JP2012096744A - Vibration reducing structure of vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the vibration reducing structure of a vehicle seat which structure reduces vibrations generated at a seat in response to a wide range of frequencies of vibrations.SOLUTION: The vibration reducing structure 1 of the vehicle seat includes a seat frame 10 having a floor-side seat frame 20 attached to a body floor F and a seat back frame 30 attached tiltably to the floor-side seat frame 20 via a reclining shaft 26, a slide member 40 disposed on the seat back frame 30, a friction-generating member 50 in slide contact with the slide member 40, and a connecting member 60 connecting the floor-side seat frame 20 to the friction-generating member 50.

Description

  The present invention relates to a vibration reduction structure that reduces vibration of a vehicle seat.

Conventionally, for example, a dynamic damper is attached to a vehicle seat in order to reduce resonance of the vehicle seat due to vibration input from a road surface during traveling.
For example, Patent Document 1 discloses a dynamic damper in which a metal damper mass is supported from above and below by an elastic member on a frame (seat back frame) of a backrest portion of a vehicle seat.
In this dynamic damper, the weight of the damper mass and the spring constant of the elastic member are tuned so as to absorb vibration corresponding to the resonance frequency of the vehicle seat.

JP 2004-116654 A

  However, the dynamic damper described in Patent Document 1 absorbs only vibrations of a specific frequency using an elastic member that matches the natural frequency of the vehicle seat, and can be applied to various vehicle seats generated in the vehicle. It was difficult to absorb a wide range of vibrations.

  The present invention has been made in view of these problems, and an object of the present invention is to provide a vibration reduction structure for a vehicle seat that can reduce vibration generated in the seat corresponding to a wide range of frequencies.

  The present invention relates to a vibration reduction structure for a vehicle seat, and includes a floor side seat frame attached to a vehicle body floor and a seat back frame attached to the floor side seat frame via a reclining shaft so as to be tiltable. A frame, a sliding member provided on the seat back frame, a friction generating member that slidably contacts the sliding member, a connecting member that connects the floor side seat frame and the friction generating member, It is characterized by providing.

  According to such a configuration, among the seat frames of the vehicle seat, the floor side seat frame attached to the vehicle body floor has higher rigidity than the seat back frame attached to the reclining shaft so as to be tiltable. By connecting the connecting member to a portion having a high value, the support rigidity of the friction generating member can be increased. Therefore, a difference in rigidity occurs between the sliding member supported by the seat back frame and the friction generating member supported by the floor side seat frame via the connecting member. Due to this rigidity difference, when vibration is input to the seat frame, a difference in amplitude occurs between the friction generating member and the sliding member, and the sliding member and the friction generating member slide to cause friction between them. Is generated, and vibration energy can be absorbed to attenuate the vibration. In addition, if the vibration is input to the seat frame, the sliding member and the friction generating member move relative to each other due to the difference in rigidity. Therefore, not only the resonance frequency of the seat frame but also the vibration of the vehicle seat can be reduced to a wide range can do.

  The connecting member includes a first connecting member and a second connecting member, and one end side of the first connecting member is connected to one side in the vehicle width direction of the floor side seat frame, and The other end side of the first connecting member is connected to the friction generating member disposed at a substantially center of the seat back frame in the vehicle width direction, and one end side of the second connecting member is connected to the vehicle of the floor side seat frame. It is connected to the other side in the width direction, and the other end side of the second connection member is connected to the friction generating member disposed at a substantially center in the vehicle width direction of the seat back frame. Is preferred.

  According to this configuration, the first connecting member and the second connecting member that support the friction generating member are installed in a state in which they are inclined in opposite directions (in other words, in an inverted V shape in front view). The rigidity of the first connecting member and the second connecting member (more specifically, the rigidity of the vehicle seat in the vehicle width direction) can be made higher than the rigidity of the seat back frame. Thus, when the seat back frame vibrates in the vehicle width direction of the vehicle seat, the first connecting member and the second connecting member move relative to the seat back frame, so that the sliding member and the friction generating member And sliding to generate friction, which can absorb vibration energy and attenuate the vibration.

  Moreover, it is preferable that the said friction generation member is arrange | positioned at the passenger | crew side seated on the said vehicle seat with respect to the said sliding member.

  According to this configuration, since the friction generating member is disposed on the occupant side seated on the vehicle seat with respect to the sliding member, the seat back frame is inclined backward in a state where the occupant can sit on the vehicle seat. By doing so, the friction generating member can be brought into contact with the sliding member using gravity. Therefore, the pressing mechanism for pressing the friction generating member against the sliding member can be reduced in size or further omitted.

  The present invention further includes a pressing mechanism that presses the friction generating member against the sliding member, and the pressing mechanism is provided between the connecting member and the floor-side seat frame. Is preferred.

  According to such a configuration, the friction generating member can be brought into contact with the sliding member with an appropriate pressing force by the pressing mechanism. Further, since the pressing mechanism is provided between the connecting member and the floor side seat frame, the pressing mechanism can be reduced in size as compared with the case where the pressing mechanism is provided between the connecting member and the seat back frame.

  The sliding member is preferably provided on the reclining shaft.

  According to such a configuration, since the sliding member is provided on the reclining shaft having a relatively higher rigidity than the seat back frame, the mounting rigidity of the sliding member is improved. Further, since the sliding member can be attached using the reclining shaft, a special member for attaching the sliding member is not necessary, and the number of parts can be reduced.

  Further, the floor side seat frame includes a seat rail portion that allows the vehicle seat to slide in the front-rear direction, and the seat rail portion includes a lower seat rail attached to the vehicle body floor, and the lower side An upper seat rail slidably installed on the upper side of the seat rail, one end side of the connecting member is connected to the upper seat rail, and the lower seat rail is fixed to the vehicle body floor It is preferable to adopt a configuration in which it is movably attached via a member.

According to this configuration, since the lower seat rail is movably attached to the vehicle body floor via the fixing member, vibrations transmitted from the vehicle body floor to the lower seat rail are released and generated in the vehicle seat. Vibration can be further reduced.
Moreover, since the one end part of the connecting member is connected to the upper seat rail, the connecting member and the friction generating member can be moved together with the slide of the vehicle seat.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration reduction structure of the vehicle seat which can reduce the vibration which generate | occur | produces in a sheet | seat corresponding to a wide frequency can be provided.

It is a perspective view of the vibration reduction structure of the vehicle seat which concerns on 1st Embodiment. It is a structural diagram of the vibration reduction structure according to the first embodiment, (a) is a front view, (b) is a left side view. It is a graph which shows the time-dependent change of the vibration acceleration of the vibration input into the seat frame, (a) shows the comparative example 1 and (b) shows Example 1, respectively. It is a graph which shows the relationship between the frequency in a seat back frame, and a response sensitivity. It is a block diagram of the vibration reduction structure which concerns on 2nd Embodiment, (a) is a front view, (b) is a left view. It is a perspective view of a seat frame provided with the vibration reduction structure concerning a 3rd embodiment. It is the II sectional view taken on the line shown in FIG. It is a disassembled perspective view of a fixing member. It is sectional drawing cut | disconnected by the II-II line | wire shown in FIG. 8 in the state which assembled the fixing member.

An embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. In addition, when showing a direction in description, it demonstrates on the basis of the front-back, left-right and up-down of a vehicle. In the description, the left-right direction is sometimes referred to as the vehicle width direction.
FIG. 1 is a perspective view of a seat frame of a vehicle seat including the vehicle seat vibration reducing structure according to the first embodiment.

The vehicle seat vibration reduction structure 1 according to the first embodiment (hereinafter sometimes simply referred to as “vibration reduction structure 1”) is applied to, for example, a rear seat of an automobile to reduce the vibration of the rear seat. Device. The application of the vibration reduction structure 1 is not limited to the rear seat, but can be applied to other vehicle seats such as a driver seat and a passenger seat.
As shown in FIG. 1, the vibration reduction structure 1 mainly includes a seat frame 10 having a floor side seat frame 20 and a seat back frame 30, a sliding member 40 provided on the seat back frame 30, and sliding. A friction generating member 50 that slidably contacts the member 40, a connecting member 60 that connects the floor side seat frame 20 and the friction generating member 50, and a pressing mechanism 70 that presses the friction generating member 50 against the sliding member 40. It is equipped with.

  The seat frame 10 is a member constituting a skeleton of a rear seat of an automobile, and is configured to be slightly wider in the left-right direction as shown in FIG. The seat frame 10 includes a floor side seat frame 20 attached to the vehicle body floor F, and a seat back frame 30 attached to the floor side seat frame 20 via a reclining shaft 26 so as to be tiltable.

The floor side seat frame 20 is a member that is disposed inside a seat cushion (not shown) of a vehicle seat and is fixed to the vehicle body floor. The floor-side seat frame 20 extends along the front-rear direction, and is a pair of left and right right side frames 21 and 22 that are spaced apart from each other in the left-right direction and are installed on the vehicle body floor F. A pair of front and rear connecting members 23 and 24 for connecting the front end portions and the rear end portions of the side frames 22 respectively, and a rear end portion of the right side frame 21 and a rear end portion of the left side frame 22 respectively. And a pair of brackets 25, 25 provided.
The right side frame 21 has a pair of legs 21a, 21a that are spaced apart from each other in the front-rear direction. The left side frame 22 has a pair of legs 22a and 22a that are spaced apart from each other in the front-rear direction.
Incidentally, the right side frame 21 and the left side frame 22 do not have a sliding function in the front-rear direction.
The “right side frame 21” and the “left side frame 22” correspond to “one side in the vehicle width direction of the floor side seat frame” and “the other side in the vehicle width direction of the floor side seat frame” in the claims. To do.

  The seat back frame 30 is a member disposed inside a seat back (not shown) of a vehicle seat, and is attached to the floor side seat frame 20 via a reclining shaft 26 so as to be tiltable. The seat back frame 30 includes a pipe member 31 formed in a square frame shape, a pair of plate members 32 and 32 attached to the left and right sides of the pipe member 31, respectively, and the pair of brackets 25 and 25 described above. And a reclining shaft 26 installed therebetween.

  The pipe member 31 includes an upper side portion 31a, a right side portion 31b and a left side portion 31c extending downward from left and right end portions of the upper side portion, and a lower side portion 31d that connects lower ends of the right side portion 31b and the left side portion 31c, It has. A headrest 33 is attached to the upper side 31 a of the pipe member 31.

  The upper end side 32a of each plate-like member 32 is attached to the right side portion 31b and the left side portion 31c of the pipe member 31, respectively. Further, the lower end side 32 b of each plate-like member 32 is formed wider than the upper end side 32 a and projects downward from the lower side portion 31 d of the pipe member 31. A through hole is formed in the lower end side 32b of the plate-like member 32, and is pivotally supported by the reclining shaft 26 so as to be tiltable. Thereby, the seat back frame 30 can be tilted back and forth with the reclining shaft 26 as a fulcrum.

  Here, comparing the rigidity of the floor side seat frame 20 and the seat back frame 30, the floor side seat frame 20 is directly attached to the vehicle body floor F, whereas the seat back frame 30 is the floor side seat frame 20. And the reclining shaft 26, the floor side seat frame 20 has higher rigidity (attachment rigidity to the vehicle body floor F) than the seat back frame 30.

  The sliding member 40 is a member that generates friction by sliding with a friction generating member 50 described later. The sliding member 40 is provided in the horizontal part between the right side part 31b and the left side part 31c of the pipe member 31, and is provided in the approximate center of the beam part 41. And a wide sliding portion 42. Although the material of the sliding member 40 is not specifically limited, For example, it can comprise by combining a metal-made or resin-made board | plate material.

The friction generating member 50 is a member that generates friction by sliding with the sliding member 40. The friction generating member 50 is formed of a thin plate member having a slightly smaller area than the sliding portion 42 of the sliding member 40. The friction generating member 50 is supported by a connecting member 60 which will be described later, and is disposed so as to contact the front surface of the sliding portion 42. In other words, the friction generating member 50 is disposed on the occupant side seated on the vehicle seat with respect to the sliding member 40. The material of the friction generating member 50 is not particularly limited, but can be constituted by a metal or resin member, for example.
Note that at least one of the front surface of the sliding portion 42 and the rear surface of the friction generating member 50 is subjected to roughening processing to an appropriate value by, for example, sandblasting, so that friction is easily generated. .

  The connecting member 60 is a member that supports the friction generating member 50 by connecting the friction generating member 50 and the floor side seat frame 20, and has higher rigidity in the left-right direction than the seat back frame 30 that supports the sliding member 40. Formed in the structure. In the first embodiment, the connecting member 60 includes a first connecting member 61 and a second connecting member 62. The 1st connection member 61 and the 2nd connection member 62 are comprised by the metal elongate rod-shaped member, for example.

The lower end side 61 a of the first connecting member 61 is connected to the rear leg portion 21 a of the right side frame 21 of the floor side seat frame 20. The upper end side 61 b of the first connecting member 61 is connected to the front surface of the friction generating member 50.
A lower end side 62 a of the second connecting member 62 is connected to the rear leg portion 22 a of the left side frame 22 of the floor side seat frame 20. An upper end side 62 b of the second connecting member 62 is connected to the front surface of the friction generating member 50.
Note that the lower end side 61a of the first connecting member 61 and the lower end side 62a of the second connecting member 62 are leg portions 21a, 22a so that the seat back frame 30 can move following the tilt when the seat back frame 30 tilts back and forth. Are connected to be tiltable in the front-rear direction.

  Here, since the friction generating member 50 is disposed at the approximate center of the seat back frame 30 in the vehicle width direction, the first connecting member 61 and the second connecting member 62 are inclined in opposite directions (in other words, If it does, it will arrange | position in reverse V shape or C shape in front view. Thereby, the support rigidity of the left-right direction of the friction generating member 50 by the 1st connection member 61 and the 2nd connection member 62 becomes high.

The pressing mechanism 70 is a device that presses the friction generating member 50 against the sliding member 40. The pressing mechanism 70 is constituted by two tension springs 71 and 72, for example.
The right tension spring 71 has one end fixed to the first connecting member 61 and the other end fixed to the rear coupling member 24. The left tension spring 72 has one end fixed to the second connecting member 62 and the other end fixed to the rear coupling member 24. Thereby, the first connecting member 61 and the second connecting member 62 are attracted to the rear side (to the sliding member 40 side), and the friction generating member 50 presses the sliding member 40.

2A and 2B are structural views of the vibration reducing structure according to the first embodiment, in which FIG. 2A is a front view and FIG. 2B is a left side view. In FIG. 2A, the state of the vibration reducing structure 1 that has moved to the left side due to vibration is schematically depicted by a two-dot chain line.
As shown in FIGS. 2A and 2B, the friction generating member 50 is attached to the floor side seat frame 20 having a higher rigidity than the seat back frame 30 via the connecting member 60. Rigidity in the left-right direction is higher than that of the sliding member 40 attached to 30. Further, since the first connecting member 61 and the second connecting member 62 that support the friction generating member 50 on the floor side seat frame 20 are arranged in an inverted V shape in front view, the rigidity in the left-right direction is further enhanced. ing.

  Therefore, as shown in FIG. 2 (a), when vibration in the left-right direction is input from the vehicle body floor F to the floor side seat frame 20, the amplitude y1 of the sliding member 40 supported by the seat back frame 30 is the first. The amplitude y2 of the friction generating member 50 supported by the first connecting member 61 and the second connecting member 62 is larger. Due to this difference in amplitude, the sliding member 40 and the friction generating member 50 move relative to each other. At this time, the friction generating member 50 is in contact with the sliding member 40 with a predetermined pressing force by the tension springs 71 and 72 of the pressing mechanism 70 as shown in FIG. And the friction generating member 50 move relative to each other (sliding), friction is generated, vibration energy is absorbed (consumed), and the vibration of the vehicle seat is attenuated.

Next, the effects of the vibration reduction structure 1 according to the first embodiment will be described with reference to FIGS.
FIG. 3 is a graph showing the change over time of the vibration acceleration of the vibration input to the seat frame, where (a) shows Comparative Example 1 and (b) shows Example 1. FIG. FIG. 4 is a graph showing the relationship between the frequency and response sensitivity in the seat back frame.

As shown in FIG. 2A, a first measurement point P1 is set on the upper side portion 30a of the seat back frame 30, and a second measurement point P2 is set on the friction generating member 50. Vibration was input to the vibration acceleration (cm / sec ² ) at the first measurement point P1 and the second measurement point P2.
In addition, the friction of the vibration reduction structure 1 was determined by replacing the tension springs 71 and 72 of the pressing mechanism 70 and repeating the experiment while gradually changing the spring force, thereby obtaining an appropriate spring force and friction.

In Comparative Example 1, although not shown, a predetermined vibration is input to the seat frame 10 in which the sliding member 40, the friction generating member 50, the connecting member 60, and the pressing mechanism 70 are not installed, and FIG. As shown in FIG. 4, the change with time of the vibration acceleration G (cm / sec ² ) at the first measurement point P1 was measured. As a result, it can be seen that the vibration acceleration G at the first measurement point P1 continues with a substantially constant amplitude and period.

  Next, in the first embodiment, as shown in FIGS. 1 and 2, the sliding member 40, the friction generating member 50, the connecting member 60, and the pressing mechanism 70 are attached to the seat back frame 30, and the tension spring 71 of the pressing mechanism 70. , 72 is adjusted to appropriately adjust the friction between the sliding portion 42 of the sliding member 40 and the friction generating member 50, and the same vibration as that of the comparative example 1 is input to input the first measurement point P1. And it measured at the 2nd measurement point P2.

  As a result, as shown in FIG. 3B, the vibration at the first measurement point P1 and the second measurement point P2 is in a state in which the amplitude (amplitude of the vibration acceleration G) is shifted for a predetermined time from the start of vibration. It was. Due to this deviation in amplitude, the sliding portion 42 of the sliding member 40 and the friction generating member 50 slide to generate friction between them, and vibrational energy is consumed (absorbed) by this frictional resistance, and gradually vibrates. The acceleration G attenuated.

  Next, as shown in FIG. 4, the response sensitivity of the seat back frame 30 when vibration was input to the seat frame 10 by hammering was measured.

As a result, the peak value of the response sensitivity of the seat back frame 30 was smaller in Example 1 in which the friction of the vibration reduction structure 1 was appropriately adjusted than in Comparative Example 1 in which the vibration reduction structure 1 was not provided.
Further, comparing Comparative Example 1 and Example 1, it can be seen that the response sensitivity of Example 1 is lower than that of Comparative Example 1 in a relatively low frequency range.

  Accordingly, the vibration of the vehicle seat other than the specific frequency can be reduced by providing the vibration reduction structure 1 on the vehicle seat and appropriately adjusting the friction (pressing force) between the sliding member 40 and the friction generating member 50. I understand.

  As described above, according to the vehicle seat vibration reducing structure 1 according to the first embodiment, the floor side seat frame 20 attached to the vehicle body floor F of the vehicle seat frame 10 is reclining. Since the rigidity is higher than that of the seat back frame 30 attached to the shaft 26 so as to be tiltable, the support rigidity of the friction generating member 50 can be increased by connecting the connecting member 60 to the portion having the high rigidity. Therefore, a rigidity difference is generated between the sliding member 40 supported by the seat back frame 30 and the friction generating member 50 supported by the floor side seat frame 20 via the connecting member 60. Due to this rigidity difference, when vibration is input to the seat frame 10, an amplitude difference is generated between the friction generating member 50 and the sliding member 40, and the sliding member 40 and the friction generating member 50 slide. Friction occurs between the two, and this frictional force can absorb vibration energy and attenuate the vibration. The sliding member 40 and the friction generating member 50 move relative to each other due to a difference in rigidity when vibration is input to the seat frame 10, so that the vehicle seat is compatible with a wide range of frequencies, not limited to the resonance frequency of the seat frame 10. Can be reduced.

  Further, according to this configuration, the first connecting member 61 and the second connecting member 62 that support the friction generating member 50 are inclined in opposite directions (in other words, in an inverted V shape in front view). Therefore, the rigidity (more specifically, the rigidity in the left-right direction) of the first connecting member 61 and the second connecting member 62 can be made higher than the rigidity of the seat back frame 30. Thus, when the seat frame 10 vibrates in the left-right direction, the friction generating member 50 supported by the first connecting member 61 and the second connecting member 62 and the sliding member 40 supported by the seat back frame 30 are arranged. Therefore, the sliding member 40 and the friction generating member 50 slide to generate friction, and the frictional force absorbs vibration energy to attenuate the vibration. be able to.

  Further, according to this configuration, the friction generating member 50 is disposed on the occupant side seated on the vehicle seat with respect to the sliding member 40, so that the seat back frame 30 is inclined rearward when the occupant is seated. By doing so, the friction generating member 50 can be brought into contact with the sliding member 40 using gravity. Therefore, the pressing mechanism 70 for pressing the friction generating member 50 against the sliding member 40 can be downsized or further omitted.

  Further, according to this configuration, the friction generating member 50 can be brought into contact with the sliding member 40 with an appropriate pressing force by changing the tension springs 71 and 72 of the pressing mechanism 70 and adjusting the spring force. . In addition, since the pressing mechanism 70 is provided between the rear side coupling member 24 and the connecting member 60 of the floor side seat frame 20, the distance between the two becomes small, so that the pressing mechanism 70 can be downsized. .

  Next, the vibration reducing structure 1A for a vehicle seat according to the second embodiment will be described in detail with reference to FIG. In addition, the same code | symbol is attached | subjected about the element same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

FIG. 5 is a structural diagram of the vibration reducing structure according to the second embodiment, wherein (a) is a front view and (b) is a left side view.
As shown in FIGS. 5A and 5B, in the vibration reducing structure 1A according to the second embodiment, the sliding portion 42A of the sliding member 40A is provided at a substantially central portion in the left-right direction of the reclining shaft 26. And the point from which the beam part 41 (refer FIG. 1) is abbreviate | omitted from 1st Embodiment.

  According to such a configuration, since the sliding portion 42A of the sliding member 40A is provided on the reclining shaft 26 having high rigidity instead of the seat back frame 30, the mounting rigidity of the sliding portion 42A is improved. Further, since the sliding portion 42A can be attached using the reclining shaft 26, the beam portion 41 (see FIG. 1) is not necessary, and the number of parts can be reduced.

  Further, as shown in FIG. 5B, the position of the reclining shaft 26 does not change even when the seat back frame 30 tilts back and forth, so that the friction generating member 50 can be easily brought into contact with the sliding portion 42A. become. Moreover, since the lower end part of the 1st connection member 61 and the 2nd connection member 62 can be fixed so that it cannot tilt, the support rigidity of the friction generating member 50 can be improved.

Next, a vibration reduction structure 1B according to the third embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the element same as 1st Embodiment, and the overlapping description is abbreviate | omitted.
FIG. 6 is a perspective view of a seat frame including a vibration reducing structure according to the third embodiment. FIG. 7 is a cross-sectional view taken along the line II shown in FIG. FIG. 8 is an exploded perspective view of the fixing member. 9 is a cross-sectional view taken along line II-II shown in FIG. 8 in a state where the fixing member is assembled.

  As shown in FIG. 6, the vibration reduction structure 1B according to the third embodiment is one in which the present invention is applied to, for example, a driver seat and a passenger seat that have a smaller width in the left-right direction than the rear seat of an automobile. The vibration reduction structure 1B mainly allows the floor-side seat frame 20B of the seat frame 10B to be slidable in the front-rear direction, and allows vibration input from the vehicle body floor F to the floor-side seat frame 20B to escape. The point which is comprised so that it can do is different from 1st Embodiment. Hereinafter, the difference from the first embodiment will be mainly described.

  As shown in FIG. 6, the vibration reduction structure 1 </ b> B according to the third embodiment includes a seat frame 10 </ b> B having a floor side seat frame 20 </ b> B and a seat back frame 30, and a sliding member 40 attached to the seat back frame 30. The friction generating member 50 that contacts the sliding member 40 and the connecting member 60 that connects the friction generating member 50 and the floor side seat frame 20B are provided.

The floor-side seat frame 20B extends along the front-rear direction, and is separated from each other in the left-right direction and is installed on the vehicle body floor F. The pair of right and left seat rail portions 80R and 80L, and the right seat rail portion A pair of front and rear coupling members 23 and 24 for coupling the front end portions and the rear end portions of 80R and the left seat rail portion 80L, respectively, and the rear end portion and the left seat rail portion 80L of the right seat rail portion 80R. A pair of brackets 25, 25 provided at the rear end portions of each of the rear ends and a reclining shaft 26 installed between the pair of brackets 25, 25 are provided.
The right seat rail portion 80R and the left seat rail portion 80L have a sliding function for sliding the vehicle seat in the front-rear direction.

The right seat rail portion 80R includes a lower seat rail 81 attached to the vehicle body floor F, an upper seat rail 82 slidably installed on the lower seat rail 81, and a frame attached to the upper seat rail 82. A main body 83.
The left seat rail portion 80L has a symmetrical structure with the right seat rail portion 80R. Similarly to the right seat rail portion 80R, the lower seat rail 81, the upper seat rail 82, the frame main body portion 83, ,have.

As shown in FIG. 7, the lower seat rail 81 is a long metal member having a groove 81a that opens upward, and is installed along the front-rear direction of the vehicle. On the upper end side of the groove portion 81a, a pair of flange portions 81b and 81b having an inverted L shape in a cross-sectional view are provided. The width dimension of the opening part 81c provided between the pair of flange parts 81b and 81b is smaller than the width dimension of the bottom part of the groove part 81a.
Attachment members 85 and 85 (see FIG. 6) for attaching the lower seat rail 81 to the vehicle body floor F are provided at the front end portion and the rear end portion of the lower seat rail 81, respectively.

  The upper seat rail 82 is a long metal member formed in an inverted T shape in a cross-sectional view, and is slidably installed in the groove 81 a of the lower seat rail 81. The upper seat rail 82 has a bottom plate portion 82a installed at the bottom of the groove portion 81a, and a wall portion 82b that rises from the center in the width direction of the bottom plate portion 82a. The wall part 82b protrudes upward from the opening part 81c. The width dimension of the bottom plate part 82a is formed larger than the width dimension of the opening part 81c. Thereby, the upper seat rail 82 becomes slidable in the front-rear direction along the groove 81a, and cannot move in the up-down direction and the left-right direction.

  The lower end side 61a of the first connecting member 61 is connected to the rear end portion of the upper seat rail 82 of the right seat rail portion 80R. The lower end side 62a of the second connecting member 62 is connected to the rear end portion of the upper seat rail 82 of the left seat rail portion 80L. The rear coupling member 24 is bridged between the rear end portion of the upper seat rail 82 of the right seat rail portion 80R and the rear end portion of the upper seat rail 82 of the left seat rail portion 80L.

  As shown in FIG. 6, the frame main body 83 is made of, for example, a metal plate-like member, and is fixed to the side surface of the wall portion 82 b of the upper seat rail 82. The rear end portion of the frame main body 83 extends obliquely upward and constitutes a bracket 25 that supports the reclining shaft 26. Further, the front coupling member 23 is bridged between the front end portion of the frame main body portion 83 of the right seat rail portion 80R and the front end portion of the frame main body portion 83 of the left seat rail portion 80L.

  Next, a mounting structure between the mounting member 85 of the lower seat rail 81 and the vehicle body floor F will be described with reference to FIGS. Here, the attachment member 85 attached to the front end portion of the lower seat rail 81 will be described as an example, and the attachment member 85 at the rear end portion of the lower seat rail 81 and the vehicle body floor F, which are formed symmetrically in the front-rear direction. Description of the mounting structure is omitted.

  The attachment member 85 further includes a flat plate portion 85a attached to the bottom surface of the lower seat rail 81 (see FIG. 6), a step portion 85b extending downward from the front end side of the flat plate portion 85a, and a lower end portion of the step portion 85b. An extending portion 85c extending forward. A through hole 85d penetrating in the vertical direction is formed in the extending portion 85c. The extension part 85c of the attachment member 85 is movably attached to the vehicle body floor F via a fixing member 90 described later.

  The fixing member 90 is a member that movably attaches the attachment member 85 (and thus the lower seat rail 81) to the vehicle body floor F by providing play (gap) with the attachment member 85. As shown in FIGS. 8 and 9, the fixing member 90 includes a soundproof rubber ring 91, a soundproof rubber bush 92, a bolt 93, and a nut 94.

  The soundproof rubber ring 91 is a circular rubber member in a plan view, and has a through hole 91a through which a bolt 93 is inserted at the center. The soundproof rubber ring 91 is disposed between the extension portion 85 c of the attachment member 85 and the vehicle body floor F.

  The soundproof rubber bushing 92 is formed through a cylindrical portion 92a formed in a cylindrical shape, an annular flange portion 92b extending radially outward from the upper end portion of the cylindrical portion 92a, and a central axis in the vertical direction. And a through hole 92c. In the soundproof rubber bush 92, the cylindrical portion 92a is disposed inside the through hole 85d of the extending portion 85c, and the flange portion 92b is disposed above the extending portion 85c.

The bolt 93 includes a head portion 93a that is formed in a hexagonal shape in plan view, a flange portion 93b that extends annularly in the direction perpendicular to the axis from the lower end side of the head portion 93a, and a lower portion that extends downward from the lower end side of the flange portion 93b. And a threaded portion 93d extending downward from the lower end side of the columnar portion 93c. The columnar part 93c is formed with a larger diameter than the threaded part 93d.
The columnar portion 93 c of the bolt 93 is disposed inside the through hole 92 c of the soundproof rubber bush 92. The lower surface of the flange portion 93 b of the bolt 93 is in contact with the upper surface of the flange portion 92 b of the soundproof rubber bush 92. The threaded portion 93d of the bolt 93 is inserted through a mounting hole Fa formed in the vehicle body floor F, and is fastened to a nut 94 (see FIG. 10) fixed by welding to the lower surface of the mounting hole Fa.

As shown in FIG. 9, the outer diameter D3 of the cylindrical portion 92a of the soundproof rubber bush 92 is smaller than the inner diameter D4 of the through hole 85d of the extending portion 85c (D3 <D4). Thereby, a gap is formed between the outer peripheral surface of the cylindrical portion 92a and the inner peripheral surface of the through hole 85d. Further, the height dimension H3 of the cylindrical portion 92a of the soundproof rubber bush 92 is larger than the thickness dimension H4 of the extending portion 85c (H3> H4). Thus, a gap is formed between the lower surface of the flange portion 92b of the soundproof rubber bush 92 and the upper surface of the extending portion 85c. Due to these gaps, the attachment member 85 is configured to be movable with respect to the fixed member 90.
These gaps are set to 1 mm or less, for example.

  On the other hand, the height dimension H1 of the columnar part 93c of the bolt 93 is formed substantially equal to the height dimension H2 of the cylindrical part 92a of the soundproof rubber bush 92. Accordingly, the soundproof rubber ring 91 is sandwiched between the columnar portion 93 c of the bolt 93 and the vehicle body floor F, and the soundproof rubber bush 92 is sandwiched between the flange portion 93 b of the bolt 93 and the soundproof rubber ring 91.

  Incidentally, in this embodiment, the diameter D1 of the columnar portion 93c of the bolt 93 is formed smaller than the inner diameter D2 of the through hole 92c of the soundproof rubber bush 92 (D1 <D2), and penetrates the outer peripheral surface of the columnar portion 93c. A gap is formed between the inner peripheral surface of the hole 92c. However, the diameter D1 of the columnar portion 93c of the bolt 93 and the inner diameter D2 of the through hole 92c of the soundproof rubber bush 92 may be made equal to eliminate the gap.

According to the vibration reducing structure 1B for a vehicle seat according to the third embodiment configured as described above, in addition to the operational effects of the vibration reducing structure 1 according to the first embodiment, the following operational effects are provided. Play.
That is, in the vibration reduction structure 1B, since the attachment member 85 of the lower seat rail 81 is attached to the vehicle body floor F via the fixing member 90, the vibration reduction structure 1B is attached to the lower seat rail 81 from the vehicle body floor F. The transmitted vibration can be released and the vibration generated in the vehicle seat can be further reduced.
Further, since the lower end sides 61a and 62a of the first connecting member 61 and the second connecting member 62 are connected to the upper seat rail 82, the connecting member 60 and the friction generating member 50 are moved together with the slide of the vehicle seat. be able to.

  As mentioned above, although embodiment of this invention was described in detail with reference to drawings, this invention is not limited to this, In the range which does not deviate from the main point of invention, it can change suitably.

  For example, in this embodiment, although the connection member 60 was comprised by the 1st connection member 61 and the 2nd connection member 62 which were arrange | positioned in reverse V shape by front view, this invention is not limited to this. For example, the connecting member 60 may be configured by a single rod-shaped member (plate-shaped member) that is wide in the left-right direction.

  In the third embodiment, the bolt 93 having the columnar portion 93c is used. However, a cylindrical collar configured by using a separate member instead of the columnar portion 93c by replacing the portion corresponding to the columnar portion 93c with the screw portion 93d. The bolt 93 may be configured by inserting the threaded portion 93d through (not shown). In this way, the size of the gap in the height direction can be adjusted by exchanging the collar.

  In the third embodiment, the present invention is applied to a driver's seat or front passenger seat of an automobile having a slide function as a vehicle seat. However, the present invention is not limited to this, for example, a three-row seat type. The present invention can also be applied to vehicle seats having a sliding function such as second and third row vehicle seats of automobiles.

DESCRIPTION OF SYMBOLS 1 Vibration reduction structure 10 Seat frame 20 Floor side seat frame 26 Reclining shaft 30 Seat back frame 31 Pipe member 32 Plate member 33 Headrest 40 Sliding member 41 Beam part 42 Sliding part 50 Friction generating member 60 Connecting member 61 1st connection Member 62 Second connecting member 70 Press mechanism

Claims (6)

A vibration reduction structure for a vehicle seat,
A seat frame having a floor side seat frame attached to a vehicle body floor and a seat back frame attached to the floor side seat frame via a reclining shaft so as to be tiltable;
A sliding member provided on the seat back frame;
A friction generating member that slidably contacts the sliding member;
A connecting member for connecting the floor side seat frame and the friction generating member;
A vibration reduction structure for a vehicle seat, comprising: The connecting member has a first connecting member and a second connecting member,
One end side of the first connecting member is connected to one side in the vehicle width direction of the floor side seat frame, and the other end side of the first connecting member is substantially the center in the vehicle width direction of the seat back frame. Connected to the friction generating member arranged in
One end side of the second connecting member is connected to the other side in the vehicle width direction of the floor side seat frame, and the other end side of the second connecting member is a substantially center in the vehicle width direction of the seat back frame. The vibration reducing structure for a vehicle seat according to claim 1, wherein the structure is connected to the friction generating member disposed on the vehicle seat.   3. The vehicle seat vibration reduction structure according to claim 1, wherein the friction generating member is disposed on an occupant side seated on the vehicle seat with respect to the sliding member. 4. A pressing mechanism for pressing the friction generating member against the sliding member;
4. The vibration reducing device for a vehicle seat according to claim 1, wherein the pressing mechanism is provided between the connecting member and the floor side seat frame. 5.   The vibration reducing device for a vehicle seat according to any one of claims 1 to 4, wherein the sliding member is provided on the reclining shaft. The floor side seat frame includes a seat rail portion that enables sliding in the front-rear direction of the vehicle seat,
The seat rail portion has a lower seat rail attached to the vehicle body floor, and an upper seat rail slidably installed on the upper side of the lower seat rail,
One end side of the connecting member is connected to the upper seat rail,
The vibration of the vehicle seat according to any one of claims 1 to 5, wherein the lower seat rail is movably attached to the vehicle body floor via a fixing member. Reduction structure.

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