Cushion frame for vehicle seat
The vehicle seat cushion frame design addresses rigidity issues by integrating multiple frames and a reinforced bracket, enhancing structural integrity and reducing failure risks under large forces.
Patent Information
- Application Number
- CN202410832022.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-28
- Filing Date
- 2024-06-26
- Publication Date
- 2024-12-31
AI Technical Summary
Existing vehicle seat designs, such as those described in Patent Document 1, lack sufficient rigidity in the hinge and bracket connections, leading to potential failure under large forward forces.
A vehicle seat cushion frame design incorporating multiple interconnected frames and a bracket body fixed to specific frames, including a bridging frame and second frame, enhances rigidity by integrating an arched portion and reinforcement, improving the structural integrity of the hinge and bracket connection.
The enhanced frame configuration significantly increases the rigidity of the hinge and bracket connection, reducing the risk of failure under large forces and improving the welding workability.
Smart Images
Figure CN119218073A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a cushion frame for a vehicle seat in which a front end side of a seat cushion is coupled to a vehicle via a hinge. Background Art
[0002] For example, Japanese Patent Application Laid-Open No. 2009-51233 (hereinafter referred to as Patent Document 1) discloses a so-called "vehicle seat with a flip function" in which the front end of the seat cushion is connected to the vehicle via a hinge. The "flip function" means that when the seat back is folded forward, the seat cushion rotates with the front end as the center and bounces forward (see Patent Document 1). Figure 1 ). Summary of the invention
[0003] When a large force acts forward on the vehicle seat, a large load is generated on the hinge and the bracket to which the hinge is fixed. In contrast, in the invention described in Patent Document 1, the bracket is only fixed to the front side pipe portion of the seat cushion frame (see Patent Document 1). Figure 2 ).
[0004] In view of the above-mentioned problems, the present disclosure discloses an example of a vehicle seat cushion frame which can improve the rigidity of a portion including a hinge and a bracket to which the hinge is fixed, compared with the configuration described in Patent Document 1.
[0005] A vehicle seat cushion frame in which a front end side of a seat cushion is connected to a vehicle via a hinge preferably includes, for example, at least one of the following components.
[0006] That is, the constituent elements are: a first frame, which is arranged at one end side in the seat width direction and extends in the seat front-to-back direction; a second frame, which is arranged at the other end side in the seat width direction and extends in the seat front-to-back direction; a front frame, which extends in the seat width direction and connects the front end side of the first frame and the front end side of the second frame to each other; an intermediate frame, which extends in the seat width direction and connects the first frame and the second frame to each other, and is arranged at a position closer to the rear side than the front frame; a bridging frame, which extends in the seat front-to-back direction in a manner of bridging the front frame and the intermediate frame, and the bridging frame connects the front frame and the intermediate frame to each other; and a bracket body, which is used to fix the hinge to the bracket body, and the bracket body is fixed to at least the bridging frame and the second frame.
[0007] Thus, in the seat cushion frame for a vehicle seat (hereinafter referred to as "seat cushion frame"), a frame-shaped frame is formed by the front frame, the middle frame, the bridge frame, and the second frame, and the bracket body is configured to be fixed to at least the bridge frame and the second frame. Therefore, compared with the configuration described in Patent Document 1, the rigidity of the parts including the hinge and the bracket body can be improved.
[0008] In addition, the seat cushion frame may have the following configuration, for example.
[0009] That is, the cushion frame preferably has an arched portion fixed to the second frame at both the front and rear sides of the intermediate frame, and the arched portion is preferably integrated with the bracket body. Thus, in the cushion frame, the rigidity of the portion including the hinge and the bracket body can be further improved.
[0010] When any one of the front frame and the middle frame is used as the first connecting frame and the other frame is used as the second connecting frame, one end side of the bridge frame in the extension direction is preferably welded to the first connecting frame in a state of clamping the first connecting frame from the vertical direction, and the other end side of the bridge frame in the extension direction is preferably welded to the second connecting frame on one side of the second connecting frame in the vertical direction. Thus, in the seat cushion frame, the degree of freedom of welding work can be improved.
[0011] Preferably, the intermediate frame penetrates the second frame and extends in the seat width direction, and preferably the cushion frame has a third frame and a reinforcement portion, wherein the end portion of the intermediate frame in the extension direction is fixed to the third frame, and the third frame extends from the end portion toward the rear of the seat; the reinforcement portion is welded to a portion of the intermediate frame located between the second frame and the third frame, and is integrated with the bracket body.
[0012] Thus, in the seat cushion frame, the rigidity of the portion located between the second frame and the third frame in the intermediate frame can be increased.
[0013] Furthermore, in the above-mentioned seat cushion frame, it is preferable that the bracket body, the arched portion, and the reinforcing portion are an integral component formed of a single steel plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a figure which shows the seat cushion frame of 1st Embodiment.
[0015] Figure 2 It is a figure which shows the seat cushion frame of 1st Embodiment.
[0016] Figure 3 It is a figure which shows the seat cushion frame of 1st Embodiment.
[0017] Figure 4It is a diagram showing the second hinge bracket according to the first embodiment. DETAILED DESCRIPTION
[0018] Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings.
[0019] The embodiment described below is an example of an embodiment to show the technical scope of the present disclosure. That is, the technical solutions and the like described in the claims are not limited to the specific structures or configurations shown in the following embodiment.
[0020] This embodiment is an example of applying the vehicle seat cushion frame (hereinafter referred to as "seat cushion frame") of the present disclosure to a seat (hereinafter referred to as "vehicle seat") installed in a vehicle such as a vehicle. Arrows and oblique lines indicating directions in the drawings are elements of the drawings for easy understanding of the relationship between the drawings and the shapes of components or parts.
[0021] Therefore, the seat cushion frame is not limited to the directions indicated in the drawings. The directions shown in the drawings are directions when the vehicle seat of the present embodiment is assembled in a vehicle. The drawings marked with oblique lines do not necessarily represent cross-sectional views.
[0022] For a component or part that is at least marked with a symbol for explanation, at least one of them is provided, unless it is previously stated as "only one". That is, unless it is previously stated as "only one", at least two of the components are provided. The seat cushion frame shown in the present disclosure includes constituent elements such as components or parts that are at least marked with a symbol for explanation, and at least one of the structural parts shown in the figure.
[0023] (First embodiment)
[0024] <1. Overview of the seat frame>
[0025] Figure 1 The seat cushion frame 1 shown constitutes the frame of the seat cushion. The seat cushion is a part for supporting the buttocks of the seated person. In addition, a seat back (not shown) is connected to the rear end side of the seat cushion frame 1.
[0026] The seat cushion frame 1 includes at least a first frame 2 , a second frame 3 , a third frame 4 , a front frame 5 , an intermediate frame 6 , a bridge frame 7 , a first hinge bracket 10 , a second hinge bracket 8 , and the like.
[0027] The first frame 2 to the third frame 4 are strength members extending in the front-rear direction of the seat. The frames 2 to 4 are arranged in the order of the first frame 2, the second frame 3, and the third frame 4 from one end side (the right end side in this embodiment) in the width direction of the seat toward the other end side (the left end side in this embodiment) of the seat.
[0028] The front frame 5 is a strength member extending in the seat width direction and is a member that connects the front ends of the first frame 2 and the second frame 3. In the present embodiment, the front frame 5 and the first and second frames 2 and 3 are joined to each other by welding.
[0029] The middle frame 6 is a member extending in the seat width direction and connecting the first frame 2 and the second frame 3, and is disposed rearward of the front frame 5. The middle frame 6 of this embodiment penetrates the second frame 3 and extends to the other end in the seat width direction.
[0030] The front end of the third frame 4 is fixed to the end (left end in this embodiment) of the middle frame 6 in the extending direction. Therefore, the third frame 4 extends from the left end of the middle frame 6 toward the rear of the seat.
[0031] like Figure 2 As shown, the bridge frame 7 is a member extending in the seat front-rear direction in a manner bridging the front frame 5 and the middle frame 6 , and is a member connecting the front frame 5 and the middle frame 6 to each other.
[0032] like Figure 2 and Figure 3 As shown, one end side (the front end side in the present embodiment) of the bridge frame 7 in the extending direction is welded to the front frame 5 in a state of sandwiching the circular tubular front frame 5 from the top and bottom.
[0033] The other end side (the rear end side in this embodiment) of the bridge frame 7 in the extending direction is welded to the intermediate frame 6 at one side (the lower side in this embodiment) in the vertical direction of the intermediate frame 6 in the circular tube shape. Figure 2 , Figure 3 The symbol W in FIG. 1 represents a weld bead.
[0034] like Figure 1 As shown, the first hinge bracket 10 and the second hinge bracket 8 are members to which the hinges 9A and 9B are fixed, respectively. That is, the first hinge bracket 10 is a member for connecting the first frame 2 side of the seat cushion frame 1 and the hinge 9A to each other.
[0035] The second hinge bracket 8 is a member for connecting the second frame 3 side of the seat cushion frame 1 and the hinge 9B. The hinges 9A and 9B are members for connecting the front end side of the seat cushion frame 1 to the vehicle so as to be swingable relative to the vehicle.
[0036] Moreover, if Figure 2 and Figure 3As shown, the second hinge bracket 8 is fixed to at least the bridge frame 7 and the second frame 3. In addition, the second hinge bracket 8 of this embodiment is fixed to the bridge frame 7 and the second frame 3 by welding.
[0037] <2. Details of the second hinge bracket>
[0038] like Figure 4 As shown, the second hinge bracket 8 has a bracket body 81, an arched portion 82, and a reinforcing portion 83. In addition, the second hinge bracket 8 of this embodiment is an integral component, wherein the bracket body 81, the arched portion 82, and the reinforcing portion 83 are formed by stamping a steel plate.
[0039] <Stand body>
[0040] The bracket body 81 is fixed (fixed by welding in this embodiment) to the bridge frame 7 and the second frame 3 and has a fixing portion 81A. The fixing portion 81A is a portion to which the hinge 9B is fixed (fixed by bolts in this embodiment).
[0041] Welding walls 81B and 81C are provided at one end and the other end of the fixing portion 81A in the seat width direction. The welding wall 81B contacts the bridge frame 7 from one end in the seat width direction (the right end in the present embodiment) and is welded to the bridge frame 7. The welding wall 81C contacts the second frame 3 from the other end in the seat width direction (the left end in the present embodiment) and is welded to the second frame 3.
[0042] <Arch section>
[0043] like Figure 2 As shown, the arched portion 82 is a portion fixed to the second frame 3 at the front and rear sides of the intermediate frame 6. Specifically, a portion 82A of the arched portion 82 is welded to the second frame 3 at the front side of the intermediate frame 6. A portion 82B of the arched portion 82 is welded to the second frame 3 at the rear side of the intermediate frame 6. In addition, in this embodiment, as shown in FIG. Figure 4 As shown, the portion 82A is integrated with the fixing portion 81A and the welding wall 81B.
[0044] <Reinforcement Department>
[0045] like Figure 2 As shown, the reinforcing portion 83 is welded to the portion 6A located between the second frame 3 and the third frame 4 in the middle frame 6. In addition, the reinforcing portion 83 of the present embodiment contacts the portion 6A from the front side and the rear side of the portion 6A, and is welded to the portion 6A in a state of sandwiching the portion 6A from the front-rear direction of the seat.
[0046] <3. Features of the Cushion Frame of the Present Embodiment>
[0047] like Figure 2 As shown, in the seat cushion frame 1 of the present embodiment, the bracket body 81 of the fixed hinge 9B is welded and fixed to the bridge frame 7 that connects the front frame 5 and the middle frame 6 to each other and the second frame 3 .
[0048] Thus, in the seat cushion frame 1, a frame-shaped frame is formed by the front frame 5, the middle frame 6, the bridge frame 7, and the second frame 3, and the bracket body 81 is configured to be fixed to at least the bridge frame 7 and the second frame 3. Therefore, compared with the configuration described in Patent Document 1, the rigidity of the portion including the hinge 9B and the bracket body 81 can be improved.
[0049] The seat cushion frame 1 includes an arched portion 82 fixed to the second frame 3 at the front and rear sides of the intermediate frame 6, and the arched portion 82 is integrated with the bracket body 81. Thus, in the seat cushion frame 1, the rigidity of the portion including the hinge 9B and the bracket body 81 can be further improved.
[0050] The front end side of the bridge frame 7 is welded to the front frame 5 in a state of sandwiching the front frame 5 from the upper and lower directions, and the rear end side of the bridge frame 7 is welded to the middle frame 6 at the lower side of the middle frame 6. Thus, in the seat cushion frame 1, the degree of freedom of welding work can be improved.
[0051] The seat cushion frame 1 includes a reinforcement portion 83 welded to the portion 6A of the intermediate frame 6, and the reinforcement portion 83 is integrated with the bracket body 81. Thus, in the seat cushion frame 1, the rigidity of the portion between the second frame 3 and the third frame 4 in the intermediate frame 6 can be increased.
[0052] (Other Implementations)
[0053] In the above embodiment, (1) "the front end side of the bridge frame 7 is welded to the front frame 5 in a state of sandwiching the front frame 5 from the upper and lower directions, and the rear end side of the bridge frame 7 is welded to the middle frame 6 at the lower side of the middle frame 6".
[0054] However, the present disclosure is not limited thereto. Specifically, the present disclosure may have any of the following configurations (2) to (4), for example.
[0055] (2) “The rear end side of the bridge frame 7 is welded to the middle frame 6 in a state of sandwiching the middle frame 6 from the upper and lower directions, and the front end side of the bridge frame 7 is welded to the front frame 5 at the lower side of the front frame 5.”
[0056] (3) “The rear end side of the bridge frame 7 is welded to the middle frame 6 in a state of sandwiching the middle frame 6 from the upper and lower directions, and the front end side of the bridge frame 7 is welded to the front frame 5 on the upper side of the front frame 5.”
[0057] (4) “The front end side of the bridge frame 7 is welded to the front frame 5 in a state of sandwiching the front frame 5 from the upper and lower directions, and the rear end side of the bridge frame 7 is welded to the middle frame 6 on the upper side of the middle frame 6.”
[0058] The second hinge bracket 8 of the above embodiment is an integral component, wherein the bracket body 81, the arched portion 82, and the reinforcing portion 83 are formed by stamping a steel plate. However, the present disclosure is not limited thereto. That is, the present disclosure may be configured such that at least one of the arched portion 82 and the reinforcing portion 83 is eliminated.
[0059] The seat cushion frame 1 of the above-mentioned embodiment includes the third frame 4. However, the present disclosure is not limited thereto. That is, the present disclosure may be a seat cushion frame without the third frame 4, for example. In addition, in this configuration, the portion 6A is not required.
[0060] The middle frame 6 of the above embodiment is configured to penetrate the second frame 3 and extend toward the other end side in the seat width direction. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a member in which the portion 6A is a separate member from the middle frame 6 .
[0061] In the above-mentioned embodiment, the vehicle seat involved in the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the present disclosure can also be applied to seats used in vehicles such as railway vehicles, ships, and aircraft, as well as fixed seats used in theaters or homes.
[0062] Furthermore, the present disclosure is not limited to the above-mentioned embodiments as long as it complies with the disclosure of the above-mentioned embodiments. Therefore, the present disclosure may be, for example, a configuration that combines at least two of the above-mentioned multiple embodiments, or may be a configuration that abolishes any of the illustrated constituent elements or constituent elements that are described by marking symbols in the above-mentioned embodiments.
Claims
1. A seat cushion frame for a vehicle seat, the front end side of the seat cushion frame being connected to the vehicle via a hinge, the seat cushion frame for the vehicle seat being characterized by comprising: a first frame disposed at one end side in the seat width direction and extending in the seat front-rear direction; a second frame disposed at the other end side in the seat width direction and extending in the seat front-rear direction; a front frame extending in the seat width direction and connecting the front end side of the first frame and the front end side of the second frame to each other; an intermediate frame extending in the seat width direction and connecting the first frame and the second frame to each other, and the intermediate frame is arranged at a rearward side of the front frame; a bridging frame extending in the front-rear direction of the seat in a manner of bridging the front frame and the middle frame, and the bridging frame connects the front frame and the middle frame to each other; as well as The bracket body is used to fix the hinge to the bracket body, and the bracket body is fixed to at least the bridge frame and the second frame.
2. The seat cushion frame for a vehicle seat according to claim 1, characterized in that: The vehicle seat cushion frame includes an arched portion, the arched portion is fixed to the second frame, and the arched portion is fixed to the second frame at both the front side and the rear side of the intermediate frame. The arched portion is integrated with the bracket body.
3. The seat cushion frame for a vehicle seat according to claim 2, characterized in that: When any one of the front frame and the middle frame is used as the first connecting frame and the other frame is used as the second connecting frame, One end side of the bridge frame in the extending direction is welded to the first connecting frame in a state of sandwiching the first connecting frame from the top and bottom directions, and The other end side of the bridge frame in the extending direction is welded to the second connecting frame at one side of the second connecting frame in the up-down direction.
4. The seat cushion frame for a vehicle seat according to claim 3, characterized in that: The middle frame penetrates the second frame and extends along the seat width direction. The vehicle seat cushion frame comprises: a third frame to which a portion of an end portion of the intermediate frame in the extending direction is fixed, and the third frame extends from the portion toward the rear of the seat; as well as A reinforcing portion is welded to a portion of the intermediate frame located between the second frame and the third frame and is integrated with the bracket body.
5. The seat cushion frame for a vehicle seat according to claim 4, characterized in that: The bracket body, the arched portion, and the reinforcement portion are an integral component formed of a single steel plate.