CN2813405Y - Baby stroller brake mechanism - Google Patents

Abstract

A brake mechanism for a stroller, comprising: a connecting base frame mounted on a frame of the baby carriage, a pedal unit, two wheels, and two brake units. The connecting pedestal comprises a sleeve which utilizes a pipe wall to define a transverse channel, and an elongated slot which is arranged around a central axis of the channel is arranged on the pipe wall; and the pedal unit includes: the wheels are arranged on the connecting base frame and controlled by the brake unit at the same side, and can perform braking and braking releasing actions. By means of the design of the sleeve and the linkage rod which are coaxially sleeved, the purpose of single-step double braking can be achieved, necessary elements can be simplified, and the appearance of the brake mechanism is more concise.

Description

Baby stroller brake mechanism

technical field

The utility model relates to a braking mechanism for a baby carriage, in particular to a braking mechanism for a baby carriage which can simultaneously control the synchronous braking or release of the wheels on both sides by a single stepping action.

Background technique

Referring to Fig. 1, 2, 3, it is the perspective view of the British early publication number 2 380 235A patent application for invention, and the three-dimensional exploded view and combined bottom view of some components. This conventional baby carriage 1 includes: a skeleton 11, two The wheels 12 installed below the two rear foot bars 111 of the framework 11 at intervals from left to right, and a brake mechanism 2 installed between the rear foot bars 111, wherein the wheels 12 all have a wheel axle 121, and a rotatably mounted The wheel seat 122 on the wheel shaft 121 is provided with a plurality of locking holes 123 surrounding a rotation center of the wheel shaft 121 on the side of the wheel seat 122 facing the rear leg 111 .

And this brake mechanism 2 comprises: a pedal pivot 21 erected between the rear foot bars 111, a pedal 22 rotatably installed on the pedal pivot 21, two left and right intervals and respectively adjacent to the braking unit of the wheel 12 on the same side 23. A mounting rod 24 installed horizontally between the mounting seats 231 of the brake units 23, and two pushing rods 25 that are spaced left and right and are sleeved on the mounting rod 24 so that they can move left and right. The pedal 22 has a fulcrum portion 221 for the pedal pivot 21 to pass through and form a yaw fulcrum, a stepping portion 222 extending backward, and a control portion 223 extending forward for the installation rod 24 to pass through. The width of part 223 is to increase gradually, wherein the position with smaller width is a normal support section 224, and the position with larger width is a brake support section 225, and these push rods 25 then have the control of one and pedal 22 The pushed end 251 against which the part 223 rests, and a connecting end 253 connected in a laterally movable manner by a positioning pin 252 and the mounting seat 231. Each brake unit 23 also has a bayonet pin 232 parallel to the wheel shaft 121, An elastic element 233 against the locking pin 232 , and a fixing pin 234 connecting the elastic element 233 and the locking pin 232 .

When the baby stroller 1 was in a non-braking position shown by the solid line in Fig. 3 in the past, the bayonet pins 232 of the braking units 23 were retracted in the mounting seat 231, that is to say, in this state, the pedal 22 The normal supporting section 224 with a small upper width is interposed between the pushed ends 251 of the push rods 25 , and the locking pin 232 is not locked with any locking hole 123 on the wheel 12 . When stepping on the stepping part 222 of the pedal 22, the brake support section 225 with a larger width on the control part 223 is gradually moved up and pushes the push rod 25 outward on both sides, and the positioning pins 252 will be displaced outward. And as shown in the imaginary line in Figure 3, push the elastic element 233 out, and finally drive the fixed pin 234 and the bayonet pin 232 to move outward. When the hole 123 is inside, the braking mechanism 2 of the stroller 1 will switch to a braking position, and the wheel 12 will not be able to rotate at this moment.

Although the design of the braking mechanism 2 of the conventional stroller 1 can achieve the purpose of single-stepping and double-braking, in order to achieve the above purpose, there are many necessary components, which is not only troublesome to assemble, but also increases the manufacturing cost. However, the conventional braking mechanism 2. In addition to the pedal 22, there are pedal pivots 21, two push rods 25, mounting rods 24 and other components at the pedaling position. So many components are assembled at the rear and lower part of the stroller 1, which will also cause complicated Appearance.

Utility model content

The purpose of the utility model is to provide a single-step double-brake baby stroller brake mechanism with simple structure, easy assembly, and simple appearance.

The brake mechanism of the utility model is installed under a frame of the stroller, and includes: a connecting base frame erected on the frame, a pedal unit, two wheels, and two brake units. The utility model is characterized in that: the connection base frame includes a casing that utilizes a tube wall to define a transverse channel, and a long groove around a central axis of the channel is opened on the tube wall; and the pedal unit includes: a A connecting rod rotatably inserted in the channel, a pedal inserted on the casing, two brake control seats spaced left and right and combined with the connecting rod in continuous rotation, and a long slot and connected The linkage assembly that moves the linkage rod and the pedal, and the wheels are installed on the connection base frame, and are controlled by the brake control seat on the same side, so that the wheels can be braked and released.

With the simple design of coaxial sleeve and linkage rod, in addition to achieving the purpose of single pedal and double brake, it can also simplify the necessary components, and at the same time make the appearance of the whole brake mechanism more concise.

Description of drawings

The braking mechanism of the baby carriage of the present utility model is described in detail below by the preferred embodiment and the accompanying drawings, in the accompanying drawings:

Figure 1 is a perspective view of the UK Early Publication No. 2 380 235A patent application for invention;

Fig. 2 is an incomplete exploded perspective view of the British patent application;

Fig. 3 is an incomplete bottom view of the British patent application, the part of the solid line in the figure shows that a braking mechanism of the stroller is in a non-braking position, and the part of the phantom line shows that the braking mechanism is in a position brake position;

Fig. 4 is a three-dimensional exploded view of a preferred embodiment of the braking device of the present invention;

Fig. 5 is a schematic diagram of the assembly of the preferred embodiment installed on a stroller;

Fig. 6 is an incomplete combined sectional view of the preferred embodiment, showing a pedal unit of the braking device alone;

Figure 7 is an incomplete stereoscopic enlarged view of the preferred embodiment;

Fig. 8 is an incomplete perspective exploded view of the preferred embodiment, showing a braking unit of the braking device separately;

Fig. 9 is an incomplete side sectional view of the preferred embodiment, the position in the figure is matched with Fig. 6, and the braking mechanism is in a non-braking position;

Figure 10 is a combined side view similar to Figure 6; and

Fig. 11 is a side sectional view similar to Fig. 9, the position in the figure matches that of Fig. 10, and the braking mechanism is in a braking position.

Detailed ways

Referring to Figures 4 and 5, a preferred embodiment of the brake mechanism 30 of the present invention is installed on the rear and lower side of a frame 31 of a stroller 3, and the frame 31 has two pivot joints that are spaced from left to right and extend backward. The seat 32 , each pivotal seat 32 includes two side walls 321 spaced left and right, and a top wall 322 connected above the side walls 321 .

Referring to Figures 4, 6, and 7, the brake mechanism 30 includes: a connecting base 4 spanning below the pivotal seats 32, a pedal unit 5, two left and right spaced wheels 6, and two adjacent The brake unit 7 of the wheel 6 on the same side.

The connection base frame 4 of the present utility model comprises: a sleeve pipe 41 with a circular cross section, two pairs of pivot joints 42 spaced left and right and protruding from a pipe wall 411 of the sleeve pipe 41 to the pivot joint seat 32 on the same side, two The pivotal shafts 43 passing through the pivotal pieces 42 and the side walls 321 of the pivotal seat 32 respectively, two wheel shaft installation rods 44 spaced left and right and extending backward from the pipe wall 411, two spaced left and right and connected The spring frame plate 45 between the axle installation rod 44 and the pipe wall 411, and two buffer springs 46 spaced left and right. The casing 41 also has a channel 412 defined by the tube wall 411 , and a long groove 413 surrounding a central axis of the channel 412 is defined at the center of the tube wall 411 . And these spring frame plates 45 respectively correspond up and down with the top wall 322 of the same-side pivot seat 32, and these buffer springs 46 are propped between the top wall 322 and the spring frame plate 45 of the same side, thereby allowing the entire connection The base frame 4 can use the pivot shafts 43 as fulcrums to produce a shock absorbing effect.

The pedal unit 5 of the present utility model includes: a linkage rod 51 rotatably threaded in the channel 412 of the casing 41, a linkage assembly 52 installed in a shaft channel 511 of the linkage rod 51, a A pedal 54 sleeved on the bushing 41 , two left and right spaced brake control seats 55 , and two torsion springs 56 . Wherein the linkage rod 51 also has two linkage ends 512 protruding from the channel 412 respectively, and the brake control seats 55 are fixedly installed on one of the linkage ends 512 of the linkage rod 51 by means of two screws 57 respectively, Each brake control seat 55 has a disc wall 551, a surrounding ring wall 552 covering from the disc wall 551 to the linkage end 512 of the linkage rod 51, and a radially protruding cam wall from the surrounding ring wall 552 to the rear. 553, and a spring clamping wall 554 radially protruding forward and upward from the surrounding ring wall 552, and a rearward cam surface 555 is provided on the cam wall 553. The pedal 54 is composed of two blocks that are fixed up and down, and has a sleeve portion 541 that is sleeved on the surface of the pipe wall 411 of the sleeve 41, and a stepping portion 542 that extends backward from the sleeve portion 541. .

The linkage assembly 52 has a linkage block 521 set in the shaft channel 511, and a pedal coupling shaft 522 connecting the linkage block 521 and the pedal portion 542 of the pedal 54. One end of the pedal coupling shaft 522 is inserted into the It is arranged in a linkage hole 523 of the linkage block 521 , and the other end is inserted into the stepping portion 542 of the pedal 54 . These torsion springs 56 all have a fixed foot 561 hooked on one of the pivot pieces 42 connecting the base frame 4, and a torsion foot 562 hooked on the spring wall 554 of the brake control seat 55 on the same side. .

When the stepping part 542 of the pedal 54 is stepped on, it can drive the pedal connecting shaft 522 and the linkage block 521 to rotate together, and finally drive the brake control seat 55 fixed on the linkage end 512 of the linkage rod 51 to rotate a predetermined angle. value.

Each wheel 6 of the present utility model all comprises: a wheel shaft 61 on the wheel shaft installation bar 44 that one transverse installation connects pedestal 4, and a wheel seat 62 that is rotatably installed on the wheel shaft 61 (as shown in Figure 5, in The outer peripheral surface of the wheel base 62 also has a wheel surface that can roll on the ground), and the wheel base 62 has several protruding ribs 620 that surround a rotation center of the wheel shaft 61 and protrude radially, and several intervening The locking holes 621 between the adjacent protruding ribs 620 .

Referring to Figures 4 and 8, each brake unit 7 of the present utility model includes a brake base 71 between the brake control seat 55 and the wheel shaft 61 on the same side. Wall 711, a rear end wall 712 connected to the chamber wall 711 rear, a lug piece 713 that protrudes from the rear end wall 712 and passes through for the wheel shaft 61 on the same side, two connecting base frame 4 from the chamber wall 711 The wheel shaft installation rod 44 extends and surrounds the base wing 714, and two fixed shafts 715 that fix the base wing 714 to the wheel shaft installation rod 44. On the outer square part, a notch 716 is provided on the circular part for the cam wall 553 of the brake control seat 55 to extend into the chamber 710, and a hole 717 is formed on the circular part and the rear edge of the square part.

Each brake unit 7 also includes a locking block 72 movably installed in the chamber 710, a return spring 73 pushed between a circular control portion 721 of the locking block 72 and the rear end wall 712, A control push rod 74 located between the cam wall 553 and the control part 721, and a push spring 75 that is sleeved on the control push rod 74, and the above-mentioned locking block 72 also has a latch that can protrude from the port 717. The latch portion 722 , and the rear end of the control push rod 74 penetrates into the control portion 721 of the latch block 72 , and its front end forms a pushed surface 741 against the cam wall 553 .

Referring to Figures 4, 6, and 9, when the brake mechanism 30 of the present invention is in a non-braking position, the pedal connecting shaft 522 is upwardly swiveled to the upper position adjacent to the long groove 413, and is now connected to the pedal connecting shaft 522. The cam wall 553 on the moving brake control seat 55 has not abutted against the pushed surface 741 of the control push rod 74, and is pushed by the return spring 73, and the locking part 722 of the locking block 72 is retracted into the opening 717. That is to say, in this state, the locking portion 722 is not engaged with any locking hole 621 on the wheel seat 62, and the wheel 6 can rotate freely.

Referring to Fig. 4, 10, 11, when the braking mechanism 30 is to be switched from the non-braking position of Fig. 9 to a braking position of Fig. 11, its mode of operation is at first stepped on the pedal part 542 of the pedal 54, so that the whole pedal 54 is connected with the casing. 41 as the center pivots downward, and simultaneously drives the pedal coupling shaft 522, the linkage block 521, the linkage lever 51 and the brake control seats 55 on both sides to rotate clockwise together (illustrated in the direction of Figure 11) . When the brake control seat 55 rotates a predetermined angle value, two actions will occur, one of which is that the cam wall 553 will enter the chamber 710 through the gap 716 of the brake base 71, and push the control push rod 74 to move backward. position, by the action of the push spring 75, the locking block 72 can be displaced backward against the force of the return spring 73, when the locking part 722 of the locking block 72 protrudes from the opening 717 and is inserted into the wheel When one of the locking holes 621 of the seat 62 is inside, the braking mechanism 30 will switch to the braking position at this time, so that the wheel seat 62 cannot rotate.

In particular, the purpose of installing the push spring 75 between the locking block 72 and the control push rod 74 in the present invention is to make the locking block 72 have elastic force at the moment of locking, because when the locking block 72 moves backward During the protruding and locking process, the locking portion 722 of the locking block 72 may correspond to the protruding rib 620 of the wheel base 62 . At this time, it is necessary to push the stroller slightly to rotate the wheel base 62 so that one of the locking holes 621 corresponds to the locking part 722 of the locking block 72. When the locking part 722 cannot be instantly locked into one of the locking holes 621 One time, by the design of the push spring 75, the locking piece 72 can keep the elastic force protruding towards the wheel base 62 at any time, so that when the wheel base 62 rotates so that one of the locking holes 621 corresponds to the locking portion 722, The aforementioned locking block 72 can protrude at any time to perform the action of locking the brake.

And another action of the brake control seat 55 of the present utility model when rotating is to drive the torsion spring 56 to swing with a fixed point 563 on the fixed foot 561 as a fulcrum, that is to say, when the brake mechanism 30 is in the position shown in Figure 9 When the non-braking position is shown, a torsion point 564 of the torsion foot 562 of the torsion spring 56 is located below a line 58 connecting the fixed point 563 and a rotation center 510 of the linkage rod 51 . When the spring retaining wall 554 of the brake control seat 55 rotates clockwise by an angle, the entire torsion spring 56 will swing with the fixed point 563 as the fulcrum, and when the torsion point 564 rotates to the top of the connecting line 58, the entire pedal Unit 5 will then be positioned at a top dead center, that is, it will be positioned at the braking position.

In the same way, when the operator pulls the pedal 54 up with his feet, in addition to making the cam wall 553 rotate counterclockwise to release the pushing action on the control push rod 74, the return spring 73 can push the locking block 72 forward. Pushing out, the spring clamping wall 554 that rotates counterclockwise will also gradually move and cross the connection line 58. At this time, the torsion spring 56 will be converted to the position of the lower dead point, so that the entire braking mechanism 30 is positioned at the non-braking position.

As can be seen from the above description, the brake mechanism 30 of the present invention can not only achieve the purpose of single-stepping and double-braking, but its necessary components are also simpler than the previous baby carriages. 54), or both sides are used to clamp the position of the wheel 6, the configuration of the components is very simple, and the above advantages can not only make the assembly more convenient, but also reduce the assembly and manufacturing costs.

Claims (8)

1. A brake mechanism for a stroller, installed on a frame of the stroller, comprising: a connecting base frame erected on the frame, a pedal unit, and two pedal units respectively installed on the left and right sides of the connecting base frame wheels, and two brake units installed on the left and right sides of the connecting base frame; it is characterized in that: The connection base frame includes a sleeve tube that defines a transverse channel by a pipe wall, and a long slot around a central axis of the channel is opened on the sleeve wall, and the pedal unit includes: a sleeve that is rotatably worn on the A linkage rod in the channel, a pedal for stepping on, two brake control seats spaced left and right and rotated with the linkage rod, and a linkage assembly passing through the long slot and linking the linkage rod and the pedal, These brake units are controlled by the brake control seat on the same side, and can brake and release the brake action on the wheels on the same side. 2. The brake mechanism of baby stroller as claimed in claim 1, wherein the linkage rod has two linkage ends on opposite sides protruding from the channel, and the brake control seats have a fixed ground The surrounding ring wall installed on the linkage end, and a cam wall protruding radially from the surrounding ring wall, and these wheels all include a wheel shaft installed on the connecting base frame, and a wheel shaft rotatably installed on the wheel shaft and Wheel bases provided with at least one locking hole, the brake units include a brake base fixedly mounted on the connection base, and a brake mounted elastically loaded in a chamber of the brake base block; when the brake mechanism is switched from a non-braking position to a braking position, the pedal will drive the linkage lever and the brake control seat to rotate an angle value, at this time the cam wall on the brake control seat will rotate and push the locking block face the wheel base, and at the same time let the locking block engage in one of the locking holes of the wheel base. 3. The brake mechanism of baby stroller as claimed in claim 2, wherein each brake unit further comprises a return spring for pushing the latch seat away from the wheel axle, a control push rod, and an intervening control push rod. The push spring between the push rod and the locking block, and the cam walls of the brake control seats push the control push rod and push the locking block towards the wheel shaft direction by the pushing spring. 4. The brake mechanism of baby stroller as claimed in claim 2, characterized in that: the brake control seats also have a spring clamping wall protruding radially from the surrounding ring wall, and the connecting base further includes a self-supporting The pivotal piece protruding from the tube wall of the casing, the pedal units also include two torsion springs spaced left and right, each torsion spring has a fixed foot fixed on the pivotal piece, and a brake mounted on the same side The torsion foot on the spring card wall of the control seat, the above-mentioned fixed foot is fixed on the pivotal piece to form a fixed point, and a connection line is formed between this fixed point and a rotation center of the brake control seat, and the torsion foot is installed on the spring The position on the clamping wall forms a torsion point; when the brake mechanism switches between the braking position and the non-braking position, the aforementioned torsion points are respectively located on opposite sides of the connecting line, so that the pedal unit remains in a fixed state. 5. The brake mechanism of baby stroller as claimed in claim 1, characterized in that: the connecting base further comprises two pairs of pivot joints spaced left and right and pivotally connected to the vehicle frame through a pivot shaft respectively. piece, two axle installation rods extending backward from the tube wall of the bushing at intervals on the left and right, two spring frame plates protruding from the tube wall, and two buffer springs against the frame and the spring frame plate, And these wheels all comprise a wheel shaft that is installed on the wheel shaft mounting rod, and a wheel base that is rotatably installed on the wheel shaft. 6. The brake mechanism of baby stroller as claimed in claim 1, characterized in that: the linkage rod has a transverse shaft, and the linkage assembly has a linkage block installed in the shaft, and a through Go out long groove and link the pedal connecting shaft of link block and pedal. 7. The brake mechanism for baby stroller as claimed in claim 6, characterized in that: the pedal has a sheathing part which is sheathed outside the tube wall of the casing and forms a pivot point, and a part extending backward and connecting with the pedal The connecting shaft is fixed and interlocking stepping part. 8. The brake mechanism of baby stroller according to claim 1, characterized in that: the brake control seats all have a surrounding ring wall fixedly installed on one of the two linkage ends of the linkage rod, and A spring clamping wall protruding radially from the surrounding ring wall, and the connecting base also includes a pivot piece protruding from the tube wall of the sleeve, and the pedal units also include two left and right spaced torsion springs, each Each torsion spring has a fixed foot fixed on the pivotal piece, and a torsion foot installed on the spring card wall of the brake control seat on the same side. The position where the above-mentioned fixed foot is fixed on the pivotal piece forms a fixed point. A connection line is formed between the fixed point and a rotation center of the brake control seat, and the position where the torsion foot is installed on the spring clamping wall forms a torsion point; when the brake mechanism switches between the braking position and the non-braking position, the aforementioned torsion point They are located on the opposite side of the connecting line to keep the pedal unit in a fixed state.

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