CN215244735U

CN215244735U - Acceleration sensor and seat belt retractor

Info

Publication number: CN215244735U
Application number: CN202120424467.4U
Authority: CN
Inventors: 张小芳; 张一麟; 张波; 刘强
Original assignee: Autoliv Development AB
Current assignee: Autoliv Development AB
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-12-21
Anticipated expiration: 2031-02-26

Abstract

The utility model relates to an acceleration sensor and safety belt coiler. The acceleration sensor is used for locking the pulling-out of the safety belt when the deceleration of the vehicle exceeds a preset value, the acceleration sensor comprises an inertia ball and a locking rod, the locking rod can be lifted when the inertia ball deflects to perform the operation of locking the safety belt, and the locking rod is constructed to be of a hollow structure. The safety belt retractor includes the control panel together fixed with the safety belt axle, wherein, still includes the utility model discloses an acceleration sensor, wherein, the locking pole is in can be lifted up during inertia ball skew, with the tooth meshing on the control panel to carry out the locking operation of safety belt.

Description

Acceleration sensor and seat belt retractor

Technical Field

The present invention relates to a safety device for a vehicle, and particularly to an acceleration sensor and a seatbelt retractor.

Background

A seat belt for a vehicle is a safety device for restraining an occupant at the time of a collision, and preventing the occupant from having a secondary collision with a steering wheel, an instrument panel, or the like at the time of the collision, or from being rushed out of the vehicle to cause a death and injury at the time of the collision. A seatbelt, which may also be referred to as a seat belt, for a vehicle is one type of occupant restraint device. Such safety belts are the least expensive and most effective safety devices recognized, and are mandatory in many countries for vehicle installation.

The seatbelt apparatus includes a seatbelt and a seatbelt retractor that winds the seatbelt. When the acceleration in the horizontal direction received by the vehicle is larger than a predetermined value in the event of a vehicle collision or the like, the acceleration sensor detects the acceleration, and the lock mechanism is triggered to operate, thereby making it impossible to pull out the seat belt. The acceleration sensor includes an inertial body (typically, an inertial ball), a lock lever, and a housing, the inertial ball being accommodated in the housing and freely movable, and the lock lever being pivotably connected at one end thereof to the housing so as to be pivotable relative to the housing. During the running of the vehicle, the acceleration sensor vibrates, during which the inertia ball moves slightly and thereby generates a collision noise with the housing or the lock lever. In addition, when the vehicle is suddenly braked, the inertia ball collides with the lock lever, and the collision also generates noise.

Existing acceleration sensors emit noise during vibration, which adversely affects the comfort of occupants in the vehicle and may even distract the driver and adversely affect safe driving.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an acceleration sensor and safety belt coiler, its noise at the vibration in-process is less to improve passenger's comfort level in the vehicle and ensure safe driving.

An aspect of the present invention provides an acceleration sensor for locking the pulling out of a seat belt when the deceleration of a vehicle exceeds a preset value,

the acceleration sensor includes an inertia ball and a lock lever, and the lock lever can be lifted to perform a locking operation of a seat belt when the inertia ball is offset,

wherein,

the locking lever is configured to have a hollowed-out structure.

According to an embodiment of the invention, the locking bar comprises a frame part and an intermediate part fixed with the frame part.

According to an embodiment of the present invention, the lock lever includes an arm portion and an intermediate portion fixed to the arm portion, and both the arm portion and the intermediate portion are configured to have a hollowed-out structure.

According to an embodiment of the present invention, the lock lever includes a frame portion, a connecting portion, and an intermediate portion, and the intermediate portion is connected at the same end of the lock lever as the frame portion via the connecting portion.

According to an embodiment of the invention, the intermediate part is configured as a disc, and the intermediate part is configured as having a hollowed-out structure.

According to an embodiment of the present invention, the intermediate portion is configured to have a first hollowed-out portion and a second hollowed-out portion that are different from each other in at least one of shape or size.

According to an embodiment of the present invention, both the first and second hollowed-out portions are configured in plurality and arranged in a centrosymmetric manner around the center of the middle portion.

Another aspect of the present invention provides a seatbelt retractor, which includes a control panel fixed with a seatbelt shaft,

wherein,

also included is any of the above acceleration sensors, wherein the lock lever can be lifted to engage with the teeth on the control disk when the inertia ball is deflected, thereby performing a locking operation of the seat belt.

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:

fig. 1 shows an acceleration sensor according to an embodiment of the invention.

Fig. 2(a) -2(c) respectively show acceleration sensors according to further embodiments of the present invention.

Detailed Description

Embodiments of an acceleration sensor and a seatbelt retractor 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.

Fig. 1 shows an acceleration sensor according to an embodiment of the invention. An acceleration sensor according to an embodiment of the present invention is described below with reference to fig. 1.

As shown in fig. 1, an acceleration sensor 10 according to the present invention includes an inertia ball 11, a lock lever 12, and a housing 13, the inertia ball 11 being accommodated in the housing 13 and being freely movable, and the lock lever 12 being pivotably connected at one end thereof to the housing 13 so as to be pivotable with respect to the housing 13.

Further, the acceleration sensor 10 of the present invention is used to lock the pulling out of the seat belt when the deceleration of the vehicle exceeds a preset value. Specifically, in the placement orientation of the acceleration sensor 10 shown in fig. 1, when the deceleration of the vehicle exceeds a preset value, the inertia ball 11 will be displaced rightward, continuing to be displaced rightward after contacting the lock lever 12, so that the lock lever 12 is lifted; thereafter, the upper end (shown as a hook-shaped upper end in fig. 1) of the lock lever 12 will engage with teeth on a control disc (not shown) of the seatbelt retractor to prevent the control disc from rotating in the withdrawal direction of the seatbelt; further, since the belt shaft of the seatbelt retractor is fixedly attached to the control panel, when the control panel is not rotatable in the belt-drawing direction by the lock lever 12, the belt shaft is similarly not rotatable in the belt-drawing direction. Therefore, the webbing wound around the webbing shaft cannot be pulled out, thereby completing the operation of locking the webbing.

Further, as shown in fig. 1, in the acceleration sensor 10 of the present invention, the lock lever 12 is configured to have a hollow structure. Specifically, in the embodiment of the present invention shown in fig. 1, the locking lever 12 includes a frame part 121 and an intermediate part 122 fixed to the frame part 121, the intermediate part 122 is at least partially located in the space defined by the frame part 121 and is located in the same plane as the frame part 121, and the inertia ball 11 will contact the intermediate part 122 when deflected to the right to lift the locking lever 12. Also, the intermediate portion 122 is configured in a disk shape, and only the intermediate portion 122 of the lock lever 12 is configured to have a hollowed-out structure.

It can be understood that, during running of the vehicle as described above, the acceleration sensor vibrates, during which the inertia ball moves slightly and thus generates noise by collision with the lock lever; further, when the deceleration of the vehicle exceeds a preset value in the placement orientation of the acceleration sensor shown in fig. 1, the inertia ball 11 is displaced rightward and collides with the lock lever 12, specifically, the intermediate portion 122 of the lock lever 12 to generate noise. Since the intermediate portion 122 is configured to have a hollow structure in the acceleration sensor 10 of the present invention, the sound radiation efficiency when the intermediate portion having a hollow structure collides with the inertia ball is lower than when the solid intermediate portion collides with the inertia ball, and thus the radiated noise is smaller; at the same time, since the intermediate portion having the hollowed-out structure and thus the lock lever have low rigidity, vibration energy transmitted to other components (for example, a housing of the acceleration sensor) is low, which is advantageous for further reducing noise. Therefore, according to the utility model discloses an acceleration sensor is less at the noise of vibration in-process, has the advantage that improves passenger's comfort level in the vehicle and ensure safe driving.

In the embodiment according to the present invention shown in fig. 1, as an example, the middle portion 121 is configured to have a first hollowed-out portion 1221 and a second hollowed-out portion 1222, the first hollowed-out portion 1221 is configured to be triangular-shaped, the second hollowed-out portion 1222 is configured to be triangular-shaped, and the size of the first hollowed-out portion 1221 is larger than the shape of the second hollowed-out portion 1222. Of course, this is merely an example, and the first and second hollowed-out portions in the locking lever of the present invention may also be designed differently, for example, the first and second hollowed-out portions are designed to be the same size or different shapes, which will be described in detail below with reference to fig. 2(a) -2 (c).

As an example of the present invention, as shown in fig. 1, both the first hollow 1221 and the second hollow 1222 are configured in plurality and arranged in a centrosymmetric manner around the center of the middle portion 122. This facilitates even weight distribution of the lock lever and convenient processing of the plurality of hollowed-out portions.

Fig. 2(a) -2(c) respectively show acceleration sensors according to further embodiments of the present invention. Acceleration sensors according to other embodiments of the present invention are described below with reference to fig. 2(a) -2(c), respectively. It should be noted that the embodiment shown in fig. 2(a) -2(c) is substantially the same as the embodiment shown in fig. 1, and the differences between the respective embodiments shown in fig. 2(a) -2(c) and the embodiment shown in fig. 1 will be mainly described below, and the same points will not be described again to avoid redundancy.

As shown in fig. 2(a), in the present embodiment, the lock lever includes a frame portion 121 and an intermediate portion 122, the intermediate portion 122 is configured in a disk shape, and particularly, the intermediate portion 122 is configured to have a hollowed-out structure, that is, to have a first hollowed-out portion 1221 and a second hollowed-out portion 1222. The intermediate portion 122 of the lock lever is connected to the same end of the lock lever 12 (i.e., the lower end of the lock lever shown in the drawing) as the frame portion 121 through the connecting portion 123, and the connecting portion 123 is fixed with the frame portion 121, and thus the intermediate portion 122 is fixed with the frame portion 121 to move together. Also, the connection part 123 is also provided to have a hollowed-out structure, i.e., to include the third hollowed-out part 1231. As shown in fig. 2(a), the first hollowed-out portion 1221 is configured as a circular hole, the second hollowed-out portion 1222 is configured as a triangular shape, and both the first hollowed-out portion 1221 and the second hollowed-out portion 1222 are configured in a plurality and are arranged in a centrosymmetric manner around the center of the middle portion 122; and, the third hollowed portions 1231 are configured as circular holes, the circular holes of the third hollowed portions 1231 are larger than the circular holes of the first hollowed portions 1221, and the plurality of third hollowed portions 1231 are uniformly distributed on the connection part 123 in a matrix form. Further, in the lock lever shown in fig. 2(a), the intermediate portion 122 and the frame portion 121 are located in two different planes. It will be appreciated that the different locking levers shown in figures 2(a) and 1 are advantageous for adapting to different configurations of seat belt retractors.

As shown in fig. 2(b), in the present embodiment, the lock lever includes a frame portion 121 and an intermediate portion 122 fixed together with the frame portion 121, the intermediate portion 122 is configured to be disc-shaped, and particularly, the intermediate portion 122 is configured to have a hollowed-out structure, that is, to have a first hollowed-out portion 1221 and a second hollowed-out portion 1222. As shown in fig. 2(b), the first hollowed-out portion 1221 is configured as a circular hole, the second hollowed-out portion 1222 is configured as a triangular shape, and both the first hollowed-out portion 1221 and the second hollowed-out portion 1222 are configured in a plurality and are arranged in a centrosymmetric manner around the center of the middle portion 122. Further, the intermediate portion 122 and the frame portion 121 are located in two different planes. One circular end surface of the intermediate portion 122 is connected to the frame portion 121. It will be appreciated that the different locking levers shown in figures 2(b) and 2(a) and figure 1 are advantageous for adapting to different configurations of seat belt retractors.

As shown in fig. 2(c), in the present embodiment, the lock lever 12 includes the arm portion 124 and the intermediate portion 122 fixed together with the arm portion 124, the intermediate portion 122 is configured to be disc-shaped, and particularly, both the intermediate portion 122 and the arm portion 124 are configured to have a hollowed-out structure, that is, the intermediate portion 122 has a first hollowed-out portion 1221, and the arm portion 123 has a fourth hollowed-out portion 1241. Further, the intermediate portion 122 and the frame portion 121 are located in two different planes, and one circular end surface of the intermediate portion 122 is connected to the arm portion 124. As shown in fig. 2(c), the first hollowed-out portion 1221 is configured in a triangular shape, and the first hollowed-out portion 1221 is configured in a plurality and arranged in a centrosymmetric manner around the center of the middle portion 122, and a plurality of fourth hollowed-out portions 1241 are uniformly distributed on the arm portion 124 in a matrix form. It will be appreciated that the different locking levers shown in figures 2(c) and 2(a), 2(b) and 1 are advantageous for adapting to different configurations of seat belt retractors.

It should be noted that the specific structure of the lock lever described above with reference to the drawings is merely an example, and the acceleration sensor of the present invention may be designed as a lock lever including an inertia ball and various other structures.

As described above, the utility model provides a safety belt retractor is still provided, this safety belt retractor includes the utility model discloses an acceleration sensor and control panel to, acceleration sensor's locking pole can be lifted up when inertia ball skew, with the tooth meshing on the control panel, carries out the locking operation of safety belt. It should be noted that the advantages described above with reference to the acceleration sensor of the present invention apply equally to the seat belt retractor of the present invention.

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. An acceleration sensor (10) for locking the withdrawal of a seat belt when the deceleration of a vehicle exceeds a preset value,

the acceleration sensor (10) includes an inertia ball (11) and a lock lever (12), and the lock lever (12) can be lifted to perform an operation of locking a seat belt when the inertia ball (11) is offset,

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

the locking lever (12) is designed to have a hollow-out structure.

2. Acceleration sensor according to claim 1, wherein the locking lever (12) comprises a frame part (121) and an intermediate part (122) fixed with the frame part (121).

3. The acceleration sensor according to claim 1, wherein the lock lever (12) includes an arm portion (124) and an intermediate portion (122) fixed to the arm portion (124), and wherein both the arm portion (124) and the intermediate portion (122) are configured to have a hollowed-out structure.

4. The acceleration sensor according to claim 1, wherein the lock lever (12) comprises a frame part (121), a connecting part (123) and an intermediate part (122), and wherein the intermediate part (122) is connected at the same end of the lock lever (12) as the frame part (121) via the connecting part (123).

5. Acceleration sensor according to claim 2 or 3, wherein the intermediate part (122) is configured as a disc and wherein the intermediate part (122) is configured with a hollowed-out structure.

6. The acceleration sensor according to claim 5, wherein the intermediate portion (122) is configured to have a first cutout (1221) and a second cutout (1222) that are different from each other in at least one of shape or size.

7. The acceleration sensor according to claim 6, wherein the first and second hollowed-out portions (1221, 1222) are both configured in plurality and arranged in a centrosymmetric manner around a center of the middle portion (122).

8. A seat belt retractor comprises a control panel fixed with a seat belt shaft,

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

further comprising an acceleration sensor (10) according to any of the claims 1-7, wherein the locking lever (12) can be lifted to engage with teeth on the control disc when the inertia ball (11) is deflected, thereby performing a locking operation of a safety belt.