Bus seat backrest framework

Abstract

The utility model provides a bus seat backrest framework which solves the problem that an existing backrest framework is poor in waist supporting effect. The bus seat backrest framework comprises a roughly inverted-U-shaped frame body, supporting rods are vertically arranged on the lower sides of the two ends of the frame body, a rectangular waist plate is vertically arranged between the two supporting rods, the left end and the right end of the waist plate are connected with the two supporting rods respectively, the waist plate is a stamped thin plate, and the height of the waist plate is basically consistent with that of the supporting rods; the middle of the front side face of the waist plate is recessed backwards to form an arc face, and the arc face extends leftwards and rightwards. And a plurality of cambered surfaces are distributed up and down at intervals. The bus seat backrest framework is good in supporting effect.

Description

Technical Field

[0001] The utility model relates to a bus seat, in particular to a bus seat backrest frame. Background Art

[0002] The bus seat back frame is an important component of the bus seat. It mainly provides support to ensure the comfort and safety of passengers during the ride.

[0003] Existing backrest frames, such as the bus seat backrest frame disclosed in the Chinese Patent Library (application number: 201820230679.7), include a backrest frame frame, which includes backrest side tubes arranged vertically opposite to each other and an upper crossbeam connected to the upper ends of the two backrest side tubes, the lower parts of the two backrest side tubes are connected with a lower crossbeam, and a waist mounting plate is connected to the middle part of the two backrest side tubes, and the two ends of the waist mounting plate are respectively connected to the two backrest side tubes; a head support seat and an "L"-shaped handle mounting seat are provided between the upper crossbeam and the backrest side tube, the head support seat is located above the upper crossbeam, and the "L"-shaped handle mounting seat is located below the upper crossbeam.

[0004] In the above-mentioned backrest frame, the waist mounting plate is overall short, which affects its supporting effect on the waist and thus affects the user experience. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a bus seat backrest frame with good back supporting effect.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a bus seat back frame, including a roughly inverted U-shaped frame, with vertically arranged support rods on the lower sides of both ends of the frame, a rectangular waist plate vertically arranged between the two support rods, and the left and right ends of the waist plate are respectively connected to the two support rods, characterized in that the type of the waist plate is a stamped thin plate, and the heights of the waist plate and the support rods are basically the same; the middle part of the front side surface of the waist plate is concave backward to form an arc surface, and the length of the arc surface extends left and right; there are multiple arc surfaces and they are distributed at intervals up and down.

[0007] The heights of the lumbar board and the support rod are basically the same, which can effectively expand the supporting area of ​​the lumbar board. At the same time, the middle part of the front side of the lumbar board is set as a backward concave arc surface, which can effectively enhance the strength of the lumbar board, so that the seat back has better forward supporting performance and greatly enhances the back support effect.

[0008] In the above-mentioned bus seat back frame, both ends of the above-mentioned lumbar plate have vertically penetrating strip grooves, the support rod is in the shape of a round rod, the cross section of the strip groove is in the shape of an arc that matches the support rod, and the inner wall of the strip groove is attached to the outer wall of the corresponding support rod. The strip groove cooperates with the support rod to play an installation guide role, which facilitates the connection between the lumbar plate and the support rod.

[0009] In the above-mentioned bus seat back frame, the support rod and the waist plate are welded and fixedly connected, which has the advantages of stable structure and convenient assembly.

[0010] In the above-mentioned bus seat back frame, the middle part of the front side of the waist plate is also concave backward to form a reinforcing groove with a circular arc cross section, the reinforcing groove extends left and right, and the reinforcing groove is provided between two adjacent arc surfaces. The addition of the reinforcing groove can further strengthen the strength of the waist plate.

[0011] In the above-mentioned bus seat back frame, both ends of the reinforcement groove extend to connect the two strip grooves respectively, so as to maximize the length of the strip groove and further enhance the strength of the waist plate.

[0012] In the above-mentioned bus seat back frame, each curved surface is penetrated front and back with a plurality of weight-reducing holes.

[0013] In the above-mentioned bus seat back frame, a plurality of weight-reducing holes 2 are passed through the bottom wall of each reinforcement groove from front to back, and the plurality of weight-reducing holes 2 on the same reinforcement groove are evenly spaced along the length direction of the reinforcement groove.

[0014] The investment in weight reduction holes one and two can reduce the weight of the waist plate and reduce material investment while ensuring the overall strength of the waist plate.

[0015] In the above-mentioned bus seat back frame, the weight-reducing hole 1 and the weight-reducing hole 2 are both strip-shaped, and the lengths of the weight-reducing hole 1 and the weight-reducing hole 2 are both extended left and right.

[0016] Compared with the prior art, the bus seat back frame has the following advantages:

[0017] 1. The heights of the lumbar plate and the support rod are basically the same, which can effectively expand the supporting area of ​​the lumbar plate. At the same time, the middle part of the front side of the lumbar plate is set as a backward concave arc surface, which can effectively enhance the strength of the lumbar plate, so that the seat back can obtain better forward supporting performance and greatly enhance the back support effect.

[0018] 2. The investment of weight-reducing hole one and weight-reducing hole two can reduce the weight of the waist plate and reduce material investment while ensuring the overall strength of the waist plate.

[0019] 3. The waist plate is a stamped thin plate, which can increase the height of the waist plate and reduce its manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of a bus seat back frame.

[0021] Figure 2 It is a three-dimensional schematic diagram of a bus seat back frame.

[0022] Figure 3 It is a three-dimensional schematic diagram of the waist plate.

[0023] In the figure, 1, frame; 1a, support rod; 2, waist plate; 2a, curved surface; 2b, reinforcement groove; 2c, strip groove; 2d, weight reduction hole 1; 2e, weight reduction hole 2. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the bus seat back frame includes a roughly inverted U-shaped frame 1, and in actual products, the frame 1 is hollow to make the entire seat back frame lightweight.

[0026] Specifically,

[0027] The lower sides of both ends of the frame 1 are vertically provided with support rods 1a, and the two support rods 1a are arranged side by side. A rectangular waist plate 2 is vertically provided between the two support rods 1a, and the length of the waist plate 2 extends left and right, and the left and right ends of the waist plate 2 are respectively connected to the two support rods 1a. Among them, the waist plate 2 is a stamped thin plate, and the waist plate 2 and the support rods 1a are basically the same height, preferably the waist plate 2 and the support rods 1a are the same height. Figures 1 to 3 As shown, the middle of the front side of the waist plate 2 is concave backward to form a curved surface 2a, and the length of the curved surface 2a extends left and right; there are multiple curved surfaces 2a and they are spaced apart up and down. In the actual product, the number of curved surfaces 2a is 3.

[0028] The heights of the lumbar plate 2 and the support rod 1a are basically the same, which can effectively expand the supporting area of ​​the lumbar plate 2. At the same time, the middle part of the front side of the lumbar plate 2 is provided with a rearward concave arc surface 2a, which can effectively enhance the strength of the lumbar plate 2, so that the seat back obtains better forward supporting performance and greatly enhances the back supporting effect.

[0029] Further, the middle part of the front side of the waist plate 2 is also concave backward to form a reinforcing groove 2b with a circular arc cross section, the reinforcing groove 2b extends left and right, and a reinforcing groove 2b is provided between two adjacent arc surfaces 2a. The addition of the reinforcing groove 2b can further strengthen the strength of the waist plate 2.

[0030] In this embodiment, if Figure 2 and Figure 3 As shown, the connection method of the waist plate 2 and the frame 1 is as follows: the support rod 1a and the waist plate 2 are welded and fixedly connected. It is further explained that the edges of both ends of the waist plate 2 are vertically penetrated by strip grooves 2c, and the length of the strip grooves 2c extends up and down. The support rod 1a is in the shape of a round rod, and the cross-section of the strip groove 2c is in the shape of a circular arc that matches the support rod 1a, and the inner wall of the strip groove 2c is attached to the outer wall of the corresponding support rod 1a. The strip groove 2c cooperates with the support rod 1a to play an installation guide role, which facilitates the connection between the waist plate 2 and the support rod 1a. It is preferred that the two ends of the reinforcing groove 2b extend to connect the two strip grooves 2c respectively to maximize the length of the strip groove 2c and further strengthen the strength of the waist plate 2.

[0031] like Figure 1 and Figure 3 As shown, each arc surface 2a is penetrated by a plurality of weight-reducing holes 2d from front to back; each reinforcing groove 2b is penetrated by a plurality of weight-reducing holes 2e from front to back, and the plurality of weight-reducing holes 2e on the same reinforcing groove 2b are evenly spaced along the length direction of the reinforcing groove 2b. The investment of weight-reducing holes 2d and 2e can reduce the weight of the waist plate 2 and the material investment under the premise of ensuring the overall strength of the waist plate 2. Preferably, the weight-reducing holes 2d and 2e are both strip-shaped, and the lengths of the weight-reducing holes 2d and 2e extend left and right.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bus seat back frame, comprising a substantially inverted U-shaped frame (1), wherein the lower sides of both ends of the frame (1) are vertically arranged support rods (1a), a rectangular waist plate (2) is vertically arranged between the two support rods (1a), and the left and right ends of the waist plate (2) are respectively connected to the two support rods (1a), characterized in that: The waist plate (2) is a stamped thin plate, and the waist plate (2) and the support rod (1a) are substantially of the same height; the middle portion of the front side surface of the waist plate (2) is concave backward to form a curved surface (2a), and the length of the curved surface (2a) extends left and right; there are a plurality of curved surfaces (2a) which are spaced apart from each other.

2. The bus seat back frame according to claim 1, characterized in that: The edges of both ends of the waist plate (2) are provided with strip grooves (2c) vertically penetrating therethrough, the support rod (1a) is in the shape of a round rod, the cross section of the strip groove (2c) is in the shape of an arc that matches the support rod (1a), and the inner wall of the strip groove (2c) is attached to the outer wall of the corresponding support rod (1a).

3. The bus seat back frame according to claim 1 or 2, characterized in that: The support rod (1a) and the waist plate (2) are fixedly connected by welding.

4. The bus seat back frame according to claim 2, characterized in that: The middle portion of the front side surface of the waist plate (2) is also concave backward to form a reinforcement groove (2b) with an arc-shaped cross section. The reinforcement groove (2b) extends left and right, and the reinforcement groove (2b) is provided between two adjacent arc surfaces (2a).

5. The bus seat back frame according to claim 4, characterized in that: Both ends of the reinforcement groove (2b) extend to connect to two shaped grooves (2c).

6. The bus seat back frame according to claim 1, characterized in that: Each curved surface (2a) is provided with a plurality of weight-reducing holes (2d) penetrating front and rear.

7. The bus seat back frame according to claim 6, characterized in that: A plurality of weight-reducing holes 2 (2e) are provided through the bottom wall of each reinforcement groove (2b) from front to back, and the plurality of weight-reducing holes 2 (2e) on the same reinforcement groove (2b) are evenly spaced along the length direction of the reinforcement groove (2b).

8. The bus seat back frame according to claim 7, characterized in that: The first weight-reducing hole (2d) and the second weight-reducing hole (2e) are both strip-shaped, and the lengths of the first weight-reducing hole (2d) and the second weight-reducing hole (2e) are both extended to the left and right.

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