Patent Application
20200282870
The technical field relates to a slide rail, and more particularly to an electric drive mechanism of a seat rail capable of preventing the production of abnormal sounds effectively.
To adjust the position of a seat in a car, a seat rail is usually installed between the seat and a car body and capable of sliding back and forth. The seat rail comprises two parallel side rails with an interval apart from each other, and each slide rail includes an outer rail fixed to the car body and an inner rail slidably coupled to the outer rail, and the seat is mounted onto the inner rail.
To control the inner rail to slide with respect to the outer rail, an electric rail has been introduced to the market, wherein a driver is used to drive the inner rail to slide and move with respect to the outer rail.
However, when the conventional electric rail drives the inner rail to slide to a dead point of a stroke, a tall and big user may slide the seat all the way to the bottom towards the rear of the car, and a knocking sound may occur since adjacent objects may collide with each other, and this issue has been criticized for a long time, especially when such abnormal sound occurs in a high-end luxury car.
Therefore, it is a primary object of this disclosure to overcome the drawbacks of the prior art by providing an electric drive mechanism of a seat rail capable of preventing the production of abnormal sounds effectively.
To achieve the aforementioned and other objectives, this disclosure provides an electric drive mechanism of a seat rail, and the electric drive mechanism is installed between an inner rail and an outer rail of the slide rail and driven by a driving device, and the electric drive mechanism comprises: a front frame and a rear frame, disposed apart from each other and fixed to the outer rail; a lead screw, fixed and spanned between the front frame and the rear frame; a gear assembly, fixed to the inner rail and driven by the driving device, and engaged to the lead screw; and a bumper, selectively installed at one of the gear assembly and the rear frame; wherein, the bumper provides a buffering effect between the gear assembly and the rear frame to prevent the production of abnormal sounds.
Compared with the prior art, this disclosure has the following effect. An adjustment of sliding the slide rail all the way to the bottom can be made to prevent the production of abnormal sounds.
The technical contents of this disclosure will become apparent with the detailed description of preferred embodiments accompanied with the illustration of related drawings as follows. It is intended that the embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.
With reference to
With reference to
The front frame 1b and the rear frame are disposed with an interval apart from each other and fixed to an inner bottom wall of the outer rail 8b. In
The lead screw 3 is fixed and spanned between the front frame 1b and the rear frame. To prevent the lead screw 3 from rotating with respect to the rear frame, the lead screw 3 is clamped between the two sidewalls 12. In this embodiment, the lead screw 3 has a non-circular section 31 (for example, at least one cross-section is formed at the outer periphery of the lead screw 3). Therefore, the two sidewalls 12 of the rear frame can be clamped at the non-circular section 31 of the lead screw 3. Particularly, a planar inner wall of the sidewall 12 is clamped at a planar outer cross-section of the non-circular section 31 to prevent the lead screw 3 from rotating with respect to the rear frame. It is noteworthy that a plugging space 14 is formed among the bottom plate 11, two sidewalls 12 and the lead screw 3 (as shown in
The gear assembly 5 is fixed to an inner top wall of the inner rail 8a and driven by the driving device 7. Specifically, a driving rod 71 of the driving device 7 is plugged into a first plug hole 51 of the gear assembly 5, and the driving rod 71 is used for driving the gear assembly 5. The gear assembly 5 is screwed to the lead screw 3 and capable of moving with respect to the lead screw 3. Specifically, the lead screw 3 is plugged into a second plug hole 52 of the gear assembly 5, so that the gear assembly 5 is engaged to the lead screw 3, and the gear assembly 5 can be driven to move with respect to the lead screw 3. Preferably, the gear assembly 5 has the mount 4, and the gear assembly 5 is fixed to an inner top wall of the inner rail 8a by the mount 4.
In
The bumper 2 is installed at the rear frame or the gear assembly 5, and this disclosure is not limited to the aforementioned arrangements. In this embodiment, the bumper 2 is installed at the rear frame. The bumper 2 is made of a buffer material, but this disclosure is not limited by such material only. In this embodiment, the bumper 2 is made of rubber.
In
In
In
In summation of the description above, this disclosure can surely achieve the expected effects and overcome the drawbacks of the prior art, and this disclosure also complies with patent application requirements, and thus is duly filed for patent application.
While this disclosure has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of this disclosure set forth in the claims.
