JP4679196B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device having a lower rail member fixed to a vehicle floor surface and an upper rail member to which a seat cushion (seat portion) is attached, and capable of adjusting the front-rear position of a vehicle seat. In particular, the present invention relates to a seat slide device in which the upper rail member can be moved on the lower rail member by screwing a screw shaft provided on the lower rail member side and a worm wheel provided on the upper rail member side.

  Many one-box type vehicles represented by “minivans” and “cab wagons” are equipped with three rows of seats. In general, passengers get on and off the rear seat doors with respect to the seats installed in the third row (hereinafter referred to as “third row seats”). However, when an occupant gets into the third row seat, the seat installed in the row immediately before these seats (hereinafter referred to as “second row seat”) blocks the route for getting on and off. Become. Therefore, a “walk-in function” is added to the second row seat, and the second row seat can be slid (moved) forward (or backward).

  With regard to the “walk-in function”, as described in Patent Document 1 and Patent Document 2, the walk-in function is activated by hand operation from the driver's seat, or the seat back is tilted by the electric control, the front and rear of the seat Techniques that enable movement and the like have been conventionally known.

  Further, in vehicles such as minivans, there is a tendency that various seat arrangements are required according to the purpose and use of the user. As a typical example, the second row seat and the third row seat are greatly moved in the front-rear direction to enlarge the cargo space, or the second row seat and the third row seat are brought close to each other. In addition, the seat back of the second row sheet is tilted forward, and the back surface of the second row sheet is used as a table.

  In order to realize various seat arrangements as described above, a “long rail” is often employed when the second row seats and the like are installed on the vehicle floor surface. By the way, this long rail originally means the lower rail side in the seat slide device, but the seat slide device has a lower rail longer than the lower rail of the seat slide device used for the driver's seat (passenger seat). Sometimes it refers to itself.

  However, since this long rail has a wide movable range, when the seat is moved over a wide range by manual (manual operation) of the occupant, the occupant is burdened. Therefore, it is preferable to give a structure (power seat system) using a power drive device to the long rail.

  As the power sheet system, the technique described in Patent Document 3 has been disclosed. The technique described in Patent Document 3 is such that a nut (28) is screwed into a lead screw (56), and the nut (28) is rotated to advance and retreat on the lead screw (56). . According to such a technique, it is possible to smoothly slide the upper rail over substantially the entire length of the long rail, which can be said to be an effective technique.

  However, in the technique described in Patent Document 3, when the walk-in operation is performed, the upper rail is always slid (moved) at a constant speed regardless of the adjustment of the front / rear position of the seat at the normal time. There is a problem that the configuration must be adopted. That is, in order to adjust the front / rear position adjustment range of the seat in the normal state, the upper rail moving speed is relatively slow because it is necessary to realize locking (sliding regulation) at a short pitch (section) of 20 mm to 30 mm. You have to set it to the desired speed. When the walk-in function is operated at such a set speed and the seat is moved (slid) over a long section, the movement is felt very slowly.

  Considering the scene in which the walk-in function is actually activated, it is possible to quickly enter the vehicle by quickly moving the second row seat forward. Therefore, it is necessary to realize a seat slide at a high speed during the walk-in operation. In particular, in a scene where an occupant who does not have an umbrella at the time of raining and activates the walk-in function in order to get on the third row seat, it is extremely necessary to realize the seat sliding (moving) at a high speed.

  Even in the technique described in Patent Document 3, although it is possible to increase the moving speed of the seat only during the walk-in operation by electrical control, in that case, various control devices are used. In addition, there is a problem that the manufacturing process and manufacturing cost increase, and there is a problem that the risk of failure increases due to the complexity of the device itself.

  In addition, as power sheet systems, the techniques described in Patent Document 4 and Patent Document 5 have also been disclosed. The technology described in these patent documents is that the worm wheel (64) is screwed to the screw shaft (63), and the worm wheel (64) is rotated and the screw shaft (63) is rotated. The upper rail (30, 50) is quickly slid. Therefore, when these techniques are applied to the walk-in seat, it is possible to quickly slide the seat, and it can be said that this technique is very excellent in this respect.

  However, when the techniques described in Patent Document 4 and Patent Document 5 are applied to the walk-in seat as they are, the driving force (output) of the motor becomes excessive, which is not reasonable in terms of cost and apparatus weight. There is. Because, in the technology described in the above-mentioned patent document, because it is a structure that assumes a front-rear slide in a state where an occupant is seated on a seat, regardless of whether it is a low-speed slide or a high-speed slide, This is because the use of a high-power motor is inevitable for the rotation of the worm wheel (64) and the screw shaft (63).

  Certainly, it is generally a second row seat that is installed near the rear seat door that needs to be given a walk-in function, and this second row seat is often a three-seat seat. That is, when performing fine adjustment of the front / rear position of the seat, even if three passengers are seated on the seat and all the weight is left in the seat, the seat is reliably slid back and forth. In order to achieve this, a high output motor driving force is required.

  However, since the walk-in function is normally operated in a state where no occupant is seated on the seat, the motor that operates only during the walk-in does not necessarily have to have a high output. In this regard, when the seat is slid back and forth with the occupant seated on the seat, the occupant's safety and motor torque can be ensured by slowly sliding the seat.

The present invention has been devised to realize such a point, and the problems to be solved are as follows.
JP-A-6-328773 JP-A-8-126541 Japanese Patent Laid-Open No. 11-11186 Japanese Patent No. 3233763 Japanese Patent No. 3233764

  That is, the present invention combines a high-output motor and a low-output motor so that when the occupant is seated on the seat, only the high-output motor is driven to slide back and forth while the occupant is seated on the seat. An object of the present invention is to provide a seat slide device that can drive only a low-output motor or both a low-output motor and a high-output motor when it is not present, and enables quick back-and-forth sliding with a simple structure at low cost.

  In order to solve the above problems, the means adopted by the present invention are as follows.

First, the seat slide device 100 according to the first aspect of the invention is disposed along the upper rail member 10 to which a seat cushion can be attached, the lower rail member 20 that can be fixed to the floor surface of the vehicle, and the lower rail member 20. The screw shaft 30 whose both ends are supported by the lower rail member 20, the first motor 40 that rotates the screw shaft 30, and the upper rail member 10 are rotatably provided, and are screwed onto the screw shaft 30. A worm wheel 50 that rotates, a second motor 60 that rotates the worm wheel 50, an occupant detection unit that detects the presence or absence of an occupant on the seat cushion mounted on the upper rail member 10, and a detection by the occupant detection unit Based on the presence or absence of a passenger, the first motor 40 and the 2 controls the operation of the motor 60, when it is detected the passenger seating is characterized in that and a control unit for stopping the operation of the second motor 60.

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Further, the seat slide device 100 of the invention according to claim 2 is disposed along the upper rail member 10 on which the seat cushion can be mounted, the lower rail member 20 that can be fixed to the floor surface of the vehicle, and the lower rail member 20. The screw shaft 30 whose both ends are supported by the lower rail member 20, the first motor 40 that rotates the screw shaft 30, and the upper rail member 10 are rotatably provided, and are screwed onto the screw shaft 30. The worm wheel 50 that rotates, the second motor 60 that rotates the worm wheel, the occupant detection means that detects the presence or absence of an occupant on the seat cushion, and the seat detection of the occupant on the seat cushion by the occupant detection means The first motor 40 is operated and the seat cushion is operated. If it detects a non-seating of the occupant on tio emission is characterized in that and a control unit for operating the second motor 60.

The seat slide device 100 of the invention according to claim 3 is disposed along the upper rail member 10 on which the seat cushion can be mounted, the lower rail member 20 that can be fixed to the floor surface of the vehicle, and the lower rail member 10. The screw shaft 30 whose both ends are supported by the lower rail member 10, the first motor 40 that rotates the screw shaft 30, and the upper rail member 10 are rotatably provided, and are screwed onto the screw shaft 30. The worm wheel 50 that rotates, the second motor 60 that rotates the worm wheel 50, the occupant detection means that detects the presence or absence of an occupant on the seat cushion, and the occupant detection means detect seating of the occupant on the seat cushion. In this case, the first motor 40 is operated and the seat The when it detects a non-seating of the occupant on the cushion to have a control device for actuating the first motor 40 and second motor 60 to rotate in opposite directions to each other the screw shaft 30 and the worm wheel 50 It is a feature.

  The operational effects obtained by the above means are as follows.

First, when the seat slide device 100 according to the first aspect performs fine adjustment of the seat position in the front-rear direction, the first motor 40 is operated by the control device, and the lower rail is driven by the driving force of the first motor 40. The screw shaft 30 disposed along the member 20 is rotated. Since the worm wheel 50 is screwed to the screw shaft 30, the upper rail member 10 is pushed forward through the worm wheel 50 by the rotation of the screw shaft 30, and slides on the lower rail member 20. Since the first motor 40 rotates the screw shaft 30 disposed along the lower rail member 20, it is installed on the lower rail member 20 (or the vehicle body floor surface), that is, on the vehicle body side (not on the upper rail member 10 side). Will be. That is, when the first motor 40 is installed on the vehicle body side, the installation space is not limited as compared with the case where the first motor 40 is installed on the seat side. Therefore, the first motor 40 is a relatively large high-power motor. Can be configured. Therefore, even if the passenger is seated on the seat, the seat can be slid.

When the walk-in is performed by the seat slide device 100 according to the first aspect of the invention, the second motor 60 is operated by the control device, and the worm wheel 50 is rotated by the driving force of the second motor 60 with low output and high rotation. To do. As the worm wheel 50 rotates, the seat slide becomes possible.

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  According to the first aspect of the present invention, when the walk-in is operated, the seat slides back and forth at a relatively high speed. Therefore, it is customary that no occupant is seated on the seat. The second motor 60 that operates only when in is not required to bear the weight of the passenger. Therefore, since the second motor 60 does not require a high output, a small motor having a lower output than the first motor 40 is sufficient, and the seat slide device 100 itself can be reduced in weight and cost. The effect is to become.

According to the first aspect of the present invention, the presence or absence of an occupant on the seat can be detected by the occupant detection means (sensor). By stopping the activation of the walk-in when the sensor detects the seated state of the occupant, it is possible to prevent an excessive load from being applied to the second motor 60, which is a low output motor, in advance. It is possible to prevent the failure of the battery and to improve the durability.

The seat slide device 100 of the invention according to claim 2 or claim 3 has occupant detection means for detecting the presence or absence of an occupant on the seat cushion. When operating the motor with the control device to slide the seat back and forth by the seat slide device 100 of the invention according to claim 2 or claim 3 , when the occupant detecting means detects the seating of the occupant on the seat cushion, Only the first motor 40 is operated.

When the occupant detection means detects that the occupant is not seated on the seat cushion when operating the motor by the control device to slide the seat back and forth by the seat slide device 100 of the invention according to claim 2 , the second The motor 60 is activated. The worm wheel 50 is rotated by the driving force of the second motor 60 with low output and high rotation. As the worm wheel 50 rotates, the seat slide becomes possible.

On the other hand, when operating the motor with the control device to slide the seat back and forth by the seat slide device 100 of the invention according to claim 3 , when the occupant detection means detects the non-sitting of the occupant on the seat cushion, The 1 motor 40 and the 2nd motor 60 operate | move. When the first motor 40 operates, the screw shaft 30 disposed along the lower rail member 20 rotates. Further, the worm wheel 50 is rotated by the operation of the second motor 60 with low output and high rotation. The screw shaft 30 and the worm wheel 50 rotate in directions opposite to each other. The screw shaft 30 and the worm wheel 50 rotate in opposite directions at the same time, so that the moving distance of the upper rail member 10 relative to the lower rail member 20 within a certain period of time is greater than when only one motor is driven. Since it becomes long, a quicker slide becomes possible.

According to the invention according to claim 2 or claim 3 above, when the walk-in is operated, the seat slides back and forth at a relatively high speed, and therefore it is usually that no occupant is seated on the seat. The second motor 60 that operates only during walk-in does not need to bear the weight of the occupant. Therefore, since the second motor 60 does not require a high output, a small motor having a lower output than the first motor 40 is sufficient, and the seat slide device 100 itself can be reduced in weight and cost. The effect is to become. Further, according to the present invention, the presence or absence of an occupant on the seat can be detected by the occupant detection means. When the sensor detects the seating state of the occupant, the operation of the second motor 60, which is a low output motor, is stopped, thereby preventing an excessive load from being applied to the second motor 60 in advance. It is possible to prevent the slide device 100 from being broken and to improve the durability.

  Hereinafter, a seat slide device 100 according to the present invention will be described using examples.

  First, a seat slide device 100 according to the present embodiment is mainly used when installing a second row seat on a vehicle such as a minivan. As shown in FIG. 1, an upper rail member 10 and a lower rail member are used. 20, a screw shaft 30, a first motor 40, a worm wheel 50 (not shown), a second motor 60, a first switch SW1 (not shown), a second switch SW2 (not shown), a sensor (not shown), and the like. Is. Hereinafter, each component will be described.

  The upper rail member 10 is arrange | positioned at the both right and left sides of a vehicle seat, and can mount | wear a seat cushion. In the present invention, the upper rail member 10 may have any shape / structure as long as it can be fitted with a seat cushion, but in this embodiment, as shown in FIG. While forming in the left-right substantially symmetrical shape, these shall be arrange | positioned in the position which mutually opposes.

  As shown in FIG. 4, a roller 11 is pivotally supported at the lower portion of the upper rail member 10, and the roller 11 rotates and moves inside a lower rail member 20 (described later), whereby the lower rail member 20. Thus, the upper rail member 10 can be smoothly slid. A seat mounting nut 12 is fixed to the upper rail member 10 by welding. By mounting a seat cushion on the upper rail member 10 and bolting the nut, the seat cushion can be mounted and fixed.

  The lower rail member 20 fixes the seat slide device 100 to the floor surface of the vehicle and supports the upper rail member 10 to be slidable. In the present invention, the lower rail member 20 may be of any shape and structure as long as it adheres to the floor surface of the vehicle and allows the upper rail member 10 to slide. In this embodiment, as shown in FIG. 3 or FIG. 4, a steel plate is bent by press working, and a cylindrical member having a substantially C-shaped cross section having an upper opening is formed as a pair of left and right, and these are opposed to each other. It is supposed to be placed at the position to be. In particular, in this embodiment, as shown in FIG. 1, long lower rail members 20 called “long rails” are employed, and the distance between these lower rail members 20 is compared on the assumption that a single seat is mounted. Narrow intervals. Of course, in the present invention, the interval between the lower rail members 20 is not particularly limited to this configuration, and is arbitrarily determined according to the width of the vehicle seat to be mounted. A foot member 21 used for adhering to the vehicle floor surface is fixed to the lower surface of the lower rail member 20 by welding.

  Further, end brackets 22 are attached to both ends of the lower rail member 20 in this embodiment so as to close the cross-sectional opening. A through hole is formed in a substantially central portion of the end bracket 22 and a bearing portion is provided so that a screw shaft 30 described later can be supported by the bearing portion.

  The screw shaft 30 is disposed along the lower rail member 20, and both ends thereof are supported by the lower rail member 20. In the present invention, the screw shaft 30 may be disposed along the lower rail member 20 and may have any shape and structure as long as it can be screwed into a worm wheel 50 described later. Then, as shown in FIG. 1 or FIG. 2, it consists of a shaft member formed with substantially the same dimension as the entire length of the lower rail member 20, and a thread groove is formed on the outer peripheral surface of the shaft.

  The first motor 40 rotates the screw shaft 30. In the present invention, the first motor 40 may be of any specification / shape / structure as long as the screw shaft 30 can be rotated. In this embodiment, the first motor 40 is shown in FIGS. Thus, it is conceivable to employ a general-purpose motor that is also used for opening and closing a sliding door of a vehicle. The first motor 40 has output shafts projecting on both sides, one of the output shafts is provided with a worm gear, and can be engaged with an external gear provided at one end of the screw shaft 30. The shaft 30 will rotate. A connecting shaft is connected to the other output shaft, a worm gear is provided at the tip of the connecting shaft, and the screw shaft 30 of the other lower rail member 20 is rotated. In addition, when the structure which drives the said 1st motor 40 at the time of the fine adjustment to the front-back direction of a sheet | seat position is taken, the 2nd motor 60 mentioned later is enough with the small motor whose output is lower than the said 1st motor 40. Thus, the weight and cost of the seat slide device 100 itself can be reduced.

  The worm wheel 50 is rotatably provided with respect to the upper rail member 10 and is screwed into the screw shaft 30. In the present invention, the worm wheel 50 may be of any shape and structure as long as it can be screwed to the screw shaft 30 disposed along the lower rail member 20, but in this embodiment, As shown in FIG. 5, a screw hole having the same pitch as the screw groove of the screw shaft 30 is formed at the center, and the outer peripheral surface is a gear in a reduction gear (gear box) provided in the upper rail member 10. It is formed in the shape of an external gear that can be engaged.

  The second motor 60 rotates the worm wheel 50. In the present invention, the second motor 60 may be of any specification, shape, and structure as long as the worm wheel 50 can be rotated. In this embodiment, the second motor 60 is shown in FIGS. Thus, it is conceivable to employ a general-purpose motor that is also used for opening and closing a sliding door of a vehicle. The second motor 60 has output shafts protruding on both sides, and one output shaft is connected to a reduction gear (gearbox) attached to the upper rail member 10. Further, a connecting shaft is connected to the other output shaft, and the connecting shaft is connected to a reduction gear (gearbox) attached to the other upper rail member 10. In addition, when the structure which drives the said 2nd motor 60 at the time of the fine adjustment to the front-back direction of a sheet | seat position is taken, the above-mentioned 1st motor 40 is enough with the small motor whose output is lower than the said 2nd motor 60. Thus, the weight and cost of the seat slide device 100 itself can be reduced. However, in order to realize a quick seat slide, it is added that it is more realistic to downsize the second motor 60 provided on the upper rail member 10 side.

  The first switch SW1 is electrically connected when the seat position is finely adjusted in the front-rear direction, and is installed on the inner wall surface or the side surface of the seat. The first switch SW1 is turned on by the operation of the passenger. Thus, the first motor 40 is operated. Although not shown in the present embodiment, it is conceivable to install a push button type switch in the vicinity of the vehicle console panel, the rear seat door, or a seat to which a walk-in function is provided.

The second switch SW2 is conductive when the walk-in function is activated, and is installed on the inner wall surface or the side surface of the seat. The first switch SW2 is turned on by an occupant's operation to turn on the first switch SW2. Only the motor 40 or both the first motor 40 and the second motor 60 are operated. In the latter case, when the walk-in is performed by the seat slide device 100, the second switch SW2 is turned on to operate the first motor 40 and the second motor 60. When the first motor 40 operates, the screw shaft 30 disposed along the lower rail member 20 rotates. Further, the worm wheel 50 is rotated by the operation of the second motor 60 with low output and high rotation. The screw shaft 30 and the worm wheel 50 rotate in directions opposite to each other. The screw shaft 30 and the worm wheel 50 rotate in opposite directions at the same time, so that the moving distance of the upper rail member 10 relative to the lower rail member 20 within a certain period of time is greater than when only one motor is driven. Since it becomes long, a quicker slide becomes possible. Although not shown in the present embodiment, it is conceivable to install a push button type switch in the vicinity of the vehicle console panel, the rear seat door, or a seat to which a walk-in function is provided.

The third switch SW3 is electrically connected when the seat position is finely adjusted in the front-rear direction and when the walk-in function is activated, and is installed on the vehicle inner wall surface or the seat side surface. By turning on the switch, the second motor 60 alone (in the case of claim 2 ) or both the first motor 40 and the second motor 60 (in the case of claim 3 ) are operated. . Although not shown in the present embodiment, it is conceivable to install a push button type switch in the vicinity of the vehicle console panel, the rear seat door, or a seat to which a walk-in function is provided.

  The occupant detection means detects whether an occupant is seated on the seat cushion. The sensor is connected to the control device together with the first switch SW1, the second switch SW2, and the third switch SW3. When the sensor detects an occupant on the seat cushion, the activation of the walk-in function is stopped. Become. In the present invention, the sensor may be of any specification, shape, and structure as long as it can detect the presence or absence of an occupant on the seat cushion, but is not particularly illustrated in the present embodiment, but is a weight sensor or area. It is conceivable to install the sensor on a seat cushion, a lower rail, or a vehicle interior wall surface. More specifically, a film-like pressure sensor may be installed in the seat cushion, or a load sensor may be interposed between the lower rail member 20 and the foot member 21. Furthermore, it is also possible to adopt a configuration in which an infrared sensor or an ultrasonic sensor is installed in the vicinity of the seat cushion to detect the presence or absence of an occupant within the detection range of the sensor.

1 is a perspective view of a seat slide device 100 according to the present invention. It is a top view of the seat slide apparatus 100 shown in FIG. It is a partial front view of the seat slide apparatus 100 shown in FIG. It is AA sectional drawing of the seat slide apparatus 100 shown in FIG. FIG. 2 is a transparent side view of the seat slide device 100 shown in FIG. 1.

DESCRIPTION OF SYMBOLS 10 Upper rail member 11 Roller 12 Sheet mounting nut 20 Lower rail member 21 Foot member 22 End bracket 30 Screw shaft 40 First motor 50 Warm wheel 60 Second motor
SW1 1st switch
SW2 2nd switch 100 Seat slide device

Claims (3)

An upper rail member that can be fitted with a seat cushion;
A lower rail member that can be fixed to the floor surface of the vehicle;
A screw shaft disposed along the lower rail member and supported at both ends by the lower rail member;
A first motor for rotating the screw shaft;
A worm wheel provided rotatably with respect to the upper rail member and screwed into the screw shaft;
A second motor for rotating the worm wheel;
Occupant detection means for detecting the presence or absence of an occupant on the seat cushion mounted on the upper rail member;
A control device that controls the operation of the first motor and the second motor based on the presence or absence of a passenger detected by the occupant detection means, and stops the operation of the second motor when seating of the occupant is detected. When,
A seat slide device comprising: An upper rail member that can be fitted with a seat cushion;
A lower rail member that can be fixed to the floor surface of the vehicle;
A screw shaft disposed along the lower rail member and supported at both ends by the lower rail member;
A first motor for rotating the screw shaft;
A worm wheel provided rotatably with respect to the upper rail member and screwed into the screw shaft;
A second motor for rotating the worm wheel;
Occupant detection means for detecting the presence or absence of an occupant on the seat cushion;
Control that activates the first motor when the occupant's seating on the seat cushion is detected by the occupant detection means, and activates the second motor when the occupant is not seated on the seat cushion. Equipment ,
A seat slide device comprising: An upper rail member that can be fitted with a seat cushion;
A lower rail member that can be fixed to the floor surface of the vehicle;
A screw shaft disposed along the lower rail member and supported at both ends by the lower rail member;
A first motor for rotating the screw shaft;
A worm wheel provided rotatably with respect to the upper rail member and screwed into the screw shaft;
A second motor for rotating the worm wheel;
Occupant detection means for detecting the presence or absence of an occupant on the seat cushion;
When the occupant detection means detects the occupant's seating on the seat cushion, the first motor is operated, and when the occupant is not seated on the seat cushion, the screw shaft and the worm wheel are connected to each other. A control device for operating the first motor and the second motor to rotate in the opposite direction to
A seat slide device comprising:

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