JPH0435227Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention consists of a seat side rail that supports a seat, a vehicle body side rail that is slidably fitted to the seat side rail and fixed to the floor of the vehicle body. The present invention relates to an automobile seat slide device comprising:

``Prior Art'' In recent automobiles, the end of the seat belt is fixed to the seat side rail of the seat slide device in order to prevent the seat belt from changing its attachment state even when the seat is moved. I'm getting used to it.

The end of the seat belt is wrapped around a retractor, the retractor is fixed to the seat slide device, and the end of the seat belt is fixed to the seat slide device via the retractor. A sensor is attached to the seatbelt, which normally allows the seatbelt to be retracted from the retractor so that the human body is not restrained.If acceleration is applied due to a collision, etc., the degree of acceleration is detected by the acceleration sensor and the seatbelt is prevented from being retracted from the retractor. It is used to restrain the human body.

However, when the seat is moved back and forth to adjust its position, the retractor also moves, so the acceleration during movement is detected by an acceleration sensor, causing the inconvenience that the seatbelt cannot be extended.

Therefore, it is desirable to detect the locked state of the seat slide device and enable the seat belt to be extended regardless of the acceleration sensor when the seat is being moved to adjust its position.

The condition under which the seat belt can be retracted from the retractor regardless of detection by the acceleration sensor is when the seat slide device is in a completely unlocked state.

In addition, if the latch member of the locking mechanism of the seat slide device does not fit well with the locking part, and the latch member rides on the locking part even after releasing the operating handle, the vehicle may drive without realizing it. In such a situation, a collision or the like may occur, so for safety reasons, in such a case, it is preferable to disable the seat belt from being extended from the retractor when the acceleration sensor detects an acceleration higher than the set value.

A conventional technique for detecting a lock state is disclosed in, for example, Japanese Utility Model Application No. 51-115314.

That is, in order to detect incomplete locking of the latch member of the lock mechanism that fixes the seat side rail and the vehicle body side rail, the publication describes a lock detection switch that is separate from the latch member and detects the position of the latch member. What is provided is disclosed.

``Problems to be Solved by the Invention'' However, in such conventional technology, the lock detection switch is provided separately from the latch member, so it is complicated to install it, and it is difficult to connect it with the latch member. Although it is difficult to obtain accurate positional relationships and it is possible to clearly detect incompletely locked states of the latch member, it is set to detect subtle movements of the latch member, such as when the latch member rides on the locking part. However, even if it were possible to set the lock detection switch, if the position or state of the lock detection switch changed, it could no longer be detected, which could lead to problems with stability and durability.

The present invention was developed by focusing on these conventional problems, and provides an automobile seat slide device that is easy to assemble, can perform highly accurate detection, and is equipped with an inexpensive and highly reliable lock detection switch. It is intended to.

``Means for Solving the Problems'' The gist of the present invention for achieving the above purpose is as follows: A seat-side rail that supports the seat; In an automobile seat slide device consisting of a vehicle body side rail that is fixed to a vehicle body side rail, a locking portion having an engagement hole or an engagement notch connected thereto is provided on the vehicle body side rail, and a locking portion is selectively placed at an appropriate position of the locking portion. A locking mechanism is constructed by providing a latch member on the seat side rail, which has an engaging end that is inserted through and fits into the seat side rail, and is engaged and detached by an operating handle, and a connecting hole is formed in the latch member, and the connecting hole is formed in the latch member. The operating end of the operating handle is inserted into the hole, the operating end of the operating handle is made of a conductive material to serve as an operating terminal, and an insulated receiving terminal is fixed to the edge of the connecting hole that is pushed by the operating end when the lock is released. The present invention relates to a seat slide device for an automobile, characterized in that it is equipped with a lock detection switch comprising a lock detection switch.

"Operation" When the engaging end of the latch member is completely engaged with the locking part of the rail on the vehicle body side, the receiving terminal fixed to the latch member and the operating terminal of the operating end of the operating handle are separated from each other. The lock detection switch is turned off, indicating that the lock mechanism is fully locked.

At this time, the operation of the acceleration sensor of the seatbelt retractor is effective, and when an impact such as a collision is applied, the seatbelt cannot be extended from the retractor, and the human body is restrained.

When the operating handle is moved, the latch member is disengaged from the locking portion, and when the lock is fully unlocked, the seat side rail can be moved. At this time, the receiving terminal of the latch member and the operation terminal of the operating handle are in contact, the lock detection switch is turned on, the operation of the acceleration sensor is disabled, and the seat belt can be freely extended from the retractor. be.

When the operating handle is returned to the desired position, the latch member attempts to engage the catch. When the engaging end of the latch member is completely fitted into the locking part and the handle of the operating handle is released, the lock detection switch turns off as described above, thereby detecting that the lock is fully locked. can do.

If the engagement end of the latch member does not fit into the engagement hole or engagement notch of the locking part and rides on it, the handle of the operating handle will be released and the operator will be in a completely locked state. . The distal end of the engaging end of the latch member is pressed against the rail on the vehicle body side, and the receiving terminal of the latch member and the operating terminal of the operating handle are separated, and the lock detection switch is turned off, causing the acceleration to increase in the same way as in the fully locked state. Sensor operation is valid.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 to 3 show an embodiment of the present invention.

A seat slide device 20 is installed under the seat portion 10 of the seat to support it.

The seat slide device 20 includes a rail unit 2
1 is disposed under the seat portion 10 in the front-rear direction, and a rail unit (not shown) having a similar configuration is disposed parallel to this rail unit 21.

Each rail unit 21 includes a seat side rail 22 that supports the seat portion 10, and a vehicle body side rail 23 that is slidably fitted to the seat side rail 22 and fixed to the floor of the vehicle body.

A belt connection bracket 2 is attached to the seat side rail 22.
A seatbelt 11 is fixed to this connecting bracket 22a via a retractor 12.

The retractor 12 normally retracts the end of the seat belt 11 so that it can be easily extended, and includes an acceleration sensor 13 and a restraint mechanism 14 that restrains the seat belt 11 from being extended when the acceleration sensor 13 detects an acceleration higher than a set value. It is equipped with

A part of the side wall 24 of the vehicle body side rail 23 is the locking part 2
5, and the locking portion 25 has engagement holes 26, 2.
6... are arranged in series in the longitudinal direction.

A lock mechanism 30 is provided on the seat side rail 22. The lock mechanism 30 is connected to the seat side rail 22.
A latch member 32 is movably supported on a base bracket 31 fixed to the base bracket 31, and an operation handle 35 for moving the latch member 32 backward is provided.

The middle part of the latch member 32 of the lock mechanism 30 is attached to the front and rear support pieces 31a, 31 of the base bracket 31.
The base bracket 31 is inserted into the base bracket 31 and can be moved forward and backward.
is supported by

The tip of the latch member 32 forms an engaging end 33 that selectively fits into the engaging hole 26 at an appropriate position in the locking part 25 of the vehicle body side rail 23, and the engaging end 33 is split into two parts. There is.

The operating handle 35 is pivotally connected to the base bracket 31 with a pivot pin 35a, and a handle 35 is attached to the free end of the operating handle 35.
b is provided. An operating end 36 is bent at the tip of the end extending from the pivot pin 35a, and the operating end 36 is inserted into and engaged with a connecting hole 34 bored in the middle of the latch member 32.

The operating handle 35 and its operating end 36 are made of a conductor, and the back surface of the operating end 36 serves as an operating terminal 36a. On the other hand, a receiving terminal 34 is attached to the edge of the connecting hole 34 of the latch member 32, which is pushed by the operating terminal 36a of the operating end 36 when the lock is released.
The receiving terminal 34a and the operating terminal 36a constitute a lock detection switch 37.

A connecting wire 37a is fixed to the receiving terminal 34a, and the operating handle 35 is biased in the release direction by a biasing spring 35c, as shown in FIG. 3, and when the operating handle 35 is opened, The operating terminal 36a is spaced apart from the receiving terminal 34a.

A compression spring 38 is tensioned between the support piece 31a of the base bracket 31 and a pin 32a implanted in the middle of the latch member 32, thereby urging the latch member 32 in the forward direction.

FIG. 4 shows a detection circuit diagram 40, in which the power supply 4
1, the normally open contact 43a of the relay 43 and the solenoid 43b are connected to the normally open contact 43a, and the sensor release switch 44 is connected to the normally open contact 43a, while the solenoid 43b
A lock detection switch 37 is connected to the lock detection switch 37.

The sensor release switch 44 is for releasing the function of the acceleration sensor 13 of the retractor 12.
As shown in the figure, it is mounted within the retractor 12.

Next, the action will be explained.

When the locking mechanism 30 of the seat slide device 20 is in the fully locked state, the locking mechanism 30 and the lock detection switch 37 are operated as shown in FIGS. 2 and 5a.
The operating end 3 of the operating handle 35 is in the state shown in FIG.
The operation terminal 36a of 6 is connected to the connection hole 3 of the latch member 32.
4, and the lock detection switch 37 is turned off.

In the detection circuit diagram 40 shown in FIG. 4, the lock detection switch 37 is off, so the solenoid 43b of the relay 43 is not energized, the normally open contact 43a remains OFF, and the sensor release switch 44 is not energized.

The function of the acceleration sensor 13 of the retractor 12 is effective, and if a shock is applied to the car due to a collision or the like,
When the acceleration sensor 13 detects an acceleration higher than a set value, the restraint mechanism 14 restrains the seat belt 11 from being extended, and the seated person is restrained to ensure safety.

When holding the handle 35b and swinging the operating handle 35 counterclockwise as seen from above in FIG. 2, the operating end 36 moves the latch member 32 backward, and the engaging end 33 engages the locking portion 25 at the current position. It comes out of the hole 26, and the seat side rail 22 becomes movable.

At this time, the latch member 32 constituting the lock detection switch 37 is displaced from a to c in FIG.
Operating terminal 36a of operating end 36 of operating handle 35
is the receiving terminal 34a of the connecting hole 34 of the latch member 32.
When pressed, conduction is established and the lock detection switch 37 is turned on.

In the detection circuit diagram 40, as a result of the lock detection switch 37 being turned on, the solenoid 43b of the relay 43 is energized, the normally open contact 43a is turned on, and the sensor release switch 44 is energized.

The retractor 12 is activated by the sensor release switch 44.
The function of the acceleration sensor 13 is released, and even if the acceleration sensor 13 detects acceleration due to an impact when moving the seat, the restraint mechanism 14 will not be in a restraint state, and the seatbelt will be activated as the seat is moved. 11 is lightly let out or reeled in from the retractor 12.

When the handle 35b is released at the desired position, the compression spring 38
and the latch member 32 by the urging force of the urging spring 35c.
and the operating handle 35 returns, and the latch member 3
The position of the engaging end 33 of 2 is the engaging hole 26 of the locking part 25.
5, the latch member 32 will move as shown in FIGS.
, the engaging end 33 fits into the engaging hole 26 and engages, and the seat side rail 22 is restrained.

As described above, in the state shown in FIG. 5a, the lock detection switch 37 of the detection circuit diagram 40 is opened and the sensor release switch 44 is turned off, so that the function of the acceleration sensor 13 of the retractor 12 is effective.
When a shock is applied to the automobile due to a collision or the like and the acceleration sensor 13 detects an acceleration higher than a set value, the restraint mechanism 14 restrains the seat belt 11 from being extended.

The engagement end 33 of the latch member 32 is located at the locking portion 2.
If the latch member 32 is not aligned with the engagement hole 26 of No. 5, as shown in FIG. It's coming back and it's stopped.

Since the operating handle 35 is displaced in the opening direction by the biasing force of the biasing spring 35c, the operating terminal 36a of the operating end 36 is separated from the receiving terminal 34a of the connecting hole 34 of the latch member 32, and the lock detection switch 37
is turned off.

Therefore, when the sensor release switch 44 is turned off and the lock mechanism 30 is in the incompletely locked state even though the handle 35b of the operating handle 35 is released, the acceleration sensor 1 of the retractor 12 is turned off.
Function 3 is effective, and when the acceleration sensor 13 detects an acceleration higher than the set value due to a collision or the like, the restraint mechanism 14 closes the seatbelt 1.
Restricts the rollout of 1.

It goes without saying that the engagement hole in the engagement part may be replaced by an engagement notch, and the engagement part may be formed of a separate member extending from the main body of the rail on the vehicle body side.

``Effects of the invention'' According to the seat slide device of the invention, a lock detection switch can be easily formed by adding a slight configuration to the related parts of the lock mechanism, and the latch member can easily ride on the locking part. It is possible to accurately detect even delicate conditions such as when the vehicle is moving, and can contribute to improved usability when the end of the seatbelt is fixed to the seat side rail via a retractor equipped with an acceleration sensor. . The structure is simple and highly reliable, and there are only a few additional components required, so there is no cost increase. Furthermore, since the locked state is directly detected by the contact between the latch member and the locking part, the accuracy is extremely high.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a cross-sectional view of the main parts of the seat slide device, Figure 2 is a perspective view of the main parts, and Figure 3 is the seat slide device. FIG. 4 is a detection circuit diagram, and FIG. 5 is an operational diagram showing displacement of the latch member. 20...Seat slide device, 21...Rail unit, 22...Seat side rail, 23...Vehicle body side rail, 25...Locking portion, 26...Engagement hole, 3
0... Lock mechanism, 32... Latch member, 33...
...Engaging end, 34...Connecting hole, 34a...Receiving terminal, 35...Operation handle, 36...Operation end, 3
6a...operation terminal, 37...lock detection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] An automobile seat slide device comprising a seat side rail that supports a seat, and a vehicle body side rail that is slidably fitted to the seat side rail and fixed to the floor of the vehicle body. A locking part with a series of matching holes or engagement notches is provided on the rail on the vehicle body side, and an engaging end is selectively inserted and fitted into an appropriate position of the locking part, and the locking part is engaged with the operating handle. A locking mechanism is constructed by providing a latch member to be released on the seat side rail, a connecting hole is bored in the latch member, the operating end of the operating handle is inserted into the connecting hole, and the operating end of the operating handle is inserted into the connecting hole. A seat slide for an automobile, characterized in that it is equipped with a lock detection switch which is made of a conductive material and has an operating terminal, and an insulated receiving terminal is fixed to the edge of the connecting hole which is pressed by the operating end when the lock is released. Device.