JPH0671277U - Seat suspension - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a seat suspension in which a lock of a link mechanism that is performed to prevent a cushion from working can be easily released. [Structure] A link mechanism 5 and a cushion air spring 1 are provided between an upper frame 2 and a lower frame 3.
4 are installed respectively. The upper frame 2 has links 8
A lock member 17 that can be engaged and disengaged is pivotally attached to a shaft 15 of a roller 11 attached to the shaft 11, and the lock member 17 that engages with the shaft 15 and locks the link mechanism 5 is rotated by an air cylinder. Remove from

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle seat suspension.

[0002]

[Prior art]

 The seat body of an automobile is usually supported by seat suspensions of various configurations. FIG. 4 shows an example of a conventional seat suspension. The problems of the conventional seat suspension will be clarified below while explaining the configuration of the seat suspension of this example.

The seat body 1 is supported by the upper frame 2, and a seat is provided between the upper frame 2 located on the seat body 1 side and the lower frame 3 located on the floor surface 4 side. A link mechanism 5 for interposing the main body 1 in the vertical direction is provided. The link mechanism 5 has two links 7 and 8 which are pivotally attached to each other in a state of crossing each other at a part of the connecting pin 6, and in this example, the links 7 and 8 are similarly provided on the inner side of the drawing. You now have a set of links.

One end side of each link 7, 8 is fixedly fixed to the upper frame 2 and the lower frame 3 via a pivot pin 9, 10, and the other end side of each link 7, 8 is fixed. , Are rotatably mounted on the upper frame 2 and the lower frame 3 via rollers 11 and 12 which are rotatably attached to the upper frame 2 and the lower frame 3 so as to be movable in the longitudinal direction thereof. That is, the rollers 11 and 12 are supported by the upper frame 2 and the lower frame 3 so as to be rollable in the left-right direction (horizontal direction) in the drawing.

Cushion spring means 13 for elastically supporting the seat body 1 is provided between the upper frame 2 and the lower frame 3. As the spring means 13, for example, an air spring 14 as shown is used. In addition to this, it is possible to use a spring means such as a compression coil spring or other elastic member that performs the same elastic function.

According to the seat suspension described above, the vibration transmitted from the floor surface 4 to the seat body 1 when the vehicle is traveling can be softened, and the occupant seated on the seat body 1 can be given a pleasant feeling of riding. That is, the vibration of the floor surface 4 is damped by the air spring 14, and the rollers 11 and 12 roll along the upper frame 2 and the lower frame 3 while the links 7 and 8 expand and contract in a pantograph shape. Only vibrates up and down gently.

However, since this type of seat suspension has a very good vertical cushioning property, for example, when a vehicle runs on a bad road, the cushion becomes too effective and the riding comfort is rather deteriorated. There is. Therefore, conventionally, as shown in FIG. 4, a lock lever 115 is pivotally attached to a lower frame 3 via a pin 112, and when traveling on a rough road, the lock lever 115 is engaged with a pin 111 protruding from the upper frame 2. By making the upper frame 2 immovable with respect to the lower frame 3, the link mechanism 5 is locked and the seat body 1 is immovable in the vertical direction. That is, the cushioning effect of the air spring 14 is prevented from acting, and the deterioration of the riding comfort when traveling on a bad road is prevented.

However, the occupant seated on the seat gets off the vehicle while the link mechanism 5 is locked, and then tries to release the locked state by rotating the lock lever 115 counterclockwise in FIG. Then, since the upper frame 2 is urged upward by the air spring 14, the lock lever 115 is firmly engaged with the pin 111 (a biting state), and the lock lever 115 can be easily manually operated. It cannot be removed from pin 111. In such a situation, the occupant is seated on the seat again, and the weight of the occupant lowers the upper frame 2 slightly downward to weaken the engaging force between the lock lever 115 and the pin 111. The lever 115 must be released.

[0009]

[Problems to be solved by the device]

 An object of the present invention is to provide a seat suspension in which a lock of a link mechanism, which is made to prevent a cushioning action from working, can be easily released.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a link that is interposed between an upper frame located on the seat body side and a lower frame located on the floor surface side to allow the seat body to move in the vertical direction. The mechanism has two links that are pivotally attached to each other in a crossed state. One end side of each link is pivotally fixed to the upper frame and the lower frame, respectively, and the other end side of each link. Is provided between the upper frame and the lower frame via a link mechanism rotatably attached to the upper frame and the lower frame via a roller rotatably attached to the upper frame and the lower frame. A cushion spring means for elastically supporting the seat body and a shaft of the roller rotatably supported by the upper frame and rotatably supported by the frame are engaged. , The b A lock member that prohibits the movement of the lock mechanism and locks the link mechanism, and a drive unit that rotates the lock member to release the engagement between the lock member and the shaft of the roller. Propose seat suspension.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a seat suspension according to an embodiment of the present invention. Since the basic structure and operation of the seat suspension shown here are the same as those of the conventional one shown in FIG. 4, the parts having the same or similar functions are designated by the same reference numerals as those in FIG. The description is omitted. The cushion spring means 13 shown in FIG. 1 also comprises an air spring 14 provided between the upper frame 2 and the lower frame 3, but a compression coil spring or the like may be used instead of this. Further, the spring and the air spring may be used in combination, and these points are the same as the conventional one.

The difference from the prior art is that the lock lever 115 shown in FIG. 4, the pin 112 pivotally supporting the lock lever 115, and the pin 111 with which the lock lever 115 engages are not provided. As will be clearly shown in FIG. 5, the lock member 17 is rotatably pivotally attached to the upper frame 2 and the following respective elements related thereto are provided. A cavity 50 is formed in the seat body 1 as shown in FIG. 1 so as not to interfere with the operation of the lock member 17 and the elements related thereto.

As shown in FIG. 2, the lock member 17 has its base end side pivotally attached to the upper frame 2 via a pin 18, and the E-link 19 prevents the lock member 17 from being separated from the pin 18. Further, a stay pin 21 is connected to the free end side of the lock member 17 so as to be relatively rotatable, and this stay pin 21 is connected to a piston rod 22 of an air cylinder 25 as shown in FIG. The piston rod 22 is vertically movable, and this point will be described later.

On the other hand, the roller 11 provided on the other end side of the link 8 is mounted on the shaft 15 projecting from the link 8 and is rotatably supported on the upper frame 2 as in the conventional case. The shaft 15 of the roller 11 passes through a long hole 16 formed in the upper frame 2 and projects outward from the long hole 16. In this way, the shaft 15 of the roller 11 is slidably fitted to the upper frame 2 in the elongated hole 16 extending in the longitudinal direction, so that the roller 11 rolls along the upper frame 2 without any trouble. However, the function of the link mechanism 5 is not impaired.

One end and the other end of a tension spring 24 are respectively locked to the lock member 17 and the pin 23 that is externally fixed to the upper frame 2. Further, the lock member 17 is provided with a cutout recess 17a.

When the vehicle travels on a rough road, the tension spring 24 causes the lock member 17 to rotate clockwise in FIG. 1 so that the cutout recess 17a is engaged with the shaft 15 of the roller 11. The movement of the roller 11 is prohibited.

As a result, the operation of the link mechanism 5 is disabled, and the link mechanism 5 is locked. That is, the link mechanism 5 is locked so that the air spring 14 constituting the spring means 13 does not perform the cushioning action. At this time, the ridge 24 serves to maintain mutual engagement between the cutout recess 17a and the pin 11 and maintain the locked state. By locking the link mechanism 5, the vertical movement of the seat body 1 is stopped, and it is possible to prevent a reduction in riding comfort when traveling on a rough road.

Here, as shown in FIG. 3, the piston rod 22 is connected to the piston 26 in the air cylinder 25, and when the piston 26 moves up, the piston rod 22 also moves up, and accordingly, the stay pin 21. The lock member 17 is configured to rotate around the pin 18 against the action of the spring 24 in the direction in which the cutout recess 17a shown in FIG. Further, as shown in FIG. 3, air is supplied into the air cylinder 25 from an air source 27 via a solenoid valve 28 and an air tube 29.

When the above-mentioned locked state by the lock member 17 is released, an occupant seated on the seat body 1 depresses the switch 30 shown in FIG. Air is supplied to the inside of 25. Due to this supply, the piston 26 rises, the lock member 17 rotates counterclockwise toward the position shown in FIG. 1, and the notched recess 17 a thereof is disengaged from the shaft 15. As a result, the lock on the link mechanism 5 by the lock member 17 is automatically released, and the seat body 1 moves up and down as shown by an arrow a in FIG. 1 with the air spring 14 functioning again. I will get it.

As described earlier, in the conventional art, when the occupant descends from the seat body 1 while the link mechanism is locked, the lock lever 115 shown in FIG. However, in the present invention, the lock member 17 is rotated by the driving force of the air cylinder 25, and the lever 17 is rotated. Since it is disengaged from the shaft 15, the locked state can be easily released even when the occupant gets off the seat body 1. Further, it is not necessary to manually release the locking member 17, and the releasing operation can be performed smoothly.

The solenoid valve 28 is opened / closed by the on / off operation of the switch 30 shown in FIG. 3, so that air is supplied to the air cylinder 25 and interrupted. When air is supplied, the lock member 17 is held at a position separated from the pin 11, and when the air supply is interrupted, this interruption and the exhaust of the air in the air cylinder 25 cause the piston rod 22 to move. Can move freely up and down, and the lock member 17 is rotated by the action of the tension spring 24 shown in FIG.

As described above, by turning the switch 30 on and off, the link mechanism 5 can be selectively put in the locked state or the locked state can be automatically released. The operation can be made very easy.

The air cylinder 25, the air tube 29, the solenoid valve 28, and the like shown in FIG. 3 are driven to rotate the lock member 17 in order to release the engagement between the lock member 17 and the shaft 15 of the roller 11. In addition to the above, the air cylinder may be replaced with a hydraulic cylinder and a driving means for driving the piston rod 22 by a hydraulic system may be used. Alternatively, it is also possible to use a drive means that rotates the pinion with a motor to drive the rack that meshes with the pinion up and drive the lock member 17, and in this case, the rack corresponds to the piston rod 22.

As shown in FIG. 2, the roller 11 is movable in the horizontal direction together with the shaft 15, and the shaft 15 that is movable in such a direction is locked by the lock member 17. By the force, the movement of the roller 11 can be stopped and locked, and the load applied to the locking member 17 can be reduced. As a result, the thickness and size of the lock member 17 may be reduced, and the structure of the lock member 17 and its mounting and the like can be simplified and the increase in cost can be suppressed.

The present invention can also be applied to a structure in which the seat body 1 is supported not directly on the upper frame 2 but through the adjusting means for the front-back position or the vertical position. When an air spring is used as the spring means, the seat height can be adjusted at a predetermined vertical level position by adjusting the air supply / discharge to / from the air spring even when the weight of the occupant is different. It is possible to keep it constant.

[0027]

[Effect of device]

 According to the seat suspension of the present invention, the lock of the link mechanism, which is performed to prevent the cushion from working, can be easily released without manual operation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a seat suspension according to an embodiment of the present invention.

FIG. 2 is a perspective view of a lock mechanism portion of a seat suspension.

FIG. 3 is a front view of a lock release mechanism section by the same lock mechanism section.

FIG. 4 is a schematic configuration diagram showing a conventional seat suspension.

[Explanation of symbols]

 1 Seat Main Body 2 Upper Frame 3 Lower Frame 4 Floor Surface 5 Link Mechanism 7 Link 8 Link 11 Roller 12 Roller 13 Spring Means 15 Shaft 17 Lock Member

Claims (1)

[Scope of utility model registration request] 1. A link mechanism which is interposed between an upper frame located on the side of the seat body and a lower frame located on the side of the floor surface, and which enables the seat body to move in the vertical direction. Are pivoted to each other in a closed state
Book links, one end side of each link is fixedly fixed to the upper frame and the lower frame respectively, and the other end side of each link is connected to the upper and lower frames via rollers rotatably attached to the upper and lower frames. A link mechanism pivotally attached to the frame and the lower frame so as to be movable in the longitudinal direction thereof, and spring means for a cushion which is interposed between the upper frame and the lower frame and elastically supports the seat body. A lock that is pivotally attached to the upper frame and that engages with a shaft of the roller that is rotatably supported by the frame to prohibit the movement of the roller and lock the link mechanism. A seat suspension comprising a member and driving means for rotating the lock member so as to release the engagement between the lock member and the shaft of the roller.