CN209604417U

CN209604417U - A kind of locking joint and children dinning chair

Info

Publication number: CN209604417U
Application number: CN201822130640.0U
Authority: CN
Inventors: 祁衡
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2019-11-08
Anticipated expiration: 2028-12-18

Abstract

The utility model discloses a kind of locking joint and children dinning chairs, and structure is simple, convenient for unlocking and rod piece can be unfolded or be folded to special angle.The one end for locking first bar in joint is connected with the first connector, the one end of second bar is connected with the second connector, the one end of third bar is connected with third connector, first connector, the second connector and third connector rotate connection, there is lock tooth, the first connector opens up the first locked groove, the second locked groove is offered on third connector on locking piece, when locking joint is in unfolded state, lock tooth position is in the first locked groove and the second locked groove so that the first connector and third connector locking；When folding or in folded state, lock tooth is detached from the first locked groove or the second locked groove；The second one-directional rotation position-limit mechanism that locking joint further includes the first one-directional rotation position-limit mechanism for only allowing the first connector relative second tab to be rotated in a first direction when folding and third connector relative second tab is only allowed to be rotated in a second direction, in folding, first direction and second direction are opposite.

Description

Locking joint and child dining chair

Technical Field

The utility model relates to a children's articles for use field, in particular to locking joint and have this kind of locking articulated children's dining chair.

Background

Currently, children's products such as dining chairs are usually designed to be foldable so as to be foldable to reduce the volume, thereby facilitating storage or transportation. The locking joint is a component which is generally applied to locking of rods which are rotatably connected in children products such as child dinning chairs and the like, so that the rods can be stably unfolded or mutually closed after being unlocked, and then the unfolding or folding of the child dinning chairs is realized. However, the existing locking joint is complicated in structure.

Disclosure of Invention

The utility model aims at providing a locking joint and children's dining chair, its simple structure, the unblock is convenient and the member can expand or fold to specific angle.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a locking joint, includes first pole, second pole, third pole and locking piece, an end connection of first pole has first joint, an end connection of second pole has the second to connect, an end connection of third pole has the third to connect, first joint the second connect and the third connects and rotates mutually to be connected just the second connects to be located first joint with between the third connects, the locking tooth has on the locking piece, first joint seted up with lock tooth matched with first locked groove, set up on the third connect with lock tooth matched with second locked groove, locking joint has expansion state and fold condition, works as when locking joint is expansion state, the lock tooth is located in first locked groove with in the second locked groove so that first joint with the third connects the locking, first pole, second pole and locking piece, The second rod and the third rod are oppositely unfolded; when the locking joint is folded or in a folded state, the locking teeth are separated from the first locking groove or the second locking groove, and the first rod and the third rod are respectively close to the second rod;

the locking joint further comprises a first one-way rotation limiting mechanism which only allows the first joint to rotate relative to the second joint along a first direction when the locking joint is folded and a second one-way rotation limiting mechanism which only allows the third joint to rotate relative to the second joint along a second direction when the locking joint is folded, wherein the first direction and the second direction are opposite, one of the first direction and the second direction is clockwise, and the other one of the first direction and the second direction is anticlockwise.

Furthermore, the first unidirectional rotation limiting mechanism comprises a first protrusion and a first sliding groove which are matched with each other, one of the first protrusion and the first sliding groove is arranged on the first joint, and the other one of the first protrusion and the first sliding groove is arranged on the second joint;

the second unidirectional rotation limiting mechanism comprises a second protrusion and a second sliding groove which are matched with each other, one of the second protrusion and the second sliding groove is arranged on the second joint, and the other one of the second protrusion and the second sliding groove is arranged on the third joint;

the first sliding groove and the second sliding groove are arc-shaped grooves respectively, the first sliding groove and the second sliding groove are provided with two end portions respectively, when the locking joint is in a unfolding state, the first protrusion is located at one end portion of the first sliding groove, and the second protrusion is located at one end portion of the second sliding groove.

Specifically, the first protrusion is disposed on the first joint, and the first sliding groove is disposed on the second joint; the second protrusion is arranged on the second joint, and the second sliding groove is arranged on the third joint; the first sliding groove is provided with a first end portion and a second end portion which are arranged along a first direction, the second sliding groove is provided with a first end portion and a second end portion which are arranged along the first direction, when the locking joint is in an unfolded state, the first protrusion is located in the first end portion of the first sliding groove, and the second protrusion is located in the first end portion of the second sliding groove.

Furthermore, the first joint, the second joint and the third joint are rotatably connected through a rotating shaft.

Preferably, the center of the arc formed by the first sliding chute and the second sliding chute is located on the axis of the rotating shaft.

Furthermore, the locking joint further comprises a slidable unlocking piece and a sliding block arranged between the first joint and the locking piece, and the unlocking piece and/or the sliding block are/is provided with an unlocking inclined plane.

Furthermore, the unlocking piece is slidably arranged on the lower end part of the first rod, the lower end part of the first rod is inserted into the first joint, a traction cable penetrates through the first rod, and the traction cable is connected with the unlocking piece.

Further, the first joint, the second joint and the third joint are respectively provided with a cavity therein, and the locking piece is slidably disposed in the cavity.

Furthermore, an elastic part for resetting the locking part is arranged in the locking part and the third joint.

The utility model discloses still adopt following technical scheme:

a child's dining chair comprising a tray, a seat and a locking knuckle as described above, the tray and the seat being connected to a first bar, a second bar and a third bar.

Combine above-mentioned, the utility model adopts the above technical scheme, compare prior art and have following advantage:

the first joint and the third joint are locked through the locking piece, and the second joint is prevented from rotating through the first unidirectional rotation limiting mechanism and the second unidirectional rotation limiting mechanism, so that the whole locking joint is simple in structure, and locking and unlocking are convenient. And the first unidirectional rotation limiting mechanism and the second unidirectional rotation limiting mechanism can limit the rotation angle of the first rod and the third rod relative to the second rod, so that the first rod and the third rod are unfolded to a specified angle or folded to a specific flat structure.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a perspective view of a locking joint according to the present invention in an expanded state;

FIGS. 2 and 3 are exploded views of the locking joint of FIG. 1 partially from two different perspectives;

FIG. 4 is a cross-sectional view of a portion of the locking joint of FIG. 1 taken along the axis of the shaft;

FIG. 5 is a schematic view of the first unidirectional rotation limiting mechanism of FIG. 1;

FIG. 6 is a schematic view of a second unidirectional rotation limiting mechanism of FIG. 1;

FIGS. 7 and 8 are side views of the revolute joint when folded;

FIG. 9 is a perspective view of the revolute joint in a folded state;

fig. 10 is a perspective view of a child dining chair according to the present invention.

Wherein,

100. a locking joint; 200. a dinner plate; 300. a seat; 400. a support bar;

1. a first lever; 10. a first joint; 101. a first locking groove; 2. a second lever; 20. a second joint; 3. a third lever; 30. a third joint; 301. a second locking groove; 4. a rotating shaft; 5. a locking member; 51. locking teeth; 6. unlocking the lock; 61. unlocking the inclined plane; 7. a slider; 71. unlocking the inclined plane; 8. a first unidirectional rotation limiting mechanism; 81. a first protrusion; 82. a first chute; 821. a first end portion; 822. a second end portion; 9. a second unidirectional rotation limiting mechanism; 91. a second protrusion; 92. a second chute; 921. a first end portion; 922. a second end portion.

Detailed Description

The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables the advantages and features of the invention to be more readily understood by those skilled in the art. The directional terms recited herein are defined in the art from the usual perspective of a stroller when in the unfolded state and for convenience of description.

The present embodiment provides a locking joint. Referring to fig. 1 to 9, the locking joint 100 includes a first rod 1, a second rod 2, a third rod 3, and a locking member 5, wherein a first joint 10 is connected to an end of the first rod 1, a second joint 20 is connected to an end of the second rod 2, a third joint 30 is connected to an end of the third rod 3, the first joint 10, the second joint 20, and the third joint 30 are rotatably connected, and the second joint 20 is located between the first joint 10 and the third joint 30. Specifically, the first joint 10, the second joint 20 and the third joint 30 are rotatably connected by a rotating shaft 4, and the rotating shaft 4 sequentially passes through the first joint 10, the second joint 20 and the third joint 30. The first joint 10, the second joint 20 and the third joint 30 respectively have a cavity therein, the cavities of the three are communicated with each other, the locking member 5 is slidably disposed in the cavity, and the locking member 5 is preferably slidably sleeved on the rotating shaft 4 along the rotating shaft 4. The locking member 5 has a locking tooth 51, the locking tooth 51 extends outward in the radial direction of the locking member 5, and the locking tooth 51 is preferably plural and arranged at intervals in the circumferential direction of the locking member 5. The inner wall of the first joint 10 is provided with a first locking groove 101 matched with the locking tooth 51, and the inner wall of the third joint 30 is provided with a second locking groove 301 matched with the locking tooth 51. The locking joint 100 has an unfolded state and a folded state, when the locking joint 100 is in the unfolded state, the locking tooth 51 is positioned in the first locking groove 101 and the second locking groove 301 to lock the first joint 10 and the third joint 30, and the first rod 1, the second rod 2 and the third rod 3 are unfolded relatively; when the locking joint 100 is folded or in a folded state, the locking tooth 51 is disengaged from the first locking groove 101 or the second locking groove 301, and the first bar 1 and the third bar 3 are drawn toward the second bar 2, respectively, to be folded. The inner wall of the second connector 20 is not provided with a locking groove, and after the first connector 10 and the third connector 30 are unlocked, the first connector 10 and the third connector 30 can rotate relative to the second connector 20.

As shown in fig. 2-3 and 5-6, the locking joint 100 further includes a first unidirectional rotation limiting mechanism 8 that only allows the first joint 10 to rotate in a first direction relative to the second joint 20 when folded, and a second unidirectional rotation limiting mechanism 9 that only allows the third joint 30 to rotate in a second direction relative to the second joint 20 when folded, wherein the first direction and the second direction are opposite, one of the directions is clockwise, and the other direction is counterclockwise. That is, when the locking joint 100 is in the unfolded state, the second joint 20 cannot rotate even when the first joint 10 and the second joint 20 are locked by the locking member 5 due to the constraint of the first unidirectional rotation limiting mechanism 8 and the second unidirectional rotation limiting mechanism 9, so that the first rod 1, the second rod 2, and the third rod 3 are stably in the unfolded state. Namely, the first joint 10 and the third joint 30 are locked by the locking member 5, and the second joint 20 is prevented from rotating by the first unidirectional rotation limiting mechanism 8 and the second unidirectional rotation limiting mechanism 9, so that the locking joint 100 has a simple overall structure, and is convenient to lock and unlock. And the first unidirectional rotation limiting mechanism 8 and the second unidirectional rotation limiting mechanism 9 can also limit the rotation angle of the first rod 1 and the third rod 3 relative to the second rod 2, so that the first rod 1 and the third rod 3 can be unfolded to a designated angle or folded to a specific flat structure (as shown in fig. 9).

The first unidirectional rotation limiting mechanism 8 includes a first protrusion 81 and a first sliding groove 82 which are matched with each other, one of the first protrusion 81 and the first sliding groove 82 is disposed on the first joint 10, and the other is disposed on the second joint 20. The second unidirectional rotation limiting mechanism 9 includes a second protrusion 91 and a second sliding groove 92, which are matched with each other, one of the second protrusion 91 and the second sliding groove 92 is disposed on the second joint 20, and the other is disposed on the third joint 30. The first slide groove 82 and the second slide groove 92 are arc-shaped grooves, respectively, the first slide groove 82 and the second slide groove 92 have two end portions, respectively, and when the locking joint 100 is in the unfolded state, the first protrusion 81 is located at one end portion of the first slide groove 82, and the second protrusion 91 is located at one end portion of the second slide groove 92. The center of the arc formed by the first sliding groove 82 and the second sliding groove 92 is located on the axis of the rotating shaft 4.

In the embodiment, the first protrusion 81 is disposed on the first joint 10, and the first sliding slot 82 is disposed on the second joint 20; the second protrusion 91 is disposed on the second joint 20, and the second sliding groove 92 is disposed on the third joint 30. As shown in fig. 5, the first chute 82 has a first end 821 and a second end 822 arranged in a first direction (the direction indicated by arrow a in fig. 5 and 6); as shown in fig. 6, the second slide groove 92 has a first end 921 and a second end 922 arranged in a first direction (the direction indicated by arrow a in fig. 5 and 6), and when the locking joint 100 is in the expanded state, the first projection 81 is located in the first end 821 of the first slide groove 82, and the second projection 91 is located in the first end 921 of the second slide groove 92. In this embodiment, the number of the second protrusions 91 is two, the number of the second sliding grooves 92 is two, and each second protrusion 91 corresponds to one second sliding groove 92. The principle of the locking of the second joint 20 by the first unidirectional rotation stopper mechanism 8 and the second unidirectional rotation stopper mechanism 9 is explained as follows: when the locking joint 100 is in the unfolded state, as shown in fig. 5, the second joint 20 cannot rotate in the counterclockwise direction because the first protrusion 81 is located at the first end 821 of the first sliding slot 82 on the second joint 20 and is blocked by the first protrusion 81; as shown in fig. 6, since the second protrusion 91 of the second joint 20 is located at the first end 921 of the second sliding slot 92 and is blocked by the slot wall of the second sliding slot 92, the second joint 20 cannot rotate in the clockwise direction; it can be seen that the second connector 20 is blocked by the two-sided stop mechanism and can neither be rotated in a clockwise direction nor in a counterclockwise direction, thereby being locked between the first connector 10 and the third connector 30. When the first joint 10 and the third joint 30 are unlocked, the first joint 10 rotates counterclockwise in fig. 5, the first protrusion 81 slides in the first sliding groove 82, and after sliding to the second end 822 of the first sliding groove 82, the first rod 1 and the second rod 2 are close to each other; when the third joint 30 rotates clockwise in fig. 6, the second sliding groove 92 slides relative to the second protrusion 91, and when the second protrusion 91 is located at the second end 922 of the second sliding groove 92, the second rod 2 approaches the third rod 3. When the locking joint 100 is unfolded and the first protrusion 81 slides to the first end 821 of the first sliding groove 82, the first lever 1 stops rotating and is unfolded to a specific angle; when the second slide groove 92 slides relative to the second protrusion 91 until the second protrusion 91 is located at the first end 921 of the second slide groove 92, the third lever 3 stops rotating and is unfolded to a specific angle.

The locking joint 100 further comprises a slidable unlocking piece 6 and a sliding block 7 arranged between the unlocking piece 6 and the locking piece 5, wherein the unlocking piece 6 and/or the sliding block 7 are/is provided with an unlocking inclined surface, namely at least one of the two parts is provided with an unlocking inclined surface which is in contact fit with the other part. Specifically, the unlocking member 6 is slidably disposed in the first joint 10, preferably in a direction perpendicular to the axial line of the rotating shaft 4, for example, the unlocking member 6 is slidably inserted in the first joint 10 in the up-down direction. The unlocking member 6 is disposed on the lower end portion of the first rod 1 in a vertically slidable manner, and the lower end portion of the first rod 1 is inserted into the first joint 10. The unlocking member 6 has an unlocking inclined surface 61, the slider 7 has an unlocking inclined surface 71, the unlocking inclined surfaces 61 and 71 are in contact fit, and the unlocking inclined surfaces 61 and 71 are respectively inclined downward gradually in the direction from the first joint 10 to the third joint 30. Further, the unlocking member 6 is connected to a traction cable, which passes through the first rod 1. Therefore, when the pulling rope is pulled, the unlocking piece 6 moves upwards, the unlocking inclined surface of the sliding block 7 is contacted with the unlocking inclined surface of the unlocking piece 6, the sliding block 7 is pushed to approach the third joint 30 under the action of the unlocking inclined surface, and the locking piece 5 is pushed to the inside of the third joint 30, so that the locking piece is separated from the first locking groove 101 of the first joint 10, and the unlocking is realized. Preferably, the sliding block 7 is slidably sleeved on the rotating shaft 4.

The locking joint 100 further includes an elastic member (not shown) for restoring the locking member 5, and when the first and third bars 1 and 3 are unfolded to a certain angle and cannot be further rotated, the elastic member is restored to allow the locking member 5 to enter the first joint 10, and the locking teeth 51 of the locking member 5 are inserted into the first locking groove 101.

This embodiment also provides a child dining chair comprising a tray 200, a seat 300 and the locking joint 100, the tray 200 and the seat 300 being connected to the first bar 1. Specifically, the first bar 1 is slidably sleeved with a support bar 400, the plate 200 and the seat 300 are disposed on the support bar, and the lower ends of the second bar 2 and the third bar 3 are supported to support the whole child dining chair.

As shown in fig. 1, when the above-described locking joint 100 is in the unfolded state, the first rod 1, the second rod 2, and the third rod 3 are relatively unfolded; as shown in fig. 7 and 8, when the above-described locking joint 100 is folded, the first rod 1 and the third rod 3 are respectively drawn toward the second rod 2 in the direction indicated by the arrows in the drawing; as shown in fig. 9, when the above-described locking joint 100 is in the folded state, the first lever 1, the second lever 2, and the third lever 3 are close to each other, and specifically, the upper end portion of the first lever 1, the lower end portion of the second lever 2, and the lower end portion of the third lever 3 are close to each other.

The above-mentioned embodiments are only for illustrating the technical idea and features of the present invention, and are preferred embodiments, so that those skilled in the art can understand the contents of the present invention and implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A locking joint, includes first pole, second pole, third pole and locking piece, an end connection of first pole has first joint, an end connection of second pole has the second to connect, an end connection of third pole has the third to connect, first joint, the second connects and the third connects and rotates mutually and connect just the second connects to be located first joint with between the third connects, its characterized in that: the locking piece is provided with a locking tooth, the first joint is provided with a first locking groove matched with the locking tooth, the third joint is provided with a second locking groove matched with the locking tooth, the locking joint has an unfolding state and a folding state, when the locking joint is in the unfolding state, the locking tooth is positioned in the first locking groove and the second locking groove so that the first joint and the third joint are locked, and the first rod, the second rod and the third rod are unfolded relatively; when the locking joint is folded or in a folded state, the locking teeth are separated from the first locking groove or the second locking groove, and the first rod and the third rod are respectively close to the second rod;

the locking joint further comprises a first one-way rotation limiting mechanism which only allows the first joint to rotate relative to the second joint along a first direction when the locking joint is folded and a second one-way rotation limiting mechanism which only allows the third joint to rotate relative to the second joint along a second direction when the locking joint is folded, wherein the first direction is opposite to the second direction.

2. The locking joint of claim 1, wherein: the first unidirectional rotation limiting mechanism comprises a first protrusion and a first sliding groove which are matched with each other, one of the first protrusion and the first sliding groove is arranged on the first joint, and the other one of the first protrusion and the first sliding groove is arranged on the second joint;

3. The locking joint of claim 2, wherein: the first protrusion is arranged on the first joint, and the first sliding groove is arranged on the second joint; the second protrusion is arranged on the second joint, and the second sliding groove is arranged on the third joint; the first sliding groove is provided with a first end portion and a second end portion which are arranged along a first direction, the second sliding groove is provided with a first end portion and a second end portion which are arranged along the first direction, when the locking joint is in an unfolded state, the first protrusion is located in the first end portion of the first sliding groove, and the second protrusion is located in the first end portion of the second sliding groove.

4. The locking joint of claim 2, wherein: when the locking joint is in a folded state, the first projection is located at the other end portion of the first slide groove, and the second projection is located at the other end portion of the second slide groove.

5. The locking joint of claim 1, wherein: the locking joint further comprises a slidable unlocking piece and a sliding block arranged between the first joint and the locking piece, and the unlocking piece and/or the sliding block are/is provided with an unlocking inclined plane.

6. The locking joint of claim 5, wherein: the unlocking piece is slidably arranged on the lower end portion of the first rod, the lower end portion of the first rod is inserted into the first connector, a traction rope penetrates through the first rod, and the traction rope is connected with the unlocking piece.

7. The locking joint of claim 1, wherein: the first joint, the second joint and the third joint are rotationally connected through a rotating shaft.

8. The locking joint of claim 7, wherein: the locking piece can be sleeved on the rotating shaft in a sliding manner along the rotating shaft.

9. The locking joint of claim 1, wherein: the first joint, the second joint and the third joint are respectively provided with a cavity, and the locking piece is slidably arranged in the cavity.

10. A child dining chair, which is characterized in that: comprising a tray, a seat and a locking joint according to any one of claims 1 to 9, said tray and said seat being connected to said first bar, said second bar and said third bar being braced.