CN213398931U

CN213398931U - Mechanical type occupies position and discerns sensor

Info

Publication number: CN213398931U
Application number: CN202022324198.2U
Authority: CN
Inventors: 曹晶; 白丽; 张海波; 王健; 李雨龙
Original assignee: FAW Bestune Car Co Ltd
Current assignee: FAW Bestune Car Co Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-06-08
Anticipated expiration: 2030-10-19

Abstract

The utility model relates to a mechanical occupying identification sensor, which comprises a sensor body, wherein the sensor body is fixed between a steel wire mesh curtain of a seat and the seat foaming through a bracket, and comprises an upper sensor shell and a lower sensor shell which is connected with the upper sensor shell in a clamping way; the upper shell of the sensor is arranged below the seat foam, a spring body, a PCB (printed circuit board), a trigger and a built-in spring are arranged in the upper shell of the sensor, the lower shell of the sensor is fixed on the bracket, and a connector integrally formed with the lower shell of the sensor is arranged below the lower shell of the sensor. The mechanical occupancy identification sensor of the utility model is beneficial to the universal design of the occupancy sensor of the automobile seat, the pressure detection area is increased by about 50 percent compared with the diaphragm sensor, and the service life and the reliability are better; the cost is superior to that of a diaphragm sensor; the generalization degree is high; the pressure detection area is large and the reliability is high.

Description

Mechanical type occupies position and discerns sensor

Technical Field

The utility model belongs to the technical field of automobile parts, concretely relates to mechanical type car seat occupies discernment sensor.

Background

With the development of automobile technology at home and abroad, automobile owners and passive safety devices are receiving wide attention. The logical judgment required by the unbelted reminding system and the air bag unfolding control is provided by the automobile seat occupancy sensor. Since most of the current automotive applications are membrane sensors installed between the seat skin and the foam, the shape of the sensor is necessarily limited by the shape of the seat surface, and even some functions of the sensor are limited. Meanwhile, in order to meet the requirements of multifunction and comfort of the seat, the functions of seat heating and seat ventilation are gradually popularized, and the existence of a seat heating pad and ventilation foam also increases the difficulty in type selection and arrangement of the diaphragm sensor.

The prior art discloses a diaphragm sensor, which is a laminated sensing diaphragm, which is composed of an upper layer of sheet, a lower layer of sheet and a middle bonding layer, and conductive circuits and sensing units are printed on the upper layer of sheet and the lower layer of sheet. When the seat surface is loaded, the sensing unit is activated after being stressed. All activated sensing units in the sensing region will form a circuit loop, and the resistance of the whole loop corresponds to the load applied to the seat. And the judgment of the occupant occupation information can be realized by comparing the loop resistance value with resistance value thresholds of the SBR activated state and the SBR inactivated state.

However, the above sensor is limited by the shape of the seat surface and the function of the sensor is limited.

Disclosure of Invention

An object of the utility model is to provide an install the mechanical type sensor between the foaming of seatpad and the steel wire net curtain that supports the foaming to effectively solve the problem that diaphragm formula sensor receives the restriction of seat surface molding.

The utility model aims at realizing through the following technical scheme:

a mechanical occupancy recognition sensor comprises a sensor body and a bracket 2;

the sensor body is fixed between a steel wire mesh curtain 9 and seat foaming 10 of the seat through a bracket 2;

the sensor body comprises an upper sensor shell 1 and a lower sensor shell 4 clamped with the upper sensor shell;

the sensor upper shell 1 is arranged below the seat foam 10, and a spring body 3, a PCB6, a trigger 7 and an internal spring 8 are arranged in the sensor upper shell; the spring body 3 is nested in the middle of the upper sensor shell 1, the built-in spring 8 is arranged in the middle of the upper sensor shell 1, the trigger 7 is arranged below the built-in spring 8, the upper end of the trigger 7 penetrates through the built-in spring 8 to be fixed with the upper sensor shell 1, and the PCB6 is arranged below the trigger 7 and fixed with the lower sensor shell 4;

the lower sensor housing 4 is fixed on the bracket 2, and a connector 5 is arranged below the lower sensor housing.

Furthermore, a groove is formed in the inner side wall of the upper shell 1 of the sensor, and a protrusion matched with the groove is formed in the outer side wall of the lower shell 4 of the sensor.

Furthermore, a positioning groove is arranged in the upper shell 1 of the sensor.

Furthermore, the upper end of the trigger 7 is provided with an anti-dropping lock pin which passes through the built-in spring 8 to be matched with the inner positioning groove of the upper shell 1 of the sensor.

Further, a positioning groove is arranged in the sensor lower shell 4.

Further, the PCB board 6 is fixed in the positioning groove of the sensor lower case 4 by riveting.

Further, the sensor lower housing 4 is clamped with the bracket 2.

Further, the connector 5 is integrally injection-molded with the sensor lower case 4.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the mechanical occupancy identification sensor of the utility model is beneficial to the universal design of the occupancy sensor of the automobile seat, the pressure detection area is increased by about 50 percent compared with the diaphragm sensor, and the service life and the reliability are better;

2. the cost of the mechanical occupation identification sensor of the utility model is superior to that of a diaphragm sensor;

3. the generalization degree is high;

4. the pressure detection area is large and the reliability is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an isometric view of the mechanical occupancy sensor of the present invention;

fig. 2 is a front view of the mechanical occupancy sensor of the present invention;

fig. 3 is the utility model discloses mechanical type occupies place identification sensor's working process schematic diagram.

In the figure, 1, a sensor upper shell 2, a bracket 3, a spring body 4, a sensor lower shell 5, a connector 6, a PCB 7, a trigger 8, an internal spring 9, a steel wire mesh curtain 10 and a seat are foamed.

Detailed Description

The invention will be further described with reference to the following examples:

the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-3, the mechanical occupancy sensor of the present invention mainly comprises a sensor body, a connector 5 and a bracket 2. The bracket 2 fixes the sensor body between the steel wire mesh 9 of the seat and the seat foam 10.

The sensor body comprises an upper sensor shell 1 and a lower sensor shell 4 clamped with the upper sensor shell. The sensor is characterized in that a groove is formed in the inner side wall of the upper shell 1 of the sensor, and a protrusion matched with the outer side wall of the lower shell 4 of the sensor is arranged on the outer side wall of the lower shell of the sensor.

The sensor upper shell 1 is arranged below the seat foaming 10, and a spring body 3, a PCB6, a trigger 7 and an internal spring 8 are arranged in the sensor upper shell.

The spring body 3 is nested in the middle of the upper shell 1 of the sensor, so that the trigger 7 is prevented from freely descending in a no-load state and generating a false alarm signal after being communicated with the PCB 6. The built-in spring 8 is arranged in the middle of the upper sensor shell 1, a trigger 7 is arranged below the built-in spring, and the trigger 7 is limited in the lower sensor shell 4. The upper end of the trigger 7 penetrates through the built-in spring 8 to be fixed with the upper sensor shell 1, and the PCB6 is arranged below the trigger 7 and fixed with the lower sensor shell 4.

Specifically, the method comprises the following steps: and a positioning groove is arranged in the sensor upper shell 1. The upper end of the trigger 7 is provided with an anti-falling lock pin which is integrally formed with the trigger, and the anti-falling lock pin penetrates through the built-in spring 8 to be matched with the inner positioning groove of the upper shell 1 of the sensor.

Specifically, the method comprises the following steps: and a positioning groove is arranged in the lower shell 4 of the sensor. And the PCB6 is fixed in a positioning groove of the lower sensor shell 4 in a riveting mode.

The lower shell 4 of the sensor is clamped on the bracket 2, and a connector 5 is arranged below the lower shell. The connector 5 and the lower sensor shell 4 are integrally formed by injection molding.

The spring body 3 transmits load, and the trigger 7 and the PCB6 form a corresponding circuit loop according to the load condition. External load passes through on the sensor casing 1, the spring body 3 transmits to trigger 7 and PCB board 6 and forms corresponding circuit return circuit, through judging return circuit resistance range, discerns the seat occupation condition.

The working process is as follows:

when a sufficiently large load is applied to the seat foam 10, deformation is generated, pressure is transmitted to the upper shell 1 of the sensor, the spring body 3 contracts after being subjected to the pressure, meanwhile, the trigger 7 descends and is in contact with a contact on the PCB6, a closed circuit is formed by the circuit, and the connector 5 outputs a corresponding resistance value (a seat occupation signal);

when the load on the seat foam 10 is removed, the spring body 3 returns to a normal state, the upper shell 1 and the trigger 7 of the sensor rise, the contact points of the trigger 7 and the PCB6 are disconnected, no closed circuit is formed, and the connector 5 outputs a corresponding resistance value (a seat non-occupation signal).

Through judging the return circuit resistance range, the occupation situation of seat is discerned.

The mechanical occupation identification sensor has the advantages of large pressure detection range, good reliability and long service life of parts; meanwhile, the sensor is different from the arrangement mode of the diaphragm type sensor, the sensor is arranged between the seat foaming and the steel wire mesh curtain through the mounting bracket, the problem that the diaphragm type sensor is limited by the surface modeling of the seat is solved, and the universal application of the seat occupation sensor is facilitated.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A mechanical occupancy-identification sensor, characterized in that: comprises a sensor body and a bracket (2);

the sensor body is fixed between a steel wire mesh curtain (9) of the seat and seat foaming (10) through a bracket (2);

the sensor body comprises an upper sensor shell (1) and a lower sensor shell (4) clamped with the upper sensor shell;

the sensor upper shell (1) is arranged below the seat foam (10), and a spring body (3), a PCB (printed circuit board) (6), a trigger (7) and an internal spring (8) are arranged in the sensor upper shell; the spring body (3) is nested in the middle of the upper sensor shell (1), the built-in spring (8) is arranged in the middle of the upper sensor shell (1), a trigger (7) is arranged below the spring body, the upper end of the trigger (7) penetrates through the built-in spring (8) to be fixed with the upper sensor shell (1), and the PCB (6) is arranged below the trigger (7) to be fixed with the lower sensor shell (4);

the lower shell (4) of the sensor is fixed on the bracket (2), and a connector (5) is arranged below the lower shell.

2. The mechanical occupancy recognition sensor of claim 1, wherein: the sensor is characterized in that a groove is formed in the inner side wall of the upper shell (1) of the sensor, and a protrusion matched with the outer side wall of the lower shell (4) of the sensor is arranged on the outer side wall of the upper shell of the sensor.

3. The mechanical occupancy recognition sensor of claim 1, wherein: a positioning groove is formed in the sensor upper shell (1).

4. The mechanical occupancy recognition sensor of claim 3, wherein: the upper end of the trigger (7) is provided with an anti-falling lock pin, and the anti-falling lock pin penetrates through the built-in spring (8) to be matched with the inner positioning groove of the upper shell (1) of the sensor.

5. The mechanical occupancy recognition sensor of claim 1, wherein: and a positioning groove is arranged in the lower shell (4) of the sensor.

6. The mechanical occupancy recognition sensor of claim 5, wherein: and the PCB (6) is fixed in a positioning groove of the lower sensor shell (4) in a riveting mode.

7. The mechanical occupancy recognition sensor of claim 1, wherein: the lower shell (4) of the sensor is clamped with the bracket (2).

8. The mechanical occupancy recognition sensor of claim 1, wherein: the connector (5) and the lower sensor shell (4) are integrally formed in an injection molding mode.