CN201440397U - Magnetic crash sensor - Google Patents
Magnetic crash sensor Download PDFInfo
- Publication number
- CN201440397U CN201440397U CN2009201333942U CN200920133394U CN201440397U CN 201440397 U CN201440397 U CN 201440397U CN 2009201333942 U CN2009201333942 U CN 2009201333942U CN 200920133394 U CN200920133394 U CN 200920133394U CN 201440397 U CN201440397 U CN 201440397U
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- CN
- China
- Prior art keywords
- conducting strip
- cavity
- magnetic
- crash sensor
- spheroid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a magnetic crash sensor, which comprises a casing, a conducting strip, a cap body and a ball body, wherein the casing is inside provided with a cavity with one end thereof being opened and sealed via the cap body, the ball body can be movably arranged within the cavity, one end of the conducting strip stretches out of the casing and the other end of the conducting strip is arranged in the cavity of the casing; the magnetic crash sensor is characterized in that the conducting strip comprises a first conducting strip and a second conducting strip having no contact with the first conducting strip, one end of the first conducting strip and one end of the second conducting strip which are arranged in the cavity are positioned at any end of the cavity and are in contact with the ball body respectively, and the ball body served as an electrically conductive magnetic ball body is adsorbed to one end of the first conducting strip and one end of the second conducting strip, which are arranged in the cavity. The magnetic crash sensor has simple structure and high reliability.
Description
Technical field
The utility model relates to sensor field, relates in particular to a kind of magnetic-type crash sensor.
Background technology
Air bag system mainly comprises transducer, gas generating unit, folding air bag and control unit etc.Transducer is responsible for constantly gathering the deceleration signal of automobile; Gas generating unit is then ignited solid-state jet fuel and inflation, be full of air bag at short notice; The folding air bag of placing generally is not have the coating RIPSTOP preferably with more pliable and tougher, air-tightness to make; Control unit then is the core of whole system, and the information that it will degree of will speed up transducer transmits is analyzed comparison, and is accurate and make the order that whether triggers apace.The reliability of initial mechanical air bag system is very limited, and along with the continuous development of electronic technology, various kinds of sensors is widely used in the automobile air-bag system.Utilize the transducer can be when traffic accident takes place; judge the power of this traffic accident exactly; sending signal by transducer (as crash sensor) accurately judges ECU; the member is reached maximum protection; avoid taking place air bag mistake situation quick-fried or that can not in time open when needing protection and take place, thus make the more mechanical air bag system of air bag system more accurately, quick and reliable.
In the prior art, the transducer of control air bag mostly is contact greatly, inertia-type crash sensor described in patent No. CN01268160, comprise steel ball, magnet, contact spring and the magnet holder that is used to install magnet, this contact spring also comprises contact spring and following contact spring, and also needs to carry out the interval with isolating pad between them.Under normal circumstances, steel ball is adsorbed on the magnet under the effect of magnet, when bumping, if the inertia force that is subjected to of steel ball greater than the magnetic force of magnet then steel ball can break away from constraint machinery contact short when hitting contact spring, and then control system is ignited air bag according to the state of transducer.Yet the mechanical type of this transducer collision reliability is not high, when collision, and the reason of invar ball position of collision, contact spring may not can come in contact up and down, thereby is easy to generate this quick-fried situation of air bag, the life security that jeopardizes the occupant.Simultaneously, this sensor bulk is bigger, and amount of parts is many, complex structure, thereby cost is higher.
The utility model content
Not high for solving the reliability that the magnetic-type crash sensor exists in the prior art, baroque problem, it is a kind of simple in structure that the utility model provides, the magnetic-type crash sensor that reliability is high.
The utility model provides a kind of magnetic-type crash sensor, comprise housing, conducting strip, lid and spheroid, has a cavity in the described housing, cavity one end opening and seal by lid, described spheroid is arranged in the cavity movably, one end of described conducting strip stretches out in outside the described housing, the other end places the cavity of housing, it is characterized in that, described conducting strip comprises first conducting strip and second conducting strip that does not come in contact with first conducting strip, an end that places cavity of described first conducting strip and second conducting strip is positioned at any end of described cavity, first conducting strip contacts with described spheroid respectively with an end that places cavity of second conducting strip, described spheroid is conductive magnetic spheres, adsorbs mutually with an end that places cavity of described first conducting strip and second conducting strip.
The magnetic-type crash sensor that the utility model provides by the contacting and not contacting of magnetic spheres and conducting strip, is accurately realized the connection and the disconnection of circuit, reaches the purpose that accurate control air bag is ignited opportunity, the performance reliability height; Simultaneously, whole magnetic-type crash sensor is owing to only be provided with several parts such as magnetic spheres and conducting strip, and adopts between conducting strip and the magnetic spheres and directly contact annexation, makes this magnetic-type crash sensor number of components and parts significantly reduce, simple in structure, easy to assembly quick.
Description of drawings
Fig. 1 is the cross-sectional schematic according to a kind of execution mode of magnetic-type crash sensor of the present utility model;
Fig. 2 is the schematic diagram according to the conducting strip mounting structure of a kind of execution mode of magnetic-type crash sensor of the present utility model.
Embodiment
To and come in conjunction with the accompanying drawings the utility model is elaborated by embodiment below.
As shown in Figure 1, a kind of execution mode according to magnetic-type crash sensor of the present utility model, the magnetic-type crash sensor comprises housing 1, conducting strip 2, lid 3 and spheroid 4, has a cavity 5 in the described housing 1, cavity 5 one end openings and by lid 3 sealing, simultaneously can also be added on fluid sealant again and further seal, cavity 5 is played the effect of waterproof and dustproof.Described spheroid 4 is arranged in the cavity 5 movably, one end of described conducting strip 2 stretches out in outside the described housing 1, the other end places the cavity 5 of housing 1, described conducting strip 2 comprises first conducting strip 6 and second conducting strip 7 that does not come in contact with first conducting strip 6, an end that places cavity 5 of described first conducting strip 6 and second conducting strip 7 is positioned at any end of described cavity 5, first conducting strip 6 contacts with described spheroid 4 respectively with an end that places cavity 5 of second conducting strip 7, described spheroid 4 is conductive magnetic spheres, adsorbs mutually with an end that places cavity 5 of described first conducting strip 6 and second conducting strip 7.
Described spheroid 4 is conductive magnetic spheres, utilize magnetic material commonly used such as aluminium nickel cobalt, SmCo, neodymium iron boron etc., spheroid described in the present embodiment 4 adopts the neodymium iron boron material to make, make the spheroid 4 of respective diameters according to the volume of required transducer, and according to the quality of spheroid 4, spheroid 4 is magnetized, can carry out gold-plated processing to spheroid 4 surfaces simultaneously, so promptly reduce the resistance on spheroid 4 surfaces, and don't can influence the magnetic field intensity of spheroid 4.Described cavity 5 shapes and described spheroid 4 shapes are suitable, described spheroid 4 can move towards described cavity 5 other ends with conducting strip 2 contacted ends in described cavity 5 in cavity 5, in the present embodiment, described cavity 5 shapes can be provided with cylindrical structure, and described spheroid 4 can be from moving towards described lid 3 one ends with described conducting strip 2 contacted ends in cavity 5.See also Fig. 2 and show, an end that places cavity 5 of described first conducting strip 6 and second conducting strip 7 has the structure of described spheroid 4 parts of parcel respectively, is hemispherical shape in the present embodiment, and contacts with described spheroid 4 formation faces.Certainly, described first conducting strip 6 can also form with described spheroid 4 respectively with an end that places cavity 5 of second conducting strip 7 that some contact or line contacts.The conducting strip of described conducting strip 2 for making with the metal material that spheroid adsorbs mutually, as iron, nickel, cobalt, iron cobalt nickel alloy etc., in the present embodiment, described conducting strip 2 adopts nickel.The end that described first conducting strip 6 and second conducting strip 7 stretch out described housing 1 is electrically connected with air bag ECU.
In addition, described magnetic-type crash sensor also comprises elastomer 8, and described elastomer 8 is fixed on the other end that is provided with conducting strip 2 in the described cavity 5.One end is arranged on the lid 3 in the described cavity 5 by being fixed in.Described elastomer 8 is spring or rubber, and in the present embodiment, elastic component 8 one ends are arranged on the lid 3 in the described cavity 5 by being fixed in, and elastomer 8 is a stainless steel spring, is fixed on the lid 3 by modes such as plastic or bondings.
Described magnetic-type crash sensor also comprises magnetic conductor 9, described magnetic conductor is positioned at housing 1 outside, described magnetic conductor 9 coats an end that is provided with conducting strip 2 of described housing 1, and described conducting strip 2 and the spheroid 4 when contacting with conducting strip are all in the parcel scope of magnetic conductor 9.Described magnetic conductor 9 can be pure iron, cobalt, nickel, and in the present embodiment, described magnetic conductor 9 adopts pure iron to make.Described magnetic conductor 9 can shield the magnetic field that spheroid 4 produces again so that spheroid 4 can adsorb with conducting strip 2 mutually with less magnetic force, disturbs and this magnetic-type crash sensor can not produced other electronic equipments on the vehicle.
When collision happens, because the intensity difference of collision is also different to the effect of this magnetic-type crash sensor.Before the collision, the spheroid 4 and first conducting strip 6 and second conducting strip 7 combine by magnetic force, represented in entire circuit and be communicated with, because the energy effect of inertia that collision produces, between the effect of inertia force is greater than spheroid 4 and conducting strip 2 during magnetic force, spheroid 4 moves to the direction of elastomer 8 in cavity 5, first conducting strip 6 and second conducting strip 7 are disconnected, cause circuit breaker, form switching signal, spheroid 4 contacts with elastomer 8, after elastomer 8 is compressed to a certain degree, because the effect of elastic component 8, spheroid 4 is reflected back to the initial position that contacts with second conducting strip 7 with first conducting strip 6 again, and circuit is conducting again, for whole signal source, such process of returning shows as a switching signal in side circuit, air feed capsule ECU gathers.But the moment of vehicle collision, because the effect of vehicle energy-absorbing is in the transmittance process of an energy that certain hour arranged, certainly will make spheroid 4 in cavity 5, can be subjected to the impact of energy repeatedly, and in the circuit of reality, will show as a switching signal or a plurality of switching signal, a switching signal or a plurality of switching signal are because the energy size of collision causes, when one or more switching signal, air bag ECU is again in conjunction with the concrete vehicle condition information of vehicle, the operation of Comprehensive Control air bag.
Claims (9)
1. magnetic-type crash sensor, comprise housing, conducting strip, lid and spheroid, has a cavity in the described housing, cavity one end opening and seal by lid, described spheroid is arranged in the cavity movably, one end of described conducting strip stretches out in outside the described housing, the other end places the cavity of housing, it is characterized in that, described conducting strip comprises first conducting strip and second conducting strip that does not come in contact with first conducting strip, an end that places cavity of described first conducting strip and second conducting strip is positioned at any end of described cavity, first conducting strip contacts with described spheroid respectively with an end that places cavity of second conducting strip, described spheroid is conductive magnetic spheres, adsorbs mutually with an end that places cavity of described first conducting strip and second conducting strip.
2. magnetic-type crash sensor according to claim 1 is characterized in that, described cavity geometry and described spheroid form are suitable, and described spheroid can move towards the described cavity other end with the contacted end of conducting strip in described cavity in cavity.
3. magnetic-type crash sensor according to claim 2 is characterized in that, described spheroid can be from moving towards described lid one end with the contacted end of described conducting strip in cavity.
4. magnetic-type crash sensor according to claim 1 is characterized in that, described magnetic-type crash sensor also comprises elastomer, and described elastomer is fixed on the other end that is provided with conducting strip in the described cavity.
5. magnetic-type crash sensor according to claim 4 is characterized in that, described elastomer one end is arranged on the lid in the described cavity by being fixed in.
6. magnetic-type crash sensor according to claim 1 is characterized in that, described first conducting strip and second conducting strip place an end of cavity to have the structure of wrapping up a described spheroid part respectively, and contact with described spheroid formation face.
7. magnetic-type crash sensor according to claim 1 is characterized in that: described first conducting strip contacts or the line contact with described spheroid formation point respectively with an end that places cavity of second conducting strip.
8. magnetic-type crash sensor according to claim 1 is characterized in that: the magnetic-type crash sensor also comprises magnetic conductor, and described magnetic conductor coats an end that is provided with conducting strip of described housing.
9. magnetic-type crash sensor according to claim 1 is characterized in that: the conducting strip of described conducting strip for making with the metal material that spheroid adsorbs mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201333942U CN201440397U (en) | 2009-06-30 | 2009-06-30 | Magnetic crash sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201333942U CN201440397U (en) | 2009-06-30 | 2009-06-30 | Magnetic crash sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440397U true CN201440397U (en) | 2010-04-21 |
Family
ID=42545059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201333942U Expired - Lifetime CN201440397U (en) | 2009-06-30 | 2009-06-30 | Magnetic crash sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201440397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835681A (en) * | 2014-04-09 | 2015-08-12 | 北汽福田汽车股份有限公司 | Collision power-off sensor and vehicle provided with same |
-
2009
- 2009-06-30 CN CN2009201333942U patent/CN201440397U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835681A (en) * | 2014-04-09 | 2015-08-12 | 北汽福田汽车股份有限公司 | Collision power-off sensor and vehicle provided with same |
| CN104835681B (en) * | 2014-04-09 | 2017-11-03 | 北汽福田汽车股份有限公司 | Cutting electricity in collision sensor and the vehicle with the cutting electricity in collision sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100421 |