JPS60207613A - Elastic support - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an automobile seat cushion, a seat back,
Furthermore, it relates to an elastic support used for beds and the like.

[Prior Art] The above-mentioned elastic supports conventionally provided generally consist of a frame body and a support body installed on the frame body to support supported objects such as people and luggage. It is a constituent element.

However, since the elastic strength of the above-mentioned elastic support is approximately constant, problems may occur.

For example, in a car seat, which is a typical example of an elastic support, the elastic strength of the seat where the occupant's ischial tuberosity comes into contact can be changed depending on the occupant's weight, road conditions, length of ride, etc. Can not do it. Therefore, the ride comfort was not necessarily sufficient for some occupants. In other words, if a soft seat is used, it is good for light people, but heavy people may be concerned about bottoming out, and if a hard seat is used, it is good for people who are heavy. Although it is good for people with low body weight, there is a problem that it lacks elasticity for people who are light in weight.

[Object of the Invention] The present invention has been made in view of the above-described actual state of the prior art, and it is an object of the present invention to provide an elastic support whose elastic strength can be adjusted as necessary.

[Summary of the Invention] The elastic support of the present invention includes a frame, a support whose both ends are held by the frame and a pressing force is applied to the surface, and an intermediate portion of the support that engages the frame. and an intermediate holding member that elastically holds the intermediate portion of the support body, and the intermediate holding member is swingably held with a first engaging portion that engages with the frame as a fulcrum. 2. An arm member in which two engaging parts support the support body, a spring member that is engaged with the arm member and urges the arm member in a direction in which the arm member supports the support body, and a spring member and the spring member. The control member is interposed between the spring member and the frame body and changes the relative position of the other end of the spring member to adjust the biasing force.

Typical elastic supports of the present invention include vehicle seats and beds. For vehicle seats, the present invention can be applied to seat cushions, which bear the load on the occupant's waist, and can also be applied to seat backs and lumbar supports, which bear the load on the occupant's back.

[Structure of the Invention] FIG. 6 is a schematic diagram of the present invention, and the following description will be made according to this diagram.

In the elastic support of the present invention, the frame 300° support 4
00 can be the same as the conventional elastic support. That is, it is sufficient for the frame body 300 to have the function of holding the support body 400 described above. Therefore, when the present invention is applied to a vehicle seat, the frame 300 usually serves as a base for holding the seat. In the case of a car seat, the frame body 30 is a seat frame that slides against the floor of the car.
It may be set to 0. This frame 300 usually has a pipe structure,
Constructed of sheet metal structure.

Both ends of the support body 400 are held by the frame body 300. This support body 400 only needs to have the function of supporting objects to be supported, such as people and luggage, and has a certain surface for supporting objects to be supported. Therefore, the support body 400 may be a planar member having elasticity or, depending on the case, a plate-like member having a certain degree of rigidity. In an automobile seat, the support body 400 is usually made by forming a skeleton of a W-V-shaped spring such as an S spring bent into an S-shape, and a cushioning material such as urethane rubber is assembled onto this skeleton. It will be done. In addition, the support body 40
0 may be one in which a cloth or net is stretched over a frame forming the outer periphery, as seen in a normal chair.

The intermediate holding member 500 that characterizes the present invention has a support 4
This is a member that elastically holds the middle part of 00. The intermediate part here means the middle part of the support excluding the rear end, and is generally a part on which pressing force directly acts. Therefore,
The intermediate region usually means a region corresponding to the ischial tuberosity in the case of a seat cushion, and a region corresponding to the vicinity of the third lumbar vertebra in the case of a seat back. This intermediate holding member includes a swingable arm member, a spring member that biases the arm member,
and a control member that changes the position of the other end of the spring member.

Here, the arm member is swingable about a first engagement point where the frame and the arm member engage as a fulcrum.

The arm member may be bent in a crank shape.

The arm member includes a first arm having at least two first engaging parts having substantially the same axis and at least one second engaging part having a different axis; a second arm having a third engaging part that engages with a spring member at a position swung at a certain angle with respect to the second engaging part, the first arm and the second arm having a third engaging part; The arm may be made by bending a single spring steel strip.

The spring member described above is generally a tension coil spring to pull the arm member, but as a special example, a compression coil spring may be used to press the arm member. In short, it is sufficient for the spring member to have the function of urging the arm member in the direction in which the arm member supports the support body.

The above-mentioned control member may be any member that moves the other end of the spring member to change its position.

By changing the position of the other end of the spring member in this way, the direction in which the spring member points changes, so even if the spring force of the spring member remains constant, the biasing force applied to the arm member can be adjusted. can.

The control member may be swingably or slidably held on the frame, and may be configured to change the relative position of the portion that engages with the other end of the spring member by moving relative to the frame.

Preferably, the control member is configured to be able to quickly change the other end of the spring member to an arbitrary position and to maintain the other end at the arbitrary position.

For example, the control member may be a member in which one end of an elongated rod or plate is rotatably supported, and the other end is swingable. In this case, it is preferable to provide a locking mechanism for holding the above-mentioned rod or plate at an arbitrary swinging position. A conventional locking mechanism can be used. For example, a cavity structure can be used. In some cases, the control member may also include a link mechanism.

[Effects of the Invention] As explained above, in the elastic support of the present invention, the biasing force can be adjusted using the control member of the intermediate holding member without changing the position of the other end of the spring member. Since the biasing force can be adjusted as necessary in this way, the elastic strength of the intermediate portion of the elastic support can be adjusted.

Practical Aspect 3 of the Invention FIG. 1 schematically shows an embodiment of the intermediate holding member according to the present invention. The intermediate holding member that characterizes the present embodiment shown in FIG. It is composed of an arm member 8o that is swingable about the arm member 8o, a tension coil spring-like spring member 90 that is engaged with the arm member 80, and an IllIJJIO member 100 that is swingable about the fulcrum 100a.

In FIG. 1, a predetermined pressing force is applied downward to the arm member 8o in order to support the support body 400. Therefore, the biasing direction of the spring member 9o.

The direction R of the arm member 80 is bent at a predetermined angle at the engagement point between the spring member 9° and the arm member 80. Here, when the control member 100 is swung in the vertical direction about the fulcrum 100a, the other end 90a of the spring member 90 is
The position of changes by moving up and down.

Now, if the tensile force of the spring member 90 is a constant value F, and if the control member 100 is placed in the position A shown by the solid line and the urging direction of the spring member 90 is Q, the moment generated is F. FXa is the product of a. On the other hand, control member 1
When 00 is swung downward to position B and the urging direction of the spring member 9o is set to P, the generated moment is FXb, which is the product of F and b.

Here, since the relationship a>b exists as is clear from FIG. 1, the relationship FXa>FXb holds true. Therefore, the spring member 9
Even if the zero tensile force remains constant, the generated moment can be adjusted, and as a result, the urging force applied to the arm member 80 can be adjusted. Therefore, arm member 8o
The elastic strength of the intermediate portion 4008 of the support body 400 supported by the second engaging portion 80b can be adjusted.

[Configuration of Embodiment] FIGS. 2 to 5 show an embodiment in which the present invention is applied to a seat cushion for an automobile. In this example,
When an occupant sits on a seat cushion, a portion corresponding to the ischial tuberosity is held by an intermediate holding member. FIG. 2 is a perspective view showing the main parts of this example, excluding a portion of the seat cushion pad and cover. FIG. 3 is a side view showing an enlarged main part of FIG. 2. FIG. .

The frame body of this example is composed of a cushion frame 1 made of a steel plate and having a rectangular frame shape. A retainer 2 is formed on the rear side of the cushion frame 1, and a frame 3 is horizontally suspended at a position closer to the front of the cushion frame 1 in parallel with the rear side and the front side.

The supports of this example include four S
It is configured to include a spring 4 and a substantially rectangular frame-shaped holding frame 5 that integrally holds the four S springs 4 as a whole. This S
Pressure from IT such as a passenger or a pad acts on the spring 4 . Note that the S springs 4 used had equal pitches.

Here, as shown in FIG. 2, the tip of the holding frame 5 is fitted into a hole 3a formed on the upper surface of the frame 3 and held therein. Further, the other end portion 4a of the S spring 4 is fitted into and held in a cylinder 5a of the holding frame 5.

In this example, both ends of the spring 4 serving as a support body are held by the cushion frame 1. Here, one end 4 of the S spring 4
To hold b on the cushion frame 1,
In this example, the steel wire 6 is inserted into the hole 3b of the frame 3 to connect the steel wire 6 to the frame 3 and eventually to the cushion frame 1, and the one end 4b of the S spring 4 is inserted into the clip 6a of the steel wire 6. It is done by doing. On the other hand, S
In holding the other end 4a of the spring 4 to the cushion frame 1 as a frame, among the four S springs 4,
This is done by fitting and fixing the other end portions 4a of the two outer S springs 4 into the fixing portion 1a of the cushion frame 1.

The intermediate holding member that characterizes this example is composed of an arm member 8 bent into a crank shape, a spring member 9, and a control member 10. The arm member 8 of this example is composed of a second arm 8a located at both ends 1' and a first arm 8b forming the middle of the arm member 8, as shown in FIG.

As shown in FIG. 2, the first arm 8b is held in the cushion frame 1 by being fitted into a hole 28 of the retainer 2 as a first engaging portion. (Here, the holes 2a serving as the first engaging portions have the same axis, and there are two in number.) Therefore, the arm member 8 has the first engaging portion as a fulcrum. It is possible to swing in the direction of arrow E using the fulcrum as the fulcrum.

As shown in FIG. 2, the first arm 8b is fitted into the cylinder 5b as a second engaging portion, and as a result, the arm member 8 is
It supports the intermediate portion 4C of the S spring 4 as a support (
Here, as is clear from FIG. 2, the cylinder 5b serving as the second engaging part has a different axis from the hole 2a serving as the first engaging part). Therefore, when the arm member 8 rotates in the direction of arrow E and swings about the hole 2a (first engaging portion) of the retainer 2 as a fulcrum,
Accordingly, the intermediate portion 4C of the S spring 4 also swings. Therefore, the amount of depression of the S spring 4 on the intermediate portion 4C side can be adjusted by swinging the arm member 8. Here, the middle part 4C of the S spring 4
is the region corresponding to the ischial tuberosity when the occupant is seated.

The spring member 9 of this example is composed of a coiled tension spring, and as shown in FIG.
b and the other end 9C are hook-shaped. Then, by hooking the hook-shaped one end 9b to the hook-shaped third engaging part 8e of the second arm 8a (located at a position swung at a certain angle with respect to the cylinder 5b as the second engaging part), Spring member 9 is engaged with arm member 8 .

The control member 10 of this example includes a rod 11 installed on a cushion frame 1, a plate body 12 integrally attached to the rod 11, and an operating lever 13 provided at the tip of the rod 11.
The configuration includes the following. One end portion 11a of the rod 11 is supported in a hole 14 formed in a side portion of the cushion frame 1. Further, the other end portion 11b of the rod 11 is inserted through the other side portion of the cushion frame 1. That is,
As shown in FIG. 3, it is inserted into a horizontally elongated hole 15 formed on the other side so as to extend horizontally.

Therefore, the other end 11b side of the rod 11 is movable by the length L) of the horizontally elongated hole 15.

A cam hole 16 is formed in the plate 12 as shown in FIG. This cam hole 1-6 is a hole 16 in three stages, upper and lower.
a, 16b, and 16c. In addition, in Figure 3, 17
1 is a pin protruding from the cushion frame 1 to engage with the cam hole 16; 18 is a pad of the seat cushion;
9 is a seat cushion cover.

Next, a case will be described in which the control member 10 is used to change the position of the other end 9C of the spring member 9. First, in FIG. 3, when the operating lever 13 is moved forward (in the direction of arrow F shown in FIG. 3) by operating the operating lever 13 with a finger or the like, the rod 11 resists the spring member 9. Slide forward along the horizontally elongated hole 15.

By this slide, the holes 16a and 1 of the cam hole 16 are
The engagement between either 6b or 16c and the bottle 17 is released. In this state, the r1 operating lever 13 is rotated in the direction of the arrow 1'' in the state in which the engagement between the cam holes 16a, 16b, and 16c and the bottle 17 is released. Then, the plate 12
The end portion 12a rotates around the hero rod 11 in the direction of arrow G shown in FIG. When the end 12a of the plate 12 rotates in the direction of arrow G in this way, the other end 9 of the spring member 9
The position of G moves up and down.

As described above, when the position of the other end 9C of the spring member 9 changes by moving up and down, the biasing direction of the spring member 9 changes as explained in the actual IMR shown in FIG. The biasing force applied to the arm member 8 can be adjusted while the spring force of the member 9 remains constant. Therefore, S spring 4
The elastic strength of the intermediate portion 4c (a portion corresponding to the ischial tuberosity of the occupant) can be adjusted.

Incidentally, once the position of the other end 9G of the spring member 9 has been changed to the desired position, the rotational operation of the operating lever 13 may be stopped.

Then, the plate body 12 of the control member 10 is automatically drawn toward the spring member 9 by the spring force of the spring member 9, so that a predetermined hole among the holes 16a, 16b, and 16c of the cam hole 16 Multiply with. Therefore, the other end 9C of the spring member 9 can be fixed at the desired position, and therefore the elastic strength of the intermediate portion 4C of the S spring 4 can be maintained at a desired value.

In FIG. 4, the bottle 17 is inserted into the cam holes 16a and 16b.

16c is a graph showing the relationship between the load of the pressing force applied to the S spring 4 as a support and the amount of deflection of the S spring 4.

When the bottle 17 is engaged with the cam hole 16a, the above-mentioned moment amount is the largest, as is clear from the embodiment shown in FIG. Therefore, when the load W acts on the S spring 4, the amount of deflection of the S spring 4 is Ll. When the pin 17 and the cam hole 16b are engaged, the amount of deflection of the S spring 4 is Ll (Ll<12>), and the amount of deflection of the S spring 4 is Ll (Ll<12>)
c, the amount of deflection of the S spring 4 is 13 (Ll
<12<13).

[Effects of Example] In this example, the urging force applied to the arm member 8 can be adjusted without changing the spring force of the spring member 9 as described above. As a result, the intermediate portion 4c of the S spring 4,
In other words, you can adjust the amount of depression of the seat cushion in the area where the ischial tuberosity hits. Therefore, the condition of the road, the length of the ride,
Depending on the weight of the occupant, it is possible to adjust the amount of depression of the seat cushion in the area where the ischial tuberosity contacts and the seating height of the occupant. Therefore, one sheet can satisfy many users.

Furthermore, even if the S spring 4 etc. undergoes changes over time such as fatigue due to long-term use over several years, in this example, the urging force applied to the arm member 8 can be reduced by rotating the operating lever 13. can be adjusted, so its changes over time can be corrected.

Further, in this example, since the movement of the arm member 8 in the length direction (that is, the movement in the direction of arrow J in FIG. 2) is regulated to the required amount, it is possible to suppress the horizontal swing of the S spring 4. This arm member 8 itself functions as a stabilizer that prevents the seat from rolling.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a side view schematically showing an intermediate holding member, which is a main part. Figure 2~
Fig. 4 shows a specific embodiment in which the present invention is applied to a vehicle seat cushion, Fig. 2 is a perspective view showing the inside of the cushion frame, and Fig. 3 is an enlarged side view showing the main parts of the cushion frame. 4 is a graph showing the relationship between the load and the amount of deflection of the cushion of this example, FIG. 5 is a perspective view of an arm member, and FIG. 6 is a schematic diagram showing an example of the present invention. Inside, 1 is the cushion frame (frame body), 4 is the S spring (
6 is a steel wire, 8 and 80 are arm members (intermediate holding members), 8a is a second arm, 8b is a first arm, 9 and 90 are spring members (intermediate holding members), 10 and 100 are controls 11 is a rod, 12 is a plate, and 13 is an operating lever.

Claims (1)

[Scope of Claims] (1) A frame, a support whose both ends are held by the frame and a pressing force is applied to the surface, and an intermediate portion of the support that engages the frame; an intermediate holding member that elastically holds the intermediate portion, the intermediate holding member is swingably held around a first engaging portion that engages with the frame as a fulcrum, and a second engaging portion that engages with the frame. an arm member that supports the support;
a spring member that is engaged with the arm member and urges the arm member in a direction in which the arm member supports the support body; An elastic support comprising a control member that changes relative position and adjusts biasing force. (2. The elastic support described in claim 1 is a vehicle seat or bed. (3) The arm member has at least two first engaging portions having approximately the same axis. and at least one second engaging part having another axis, and a spring member at a position pivoted at a certain angle with the second engaging part with the first engaging part as a pivot center. and a second arm having a third engaging portion that engages with the first arm, and the first arm and the second arm are made by bending a single spring steel strip. The elastic support according to item 1. (4) The control member is swingably or slidably held by the frame, and changes the relative position of the portion that engages with the spring member by moving relative to the frame. An elastic support according to claim 1, which is comprised of: