Braking mechanism of a baby carriage

Abstract

The invention discloses a brake mechanism for a baby carriage, comprising a lower cross bar, wheel seats installed on both sides of the lower cross bar, a wheel assembly, a brake disc, a pedal member rotatable relative to the lower cross bar, and brake wires on both sides; the pedal member comprises a sleeve portion with corresponding inclined grooves at both ends and a pedal portion, a matching member slidably matched with the inclined groove is provided at the inner end of the brake wire, and a first spring is provided between the matching members on both sides, the outer end of the brake wire extends into the wheel seat and is connected to the brake assembly therein, and the brake rod of the brake assembly can brake and release the brake relative to the brake disc; a locking structure is provided between the lower cross bar and the pedal member, and an unlocking structure for releasing the lock of the locking structure is provided on the pedal member; the invention has a novel structure and is easy to operate, and brake release and brake release locking are achieved by pressing down the pedal portion of the pedal member, and braking and resetting of the pedal member are achieved by pressing down a button, and compared with a traditional brake mechanism, this operation will not dirty the shoe surface or scratch the toes.

Description

Technical Field

[0001] The invention relates to a brake mechanism of a baby carriage. Background Art

[0002] There are many kinds of baby strollers on the market. In order to ensure the safety performance of baby strollers, brake mechanisms are generally installed on baby strollers to prevent accidents when children are riding in baby strollers. Most brake mechanisms need to be operated by feet when braking. Generally, the brake pedal is stepped on to brake. When releasing the brake, the brake pedal needs to be lifted up by foot. This operation will dirty the shoe surface and even scratch the toes. Summary of the invention

[0003] The purpose of the present invention is to provide a brake mechanism for a baby carriage to overcome the above technical problems existing in the prior art.

[0004] The technical scheme of the present invention is: a brake mechanism of a baby carriage, comprising a lower cross bar installed under the frame, wheel seats installed on both sides of the lower cross bar, a wheel assembly installed on the wheel seat, a brake disc arranged on the wheel assembly, a pedal member arranged in the middle of the lower cross bar and rotatable relative to the pedal member, and a brake line located at the left and right sides of the pedal member and passing through the lower cross bar; the pedal member comprises a sleeve portion sleeved on the lower cross bar and a treading portion extending backward from the sleeve portion, corresponding oblique grooves are provided at both ends of the sleeve portion, a matching piece slidably matched with the oblique groove is provided at the inner end of the brake line, an elastic reset piece for resetting the matching piece is provided in the lower cross bar, the outer end of the brake line extends into the wheel seat and is connected to the brake assembly therein, and the brake rod of the brake assembly can be locked into or withdrawn from the corresponding relative brake disc; a locking structure is provided between the lower cross bar and the pedal member, and an unlocking structure for releasing the locking structure is provided on the pedal member;

[0005] When the pedal part of the pedal member is pressed down, the pedal member rotates and drives the matching member to move laterally inward or outward through the sliding cooperation between the inclined groove and the matching member, thereby tightening or loosening the brake line, and the brake line drives the brake rod of the brake assembly to withdraw or lock into the brake groove of the brake disc to achieve brake release or braking; at this time, the locking structure is in a locked state;

[0006] When changing the use state, the locking structure is unlocked by the unlocking structure. Under the action of the elastic reset part, the matching part moves laterally outward or inward, the pedal part resets and rotates, and the brake line drives the brake rod of the brake assembly to lock into or exit the brake groove of the corresponding brake disc to achieve braking or releasing the brake.

[0007] Furthermore, the brake assembly comprises a linkage block which is arranged on a fixed seat at one side of the wheel seat and can slide up and down relative to the fixed seat, and a brake member which is arranged on the fixed seat and can slide left and right relative to the fixed seat; a second spring is arranged between the brake member and the fixed seat, a fifth spring is arranged between the linkage block and the fixed seat, the brake rod is formed at one end of the brake member, a guide portion is convexly arranged on the side wall at the other end of the brake member, a first guide inclined surface is provided on the linkage block, and the guide portion has a second guide inclined surface which is slidably matched with the first guide inclined surface; the outer end of the brake line is connected to the linkage block;

[0008] When the mating member moves inward laterally, the brake line drives the linkage block to move upward, and the linkage block drives the brake member to move to the side away from the brake disc through the sliding cooperation between the first guide inclined surface and the second guide inclined surface, and the brake rod of the brake member exits the brake groove of the brake disc to realize the brake release;

[0009] When the mating part moves laterally outward, the brake line releases the linkage block, and the brake part moves back under the restoring action of the second spring, and its brake rod is locked into the brake groove of the corresponding brake disc to achieve braking; at the same time, the linkage block moves down and back to its position under the sliding cooperation of the first guide bevel and the second guide bevel.

[0010] Furthermore, the locking structure includes a locking groove formed at the side end of the sleeve portion of the footrest and a locking block arranged on the lower cross bar, corresponding to the locking groove and movable left and right, and a third spring is installed between the locking block and the lower cross bar; after the pedal portion of the footrest is pressed down, the locking block is aligned with the locking groove, and the locking block is locked into the locking groove under the action of the third spring, and the locking structure enters a locked state.

[0011] Furthermore, the unlocking structure includes a button arranged on the pedal and capable of moving up and down relative to the pedal, a fourth spring arranged between the button and the pedal, and an unlocking strip arranged in the locking groove of the sleeve portion and capable of moving left and right relative to the pedal, the inner end of the unlocking strip is formed with a third guide slope, and the lower part of the button is formed with a fourth guide slope slidably matched with the third guide slope; the button is exposed from the pedal to form a pressing portion; when the pressing portion of the button is pressed, the button moves downward, and the unlocking strip is driven to move laterally outward through the sliding cooperation between the third guide slope and the fourth guide slope, and the unlocking strip pushes the locking block out of the locking groove, thereby releasing the lock of the locking structure.

[0012] Furthermore, outer tubes are sleeved on both sides of the lower cross bar, the inner ends of the outer tubes are sleeved on the sleeve parts on both sides of the footrest, and a gap is provided between the two outer tubes for the treading part to be exposed and rotated.

[0013] Furthermore, the lower end of the frame has a mounting seat for assembling a wheel seat, the front part of the upper end of the wheel seat is rotatably connected to the front part of the lower end of the mounting seat, and a shock-absorbing spring is installed between the rear part of the upper end of the wheel seat and the rear part of the lower end of the mounting seat.

[0014] Furthermore, the lower cross bar is installed between the mounting seats on both sides, and the end of the lower cross bar is inserted into the upper end of the wheel seat.

[0015] Furthermore, a brake wire reversing piece is provided at the inner end of the lower cross bar, and the brake wire reversing piece has a transverse groove for the brake wire to pass through and a radial groove communicating with the transverse groove.

[0016] Furthermore, a wire groove for the brake wire to pass through and communicating with the inner cavity of the fixed seat is formed on the side wall of the wheel seat; the side end of the fixed seat has a cover plate that is snapped together with it, and the position of the cover plate corresponding to the wire groove is provided with a wire groove cover plate that cooperates with the wire groove.

[0017] Furthermore, the elastic return member is a first spring arranged between the matching members of the brake lines on both sides.

[0018] Furthermore, the inclined grooves corresponding to the two ends of the sleeve part are arranged in an inclined manner with the inside higher and the outside lower; the matching piece is arranged in the lower cross bar and can slide left and right relative to the lower cross bar, the matching piece is provided with a convex column, and the lower cross bar is provided with a guide groove for the convex column to pass through and slide, the convex column passes through the guide groove and is inserted into the inclined groove, and slidably cooperates with the inclined groove.

[0019] Furthermore, the corresponding inclined grooves at both ends of the sleeve portion are arranged in an inclined manner with the inner side higher and the outer side lower.

[0020] The advantages of the present invention are: the present invention has a novel structure and is easy to operate. By pressing down the pedal part of the footrest, the brakes on both sides can be released and locked at the same time. By pressing down the button, the brakes on both sides can be braked at the same time and the footrest can be reset. Compared with the traditional brake mechanism, this operation will not dirty the shoe surface or scratch the toes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. The accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure after the outer tube in the present invention is disassembled;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure of the pedal member when being stepped on;

[0025] Figure 4 It is a schematic diagram of the assembly structure when the footrest and the lower crossbar are at a certain angle in the present invention;

[0026] Figure 5 It is a schematic diagram of the assembly structure when the footrest and the lower crossbar are at another angle in the present invention;

[0027] Figure 6 It is a schematic diagram of the assembly structure when the wheel assembly part of the present invention is at a certain angle;

[0028] Figure 7 It is a schematic diagram of the assembly structure when the wheel assembly part of the present invention is at another angle;

[0029] Figure 8 It is a schematic diagram of the component structure of the brake assembly in the present invention.

[0030] Including: 1 frame;

[0031] 2 lower cross bar; 2-1 guide groove;

[0032] 3 wheel seat; 3-1 fixed seat; 3-2 wire slot; 3-3 cover plate; 3-4 wire slot cover plate;

[0033] 4 wheel assembly;

[0034] 5 brake disc; 5-1 brake groove;

[0035] 6 footrest; 6-1 sleeve portion; 6-2 stepping portion; 6-3 inclined groove;

[0036] 7. Brake line;

[0037] 8 matching piece; 8-1 boss;

[0038] 9 first spring;

[0039] 10 brake assembly; 10-1 linkage block; 10-1-1 first guide slope; 10-2 brake member; 10-2-1 brake lever; 10-2-2 guide portion; 10-2-2-1 second guide slope; 10-3 second spring; 10-4 fifth spring;

[0040] 11 locking structure; 11-1 locking slot; 11-2 locking block; 11-3 third spring;

[0041] 12 unlocking structure; 12-1 button; 12-1-1 fourth guide slope; 12-2 fourth spring; 12-3 unlocking bar; 12-3-1 third guide slope;

[0042] 13 external tube;

[0043] 14 mounting seat;

[0044] 15 shock spring;

[0045] 16 brake line reversing element; 16-1 transverse groove; 16-2 radial groove. DETAILED DESCRIPTION

[0046] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not limited to the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to specific conditions, and the unremarked implementation conditions are usually the conditions in routine experiments.

[0047] like Figures 1 to 8 As shown, a brake mechanism of a baby carriage comprises a lower crossbar 2 mounted below a frame 1, wheel seats 3 mounted on both sides of the lower crossbar 2, a wheel assembly 4 mounted on the wheel seat 3, a brake disc 5 arranged on the wheel assembly 4, a pedal 6 arranged in the middle of the lower crossbar 2 and rotatable relative to the lower crossbar 2, and a brake line 7 located on the left and right sides of the pedal 6 and passing through the lower crossbar 2; the pedal 6 comprises a sleeve portion 6-1 sleeved on the lower crossbar 2 and a tread portion 6-2 extending backward from the sleeve portion 6-1, and the sleeve portion 6- 1 are provided with corresponding inclined grooves 6-3 at both ends, the inner end of the brake line 7 is provided with a matching piece 8 that slides with the inclined groove 6-3, the lower cross bar 2 has an elastic reset piece for the matching piece 8 to reset, the outer end of the brake line 7 extends into the wheel seat 3 and is connected to the brake assembly 10 therein, and the brake rod 10-2-1 of the brake assembly 10 can be locked in or out of the corresponding brake disc 5; a locking structure 11 is provided between the lower cross bar 2 and the pedal 6, and an unlocking structure 12 for releasing the locking structure 11 is provided on the pedal 6.

[0048] In this embodiment, the brake assembly 10 includes a linkage block 10-1 disposed in a fixed seat 3-1 and capable of sliding up and down relative thereto, and a brake member 10-2 disposed in the fixed seat 3-1 and capable of sliding left and right relative thereto; a second spring 10-3 is disposed between the brake member 10-2 and the fixed seat 3-1, a fifth spring 10-4 is disposed between the linkage block 10-1 and the fixed seat 3-1, the brake rod 10-2-1 is formed at one end of the brake member 10-2, and a guide portion 10-2-2 is formed on the side wall of the other end of the brake member 10-2, the linkage block 10-1 has a first guide slope 10-1-1, and the guide portion 10-2-2 has a second guide slope 10-2-2-1 that is slidably matched with the first guide slope 10-1-1; the outer end of the brake line 7 is connected to the linkage block 10-1. The fixed seat 3-1 has an opening on one side close to the brake disc 5 for the brake rod 10-2-1 to extend out.

[0049] In this embodiment, the locking structure 11 includes a locking groove 11-1 formed at the side end of the sleeve portion 6-1 of the footrest 6 and a locking block 11-2 arranged on the lower cross bar 2, corresponding to the locking groove 11-1 and movable left and right, and a third spring 11-3 is installed between the locking block 11-2 and the lower cross bar 2.

[0050] In this embodiment, the unlocking structure 12 includes a button 12-1 arranged on the pedal 6 and capable of moving up and down relative to the pedal 6, a fourth spring 12-2 arranged between the button 12-1 and the pedal 6, and an unlocking strip 12-3 arranged in the locking groove 11-1 of the sleeve portion 6-1 and capable of moving left and right relative to the pedal 6, a third guide slope 12-3-1 being formed at the inner end of the unlocking strip 12-3, a fourth guide slope 12-1-1 being formed at the lower portion of the button 12-1 and slidably cooperating with the third guide slope 12-3-1; the button 12-1 is exposed from the pedal 6 to form a pressing portion.

[0051] In this embodiment, outer tubes 13 are sleeved on both sides of the lower cross bar 2. The inner ends of the outer tubes 13 are sleeved on the sleeve parts 6-1 on both sides of the pedal member 6, and a gap is provided between the two outer tubes 13 for the pedal part 6 to be exposed and rotated.

[0052] In this embodiment, the lower end of the frame 1 has a mounting seat 14 for assembling the wheel seat 3, the front portion of the upper end of the wheel seat 3 is rotatably connected to the front portion of the lower end of the mounting seat 14, and a shock-absorbing spring 15 is installed between the rear portion of the upper end of the wheel seat 3 and the rear portion of the lower end of the mounting seat 14.

[0053] In this embodiment, the lower cross bar 2 is installed between the mounting seats 14 on both sides, and the end of the lower cross bar 2 is inserted into the upper end of the wheel seat 3.

[0054] In this embodiment, a brake wire reversing member 16 is provided at the inner end of the lower cross bar 2. The brake wire reversing member 16 has a transverse groove 16-1 for the brake wire 7 to pass through and a radial groove 16-2 communicating with the transverse groove 16-1.

[0055] In this embodiment, a wire groove 3-2 is formed on the side wall of the wheel seat 3 for the brake wire 7 to pass through and communicates with the inner cavity of the fixed seat 3-1; the side end of the fixed seat 3-1 has a cover plate 3-3 that is snapped together with it, and the position of the cover plate 3-3 corresponding to the wire groove 3-2 is provided with a wire groove cover plate 3-4 that cooperates with the wire groove 3-2.

[0056] In this embodiment, the mating piece 8 is arranged in the lower cross bar 2 and can slide left and right relative to the lower cross bar 2. The mating piece 8 is provided with a boss 8-1, and the lower cross bar 2 is provided with a guide groove 2-1 for the boss 8-1 to pass through and slide. The boss 8-1 passes through the guide groove 2-1 and is inserted into the inclined groove 6-3, and slidably cooperates with the inclined groove 6-3.

[0057] In this embodiment, the elastic return member is a first spring 9 arranged between the matching members 8 of the brake cables 7 on both sides.

[0058] The present invention lists a specific embodiment as follows: As shown in the figure, the inclined grooves 6-3 corresponding to the two ends of the sleeve portion 6-1 are arranged in an inclined manner with the inner side higher and the outer side lower. In this case, when the pedal portion 6-2 of the pedal member 6 is pressed down, the brake is released; and when the locking structure 11 is unlocked by the unlocking structure 12, the brake is applied.

[0059] Here’s how it works:

[0060] When releasing the brake, the pedal part 6-2 of the pedal member 6 is pressed down, the pedal member 6 rotates and drives the inner end of the brake line 7 to move inward through the sliding cooperation between the inclined groove 6-3 and the matching member 8, the brake line 7 drives the linkage block 10-1 to move upward, the linkage block 10-1 drives the brake member 7 to move to the side away from the brake disc 5 through the sliding cooperation between the first guide inclined surface 10-1-1 and the second guide inclined surface 10-2-2-1, and the brake rod 10-2-1 of the brake member 10-2 withdraws from the brake groove 5-1 of the brake disc 5, so that the brake is released. At the same time, the pedal member 6 rotates until the locking block 11-2 is aligned with the locking groove 11-1, and the locking block 11-2 is locked into the locking groove 11-1 under the action of the third spring 11-3, and the locking structure 11 enters the locked state.

[0061] When braking, the pressing part of the button 12-1 is pressed, the button 12-1 moves downward, and the unlocking bar 12-3 moves outward laterally through the sliding cooperation between the third guide slope 12-3-1 and the fourth guide slope 12-1-1, and the unlocking bar 12-3 pushes the locking block 11-2 out of the locking groove 11-1, thereby releasing the lock of the locking structure 11. Under the action of the elastic reset member (first spring 9), the pedal member 6 resets and rotates, the brake line 7 releases the linkage block 10-1, and the brake member 10-2 moves back under the reset action of the second spring 10-3, and its brake rod 10-2-1 is locked into the brake groove 5-1 of the corresponding brake disc 5, thereby achieving braking; at the same time, the linkage block 10-1 moves back downward under the sliding cooperation between the first guide slope 10-1-1 and the second guide slope 10-2-2-1.

[0062] The present invention has a novel structure and is easy to operate. By pressing down the pedal part 6-2 of the pedal member 6, the brakes can be released and locked at the same time on both sides. By pressing down the button 12-1, the brakes can be applied at the same time on both sides and the pedal member 6 can be reset. Compared with the traditional brake mechanism, this operation will not dirty the shoe surface or scratch the toes.

[0063] On the contrary, if the inclined grooves 6-3 corresponding to the two ends of the sleeve portion 6-1 are arranged in an inclined manner with the inner side lower and the outer side higher. In this case, when the pedal portion 6-2 of the pedal member 6 is pressed down, the pedal member 6 rotates and drives the matching member 8 to move laterally outward through the sliding cooperation between the inclined groove 6-3 and the matching member 8, thereby releasing the brake line 7, and the brake member 10-2 moves back under the reset action of the second spring 10-3, driving the brake rod 10-2-1 of the brake assembly 10 to lock into the brake groove 5-1 of the brake disc 5, thereby achieving braking; at this time, the locking structure 11 is in a locked state; when the braking state is to be adjusted to a brake-released state, the locking of the locking structure 11 is released through the unlocking structure 12, and under the action of the elastic reset member (first spring 9), the matching member 8 moves laterally inward, the pedal member 6 resets and rotates, and the brake line 7 drives the brake rod 10-2-1 of the brake assembly 10 to withdraw from the corresponding brake groove 5-1 of the brake disc 5, thereby achieving brake release.

[0064] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

Claims

1. A brake mechanism for a baby carriage, characterized in that: The invention comprises a lower crossbar (2) mounted below a frame (1), wheel seats (3) mounted on both sides of the lower crossbar (2), a wheel assembly (4) mounted on the wheel seat (3), a brake disc (5) arranged on the wheel assembly (4), a pedal member (6) arranged in the middle of the lower crossbar (2) and rotatable relative to the lower crossbar (2), and a brake line (7) located on the left and right sides of the pedal member (6) and passing through the lower crossbar (2); the pedal member (6) comprises a sleeve portion (6-1) sleeved on the lower crossbar (2) and a pedal portion (6-2) extending backward from the sleeve portion (6-1), and the sleeve portion (6-1) is provided with a pair of The lower cross bar (2) has a corresponding inclined groove (6-3), the inner end of the brake line (7) is provided with a matching piece (8) that is slidably matched with the inclined groove (6-3), the lower cross bar (2) has an elastic reset piece for resetting the matching piece (8), the outer end of the brake line (7) extends into the wheel seat (3) and is connected to the brake assembly (10) therein, and the brake rod (10-2-1) of the brake assembly (10) can be locked into or out of the corresponding brake disc (5); a locking structure (11) is provided between the lower cross bar (2) and the pedal (6), and an unlocking structure (12) for unlocking the locking structure (11) is provided on the pedal (6); When the pedal portion (6-2) of the pedal member (6) is pressed down, the pedal member (6) rotates and drives the matching member (8) to move laterally inward or outward through the sliding cooperation between the inclined groove (6-3) and the matching member (8), thereby tightening or loosening the brake line (7), and the brake line (7) drives the brake rod (10-2-1) of the brake assembly (10) to withdraw from or lock into the brake groove (5-1) of the brake disc (5), thereby achieving brake release or braking; at this time, the locking structure (11) is in a locked state; When the use state is changed, the locking structure (11) is unlocked by the unlocking structure (12), and under the action of the elastic reset member, the matching member (8) moves laterally outward or inward, the pedal member (6) resets and rotates, and the brake line (7) drives the brake rod (10-2-1) of the brake assembly (10) to lock into or exit the brake groove (5-1) of the corresponding brake disc (5), thereby achieving braking or releasing the brake; The brake assembly (10) comprises a linkage block (10-1) arranged in a fixed seat (3-1) on one side of the wheel seat (3) and capable of sliding up and down relative to the fixed seat (3-1), and a brake member (10-2) arranged on the fixed seat (3-1) and capable of sliding left and right relative to the fixed seat; a second spring (10-3) is arranged between the brake member (10-2) and the fixed seat (3-1), a fifth spring (10-4) is arranged between the linkage block (10-1) and the fixed seat (3-1), and the brake lever (10- 2-1) is formed at one end of the brake member (10-2), a guide portion (10-2-2) is convexly provided on the side wall of the other end of the brake member (10-2), the linkage block (10-1) has a first guide inclined surface (10-1-1), and the guide portion (10-2-2) has a second guide inclined surface (10-2-2-1) that is slidably matched with the first guide inclined surface (10-1-1); the outer end of the brake line (7) is connected to the linkage block (10-1); The locking structure (11) comprises a locking groove (11-1) formed at a side end of a sleeve portion (6-1) of the pedal member (6) and a locking block (11-2) arranged on the lower crossbar (2), corresponding to the locking groove (11-1) and movable in left and right directions, and a third spring (11-3) is installed between the locking block (11-2) and the lower crossbar (2); after the pedal portion (6-2) of the pedal member (6) is pressed downward, the locking block (11-2) is aligned with the locking groove (11-1), and the locking block (11-2) is locked into the locking groove (11-1) under the action of the third spring (11-3), and the locking structure (11) enters a locked state; The unlocking structure (12) comprises a button (12-1) arranged on the pedal member (6) and capable of moving up and down relative to the pedal member (6), a fourth spring (12-2) arranged between the button (12-1) and the pedal member (6), and an unlocking strip (12-3) arranged in a locking groove (11-1) of the sleeve portion (6-1) and capable of moving left and right relative to the sleeve portion (6-1), wherein a third guiding inclined surface (12-3-1) is formed at the inner end of the unlocking strip (12-3), and a third guiding inclined surface (12-3-1) is formed at the lower portion of the button (12-1) and is engaged with the third guiding inclined surface (11-1). 2-3-1) a fourth guiding inclined surface (12-1-1) that is slidably matched; the button (12-1) is exposed from the pedal member (6) to form a pressing portion; when the pressing portion of the button (12-1) is pressed, the button (12-1) moves downward, and the unlocking bar (12-3) is driven to move laterally outward through the sliding match between the third guiding inclined surface (12-3-1) and the fourth guiding inclined surface (12-1-1), and the unlocking bar (12-3) pushes the locking block (11-2) out of the locking groove (11-1), thereby releasing the lock of the locking structure (11).

2. A brake mechanism for a baby carriage according to claim 1, characterized in that: The lower crossbar (2) is sleeved with outer tubes (13) on both sides, the inner ends of the outer tubes (13) are sleeved on sleeve portions (6-1) on both sides of the pedal member (6), and a notch is provided between the two outer tubes (13) for the pedal portion (6) to be exposed and rotated.

3. The brake mechanism of a baby carriage according to claim 1, characterized in that: The lower end of the frame (1) has a mounting seat (14) for assembling a wheel seat (3); the front portion of the upper end of the wheel seat (3) is rotatably connected to the front portion of the lower end of the mounting seat (14); a shock-absorbing spring (15) is installed between the rear portion of the upper end of the wheel seat (3) and the rear portion of the lower end of the mounting seat (14); the lower cross bar (2) is installed between the mounting seats (14) on both sides, and the end of the lower cross bar (2) is inserted into the upper end of the wheel seat (3); the inner end of the lower cross bar (2) is provided with a brake line reversing member (16); the brake line reversing member (16) has a transverse groove (16-1) for the brake line (7) to pass through and a radial groove (16-2) communicating with the transverse groove (16-1).

4. The brake mechanism of a baby carriage according to claim 1, characterized in that: A wire groove (3-2) is formed on the side wall of the wheel seat (3) for the brake wire (7) to pass through and communicates with the inner cavity of the fixing seat (3-1); a cover plate (3-3) is provided at the side end of the fixing seat (3-1) to be engaged therewith, and a wire groove cover plate (3-4) is provided on the cover plate (3-3) at a position corresponding to the wire groove (3-2) and to cooperate with the wire groove (3-2).

5. The brake mechanism of a baby carriage according to claim 1, characterized in that: The elastic return member is a first spring (9) arranged between the matching members (8) of the brake lines (7) on both sides.

6. The brake mechanism of a baby carriage according to claim 1, characterized in that: The matching piece (8) is arranged in the lower cross bar (2) and can slide leftward and rightward relative to the lower cross bar (2); a convex column (8-1) is provided on the matching piece (8); a guide groove (2-1) is provided on the lower cross bar (2) for the convex column (8-1) to pass through and slide; the convex column (8-1) passes through the guide groove (2-1) and is inserted into the inclined groove (6-3), and is slidably matched with the inclined groove (6-3).

7. The brake mechanism of a baby carriage according to claim 1, characterized in that: The inclined grooves (6-3) corresponding to the two ends of the sleeve portion (6-1) are arranged in an inclined manner with the inner side higher and the outer side lower.

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