CN216783606U

CN216783606U - Linkage unlocking mechanism for folding frame and seat frame

Info

Publication number: CN216783606U
Application number: CN202123301098.9U
Authority: CN
Inventors: 李建新; 周劲松; 李林
Original assignee: Changde Yixiang Industrial Co ltd
Current assignee: Changde Yixiang Industrial Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-21
Anticipated expiration: 2031-12-27

Abstract

The utility model belongs to the technical field of stroller frames, and particularly relates to a linkage unlocking mechanism for folding a frame and a seat frame. Not only effectively simplifying the folding operation, but also being more convenient for people to use; and each part has compact structure, reasonable design and strong linkage.

Description

Linkage unlocking mechanism for folding frame and seat frame

Technical Field

The utility model relates to the technical field of baby carriers, in particular to a folding linkage unlocking mechanism for a frame and a seat frame.

Background

The foldable stroller brings good experience to users when going to the market, and solves the problem of inconvenience in carrying when going out. The folding stroller in the prior art generally comprises a frame, a seat frame and the like, wherein the frame and the seat frame are folded separately, and unlocking operations need to be completed respectively before folding, which is very cumbersome.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a frame and seat folding linkage unlocking mechanism with more reasonable structural design and convenient unlocking.

In order to realize the purpose, the utility model adopts the technical scheme that: a linkage unlocking mechanism for folding a frame and a seat frame comprises a seat frame joint and a frame joint and is characterized in that the seat frame joint comprises a seat frame fixing arm and a backrest frame rotating arm, wherein a locking disc is fixedly connected to the inner side of the seat frame fixing arm, and the locking disc and a locking gear are locked with each other; the unlocking turntable, the locking disk, the locking gear and the internal tooth groove disk are coaxially arranged, the unlocking turntable is assembled between the locking disk and the locking gear, and the unlocking turntable performs relative rotation action relative to the locking disk and the locking gear; the unlocking turntable is provided with a plurality of unlocking holes along the circumferential direction, a traction pin is fixed at the lower part of one side of the unlocking turntable, a steel wire rope is fixedly connected to the traction pin, and the unlocking turntable is driven to rotate by traction of the steel wire rope; correspondingly, a plurality of guide inclined planes are processed on the surface, matched with the unlocking rotary table, of the locking gear, each guide inclined plane penetrates through the corresponding unlocking hole, the locking gear is embedded in the internal tooth groove disc, and the internal tooth groove disc is fixedly connected with the backrest frame rotating arm; an extrusion slot hole is formed in the inner tooth groove disc, and a linkage lower pressing block extends into the extrusion slot hole;

the frame joint comprises a pushing arm, an unlocking linkage block, a movable locking piece and a fixed locking piece, wherein the pushing arm is coaxially and fixedly connected with the fixed locking piece; the unlocking linkage block is positioned right below the linkage lower pressing block and is in limit locking with the upper part and the lower part of the pushing arm rotating arm; the upper limit of the pushing arm rotating arm is provided with a movable locking piece which moves up and down along the pushing arm rotating arm; a first clamping column is processed on one side of the movable locking piece, and the first clamping column and the unlocking linkage block are limited and locked up and down; a second clamping column and a third clamping column are processed on the other side of the movable locking piece; correspondingly, a first locking slotted hole and a first unlocking arc-shaped slotted hole for a second clamping column to pass through are formed in the fixed locking piece, the first locking slotted hole is communicated with the first unlocking arc-shaped slotted hole, a second locking slotted hole and a second unlocking arc-shaped slotted hole for a third clamping column to pass through are also formed in the fixed locking piece, and the second locking slotted hole is communicated with the second unlocking arc-shaped slotted hole; after the unlocking linkage block is pressed down, the unlocking linkage block is unlocked with the push handle rotating arm and pushes the movable locking piece to slide down to the second clamping column and the third clamping column of the movable locking piece to be separated from the corresponding locking slotted holes and enter the unlocking arc-shaped slotted holes to realize unlocking.

Furthermore, a first shell is fixedly connected to one side of the inner fluted disc, and a first return spring is fixedly connected between the first shell and the locking gear. The first return spring is provided to return the lock gear to a position locked with the lock disk.

Furthermore, another extrusion slot hole for the handrail locking linkage block to pass through is also formed in the inner gear groove disc, the inner wall of the extrusion slot hole is designed into an inclined plane, specifically, the surface of the extrusion slot hole, which is in contact with the handrail locking linkage block, is an inclined plane, and a return block is fixedly connected to the handrail locking linkage block; the fixed arm of the seat frame is hinged with a rotating arm of the armrest frame, and the return block and the rotating arm of the armrest frame are mutually limited and locked. Through the design of the scheme, the mutual locking between the rotating arm of the armrest frame and the inner tooth socket can be realized, and the linkage of the folding of the rotating arm of the armrest frame is further realized.

Furthermore, a limit tooth protruding out of the corresponding surface of the locking disc is formed on the locking disc and on one side facing the locking gear; correspondingly, a limiting groove is formed in the periphery of the locking gear and in a position corresponding to the limiting teeth, and the locking disc is inserted into the limiting groove through the limiting teeth so as to realize transverse limiting locking of the locking disc and the locking gear.

Furthermore, one side of the rotating arm of the pushing handle is fixedly connected with a second shell, a vertical linkage block guide groove is formed in one side, facing the unlocking linkage block, of the second shell, and the top and the bottom of the linkage block guide groove and one side, facing the movable locking piece, of the linkage block guide groove are provided with openings; the unlocking linkage block penetrates through the linkage block guide groove from top to bottom. This design realizes leading from top to bottom to the unblock linkage piece.

Furthermore, an upper limiting groove and a lower limiting groove are processed on one side of the pushing arm rotating arm, correspondingly, an upper extending part and a lower extending part which are respectively matched with the upper limiting groove and the lower limiting groove are formed at the top and the bottom of the movable locking piece, and the top and the bottom of the movable locking piece are limited in the upper limiting groove and the lower limiting groove of the pushing arm rotating arm; a central column is fixedly connected at the center of the pushing arm rotating arm and towards the side of the movable locking piece, correspondingly, a waist-shaped hole is arranged at the center of the movable locking piece, and the waist-shaped hole of the movable locking piece is sleeved on the central column, so that the movable locking piece can only move up and down along the central column. The design scheme realizes that the movable locking piece can only move up and down.

Compared with the prior art, the utility model has the beneficial effects that:

the folding device can effectively simplify the folding operation by linkage unlocking between the frame joint and the seat joint, and is more convenient for people to use; and each part has compact structure, reasonable design and strong linkage.

Drawings

FIG. 1 is a schematic view of the overall structure of the stroller of the present invention;

FIG. 2 is a schematic structural diagram of an unlocking structure according to the present invention;

FIG. 3 is a schematic view of a seat joint structure according to the present invention;

FIG. 4 is a schematic structural diagram of an unlocking turntable according to the present invention;

FIG. 5 is a schematic view of a locking gear structure according to the present invention

FIG. 6 is a view showing a locking linkage structure of an internal tooth grooved disc and an armrest frame according to the present invention;

FIG. 7 is a schematic view of the structure of the inner fluted disc, the unlocking rotary disc and the locking gear according to the present invention;

FIG. 8 is a cross-sectional view of the frame joint structure according to the present invention;

FIG. 9 is a diagram showing the fitting relationship between the unlocking linkage block and the first locking post according to the present invention;

FIG. 10 is a view showing the fitting relationship of the movable locking piece and the fixed locking piece according to the present invention;

wherein, 1, a pushing handle frame, 2, a front wheel frame, 3, a rear wheel frame, 4, a backrest frame, 5, a handrail frame, 6, a seat frame, 7, a seat joint, 8, a frame joint, 9, a seat frame fixed arm, 10, a backrest frame rotating arm, 11, a handrail frame rotating arm, 12, a pushing handle rotating arm, 13, a wheel fixed arm, 14, a wheel rotating arm, 15, a locking disc, 15.1, a limit tooth, 16, an unlocking rotating disc, 16.1, an unlocking hole, 16.2, a traction pin, 17, a locking gear, 17.1, a guide inclined plane, 18, an inner tooth grooved disc, 19, a first shell, 20, a first return spring, 21, a first extrusion slotted hole, 22, a second extrusion slotted hole, 23, a linkage lower pressing block, 24, an unlocking linkage block, 25, a movable locking piece, 26, a fixed locking piece, 26.1, a first locking slotted hole, 26.2, a first unlocking arc-shaped slotted hole, 26.3, a second locking slotted hole, 26.4, an unlocking arc-shaped slotted hole, 27. the handle locking device comprises a first clamping column, 28, a second shell, 29, a second clamping column, 30, a third clamping column, 31, a second locking groove, 32, a second locking button, 33, a second locking block, 34, a handle locking linkage block, 35 and a return block.

Detailed Description

The utility model will now be further elucidated with reference to the drawing. The following is the most preferred embodiment of the utility model, but it should not be construed as limiting the scope of the utility model, and any equivalent or similar substitutes without departing from the spirit of the utility model are intended to fall within the scope of the utility model. In addition, the terms "fixedly connected" and "fixed" in the text are the prior art, and include conventional fixing modes such as bolt fixing, welding and the like; in the description of the orientation, the terms "inside", "outside", "up" and "down" refer to the direction close to the center of the stroller, while the direction opposite to the inside is the direction in which the upper part of the stroller is located and the lower part is located. And all parts not described in detail below should be performed as in the prior art.

As shown in fig. 1-10, the foldable stroller of the present invention comprises a frame and a seat frame, wherein the frame comprises a stroller frame 1, a front wheel frame 2 and a rear wheel frame 3, the stroller frame 1 is of an inverted U shape, two ends of the bottom of the stroller frame 1 are respectively hinged with the front wheel frame 2 (specifically, the end of the front wheel frame, referred to as a wheel rotating arm 14), and two ends of the stroller frame 1 near the bottom (referred to as a stroller rotating arm 12) are rotatably connected with the two rear wheel frames 3 (specifically, wheel fixing arms 13 fixedly connected to the end of each rear wheel frame 3) through two frame joints 8; the seat frame comprises a backrest frame 4, a handrail frame 5 and a seat frame 6, wherein the backrest frame 4 is also in an inverted U shape, two ends of the bottom (called as backrest frame rotating arms 10) of the backrest frame 4 are rotatably connected with the seat frame 6 (specifically, a seat frame fixing arm 9 fixedly connected to the end of the seat frame 6) through two seat joints 7, and the handrail frame 5 (specifically, a handrail frame rotating arm 11 fixedly connected to the end of two ends of the handrail frame 5) is hinged on the seat frame 6 (specifically, the seat fixing arm frame 9).

The seat joint 7 comprises a seat frame fixing arm 9, a backrest frame rotating arm 10, a locking disc 15, an unlocking turntable 16, a locking gear 17 and an internal tooth groove disc 18, wherein the locking disc 15, the unlocking turntable 16, the locking gear 17 and the internal tooth groove disc 18 are coaxially arranged; a locking disk 15 is fixedly connected to the inner side of the seat frame fixing arm 9, a limiting tooth 15.1 (a limiting tooth 15.1 can be formed at the upper part or a limiting tooth 15.1 is formed at both the upper part and the lower part) which protrudes out of the corresponding surface of the locking disk 15 is formed on the locking disk 15 and faces one side of the locking gear 17, correspondingly, a limiting groove is formed at the periphery of the locking gear 17 and the position corresponding to the limiting tooth 15.1, and the limiting tooth 15.1 of the locking disk 15 extends into the limiting groove to realize transverse limiting locking; an installation groove is arranged on one side of the locking gear 17 facing the unlocking turntable 16, the unlocking turntable 16 is arranged in the installation groove, and the unlocking turntable 16 rotates relative to the locking disk 15 and the locking gear 17; a plurality of unlocking holes 16.1 are formed in the unlocking rotary disc 16 along the circumferential direction, a traction pin 16.2 is fixedly connected below one side of the unlocking rotary disc 16, one end of the traction pin 16.2 is fixedly connected with a steel wire rope, the steel wire rope penetrates through the backrest frame 4 and is fixedly connected to a button which is arranged at the top of the backrest frame 4 in a conventional mode, the steel wire rope is driven by pulling the button, and the traction pin 16.2 is driven by pulling, so that the unlocking disc 15 rotates; a plurality of guide inclined planes 17.1 are processed on the side face of the locking gear 17, which is matched with the unlocking rotary disc 16, the top of each guide inclined plane 17.1 penetrates through the corresponding unlocking hole 16.1, when the unlocking disc 15 is pulled to rotate, the unlocking holes 16.1 extrude the guide inclined planes 17.1, so that the locking gear 17 transversely retreats, the limiting teeth 15.1 on the locking disc 15 are disengaged from the limiting grooves on the locking gear 17, and the unlocking is realized between the locking gear 17 and the locking disc 15; the center of the internal gear groove disk 18 is provided with a hole, the inner wall of the hole is provided with a plurality of tooth grooves along the circumferential direction, teeth on the periphery of the locking gear 17 are meshed with the tooth grooves arranged inside the internal gear groove disk 18, the internal gear groove disk 18 is fixedly connected to the backrest frame rotating arm 10, and after the locking gear 17 and the locking disk 15 are unlocked, the backrest frame rotating arm 10 can rotate relative to the seat frame fixing arm 9; in order to enable the locking gear 17 to be re-locked with the locking disk 15 when in use, a first housing 19 is fixedly connected to the inside of the internal spline 18, and a first return spring 20 is fixedly connected between the first housing 19 and the locking gear 17.

The utility model also forms two lock grooves 31 on the periphery of the inner tooth groove disc 18, a second lock button 32 is limited on the seat frame fixing arm 9, a third spring is fixedly connected between the second lock button 32 and the seat frame fixing arm 9, a second lock block 33 is fixedly connected on the second lock button 32, and the second lock block 33 and the second lock grooves 31 realize the up-and-down limiting locking. The folding and folding of the seat frame of the utility model have two locking functions, thus further improving the stability of the baby stroller.

According to the utility model, the inner tooth groove disc 18 is provided with a first extrusion groove hole 21, the inner wall surface of the second extrusion groove hole 21 is designed into an inclined surface, the inside of the first extrusion groove hole 21 is provided with a handrail locking linkage block 34, the handrail locking linkage block 34 is fixedly connected to a return block 35, the other end of the return block 35 and the handrail frame rotating arm 11 realize limit locking in the inner and outer directions (namely, limit teeth are integrally formed on the inner side of the return block, the outer side of the handrail frame rotating arm 11 is provided with a clamping groove matched with the limit teeth), and a return spring is fixedly connected between the return block 35 and the seat frame fixing arm 9. Through the rotation of the internal tooth groove disc 18, the first extrusion groove hole 21 extrudes the handrail locking linkage block 34 to move outwards to be separated from the second extrusion groove hole 21, and in the process that the handrail locking linkage block 34 is pushed outwards, the return block 35 is driven to move outwards, so that the return block 35 and the handrail frame rotating arm 11 are unlocked, and the handrail frame rotating arm 11 can drive the handrail frame 5 to rotate and fold relative to the seat frame fixing arm 9.

A second extrusion groove hole 22 is formed in the inner tooth groove disc 18, wherein a part of the linkage lower pressing block 23 extends into the second extrusion groove hole 22 from outside to inside; when the inner fluted disc 18 rotates clockwise along with the backrest frame rotating arm 10, the second extrusion slotted hole 22 extrudes the linkage lower pressing block 23 to move downwards, the other part of the linkage lower pressing block 23 presses the unlocking linkage block 24 downwards, and the linkage lower pressing block 23 is integrally in an inverted L shape.

The frame joint 8 comprises a pushing arm rotating arm 12, an unlocking linkage block 24, a movable locking piece 25 and a fixed locking piece 26, wherein the pushing arm rotating arm 12 is coaxially and fixedly connected with the fixed locking piece 26. The unlocking linkage block 24 is positioned right below the linkage lower pressing block 23, a bulge with an upward free end is formed on one side of the unlocking linkage block 24, correspondingly, a clamping groove with a downward opening is formed on the pushing arm rotating arm 12 corresponding to the bulge, and the unlocking linkage block 24 and the pushing arm rotating arm 12 realize upper and lower limit locking through the bulge and the clamping groove; an upper limiting groove (an opening at the bottom and a side close to the unlocking linkage block) and a lower limiting groove (an opening at the bottom and a side close to the unlocking linkage block) are processed at one side of the pushing arm rotating arm 12, correspondingly, an upper extending part and a lower extending part which are respectively matched with the upper limiting groove and the lower limiting groove are formed at the top and the bottom of the movable locking piece 25, and the top and the bottom of the movable locking piece 15 are limited in the upper limiting groove and the lower limiting groove of the pushing arm rotating arm 12; a central column is fixedly connected to the center of the pushing arm 12 and the side surface facing the movable locking piece 25, correspondingly, a waist-shaped hole is formed in the center of the movable locking piece 25, the length direction of the waist-shaped hole extends along the up-down direction, and the waist-shaped hole of the movable locking piece 12 is sleeved on the central column, so that the movable locking piece 12 can only move up and down along the central column when moving; a first clamping column 27 is fixedly connected to the lower portion of the side surface of the movable locking piece 25 facing the unlocking linkage block 24, and correspondingly, a fork opening (arc shape) is formed in the bottom of the unlocking linkage block 24, and the fork opening in the bottom of the unlocking linkage block 24 is matched with the first clamping column 27, so that the upper and lower limiting of the unlocking linkage block 24 and the movable locking piece 25 is realized; in order to conveniently guide the unlocking linkage block 24 up and down, a second shell 28 is fixedly connected to the inner side of the pushing arm rotating arm 12, a vertical linkage block guide groove (an opening at the top, the bottom and the right side part in fig. 8) is formed in one side, facing the unlocking linkage block 24, of the second shell 28, and the unlocking linkage block 24 penetrates through the linkage block guide groove from top to bottom; a second clamping column 29 and a third clamping column 30 are respectively and fixedly connected to the upper part and the lower part of the other side of the movable locking piece 25, correspondingly, a first locking slot 26.1 (circular) for the second clamping column 29 to pass through and a first unlocking arc-shaped slot 26.2 (specifically, an arc-shaped slot matched with the rotation direction of the fixed locking piece 26) are formed in the upper part of the fixed locking piece 26, the first locking slot 26.1 is communicated with the first unlocking arc-shaped slot 26.2, a second locking slot 26.3 and a second unlocking arc-shaped slot 26.4 for the third clamping column 30 to pass through are also formed in the lower part of the fixed locking piece 26, and the second locking slot 26.3 (circular) is communicated with the second unlocking arc-shaped slot 26.4; the fixed locking piece 26 is fixedly connected to the pushing arm 12. After the unlocking linkage block 24 is pressed down, the unlocking linkage block is unlocked from the pushing arm rotating arm 12, and after the fork opening moving down to the bottom of the unlocking linkage block 24 is clamped on the first clamping column 27, the movable locking piece 25 is pushed to slide down to the second clamping column 29 and the third clamping column 30 to be separated from the corresponding locking slotted holes on the fixed locking piece 26 and enter the unlocking arc-shaped slotted holes to realize unlocking, at the moment, the fixed locking piece 26 can be driven by the pushing arm rotating arm 12 to rotate and fold relative to the rear wheel frame 3.

The seat joint and the frame joint with the linkage function are arranged, so that the frame joint can be unlocked while the seat joint rotates after being unlocked, the unlocking operation in the folding process can be effectively simplified, and the folding device is convenient for people to use.

Claims

1. A linkage unlocking mechanism for folding a frame and a seat frame comprises a seat frame joint and a frame joint, and is characterized in that the seat frame joint comprises a seat frame fixed arm, a backrest frame rotating arm, a locking disc, an unlocking rotary disc, a locking gear and an internal tooth groove disc; wherein one side of a fixed arm of the seat frame is fixedly connected with a locking disk, and the locking disk and a locking gear are locked with each other; the unlocking rotary disc is assembled between the locking disc and the locking gear and performs relative rotation action relative to the locking disc and the locking gear; a plurality of unlocking holes are formed in the unlocking turntable along the circumferential direction of the unlocking turntable, and a traction pin is fixed on the unlocking turntable; correspondingly, a plurality of guide inclined planes are processed on the surface, matched with the unlocking rotary table, of the locking gear, each guide inclined plane penetrates through the corresponding unlocking hole, the locking gear is embedded in the internal tooth groove disc, and the internal tooth groove disc is fixedly connected with the backrest frame rotating arm; an extrusion slot hole is formed in the inner tooth groove disc, and a linkage lower pressing block extends into the extrusion slot hole;

2. The linked unlocking mechanism for folding the frame and the seat frame as claimed in claim 1, wherein a first housing is fixedly connected to one side of the inner fluted disc, and a first return spring is fixedly connected between the first housing and the locking gear.

3. The unlocking mechanism for linking folding of frame and seat frame as claimed in claim 2, wherein the inner fluted disc is further provided with another extrusion slotted hole for passing through the armrest locking linking block, the inner wall of the extrusion slotted hole is designed as an inclined plane, and the armrest locking linking block is fixedly connected with a return block; the fixed arm of the seat frame is hinged with a rotating arm of the armrest frame, and the return block and the rotating arm of the armrest frame are mutually limited and locked.

4. A linked unlocking mechanism for folding a frame and a seat frame as claimed in claim 3, wherein a side of the locking disc facing the locking gear is formed with a limit tooth protruding from a corresponding surface of the locking disc; correspondingly, a limiting groove is formed in the periphery of the locking gear and in a position corresponding to the limiting teeth, and the locking disc is inserted into the limiting groove through the limiting teeth so as to realize transverse limiting locking of the locking disc and the locking gear.

5. The folding linkage unlocking mechanism of the frame and the seat frame as claimed in claim 1, 2, 3 or 4, wherein a second shell is fixedly connected to one side of the rotating arm of the pushing handle, a vertical linkage block guide groove is formed on the second shell and on one side facing the unlocking linkage block, and the top, the bottom and one side facing the movable locking piece of the linkage block guide groove are open; the unlocking linkage block penetrates through the linkage block guide groove from top to bottom.

6. The folding linkage unlocking mechanism of the frame and the seat frame as claimed in claim 5, wherein an upper limit groove and a lower limit groove are formed on one side of the pushing arm, correspondingly, an upper extension part and a lower extension part are formed on the top and the bottom of the movable locking piece, the upper extension part and the lower extension part are respectively matched with the upper limit groove and the lower limit groove, and the top and the bottom of the movable locking piece are limited in the upper limit groove and the lower limit groove of the pushing arm; a central column is fixedly connected at the center of the pushing arm rotating arm and towards the side of the movable locking piece, correspondingly, a waist-shaped hole is arranged at the center of the movable locking piece, and the waist-shaped hole of the movable locking piece is sleeved on the central column, so that the movable locking piece can only move up and down along the central column.