JPH0130925Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat frame, and more particularly, to a seat frame that is suitable for use in a seat provided with a reclining device on one side and is lightweight.

[Conventional technology and problems to be solved]

Most seat frames constituting conventional seats have a rectangular shape as shown in FIG. The seat frame 100 is composed of a cushion frame 101 and a back frame 102, and the rear end of the cushion frame 101 and the back frame 10
2 and the lower end thereof. The cushion frame 101 and the back frame 102 are each formed in a rectangular shape.
This is to give strength to each frame, and is a necessary shape to give strength to the seat frame. However, the cushion frame 101 and the back frame 10 are each formed into a rectangular shape.
2, there would be two shafts in the connecting portion, which would be a very wasteful configuration.
Particularly in the case of seats for vehicles such as automobiles, one of the challenges is to reduce the weight of the entire vehicle, and it is important to reduce the number of parts and reduce the weight as much as possible. Therefore, it is desired to reduce the number of parts in the seat frame structure as well.

If the number of parts is simply reduced, the JP-A-1986 patent
A seat frame described in Japanese Patent No. 18811 is known. This is because the cushion frame and the back frame are both formed in a U-shape, and are connected through a bracket, and there is no horizontal axis at the connection point, and there is no horizontal axis at the connection point, and there is no horizontal axis at the connection point. It is only a part of a linear frame. This conventional structure was weak against twisting force and did not have sufficient strength. In particular, if a reclining device is installed on one side of the back frame (for example, the right side), the back frame can rotate freely on the other side (for example, the left side) where no reclining device is installed, so if a load is applied to the back frame, it will twist. This torsional force was concentrated at the connection point between the bracket and one lower end of the U-shaped back frame, causing damage at that point.

The present invention was devised to solve the above-mentioned conventional problems, and by sharing the parts of the seat frame of the seat, the number of parts of the seat can be reduced and the strength can be improved. The purpose is to provide a sufficient seat frame.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention consists of a cushion frame and a back frame, the back frame rotates, and the seat frame is used for a seat provided with a reclining device only on one side. The frames are both formed into a U-shape so that both ends of the back frame on the open side fit into the opening of the cushion frame, and connecting parts are provided at both ends of the cushion frame on the open side to connect both ends of the back frame on the open side. A shaft is provided between the connecting parts, and the back frame is rotatably connected at the connecting part.

[Effect]

In this invention, what spans the openings of the cushion frame and the back frame is not a part of the frame such as a wire rod, but a shaft, and due to the presence of this shaft, a reclining device is installed on one side of the seat. In this case, the torsional force applied to the other side is dispersed and is borne by the entire back frame.

〔Example〕

The present invention will be explained below with reference to preferred embodiments shown in the drawings.

FIG. 2 shows a seat frame 10 that is an embodiment of the present invention. The seat frame 10 consists of a cushion frame 11 formed in a U-shape and a back frame 12 similarly formed in a C-shape. Connecting portions 11a and 11b are provided at both ends of the U-shaped opening of the cushion frame 11, to which both ends of the opening of the back frame 12 are attached.
A shaft 12a is provided to connect both ends of the back frame 12 on the opening side. Then, when both ends of the opening of the back frame 12 are attached to the connecting parts 11a and 11b at the rear end of the cushion frame 11, a shaft disposed between both ends of the opening of the back frame 12 is attached, as shown in FIG. 12a exists between both ends of the opening of the cushion frame 11, that is, it can become a part of the frame that supports the width direction of the cushion frame 11, and not only the back frame 12 but also the cushion frame 11 has a substantially rectangular shape. Become. By attaching the back frame 12 to the cushion frame 11 in this manner, the cushion frame 11 also takes on a rectangular shape, and as a result of their connection, both frame structures have the same strength. By providing the shaft 12a to connect both sides of the open end of the back frame 12,
When a reclining device is provided on one side, the torsional force applied to the other side is dispersed, and the back frame 12
This torsional force will be borne by the entire frame, and the strength of the frame will be sufficient.

Further, the present invention has a cushion frame 11 and a back frame 1, unlike the conventional example shown in FIG.
Since the frame structure does not require a distance between the back frame 12 and the back frame 12, if the device described below is adopted as a reclining device for adjusting the rotation of the back frame 12, the side part as shown in FIG. It is possible to provide a comfortable seat without a protruding part and without sacrificing the seat width due to a reclining device. Next, the reclining device 20 most suitable for the present invention will be explained.

The reclining device 20 is provided inside the cushion frame 11 that constitutes the seat portion. Further, a back frame 12 constituting a seat backrest is rotatably attached to the cushion frame 11. The lower end side of this back frame 12 is attached to a reclining device 20, and the back frame 12 is rotated by the reclining device 20. The angle is now adjustable. As shown in detail in FIG. 5, the reclining device 20 includes a lever 1 and an upper tooth 2 disposed on the upper part of the cushion frame 11, and a lower tooth 3 and an upper tooth 2 disposed on the lower part of the cushion frame 11. , a guide member 4 disposed between the lower teeth 3, and a base plate 5. The upper part of the cushion frame 11 is provided with curved long holes 13 and windows 14 spaced apart from each other and substantially parallel to each other. A shaft 6 is slidably attached to the elongated hole 13, and a base end portion of the lever 1 is rotatably attached to the shaft 6. The tip side of the lever 1 is bent at a right angle to form a knob 15, and this knob 15 is connected to the cushion frame 11 through a window 14.
It is designed to protrude outward. Also lever 1
A guide hole 16 is formed in the middle of the guide hole 16, which is bent into a substantially dogleg shape. Furthermore, the base end of the upper tooth 2 is rotatably attached to the shaft 6 through which the base end of the lever 1 is inserted. The upper tooth 2 is attached adjacent to the lever 1, and its upper end surface is formed into a wave shape, and its lower end surface is a substantially horizontal surface with a tooth groove 21 formed in a portion thereof. Furthermore, a protruding guide pin 21 is formed in the middle portion of the surface of the upper tooth 2 opposite to the surface adjacent to the lever 1. A lower tooth 3 having a tooth groove 31 that meshes with the tooth groove 21 of the upper tooth 2 is disposed below the upper tooth 2. lower teeth 3
is a long plate-like member, a tooth groove 31 is formed in the upper end surface, a linear long hole 32 having the same length as the tooth groove 31 is formed in the lower end, and a back frame is formed in the base end. The lower end of 12 is rotatably attached,
The tip portion is bent toward the side opposite to the cushion frame 11. A shaft 7 and a shaft 8 fixed to the cushion frame 11 at a distance from the shaft 7 are slidably inserted into the elongated hole 32 of the lower teeth 3. By engaging the shafts 7 and 8 with the elongated hole 32, the lower tooth 3 is supported in a predetermined position. Further, the lower end of the guide member 4 is rotatably attached to the shaft 8. A pin 41 extending toward the cushion frame 11 is fixed to the upper end of the guide member 4, and this pin 41 contacts the upper end of the upper tooth 2 and is slidably inserted into the guide hole 16 of the lever 1. It's summery. Further, the intermediate portion of the guide member 4 has an extending portion 42.
The guide pin 22 of the upper tooth 2 is configured to come into contact with the upper surface of the extending portion 42. The lower end of the base plate 5 is rotatably fixed to the shaft 8 inserted through the guide member 4 and the shaft 7. The base plate 5 is arranged so as to cover the sides of the lower teeth 3 and the upper teeth 2, and a shaft 6 inserted through the base ends of the lever 1 and the upper teeth 2 is rotatably attached to one side of the upper end. In this way, the reclining device 20 has a lever 1 and an upper tooth 2 arranged at the upper part of the cushion frame 11, a lower tooth 3 arranged at the lower part, and a guide member 4 and a base plate 5 so as to cover the sides of these members. It is arranged. Although not shown, one end of a return spring is attached to the tip of the lower teeth 3, and the other end is attached to the cushion frame 11, so that the lower teeth 2 are always pulled rearward.

Next, the operation of the reclining device 20 configured as described above will be explained with reference to FIG. 6 and subsequent drawings. First, the state shown in FIG. 6 is a state in which the tooth grooves 21 of the upper teeth 2 and the tooth grooves 31 of the lower teeth 3 are engaged, the lower teeth 3 are held in a predetermined position, and the back frame 12 is not fixed. ing. To rotate the back frame 12 from the state shown in FIG. 6, for example, to rotate it backwards, the following operation may be performed. First, cushion frame 11
The lever 1 is rotated upward by operating the knob 15 that extends further outward. As shown in Figure 7,
When the lever 1 is rotated upward, the pin 41 of the guide member 4 inserted into the guide hole 11 of the lever 1 is
As the lever 1 rotates, the guide member 4 is guided by the guide hole 16 and rotates counterclockwise around its lower end. When the guide member 4 rotates counterclockwise, its extending portion 42 moves upward, and is pushed by this extending portion 42 to guide the guide pin 22 of the upper tooth 2.
will also be moved. Also, the pin 41 of the guide member 4 that was in contact with the upper end of the upper tooth 2 at this time
As the guide member 4 rotates, the contact with the upper tooth 2 is released, and the upper tooth 2 becomes able to rotate upward. Therefore, the guide pin 2 is
When 2 is moved upward, the upper tooth 2 is also rotated upward. By rotating the upper teeth 2 upward, the engagement between the grooves 21 of the upper teeth 2 and the tooth grooves 31 of the lower teeth 3 is released. When these two are disengaged, the lower tooth 3 becomes movable, and the back frame 12 attached to the lower tooth 3 also becomes rotatable. In addition, a return spring is attached to the tip of the lower tooth 3 between it and the cushion frame 11, and it constantly pulls the lower tooth 3, so when the lower tooth 3 becomes movable, it tries to move the lower tooth 3 backward. do. That is, when the lower tooth 3 becomes movable, the back frame 12 is set to rotate forward by the action of the return spring. Therefore, in order to rotate the back frame 12 rearward, it is sufficient to push and rotate the backrest rearward with the seater's back or hand. If the back frame 12 is rotated here, the lower teeth 3 will also move accordingly, but the back frame 1
2 is rotatably attached to the cushion frame 11, and the lower end of the back frame 12 to which the lower teeth 3 are attached moves both horizontally and vertically, so that the lower teeth 3 can also move horizontally and vertically. It moves in both vertical directions. As described above, since the moving direction of the lower teeth 3 is not constant, when the inclination angle of the back frame 12 is changed, the inclination of the lower teeth 3 also changes compared to the initial state. Further, shafts 7 and 8 to which the base plate 5 is attached are inserted into the elongated holes 32 of the lower teeth 3, and as the lower teeth 3 moves with inclination, the shaft 7 rotates around the shaft 8, so that the base plate 5 also rotates. Along with the tilting movement of the lower tooth 3, it rotates around the shaft 8. The base ends of the upper tooth 2 and lever 1 are attached to the base plate 5 via a shaft 6, and since the shaft 6 moves within the elongated hole 13 of the cushion frame 11, these upper teeth 2 and lever 1 are also attached to the base plate 5. It moves along with the movement of the lower tooth 3 via the. In other words, since the upper teeth 2 that mesh with the lower teeth 3 move with the movement of the lower teeth 3, the meshing teeth 31 of the lower teeth 3 and the meshing teeth 2 of the upper teeth 2
The two are always opposed in parallel to each other, and an optimal meshing state can be obtained. After the back frame 12 is in a predetermined position, if the lever 1 is lowered by hand or the like, the meshing teeth 21 of the upper teeth 2 and the meshing teeth 31 of the lower teeth 3 will mesh again, and the lower teeth 3 will be fixed, and the back frame will be fixed. 12
is held in place.

〔effect〕

As explained above, according to the present invention, in a seat frame used for a seat that is composed of a cushion frame and a back frame, the back frame rotates, and a reclining device is provided only on one side, the seat frame is simply U-shaped. Unlike the case where the cushion frame and the back frame are rotatably connected at each other's openings, and a wire rod for attaching an S spring is placed between the connecting parts, there is sufficient strength between the connecting parts. By providing an axle and sharing the components of the cushion frame and back frame, it is possible to provide a seat frame that has the same strength as a conventional seat and has fewer parts, making it possible to reduce the weight of the seat. . Further, by reducing the number of parts, it is possible to reduce material costs and shorten the manufacturing process, which has the effect of providing a low-cost seat. In particular, when a reclining device is installed on one side to adjust the inclination angle of the back frame, the presence of the shaft prevents torsional force from being concentrated in one point (the connecting part on the other side), and the overall strength of the frame is increased. Become something.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of a conventional seat frame, FIG. 2 is a perspective view of a seat frame showing an embodiment of the present invention, FIG. FIG. 5 is an exploded perspective view of the reclining device, and FIGS. 6 to 9 are side views illustrating the operation of the reclining device. 10...Seat frame, 11...Cushion frame, 11a, 11b...Connecting portion, 12...
Back frame, 12a... shaft, 20... reclining device.

Claims (1)

[Scope of claims for utility model registration] Cushion frame 11 and back frame 12
In the seat frame used for a seat in which the back frame 12 rotates and a reclining device is provided only on one side, the cushion frame 11 and the back frame 1
2 are both formed into a U-shape to form a cushion frame 11.
Both ends of the back frame 12 on the opening side are configured to fit into the opening of the cushion frame 11, connecting portions 11a and 11b are provided at both ends of the cushion frame 11 on the opening side, and a shaft 12a is provided to connect both ends of the back frame 12 on the opening side. A seat frame characterized in that a shaft 12a is positioned between the connecting portions 11a and 11b, and the back frame 12 is rotatably connected at the connecting portions 11a and 11b.