Vehicle seats

Abstract

To obtain a vehicle seat that allows for easy connection of the ground wire to the cushion frame. [Solution] The vehicle seat 10 comprises a seat cushion 12, a cushion frame 16 having a fixing member insertion hole 26A that penetrates in the vertical direction of the seat, a sensor body 20 provided on the seat cushion 12, a ground wire 30 connected to the sensor body 20 and routed on the lower side of the cushion frame 16, and a connector bracket 22 positioned on the lower side of the cushion frame 16. With the fixing member 24 inserted into the fixing member insertion hole 26A from the upper side of the seat engaged with the connector bracket 22, the end of the ground wire 30 is sandwiched between the connector bracket 22 and the cushion frame 16, and the end of the ground wire 30 is connected to the cushion frame 16.

Description

Technical Field

[0001] The present invention relates to a vehicle seat.

Background Art

[0002] Patent Document 1 below discloses a vehicle seat provided with a heartbeat sensor. The heartbeat sensor detects an electrocardiogram signal, which is an action potential signal generated along with the pulsation of the heart of the seated person and indicates the level of consciousness, and is composed of electrode portions provided in pairs in the seat width direction. A strip-shaped conductive cloth is disposed between the pair of electrode portions in the seat width direction. The conductive cloth is a conductive cloth containing a metal material in part, is connected to the body of the vehicle body and functions as a ground, and acquires a potential that serves as a reference potential when removing an offset signal included in the signal of the electrode portion.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a configuration in which a ground wire serving as a reference potential is connected to the seat frame, it is desirable that the ground wire can be easily connected to the cushion frame.

[0005] In consideration of the above facts, an object of the present invention is to obtain a vehicle seat capable of easily connecting a ground wire to a cushion frame.

Means for Solving the Problems

[0006] A vehicle seat according to the first embodiment comprises a seat cushion that supports the buttocks of a seated occupant from below the seat, a cushion frame that constitutes the skeleton of the seat cushion and has a fixing member insertion hole formed therein that penetrates in the vertical direction of the seat, a sensor body provided on the seat cushion, a ground wire connected to the sensor body and routed on the lower side of the cushion frame below the seat, and a connector bracket positioned on the lower side of the cushion frame below the seat, wherein the fixing member inserted into the fixing member insertion hole from above the seat engages with the connector bracket, and the end of the ground wire is sandwiched between the connector bracket and the cushion frame, and the end of the ground wire is connected to the cushion frame.

[0007] In the first embodiment of the vehicle seat, a sensor body is provided in the seat cushion. A ground wire connected to the sensor body is routed along the lower side of the cushion frame. The end of this ground wire can be connected to the cushion frame, for example, by the following procedure. First, a fixing member is inserted from the top side of the seat into a fixing member insertion hole formed in the cushion frame, and the fixing member is engaged with the connector bracket. As a result, the end of the ground wire is connected to the cushion frame while being sandwiched between the connector bracket and the cushion frame. In this way, the ground wire can be easily connected to the cushion frame in the first embodiment of the vehicle seat.

[0008] In the second embodiment of the vehicle seat, the connector bracket is provided with a positioning section that locks a portion of the ground wire, thereby positioning the end of the ground wire.

[0009] In the second embodiment of the vehicle seat, the end of the ground wire can be positioned by locking a portion of the ground wire to a positioning part provided on the connector bracket. [Effects of the Invention]

[0010] The vehicle seat according to the present invention has the excellent effect of allowing the ground wire to be easily connected to the cushion frame. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic side cross-sectional view of a vehicle seat. [Figure 2] This is an exploded perspective view showing the area around the harness connection point in the seat cushion. [Modes for carrying out the invention]

[0012] A vehicle seat 10 according to an embodiment of the present invention will be described with reference to Figures 1 and 2. In the figures, arrow FR indicates the front side of the seat, arrow UP indicates the upper side of the seat, arrow RH indicates the right side in the seat width direction, and arrow LH indicates the left side in the seat width direction. Furthermore, in the following description, unless otherwise specified, when the front / rear, up / down, and left / right directions are indicated, they refer to the front / rear direction of the seat, the up / down direction of the seat, and the left / right direction in the seat width direction.

[0013] As shown in Figure 1, the vehicle seat 10 of this embodiment includes a seat cushion 12 that supports the seated occupant's buttocks from below, and a seat back 14 that supports the seated occupant's back from behind. The seat cushion 12 includes a cushion frame 16 that constitutes the frame of the seat cushion 12, a cushion pad assembly 18 attached to the cushion frame 16, and a sensor body 20 that detects whether or not a seated occupant is seated, their physique, etc. The seat cushion 12 also includes a connector bracket 22 fixed to the cushion frame 16, and a fixing member 24 that maintains the fixed state of the connector bracket 22 to the cushion frame 16.

[0014] The cushion frame 16 includes a pair of left and right side frame sections (not shown) that are spaced apart in the seat width direction and extend in the front-to-back direction. The cushion frame 16 also includes a panel frame section 26 that connects the front ends of the pair of left and right side frame sections in the left-to-right direction, and a rear frame section 28 that connects the rear ends of the pair of left and right side frame sections in the left-to-right direction. The panel frame section 26 is formed by pressing or other processes on a conductive steel plate material. Fixing member insertion holes 26A are formed in the middle of the panel frame section 26 in the left-to-right and front-to-back directions, penetrating the panel frame section 26 in the vertical direction.

[0015] The sensor body 20 is formed in a sheet shape that extends in the front-rear and left-right directions. For example, the sensor body 20 is positioned between the cushion pad and the skin material covering the cushion pad that constitute the cushion pad assembly 18. A ground wire 30 extends from the sensor body 20. This ground wire 30 is electrically connected to the sensor body 20, and most of it is routed on the lower side of the cushion frame 16. As shown in Figures 1 and 2, the ground wire 30 comprises a ground wire body 32 made of copper wire or the like, a covering portion 34 made of an insulating material that covers most of the ground wire body 32, and a ground terminal 36 fixed to the end of the ground wire body 32. The ground terminal 36 is formed using a conductive metal plate such as a copper plate. More specifically, the ground terminal 36 is composed of a disc portion 36B formed in the shape of a disc with a circular opening 36A in its center, and a crimping portion (not shown) formed integrally with the disc portion 36B. Then, the crimping portion is crimped to the end of the ground wire body 32, thereby fixing the ground terminal 36 to the end of the ground wire body 32.

[0016] The connector bracket 22 is formed in a box-like or block-like shape using a resin material. This connector bracket 22 primarily functions to support various connectors 38 and 40. More specifically, the connector bracket 22 includes a connector bracket body 22A that supports the various connectors 38 and 40. The connector bracket 22 also includes a boss portion 22B that protrudes upward from the connector bracket body 22A. Furthermore, the connector bracket 22 includes a pair of positioning portions 22C that protrude upward from the rear portion of the boss portion 22B on the connector bracket body 22A. The boss portion 22B is formed in a cylindrical shape with its axial direction being vertical. A screw hole 22D is formed in the axial center of this boss portion 22B, into which a fixing member 24, described later, is screwed (engaged). The pair of positioning portions 22C are formed in a rectangular plate shape with its thickness direction being front-to-back. These pair of positioning portions 22C are spaced apart in the front-to-back direction. At the center of the upper end of each pair of positioning portions 22C in the left-right direction, a recess 22E is formed, with the upper side open.

[0017] The fixing member 24 is, for example, a screw such as a tapping screw or a bolt. This fixing member comprises a head 24A into which a tool (not shown) engages, and a shaft portion 24B that protrudes from the head 24A and has threads formed on its outer circumference.

[0018] (Operation and effects of this embodiment) Next, the operation and effects of this embodiment will be described.

[0019] In the vehicle seat 10 of this embodiment described above, the connector bracket 22 is attached to the cushion frame 16 and the end of the ground wire 30 is connected to the cushion frame 16 by following the procedure below.

[0020] As shown in FIG. 2, first, the ground wire 30 is assembled to the connector bracket 22. At this time, by disposing a part of the ground wire main body 32 and a part of the covering portion 34 in the recess 22E of the pair of positioning portions 22C, the positioning of the portion on the ground terminal 36 side of the ground wire 30 is performed. Thereby, the state in which the ground terminal 36 is disposed along the upper surface of the boss portion 22B is maintained. In addition, by abutting the end surface on the ground terminal 36 side of the covering portion 34 against the positioning portion 22C, the positions of the opening 36A of the ground terminal 36 and the screw hole 22D of the boss portion 22B can be aligned. In the present embodiment, the shape and dimensions of the recess 22E formed in the front positioning portion 22C are set to the corresponding shape and dimensions of the ground wire main body 32. Further, the shape and dimensions of the recess 22E formed in the rear positioning portion 22C are set to the corresponding shape and dimensions of the covering portion 34.

[0021] Next, the shaft portion 24B of the fixing member 24 is inserted upward into the fixing member insertion hole 26A formed in the panel frame portion 26 and the opening 36A formed in the disk portion 36B of the ground terminal 36, and is screwed into the screw hole 22D formed in the boss portion 22B. Thereby, the ground terminal 36 constituting the terminal of the ground wire 30 is sandwiched between the boss portion 22B of the connector bracket 22 and the panel frame portion 26, and the terminal of the ground wire 30 is connected to the cushion frame 16. Thus, in the vehicle seat 10 of the present embodiment, the ground wire 30 can be easily connected to the cushion frame. In particular, in the present embodiment, the head portion 24A of the fixing member 24 can be rotated with a tool while being visually observed. Thereby, it is possible to avoid the operator performing the screwing operation of the fixing member 24 in a state where the fixing member 24 is not visible.

[0022] In addition, in the wiring path of the ground wire 30 of the present embodiment, damage due to the ground wire 30 coming into contact with the end portion of the panel frame portion 26 can be suppressed.

[0023] In addition, in the present embodiment, by providing a pair of positioning portions 22C on the connector bracket 22, it is possible to easily position the ground terminal 36 that constitutes the terminal of the ground wire 30.

[0024] In the present embodiment, an example in which a pair of positioning portions 22C are provided on the connector bracket 22 has been described. However, the present invention is not limited to this. Whether or not to provide a portion corresponding to the pair of positioning portions 22C on the connector bracket 22 may be appropriately set in consideration of workability during the assembly of the vehicle seat 10 and the like.

[0025] As described above, one embodiment of the present invention has been described. However, the present invention is not limited to the above, and it is needless to say that various modifications can be made and implemented within the scope not departing from the gist of the present invention.

Explanation of Reference Numerals

[0026] 10 Vehicle seat 12 Seat cushion 16 Cushion frame 20 Sensor body 22 Connector bracket 22C Positioning portion 30 Ground wire 26A Fixed member insertion hole

Claims

1. A seat cushion that supports the seated occupant's buttocks from below the seat, A cushion frame which constitutes the framework of the seat cushion and has fixing member insertion holes formed therein that penetrate in the vertical direction of the seat, The sensor body provided on the seat cushion, A ground wire connected to the sensor body and routed on the lower side of the cushion frame seat, A connector bracket positioned on the lower side of the cushion frame, Equipped with, A vehicle seat in which a fixing member inserted from above into the fixing member insertion hole is engaged with the connector bracket, and the end of the ground wire is sandwiched between the connector bracket and the cushion frame, and the end of the ground wire is connected to the cushion frame.

2. The vehicle seat according to claim 1, wherein the connector bracket is provided with a positioning section that locks a portion of the ground wire, thereby positioning the end of the ground wire.

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