CN102424066B - Locking device of folding children's cart - Google Patents

Abstract

The invention relates to a locking device of a folding type children cart, wherein two ends of the locking device are rotationally connected with the folding type children cart and comprise a first stay, a second stay, a lock catch, a compression torsion spring, a spacer bush and a rivet, the rivet sequentially penetrates through holes in the spacer bush, the second stay and the first stay, and the spacer bush sequentially penetrates through waist holes in the compression torsion spring and the lock catch; a right-angle bending part is arranged on the first stay, and two notches are respectively arranged at two ends of the right-angle bending part; the second stay is rotatably connected to the inner side of the right-angle bending part of the first stay; the lock catch is provided with a hook part which is in a bidirectional U-shaped hook shape, the lock catch is provided with a hemispherical bulge, the lower edge of the lock catch is partially turned out to form a limiting lug, the upper edge of the lock catch extends out to form two flanges, and the two flanges correspond to the notches at the two ends of the right-angle bending part of the first stay; the second stay is provided with a positioning hole corresponding to the hemispherical bulge of the lock catch. The locking device of the folding stroller only has one independent locking mechanism, so that the structure of the whole stroller is simplified.

Description

Locking device for folding stroller

technical field

The invention belongs to the technical field of children's stroller manufacturing, and in particular relates to a locking device for a foldable children's stroller.

Background technique

The national standard stipulates the folding locking device for children's strollers as follows: The folding locking device should prevent the child from being accidentally folded in the car and when the child is taken out or put into the stroller. In order to avoid the danger of accidentally folding the stroller due to unintentional operation by adults or children, at least one locking device should be installed on the vehicle, and the release of the locking device should meet one of the following requirements: 1. Two independent actions, acting on two independent Mechanism; 2. Two consecutive actions, and when the second action is executed, the first action should be in a maintained state. In order to avoid the danger of incomplete opening, the vehicle should have at least one locking device that is automatically activated when the cart is opened. Existing foldable strollers for children all adopt the locking structure of two independent mechanisms, and realize the release purpose through the independent actions of the two independent mechanisms. However, for the children's stroller, two independent mechanisms are adopted, and its structure seems relatively complicated.

Contents of the invention

The invention discloses a locking device for a foldable baby stroller, which has an independent locking mechanism with a simple structure, and the locking mechanism meets the safety requirements of the national standard for children's strollers.

The present invention adopts the following technical solutions: a locking device for a folding baby stroller, the two ends of the locking device are rotatably connected to the folding baby stroller, the locking device includes a first stay, a second stay, a lock, a twist Spring, spacer, rivet, described rivet passes through the hole on the spacer, the second stay and the hole on the first stay successively, and the spacer passes through the waist hole of the compression torsion spring and the lock buckle successively; the first There is a right-angle bending part on the stay, and a gap is provided at both ends of the right-angle bending part; the second stay is rotatably connected to the inner side of the right-angle bending part of the first stay; the lock is provided with a hook , the hook is in the shape of a two-way U-shaped hook, and the lock is provided with a hemispherical protrusion. The lower edge of the lock partially turns out a limit ear, and two flanges protrude from the upper edge. The gaps at both ends of the right-angle bending part of the first stay correspond to each other; the second stay is provided with a positioning hole corresponding to the hemispherical protrusion of the lock.

Preferably, a flanging opposite to that of the limiting ear is provided on the lower edge of the hook portion near the buckle.

Preferably, the compression torsion spring is in the shape of a truncated cone, with a twisted edge protruding from both ends of the compression torsion spring. The lower edge of a stay bar touches against each other.

The locking device of the folding stroller of the present invention only has an independent locking mechanism, which simplifies the structure of the whole vehicle, and the locking mechanism meets the safety requirements of the national standard for the stroller.

Description of drawings

Fig. 1 is a structural schematic diagram of a locking device and a stroller frame.

Figure 2 is an exploded structural view of the locking device.

Fig. 3 is a front view of the locking device in a locked state.

Fig. 4 is a cross-sectional view along line A-A of Fig. 3 .

Fig. 5 is a B-B sectional view of Fig. 3 .

Fig. 6 is a top view of the locking device in a locked state.

Fig. 7 is a rear view of the locking device in a locked state.

Fig. 8 is a front view of the locking device in a released state.

Fig. 9 is a C-C sectional view of Fig. 8 .

Fig. 10 is a top view of the locking device in a released state.

Figure 11 is a rear view of the locking device in a released state.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1-11, the locking device A of the folding stroller in this embodiment includes a first stay 1, a second stay 2, a lock 3, a compression torsion spring 4, a spacer 5, and a rivet 6. The outer end of a stay 1 is hinged with the right back frame tube 8 of the umbrella handle type stroller frame B, and the outer end of the second stay 2 is hinged with the left back frame tube 9 of the umbrella handle type stroller frame B .

The inner end of the first stay 1 has a hole, and correspondingly, the inner end of the second stay 2 also has a hole 2-1, and the rivet 6 passes through the spacer 5 and the inside of the second stay 2 in turn. The end hole 2-1 and the inner end hole of the first stay 1. The second stay 2 is in partial contact with the inner end of the first stay 1 , and the two ends of the spacer 5 respectively abut against the back of the head of the rivet 6 and the second stay 2 . The second stay 2 , the first stay 1 and the rivet 6 can all rotate relative to each other.

The upper side of the first stay 1 is bent 90 degrees toward the second stay 2 to form a right-angle bending part 1-1, and a gap is respectively provided at both ends of the bending part 1-1, that is, a gap 1-2, 1 -3. The right angle bending part 1 - 1 is above the second stay 2 , and the distance from the upper side of the second stay 2 to the rivet 6 is smaller than the distance from the bent bottom of the first stay 1 to the rivet 6 .

The compression torsion spring 4 is in the shape of a truncated cone, and its two ends respectively stretch out a torsion edge 4-2, 4-3.

The upper edge of the buckle 3 forms two flanges 3-1, 3-2, and the distance between the two flanges is slightly larger than the distance between the two notches 1-2, 1-3 of the first stay 1 . There is a waist hole 3-3 on the lock buckle 3. The buckle 3 has a hook, which is in the shape of a two-way U-shaped hook, that is, the front of the hook is opposite to the back of the hook and is misaligned, so that the hook is U-shaped from the front and side. A limit ear 3-6 is partly turned out from the lower edge of the lock buckle 3, and there is a turn-over 3-7 opposite to the limit ear 3-6 on the lower edge near the hook. The spacer 5 passes through the waist hole 3-3 on the compression torsion spring 4 and the lock buckle 3, and the two ends of the pressure torsion spring 4 press against the back of the head of the lock buckle 3 and the rivet 6 respectively. The locking buckle 3 is attached to the second stay 2 , and the locking buckle 3 and the spacer 5 can rotate relative to each other. The locking buckle 3 also forms a hemispherical protrusion 3-4 on the side of the second stay 2, and correspondingly, a positioning hole 2-2 is opened on the second stay 2. The torsion edge 4-2 of the compression torsion spring 4 is positioned on the upper edge 3-5 of the buckle 3, and the torsion edge 4-3 is positioned on the lower edge 1-4 of the first stay 1.

When unfolding the baby carriage: firstly unfold the baby carriage, then press down the middle part of the locking device, and unfold it until the upper edge of the second stay 2 touches against the right-angle bending part 1-1 of the first stay 1 . In the process of pressing down the middle part of the locking device to expand it: the right-angled bending part of the first stay 1 pushes the top surface of the flange 3-2 on the buckle 3 until the upper edge of the second stay 2 is in contact with the first stay 1 The right-angle bending portion 1-1 touches against each other, and at the same time, the protrusion 3-4 on the buckle 3 slides into the positioning hole 2-2 on the second stay 2 under the pressure of the torsion spring 4, and Under the elastic force of the compression torsion spring 4, the flange 3-2 on the buckle 3 slides into a notch 1-3 of the right-angle bending part of the first stay 1, and at the same time, the two torsion sides of the compression torsion spring 4 Under the action of torsional force, the flange 3-1 on the buckle 3 is located at the other notch of the right angle bending part of the first stay 1; Inside the U-hook. At this time, the locking device is in a locked state, and the stroller cannot be folded without an unlocking action.

When the folding stroller is in operation, pull down the flange 3-7 on the buckle 3 to rotate the buckle 3 until the hook is separated from the lower edge 2-3 of the second stay 2, and then press the buckle 3 toward Push the torsion spring 4 in the direction until its hook leaves the plane where the second stay 2 is located, at this moment, the second stay 2 can rotate clockwise. Referring to Figure 8-11, in this state, the stroller is unlocked and can be folded.

During the unlocking and folding process of the locking device: the protrusion 3-4 on the lock catch 3 breaks away from the positioning hole 2-2 of the second stay 2, and touches against the corresponding surface of the second stay 2, while the flange 3-2 The top surface is in contact with the inner surface of the right-angle bending part of the first stay 1 . The flange 3 - 1 on the buckle 3 is always located at the notch of the right-angle bending part of the first stay 1 .

When the locking device is in the unlocked and folded state: the lock 3 is subjected to an unexpected force, and the flange 3-1 on the lock 3 touches the notch at one end of the right-angle bending part 1-1 on the first stay 1 Touch, and the limit ear 3-6 on the buckle 3 touches against the back of the head of the rivet 6. Its purpose is to prevent the flange 3-2 on the buckle 3 from sliding into the gap at one end of the right-angle bending part 1-1 on the first stay 1 under the action of unexpected force on the buckle 3, thereby causing the above-mentioned The locking mechanism of the foldable stroller does not work.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than as a limitation of the present invention, as long as within the scope of the present invention, changes and modifications to the above embodiments will fall within the scope of the present invention. In the protection scope of the present invention.

Claims (3)

1. the blocking device of Foldable baby trolley, the two ends of this blocking device are rotationally connected with Foldable baby trolley, it is characterized in that: described blocking device comprises the first stay, the second stay, snap close, pressure torsion spring, spacer, rivet, described rivet passes hole on spacer, the second stay and the hole on the first stay successively, and spacer passes the waist hole of pressing torsion spring and snap close successively;

Described the first stay is provided with a right angle bending part, and the two ends of this right-angle folding turn of bilge respectively are provided with a breach; The right-angle folding turn of bilge that is connected in the first stay inboard described the second stay rotary type;

Described snap close is provided with a hook portion, this hook portion is that two-way U-shaped is hook-shaped, and snap close is provided with hemispherical projections, and a position-limiting ear is routed up in the part, lower edge of snap close, two flanges are stretched out in the upper edge, and these two flanges are corresponding with the two ends breach of the right-angle folding turn of bilge of the first stay;

Described the second stay is provided with the knock hole corresponding with the hemispherical projections of snap close.

2. the blocking device of described Foldable baby trolley according to claim 1 is characterized in that: be provided with one in the hook portion lower edge of nearly snap close and turn over to opposite flange with position-limiting ear.

3. the blocking device of described Foldable baby trolley according to claim 1, it is characterized in that: described pressure torsion spring is the truncated cone spiral fashion, its two ends are respectively stretched out and are reversed the limit, press the both ends of the surface of torsion spring to contact mutually with rivet, snap close respectively, and two reverse the limit and contact mutually with snap close upper edge, the first stay lower edge respectively.

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