CN207594898U - Electronic control unit - Google Patents

Abstract

Electronic control unit disclosed in the utility model, including：Outer cover including side wall and top surface, side wall and top surface form a receiving space, the first openend that side wall and top surface restriction are connected with receiving space；Side wall defines the second openend connected with receiving space in the position opposite with top surface；The printed circuit-board assembly being fixed in receiving space；The connector being connect with printed circuit-board assembly, connector are installed on the first openend；Close the back cover of the second openend；The first buffer unit being disposed in proximity on the side wall of the first openend, the first buffer unit extend from side wall to the direction far from receiving space；It is oppositely disposed with the first buffer unit in the second buffer unit on the side wall of the first openend or on back cover, the second buffer unit is extended outwardly from side wall or back cover to the side far from receiving space；First and second buffer unit extends beyond the edge of back cover to the direction far from receiving space.The electronic control unit can effectively bear external impact load.

Description

Electronic control unit

Technical field

This application involves a kind of control devices more particularly to a kind of for the electronic control of on-vehicle safety air bag to be controlled to fill It puts.

Background technology

Control device applied to motor vehicles for example controls the electronic control unit of on-vehicle safety air bag to be commonly equipped with The shell being suitably mounted on the structure member of motor vehicles.In the shell, printed circuit board bearing electronic control unit Realize the electronic component needed for function.In addition, the shell of electronic control unit is also equipped with the connector for wiring, carry For the communication between sensor, actuator or other control devices.

Electronic control unit may due to hitting or falling, such as in the structure member for being assembled to motor vehicles because Operation error and fall the damage for leading to electronic control unit shell in addition damage electronic control unit inside electronics member device Part.Even if the sign from external inspection less than damage, but may still cause electronic control unit internal electronic component fragmentation Damage either loosens the deformation or loosening of the stitch of such as connector, becomes hidden danger when electronic control unit uses.

Therefore electronic control unit needs to consider anti-drop in design, i.e., electronic control unit needs to bear 1m or 2m rule The impact force generated in the case of fixed falling height is damaged without internal injury and function；Or damage is from outside.

Need new technical solution so that electronic control unit reaches above-mentioned requirements.

Utility model content

In view of one or more problem in the prior art, this application discloses a kind of electronic control units.This What the technical solution of invention was realized in：

A kind of electronic control unit (1), which is characterized in that including：

Outer cover (2), the outer cover (2) include side wall (2b) and top surface (2a), the side wall (2b) and the top surface (2a) forms a receiving space (A), and the side wall (2b) and the top surface (2a) are defined and connected with the receiving space (A) The first openend (2c)；The side wall (2b) defines and the receiving space in the position opposite with the top surface (2a) (A) the second openend (2d) of connection；

Printed circuit-board assembly (3), the printed circuit-board assembly (3) are fixed in the receiving space (A)；

Connector (5), the connector (5) connect with the printed circuit-board assembly (3), connector (5) installation In first openend (2c)；

Back cover (4), the back cover (4) close second openend (2d)；

First buffer unit (24), first buffer unit (24) are disposed in proximity to the institute of first openend (2c) It states on side wall (2b), first buffer unit (24) is prolonged from the side wall (2b) to the direction far from the receiving space (A) It stretches；

Second buffer unit (23), second buffer unit (23) relatively set with first buffer unit (24) It is disposed adjacent on the side wall (2b) of first openend (2c) or on the back cover (4), second buffer unit (23) by the side wall (2b) or the back cover (4)

Extend outwardly to the side far from the receiving space (A)；

First buffer unit (24) and second buffer unit (23) are to the direction far from the receiving space (A) Extend beyond the edge of the back cover (4).

Preferably, the side wall (2b) including be oppositely arranged first side (2b1), second side (2b2) and connection institute State the third side (2b3) of first side (2b1), second side (2b2), the first side (2b1), second side (2b2) First openend (2c) is defined with top surface (2a)；The first side (2b1), second side (2b2) and third side Face (2b3) defines second openend (2d)；First buffer unit (24) is set to the first side (2b1) On, and close to the first side (2b1) at the edge of second openend (2d).

Preferably, the connector (5) includes at least two fixed protrusions (51), and the fixed protrusion (51) is with setting Put the location hole interference connection on the printed circuit-board assembly (3), the line of two fixed protrusions (51) and institute It states first side (2b1) and the second side (2b2) is intersecting；First buffer unit (24) be set to two it is described solid Determine projection with the edge-perpendicular of the first side (2b1) of the line of protrusion (51) in the first side (2b1) On line.

Preferably, second buffer unit (23) is set in the second side (2b2), and close to described Two side faces (2b2) are at the edge of second openend (2d)；Second buffer unit (23) is set to two fixations Projection line with the edge-perpendicular of the second side (2b2) of the line of protrusion (51) in the second side (2b2) On.

Preferably, the back cover (4) includes at least two stabilizer blades (21,22,23), stabilizer blade (21,22, the 23) connection To the back cover (4), the stabilizer blade (21,22,23) installs object for being fixed on；Second buffer unit is the stabilizer blade (21,22,23), the stabilizer blade (21,22,23) are oppositely disposed with first buffer unit (24) and are leaned in the back cover (4) The corner of nearly first openend (2c).

Preferably, first buffer unit (24) and second buffer unit (23) are to far from the receiving space (A) direction extends beyond the edge at least 5mm of the back cover (4).

Preferably, the outer cover (2) is made of plastics, first buffer unit (24) with same material integrally with The outer cover (2) is molded together.

Preferably, the elastoplastic that first buffer unit (24) and the outer cover (2) have different rigidity by two kinds It is formed, the rigidity of the outer cover (2) is higher than the rigidity of first buffer unit (24).

Preferably, second buffer unit (23) is integrally molded together with same material with the outer cover (2).

Preferably, at least part of the outer profile of first buffer unit (24) and second buffer unit (23) For arc；First buffer unit (24) further includes the lug boss (25) for extending to the side wall (2b).

According to the utility model proposes electronic control unit, external impact load can be born, while can be reliable Ground recognizes the impact load not allowed from outside, while by making electricity for the selected corresponding shape and size of buffer unit Sub- control device can adapt to the limit allowed, and until this limit, the function of electronic control unit internal structure can be with It experiences a shock and not damaged.

Description of the drawings

Embodiment or technical solution of the prior art in order to illustrate more clearly of the utility model, below to embodiment Or attached drawing needed to be used in the description of the prior art does simple introduction.It should be evident that described attached drawing is this practicality Some novel embodiments to those skilled in the art, without having to pay creative labor, may be used also To obtain other attached drawings according to these attached drawings.

Fig. 1 shows the stereogram of the electronic control unit according to the utility model specific embodiment；

Fig. 2 is the structural decomposition diagram of the electronic control unit in Fig. 1；

Fig. 3 is the three-dimensional structure diagram of the connector in electronic control unit in Fig. 2；

Fig. 4 is the schematic diagram that the connector in Fig. 3 is mounted on printed circuit-board assembly；

Fig. 5 is the dimensional structure diagram of another angle of the electronic control unit in Fig. 1；

Fig. 6 is the partial structurtes enlarged diagram of the outer cover of the electronic control unit in Fig. 1；

Fig. 7 a and Fig. 7 b are that the state rolled after being hit when the electronic control unit in Fig. 1 falls with ground is illustrated Figure.

Specific embodiment

In order to enable those skilled in the art to better understand the technical solutions of the present invention, below in conjunction with the accompanying drawings and specifically Embodiment the utility model is described in further detail.

As the utility model specific embodiment, Fig. 1 to 7 is shown with cuboid shape or substantially The control device of square shape housing.The work of the air bag of such as motor vehicles of control device control in the present embodiment Make.The control device is preferably to be arranged on the comparatively safe region of vehicle for example between pilot set and assistant driver seat Commonly known as in the region of channel, for lighting a kind of electricity of the igniter of air bag when vehicle crashes Sub- control device 1.With reference to figure 2, electronic control unit 1 includes：Outer cover 2, printed circuit-board assembly 3, back cover 4 and connector 5.

Outer cover 2 is the box like structure by injection molding, and outer cover 2 defines a three-dimensional receiving space A, is printed Circuit board assemblies 3 are mounted in receiving space A, are protected so as to which outer cover 2 can apply printed circuit-board assembly 3.Outer cover 2 is excellent Selection of land is made of polypropylene glass, therefore outer cover 2 is easily deformed and easily absorbs the energy for hitting and generating.Outer cover 2 includes top table Face 2a, lateral surface 2b, stabilizer blade 21,22,23.Outer cover 2 further includes the openings of the first openend 2c connected with receiving space A and second There is no covered end 2d, i.e. openend 2c and openend 2d by lateral surface 2b.With reference to figure 1, side wall 2b includes be oppositely arranged the The one side 2b1 and second side 2b2 and third side 2b3 for connecting first side 2b1 and second side 2b2.First side The rib of face 2b1, second side 2b2 and top surface 2a define the first openend 2c, third side 2b3 and the first openend 2c It is oppositely disposed.The rib of first side 2b1, second side 2b2 and third side 2b3 define the second openend 2d.

Printed circuit-board assembly 3 is preferably the device in plane, and printed circuit-board assembly 3 includes the control being arranged on The electronic component of air bag work processed.With reference to figure 3 and Fig. 4, printed circuit-board assembly 3 is gone back and is attached with external equipment With the connection of the connector 5 comprising plug receptacle of communication.Connector 5 includes fixed protrusion 51, positioning salient 52.It is fixed prominent It plays the location hole that portion 51 is stretched on printed circuit-board assembly 3 and is interference fitted fixed connection device 5 with the location hole；It guides simultaneously prominent Go out the location hole that portion 52 is stretched on printed circuit-board assembly 3.Connector 5 is fixedly installed to printed circuit in the above manner Plate component 3.As printed circuit-board assembly 3 is installed to outer cover 2, connector 5 is mounted to the first openend 2c of outer cover 2.

Back cover 4 is generally rectangular in shape, is made of metal material.Back cover 4 protects the back side of printed circuit-board assembly 3.Tool Body, the second openend 2d of 4 closed cover 2 of back cover.It is understood that back cover 4 can also be integrally formed with outer cover 2.Into One step, threaded hole is respectively arranged on outer cover 2, printed circuit-board assembly 3 and back cover 4, fastener such as bolt 10 passes through spiral shell Outer cover 2, printed circuit-board assembly 3 and back cover 4 are fixed together by pit.

On back cover 4, it is provided integrally with supplied for electronic control device 1 and installs to installation position specific in motor vehicle body Stabilizer blade 21,22,23.Stabilizer blade 21,22,23 with 4 same metal material of back cover preferably by being made.Divide on stabilizer blade 21,22,23 The through-hole of upper and lower directions She You not run through, the installation position to motor vehicles is carried out with screw or bolt for being inserted into these through-holes etc. Electronic control unit 1 is installed.In the present embodiment, the first stabilizer blade 21, the second stabilizer blade 22 and third stabilizer blade 23.It is appreciated that It is that 21,22,23 position on back cover 4 of stabilizer blade can be changed according to different installation requirements and installation position.

With reference to figure 5 and Fig. 6, include the first buffer unit 24 on side wall 2b, the first buffer unit 24 is arranged on first side The position of the upper close first openend 2c of 2b1.First buffer unit 24 can have any shape to be protruded outward by side wall 2b, is Extend to the direction far from receiving space A.In the present embodiment, at least part of the outer profile of the first buffer unit 24 is arc Shape.First buffer unit 24 further includes the lug boss 25 that side wall 2b is extended to from its surface.Further, the first buffer unit 24 are set on first side 2b1 close to the edge of the second openend 2d.Further, the company of two fixed protrusions 51 Line intersects with first side 2b1；First buffer unit 24 is set to the line of two fixed protrusions 51 on first side 2b1 The projection line with the edge-perpendicular of first side 2b1 on.First buffer unit 24 prolongs to the direction far from the receiving space A Extend over the edge of back cover 4.Further, in orthographic projection with the edge of back cover 4 that the first buffer unit 24 overlaps relative to Other edges not overlapped are closer to lateral wall 2b.

With reference to figure 1 and Fig. 3, the first buffer unit 24 and the third stent 23 as the second buffer unit are relatively distributed In the first openend 2c namely close to the both sides of connector 5.In the present embodiment, third stabilizer blade 23 is preferably formed in back cover 4 Corner.Further, 23 and first buffer unit 24 of third stabilizer blade is oppositely disposed in back cover 4 close to the first openend The corner of 2c.Third stabilizer blade 23 extends beyond the edge of back cover 4 to the direction far from the receiving space A.

First buffer unit 24 is made of flexible plastic material, can with 2 same material of outer cover integrally with outside Cover 2 injection moldings together.First buffer unit 24 and outer cover 2 can also be two kinds of elastoplastic manufactures with different rigidity and Into in this case, the rigidity of of outer cover 2 itself is higher than the rigidity of the first buffer unit 24.Made by the method for injection molding It obtains the first buffer unit 24 to manufacture together with outer cover 2, hardly increases manufacturing expense.First buffer unit 24 is reaching given Shock loading before be elastically deformable.

With reference to figure 7a and Fig. 7 b, when electronic control unit 1 falls, the internal structure and quality of electronic control unit 1 Distribution causes outer cover 2 easily first to contact hard ground in the corner of the second openend 2d.If at the first openend 2c That is the corner of the outer cover 2 of connector 5 contacts ground first, and impact force may install connector 5 to printed circuit board group The fixed protrusion 51 and/or positioning salient 52 of part 3 impact, and send out fixed protrusion 51 and/or positioning salient 52 Raw displacement even comes off.

By taking the first buffer unit 24 contacts first with the ground of hard as an example, the first buffer unit 24 is due to its thin-wall construction Form is stablized not as good as outer cover 2, so can deform when the first buffer unit 24 is dropped on ground.If falling height compared with It is small, then in free-falling since the impact force that the potential energy of electronic control unit 1 converts is by the first buffer part for deforming Part 24 absorbs or is transferred to outer cover 2 and absorbed by the good outer cover 2 of energy absorption performance, and impact force therefore will not the company of being directed to It connects on device 5, so as to protect the fixed protrusion 51 of connector 5 and positioning salient 52.It also reduces simultaneously and falls generation Acceleration avoids the hidden damage of 1 inner structure component of electronic control unit.

First buffer unit 24 protrudes from the outer cover 2 of electronic control unit 1, therefore is sent out in the first buffer unit 24 with ground After raw collision, anticlockwise rotation occurs for electronic control unit 1, and subsequent first support 21 occurs to connect for the second time with ground It touches, impact energy is transferred to back cover 4 by first support 21, is then passed to outer cover 2, is absorbed by outer cover 2, falls the impact of generation Energy is further absorbed, so as to further protect the structure member in electronic control unit 1.It is connect for the second time with ground simultaneously Tactile first support 21 protects the fixed protrusion 51 of connector 5 and positioning prominent more in this way far from the first openend 2c Going out portion 52 is not influenced by falling.

When the third stabilizer blade 23 for being set to 4 corner of back cover contacts ground first, impact force absorb path with it is above-mentioned Process is similar.

In order to which the function of the internal structure and electronic control unit 1 with electronic control unit 1 is adapted, the first buffer unit 24 can have the height such as different protrusions, section or Strip block pattern shape and size.The first buffer part after selected The shape and size of part 24 and the structure member and Mass Distribution of electronic control unit 1 are adapted so that electronic control unit 1 exists Damage is not generated to internal structure when falling and met simultaneously and must be subjected to live what is brought by regulation falling height Impact.Preferably, in the present embodiment, first buffer unit 24, third stabilizer blade 23 outer profile at least contacted with ground Part is arcuate structure.

Further, the first buffer unit 24 on 2 rib of outer cover and stabilizer blade 21,22,23 arbitrarily fall in electronic control unit 1 Cushioning effect is played when falling on hard floor.If impact force be more than in advance as defined in the limit, electronic control unit 1 it is interior Portion's structure may be damaged, and this damage can such as be deformed by the damage of the first buffer unit 24 or stabilizer blade 21,22,23 Or it is broken to identify.Such as when the first buffer unit 24 contacts ground first, then after impact force oversteps the extreme limit, first is slow Plastic deformation even fracture can be occurred by rushing component 24.Therefore structure through this embodiment is effectively protected when falling Electronic control unit 1, while also reliably identify because caused by the operation error being likely to occur inside electronic control unit 1 Structure damage.

As long as it should be understood that on the position such as outer cover 2 and/or back cover 4 close to the both sides of connector 5 relatively First buffer unit 24 and the second buffer unit projecting part for example as stabilizer blade 23 are set, occurred in electronic control unit 1 The first buffer unit 24 and the second buffer unit or stabilizer blade 21,22,23 contact ground first when falling, so as to electronic control unit The stitch of 1 internal structure such as connector 5 avoids being damaged.In other embodiments, can also with third stabilizer blade 23 Second identical with 24 shape of the first buffer unit and material is set close to the position of connector 5 on opposite second side 2b2 Buffer unit replaces third stabilizer blade 23.Further, the second buffer unit is set to the line of two fixed protrusions 51 On the projection line with the edge-perpendicular of second side 2b2 on two side faces 2b2.

The utility model has been based on specific embodiment and is shown and described, but the utility model is not limited to figure In show and the details that is outlined above.On the contrary, in the situation without departing from the spirit and scope limited by appended claims It is lower that various modifications can be carried out or deformation.

Claims (10)

1. a kind of electronic control unit (1), which is characterized in that including：

Outer cover (2), the outer cover (2) include side wall (2b) and top surface (2a), the side wall (2b) and the top surface (2a) A receiving space (A) is formed, the side wall (2b) and the top surface (2a) define connected with the receiving space (A) One openend (2c)；The side wall (2b) defines and the receiving space (A) in the position opposite with the top surface (2a) The second openend (2d) of connection；

Printed circuit-board assembly (3), the printed circuit-board assembly (3) are fixed in the receiving space (A)；

Connector (5), the connector (5) connect with the printed circuit-board assembly (3), and the connector (5) is installed on institute State the first openend (2c)；

Back cover (4), the back cover (4) close second openend (2d)；

First buffer unit (24), first buffer unit (24) are disposed in proximity to the side of first openend (2c) On wall (2b), first buffer unit (24) extends from the side wall (2b) to the direction far from the receiving space (A)；

Second buffer unit, second buffer unit and first buffer unit (24) are oppositely disposed in close to described the On the side wall (2b) of one openend (2c) or on the back cover (4), second buffer unit by the side wall (2b) or The back cover (4) extends outwardly to the side far from the receiving space (A)；

First buffer unit (24) and second buffer unit are extended beyond to the direction far from the receiving space (A) The edge of the back cover (4).

2. electronic control unit (1) according to claim 1, which is characterized in that the side wall (2b) is including being oppositely arranged First side (2b1), second side (2b2) and the connection first side (2b1), the third side of second side (2b2) (2b3), the first side (2b1), second side (2b2) and top surface (2a) define first openend (2c)；Institute It states first side (2b1), second side (2b2) and third side (2b3) and defines second openend (2d)；Described first Buffer unit (24) is set in the first side (2b1), and close to the first side (2b1) in the described second opening Hold the edge of (2d).

3. electronic control unit (1) according to claim 2, which is characterized in that the connector (5) is including at least two Fixed protrusion (51), the fixed protrusion (51) and the location hole interference being arranged on the printed circuit-board assembly (3) The fixed connector (5) of connection and the printed circuit-board assembly (3), the line of two fixed protrusions (51) and institute It states first side (2b1) and the second side (2b2) is intersecting；First buffer unit (24) is set to two fixations Projection line with the edge-perpendicular of the first side (2b1) of the line of protrusion (51) in the first side (2b1) On.

4. electronic control unit (1) according to claim 3, which is characterized in that second buffer unit is set to described In second side (2b2), and close to the second side (2b2) at the edge of second openend (2d)；Described Two buffer units be set to the line of two fixed protrusions (51) in the second side (2b2) with described second On the projection line of the edge-perpendicular of side (2b2).

5. electronic control unit (1) according to claim 3, which is characterized in that the back cover (4) includes at least two Foot (21,22,23), the stabilizer blade (21,22,23) are connected to the back cover (4), and the stabilizer blade (21,22,23) is for being fixed on It installs on object；

Second buffer unit is the stabilizer blade (21,22,23), the stabilizer blade (21,22,23) and first buffer unit (24) it is oppositely disposed the corner close to first openend (2c) in the back cover (4).

6. electronic control unit (1) according to any one of claims 1 to 5, which is characterized in that first buffer unit (24) and second buffer unit (23) extends beyond the sides of the back cover (4) to the direction far from the receiving space (A) Edge at least 5mm.

7. electronic control unit (1) according to claim 6, which is characterized in that the outer cover (2) is made of plastics, institute The first buffer unit (24) is stated integrally to be molded together with the outer cover (2) with same material.

8. electronic control unit (1) according to claim 6, which is characterized in that first buffer unit (24) and institute The elastoplastic that state outer cover (2) has different rigidity by two kinds is formed, and the rigidity of the outer cover (2) is higher than first buffer part The rigidity of part (24).

9. electronic control unit (1) according to any one of claims 1 to 4, which is characterized in that second buffer unit (23) it is integrally molded together with the outer cover (2) with same material.

10. electronic control unit (1) according to claim 6, which is characterized in that first buffer unit (24) and institute At least part for stating the outer profile of the second buffer unit (23) is arc；First buffer unit (24), which further includes, to be extended to The lug boss (25) of the side wall (2b).