CN210122987U

CN210122987U - Folding mechanism

Info

Publication number: CN210122987U
Application number: CN201920463191.3U
Authority: CN
Inventors: 黄杜磊
Original assignee: Hangzhou Guoding Medical Dressing Co Ltd
Current assignee: Hangzhou Guoding Medical Dressing Co Ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-03-03
Anticipated expiration: 2029-04-08

Abstract

The utility model discloses a folding mechanism, including first folding arm and second folding arm, be provided with the linking bridge on the first folding arm, the second folding arm articulates on the linking bridge, be provided with the spacing groove on the linking bridge, the spacing groove includes the arc wall with the pin joint as the centre of a circle, the spacing groove still includes the locking groove, the locking groove sets up the one end of keeping away from first folding arm on the arc wall, be provided with mobilizable spacer pin on the second folding arm, be provided with the spring between spacer pin and the second folding arm, the spacer pin sliding connection is in the spacing groove; and a guide mechanism which guides the limiting pin to be separated from the locking groove by rotating the second folding arm when the limiting pin is clamped into the locking groove is arranged on the second folding arm. The utility model has simple structure and simple and convenient use process, and can be widely applied to tables, chairs or other devices.

Description

Folding mechanism

Technical Field

The utility model relates to a folding technical field, in particular to folding mechanism.

Background

In daily life, many articles, such as tables, chairs, carts, etc., are designed to have a folding function so as to be folded and stored when not in use, thereby saving space. To perform the folding function, a folding mechanism is usually required. For example, chinese patent publication No.: CN 104960612A, the name of the invention is a folding mechanism and a folding vehicle, comprising a supporting component, a rotating component and a limiting component; the rotating assembly comprises an outer rotating part, an inner rotating part and a connecting part, the outer rotating part and the inner rotating part are sleeved outside the connecting part and are rotationally connected with the connecting part, and the outer rotating part is provided with at least two parts which are symmetrically distributed on the left side and the right side of the inner rotating part; the supporting component comprises a first supporting piece arranged on the outer rotating piece and a second supporting piece arranged on the inner rotating piece; the limiting assembly comprises at least two limiting pins and at least two limiting grooves, and all the limiting grooves are annularly distributed on the rotating assembly along the axis of the rotating assembly; when the limiting pin is inserted into the limiting groove, the outer rotating piece and the inner rotating piece cannot rotate relatively. The invention has the following disadvantages: after the folding mechanism is unfolded, a limiting pin needs to be inserted for positioning, when the folding mechanism is folded, the positioning pin needs to be firstly pulled out, and after the folding mechanism is folded, the positioning pin is inserted. The folding mode is troublesome to use and is not simple and convenient to operate.

Disclosure of Invention

The utility model aims at solving the problem that the operation is troublesome when current folding mechanism expandes or folds, providing a folding mechanism easy and simple to handle.

The utility model aims at realizing through the following technical scheme: a folding mechanism comprises a first folding arm and a second folding arm, wherein a connecting support is arranged on the first folding arm, the second folding arm is hinged to the connecting support, a limiting groove is arranged on the connecting support, the limiting groove comprises an arc-shaped groove taking a hinged point as a circle center, the limiting groove further comprises a locking groove, the locking groove is arranged at one end, far away from the first folding arm, of the arc-shaped groove, a movable limiting pin is arranged on the second folding arm, a spring is arranged between the limiting pin and the second folding arm, and the limiting pin is connected in the limiting groove in a sliding mode; and a guide mechanism which guides the limiting pin to be separated from the locking groove by rotating the second folding arm when the limiting pin is clamped into the locking groove is arranged on the second folding arm.

The utility model discloses when expanding, with the folding arm of second outwards rotation, when the spacer pin rotated the position department to the locking groove, the locking groove was gone into to the spacer pin card under the pulling force effect of spring, at this moment locking between first folding arm and the folding arm of second. When needs are folded, the second folding arm continues to rotate, the pin breaks away from the locking groove under the action of the guide mechanism, the first folding arm and the second folding arm are unlocked, then the second folding arm can rotate inwards, and folding is completed. The utility model has simple structure and simple and convenient use process, and can be widely applied to tables, chairs or other devices.

Preferably, the direction of the pulling force of the spring on the stopper pin is toward the other side of the opening of the locking groove.

Preferably, the guide mechanism comprises a guide groove arranged on the second folding arm, the limit pin is connected in the guide groove in a sliding manner, the guide groove comprises a first sliding groove, and a connecting line of the first sliding groove and a hinge point forms an acute angle with the axial direction of the first sliding groove; a second sliding groove is formed in one end, close to the hinge point, of the first sliding groove, the second sliding groove is formed in one side, close to the spring, of the first sliding groove, and an acute angle is formed between the axial direction of the second sliding groove and the axial direction of the spring; a transition groove is arranged in front of the opening of the locking groove, the transition groove and the arc-shaped groove are in arc transition, and the turning part of the first sliding groove and the second sliding groove is superposed with the transition groove. When the utility model discloses be in when the expansion state, the spacer pin card is gone into in the locking groove. When the folding device is folded from an unfolding state, the second folding arm is firstly rotated towards the unfolding direction, in the rotating process, the limiting pin simultaneously slides along the first sliding groove, under the guiding action of the first sliding groove, the limiting pin slides out of the locking groove and enters the transition groove, when the limiting pin moves to the turning position of the first sliding groove and the second sliding groove, the limiting pin enters the second sliding groove under the pulling force action of the spring, the limiting pin is prevented from returning to the locking groove, and then the second folding arm is folded inwards to a required position; when the limiting pin moves to the end part of the arc-shaped groove, the second folding arm continues to rotate inwards, the limiting pin is jacked back to the first sliding groove, when the limiting pin is unfolded, the second folding arm directly rotates outwards, and when the limiting pin moves to the position of the locking groove, the limiting pin is clamped into the locking groove under the action of the spring, so that locking is achieved. Through the above working mode, make the utility model discloses folding or when expanding, the operation is got up very portably.

Preferably, an avoiding groove is formed in one end, close to the first folding arm, of the arc-shaped groove. The avoidance groove is used for providing an avoidance space for the limiting pin in the process of jacking the limiting pin back to the first sliding groove from the second sliding groove.

Preferably, a through groove is formed in the second folding arm at a position corresponding to the spring. The function of logical groove provides an opening, makes things convenient for the installation of spring.

Preferably, the connecting support comprises two parallel connecting plates, the connecting plates are fixed on the first folding arm, and the second folding arm is connected between the two connecting plates.

Preferably, the connecting bracket is provided with a first hinge hole, and the second folding arm is provided with a second hinge hole corresponding to the first hinge hole; be provided with the articulated shaft between second folding arm and the linking bridge, the articulated shaft passes first hinge hole and second hinge hole simultaneously.

The utility model has the advantages that: the utility model has simple structure and simple and convenient use process, and can be widely applied to tables, chairs or other devices.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the spring installation.

Fig. 3 is a schematic structural view of the connecting bracket.

Fig. 4 is a schematic structural view of the second folding arm.

Fig. 5 is a schematic view of the position of the limiting pin when the utility model is in the open state.

In the figure: 1. first folding arm, 2, the folding arm of second, 3, linking bridge, 4, articulated shaft, 5, spacer pin, 6, spacing groove, 7, guiding groove, 8, logical groove, 9, spring, 10, first hinge hole, 11, arc wall, 12, locking groove, 13, cross the aqueduct, 14, dodge the groove, 15, second hinge hole, 16, first spout, 17, second spout.

Detailed Description

The invention will be further described with reference to the following detailed description and accompanying drawings.

Example (b): as shown in fig. 1 to 5, a folding mechanism includes a first folding arm 1 and a second folding arm 2. The first folding arm 1 and the second folding arm 2 are both tubular structures. The first folding arm 1 is provided with a connecting bracket 3. The connecting bracket 3 comprises two parallel connecting plates. The connecting plate is fixed on the first folding arm. The connecting plate is rectangular. The second folding arm 2 is connected between two connecting plates. The second folding arm 2 is hinged to the connecting bracket 3. The connecting bracket 3 is provided with a first hinge hole 10. The second folding arm 2 is provided with a second hinge hole 11 corresponding to the first hinge hole 10. And articulated shafts 4 are connected in the first articulated holes and the second articulated holes. The hinge shaft 4 simultaneously passes through the first hinge hole 10 and the second hinge hole 11. And a limiting groove 6 is arranged on the connecting bracket 3. The limiting groove 6 comprises an arc-shaped groove 11, a locking groove 12, a transition groove 13 and an avoiding groove 14, wherein the arc-shaped groove takes a hinge point as a circle center. The locking slot 12 is arranged at the end of the arc-shaped slot 11 remote from the first folding arm 1. The avoiding groove 14 is arranged at one end of the arc-shaped groove 11 close to the first folding arm 1. The locking groove 12 is semicircular. A transition groove 13 is arranged in front of the opening of the locking groove 12. The transition groove 13 and the arc-shaped groove 11 are in arc transition.

The second folding arm 2 is provided with a guide groove 7. A limit pin 5 is arranged between the first folding arm 1 and the second folding arm 2. The limiting pin 5 is of a round rod-shaped structure. The limit pin 5 simultaneously passes through the limit groove 6 and the guide groove 7. The limiting pins 5 are connected in the limiting groove 6 and the guide groove 7 in a sliding mode. A spring 9 is arranged between the limiting pin 5 and the second folding arm 2. The pulling force direction of the spring 9 on the limiting pin 5 faces to the other side of the opening of the locking groove 12. A through groove 8 is arranged at the position, corresponding to the spring 9, of the second folding arm 2. The through grooves 8 are square. The guide groove 7 comprises a first runner 16. A connecting line of the first sliding chute 16 and the hinge point forms an acute angle with the axial direction of the first sliding chute 16; one end of the first sliding chute 16 close to the hinge point is provided with a second sliding chute 17. The second sliding groove 17 is arranged on one side of the first sliding groove 16 close to the spring 9. The axial direction of the second slide groove 17 forms an acute angle with the axial direction of the spring 9. A transition groove 13 is arranged in front of the opening of the locking groove 12. The transition groove 13 and the arc-shaped groove 11 are in arc transition. The turning point of the first sliding chute 16 and the second sliding chute 17 is overlapped with the transition groove 13.

The utility model discloses when expanding, with the folding arm of second outwards rotation, when the spacer pin rotated the position department to the locking groove, the locking groove was gone into to the spacer pin card under the pulling force effect of spring, at this moment locking between first folding arm and the folding arm of second. When the folding device is folded from an unfolding state, the second folding arm is firstly rotated towards the unfolding direction, in the rotating process, the limiting pin simultaneously slides along the first sliding groove, under the guiding action of the first sliding groove, the limiting pin slides out of the locking groove and enters the transition groove, when the limiting pin moves to the turning position of the first sliding groove and the second sliding groove, the limiting pin enters the second sliding groove under the pulling force action of the spring, the limiting pin is prevented from returning to the locking groove, and then the second folding arm is folded inwards to a required position; when the limiting pin moves to the end part of the arc-shaped groove, the second folding arm continues to rotate inwards, the limiting pin is jacked back to the first sliding groove, when the limiting pin is unfolded, the second folding arm directly rotates outwards, and when the limiting pin moves to the position of the locking groove, the limiting pin is clamped into the locking groove under the action of the spring, so that locking is achieved. Through the above working mode, make the utility model discloses folding or when expanding, the operation is got up very portably.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.

Claims

1. The utility model provides a folding mechanism, includes first folding arm (1) and the folding arm of second (2), be provided with linking bridge (3) on first folding arm (1), the folding arm of second (2) articulates on linking bridge (3), be provided with spacing groove (6) on linking bridge (3), spacing groove (6) are including arc wall (11) that use the pin joint as the centre of a circle, its characterized in that: the limiting groove (6) further comprises a locking groove (12), the locking groove (12) is formed in one end, far away from the first folding arm (1), of the arc-shaped groove (11), the second folding arm (2) is provided with a movable limiting pin (5), a spring (9) is arranged between the limiting pin and the second folding arm, and the limiting pin (5) is connected in the limiting groove (6) in a sliding mode; and a guide mechanism which guides the limiting pin (5) to be separated from the locking groove (12) by rotating the second folding arm (2) when the limiting pin (5) is clamped into the locking groove (12) is arranged on the second folding arm (2).

2. A folding mechanism according to claim 1, characterized in that the direction of the pull of the spring (9) on the stop pin (5) is directed towards the other side of the opening of the locking groove (12).

3. A folding mechanism according to claim 1, characterized in that the guiding mechanism comprises a guiding groove (7) provided on the second folding arm (2), the stop pin (5) being slidably connected in the guiding groove (7), the guiding groove (7) comprising a first runner (16), the line connecting the first runner (16) and the hinge point forming an acute angle with the axial direction of the first runner (16); a second sliding groove (17) is arranged at one end, close to the hinge point, of the first sliding groove (16), the second sliding groove (17) is arranged at one side, close to the spring (9), of the first sliding groove (16), and an acute angle is formed between the axial direction of the second sliding groove (17) and the axial direction of the spring (9); a transition groove (13) is arranged in front of the opening of the locking groove (12), the transition groove (13) and the arc-shaped groove (11) are in arc transition, and the turning part of the first sliding groove (16) and the second sliding groove (17) is overlapped with the transition groove (13).

4. A folding mechanism according to claim 1, 2 or 3, characterized in that the curved slot (11) is provided with an escape slot (14) near the end of the first folding arm (1).

5. A folding mechanism according to claim 1, 2 or 3, characterized in that the second folding arm (2) is provided with a through slot (8) at a position corresponding to the spring (9).

6. A folding mechanism according to claim 1, characterized in that the connecting bracket (3) comprises two mutually parallel connecting plates, which are fixed to the first folding arm (1) and between which the second folding arm (2) is connected.

7. A folding mechanism according to claim 1, characterized in that said connecting bracket (3) is provided with a first hinge hole (10), and said second folding arm (2) is provided with a second hinge hole (15) corresponding to said first hinge hole (10); be provided with articulated shaft (4) between second folding arm (2) and linking bridge (3), articulated shaft (4) pass first hinge hole (10) and second hinge hole (15) simultaneously.