Leg mechanism with telescopic main footrest

Abstract

The utility model discloses a leg mechanism with a telescopic main foot rest. The leg mechanism with the telescopic main footrest comprises a multi-connecting-rod structure, the multi-connecting-rod structure is connected with a main footrest support, and the main footrest support is connected with a main footrest mounting plate in a sliding mode. According to the utility model, the problem that the leg mechanism cannot be completely opened under the condition that the cloth is not damaged is solved.

Description

Technical Field

[0001] This utility model relates to the field of home furnishing manufacturing, and in particular to a retractable leg mechanism for the main footrest. Background Technology

[0002] Currently, movable chairs suffer from low packing quantities and high transportation costs. To address this, a design was proposed that the backrest be foldable while simultaneously reducing the seat height. This would allow the backrest to be folded up and folded to fit the seat during packing, reducing the chair's footprint and thus increasing packing capacity while lowering transportation costs. However, lowering the seat height also shortens the length of the fabric connecting the main footrest and the seat cushion (the connection between the main footrest, seat cushion, and fabric can be found in Chinese invention patent CN104323617B, entitled "A Sofa," which discloses a soft connecting material that is actually a fabric or leather cover). This results in the leg mechanism not being able to fully open without damaging the fabric. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a retractable leg mechanism for the main footrest that can be fully opened without damaging the fabric.

[0004] To achieve the above objectives, the technical solution adopted by the retractable leg mechanism of the main footrest of this utility model is as follows:

[0005] A retractable leg mechanism for the main footrest includes a multi-link structure, the multi-link structure being connected to a main footrest bracket, and the main footrest bracket being slidably connected to a main footrest mounting plate.

[0006] Preferably, the main support plate bracket includes a plate part one connected to a multi-link structure, and a plate part two slidably connected to the main support plate.

[0007] Preferably, the main support mounting plate is provided with a guide groove, and the second plate is provided with at least two guide pins that are inserted into the guide groove.

[0008] Preferably, a return spring is provided between the main support mounting plate and the plate.

[0009] Preferably, the multi-link structure includes a leg link one and a leg link two. The front end of the leg link one is pivotally connected to the tail end of the plate one, and the rear end of the leg link one is pivotally connected to a leg link three. The front end of the leg link two is pivotally connected to the tail end of the plate one, and the rear end of the leg link two is pivotally connected to a leg link four. The front part of the leg link four is pivotally connected to the rear part of the leg link one.

[0010] Preferably, the leg link one is provided with a limit pin, and the leg link four is provided with a retractable limit surface and an unfoldable limit surface that cooperate with the limit pin.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] When the multi-link structure drives the main support mounting plate to flip outward, the fabric can pull the main support mounting plate to slide backward on the main support plate bracket, so that the main support mounting plate can also flip into place while ensuring that the fabric is not damaged. Attached Figure Description

[0013] Figure 1 This is a diagram showing the extended leg mechanism of the main footrest of this utility model in its unfolded state.

[0014] Figure 2 This is a diagram showing the retractable leg mechanism of the main footrest of this utility model in its retracted state.

[0015] Figure 3 This is a front view of a multi-link structure.

[0016] Figure 4 This is a schematic diagram illustrating the application of the extendable leg mechanism of the main footrest of this utility model.

[0017] The components include: 1. Multi-link structure; 11. Leg link one; 111. Limiting pin; 12. Leg link two; 13. Leg link three; 14. Leg link four; 141. Retracting limiting surface; 142. Expanding limiting surface; 2. Secondary footrest mounting plate; 3. Main footrest bracket; 31. Plate one; 311. Hanging pin; 32. Plate two; 321. Guide pin; 4. Main footrest mounting plate; 41. Guide groove; 42. Through hole; 5. Return spring. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0019] like Figure 1-4As shown, a retractable leg mechanism for a main footrest includes a multi-link structure 1, which includes a leg link 11 and a leg link 2 12. The rear end of the leg link 1 is pivotally connected to a leg link 3 13, the middle part of the leg link 1 is pivotally connected to a secondary footrest mounting plate 2, the tail end of the secondary footrest mounting plate is pivotally connected to the leg link 2, the rear end of the leg link 2 is pivotally connected to a leg link 4 14, the front part of the leg link 4 is pivotally connected to the rear part of the leg link 1, a limiting pin 111 is installed in the middle of the leg link 1, and the leg link 4 has a retractable limiting surface 141 and a retractable limiting surface 142 that cooperate with the limiting pin. The front end is connected to the main foot support bracket 3, which includes a plate 31. The tail of the plate 31 is pivotally connected to the leg connecting rods 1 and 2 respectively. The front of the plate 31 is fixedly connected to the plate 2 32. The plate 2 is slidably connected to the main foot mounting plate 4. The main foot mounting plate has a guide groove 41. The plate 2 is equipped with two guide pins 321 that are inserted into the guide groove. The distance between the two guide pins is less than the length of the guide groove. The guide pins have both a guiding function and a limiting function to prevent the main foot mounting plate from slipping off the plate 2. The front end of the plate 311 is equipped with a hanging pin 311. The main foot mounting plate has a through hole 42. A return spring 5 is installed between the through hole and the hanging pin.

[0020] The specific working process and principle of the telescopic leg mechanism of the main footrest of this utility model are as follows: When unfolded, the multi-link structure extends forward under the driving force, causing the main footrest bracket and the main footrest mounting plate to flip outward. The main footrest mounting plate is subjected to the relative tension of the fabric, which overcomes the tension of the return spring and moves relative to the plate along the two guide pins without affecting the unfolding of the main footrest bracket; when retracted, the multi-link structure retracts backward under the driving force, causing the main footrest bracket and the main footrest mounting plate to flip inward. The main footrest mounting plate is reset by the tension of the return spring.

[0021] This invention, combined with a foldable backrest, minimizes the height of the seat cushion, enabling the movable chair to have a larger packing capacity and thus reducing transportation costs.

Claims

1. A retractable leg mechanism for the main footrest, characterized in that: It includes a multi-link structure, which is connected to a main foot support bracket, and the main foot support bracket is slidably connected to a main foot mounting plate.

2. The retractable leg mechanism of the main footrest according to claim 1, characterized in that: The main support plate bracket includes a plate component one connected to a multi-link structure, and a plate component two that is slidably connected to the main support plate.

3. The retractable leg mechanism of the main footrest according to claim 2, characterized in that: The main support mounting plate is provided with a guide groove, and the second plate is provided with at least two guide pins that are inserted into the guide groove.

4. The retractable leg mechanism of the main footrest according to claim 3, characterized in that: A return spring is provided between the main support mounting plate and the first plate.

5. The retractable leg mechanism of the main footrest according to claim 2, characterized in that: The multi-link structure includes a leg link one and a leg link two. The front end of the leg link one is pivotally connected to the tail end of the plate one, and the rear end of the leg link one is pivotally connected to a leg link three. The front end of the leg link two is pivotally connected to the tail end of the plate one, and the rear end of the leg link two is pivotally connected to a leg link four. The front part of the leg link four is pivotally connected to the rear part of the leg link one.

6. The retractable leg mechanism of the main footrest according to claim 5, characterized in that: The leg link is provided with a limit pin, and the leg link is provided with a retractable limit surface and an unfoldable limit surface that cooperate with the limit pin.

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