Backrest leg structure

Abstract

The utility model relates to the field of passenger car seats, in particular to a backrest leg structure which comprises a backrest leg plate, a bottom connecting hole is formed in one end of the backrest leg plate and used for installing a guide part, and a top connecting hole is formed in the other end of the backrest leg plate and used for installing a backrest. A reinforcing groove is formed in the backrest leg plate, a rotating hole is formed in the inner wall of the bottom of the reinforcing groove, and the rotating hole is used for enabling the backrest leg plate to be rotatably matched with the seat frame. The backrest leg has the effect of ensuring the service life of the backrest leg.

Description

Technical Field

[0001] The present application relates to the field of passenger car seats, and in particular to a backrest leg structure. Background Art

[0002] A bus seat is a seat used in a bus, which generally includes a backrest and a seat frame. The backrest is rotatably coupled to the seat frame so that passengers can adjust the angle of the backrest by rotating the backrest to ensure a comfortable bus riding experience.

[0003] In the existing related technologies, the seat frame is assembled by a number of panels. For example, in the utility model patent with the announcement number CN209553002 U, a passenger car base is disclosed, including a seat frame and a backrest leg (equivalent to the backrest connecting plate 12), the backrest leg is rotatably matched with the seat frame, and the backrest leg and the seat frame are connected by a booster spring. Figure 1 One end of the backrest leg is mounted with a backrest by a bolt, and the other end of the backrest leg is mounted with a guide member, which is slidably matched with the arc groove of the seat frame to ensure the rotation stability of the backrest leg.

[0004] With respect to the above-mentioned related technologies, after long-term use, the backrest legs are easily damaged due to improper use by passengers, which affects the service life of the backrest legs. Summary of the invention

[0005] In order to ensure the service life of the backrest legs, the present application provides a backrest leg structure.

[0006] The backrest leg structure provided in this application adopts the following technical solution:

[0007] A backrest leg structure includes a backrest leg plate, one end of which is provided with a bottom connecting hole for installing a guide member, the other end of which is provided with a top connecting hole for installing a backrest, the backrest leg plate is provided with a reinforcing groove, the inner wall of the groove bottom of the reinforcing groove is provided with a rotating hole for enabling the backrest leg plate to rotate and cooperate with a seat frame.

[0008] By adopting the above technical scheme, under the premise of ensuring the material cost and processing cost of the leg board, the cross-sectional moment of inertia of the leg board is increased by strengthening the groove, thereby increasing the structural strength of the leg board, especially the bending strength, making the leg board less prone to damage, thereby ensuring the service life of the leg board.

[0009] Optionally, the inner wall corners of the reinforcement groove are chamfered.

[0010] By adopting the above technical solution, the excessive local internal force generated by the inner wall corners of the reinforced groove is reduced, thereby further ensuring the service life of the backrest leg board.

[0011] Optionally, one end of the backrest leg board is arranged in an arc shape, and the end of the backrest leg board arranged in the arc shape is arranged close to the bottom connecting hole.

[0012] By adopting the above technical solution, the arc-shaped legrest is not easy to collide or scratch with other parts of the seat during the rotation process, thereby further ensuring the service life of the legrest.

[0013] Optionally, the top connecting hole is arranged to penetrate along the thickness direction of the backrest leg board, and the top connecting hole extends along the length direction of the backrest leg board.

[0014] By adopting the above technical solution, the top connecting hole extending along the length direction of the backrest leg plate makes it easy to adjust the installation position of the backrest when assembling the backrest, thereby ensuring the applicability of the backrest leg plate.

[0015] Optionally, the backrest leg panel is provided with a rolled edge.

[0016] By adopting the above technical solution, the curling increases the cross-sectional moment of inertia of the back leg board, thereby increasing the structural strength of the back leg board, especially the bending strength, making the back leg board less prone to damage, thereby further ensuring the service life of the back leg board.

[0017] Optionally, a reinforcing plate is further included, wherein the reinforcing plate is installed on the inner wall of the groove bottom of the reinforcing groove, and the reinforcing plate is provided with a plate body through hole, and the plate body through hole is connected to the rotating hole.

[0018] By adopting the above technical solution, the reinforcing plate increases the thickness of the backrest leg structure, thereby increasing the cross-sectional moment of inertia of the backrest leg structure, thereby increasing the structural strength of the backrest leg structure, especially the bending strength, making the backrest leg structure not easily damaged, thereby ensuring the service life of the backrest leg structure.

[0019] Optionally, the reinforcing plate is provided with a plate sleeve, the material of the plate sleeve is selected to be manganese steel, the plate sleeve is penetrated by a sleeve through hole, and the plate sleeve is plugged into and matched with the rotating hole.

[0020] By adopting the above technical solution, the wear resistance of the plate sleeve is ensured, so that the inner wall of the rotating hole is not easily worn due to rotation.

[0021] Optionally, a colloid embedding groove is provided on the outer circumference of the plate sleeve, and the outer circumference of the plate sleeve is bonded to the inner wall of the rotating hole by an adhesive.

[0022] By adopting the above technical solution, the colloid embedding groove increases the contact area between the adhesive and the plate sleeve, thereby ensuring the connection strength between the plate sleeve and the reinforcing plate.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Under the premise of ensuring the material cost and processing cost of the back leg board, the cross-sectional inertia moment of the back leg board is increased by strengthening the groove, thereby increasing the structural strength of the back leg board, especially the bending strength, making the back leg board less prone to damage, thereby ensuring the service life of the back leg board.

[0025] 2. The wear resistance of the plate sleeve is ensured, so that the inner wall of the rotating hole is not easily worn due to rotation;

[0026] 3. The colloid embedding groove increases the contact area between the adhesive and the plate sleeve, thereby ensuring the connection strength between the plate sleeve and the reinforcing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the first overall schematic diagram of the overall structure of Example 1 of the present application.

[0028] Figure 2 It is the second overall schematic diagram of the overall structure of Example 1 of the present application.

[0029] Figure 3 It is the first overall schematic diagram of the overall structure of Example 2 of the present application.

[0030] Figure 4 It is an exploded schematic diagram of the backrest leg panel and the reinforcement plate of Example 2 of the present application.

[0031] Figure 5 It is an overall schematic diagram of the plate sleeve of Example 2 of the present application.

[0032] Figure 6 This is the second overall schematic diagram of the overall structure of Example 2 of the present application.

[0033] Explanation of the reference numerals: 1. backrest leg plate; 101. bottom connecting hole; 102. top connecting hole; 103. reinforcement groove; 104. rotation hole; 11. curling edge; 2. reinforcement plate; 21. plate sleeve; 211. sleeve perforation; 212. straight notch; 213. colloid embedding groove. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] Embodiment 1:

[0036] Embodiment 1 of the present application discloses a backrest leg structure. Figure 1 and Figure 2The backrest leg structure includes a backrest leg board 1, and the backrest leg board 1 is provided with two curling edges 11. The two curling edges 11 are respectively located on both sides of the backrest leg board 1, and the two backrest leg boards 1 are vertically and integrally connected to the backrest leg board 1.

[0037] Reference Figure 1 and Figure 2 , a bottom connection hole 101 is formed through one end of the backrest leg board 1, and the bottom connection hole 101 is used to install a guide member (not shown in the figure), and the bottom connection hole 101 is circular, so that the backrest leg board 1 can be stably rotated through the guide member and the arc groove (not shown in the figure) by installing the guide member. In addition, one end of the backrest leg board 1 is arc-shaped, and the arc-shaped end of the backrest leg board 1 is arranged close to the bottom connection hole 101, so as to reduce the collision or scratching of the backrest leg board 1 with other parts when the backrest leg board 1 rotates.

[0038] Reference Figure 1 and Figure 2 The other end of the backrest leg plate 1 is penetrated by two top connecting holes 102 along the thickness direction. The two top connecting holes 102 are both used to install the backrest, and the two top connecting holes 102 extend along the length direction of the backrest leg plate 1 to facilitate adjustment of the installation position of the backrest when assembling the backrest, thereby ensuring the applicability of the backrest leg plate 1.

[0039] Reference Figure 1 and Figure 2 The backrest legboard 1 is provided with a reinforcing groove 103, which is formed by pushing the surface of the backrest push plate with external force. The corners of the reinforcing groove 103 are chamfered to reduce the excessive local internal force generated by the inner wall corners of the reinforcing groove 103, thereby ensuring the service life of the backrest legboard 1. The inner wall of the groove bottom of the reinforcing groove 103 is set straight, and a rotating hole 104 is opened through the inner wall of the groove bottom of the reinforcing groove 103. The rotating hole 104 is used to make the backrest legboard 1 rotatably matched with the seat frame (not shown in the figure), and the cross-section of the rotating hole 104 is set in a circular shape. Specifically, the backrest legboard 1 can be rotatably matched with the seat frame by a cylindrical protrusion fixedly connected to the seat frame and rotatably penetrated through the rotating hole 104.

[0040] The implementation principle of a backrest leg structure in Example 1 of the present application is: by strengthening the groove 103, the cross-sectional moment of inertia of the backrest leg board 1 is increased, thereby increasing the structural strength of the backrest leg board 1, especially the bending strength, making the backrest leg board 1 not easy to be damaged, thereby ensuring the service life of the backrest leg board 1.

[0041] Embodiment 2:

[0042] Embodiment 1 of the present application discloses a backrest leg structure, which is mainly different from Embodiment 1 in that it further includes a reinforcing plate 2 and the specific arrangement of the rotating hole 104 is different.

[0043] Reference Figure 3 and Figure 4 The cross section of the rotating hole 104 is nearly circular, and the inner wall of the rotating hole 104 is provided with a straight section and an arc section, and the straight section and the arc section are connected end to end and closed. Figure 5 The material of the reinforcing plate 2 is manganese steel or other wear-resistant materials, and the shape of the reinforcing plate 2 is adapted to the bottom of the straight reinforcing groove 103, and the reinforcing plate 2 is covered on the inner wall of the bottom of the straight reinforcing groove 103. The reinforcing plate 2 is integrally connected with a plate sleeve 21, and the plate sleeve 21 is penetrated by a sleeve through hole. Figure 6 The plate sleeve 21 is plugged into the rotating hole 104, so that the reinforcing plate 2 is installed on the inner wall of the bottom of the reinforcing groove 103, and the inner wall of the rotating hole 104 is not easy to wear. The plate sleeve 21 is provided with a straight notch 212, which is adapted to the straight section of the rotating hole 104, so that the plate sleeve 21 is not easy to rotate when the backrest leg board 1 rotates.

[0044] Reference Figure 5 A colloid embedding groove 213 is provided on the outer circumference of the plate sleeve 21, and the colloid embedding groove 213 is arranged in a circular ring shape with both ends closed, so that after the plate sleeve 21 is inserted and fitted into the rotating hole 104, the outer circumference of the plate sleeve 21 is bonded and fitted to the inner wall of the rotating hole 104 by an adhesive, thereby protecting the inner wall of the rotating hole 104 by the plate sleeve 21.

[0045] The implementation principle of a backrest leg structure in Example 2 of the present application is: by arranging a reinforcement plate 2 in the reinforcement groove 103, the cross-sectional moment of inertia of the backrest leg plate 1 and the wear resistance of the rotating hole 104 are increased, thereby ensuring the service life of the backrest leg plate 1.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A backrest leg structure, characterized in that: The invention comprises a backrest leg board (1), wherein one end of the backrest leg board (1) is provided with a bottom connecting hole (101), and the bottom connecting hole (101) is used to install a guide member, and the other end of the backrest leg board (1) is provided with a top connecting hole (102), and the top connecting hole (102) is used to install a backrest, and the backrest leg board (1) is provided with a reinforcement groove (103), and the inner wall of the groove bottom of the reinforcement groove (103) is provided with a rotation hole (104), and the rotation hole (104) is used to enable the backrest leg board (1) to rotate and cooperate with the seat frame.

2. A backrest leg structure according to claim 1, characterized in that: The inner wall corners of the reinforcement groove (103) are chamfered.

3. The backrest leg structure according to claim 1, characterized in that: One end of the backrest leg board (1) is arranged in an arc shape, and the end of the backrest leg board (1) arranged in an arc shape is arranged close to the bottom connection hole (101).

4. The backrest leg structure according to claim 1, characterized in that: The top connection hole (102) is arranged to penetrate along the thickness direction of the backrest leg board (1), and the top connection hole (102) extends along the length direction of the backrest leg board (1).

5. The backrest leg structure according to claim 1, characterized in that: The backrest leg board (1) is provided with a rolled edge (11).

6. The backrest leg structure according to claim 1, characterized in that: It also comprises a reinforcing plate (2), the reinforcing plate (2) being mounted on the inner wall of the bottom of the reinforcing groove (103), the reinforcing plate (2) being provided with a plate body through hole, the plate body through hole being connected to the rotating hole (104).

7. The backrest leg structure according to claim 6, characterized in that: The reinforcing plate (2) is provided with a plate sleeve (21), the material of the plate sleeve (21) is manganese steel, a sleeve through hole is provided through the plate sleeve (21), and the plate sleeve (21) is plugged into and matched with the rotating hole (104).

8. The backrest leg structure according to claim 7, characterized in that: The outer peripheral surface of the plate sleeve (21) is provided with a colloid embedding groove (213), and the outer peripheral surface of the plate sleeve (21) is bonded to the inner wall of the rotating hole (104) by means of an adhesive.

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