CN218907174U - Safety belt retractor of automobile and automobile - Google Patents

Abstract

The utility model discloses a safety belt retractor of an automobile and the automobile. The rolling device, the electromagnetic locking device and the liquid sensing device are all arranged in the shell, and the rolling device can rotate relative to the shell. The seat belt of the vehicle is wound around the retractor with at least one end of the seat belt being located outside the housing. The electromagnetic locking device is switchable between a locked state and an unlocked state in response to a change in state of the liquid sensing device such that the retractor is fixed or rotatable relative to the housing. The electromagnetic locking device comprises an electromagnetic component, a magnetic elastic piece and a locking wheel. The locking wheel is fixedly connected to the winding device. One end of the magnetic elastic piece is fixedly connected to the electromagnetic component, and the other end of the magnetic elastic piece can be adsorbed on the electromagnetic component or locked with the locking wheel in a matched mode. The seatbelt retractor of the automobile has an advantage that noise is not easily generated.

Description

Safety belt retractor of automobile and automobile

Technical Field

The utility model relates to the technical field of automobile safety belts, in particular to a safety belt retractor of an automobile and the automobile.

Background

Passenger safety has been one of the main goals sought in the automotive industry. Safety belts are the basic protection devices for protecting the occupants of a car in the event of an accident. When the automobile is in a driving process, if the automobile body suddenly tilts (such as the automobile turns on one's side), the retractor of the safety belt also tilts, and at the moment, the safety belt can be locked by the retractor, so that a driver or a passenger is fixed on a seat for protection, and the angle locking function is realized. If the safety belt is suddenly pulled (such as collision or emergency braking of the automobile), the safety belt can be locked by the retractor, so that a driver or a passenger is fixed on a seat for protection, and the safety belt is an emergency locking function.

The angle-sensitive mechanism involved in the prior art seatbelt retractor mainly consists of a locking wheel, a lever arm, a steel ball and a ball seat. When the car body suddenly tilts, the steel ball also rotates and drives the car lever arm arranged on the steel ball to tilt and match with the locking wheel so as to lock the safety belt. For example, patent publication number CN201304958Y discloses a seatbelt retractor with tilting locking function, the tilting locking mechanism of the seatbelt retractor comprises an inner gear, an outer gear, a steel ball seat, a swing rod assembly, a swing rod seat and a swing block pawl, when an automobile tilts beyond a certain angle, the steel ball can rotate 360 degrees rapidly and push against the swing rod, the swing rod swings to enable the swing block pawl to be clamped to the tooth of the outer gear, the outer gear is stopped, the clamping plate is driven by the swing rod seat to lock the fluted disc, and therefore the winding belt is prevented from being pulled out further, and multi-angle tilting locking is achieved. However, the steel ball is required to be used as a space between the gravity ball and the ball seat so as to meet the degree of freedom of the gravity ball. However, when the vehicle runs on a bumpy road or is in other vibration working conditions, the clearance space can cause the steel ball to shake freely in the mechanism, so that larger noise is generated, and the driving comfort is affected.

Therefore, the seatbelt retractor of the automobile in the related art has a problem in that noise is easily generated.

Disclosure of Invention

The utility model aims to solve the problem that the safety belt retractor of the automobile in the prior art is easy to generate noise.

In order to solve the above problems, an embodiment of the present utility model provides a seatbelt retractor for an automobile, which includes a housing, a retractor, an electromagnetic locking device, and a liquid sensing device. The rolling device, the electromagnetic locking device and the liquid sensing device are all arranged in the shell, and the rolling device can rotate relative to the shell. The seat belt of the vehicle is wound around the retractor with at least one end of the seat belt being located outside the housing. The electromagnetic locking device is arranged above the liquid sensing device and can be in contact with or not in contact with liquid in the liquid sensing device, so that the electromagnetic locking device is switched between a locking state and an unlocking state, and the winding device is fixed or rotates relative to the shell.

When the automobile does not incline and the acceleration value of the automobile is smaller than the preset acceleration value, the liquid in the liquid sensing device does not contact the electromagnetic locking device, and the electromagnetic locking device is in an unlocking state, so that the rolling device can rotate relative to the shell;

When the automobile is inclined or the acceleration value of the automobile is larger than or equal to the preset acceleration value, liquid in the liquid sensing device contacts the electromagnetic locking device, and the electromagnetic locking device is in a locking state, so that the winding device is fixed relative to the shell.

By adopting the technical scheme, the shell is used for protecting the winding device, the electromagnetic locking device and the liquid sensing device. The retractor is used for winding the seat belt. The liquid in the liquid sensing device contacts or does not contact the electromagnetic locking device according to the change of the acceleration of the automobile or the inclined state of the automobile, so that the electromagnetic locking device is in a locking state or an unlocking state. When the electromagnetic locking device is in an unlocking state, the rolling device can rotate relative to the shell, so that a driver can adjust the length of the safety belt according to actual needs; when the electromagnetic locking device is in a locking state, the rolling device is fixed relative to the shell, so that the safety belt can be locked by the safety belt retractor when the automobile body of the automobile suddenly tilts or the automobile collides or emergently brakes, and a driver and passengers are fixed on a seat to be protected. In addition, the locking or unlocking state of the electromagnetic locking device is controlled by contacting or not contacting with liquid in the liquid sensing device, compared with a mechanism in the prior art that a vehicle lever arm arranged on a steel ball is driven to incline by rotation of the steel ball and is matched with a locking wheel so as to lock a safety belt, the safety belt retractor of the automobile is not provided with the steel ball, so that the safety belt retractor of the automobile can avoid free shaking of the steel ball in the mechanism when the automobile runs on a bumpy road or is in other vibration working conditions, and further noise generated by shaking of the steel ball is avoided. Therefore, the seatbelt retractor of the automobile of the present utility model has an advantage that noise is not easily generated. In addition, the electromagnetic locking device is switched between the locking state and the unlocking state by contacting or not contacting with the liquid in the liquid sensing device, and the position state of the liquid in the liquid sensing device is changed according to the change of the acceleration of the automobile or the change of the inclination state of the automobile, so that when the automobile body of the automobile suddenly inclines or the automobile collides or emergently brakes, the position of the liquid in the liquid sensing device is changed at the same time, the electromagnetic locking device is in the locking state rapidly and timely, and drivers and passengers are fixed on a seat rapidly and timely to be protected. The seatbelt retractor of the automobile has the advantage of high safety.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor of an automobile, and an electromagnetic locking device includes an electromagnetic member, a magnetic elastic member, and a locking wheel. The locking wheel is fixedly connected to the winding device. One end of the magnetic elastic piece is fixedly connected to the electromagnetic component, and the other end of the magnetic elastic piece can be adsorbed on the electromagnetic component or locked with the locking wheel in a matched mode.

When the liquid in the liquid sensing device does not contact the electromagnetic component of the electromagnetic locking device, the electromagnetic component is in an electrified state, so that the other end of the magnetic elastic piece is adsorbed on the electromagnetic component and separated from the locking wheel, and the electromagnetic locking device is in an unlocking state;

when the liquid in the liquid sensing device contacts with the electromagnetic component of the electromagnetic locking device, the electromagnetic component is in a power-off state, and the other end of the magnetic elastic piece returns to the position where the magnetic elastic piece is matched with the locking wheel for locking, so that the electromagnetic locking device is in a locking state.

By adopting the technical scheme, when the electromagnetic locking device is in the unlocking state, the other end of the magnetic elastic piece is adsorbed on the electromagnetic component under the action of magnetic attraction and is separated from the locking wheel fixedly arranged on the winding device, so that the winding device can rotate relative to the shell, and a driver and a passenger can conveniently adjust the length of the safety belt. When the electromagnetic locking device is in a locking state, the other end of the magnetic elastic piece loses magnetic attraction and returns to a position matched with the locking wheel for locking, so that the winding device is fixed relative to the shell, and when the automobile body of the automobile suddenly tilts or the automobile collides or emergently brakes, the safety belt can be locked by the safety belt retractor, and then a driver and passengers are fixed on a seat for protection.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor for an automobile, a liquid sensing device including a spherical cup and a conductive liquid disposed within the spherical cup. Wherein, the position that is closest to electromagnetic part on the spherical cup is provided with the mounting hole, and the spherical cup passes through the mounting hole to be connected on electromagnetic part, and electromagnetic part extends to in the mounting hole and can contact with the conducting liquid. And when the automobile does not incline and the acceleration value of the automobile is smaller than the preset acceleration value, the conductive liquid is not contacted with the electromagnetic component. When the automobile tilts or the acceleration value of the automobile is larger than or equal to the preset acceleration value, the conductive liquid is in contact with the electromagnetic component.

By adopting the technical scheme, when the automobile collides or emergently brakes, namely the acceleration value of the automobile is larger than or equal to the preset acceleration value, the speed of the automobile is rapidly reduced in a short time, the liquid level of the conductive liquid in the spherical cup is inclined due to inertia, and then the conductive liquid is contacted with the part of the electromagnetic part extending into the mounting hole. When the automobile body of the automobile tilts in any direction, the liquid level of the conductive liquid in the spherical cup can tilt along with the tilting direction of the automobile body and further contacts with the part of the electromagnetic part extending into the mounting hole. The electromagnetic component can be in the outage state after the conductive liquid contacts with the electromagnetic component, the other end of the magnetic elastic piece returns to the position where the magnetic elastic piece is locked by matching with the locking wheel, and then the electromagnetic locking device is in the locking state, so that when the automobile collides or suddenly brakes or the automobile body suddenly tilts in any direction, the safety belt can be locked by the safety belt retractor, and a driver and a passenger are fixed on a seat for protection. And, compare in other shapes, the setting of spherical cup makes the conductive liquid can be better flow in spherical cup along with the incline direction of automobile body, and then makes electromagnetic locking device's locking process more sensitive for this car's safety belt retractor is more reliable.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor for an automobile, in which a ratio of a conductive liquid in a ball cup to a volume of the ball cup is set between 1/2 and 4/5.

By adopting the technical scheme, the conductive liquid can better contact with the electromagnetic component when the automobile is inclined or the acceleration value of the automobile is larger than or equal to the preset acceleration value, so that the sensitivity and the reliability of the safety belt retractor of the automobile are improved.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor for an automobile, in which the conductive liquid in the ball cup is set to mercury.

By adopting the technical scheme, the conductive liquid is set to have the advantages of strong conductivity and weak volatility, so that the problem that the conductive liquid needs to be frequently supplemented by the safety belt retractor of the automobile due to volatilization of the conductive liquid is avoided while the conductivity of the conductive liquid is ensured.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor of an automobile, an electromagnetic component including a solenoid assembly, a power source, and a short-circuit switch. The wiring terminals at two ends of the electromagnetic coil assembly are respectively connected with the positive electrode and the negative electrode of the power supply, so that the electromagnetic coil assembly and the power supply form an electromagnetic loop. The two ends of the short-circuit switch are respectively connected with the positive electrode and the negative electrode of the power supply, so that the short-circuit switch and the power supply form a short-circuit loop.

One side of the electromagnetic component, which is provided with the electromagnetic coil component, is close to the locking wheel, and one end of the magnetic elastic piece is fixedly connected to the electromagnetic coil component. One side of the electromagnetic component, which is provided with a short-circuit switch, is close to the spherical cup, and the short-circuit switch extends into the mounting hole of the spherical cup and can be in contact with the conductive liquid.

When the automobile does not incline and the acceleration value of the automobile is smaller than the preset acceleration value, the conductive liquid is not contacted with the short-circuit switch, the short-circuit switch is in an off state, and an electromagnetic loop in the electromagnetic component is electrified, so that the other end of the magnetic elastic piece is adsorbed on the electromagnetic coil assembly.

When the automobile is inclined or the acceleration value of the automobile is larger than or equal to the preset acceleration value, the conductive liquid is in contact with the short-circuit switch, the short-circuit switch is electrically conducted through the conductive liquid, a power supply in the electromagnetic component is short-circuited, and the other end of the magnetic elastic component returns to the position matched with the locking wheel for locking.

By adopting the technical scheme, when the conductive liquid is not contacted with the short-circuit switch, the electromagnetic circuit in the electromagnetic component is electrified, so that the electromagnetic coil component is electrified to generate magnetic force to adsorb the other end of the magnetic elastic piece, the magnetic elastic piece is separated from the locking wheel fixedly arranged on the winding device, and the winding device can rotate relative to the shell, so that a driver and a passenger can conveniently adjust the length of the safety belt.

When the conductive liquid is in contact with the short-circuit switch, the short-circuit switch is electrically connected through the conductive liquid, a power supply in the electromagnetic component is short-circuited, so that the electromagnetic coil component is powered off to lose magnetic force, the other end of the magnetic elastic piece loses adsorption force and returns to the position matched with the locking wheel for locking, the magnetic elastic piece plays a stop role on the locking wheel fixedly arranged on the winding device, the locking wheel is prevented from rotating, the winding device is further fixed relative to the shell, and when the automobile body of the automobile suddenly tilts or the automobile collides or emergently brakes, the safety belt can be locked by the safety belt retractor, and then a driver and an operator are fixed on a seat for protection.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor for an automobile, the electromagnetic component further comprising a resistor disposed on the electromagnetic circuit between the electromagnetic coil assembly and the power source.

By adopting the technical scheme, the resistor can play a role in dividing voltage on the electromagnetic coil assembly, so that the electromagnetic coil is prevented from being damaged due to overhigh voltage.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor of an automobile, an electromagnetic coil assembly including an electromagnet, a coil, and a support. The coil is wound on the periphery of the electromagnet, and the wiring terminals at two ends of the coil are respectively connected with the positive electrode and the negative electrode of the power supply.

The support piece is "L" shape, and includes bottom plate and connecting plate, and the electromagnet sets up on the bottom plate, and the one end of bottom plate is connected with the one end of connecting plate, and the other end of connecting plate extends along the direction of perpendicular to bottom plate, and with the one end fixed connection of magnetism elastic component to the other end of magnetism elastic component can adsorb the one end of keeping away from the bottom plate on the electromagnet.

By adopting the technical scheme, the arrangement mode can enable the structure of the electromagnetic component to be more compact, and further enable the occupied space of the electromagnetic locking device to be smaller.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor for an automobile, in which ratchet teeth are uniformly provided on a circumferential side of a locking wheel. The magnetic elastic piece is arranged as a spring piece, one end of the spring piece is fixedly connected to the electromagnetic component, and the other end of the spring piece is provided with a clamping part. And the clamping part can be matched with the ratchet, so that the other end of the elastic sheet can be locked with the locking wheel.

By adopting the technical scheme, the ratchet and the clamping part are arranged, so that the locking between the locking wheel and the elastic sheet is more reliable, and the locking reliability of the electromagnetic locking device is ensured.

According to another embodiment of the utility model, the embodiment of the utility model discloses a safety belt retractor of an automobile, wherein the retractor is provided as a rotating shaft, and the end part of the rotating shaft is rotatably connected in a shell. The safety belt is wound on the periphery of the rotating shaft, and the locking wheel is sleeved on and fixed on the periphery of the rotating shaft. And the liquid sensing device is fixedly arranged at a position parallel to the horizontal plane in the shell.

By adopting the technical scheme, the winding device is arranged as the rotating shaft, so that the structure of the winding device is simpler, and the structure of the safety belt retractor of the automobile is simpler. The liquid sensing device is fixedly arranged at the position parallel to the horizontal plane in the shell, so that the liquid in the liquid sensing device can accurately sense the inclination change of the automobile body, and the locking reliability of the safety belt retractor of the automobile is further improved.

An embodiment of the utility model also provides an automobile, comprising the safety belt retractor of any automobile.

By adopting the technical scheme, the locking or unlocking state of the electromagnetic locking device in the safety belt retractor of the automobile is controlled by contacting or not contacting with the liquid in the liquid sensing device, namely, the safety belt retractor of the automobile is not provided with a mechanism for driving a vehicle lever arm arranged on the steel ball to incline and cooperate with the locking wheel by the rotation of the steel ball so as to lock the safety belt in the prior art, so that the safety belt retractor of the automobile can avoid free shaking of the steel ball in the mechanism when the automobile runs on a bumpy road or is in other vibration working conditions, and further avoid noise generated by shaking of the steel ball. Therefore, the seatbelt retractor of the automobile according to the present utility model has an advantage that noise is not easily generated, and thus NVH (noise, vibration and harshness) performance of the automobile can be improved.

The beneficial effects of the utility model are as follows:

the utility model provides a safety belt retractor of an automobile, which comprises a shell, a winding device, an electromagnetic locking device and a liquid sensing device. The electromagnetic locking device comprises an electromagnetic component, a magnetic elastic piece and a locking wheel. The shell is used for protecting the winding device, the electromagnetic locking device and the liquid sensing device. The retractor is used for winding the seat belt. The liquid induction device can enable the other end of the magnetic elastic piece in the electromagnetic locking device to be adsorbed on the electromagnetic component according to the change of the acceleration of the automobile or the inclination state of the automobile, and separate from the locking wheel fixedly arranged on the winding device, so that the electromagnetic locking device is in an unlocking state, and further the winding device can rotate relative to the shell, and the length of the safety belt can be conveniently adjusted by drivers and passengers; or the other end of the magnetic elastic piece in the electromagnetic locking device returns to the position matched with the locking wheel for locking, so that the electromagnetic locking device is in a locking state, and the winding device is fixed relative to the shell, so that when the automobile body of the automobile suddenly tilts or the automobile collides or emergently brakes, the safety belt can be locked by the safety belt retractor, and a driver and passengers are fixed on a seat for protection. In addition, the locking or unlocking state of the electromagnetic locking device is controlled by contacting or not contacting with liquid in the liquid sensing device, compared with a mechanism in the prior art that a vehicle lever arm arranged on a steel ball is driven to incline by rotation of the steel ball and is matched with a locking wheel so as to lock a safety belt, the safety belt retractor of the automobile is not provided with the steel ball, so that the safety belt retractor of the automobile can avoid free shaking of the steel ball in the mechanism when the automobile runs on a bumpy road or is in other vibration working conditions, and further noise generated by shaking of the steel ball is avoided. Therefore, the seatbelt retractor of the automobile of the present utility model has an advantage that noise is not easily generated.

Additional features and corresponding advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic locking device and a liquid sensing device of a seatbelt retractor of an automobile according to embodiment 1 of the present utility model in an unlocked state;

fig. 2 is a schematic structural diagram of an electromagnetic locking device and a liquid sensing device of a seatbelt retractor of an automobile according to embodiment 1 of the present utility model in a locked state;

fig. 3 is a schematic structural view of an electromagnetic component of a seatbelt retractor of an automobile according to embodiment 1 of the present utility model.

Reference numerals illustrate:

10: electromagnetic locking device;

110: an electromagnetic component;

111: an electromagnetic coil assembly; 1111: an electromagnet; 1112: a coil; 1113: a support; 1113a: a bottom plate; 1113b: a connecting plate;

112: a power supply;

113: a short-circuit switch;

114: a resistor;

120: a magnetic elastic member; 121: a clamping part;

130: a locking wheel; 131: a ratchet;

20: a liquid sensing device;

210: a spherical cup; 211: a mounting hole;

220: conductive liquid.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Example 1

The present embodiment provides a seatbelt retractor of an automobile, as shown in fig. 1 and 2, including a housing (not shown), a retractor (not shown), an electromagnetic locking device 10, and a liquid sensing device 20. The winding device, the electromagnetic locking device 10 and the liquid sensing device 20 are all arranged in the shell, and the winding device can rotate relative to the shell. The seat belt of the vehicle is wound around the retractor with at least one end of the seat belt being located outside the housing. Specifically, the housing is used for protecting the winding device, the electromagnetic locking device 10 and the liquid sensing device 20. And, one side of the casing is provided with a through slot adapted to the seat belt, through which at least one end of the seat belt extends to the outside of the casing, so that a driver can adjust the length of the seat belt by pulling at least one end of the seat belt. The housing includes a housing body and a housing cover, which are detachably connected to each other, so that the winding device, the electromagnetic locking device 10, and the liquid sensing device 20 are installed in the housing. And the detachable connection mode between the shell body and the shell cover comprises screw connection, clamping connection and the like, and the detachable connection mode can be specifically designed according to actual design. In addition, the winding device may specifically be a pulley, a rotating shaft or other structures capable of winding the safety belt, and preferably, in order to reduce the space occupied by the winding device and make the structure of the winding device simpler, the winding device in this embodiment is set to the rotating shaft.

The electromagnetic locking device 10 is disposed above the liquid sensing device 20 and can be in contact with or not in contact with the liquid in the liquid sensing device 20, so that the electromagnetic locking device 10 is switched between a locked state and an unlocked state, so that the winding device is fixed or rotatable relative to the housing. Specifically, the electromagnetic locking device 10 includes an electromagnetic member 110, a magneto-elastic element 120, and a locking wheel 130. The locking wheel 130 is fixedly connected to the retractor. One end of the magnetic elastic member 120 is fixedly connected to the electromagnetic member 110, and the other end can be adsorbed on the electromagnetic member 110 or locked in cooperation with the locking wheel 130. The electromagnetic member 110 may be fixedly connected to the inside of the housing by means of a snap-fit connection, a screw-fit connection, or the like.

As shown in fig. 1, when the automobile is not inclined and the acceleration value of the automobile is smaller than the preset acceleration value, the liquid in the liquid sensing device 20 does not contact the electromagnetic component 110 of the electromagnetic locking device 10, and the electromagnetic component 110 is in an energized state, so that the other end of the magnetic elastic member 120 is adsorbed on the electromagnetic component 110 under the action of magnetic attraction and separated from the locking wheel 130, so that the electromagnetic locking device 10 is in an unlocked state, and further, the winding device can rotate relative to the housing, so that a driver can adjust the length of the safety belt conveniently.

As shown in fig. 2, when the automobile is inclined, or the acceleration value of the automobile is greater than or equal to the preset acceleration value, the liquid level of the liquid in the liquid sensing device 20 is inclined, so that the liquid in the liquid sensing device 20 contacts the electromagnetic component 110 of the electromagnetic locking device 10, and further the electromagnetic component 110 is in a power-off state, the other end of the magnetic elastic member 120 loses the magnetic attraction and returns to the position where the magnetic elastic member is locked with the locking wheel 130, so that the electromagnetic locking device 10 is in a locking state, and further the winding device is fixed relative to the shell, and when the automobile body of the automobile suddenly inclines, or the automobile collides or brakes emergently, the safety belt can be locked by the safety belt retractor, and further a driver and a passenger are fixed on the seat for protection. In addition, the locking or unlocking state of the electromagnetic locking device 10 is controlled by contacting or not contacting the liquid in the liquid sensing device 20, compared with the mechanism in the prior art that the steel ball rotates to drive the arm of the vehicle arranged on the steel ball to incline and cooperate with the locking wheel 130 so as to lock the safety belt, the safety belt retractor of the automobile is not provided with the steel ball, so that the safety belt retractor of the automobile can avoid free shaking of the steel ball in the mechanism when the automobile runs on a bumpy road or is in other vibration working conditions, and further avoid noise generated by shaking of the steel ball. Therefore, the seatbelt retractor of the automobile of the present utility model has an advantage that noise is not easily generated. It should be noted that the preset acceleration values may be specifically set to 6m/s2, 7m/s2, 7.5m/s2, 8m/s2, and the like, which may be specifically set according to the actual acceleration value when the automobile collides or brakes emergently, which is not specifically limited in this embodiment.

In addition, since the electromagnetic locking device 10 is switched between the locking state and the unlocking state by contacting or not contacting the liquid in the liquid sensing device 20, and the position state of the liquid in the liquid sensing device 20 is changed according to the change of the acceleration of the automobile or the change of the inclination state of the automobile, when the automobile body of the automobile suddenly inclines or the automobile collides or suddenly brakes, the position of the liquid in the liquid sensing device 20 is changed at the same time, so that the electromagnetic locking device 10 is in the locking state rapidly and timely, and then the driver and the passenger are fixed on the seat rapidly and timely for protection. The seatbelt retractor of the automobile has the advantage of high safety.

Further, in the seatbelt retractor of the automobile disclosed in the embodiment of the present utility model, as shown in fig. 1 and 2, the liquid sensing device 20 includes a ball cup 210 and a conductive liquid 220 provided in the ball cup 210. Wherein, the spherical cup 210 is provided with a mounting hole 211 at a position closest to the electromagnetic component 110, the spherical cup 210 is connected to the electromagnetic component 110 through the mounting hole 211, and the electromagnetic component 110 extends into the mounting hole 211 and can be contacted with the conductive liquid 220. Specifically, the electromagnetic member 110 and the mounting hole 211 may be connected by clamping, riveting, or the like, which is not particularly limited in this embodiment.

Also, as shown in fig. 1, when the vehicle is not tilted and the acceleration value of the vehicle is less than the preset acceleration value, the conductive liquid 220 is not in contact with the electromagnetic member 110. As shown in fig. 2, when the vehicle is tilted or the acceleration value of the vehicle is greater than or equal to a preset acceleration value, the conductive liquid 220 is in contact with the electromagnetic component 110.

It should be noted that, when the automobile collides or suddenly brakes, that is, the acceleration value of the automobile is greater than or equal to the preset acceleration value, the speed of the automobile is rapidly reduced in a short time, and the liquid surface of the conductive liquid 220 in the spherical cup 210 is inclined due to inertia, so that the liquid surface of the conductive liquid 220 contacts with the portion of the electromagnetic member 110 extending into the mounting hole 211. When the body of the automobile is inclined in any direction, the liquid surface of the conductive liquid 220 in the spherical cup 210 can be inclined along with the inclination direction of the body, so that the liquid surface of the conductive liquid 220 can also be in contact with the part of the electromagnetic member 110 extending into the mounting hole 211. After the liquid level of the conductive liquid 220 contacts with the electromagnetic component 110, the electromagnetic component 110 is in a power-off state, the other end of the magnetic elastic piece 120 returns to a position matched with the locking wheel 130 for locking, so that the electromagnetic locking device 10 is in a locking state, and when the automobile collides or suddenly brakes, or the automobile body suddenly tilts in any direction, the safety belt can be locked by the safety belt retractor, and thus a driver and a passenger are fixed on a seat for protection. And, compared with other shapes, the arrangement of the spherical cup 210 enables the conductive liquid 220 to flow in the spherical cup 210 along with the inclination direction of the vehicle body better, so that the locking process of the electromagnetic locking device 10 is more sensitive, and the safety belt retractor of the automobile is more reliable.

Further, in the seatbelt retractor of an automobile disclosed in the embodiment of the present utility model, as shown in fig. 1 and 2, the ratio of the conductive liquid 220 in the ball cup 210 to the volume of the ball cup 210 is set to be between 1/2 and 4/5. And, the ratio of the conductive liquid 220 in the spherical cup 210 to the volume of the spherical cup 210 may be 1/2, 2/3, 4/5, etc. in particular, so as to ensure that the conductive liquid 220 in the spherical cup 210 can contact with the portion of the electromagnetic member 110 extending into the mounting hole 211 when the vehicle is tilted or the acceleration value of the vehicle is greater than or equal to the preset acceleration value, thereby improving the sensitivity and reliability of the seatbelt retractor of the vehicle.

Further, in the seatbelt retractor of the automobile disclosed in the embodiment of the present utility model, as shown in fig. 1 and 2, the conductive liquid 220 in the spherical cup 210 is provided as mercury. It should be noted that, the conductive liquid 220 has the advantage of strong conductivity and weak volatility, so as to avoid the problem that the conductive liquid 220 needs to be frequently replenished for the seatbelt retractor of the automobile due to volatilization of the conductive liquid 220 while ensuring conductivity of the conductive liquid 220.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor of an automobile, as shown in fig. 3, an electromagnetic part 110 includes an electromagnetic coil assembly 111, a power source 112, and a short-circuit switch 113. The terminals at two ends of the electromagnetic coil assembly 111 are respectively connected with the positive electrode and the negative electrode of the power supply 112, so that the electromagnetic coil assembly 111 and the power supply 112 form an electromagnetic loop. Both ends of the short-circuit switch 113 are also connected to the positive and negative poles of the power supply 112, respectively, so that the short-circuit switch 113 forms a short-circuit loop with the power supply 112.

As shown in fig. 1 and 3, one side of the electromagnetic component 110, on which the electromagnetic coil assembly 111 is disposed, is close to the locking wheel 130, and one end of the magnetic elastic member 120 is fixedly connected to the electromagnetic coil assembly 111. The side of the electromagnetic member 110 on which the shorting switch 113 is provided is close to the spherical cup 210, and the shorting switch 113 extends into the mounting hole 211 of the spherical cup 210 and is capable of contacting the conductive liquid 220.

As shown in fig. 1 and 3, when the automobile is not inclined and the acceleration value of the automobile is smaller than the preset acceleration value, the conductive liquid 220 is not in contact with the short-circuit switch 113, the short-circuit switch 113 is in an off state, the electromagnetic circuit in the electromagnetic component 110 is electrified, so that the electromagnetic coil assembly 111 generates magnetic force to attract the other end of the magnetic elastic member 120, the magnetic elastic member 120 is separated from the locking wheel 130 fixedly arranged on the winding device, and the winding device can rotate relative to the shell, so that a driver can conveniently adjust the length of the safety belt.

As shown in fig. 2 and 3, when the automobile tilts or the acceleration value of the automobile is greater than or equal to the preset acceleration value, the conductive liquid 220 contacts the short-circuit switch 113, the short-circuit switch 113 is electrically connected through the conductive liquid 220, the power supply 112 in the electromagnetic component 110 is short-circuited, the electromagnetic coil assembly 111 is powered off and loses magnetic force, the other end of the magnetic elastic piece 120 loses adsorption force and returns to the position where the magnetic elastic piece is locked with the locking wheel 130, so that the magnetic elastic piece 120 plays a role in stopping the locking wheel 130 fixedly arranged on the retractor device, the locking wheel 130 is prevented from rotating, the retractor device is further fixed relative to the shell, and when the automobile body of the automobile suddenly tilts or the automobile collides or brakes suddenly, the safety belt can be locked by the safety belt retractor, and a driver and a passenger are further fixed on the seat for protection.

Further, in the seatbelt retractor of the automobile disclosed in the embodiment of the present utility model, as shown in fig. 3, the electromagnetic component 110 further includes a resistor 114, and the resistor 114 is disposed on the electromagnetic circuit and between the electromagnetic coil assembly 111 and the power source 112. It should be noted that, the resistor 114 can be configured to perform a voltage division function on the electromagnetic coil assembly 111, so as to avoid damage to the electromagnetic coil 1112 caused by excessive voltage.

Further, in the seatbelt retractor of the automobile disclosed in the embodiment of the present utility model, as shown in fig. 3, the electromagnetic coil assembly 111 includes an electromagnet 1111, a coil 1112, and a support 1113. The coil 1112 is wound around the outer periphery of the electromagnet 1111, and terminals at both ends of the coil 1112 are connected to the positive and negative electrodes of the power source 112, respectively.

The supporting member 1113 is "L" shaped and includes a bottom plate 1113a and a connection plate 1113b, the electromagnet 1111 is disposed on the bottom plate 1113a, one end of the bottom plate 1113a is connected with one end of the connection plate 1113b, the other end of the connection plate 1113b extends along a direction perpendicular to the bottom plate 1113a and is fixedly connected with one end of the magnetic elastic member 120, and the other end of the magnetic elastic member 120 can be adsorbed on the electromagnet 1111 at an end far away from the bottom plate 1113 a. Specifically, the electromagnet 1111 and the bottom plate 1113a, the bottom plate 1113a and the connecting plate 1113b, and the connecting plate 1113b and the magnetic elastic member 120 may be connected by screwing, clamping, riveting, or the like, and the bottom plate 1113a and the connecting plate 1113b may also be integrally formed, which may be specifically set according to practical situations, and the embodiment is not limited thereto specifically. Moreover, the arrangement mode can enable the structural arrangement of the electromagnetic component 110 to be more compact, and further enable the occupied space of the electromagnetic locking device 10 to be smaller.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses a seatbelt retractor of an automobile, as shown in fig. 1 and 2, the locking wheel 130 is uniformly provided with ratchet teeth 131 at the circumferential side thereof. The magnetic elastic member 120 is configured as a spring, one end of the spring is fixedly connected to the electromagnetic component 110, and the other end of the spring is provided with a clamping portion 121. The engaging portion 121 can be engaged with the ratchet 131, so that the other end of the spring piece can be locked with the locking wheel 130. The engaging portion 121 may be specifically provided in a barb-like structure, a triangular structure, or the like that is adapted to the ratchet 131, which is capable of engaging the ratchet 131, and may be specifically set according to actual settings, which is not specifically limited in this embodiment. And, the setting of ratchet 131 and joint portion 121 makes the locking between locking wheel 130 and the shell fragment more reliable to guarantee the reliability of electromagnetic lock device 10 locking.

According to another embodiment of the utility model, the embodiment of the utility model discloses a safety belt retractor of an automobile, wherein the retractor is provided as a rotating shaft, and the end part of the rotating shaft is rotatably connected in a shell. The seat belt is wound around the outer circumference of the rotating shaft, and the locking wheel 130 of fig. 1 and 2 is sleeved and fixed to the outer circumference of the rotating shaft. Specifically, the position department that corresponds with pivot both ends in the casing is provided with the connecting hole, and the both ends of pivot are pegged graft in the connecting hole in the casing, and the pivot can rotate for the connecting hole along its axis. The rotating shaft and the shell can be connected through other rotating connection structures. The seat belt and the lock wheel 130 are provided on the outer periphery of the rotating shaft with a gap therebetween, and a gap is also provided between the peripheral side of the lock wheel 130 and the inner wall surface of the housing to avoid interference of the housing with respect to the lock wheel 130. And, the locking wheel 130 may be fixedly coupled to the outer circumference of the rotation shaft by a key, a clip, or the like. It should be noted that, compare in structures such as band pulley, the retractor sets up to the pivot and makes its structure simpler, and then makes the structure of this car's safety belt retractor simpler.

In addition, the liquid sensing device 20 in fig. 1 and 2 is fixedly arranged at a position parallel to the horizontal plane in the shell, so that the liquid in the liquid sensing device 20 can accurately sense the inclination change of the automobile body, and the locking reliability of the safety belt retractor of the automobile is further improved. In particular, a mounting portion that fits the spherical cup 210 of the liquid sensing device 20 may be provided in the side surface parallel to the horizontal plane in the housing, and the spherical cup 210 is mounted on the mounting portion such that the liquid sensing device 20 is fixedly provided in the housing in a position parallel to the horizontal plane. Also, the mounting portion may be provided as a hemispherical or spherical recess for catching a portion of the spherical cup 210 remote from the mounting hole 211; the mounting portion may also be configured as a bolt hole, and a portion of the spherical cup 210 away from the mounting hole 211 is provided with a base, and a position of the base adapted to the bolt hole is provided with a through hole, through which a bolt is screwed to the bolt hole, so that the spherical cup 210 is screwed to a position parallel to the horizontal plane in the housing. The mounting portion may also be provided in other structures, which may be specifically set according to actual design and use requirements, which is not specifically limited in this embodiment.

The working process of the safety belt retractor of the automobile is as follows: as shown in fig. 1 and 3, when the automobile is not inclined and the acceleration value of the automobile is less than the preset acceleration value, the liquid level of the conductive liquid 220 in the spherical cup 210 is substantially in a horizontal state, so that the conductive liquid 220 does not contact the short-circuit switch 113 of the electromagnetic component 110 inserted through the mounting hole 211 and extending into the spherical cup 210, at this time, the short-circuit switch 113 is in an off state, and the electromagnetic circuit in the electromagnetic component 110 is energized, so that the electromagnetic coil assembly 111 is energized to generate magnetic force to absorb the other end of the magneto-elastic element 120, so that the magneto-elastic element 120 is separated from the locking wheel 130 fixedly arranged on the retractor, and further the retractor can rotate relative to the housing, so that a driver can adjust the length of the safety belt.

As shown in fig. 2 and 3, when the vehicle is tilted, or the acceleration value of the vehicle is greater than or equal to the preset acceleration value, the liquid level of the conductive liquid 220 in the spherical cup 210 is tilted along with the tilting direction of the vehicle body, or is tilted due to inertia, so that the conductive liquid 220 contacts the short-circuit switch 113 of the electromagnetic component 110 inserted through the mounting hole 211 and extended into the spherical cup 210, and further, the short-circuit switch 113 is electrically connected through the conductive liquid 220. At this time, the power supply 112 in the electromagnetic component 110 is shorted, so that the electromagnetic coil assembly 111 is powered off to lose magnetic force, the other end of the magnetic elastic member 120 loses adsorption force to return to the position where the magnetic elastic member is locked with the locking wheel 130, so that the magnetic elastic member 120 plays a role of stopping the locking wheel 130 fixedly arranged on the retractor, the locking wheel 130 is prevented from rotating, the retractor is further fixed relative to the housing, and when the automobile body of the automobile suddenly tilts or the automobile collides or brakes emergently, the safety belt can be locked by the safety belt retractor, and then a driver and a passenger are fixed on the seat to be protected.

Example 2

The present embodiment provides an automobile, as shown in fig. 1 to 3, including the seatbelt retractor of any one of the automobiles of embodiment 1. Specifically, this car's safety belt retractor sets up in car seat's one side, and car seat's one side corresponding position department can set up the recess with the casing adaptation of safety belt retractor for inlay the safety belt retractor in this recess through modes such as joint, bonding, spiro union, with the safety belt retractor embeds in the plaque of car seat one side, and then improves the interior aesthetic property of car. The outer side of the shell of the safety belt retractor can be directly connected to the decorative plate on one side of the automobile seat in a threaded connection, clamping connection and other modes, so that a driver and a passenger can find the safety belt retractor conveniently. It may be specifically set according to actual design and use requirements, which is not specifically limited in this embodiment.

It should be noted that, the locking or unlocking state of the electromagnetic locking device 10 in the safety belt retractor of the automobile is controlled by contacting or not contacting with the liquid in the liquid sensing device 20, that is, the safety belt retractor of the automobile is not provided with a mechanism for driving the arm of the automobile arranged on the steel ball to incline and cooperate with the locking wheel 130 by the rotation of the steel ball so as to lock the safety belt in the prior art, so that the safety belt retractor of the automobile in the utility model can avoid free shaking of the steel ball in the mechanism when the automobile runs on a bumpy road or is in other vibration working conditions, and further avoid noise generated by shaking of the steel ball. Therefore, the seatbelt retractor of the automobile according to the present utility model has an advantage that noise is not easily generated, and thus NVH (noise, vibration and harshness) performance of the automobile can be improved.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (11)

1. The safety belt retractor of the automobile is characterized by comprising a shell, a winding device, an electromagnetic locking device and a liquid sensing device; the rolling device, the electromagnetic locking device and the liquid sensing device are arranged in the shell, and the rolling device can rotate relative to the shell;

a seat belt of an automobile is wound on the winding device, and at least one end of the seat belt is positioned outside the shell;

the electromagnetic locking device is arranged above the liquid sensing device and can be in contact with or not in contact with liquid in the liquid sensing device, so that the electromagnetic locking device is switched between a locking state and an unlocking state; and is also provided with

When the automobile is not inclined and the acceleration value of the automobile is smaller than a preset acceleration value, the liquid in the liquid sensing device is not contacted with the electromagnetic locking device, and the electromagnetic locking device is in the unlocking state, so that the rolling device can rotate relative to the shell;

when the automobile is inclined or the acceleration value of the automobile is larger than or equal to a preset acceleration value, the liquid in the liquid sensing device contacts the electromagnetic locking device, and the electromagnetic locking device is in the locking state, so that the rolling device is fixed relative to the shell.

2. The automotive seatbelt retractor of claim 1, wherein the electromagnetic locking device comprises an electromagnetic member, a magnetic elastic member, and a locking wheel; the locking wheel is fixedly connected to the winding device;

one end of the magnetic elastic piece is fixedly connected to the electromagnetic component, and the other end of the magnetic elastic piece can be adsorbed on the electromagnetic component or locked with the locking wheel in a matched manner; and is also provided with

When the liquid in the liquid sensing device does not contact the electromagnetic component of the electromagnetic locking device, the electromagnetic component is in an electrified state, so that the other end of the magnetic elastic piece is adsorbed on the electromagnetic component and separated from the locking wheel, and the electromagnetic locking device is in the unlocking state;

When the liquid in the liquid sensing device contacts the electromagnetic component of the electromagnetic locking device, the electromagnetic component is in a power-off state, and the other end of the magnetic elastic piece returns to a position matched with the locking wheel for locking, so that the electromagnetic locking device is in the locking state.

3. The automotive seatbelt retractor of claim 2, wherein the liquid sensing device comprises a spherical cup and a conductive liquid disposed within the spherical cup; wherein the method comprises the steps of

The spherical cup is connected to the electromagnetic component through the mounting hole, and the electromagnetic component extends into the mounting hole and can be in contact with the conductive liquid; and is also provided with

When the automobile is not inclined and the acceleration value of the automobile is smaller than a preset acceleration value, the conductive liquid is not in contact with the electromagnetic component;

when the automobile is inclined or the acceleration value of the automobile is larger than or equal to a preset acceleration value, the conductive liquid is in contact with the electromagnetic component.

4. A seatbelt retractor for a vehicle according to claim 3, wherein a ratio of the conductive liquid in the spherical cup to a volume of the spherical cup is set in a range of 1/2 to 4/5.

5. A seatbelt retractor for an automobile according to claim 3, wherein the conductive liquid in the spherical cup is provided as mercury.

6. The automotive seatbelt retractor of claim 3, wherein the electromagnetic component comprises a solenoid assembly, a power source, and a shorting switch; wherein the method comprises the steps of

The wiring terminals at two ends of the electromagnetic coil assembly are respectively connected with the positive electrode and the negative electrode of the power supply, so that an electromagnetic loop is formed between the electromagnetic coil assembly and the power supply;

the two ends of the short-circuit switch are also respectively connected with the positive electrode and the negative electrode of the power supply, so that a short-circuit loop is formed between the short-circuit switch and the power supply;

one side of the electromagnetic component, on which the electromagnetic coil assembly is arranged, is close to the locking wheel, and one end of the magnetic elastic piece is fixedly connected to the electromagnetic coil assembly;

the side of the electromagnetic component, on which the short-circuit switch is arranged, is close to the spherical cup, and the short-circuit switch extends into the mounting hole of the spherical cup and can be in contact with the conductive liquid;

when the automobile is not inclined and the acceleration value of the automobile is smaller than a preset acceleration value, the conductive liquid is not in contact with the short-circuit switch, the short-circuit switch is in an off state, and the electromagnetic circuit in the electromagnetic component is electrified, so that the other end of the magnetic elastic piece is adsorbed on the electromagnetic coil assembly;

When the automobile is inclined or the acceleration value of the automobile is larger than or equal to a preset acceleration value, the conductive liquid is in contact with the short-circuit switch, the short-circuit switch is electrically conducted through the conductive liquid, the power supply in the electromagnetic component is short-circuited, and the other end of the magnetic elastic piece returns to the position where the magnetic elastic piece is matched with the locking wheel for locking.

7. The automotive seatbelt retractor of claim 6, wherein the electromagnetic component further comprises a resistor disposed on the electromagnetic circuit between the electromagnetic coil assembly and the power source.

8. The automotive seatbelt retractor of claim 6, wherein the electromagnetic coil assembly comprises an electromagnet, a coil, and a support, wherein

The coil is wound on the periphery of the electromagnet, and the wiring terminals at two ends of the coil are respectively connected with the positive electrode and the negative electrode of the power supply;

the support piece is L-shaped and comprises a bottom plate and a connecting plate, the electromagnet is arranged on the bottom plate, one end of the bottom plate is connected with one end of the connecting plate, the other end of the connecting plate extends along the direction perpendicular to the bottom plate and is fixedly connected with one end of the magnetic elastic piece, and the other end of the magnetic elastic piece can be adsorbed on the electromagnet and is far away from one end of the bottom plate.

9. The seatbelt retractor of an automobile according to any one of claims 2 to 8, wherein ratchet teeth are uniformly provided on a circumferential side of the locking wheel; the magnetic elastic piece is arranged as a spring piece, one end of the spring piece is fixedly connected to the electromagnetic component, and the other end of the spring piece is provided with a clamping part; and is also provided with

The clamping part can be matched with the ratchet, so that the other end of the elastic sheet can be locked with the locking wheel.

10. The seatbelt retractor of claim 9, wherein the retractor is provided as a rotary shaft, and an end of the rotary shaft is rotatably connected in the housing;

the safety belt is wound on the periphery of the rotating shaft, and the locking wheel is sleeved on and fixed on the periphery of the rotating shaft; and is also provided with

The liquid sensing device is fixedly arranged at a position parallel to the horizontal plane in the shell.

11. An automobile comprising the seatbelt retractor of an automobile according to any one of claims 1 to 10.

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