Leg rest extension manual and electric integrated mechanism

Abstract

The present invention discloses a manual and electric integrated leg rest extension mechanism, comprising a seat frame and a front seat pot installed on the seat frame, an extension seat pot that can slide forward and backward is arranged on the front seat pot, a manual locking assembly or an electric locking assembly is arranged between the front seat pot and the extension seat pot, and the manual locking assembly and the electric locking assembly can be replaced. The leg rest extension mechanism of the present invention can be controlled manually or electrically, and when the two control modes are respectively adopted, only the locking assembly needs to be replaced, and there is no need to change the structure of the seat frame, the front seat pot and the extension seat pot, thereby realizing the commonality and interchangeability of the electric and manual extension leg rests, and greatly saving the design development and production costs while meeting the market demand for differentiated functional configurations.

Description

Technical Field

[0001] The invention belongs to the field of chair leg rest extension mechanisms, and in particular relates to a manual and electric integrated leg rest extension mechanism. Background Art

[0002] The leg rest extension mechanism of a car seat can improve the riding comfort of passengers. The existing leg rest extension mechanisms are all single manual or electric mechanisms and are not interchangeable. The high-end version of the same car model is usually equipped with an electric leg rest extension mechanism, and the low-end version is usually equipped with a manual leg rest extension mechanism. Therefore, two different front seat pans, extended seat pans and slides need to be designed for the same car model to accommodate the two leg rest extension mechanisms, which greatly increases the design and production costs. Summary of the invention

[0003] In view of the above technical problems, the present invention aims to provide a manual and electric integrated mechanism for extending a leg rest which can be used both manually and electrically.

[0004] To this end, the technical solution adopted by the present invention is: a manual and electric integrated leg rest extension mechanism, including a seat frame and a front seat pan installed on the seat frame, an extension seat pan that can slide back and forth is provided on the front seat pan, and a manual locking assembly or an electric locking assembly is provided between the front seat pan and the extension seat pan, and the manual locking assembly and the electric locking assembly can be interchangeable.

[0005] Preferably, the front seat basin is high on the left and right sides and low in the middle, and has mounting flanges formed on the left and right sides for fixing on the seat frame;

[0006] The extended seat pot is installed in the middle of the front seat pot through the slide block assembly. The middle of the extended seat pot protrudes upward, so that a locking assembly installation space is formed between the front seat pot and the extended seat pot, which is used for replacing the manual locking assembly and the electric locking assembly. With the above structure, the middle of the front seat pot is low, which is convenient for installing the extended seat pot and avoiding the front end of the seat being too high; the middle of the extended seat pot protrudes, which is convenient for installing the locking assembly and supports the foam at the same time.

[0007] Preferably, the front side and both left and right sides of the extended seat basin are provided with upwardly protruding support flanges, and the support flanges are flush with the upper end surface of the middle part of the extended seat basin. With the above structure, the support flanges are not only used to support the foam, but also can improve the strength of the extended seat basin, effectively preventing the extended seat basin from deformation.

[0008] Preferably, the manual locking assembly includes an unlocking handle and a locking claw, the middle part of the unlocking handle can be rotatably mounted on the handle bracket, the front end of the unlocking handle extends out of the extended seat basin, the middle part of the locking claw can be rotatably mounted on the locking claw bracket, the front end of the locking claw is located below the rear end of the unlocking handle, the handle bracket and the locking claw bracket are both fixed on the extended seat basin, locking holes evenly distributed front and back are provided on the front seat basin, the rear end of the locking claw cooperates with the locking holes, when the unlocking handle is lifted to rotate, the rear end of the unlocking handle rotates downward, and drives the front end of the locking claw to rotate downward, so that the rear end of the locking claw withdraws from the locking hole to achieve unlocking, and the locking claw and the unlocking handle can return under the drive of their respective return springs. With the above structure, the manual locking assembly is cleverly designed, the locking claw is driven by the unlocking handle to avoid too small a rotation space for the locking claw, and unlocking is achieved in a limited space by the linkage of the unlocking handle and the locking claw. At the same time, unlocking can only be achieved by pulling the unlocking handle upward, which can effectively prevent passengers from accidentally unlocking due to leg pressure downward, and prevent misunderstanding of locking the extended seat basin.

[0009] Preferably, the handle bracket is an N-shaped structure, the horizontal section of which is fixed on the extended seat basin, the unlocking handle is installed between the two vertical sections of the handle bracket through a pin shaft, the unlocking handle is provided with a notch extending from the middle to the rear end, the rear end of the unlocking handle is bent upward, and a pressure rod for driving the locking claw is provided between the groove walls on both sides of the notch;

[0010] The front end of the locking claw bracket extends into the notch, and the rear end is bent upward and then bent forward to form a mounting portion for fixing on the extended seat basin. A locking claw mounting lug and a locking claw hole are provided in the middle of the locking claw bracket. The locking claw hole is located behind the locking claw mounting lug. The locking claw is installed on the locking claw mounting lug through a pin shaft. The front end of the locking claw is located below the pressure rod, and the rear end claw passes downward through the locking claw hole. With the above structure, the manual locking assembly has a compact structure, occupies a small space, and is easy to install.

[0011] Preferably, the electric locking assembly is an electric screw nut mechanism, which is fixedly mounted on the front seat pan, and the extended seat pan is fixedly connected to a driving nut of the electric screw nut mechanism, so that the extended seat pan can slide forward and backward under the drive of the transmission motor. With the above structure, the electric locking assembly is simple and reliable and easy to implement.

[0012] Preferably, the front end of the extended seat basin is provided with a baffle extending downward, the baffle is located in front of the front seat basin, and a notch for the unlocking handle to pass through is provided in the middle of the baffle. With the above structure, the baffle is used to support and fix the face cover, and at the same time, it plays a role in limiting the extended seat basin.

[0013] Preferably, the manual locking assembly and the electric locking assembly are both detachably mounted by bolts. With the above structure, the installation is convenient and the installation structure is stable and reliable.

[0014] The beneficial effects of the present invention are as follows: the leg rest extension mechanism of the present invention can be controlled manually or electrically, and when the two control methods are respectively adopted, only the locking assembly needs to be replaced without changing the structure of the seat frame, the front seat pan and the extended seat pan, thereby achieving the commonality and interchangeability of the electric and manual extended leg rests, and while meeting the market's demand for differentiated functional configurations, greatly saving design, development and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a manual leg rest extension mechanism;

[0016] Figure 2 It is a structural schematic diagram of the electric leg rest extension mechanism;

[0017] Figure 3 for Figure 2 Schematic diagram of the decomposition structure;

[0018] Figure 4 is a structural schematic diagram of a manual locking assembly;

[0019] Figure 5 for Figure 4 Schematic diagram of the decomposition structure;

[0020] Figure 6 It is a structural schematic diagram of the electric locking component. DETAILED DESCRIPTION

[0021] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0022] like Figures 1 to 6 As shown, a manual and electric integrated leg rest extension mechanism is mainly composed of a seat frame 1, a front seat pan 2, an extended seat pan 3, a slide block assembly 11, a manual locking assembly and an electric locking assembly. The manual locking assembly is composed of an unlocking handle 4, a locking claw 5, a handle bracket 6, a locking claw bracket 7 and a return spring 8, and the electric locking assembly is an electric screw nut mechanism 10.

[0023] like Figures 1 to 3As shown, the front seat pan 2 is fixedly mounted on the seat frame 1. The front seat pan 2 adopts a structure with high left and right sides and low middle part, which is convenient for installing the extended seat pan 3 to prevent the front part of the seat from being too high and affecting the riding comfort. Two rows of locking holes 201 are arranged evenly spaced front and back in the middle of the front seat pan 2. The left and right sides of the front seat pan 2 are bent upward, outward and then downward to form an "n"-shaped installation flange 202. The sheet metal parts on the left and right sides of the seat frame 1 are respectively embedded in the corresponding installation flange 202, which is convenient for the seat frame 1 and the front seat pan 2 to be fixedly connected by welding and bolts. The extended seat basin 3 can be slidably installed on the front seat basin 2 back and forth. In the present embodiment, the extended seat basin 3 is installed in the middle of the front seat basin 2 by means of a slide slider assembly 11. The slide of the slide slider assembly 11 is fixed on the front seat basin 2, and the slider of the slide slider assembly 11 is fixed on the extended seat basin 3. The slide slider assembly 11 adopts a thin structure to reduce the occupied space. The middle part of the extended seat basin 3 protrudes upward, so that a locking assembly installation space is formed between the front seat basin 2 and the extended seat basin 3, which is convenient for replacing the manual locking assembly and the electric locking assembly, and also plays a role in supporting the foam. The protruding part of the extended seat basin 3 is an "n"-shaped structure with its opening facing forward. The "n"-shaped structure can match the manual locking assembly, which is convenient for the arrangement and installation of the manual locking assembly. The front, left and right sides of the extended seat basin 3 are provided with supporting flanges 302 that bend upward, outward and then downward. The supporting flanges 302 on the three sides are continuous. The supporting flanges 302 are flush with the upper end surface of the middle part of the extended seat basin 3. The supporting flanges 302 support the foam to prevent the foam from collapsing and affecting the riding comfort. At the same time, the strength of the extended seat basin 3 itself is also improved. A baffle 301 extending downward is provided on the front supporting flange 302. The baffle 301 is located in front of the front seat basin 2, and a groove is provided in the middle of the baffle 301.

[0024] like Figures 1 to 6 As shown, a manual locking assembly or an electric locking assembly is provided between the front seat basin 2 and the extended seat basin 3. Both the manual locking assembly and the electric locking assembly can be fixedly installed by welding or threaded connection. In this embodiment, both the manual locking assembly and the electric locking assembly are installed by bolts, which are convenient to install, positioned and prepared, and easy to disassemble. The space between the front seat basin 2 and the extended seat basin 3 is limited, and the manual locking assembly and the electric locking assembly need to be replaced. Therefore, the manual locking assembly and the electric locking assembly need to have the characteristics of compact structure and easy installation and arrangement while realizing the locking function.

[0025] like Figure 1 , Figures 3 to 5As shown, the manual locking assembly is mainly composed of an unlocking handle 4, a locking claw 5, a handle bracket 6 and a locking claw bracket 7. The handle bracket 6 is an N-shaped structure, and its horizontal section is fixed on the extended seat basin 3. The unlocking handle 4 is provided with a notch 401 extending from the middle to the rear end. The middle part of the unlocking handle 4 is hinged between the two vertical sections of the handle bracket 6 through a pin shaft, and two return springs 8 for driving the unlocking handle 4 to return are installed on the pin shaft. The two return springs 8 are arranged symmetrically on the left and right and are both located in the notch 401. The front end of the unlocking handle 4 extends out from the notch in the middle of the baffle 301 to facilitate passenger operation. The rear end of the unlocking handle 4 is bent upward so that the unlocking handle 4 and the locking claw 5 have sufficient rotation space. A pressure rod 402 for driving the locking claw 5 is provided between the groove walls on both sides of the rear end of the notch 401.

[0026] Furthermore, the locking claw bracket 7 is in the shape of an elongated strip, and the front end of the locking claw bracket 7 extends from the bottom of the pressure rod 402 to the inside of the notch 401, and the rear end is bent upward and then bent forward to form a mounting portion 701, and the mounting portion 701 is fixed on the extended seat basin 3. A locking claw hole 703 and two locking claw mounting ears 702 are provided in the middle of the locking claw bracket 7, and the two locking claw mounting ears 702 are symmetrically arranged on the left and right, and the locking claw hole 703 is located behind the locking claw mounting ears 702. The locking claw 5 is a curved surface structure with upturned front and rear ends, so that the locking claw 5 and the locking claw bracket 7 can be more smoothly contacted. The rear end of the locking claw 5 is provided with a claw extending downward, and the claw is a bilaterally symmetrical "n"-shaped structure. Two hinged ears 502 corresponding to the locking claw mounting ears 702 are provided in the middle of the locking claw 5. A spring clearance hole 501 is provided between the two hinged ears 502 on the locking claw 5. The hinged ears 502 are hinged to the locking claw mounting ears 702 through another pin shaft. The two hinged ears 502 on the pin shaft are connected to the locking claw mounting ears 702. 02 is provided with another return spring 8, which is used to drive the locking claw 5 to return. The front end of the locking claw 5 is located below the pressure rod 402, and the claw at the rear end of the locking claw 5 passes downward through the locking claw hole 703 and cooperates with the corresponding locking hole 201 to achieve the locking of the extended seat basin 3. The claw adopts an "n"-shaped structure, so that the claw and the locking hole 201 are double-secured, and the positioning is accurate, stable and reliable. At the same time, it avoids the locking hole 201 being too large, which affects the partition between adjacent locking holes 201 and the strength of the front seat basin 2.

[0027] Furthermore, when the unlocking handle 4 is lifted to make its front end rotate upward, the rear end of the unlocking handle 4 rotates downward and drives the front end of the locking claw 5 to rotate downward, so that the rear end of the locking claw 5 withdraws from the locking hole 201 to achieve unlocking. When the extended seat basin 3 slides into place, the unlocking handle 4 is released, and the unlocking handle 4 and the locking claw 5 return to their original positions in turn driven by their respective return springs 8, and the claw of the locking claw 5 is inserted into the locking hole 201 again to achieve locking.

[0028] like Figure 2 and Figure 6As shown, the electric locking assembly is an electric screw nut mechanism 10, the motor 10b and the end of the screw 10c away from the motor 10b are respectively fixedly mounted on the front seat basin 2 through brackets, the driving nut 10a threadedly matched with the screw 10c is fixedly connected to the extended seat basin 3, the motor 10b drives the driving nut 10a, thereby driving the extended seat basin 3 to slide back and forth, the structure is simple and reliable, and the movement is precise.

[0029] The present invention is cleverly designed, and while satisfying the comfort of the seat, it achieves the commonality and interchangeability of the electric and manual extension leg rests, which not only meets the needs of market differentiation, but also greatly reduces the development and production costs.

Claims

1. A manual and electric integrated leg rest extension mechanism, comprising a seat frame (1) and a front seat pan (2) mounted on the seat frame (1), wherein an extension seat pan (3) capable of sliding forward and backward is arranged on the front seat pan (2), characterized in that: A manual locking assembly or an electric locking assembly is provided between the front seat basin (2) and the extended seat basin (3), and the manual locking assembly and the electric locking assembly are interchangeable; The front seat basin (2) is high on the left and right sides and low in the middle, and has mounting flanges (202) formed on the left and right sides for fixing to the seat frame (1); The extended seat basin (3) is installed in the middle of the front seat basin (2) via a slide block assembly (11); the middle of the extended seat basin (3) protrudes upward, so that a locking assembly installation space is formed between the front seat basin (2) and the extended seat basin (3), which is used for replacing the manual locking assembly and the electric locking assembly; The front side and both left and right sides of the extended seat basin (3) are provided with upwardly protruding support flanges (302), and the support flanges (302) are flush with the upper end surface of the middle part of the extended seat basin (3); The manual locking assembly comprises an unlocking handle (4) and a locking claw (5), wherein the middle portion of the unlocking handle (4) is rotatably mounted on a handle bracket (6), the front end of the unlocking handle (4) extends outside the extended seat basin (3), the middle portion of the locking claw (5) is rotatably mounted on a locking claw bracket (7), the front end of the locking claw (5) is located below the rear end of the unlocking handle (4), the handle bracket (6) and the locking claw bracket (7) are both fixed to the extended seat basin (3), locking holes (201) evenly distributed front and rear are provided on the front seat basin (2), the rear end of the locking claw (5) cooperates with the locking hole (201), when the unlocking handle (4) is lifted to rotate, the rear end of the unlocking handle (4) rotates downward, and drives the front end of the locking claw (5) to rotate downward, so that the rear end of the locking claw (5) withdraws from the locking hole (201), thereby achieving unlocking, and the locking claw (5) and the unlocking handle (4) can both return under the drive of their respective return springs (8); The handle bracket (6) is an N-shaped structure, the horizontal section of which is fixed on the extended seat basin (3), the unlocking handle (4) is installed between two vertical sections of the handle bracket (6) via a pin shaft, the unlocking handle (4) is provided with a notch (401) extending from the middle to the rear end, the rear end of the unlocking handle (4) is bent upward, and a pressure rod (402) for driving the locking claw (5) is provided between the two side groove walls of the notch (401); The front end of the locking claw bracket (7) extends into the notch (401), and the rear end is bent upward and then bent forward to form a mounting portion (701) for fixing on the extended seat basin (3). A locking claw mounting ear (702) and a locking claw hole (703) are provided in the middle of the locking claw bracket (7). The locking claw hole (703) is located behind the locking claw mounting ear (702). The locking claw (5) is mounted on the locking claw mounting ear (702) via a pin shaft. The front end of the locking claw (5) is located below the pressure rod (402), and the rear end claw passes downward through the locking claw hole (703). The electric locking assembly is an electric screw nut mechanism (10), the electric screw nut mechanism (10) is fixedly mounted on the front seat pan (2), and the extended seat pan (3) is fixedly connected to a driving nut (10a) of the electric screw nut mechanism (10), so that the extended seat pan (3) can slide forward and backward under the drive of a transmission motor (10b).

2. The manual and electric integrated leg support extension mechanism according to claim 1, characterized in that: The front end of the extended seat basin (3) is provided with a baffle (301) extending downwards, the baffle (301) is located in front of the front seat basin (2), and the middle of the baffle (301) is provided with a notch for the unlocking handle (4) to pass through.

3. The manual and electric integrated leg support extension mechanism according to claim 1, characterized in that: The manual locking assembly and the electric locking assembly are both detachably mounted by bolts.

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