CN214728666U

CN214728666U - Detector seat assembly

Info

Publication number: CN214728666U
Application number: CN202023324079.3U
Authority: CN
Inventors: 朱群峰; 方治; 杨祺凤; 陆效闪
Original assignee: Autoliv Development AB
Current assignee: Autoliv Development AB
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-16
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a detector seat subassembly. The detector seat assembly comprising a seat and a detector means mounted on said seat for detecting the protraction/retraction length of a seat belt on said seat, said detector means comprising a controller and a hall sensor, wherein the controller is configured to control a motor to rotate a take-up shaft of the webbing belt, the hall sensor is configured to transmit a detected signal related to the rotation of the take-up shaft to the controller, and the controller obtains a withdrawal/retraction length of the webbing belt based on the signal, wherein the detector arrangement comprises only one said controller and a first Hall sensor mounted at a first seat, and a second hall sensor installed at a second seat at a distance from the first seat, wherein the second Hall sensor is a current-type Hall sensor and is in communication with the controller.

Description

Detector seat assembly

Technical Field

The utility model relates to a vehicle accessory specifically relates to detector seat subassembly.

Background

It is known to provide a seat in a vehicle with a seatbelt apparatus to protect a vehicle occupant. In the seatbelt apparatus, the winding shaft may be driven by a motor to rotate in a retracting direction or a withdrawing direction of the seatbelt to retract the seatbelt or to withdraw the seatbelt. Accordingly, a detector is provided on the seat for detecting the protracted or retracted length of the seat belt, for example to transmit this information to other modules in some cases to perform other operations, for example to determine whether the seat belt is worn correctly.

However, considering that a plurality of seats are provided in the vehicle, a seatbelt device and a detector need to be provided for each seat, which results in higher cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low cost detector seat subassembly.

The utility model provides a detector seat subassembly, it includes the seat and installs the detector device on the seat, the detector device is used for detecting the length of pulling out/retrieving of the safety belt on the seat, the detector device includes controller and hall sensor, wherein, the controller is used for controlling the motor in order to drive the reel rotation of safety belt, hall sensor is used for transmitting the signal that detects with the rotation of reel is correlated with to the controller, and, the controller obtains the length of pulling out/retrieving of safety belt based on the signal,

wherein,

said detector means comprising only one said controller and a first hall sensor mounted at a first seat, and a second hall sensor mounted at a second seat at a distance from said first seat,

wherein the second Hall sensor is a current-type Hall sensor and is in communication with the controller.

According to the utility model discloses an embodiment, every second seat department the quantity of second hall sensor is set up to two.

According to an embodiment of the invention, two said second hall sensors are each connected to said controller via one wire harness.

According to the utility model discloses an embodiment, first hall sensor is voltage type hall sensor.

According to an embodiment of the invention, the first seat is configured as a driver seat and the second seat is configured as a rear or front passenger seat.

According to an embodiment of the present invention, two of the second hall sensors are connected to the controller via one wiring harness in common by current coding.

According to an embodiment of the invention, the controller is configured as a micro control unit.

According to an embodiment of the invention, the first hall sensor is mounted on a housing of the controller.

According to an embodiment of the invention, the second hall sensor is arranged to determine the pull out/retraction length of the safety belt by: each current signal represents the same pull-out/retraction distance of the seat belt, and the timing between the current signals represents the seat belt pull-out/retraction direction.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like numbering represents like elements, and wherein:

figure 1 schematically illustrates a detector seat assembly according to an embodiment of the present invention.

Figure 2 schematically illustrates a detector seat assembly according to another embodiment of the present invention.

Figure 3 schematically illustrates the detection principle of a detector seat assembly according to an embodiment of the invention.

Detailed Description

Specific embodiments of the detector seat assembly according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and drawings are included to illustrate the principles of the invention, and the invention is not limited to the preferred embodiments described, but rather, the various embodiments described may be used alone or in any combination, and the scope of the invention is defined by the claims.

In addition, spatially relative terms (such as "upper," "lower," "left," and "right," etc.) are used to describe one element's relative positional relationship with another element as illustrated in the figures. Spatially relative terms may therefore apply in other orientations than those illustrated in the figures, when used. It will be apparent that although for ease of illustration all of these spatially relative terms refer to the orientation shown in the drawings, those skilled in the art will appreciate that orientations other than those shown in the drawings may be used.

Figure 1 schematically illustrates a detector seat assembly according to an embodiment of the present invention. A detector seat assembly according to an embodiment of the present invention is described below with reference to fig. 1.

As shown in fig. 1, a detector seat assembly according to the present invention includes a seat (not shown) and a detector device 10 mounted on the seat, the detector device 10 being for detecting the pull-out/retraction length of a seat belt on the seat. The detector means comprises a controller 13 for controlling the motor to drive the rotation of the winding shaft of the safety belt and a hall sensor for transmitting a detected signal relating to the rotation of the winding shaft to the controller 13, and the controller 13 obtains the withdrawal/retraction length of the safety belt on the basis of the above signal.

It is noted that the detector device 10 detects the position of the rotor of the motor 14 by using the cooperation of the hall sensor and the magnetic disk 15 when detecting the drawn length or the retracted length of the webbing, and obtains the drawn length or the retracted length of the webbing based on the detected rotor position of the motor, which is known in the art and thus will not be described in detail herein.

In one example of the present invention, the hall sensor is mounted on the housing of the controller 13, and the controller housing remains stationary relative to the disk 15. This is merely an example and the detector arrangement of the invention is not limited thereto, for example, the hall sensor may also be mounted on the housing of the motor, which likewise remains stationary relative to the disk 15.

The detector arrangement 10 will be described with continued reference to fig. 1.

As shown in fig. 1, the detector arrangement 10 comprises only one controller 13 and a first hall sensor 11 mounted at a first seat, and a second hall sensor 12 mounted at a second seat at a distance from the first seat. Also, the second hall sensor 12 is a current type hall sensor and communicates with the controller 13.

The current type Hall sensor is suitable for long-distance signal transmission, and has better stability and interference resistance. Therefore, in the detector seat assembly of the present invention, the cost is reduced by sharing one controller with a plurality of sensors while ensuring reliability.

Also, as a preferred embodiment, the first hall sensor 11 is a voltage type hall sensor.

For example, the first seat is configured as a driver seat, and the second seat is configured as a rear or front passenger seat. Preferably, the number of the second seats is set to be plural, and is configured to include a front passenger seat and a rear passenger seat.

According to an embodiment of the present invention, as shown in fig. 1, the number of the second hall sensors 12 at each second seat is set to two.

As one example, as shown in fig. 1, two second hall sensors 12 are each connected to the controller 13 via one wire harness.

As another example, as shown in fig. 2, two second hall sensors 12 are connected to the controller 13 via a common one of the wiring harnesses by current coding. This reduces the number of wire harnesses, and therefore, further reduces the cost.

And, as an embodiment of the present invention, the controller is configured as a micro control unit. However, this is merely an example, and the controller of the present invention is not limited thereto, and may be provided as another form of control unit.

Figure 3 schematically illustrates the detection principle of a detector seat assembly according to an embodiment of the invention. The detection principle of the detector seat assembly according to an embodiment of the present invention is described below with reference to fig. 3.

As shown in fig. 3, a current timing chart of the current signal detected by the second hall sensor 12 is shown. Also, the second hall sensor 12 is arranged to determine the pull-out/retraction length of the seat belt by: five current values are shown in fig. 3, if the detected current signals C1, C2, C3, C4 and C5 are the time sequence shown in fig. 3, it is indicated that the disk has rotated in the forward direction, and thus it is determined that the seat belt is retracted, and at the same time, each current signal indicates a specific retraction length, and the retraction lengths indicated by C1, C2, C3, C4 and C5 are added to obtain the retraction length of the seat belt. On the contrary, if the detected current signals C1, C2, C3, C4 and C5 are of the reverse timing of the timing shown in fig. 3, it is indicated that the operation of reverse rotation of the magnetic disk occurs, thereby determining that the webbing is pulled out, and at the same time, each current signal indicates a specific pull-out length, for example, each of 1 cm. The pullout lengths indicated by C1, C2, C3, C4, and C5 are added to obtain the pullout length of the webbing.

It will be understood that the current timing diagram shown in fig. 3 is merely an example, the detector arrangement of the present invention is not limited thereto, and that the detector arrangement of the present invention may employ any method that meets the constraint that each current signal represents the same pull/retract distance of the seat belt, and that the timing between the current signals represents the seat belt pull/retract direction

As described above, although the exemplary embodiments of the present invention have been described in the description with reference to the drawings, the present invention is not limited to the above-described embodiments, and the scope of the present invention should be defined by the claims and their equivalents.

Claims

1. A detector seat assembly comprising a seat and a detector device (10) mounted on the seat, the detector device (10) being for detecting the protracted/retracted length of a safety belt on the seat, the detector device (10) comprising a controller (13) and a Hall sensor, wherein the controller (13) is for controlling a motor (14) to drive a take-up shaft of the safety belt in rotation, the Hall sensor is for transmitting a detected signal relating to the rotation of the take-up shaft to the controller (13), and the controller (13) derives the protracted/retracted length of the safety belt based on the signal,

it is characterized in that the preparation method is characterized in that,

the detector device (10) comprises only one said controller (13) and a first Hall sensor (11) mounted at a first seat, and a second Hall sensor (12) mounted at a second seat at a distance from the first seat,

wherein the second Hall sensor (12) is a current type Hall sensor and is in communication with the controller (13).

2. The detector seat assembly of claim 1 wherein the number of second hall sensors (12) at each second seat is provided as two.

3. The detector seat assembly of claim 2 wherein the two second hall sensors (12) are each connected to the controller (13) via one wire harness.

4. The detector chair assembly of claim 3, wherein the first Hall sensor (11) is a voltage-type Hall sensor.

5. The detector seat assembly of claim 4, wherein the first seat is configured as a driver seat and the second seat is configured as a rear or front passenger seat.

6. The detector chair assembly of claim 5, wherein the two second Hall sensors (12) are connected to the controller (13) via a common one of the wiring harnesses by current coding.

7. The detector chair assembly of claim 6, wherein the controller (13) is configured as a micro control unit.

8. The detector chair assembly of claim 7, wherein the first hall sensor (11) is mounted to a housing of the controller (13).

9. The detector seat assembly of claim 8, wherein the second hall sensor (12) is arranged to determine the pull/retract length of the seat belt by: each current signal represents the same pull-out/retraction distance of the seat belt, and the timing between the current signals represents the seat belt pull-out/retraction direction.