CN103213560A

CN103213560A - Safety belt buckle sensor

Info

Publication number: CN103213560A
Application number: CN201310142080XA
Authority: CN
Inventors: 李明; 郁娇; 褚贵庭
Original assignee: Hamlin Electronics Suzhou Co Ltd
Current assignee: Hamlin Electronics Suzhou Co Ltd
Priority date: 2013-04-23
Filing date: 2013-04-23
Publication date: 2013-07-24
Anticipated expiration: 2033-04-23
Also published as: CN103213560B

Abstract

The invention provides a safety belt buckle sensor which comprises a plastic shell body, a push rod and a wafer component. The wafer component comprises drive wafers and driven wafers which are arranged at intervals, and the drive wafers and the driven wafers are capable of moving relatively to be electrically connected or disconnected. When a safety belt lock tongue is not inserted into the safety belt buckle, the push rod is arranged at a first position, and the push rod compresses the drive wafers to move to the position to be electrically connected with the driven wafers at the first position. When the safety belt lock tongue is inserted into the safety belt buckle, the push rod is arranged at the second position, the push rod leaves the drive wafers at the second position, and the drive wafers cut off the electrical connection with the driven wafers. Compared with the prior art, a mechanical switch principle is adopted by the safety belt buckle sensor, the safety belt buckle sensor is simple in structure, strong in integrated strength of a sensor, free of components like a magnet, a reed switch, a circuit board, a resistor and the like, and low in cost. The safety belt buckle sensor is not affected by factors like humidity, and simple and reliable in mechanical structure.

Description

The safety belt buckle sensor

Technical field

The present invention relates to sensor field, be specifically related to a kind of safety belt buckle sensor that is used on the automobile.

Background technology

Whether the safety belt buckle of the chief and vice operator seat of safety belt buckle sensor manned vehicle inserts and puts in place, with indication and the alarm control that is used for the safety belt buckle warning indicator lamp.The safety belt buckle sensor of Ying Yonging mostly is the dry-reed tube type in the market, though the outward appearance kind is numerous, and inner structure principle basically identical.Usually, the safety belt buckle sensor of dry-reed comprises triggering magnet, dry-reed tube, resistance and a private circuit plate; When the safety strap dead bolt inserts (safety strap is fastened), trigger magnet not within the operating distance of dry-reed tube, the inner contact of dry-reed tube is not in contact with one another, be open-circuit condition, the entire circuit loop disconnects, and the safety strap warning indicator lamp extinguishes, and system learns that safety strap fastens.When the safety strap dead bolt does not insert (safety strap is not fastened), trigger the operating distance that magnet arrives dry-reed tube, the inner contact of dry-reed tube is in contact with one another, be closure state, the conducting of entire circuit loop, the safety strap warning indicator lamp is bright, and system learns that safety strap do not fasten, have alarm sound to sound, warning occupant safety strap is not fastened.

Existing dry-reed safety belt buckle sensor needs magnet, dry-reed tube, and resistance, components and parts such as circuit card, cost is than higher; The intensity of circuit card is lower, and is physically fragile, and the circuit relative complex; Electronic devices and components are easily received environmental concernss such as humidity, form the short circuit equivalent risk.

Summary of the invention

In order to address the above problem, the purpose of this invention is to provide a kind of reliable and stable, safety belt buckle sensor that cost is low.

For achieving the above object, embodiments of the present invention are:

A kind of safety belt buckle sensor, comprise: plastic casing, with respect to plastic casing push rod movably, the contact assembly is installed on the described plastic casing, described contact assembly comprises the active contact that is provided with at interval and from movable contact spring, described active contact is with can be relative from movable contact spring movable described contact assembly be connected with lead to electrically connect or to disconnect, initiatively contact and when movable contact spring electrically connects lead switch on; When the safety strap dead bolt was not inserted in the safety belt buckle, described push rod was positioned at primary importance, in the position of the described push rod compressing of primary importance active contact to electric connection from movable contact spring; When the safety strap dead bolt was inserted in the safety belt buckle, described push rod was positioned at the second place, left initiatively contact at second place push rod, and initiatively contact disconnects and from the electric connection of movable contact spring.

Preferably, on the described push rod spring is installed, described spring compressing is oppressed described push rod to the second place.

Preferably, the arm that described plastic casing has a main body and extends from main body, described arm comprises the first arm, described active contact and from movable contact spring at least part be arranged in the first arm, described active contact is outside small part is positioned at the first arm, described push rod oppresses when described primary importance initiatively that contact electrically connects from movable contact spring, leaves initiatively contact when the described second place, and initiatively contact and disconnect from movable contact spring electrically connects.

Preferably, the inside end of described the first arm has perforate, and described active contact has hook portion, described hook portion is stretched out the first arm from described perforate, side towards the first arm of the end of described push rod has guiding rib, and described guiding rib aslope begins to extend upward from end.

Preferably, described arm also comprises second arm, and the described the first arm and second arm are provided with at interval and form the opening of a U-shaped.

Preferably, described active contact and be resilient metal member from movable contact spring.

Than prior art, the present invention adopts the mechanical switch principle, and is simple in structure, and the sensor bulk strength is big, do not need components and parts such as magnet, dry-reed tube, circuit card, resistance, and cost is lower.Be not subjected to factor affecting such as moisture, physical construction is simple and reliable.

Description of drawings

Fig. 1 is the scheme drawing of the safety belt buckle sensor of embodiments of the invention.

The specific embodiment

In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.

As Fig. 1, safety belt buckle sensor 1 comprises plastic casing 10, be installed in contact assembly 4 and contact 4 bonded assembly leads 5, push rod 3 on the plastic casing 10, be installed in the spring 2 on the push rod 3.In the present embodiment, contact assembly 4 comprises two selectable electric connections or open circuited contact, and the change in location of push rod 3 can make two contacts connect or disconnect, and inserts or do not insert state thereby indicate safety belt buckle to be in accordingly.

Continuation is with reference to Fig. 1, and the safety belt buckle sensor 1 of this moment is in safety belt buckle and inserts state.Plastic casing 10 has a main body and extended arm on the main body, described arm is basically perpendicular to main body and stretches out, described wall comprises a first arm 11 at least, but preferably also comprise one second arm 12, two arms are provided with at interval and form the opening of a U-shaped, and push rod 3 can be movable back and forth in this opening.

Two contacts comprise initiatively contact 41 and from movable contact spring 42, they are metal and make, and all be arranged in the first arm 11 to small part, and the part that is positioned at wherein are in strip, the bearing of trend basically identical of bearing of trend and the first arm 11, initiatively contact 41 parts are positioned at outside the first arm 11.The first arm 11 has the inboard and the outside, inboard towards opening, inboard end has the perforate towards opening, and initiatively contact 41 has hook portion 43, this hook portion 43 is partly extended perforate perpendicular to the bar shaped of active contact 41, and bends behind a segment distance, extends to the bottom of opening.

Initiatively contact 41 has elasticity, can be under external force towards from movable contact spring 42 activities with contact from movable contact spring 42, and after external force is removed, reset and break away from from movable contact spring 42.Push rod 3 oppresses when a primary importance initiatively that contact 41 electrically connects from movable contact spring 42, leaves initiatively contact 41 when a second place, and initiatively contact 41 and disconnect from movable contact spring 42 electrically connects.Initiatively contact 41 and lead 5 energisings when movable contact spring 42 electrically connects.Lead 5 energising indication safety strap dead bolts are not inserted in the safety belt buckle.

Push rod 3 is removable with respect to plastic casing 10, the terminal surface of push rod 3 has guiding rib to a side of the first arm, this guiding rib aslope, begin to extend upward from end, the end of push rod 3 can hold the hook portion 43 of the active contact 41 under the reset mode and not produce interference like this, and when push rod 3 stretched in opening, guiding rib was oppressed active contact 41 gradually to close from movable contact spring 42.By such setting, when push rod 3 was positioned at primary importance, push rod 3 extend in the opening, and guiding rib promotes hook portion 43 rollback to the first arm 11 in, made active contact 41 elastic deformations and touched from movable contact spring 42.When push rod 3 is positioned at the second place, push rod 3 for primary importance outside opening rollback, guiding rib is not interfered hook portion 43, hook portion 43 ejects the first arms 11, initiatively contact 41 recovers shapes and leaves from movable contact spring 42.

Be socketed with spring 2 on the push rod 3, spring 2 orders about push rod 3 and breaks away from openings, promptly orders about push rod 3 and moves to the second place from primary importance.

Under state shown in Figure 1, the dead bolt of safety strap inserts in the buckle, spring 2 orders about push rod 3 and is in the recoil position that breaks away from opening, be the second place, push rod 3 is not pushed to the active contact from movable contact spring bonded assembly position, and the circuit of safety belt buckle sensor 1 disconnects, lead 5 no signal currents, the indication safety strap inserts and puts in place, and the safety strap warning is closed, and indicator lamp extinguishes.When the safety strap dead bolt does not insert in the buckle, push rod 3 is subjected to compressing and moves downward, the application force that overcomes spring 2 is in the primary importance that enters opening, initiatively contact 41 is pushed to and is connected from movable contact spring 42, circuit turn-on, lead 5 has current signal, and the indication safety strap does not insert and puts in place, the safety strap warning is opened, and indicator lamp is bright and send alarm sound.

Above listed a series of detailed description only is specifying at feasibility embodiment of the present invention; they are not in order to restriction protection scope of the present invention, allly do not break away from equivalent embodiment or the change that skill spirit of the present invention done and all should be included within protection scope of the present invention.

Claims

1. safety belt buckle sensor, comprise: plastic casing, with respect to plastic casing push rod movably, it is characterized in that, the contact assembly is installed on the described plastic casing, and described contact assembly comprises the active contact that is provided with at interval and from movable contact spring, described active contact with can be relative movable from movable contact spring to electrically connect or to disconnect, described contact assembly is connected with lead, initiatively contact and when movable contact spring electrically connects lead switch on; When the safety strap dead bolt was not inserted in the safety belt buckle, described push rod was positioned at primary importance, in the position of the described push rod compressing of primary importance active contact to electric connection from movable contact spring; When the safety strap dead bolt was inserted in the safety belt buckle, described push rod was positioned at the second place, left initiatively contact at second place push rod, and initiatively contact disconnects and from the electric connection of movable contact spring.

2. safety belt buckle sensor according to claim 1 is characterized in that, on the described push rod spring is installed, and described spring compressing is oppressed described push rod to the second place.

3. safety belt buckle sensor according to claim 1, it is characterized in that, the arm that described plastic casing has a main body and extends from main body, described arm comprises the first arm, described active contact and from movable contact spring at least part be arranged in the first arm, described active contact is outside small part is positioned at the first arm, described push rod oppress initiatively contact electric connection from movable contact spring when described primary importance, leave initiatively contact when the described second place, initiatively contact and disconnect from movable contact spring electrically connects.

4. safety belt buckle sensor according to claim 3, it is characterized in that, the inside end of described the first arm has perforate, described active contact has hook portion, described hook portion is stretched out the first arm from described perforate, side towards the first arm of the end of described push rod has guiding rib, and described guiding rib aslope begins to extend upward from end.

5. safety belt buckle sensor according to claim 3 is characterized in that described arm also comprises second arm, and the described the first arm and second arm are provided with at interval and form the opening of a U-shaped.

6. safety belt buckle sensor according to claim 1 is characterized in that, described active contact and be resilient metal member from movable contact spring.