at a predetermined angle to thereby lock the drive base (32, 32 ') with respect to the fixing base (31, 31'). Thus, when the locking member (320, 320 ') disposed on the drive base (32, 32') engages with different engagement grooves (310, 310 ') of different stages, the angle of inclination of the seat back (20) with respect to the frame is (10) different.

Description

The present invention relates to a stroller and associated backrest angle adjustment device according to the preambles of claims 1 and 35.

In general, a stroller has a frame and a backrest. To provide sitting comfort to a baby in the stroller, the backrest of most stroller can rotate relative to the frame to adjust a tilt angle. Consequently, the stroller is normally equipped with a backrest angle adjustment device for adjusting the angle of inclination of the backrest. The state of the art can be applied to the U.S. Patent Number 6,830,254 , the Chinese Patent Application Number ZL200720171699.3 , the Chinese Patent Application Number ZL200820147287.0 and so on.

in the U.S. Patent Number 6,830,254 For example, a seat frame of a baby carriage is disposed on a leg unit, a seat back is pivotally connected to the seat frame so that the seat back can rotate with respect to the seat frame, and a positioning seat is disposed between the leg unit and the seat back. A first engagement member having a groove and a second engagement member having a pin are disposed on the positioning seat so that the seat back can be positioned at a predetermined angle with respect to the seat frame. To adjust the inclination angle of the seat back, a user operates a unlocked member to actuate a belt to pull the second engagement member to disengage it from the first engagement member. Consequently, the user can adjust the inclination angle of the seat back.

In the Chinese Patent Application ZL200720171699.3 a backrest of a stroller is supported by a drawstring and held at a tilt angle. The inclination angle of the backrest is adjusted by adjusting a length of the tension band, and a buckle device is used to fix the length of the tension band.

Moreover, in the Chinese Patent Application Number ZL200820147287.0 a backrest support of a stroller connected to a cross-brace. To adjust a reclining angle of the seat back support, a user operates a handle to control a positioning shutter to disengage from a positioning base via a link mechanism (for example, a cable). Consequently, the user can adjust the inclination angle of the seat back support. After the seat back support is adjusted to a desired angle, the user operates the handle to control the positioning latch to engage the positioning base so as to maintain the seat back support at a desired angle.

In the aforementioned prior art, the conventional stroller, which can adjust the inclination angle of the backrest, cumbersome and still has some disadvantages for further improvement. In order to solve the aforementioned problems, the manufacturers have gone to great lengths, but they did not develop suitable solutions. Moreover, the present products do not provide a suitable structure for solving the aforementioned problems. Therefore, it has heretofore been an important theme to develop an improved seat back angle adjusting device suitable for a stroller.

In this sense, it is an object of the present invention to provide a seat back angle adjusting device having a simple structure, an appropriate design and a multi-stage adjustment, and to provide a stroller equipped with a seat back angle adjusting device having a simple structure, an appropriate design and a multi-stage setting. whereby the aforementioned problems are solved.

The solution of this object is achieved by a backrest angle adjustment device according to claim 1 and a stroller according to claim 35. The dependent claims have advantageous developments of the invention to the content.

As will be more apparent from the following detailed description, the claimed seatback angle adjusting device is adapted for a stroller. The stroller comprises a frame and a backrest, wherein an angle of inclination of the backrest with respect to the frame is adjustable. The seat back angle adjusting device includes a fixing base and a drive base, wherein the fixing base is fixable on the frame, and the drive base is connectable with the seat back and can rotate with respect to the fixing base. The fixing base has at least two engagement grooves, wherein the engagement grooves are arranged arcuately to form a multi-stage structure. The drive base has a locking element which engages with one of the engagement grooves. The engaging groove and the locking member may be engaged with each other at a predetermined angle so as to lock the driving base with respect to the fixing base.

In addition, the claimed stroller comprises a frame, a backrest and the aforementioned backrest angle adjustment device. The angle of inclination of the backrest is adjustable with respect to the frame via the backrest angle adjustment device.

Further details, advantages and features of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings. It shows:

1 a schematic view illustrating a stroller, which is equipped with a backrest angle adjustment device according to a first embodiment of the invention;

2 an enlarged view showing the part A in 1 represents;

3 a schematic view showing the drive base and the tube in 2 are shown;

4 a partial perspective view showing the drive base and the tube in 3 are shown represents.

5 an exploded view showing the drive base and tube in 4 are shown;

6 a schematic view illustrating a stroller, which is equipped with a backrest angle adjustment device according to a second embodiment of the invention;

7 a schematic view showing the backrest angle adjustment device without the in 6 represents connecting element shown;

8th a schematic view showing the drive base and the tube in 7 are shown;

9 a schematic view showing the adjusting mechanism and the connecting element, in 2 are shown;

10 an enlarged view showing the in 7 represented part B; and

11 a schematic view illustrating the fixing base of the backrest angle adjusting device, which in 7 is shown.

There are several embodiments of the invention, which are described below with the accompanying drawings, wherein the same reference numerals in the drawings represent the same elements.

As in 1 and 6 shown comprises a stroller 100 the invention a frame 10 , a backrest 20 and a seatback angle adjusting device 30 where a tilt angle of the backrest 20 concerning the frame 10 is adjustable. The angle of inclination of the backrest 20 is regarding the frame 10 via the backrest angle adjustment device 30 adjustable, thus providing an angle adjustment for the backrest 20 to reach. To adjust the angle of the backrest 20 to achieve and stability for the stroller 100 upright are the backrest angle adjusters 30 on opposite sides of the frame 10 arranged symmetrically. The following are further 2 to 5 and 7 to 11 for describing the backrest angle adjusting devices in detail 30 used the invention.

In particular, ask 1 to 5 the seat back angle adjusters 30 according to a first embodiment of the invention, and 6 to 10 the seat back angle adjusters 30 according to a second embodiment of the invention.

First embodiment:

As in 1 and 2 shown, include the backrest angle adjustment devices 30 the invention, a Fixierbasis 31 and a drive base 32 where the fixation base 31 on the frame 10 is fixable, and the drive base 32 with the backrest 20 is connectable and with respect to the Fixierbasis 31 can turn. The fixation base 31 has at least two engagement grooves 310 on, with the engagement grooves 310 arcuately arranged to form a multi-level structure. The drive base 32 has a locking element 320 on, with one of the engagement grooves 310 engaged. The engagement groove 310 and the locking element 320 may engage each other at a predetermined angle, thus the drive base 32 regarding the fixation base 31 to lock. In the embodiment, in particular, five engagement grooves 310 on the fixation base 31 arranged, with the five engagement grooves 310 arcuate to form a five-step structure. When the locking element 320 with different engagement grooves 310 is engaged, is the drive base 32 at different angles with respect to the fixation base 31 fixable, so that the backrest 20 at different angles of inclination with respect to the frame 10 is positioned so as to provide an angle adjustment for the backrest 20 to reach. The number of engagement grooves 310 may be determined by a person of ordinary skill in the art according to embodiments of the invention under practical requirements, they will not be detailed here.

As mentioned above, the seat back angle adjustment device includes 30 the invention fixing base 31 on the frame 10 is fixable, and the drive base 32 that with the backrest 20 is connectable and with respect to the Fixierbasis 31 can rotate, and the engagement grooves 310 on the fixation base 31 are arranged arcuately arranged to form the multi-level structure. When the locking element 320 that on the drive base 32 is arranged, with different engagement grooves 310 various levels is engaged, therefore, the inclination angle of the backrest 20 concerning the frame 10 different in order to achieve the objectives of a multi-level approach, simple structure and appropriate design.

As in 2 and 3 illustrated, includes the backrest angle adjustment device 30 Furthermore, a connecting element 33 , wherein one end of the connecting element 33 with the drive base 32 and another end of the connecting element 33 with an actuating element 330 is connected to an engagement between the locking element 320 and the engagement groove 310 perform. The connecting element 33 is a rigid structure, so that the connecting element 33 the actuator 330 can support directly. A user can use the actuator 330 pull in a direction indicated by an arrow F1, which in 3 is shown. When the actuator 330 is pulled, drives the actuator 330 the connecting element 33 to move. When the connecting element 33 moves, drives the connector 33 the locking element 320 the drive base 32 on to from the engagement groove 310 disengage, thus the drive base 32 and the fixation base 31 to unlock. After unlocking the drive base 32 and the fixation base 31 the user can adjust the angle of inclination of the backrest 20 according to his / her needs. After completing the adjustment of the angle of inclination of the backrest 20 , Relieves the user releases the force in the direction of F1, so that the locking element 320 again with the engagement groove 310 engaged. Consequently, the adjustment of the angle of inclination of the backrest 20 completed. Because the locking element 320 with the engagement groove 310 about the cooperation between the actuator 330 and the connecting element 33 is engaged or disengaged (that is, both are locked together or unlocked from each other), the design is appropriate, the structure simple and the operation comfortable.

As in 3 and 4 illustrated, the seat back angle adjustment device 30 Further, an adjustment mechanism, wherein the adjustment mechanism is a support element 38 and a handle 39 having. One end of the support element 38 is pivotable with a pipe 21 the backrest 20 and another end of the support element 38 is pivotable with the handle 39 connected. The handle 39 is through the support element 38 supported. When the handle 39 is pulled, the pipes are 21 as a result of the action of the support element 38 folded.

As in 3 and 4 shown, the actuating element 330 a gripping area 331 , which protrudes outward, for a finger to pull on, and the handle 39 also has a gripping area 391 , which protrudes outward, for a finger to pull on to the actuator 330 and the handle 39 very good to operate.

Preferably, the connecting element 33 a rigid structure (for example, metal structure, rigid plastic structure, etc.), so that the connecting element 33 the actuator 330 can support.

Because the connecting element 33 the actuator 330 can independently support, are the connecting element 33 and the actuator 330 preferably arranged independently.

As in 2 to 4 shown, the drive base 32 Further, a drive element 34 on to the engagement between the locking element 320 and the engagement groove 310 perform, wherein the drive element 34 slidable on the pipe 21 the backrest 20 is arranged. The drive element 34 is with one end of the aforementioned connecting element 33 and another end of the connecting element 33 is with the aforementioned actuator 330 connected. When the actuator 330 is actuated, the actuating element 330 the drive element 34 directly over the connection of the connecting element 33 Press, so that the drive element 34 and the actuator 330 move together. When the drive element 34 slides, becomes the driving element 34 the locking element 320 Driven to engage with the engagement groove 310 to be engaged or disengage from this. In particular, when the actuator 330 is operated in the direction indicated by the arrow F1, which in 3 is shown, the locking element 320 from the engagement groove 310 disengaged. The arrangement of the drive element 34 Further, stability and convenience when operating the actuator 330 ensure the engagement between the locking element and the engagement groove 310 to control.

As in 2 to 5 As shown, the invention provides two ways of restricting the travel distance of the drive member 32 in front. The first restricting mode will be described below. The pipe 21 has a first retaining opening formed thereon 341 on that the drive element 34 corresponds, with the first Retaining opening 341 is elongated. The drive element 34 has a mounting hole formed thereon 342 on, that of the first retention opening 341 equivalent. The locking element 320 has a fixing opening formed thereon 343 on, the mounting hole 342 equivalent. The first pen 344 goes through the mounting hole 342 of the drive element 34 , the first retaining hole 341 of the pipe 21 and the fixing hole 343 of the locking element 320 therethrough. The first pen 344 holds the drive element 34 back to within the first retention opening 341 to glide. The locking element 320 and the drive element 34 slide with respect to the pipe 21 synchronously through the first pin 344 , Consequently, when the actuator 330 is pulled, the drive element 34 the locking element 320 drive to within the first retention opening 341 of the pipe 21 to slide synchronously.

As in 2 to 5 shown, is the locking element 320 elongated, wherein the locking element 320 slidable in the pipe 21 is arranged, and a lower end of the locking element 320 stands out of a free end of the pipe 21 out to a locking area 321 to form, with the engagement groove 310 engaged. An upper end of the locking element 320 is with the drive element 34 connected by the first pin, so that the locking element 320 and the drive element 34 concerning the pipe 21 can slide synchronously. Because the locking element is elongate, the locking element 320 easy in the pipe 21 be installed and hidden, so that the structure can be more compact and appropriate. In addition, the inner wall of the pipe 21 used to slide the locking element 320 respectively.

To ensure that the locking element 320 always with the engagement groove 310 in a normal condition (ie a condition need not change the angle of inclination of the backrest) engaged and to ensure stability and safety of the stroller, as in 2 to 5 illustrated, includes the backrest angle adjustment device 30 Further, a first elastic element 35 wherein the first elastic element 35 is compressed and at the upper end of the locking element 320 and the pipe 21 is applied, that is, the first elastic element 35 clamps the locking element 320 to the engagement groove 310 always before. Consequently, the invention can ensure that the locking element 320 always with the engagement groove 310 in normal condition is engaged. After actuation of the actuating element 30 to the locking element 320 from the engagement groove 310 disengage, the locking element 320 also with the engagement groove 310 due to the elastic force passing through the first elastic element 35 is automatically engaged, thus providing the automatic recovery function for the locking element 320 to reach.

The second constraint type of travel distance of the drive base 32 is described below. As in 2 to 5 shown, the locking element has 320 a second retention opening formed thereon 322 on, wherein the second retaining opening 322 is elongated. The pipe 21 has a connection opening formed thereon 323 on, that of the second retention opening 322 equivalent. The second pen 324 goes through the connection opening 323 of the pipe 21 and the second retaining opening 322 of the locking element 320 therethrough. The invention may be the sliding distance of the drive element 34 concerning the pipe 21 through the cooperation between the second pen 324 and the second retaining opening 322 restrict.

The aforementioned two types of limitation of the travel distance of the drive base 32 can be performed independently or simultaneously. Needless to say that the stability of the locking element 320 and the durability of the drive base 32 can be ensured further if the abovementioned two types of restriction are carried out simultaneously. In particular, when the aforementioned two types of constraints are performed simultaneously, the length of the first restriction orifice may be 341 with the length of the second restriction opening 322 identical or different. On the other hand, if the aforementioned two types of constraints are not performed simultaneously, the moving distance becomes the driving base 32 determined by the shorter restriction opening. When the actuator 330 is pulled upward (ie, in the direction indicated by the arrow F1 in FIG 3 is shown), the locking element is 320 move up and then the lock area 321 of the locking element 320 from the engagement groove 310 disengaged. To prevent the locking element 320 up and moving endlessly when the locking element 320 moved over a predetermined distance, the second pin 324 at a lower edge of the second restriction opening 322 or the first pen 344 at an upper edge of the first restriction opening 341 abut, so that the locking element 320 can not move. At this time, either the first restriction opening is limited 341 or the second restriction opening 322 or both restrict an upward movement of the locking element 320 , As mentioned above, the first restriction opening 341 and the second restriction opening 322 an independent and effective movement of the locking element 320 restrict. One of ordinary skill in the art may choose either the first restriction orifice 341 or the second restriction opening 322 or both use to move the locking element 320 according to the practical applications.

As in 2 and 5 shown, is the second pen 324 on the fixation base 31 arranged. The pipe 21 is pivotable with the fixing base 31 over the second pin 324 connected, so that the pipe 21 regarding the fixation base 31 on the second pen 324 can turn. Consequently, the angle of inclination of the backrest may be increased by the rotation of the tube 21 be set.

Around the engagement grooves 310 on the fixation base 31 very good to arrange, as in 2 and 5 shown, has the fixing base 31 an intervention area 31a up to the drive base 32 protrudes, and the engagement grooves 310 are on the engagement area 31a arranged. In particular, the engagement grooves 310 on the intervention area 31a with identical distances with respect to the second pen 324 arranged.

Preferably, the engagement area 31a below the locking element 320 arranged.

Preferably, an outline or a contour of the engagement area 31a arcuate.

Preferably, the connecting element 33 pivotable with the actuator 330 and the drive base 32 connected.

Preferably, a free end of the locking portion 321 inclined.

Preferably, the engagement grooves 310 tooth-shaped.

Preferably, the free end of the locking area 321 and the engagement grooves 310 independently or simultaneously inclined and tooth-shaped, and the goal is to enable the user to adjust the angle of inclination of the backrest 20 to the upright direction, without a force on the actuator 330 to apply. When the free end of the locking area 321 and the engagement grooves 310 are simultaneously inclined and tooth-shaped, the free end of the locking element act 321 and the engagement groove 310 through inclined surfaces with each other, so that the user can save on additional work.

Second embodiment:

It will open 6 to 8th Referenced. A backrest angle adjustment device 30 ' The invention has a fixing base 31 ' and a drive base 32 ' on, with the fixation base 31 ' on the frame 10 fixable and the drive base 32 ' with the backrest 20 is connectable and with respect to the backrest 20 can slide. The fixation base 31 ' has at least two engagement grooves 310 ' on, with the engagement grooves 310 ' arcuately arranged to form a multi-level structure. The drive base 32 ' has a locking element 320 ' on, with one of the engagement grooves 310 ' engaged. The engagement groove 310 ' and the locking element 320 ' may engage each other at a predetermined angle, thus the drive base 32 ' regarding the fixation base 31 ' to lock. In this embodiment, in particular, five engagement grooves 310 ' on the fixation base 31 ' arranged, with the five engagement grooves 310 ' arcuate to form a five-step structure. The locking element 320 ' is a protruding pillar resting on the backrest 20 is fixed. When the locking element 320' with different engagement grooves 310 ' is engaged, is the drive base 32 ' at different angles with respect to the fixation base 31 ' fixable, so that the backrest 20 at different angles of inclination with respect to the frame 10 is positioned so as to provide an angle adjustment for the backrest 20 to reach. The number of engagement grooves 310 ' may be determined by a person of ordinary skill in the art according to embodiments of the invention under practical requirements, so that they will not be detailed here. As mentioned above, the seat back angle adjustment device 30 ' the invention, the Fixierbasis 31 ' on the frame 10 is fixable, and the drive base 32 ' on that with the backrest 20 is connectable and with respect to the backrest 20 can slide, and the engagement grooves 310 ' on the fixation base 31 ' are arranged arcuately arranged to form the multi-level structure. When the locking element 320 ' that on the drive base 32 ' is arranged, with different engagement grooves 310 ' is engaged at different stages, is therefore the inclination angle of the backrest 20 concerning the frame 10 different in order to achieve the goals of a multi-level approach, simple structure and appropriate design.

To engage between the locking element 320 ' and the engagement groove 310 ' execute as in 6 to 8th illustrated, the seat back angle adjustment device 30 ' Furthermore, a connecting element 33 ' on, with one end of the connecting element 33 ' with the drive base 32 ' and another end of the connecting element 33 ' with an actuating element 330 ' connected is. In this embodiment, the connecting element 33 ' a flexible webbing and the actuator 330 ' is slidable on the backrest 20 arranged. In a further embodiment, the connecting element 33 ' be a rigid structure, so that the actuator 330 ' not with the backrest 20 can be connected. A user can use the actuator 330 ' in a direction represented by an arrow D1, as in FIG 8th shown. When the actuator 330 ' is pulled, drives the actuator 330 ' the connecting element 33 ' to move on. When the connecting element 33 ' moves, drives the connector 33 ' the locking element 320 ' the drive base 32 ' on to from the engagement groove 310 ' disengage, thus the drive base 32 ' and the fixation base 31 ' to unlock. After unlocking the drive base 32 ' and the fixation base 31 ' the user can adjust the angle of inclination of the backrest 20 according to his / her needs. Upon completion of adjusting the angle of inclination of the backrest 20 the user releases the force in the direction D1, so that the locking element 320 ' with the engagement groove 310 ' is engaged again. Consequently, the adjustment of the inclination angle of the backrest becomes 20 completed. Because the locking element 320 ' with the engagement groove 310 ' through the cooperation between the actuator 330 ' and the connecting element 33 ' is engaged or disengaged (ie, both are locked together or unlocked from each other), the design is appropriate, the structure simple and the operation comfortable.

As in 8th and 9 illustrated, the seat back angle adjustment device 30 ' an adjustment mechanism, wherein the adjustment mechanism is a support element 38 ' and a handle 39 ' having. One end of the support element 38' is pivotable with a pipe 21 the backrest 20 and another end of the support member 38 ' is pivotable with the handle 39 ' connected. The handle 39 ' is through the support element 38 ' supported. When the handle 39 ' is pulled, the pipes are 21 as a result of the action of the support element 38 ' folded.

To the actuator 330 ' and the handle 39 ' very good to operate, as in 8th and 9 shown, the actuating element 330 ' a gripping area 331 ' which protrudes outward for a finger to pull, and the handle 39 ' also has a gripping area 391 ' which protrudes outward for a finger to pull.

When the connecting element 33 ' is a webbing is the actuator 330 ' preferably on the handle 39 ' slidably mounted, thus the actuating element 330 ' support.

To the actuator 330 ' on the handle 39 ' to slide evenly, as in 8th and 9 shown, the handle points 39 ' a sliding pin 392 ' on that to the actuator 330 ' protruding, wherein the actuating element 330 ' a sliding groove formed thereon 332 ' having, wherein the sliding pin 392 ' slidable on the sliding groove 332 ' is arranged.

To the engagement between the locking element 320 ' and the engagement groove 310 ' execute as in 6 to 8th shown, the drive base 32 ' Further, a drive element 34 ' on, wherein the drive element 34 ' slidable on the pipe 21 the backrest 20 is arranged. The drive element 34 ' is with one end of the aforementioned connecting element 33 ' and the other end of the connecting element 33 ' is with the aforementioned actuator 330 ' connected. When the actuator 330 ' is actuated, the actuating element 330 ' the drive element 34 ' directly through the connection of the connecting element 33 ' actuate so that the drive element 34 ' and the actuator 330 ' to move together. When the drive element 34 ' slides, becomes the driving element 34 ' the locking element 320 ' for engagement with the engagement groove 310 ' or to disengage from the engagement groove 310 ' drive. The arrangement of the drive element 34 ' may also provide stability and convenience in operating the actuator 330 ' ensure the engagement between the locking element 320 ' and the engagement groove 310 ' to control. The pipe 21 In particular, this embodiment also has the first restricting opening (not shown in the figures) formed thereon, as in the aforementioned first embodiment. The drive element 34 ' has a mounting hole formed thereon 34a ' which corresponds to the first restriction opening. The first pen 344 goes through the mounting hole 34a ' of the drive element 34 ' and the first restriction opening of the pipe 21 therethrough. The first pen 344 limits the drive element 34 ' to slide within the first restriction opening, and restricts the drive member 34 ' to get within a certain area on the pipe 21 to glide.

To the drive element 34 ' slide very well to drive the locking element to engage with the engagement groove 310 ' to engage or disengage, as in 8th and 10 shown, the drive element 34 ' a trigger area 341 ' on, to the fixing base 31 ' protrudes. The trigger area 341 ' In particular, has an inclined surface to a sliding direction of the triggering area 341 ' along the backrest 20 on. Preferably, the triggering area 341 ' and the fixation base 32 ' slidable and complementary in contact with the inclined surfaces. The locking element 320 ' is from the engagement groove 310 ' disengaged when the trip area 341 ' of the drive element 34 ' regarding the fixation base 31 ' slides. When the actuator 330 ' is actuated, the actuating element 330 ' consequently the drive element 34 ' for moving together with the connecting element 33 ' drive. When the drive element 34 ' is moved, the trip area is 341 ' , that of the drive element 34 ' protrudes, move synchronously. If the trip area 341 is moved, the trip area 341 ' the fixation base 31 ' push, which is slidable and complementary to the trip area 341 ' is in contact to move away from the trigger area 341 ' wegzubewegen, thus the locking element 320 ' from the engagement groove 310 ' disengage. The arrangement of the trip area 341 ' can also ensure stability and reliability when the locking element 320 ' with the engagement groove 310 ' engaged or disengaged.

As in 8th and 10 shown, is the locking element 320 ' on a free end of the pipe 21 arranged horizontally and is the engagement groove 310 ' out. According to the locking element 320 ' are the engagement grooves 310 ' Recess arrangements recessed inwards and horizontally. The locking element 320 ' is columnar, so that the locking element 320 ' with the engagement groove 310 ' easier and smoothly engaged or disengaged.

To improve the manufacture and assembly, as in 10 and 11 illustrated, the seat back angle adjustment device 30 also an engagement element 36 ' on, wherein the engagement element 36 ' is fan-shaped and in the fixation base 31 ' is arranged, and the arcuate groove 311 ' and the engagement grooves 310 ' on the engaging element 36 ' are arranged.

Preferably, the engagement element 36 ' horizontally and slidably in the fixation base 31 ' arranged. In particular, stand the two positioning columns 313 ' from the fixation base 31 ' horizontally protruding and the engaging element 36 ' has two sliding openings formed thereon 361 ' on, the positioning columns 313 ' correspond. Through the cooperation between the positioning columns 313 ' and the sliding openings 361 ' can the engagement element 36 ' horizontally and slidably in the fixation base 31 ' to be ordered. More precisely, the engagement element 36 ' can be in one direction parallel to the positioning columns 313 ' slide.

To the locking element 320' to guide to with the engagement groove 310 ' smoothly engaged or disengaged, as in 10 and 11 shown, the side walls of the recess assemblies are inclined, that is, the side walls of the engagement grooves 310 ' are inclined. When the columnar locking element 320 ' into the engagement groove 310 ' is used, the side walls of the engagement groove 310 ' the locking element 320 ' smoothly into the engagement groove 310 ' to lead. On the other hand, when the locking element 320 ' from the engagement groove 310 ' is disengaged, the side walls of the engagement groove 310 ' also the locking element 320 ' from the engagement groove 310 ' gradually and smoothly. As a result, greater efforts are saved in the operation.

To the fixation base 31 ' , which is slidable and complementary to the triggering area 341 ' is in contact, away from the trigger area 341 ' or close to this very well, like in 10 and 11 is an arcuate groove 311 ' on one surface of the fixation base 31 ' trained and the drive base 32 ' facing, is a first inclined surface 312 ' on a side wall of the arcuate groove 311 ' trained, and assigns the trip area 341 ' a second inclined surface 342 ' on top, with the first inclined surface 312 ' slidable and complementary in contact. When operating the actuator 330 ' drives the actuator 330 ' the drive element 34 ' for moving together with the connecting element 33 ' at. When the drive element 34 ' is moved, the trip area is 341 ' , that of the drive element 34 ' protrudes, move synchronously. Because the second inclined surface 342 ' of the trip area 341 ' with the first inclined surface 312 ' the fixation base 31 ' slidable and complementary in contact, is the triggering area 341 ' the fixation base 31 ' Press to move away from the trip area 341 ' move away, so that the engagement groove 310 ' , which is arranged horizontally, away from the locking element 320 ' , which is arranged horizontally, move away until the locking element 320 ' from the engagement groove 310 ' is disengaged. In addition, if the drive element 34 ' moves in a direction opposite to the aforementioned direction becomes the locking element 320 ' into the engagement groove 310 ' be gradually inserted so that the locking element 320 ' with the engagement groove 310 ' engaged. The arrangement of the first inclined surface 312 ' and the second inclined surface 342 ' can also ensure stability and reliability when the locking element 320 ' with the engagement groove 310 ' engaged or disengaged.

To ensure that the locking element 320 ' always with the engagement groove 310 ' in a normal condition (ie, a condition need not alter the inclination angle of the seatback), as in FIG 10 illustrated, includes the backrest angle adjustment device 30 ' further a second elastic element 35 ' wherein the second elastic element 35 ' compressed and between an upper end of the drive element 34 ' and the pipe 21 is arranged. The second elastic element 35 ' always brings a downward pressure on the drive element 34 ' on. Because the trigger area 341 ' in the arcuate groove 311 ' the fixation base 31 ' protrudes to form a complementary contact with the inclined surfaces, biases the second elastic element 35 ' the trigger area 341 ' always to the arcuate groove 311 ' the fixation base 31 ' in the normal state, thus ensuring that the locking element 320 ' always with the engagement groove 310 ' in normal condition is engaged. After actuation of the actuating element 330 ' to the locking element 320 ' from the engagement groove 310 ' disengage, is the triggering area 341 ' also on the arcuate groove 311 ' the fixation base 31 abut again to provide an elastic force. Consequently, the locking element 320 ' with the engagement groove 310 ' automatically due to the elastic force passing through the second elastic element 35 ' is engaged, thus an automatic recovery function for the locking element 320 ' to reach.

To further ensure that the locking element 320 ' always with the engagement groove 310 ' in normal condition is engaged, as in 10 and 11 illustrated, the seat back angle adjustment device 30 ' Further, a third elastic element 37 ' on, wherein the third elastic element 37 ' compressed and between the fixation base 31 ' and the engagement element 36 ' is arranged. The third elastic element 37 ' always tenses the engagement element 36 ' to the drive base 32 ' in front. Because the engagement element 36 ' always to the drive base 32 ' by the elastic force passing through the third elastic element 37 ' is generated, is biased and the arcuate groove 311 ' and the engagement grooves 310 ' on the engaging element 36 ' are arranged, is the first inclined surface 312 ' the arcuate groove 311 ' always with the second inclined surface 342 ' of the trip area 341 ' in contact by pressure. Consequently, the second elastic element tensions 35 ' and the third elastic element 37 ' the trigger area 341 ' to the arcuate groove 311 ' the fixation base 31 ' in the normal condition, to ensure that the locking element 320 ' always with the engagement groove 310 ' in normal condition is engaged. When the locking element 320 ' from the engagement groove 310 ' is disengaged sees the second elastic element 35 ' and the third elastic element 37 ' Also, always apply a force to moving the trigger area 341 ' to restrict. When a user releases the actuator 330 ' Thus, the invention can provide a better hand feeling, avoid misoperation and provide a stable and reliable operation.

Preferably, the second elastic element 35 ' and the third elastic element 37 ' Be coil springs.

Besides, the structure and the principle of the frame 10 and the backrest 20 of the baby carriage 100 the invention for a person skilled in the art, so that they are not shown here in detail.

Although the invention has been described in accordance with the preferred embodiments described above, it is not limited by these embodiments described above. Variations and variations of the embodiments described above will appear to those of ordinary skill in the art in light of the above teachings. They are defined by the following claims. In addition to the above written disclosure of the invention is hereby supplementary to the drawings in 1 to 11 Referenced.

In summary, the following can be stated:
A seat back angle adjusting device adapted for a stroller includes a fixing base and a drive base, wherein the fixing base is fixable on a frame, and the drive base is connectable to a seat back and can rotate with respect to the fixing base. The fixing base has at least two engagement grooves, wherein the engagement grooves are arranged arcuately to form a multi-stage structure. The drive base has a locking element which engages with one of the engagement grooves. The engaging groove and the locking member may be engaged with each other at a predetermined angle so as to lock the driving base with respect to the fixing base. Consequently, when the locking member disposed on the driving base engages with different engaging grooves of different stages, the inclination angle of the backrest with respect to the frame is different.

LIST OF REFERENCE NUMBERS

10

 frame

20

 backrest

21

 pipe

30, 30 '

 Backrest angle adjustment mechanism

31, 31 '

 fixing base

31a

 engagement area

32, 32 '

 drive base

33, 33 '

 connecting element

34, 34 '

 driving element

34a, 34a '

 hole

35

 first elastic element

35 '

 second elastic element

36 '

 engaging member

37 '

 third elastic element

38, 38 '

 supporting

39, 39 '

 Handle

100

 stroller

310, 310 '

 engaging grooves

311 '

 groove

312 '

 first inclined surface

313 '

 positioning pillar

320, 320 '

 locking element

321

 locking area

322

 second retaining opening or restriction opening

330, 330 '

 actuator

331, 331 '

 Griffin area

332, 332 '

 slide groove

341

 first retaining opening or restricting opening

341 '

 trip area

342

 hole

342 '

 second inclined surface

343

 pegging

344

 first pen

361 '

 sliding opening

391, 391 '

 Griffin area

392, 392 '

 slide

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 6830254 [0002, 0003]
• CN 200720171699 [0002, 0004]
• CN 200820147287 [0002, 0005]

Claims (35)

Backrest angle adjustment device ( 30 . 30 ' ), which are used for a stroller ( 100 ), the stroller ( 100 ) a frame ( 10 ) and a backrest ( 20 ), wherein an angle of inclination of the backrest ( 20 ) is adjustable with respect to the frame, wherein the backrest angle adjustment device ( 30 . 30 ' ): - a fixation base ( 31 . 31 ' ), which are on the frame ( 10 ) is fixable, wherein the fixing base ( 31 . 31 ' ) at least two engagement grooves ( 310 . 310 ' ), wherein the engagement grooves ( 310 . 310 ' ) are arranged arcuately to form a multi-level structure; and - a drive base ( 32 . 32 ' ), with the backrest ( 20 ) is connectable and with respect to the fixing base ( 31 . 31 ' ), the drive base ( 32 . 32 ' ) a locking element ( 320 . 320 ' ), which with one of the engagement grooves ( 310 . 310 ' ) is engaged, wherein the engagement groove ( 310 . 310 ' ) and the locking element ( 320 . 320 ' ) are engageable with each other at a predetermined angle to thereby provide the drive base ( 32 . 32 ' ) with respect to the fixation base ( 31 . 31 ' ) to lock. Backrest angle adjustment device ( 30 . 30 ' ) according to claim 1, further comprising a connecting element ( 33 . 33 ' ), wherein one end of the connecting element ( 33 . 33 ' ) with the drive base ( 32 . 32 ' ), another end of the connecting element ( 33 . 33 ' ) with an actuating element ( 330 . 330 ' ) connected is. Backrest angle adjustment device ( 30 . 30 ' ) according to claim 1 or 2, further comprising an adjustment mechanism, wherein the adjustment mechanism comprises a support element ( 38 . 38 ' ) and a handle ( 39 . 39 ' ), wherein one end of the support element ( 38 . 38 ' ) pivotable with a tube ( 21 ) of the backrest ( 20 ), another end of the support element ( 38 . 38 ' ) pivoting with the handle ( 39 . 39 ' ) and the handle ( 39 . 39 ' ) by the support element ( 38 . 38 ' ) is supported. Backrest angle adjustment device ( 30 . 30 ' ) according to claim 2 or 3, wherein the actuating element ( 330 . 330 ' ) and / or the handle ( 39 . 39 ' ) a gripping area ( 331 . 331 ' ) protruding outward for a finger to pull. Backrest angle adjustment device ( 30 ) according to one of claims 2 to 4, wherein the connecting element ( 33 ) is a rigid structure and the actuating element ( 330 ) is supported. Backrest angle adjustment device ( 30 ) according to claim 5, wherein the connecting element ( 33 ) and the actuating element ( 330 ) are arranged independently. Backrest angle adjustment device ( 30 . 30 ' ) according to one of the preceding claims, wherein the drive base ( 32 . 32 ' ) a drive element ( 34 . 34 ' ), wherein the drive element ( 34 . 34 ' ) sliding on a pipe ( 21 ) of the backrest ( 20 ) is arranged, and the drive element ( 34 . 34 ' ) slides to the locking element ( 320 . 320 ' ) to engage with the engagement groove ( 310 . 310 ' ) to be engaged or disengaged. Backrest angle adjustment device ( 30 ) according to claim 7, wherein the tube ( 21 ) a first restriction opening ( 341 ), wherein the first restriction opening ( 341 ) is elongated, and the first restriction opening ( 341 ) a sliding distance of the drive element ( 34 ) with respect to the tube ( 21 ). Backrest angle adjustment device ( 30 ) according to claim 7 or 8, wherein the locking element ( 320 ) is elongated, wherein the locking element ( 320 ) slidable in the tube ( 21 ) is arranged, a lower end of the locking element ( 320 ) from a free end of the tube ( 21 ) protrudes to a locking area ( 321 ) formed with the engagement groove ( 310 ) is engaged, an upper end of the locking element ( 320 ) with the drive element ( 34 ), and the locking element ( 320 ) and the drive element ( 34 ) with respect to the tube ( 21 ) synchronously. Backrest angle adjustment device ( 30 ) according to claim 9, wherein a free end of the locking area ( 321 ) is oblique. Backrest angle adjustment device ( 30 ) according to one of the preceding claims, wherein the engagement grooves ( 310 ) are tooth-shaped. Backrest angle adjustment device ( 30 ) according to one of claims 8 to 11, further comprising a first pin ( 344 ), wherein the first pin ( 344 ) through the first restriction opening ( 341 ) of the pipe ( 21 ), the drive element ( 34 ) and the locking element ( 320 ), the first pin ( 344 ) the drive element ( 34 ) within the first restriction opening ( 341 ), wherein the locking element ( 320 ) and the drive element ( 34 ) with respect to the tube ( 21 ) synchronously via the first pin ( 344 ) slide. Backrest angle adjustment device ( 30 ) according to one of the preceding claims, further comprising a first elastic element ( 35 ), wherein the first elastic element ( 35 ) the locking element ( 320 ) to the engagement groove ( 310 ). Backrest angle adjustment device ( 30 ) according to one of claims 8 to 13, wherein the locking element ( 320 ) a second restriction opening ( 322 ), wherein the second restriction opening ( 322 ) is elongated, a second pen ( 324 ) through the pipe ( 21 ) and the second restriction opening ( 322 ) passes through, and the second restriction opening ( 322 ) Furthermore, the sliding distance of the drive element ( 34 ) with respect to the tube ( 21 ). Backrest angle adjustment device ( 30 ) according to claim 14, wherein a length of the first restriction opening ( 341 ) having a length of the second restriction opening ( 322 ) is identical. Backrest angle adjustment device ( 30 ) according to one of claims 7 to 15, wherein the fixing base ( 31 ) pivotable with the tube ( 21 ) connected is. Backrest angle adjustment device ( 30 ) according to claim 16, wherein said second pin ( 324 ) on the fixation base ( 31 ) and the fixing base ( 31 ) pivotable with the tube ( 21 ) through the second pin ( 324 ) connected is. Backrest angle adjustment device ( 30 ) according to claim 17, wherein the fixing base ( 31 ) an intervention area ( 31a ) to the drive base ( 32 ) protrudes, and the engagement grooves ( 310 ) on the engagement area ( 31a ) are arranged. Backrest angle adjustment device ( 30 ) according to claim 18, wherein the engagement grooves ( 310 ) on the engagement area ( 31a ) with identical distances with respect to the second pen ( 324 ) are arranged. Backrest angle adjustment device ( 30 ) according to claims 18 to 19, wherein the engagement area ( 31a ) below the locking element ( 320 ) is arranged. Backrest angle adjustment device ( 30 ) according to claim 18 to 20, wherein an outline of the engagement area ( 31a ) is arcuate. Backrest angle adjustment device ( 30 ' ) according to one of claims 3 to 21, wherein the connecting element ( 33 ' ) is flexible and the actuator ( 330 ' ) slidable on the handle ( 39 ' ) is arranged. Backrest angle adjustment device ( 30 ' ) according to claim 22, wherein the connecting element ( 33 ' ) is a webbing. Backrest angle adjustment device ( 30 ' ) according to claim 22 or 23, wherein the handle ( 39 ' ) a sliding pin ( 392 ' ), which is the actuating element ( 330 ' protruding), wherein the actuating element ( 330 ' ) a sliding groove ( 332 ' ), and the sliding pin ( 392 ' ) slidable in the sliding groove ( 332 ' ) is arranged. Backrest angle adjustment device ( 30 ' ) according to one of claims 7 to 24, wherein the drive element ( 34 ' ) a trigger area ( 341 ' ), which is used as fixation base ( 31 ' ), where the triggering range ( 341 ' ) and the fixing base ( 31 ' ) are slidably and additionally in contact with the inclined surfaces, and the locking element ( 320 ' ) of the engagement groove ( 310 ' ) is released when the trip area ( 341 ' ) of the drive element ( 34 ' ) with respect to the fixation base ( 31 ' ) slides. Backrest angle adjustment device ( 30 ' ) according to claim 25, wherein the locking element ( 320 ' ) on a free end of the tube ( 21 ) is arranged horizontally and the engagement groove ( 310 ' protruding). Backrest angle adjustment device ( 30 ' ) according to claim 26, wherein the locking element ( 320 ' ) is columnar. Backrest angle adjustment device ( 30 ' ) according to claim 1 to 27, wherein the engagement grooves ( 310 ' ) Recess arrangements are recessed inwards and horizontally. Backrest angle adjustment device ( 30 ' ) according to claim 28, wherein side walls of the recess arrangements are inclined. Backrest angle adjustment device ( 30 ' ) according to claim 25, wherein an arcuate groove ( 311 ' ) on one surface of the fixation base ( 31 ' ) and the drive base ( 32 ' ), wherein a first inclined surface ( 312 ' ) on a side wall of the arcuate groove ( 311 ' ), the tripping area ( 341 ' ) a second inclined surface ( 342 ' ) which is slidably and complementally in contact with the first inclined surface (312 '). Backrest angle adjustment device ( 30 ' ) according to claim 30, further comprising a second elastic element ( 35 ' ), wherein the second elastic element ( 35 ' ) the trigger area ( 341 ' ) of the drive element ( 34 ' ) to the arcuate groove ( 311 ' ) of the fixation base ( 31 ' ). Backrest angle adjustment device ( 30 ' ) according to claim 31, further comprising an engagement element ( 36 ' ), wherein the engagement element ( 36 ' ) is fan-shaped and in the fixing base ( 31 ' ), wherein the arcuate groove ( 311 ' ) and the Engaging grooves ( 310 ' ) on the engagement element ( 36 ' ) are arranged. Backrest angle adjustment device ( 30 ' ) according to claim 32, wherein the engagement element ( 36 ' ) horizontally and slidably in the fixation base ( 31 ' ) is arranged. Backrest angle adjustment device ( 30 ' ) according to claim 33, further comprising a third elastic element ( 37 ' ), wherein the third elastic element ( 37 ' ) the engagement element ( 36 ' ) to the drive base ( 32 ' ). Stroller ( 100 ), the frame ( 10 ), the backrest ( 20 ) and the backrest angle adjustment device ( 30 . 30 ' ) according to one of claims 1 to 34, wherein the angle of inclination of the backrest ( 20 ) with regard to the framework ( 10 ) by the backrest angle adjustment device ( 30 . 30 ' ) is adjustable.

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