CN203267984U

CN203267984U - Safety belt snap joint sensor

Info

Publication number: CN203267984U
Application number: CN201320207265XU
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: 2013-11-06
Anticipated expiration: 2023-04-23

Abstract

The utility model provides a safety belt snap joint sensor. The safety belt snap joint sensor comprises a plastic shell, a pushing rod and a contact assembly. The contact assembly comprises driving contacts and driven contacts, and the driving contacts and the driven contacts are arranged at intervals and can relatively move to achieve electrical connection and disconnection. When a safety belt spring bolt is not inserted in a safety belt snap joint, the pushing rod is located at the first position, and the pushing rod presses the driving contacts to move from the first position to the position where the driving contacts are electrically connected with the driven contacts. When the safety belt spring bolt is inserted in the safety belt snap joint, the pushing rod is located at the second position, the pushing rod is separated form the driving contacts at the second position, and the electrical connection between the driving contacts and the driven contacts is disconnected. Compared with the prior art, the safety belt snap joint sensor adopts the mechanical switch principle, is simple in structure and large in whole strength of the sensor, does not need elements such as a magnet, a reed switch, a circuit board and a resistor, is low in cost, cannot be influenced by factors such as humidity and is simple and reliable in mechanical structure.

Description

The safety belt buckle sensor

Technical field

The utility model relates to sensor field, is specifically related to a kind of for the safety belt buckle sensor on automobile.

Background technology

Whether the safety belt buckle of the positive co-driver of safety belt buckle sensor detection manned vehicle inserts and puts in place, to be used for indication and the alarm control of safety belt buckle warning indicator lamp.The safety belt buckle sensor of using in the market mostly is the dry-reed tube type, although the outward appearance kind is numerous, the inner structure principle is basically identical.Usually, the safety belt buckle sensor of dry-reed comprises triggering magnet, dry-reed tube, resistance and a Special circuit board; 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, whole 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, whole circuit loop conducting, 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, the components and parts such as circuit card, cost compare is high; The intensity of circuit card is lower, and is physically fragile, and the circuit relative complex; Electronic devices and components are easily received moist grade for environmental concerns, form the short circuit equivalent risk.

The utility model content

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

For achieving the above object, embodiment of the present utility model is:

A kind of safety belt buckle sensor, comprise: plastic casing, with respect to plastic casing push rod movably, the contact assembly is installed on described plastic casing, described contact assembly comprises active contact that the interval arranges and from movable contact spring, described active contact is with can be relative from movable contact spring movable described contact assembly be connected with wire to be electrically connected or to disconnect, initiatively contact and when being electrically connected from movable contact spring wire switch on; When the safety strap dead bolt was not inserted in 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 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 described push rod, spring is installed, described spring is to the described push rod of second place compressing.

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 least part of first arm that is arranged in of movable contact spring, described active contact is at least part of to be positioned at outside the first arm, described push rod oppresses when described primary importance initiatively that contact is electrically connected from movable contact spring, leaves initiatively contact when the described second place, and initiatively contact and disconnecting from movable contact spring is electrically connected.

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, a side towards the first arm of the end of described push rod has guiding rib, and described guiding rib is ramp-like, begins to extend upward from end.

Preferably, described arm also comprises the second arm, and described the first arm and the second arm interval arrange 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 utility model adopts the mechanical switch principle, and simple in structure, the sensor bulk strength is large, does not need the components and parts such as magnet, dry-reed tube, circuit card, resistance, and cost is lower.Not affected by the factors such as moisture, physical construction is simple and reliable.

Description of drawings

Fig. 1 is the schematic diagram of the safety belt buckle sensor of embodiment of the present utility model.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

As Fig. 1, safety belt buckle sensor 1 comprises plastic casing 10, is arranged on the contact assembly 4 on plastic casing 10, are connected with contact the wire 5, the push rod 3 that connect, be arranged on the spring 2 on push rod 3.In the present embodiment, contact assembly 4 comprises the contact of two selectable electric connections or disconnection, 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 accordingly safety belt buckle to be in.

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 first arm 11 at least, but preferably also comprise second arm 12, two arm intervals arrange 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 at least part ofly are arranged in the first arm 11, and the part that is positioned at wherein is in strip, the bearing of trend of bearing of trend and the first arm 11 is basically identical, and initiatively contact 41 parts are positioned at outside the first arm 11.The first arm 11 has 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 after 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 reset after external force is removed and break away from from movable contact spring 42.Push rod 3 oppresses when a primary importance initiatively that contact 41 is electrically connected from movable contact spring 42, leaves initiatively contact 41 when a second place, and initiatively contact 41 and disconnecting from movable contact spring 42 is electrically connected.Initiatively contact 41 and wire 5 energisings when being electrically connected from movable contact spring 42.Wire 5 energising indication safety strap dead bolts are not inserted in 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 is ramp-like, begin to extend upward from end, the end of push rod 3 can hold the hook portion 43 of the active contact 41 under reset mode and not produce interference like this, and when push rod 3 stretched in the opening, guiding rib was oppressed initiatively 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 opening, and guiding rib promotes hook portion 43 to the first interior rollback of arm 11, made initiatively 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 push rod 3, spring 2 orders about push rod 3 and breaks away from opening, namely orders about push rod 3 and moves to the second place from primary importance.

Under state shown in Figure 1, the dead bolt plug card of safety strap is smashed, 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 position that connects from movable contact spring, and the circuit of safety belt buckle sensor 1 disconnects, wire 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 not plug card smash, push rod 3 is subject 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 movable contact spring 42 connections, circuit turn-on, wire 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 is only illustrating for feasibility embodiment of the present utility model; they are not to limit protection domain of the present utility model, all disengaging within equivalent embodiment that the utility model skill spirit does or change all should be included in protection domain of the present utility model.

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 described plastic casing, and described contact assembly comprises active contact that the interval arranges and from movable contact spring, described active contact with can be relative movable to be electrically connected or to disconnect from movable contact spring, described contact assembly is connected with wire, initiatively contact and when being electrically connected from movable contact spring wire switch on; When the safety strap dead bolt was not inserted in 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 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 described push rod, spring is installed, and described spring is to the described push rod of second place compressing.

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 least part of first arm that is arranged in of movable contact spring, described active contact is at least part of to be positioned at outside the first arm, and described push rod oppresses when described primary importance initiatively that contact is electrically connected from movable contact spring, leave initiatively contact when the described second place, initiatively contact and disconnecting from movable contact spring is electrically connected.

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, a side towards the first arm of the end of described push rod has guiding rib, and described guiding rib is ramp-like, begins to extend upward from end.

5. safety belt buckle sensor according to claim 3, is characterized in that, described arm also comprises the second arm, and described the first arm and the second arm interval arrange 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.