JP2009040209A - Vehicle sensor assembly - Google Patents

Abstract

A vehicle sensor assembly capable of suitably deforming a sensor element corresponding to a load at the time of a collision is provided.
A vehicle sensor assembly includes a first member provided in front of a vehicle body with respect to upper and lower sensor elements, and a second member disposed between the first member and the vehicle body. Member 15. The first member 14 has upper and lower load transmitting portions 36 and 37 bulged toward the upper and lower sensor elements 47 and 48. The second member 15 supports the upper and lower sensor elements 47 and 48. By positioning the first member 14 and the second member 15 relative to each other in the vertical direction by the positioning unit 30, the upper and lower load transmitting units 36 and 37 are opposed to the upper and lower sensor elements 47 and 48.
[Selection] Figure 3

Description

  The present invention relates to a vehicle sensor assembly that includes a sensor element in a vehicle body and outputs an electrical signal corresponding to a load in a direction orthogonal to a surface direction that acts on the sensor element.

Some vehicle sensor assemblies include an optical fiber as a sensor element for detecting the amount of displacement of the vehicle body. The optical fiber is sandwiched between a bumper reinforcement and a bumper cover.
When a load acts on the bumper cover, the load is transmitted to the optical fiber through the bumper cover, and the optical fiber is deformed by the transmitted load.
When the optical fiber is deformed, the amount of light passing through the optical fiber changes, and a collision is detected based on the changed amount of light (see, for example, Patent Document 1).
JP 2005-263038 A

Incidentally, in order to accurately detect a collision with the vehicle sensor assembly of Patent Document 1, it is necessary to suitably deform the optical fiber in accordance with the load at the time of the collision.
However, when the load at the time of collision is applied to a portion that is removed from the optical fiber, it is conceivable that the portion of the bumper cover that is removed from the optical fiber is deformed by the applied load.

When the deformed portion comes into contact with the bumper reinforcement, it is considered that the load is directly transmitted from the bumper cover to the bumper reinforcement, and the load is not efficiently transmitted to the optical fiber.
For this reason, it is difficult to suitably deform the optical fiber (that is, the sensor element) corresponding to the load at the time of collision.

  An object of the present invention is to provide a vehicle sensor assembly that can suitably deform a sensor element in accordance with a load at the time of a collision.

  The invention according to claim 1 is a vehicle sensor assembly including a sensor element that outputs an electric signal corresponding to a load input in a direction orthogonal to the surface direction, and A first member having a load transmitting portion provided in front and bulging toward the sensor element; and a second member disposed between the first member and the vehicle body and supporting the sensor element. The load transmitting portion is opposed to the sensor element by positioning the first member and the second member relative to each other in the vertical direction by a positioning portion.

  According to a second aspect of the present invention, an attachment portion for attaching the first member to the vehicle body is provided, and the attachment portion is configured to restrict only movement in a direction in which the first member and the vehicle body are separated from each other. It is characterized by.

  In Claim 3, the positioning part has a positioning hole in the second member, has an insertion part that can penetrate the positioning hole, and the insertion part penetrates the positioning hole, The first member and the second member are positioned relative to the vertical direction.

  In Claim 4, The said load transmission part is provided in at least one among the upper and lower parts of the said insertion part, It is characterized by the above-mentioned.

  In Claim 5, The said load transmission part is arrange | positioned between the said attaching part and the said insertion part, It is characterized by the above-mentioned.

  In Claim 6, The said load transmission part and the said sensor element are each provided in the upper and lower sides of the said insertion part, It is characterized by the above-mentioned.

  In Claim 7, The said positioning part is provided between the said attaching part and the said 2nd member, It is characterized by the above-mentioned.

In the invention according to claim 1, the first member is provided with the load transmitting portion, and the load transmitting portion is bulged toward the sensor element. And the load transmission part was made to oppose a sensor element by positioning the 1st member and the 2nd member relatively with a positioning part.
Therefore, for example, when a load at the time of a collision is applied, even if a portion of the first member that is detached from the sensor element is deformed, the applied load can be efficiently transmitted from the load transmission unit to the sensor element.
Accordingly, the collision can be accurately detected by suitably deforming the sensor element according to the load at the time of the collision.

In the invention according to claim 2, only the movement in the direction in which the first member and the vehicle body are separated from each other is restricted by the mounting portion.
Therefore, it is possible to prevent the first member from being detached from the vehicle body at the attachment portion.
On the other hand, when a load at the time of collision is applied to the first member, the first member can be smoothly moved toward the vehicle body by the applied load.
Thereby, the load at the time of a collision can be reliably transmitted to a sensor element by the load transmission part of a 1st member.

In the invention which concerns on Claim 3, the 1st member and the 2nd member were positioned relatively with respect to the up-down direction by penetrating the insertion part to the positioning hole. Therefore, the sensor element of the 2nd member can be made to oppose a load transmission part.
In this way, the sensor element of the second member can be made to face the load transmitting portion by a simple process that only passes through the insertion hole through the positioning hole.

In the invention which concerns on Claim 4, the load transmission part was provided in at least one among the upper and lower site | parts of the insertion part. Therefore, the load transmission part can be provided in the vicinity of the insertion part, and the load transmission part can be provided at a more accurate position with respect to the sensor element.
Thereby, a load transmission part can be made to oppose a sensor element still more reliably.

In the invention which concerns on Claim 5, the load transmission part was arrange | positioned between the attachment part and the insertion part. Therefore, when the load is applied, the load transmitting portion can be prevented from being displaced with respect to the sensor element by the mounting portion and the insertion portion.
Thereby, the load transmission part can be kept facing the sensor element, and the load at the time of collision can be more efficiently transmitted from the load transmission part to the sensor element.

In the invention which concerns on Claim 6, the load transmission part and the sensor element were distributed and provided in the upper and lower sides of the insertion part, respectively. Therefore, when a load is applied to the first member, the upper and lower load transmitting portions can be similarly guided to the upper and lower sensor elements by the insertion portion.
Each of the sensor elements can be similarly deformed by the upper and lower load transmitting portions by guiding the upper and lower load transmitting portions in the same manner.
Thereby, it is possible to detect the load caused by the collision more accurately without being affected by the load application location (input location).

In the invention which concerns on Claim 7, the positioning part was provided between the attaching part and the 2nd member.
Therefore, when attaching to a vehicle body, the position shift of a vehicle body and the 1st member 14, specifically, the position shift with the 1st member with respect to a 2nd member can be suppressed effectively.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a vehicle sensor assembly (first embodiment) according to the present invention, and FIG. 2 is an exploded perspective view showing the vehicle sensor assembly according to the first embodiment.
The vehicle sensor assembly 10 includes a front bumper beam (vehicle body) 13 attached to the left and right front side frames 11, 12, a first member 14 attached to the front bumper beam 13, and between the first member 14 and the front bumper beam 13. And a sensor element unit 16 supported by the second member 15.

The front bumper beam 13 is a member that constitutes a part of the vehicle body 18 by being attached to the front end portions 11 a and 12 a of the left and right front side frames 11 and 12.
The front bumper beam 13 is formed in a substantially sun-shaped cross section, and is provided at the central portion 21 extending in the vehicle body width direction, the left inclined portion 22 provided at the left end of the central portion 21, and the right end of the central portion 21. The right inclined part 23 is provided.

In the front wall 25 of the front bumper beam 13, a plurality of insertion holes 27 are formed at a predetermined interval at the center in the vertical direction.
Further, a plurality of upper locking holes 28 are formed at predetermined intervals in the vicinity of the upper side of the front wall 25 of the front bumper beam 13.
Furthermore, a plurality of lower locking holes 29 are formed at predetermined intervals in the vicinity of the lower side of the front wall 25 of the front bumper beam 13.

The first member 14 includes a belt-like beam cover 31 extending along the front wall 25 of the front bumper beam 13, and an insertion portion 33... And upper and lower attachment portions (attachment portions) 34. ... and upper and lower load transmission parts (load transmission parts) 36 and 37, respectively.
The insertion portion 33, the upper and lower attachment portions 34, 35, and the upper and lower load transmission portions 36, 37 will be described in detail with reference to FIGS.

The second member 15 is a belt-like member that is interposed between the first member 14 and the front bumper beam 13 and extends along the front wall 25 of the front bumper beam 13.
The second member 15 is bonded (supported) to the front wall 25 of the front bumper beam 13 with, for example, a double-sided adhesive tape (not shown).

In the second member 15, a plurality of positioning holes 41 are formed at predetermined intervals in the central portion in the vertical direction.
The second member 15 includes an upper projecting piece 42 on the upper side, a lower projecting piece 43 on the lower side, and a sensor support surface 44 between the upper and lower projecting pieces 42 and 43.

The upper projecting piece 42 is a part projecting from the upper side toward the front of the vehicle body. The lower projecting piece 43 is a part projecting from the lower side toward the front of the vehicle body.
The sensor support surface 44 is a surface that supports the sensor element unit 16.
The positioning hole 41 will be described in detail with reference to FIGS.

  The sensor element unit 16 includes a laminate 46 formed in a strip shape along the sensor support surface 44, a plurality of upper sensor elements (sensor elements) 47 embedded along the upper side of the laminate 46, and the lower side of the laminate 46. And a plurality of lower sensor elements (sensor elements) 48 embedded therein.

In the laminate 46, a plurality of fitting holes 51 are formed at predetermined intervals in the center portion in the vertical direction.
The upper and lower sensor elements 47 and 48 are band-like elements extending in the lateral direction.
The sensor element unit 16 is provided on the front bumper beam 13 via the second member 15 by being bonded (supported) to the sensor support surface 44 of the second member 15 with, for example, a double-sided adhesive tape (not shown). ing.

3 is a sectional view taken along line 3-3 in FIG. 1, and FIG. 4 is an exploded view of FIG.
In the second member 15, bosses 53 (see also FIG. 2) are formed at predetermined intervals in the center of the surface 15 b in the vertical direction, and positioning holes 41 are formed in the bosses 53, respectively. The plurality of positioning holes 41 are through holes.
A sensor support surface 44 is formed between the upper and lower projecting pieces 42 and 43 on the surface 15 b of the second member 15. The height dimension of the sensor support surface 44 is H1.

In the sensor element unit 16, the height dimension of the laminate 46 is set to H2. The height dimension H2 of the laminate 46 is set to be slightly smaller than the height dimension H1 of the sensor support surface 44.
An upper sensor element 47 is embedded in the vicinity of the upper side 46 a of the laminate 46. The upper sensor element 47 is provided on the upper side of the insertion portion 33.
A lower sensor element 48 is embedded in the vicinity of the lower side 46 b of the laminate 46. The lower sensor element 48 is provided below the insertion portion 33.

Piezoelectric films are used as the upper and lower sensor elements 47 and 48. That is, the upper and lower sensor elements 47 and 48 are distorted when a load in a direction orthogonal to the surface direction of each sensor element 47 and 48 is input (acted), and the generated distortion amount (input load) is increased. It is an element that outputs an electric signal correspondingly.
Thereby, an electric signal corresponding to the input (acting) load can be output.

Here, the fitting hole 51 of the laminate 46 is fitted to the boss 53 in a state where the sensor element unit 16 is bonded to the sensor support surface 44 with a double-sided adhesive tape (not shown).
Thereby, the sensor element unit 16 is positioned at a predetermined position by the plurality of bosses 53.
Further, the upper and lower sides 46 a and 46 b of the sensor element unit 16 are positioned at predetermined positions by the upper and lower projecting pieces 42 and 43.
Thereby, the sensor element unit 16 can be reliably positioned with respect to the second member 15 at a predetermined position.

The first member 14 is provided on the front side of the vehicle body of the sensor element unit 16.
The upper mounting portion 34 of the first member 14 is an elastically deformable locking member that extends toward the rear of the vehicle body from the vicinity of the upper side 31b on the back surface 31a of the beam cover 31.
The upper mounting portion 34 is provided with a locking claw 56 facing upward at the tip of the protruding piece 55.
The locking claw 56 is a part that prevents the protruding piece 55 from slipping out from the upper locking hole 28 toward the front of the vehicle body by locking to the periphery of the upper locking hole 28 of the front bumper beam 13.

  The lower attachment portion 35 of the first member 14 is a member that is vertically symmetrical with the upper attachment portion 34, and the same reference numerals are given to the respective constituent portions and the description thereof is omitted.

The upper load transmission portion 36 of the first member 14 is continuously formed on the back surface 31a of the beam cover 31 near the lower portion of the upper mounting portion 34 from the left end 31d to the right end 31e (see FIG. 2) of the beam cover 31. Has been.
The upper load transmission portion 36 is a bulging portion that bulges toward the rear of the vehicle body (that is, toward the upper sensor element 47), and is provided above the insertion portion 33.
Specifically, the upper load transmission portion 36 is disposed between the upper mounting portion 34 and the insertion portion 33.

The lower load transmission portion 37 of the first member 14 is a member that is vertically symmetrical with the upper load transmission portion 36, and is provided below the insertion portion 33.
Specifically, the lower load transmission portion 37 is disposed between the lower mounting portion 35 and the insertion portion 33.
Hereinafter, the same reference numerals as the constituent parts of the upper load transmitting part 36 are given to the constituent parts of the lower load transmitting part 37 and the description thereof is omitted.

The insertion portion 33 of the first member 14 is a columnar protrusion that extends from the center in the vertical direction toward the rear of the vehicle body on the back surface 31 a of the beam cover 31.
The insertion portion 33 is a member that can penetrate the positioning hole 41 of the second member 15 and can penetrate the insertion hole 27 of the front bumper beam 13.

By penetrating the insertion portion 33 into the positioning hole 41, the first member 14 and the second member 15 can be relatively positioned with respect to the vertical direction by the positioning portion 30.
Accordingly, the contact surface 36 a of the upper load transmission unit 36 can be opposed to the upper sensor element 47, and the contact surface 37 a of the lower load transmission unit 37 can be opposed to the lower sensor element 48.

  That is, the insertion part 33 of the first member 14 and the positioning hole 41 of the second member 15 constitute a positioning part 30 for positioning the upper and lower load transmission parts 36 and 37 and the upper and lower sensor elements 47 and 48. Yes.

Here, in the first member 14, upper and lower load transmitting portions 36 and 37 are provided at upper and lower portions of the insertion portion 33, respectively. Therefore, the upper and lower load transmission portions 36 and 37 can be provided in the vicinity of the insertion portion 33, and the upper and lower load transmission portions 36 and 37 are provided at more accurate positions with respect to the upper and lower sensor elements 47 and 48. Can do.
As a result, the upper and lower load transmitting portions 36 and 37 can be more reliably opposed to the upper and lower sensor elements 47 and 48.

In addition, the upper load transmission portion 36 is disposed between the upper attachment portion 34 and the insertion portion 33, and the lower load transmission portion 37 is disposed between the lower attachment portion 35 and the insertion portion 33.
Therefore, the upper mounting portion 34 and the insertion portion 33 can prevent the upper load transmitting portion 36 from being displaced with respect to the upper sensor element 47 when a load is applied.
Similarly, the lower mounting portion 35 and the insertion portion 33 can prevent the lower load transmission portion 37 from being displaced with respect to the lower sensor element 48.
Thus, the upper and lower load transmitting portions 36 and 37 are kept facing the upper and lower sensor elements 47 and 48, respectively, and the load at the time of collision is transferred from the upper and lower load transmitting portions 36 and 37 to the upper and lower sensor elements 47 and 48. Can communicate more efficiently.

The procedure for assembling the vehicle sensor assembly 10 will be described with reference to FIGS.
First, the sensor element unit 16 is bonded (supported) to the sensor support surface 44 of the second member 15 with a double-sided adhesive tape (not shown).
Next, the second member 15 is bonded to the front wall 25 of the front bumper beam 13 with a double-sided adhesive tape (not shown).

Next, the insertion part 33 of the first member 14 is penetrated through the positioning hole 41 of the second member 15 and also through the insertion hole 27 of the front bumper beam 13.
By passing the insertion portion 33 through the positioning hole 41, the contact surface 36 a of the upper load transmission portion 36 faces the upper sensor element 47 and the contact surface 37 a of the lower load transmission portion 37 faces the lower sensor element 48. opposite.
As described above, the upper and lower sensor elements 47 and 48 provided on the second member 15 can be made to face the upper and lower load transmitting portions 36 and 37 by a simple process of simply penetrating the insertion portion 33 through the positioning hole 41. .

At the same time as inserting the insertion portion 33 through the positioning hole 41 and the insertion hole 27, the upper and lower attachment portions 34 and 35 are inserted into the upper and lower locking holes 28 and 29 of the front bumper beam 13, respectively.
The locking claw 56 of the upper mounting portion 34 comes into contact with the upper locking hole 28, and the upper mounting portion 34 is inserted into the upper locking hole 28 while being elastically deformed.
Similarly, the locking claw 56 of the lower mounting portion 35 contacts the lower locking hole 29, and the lower mounting portion 35 is inserted into the lower locking hole 29 while being elastically deformed.

After the insertion of the upper and lower attachment portions 34 and 35 is completed, the upper and lower attachment portions 34 and 35 are returned from the elastically deformed state. The locking claws 56 and 56 of the upper and lower mounting portions 34 and 35 are locked to the peripheral edges of the upper and lower locking holes 28 and 29, respectively.
Thereby, the first member 14 is attached to the front wall 25 of the front bumper beam 13.
In this state, the contact surface 36a of the upper load transmission unit 36 and the contact surface 37a of the lower load transmission unit 37 are bonded to the sensor element unit 16 with a double-sided adhesive tape or an adhesive (not shown).

By the way, the locking claw 56 of the upper mounting portion 34 is locked to the peripheral edge of the upper locking hole 28, and the locking claw 56 of the lower mounting portion 35 is locked to the peripheral edge of the lower locking hole 29. The attachment portions 34 and 35 (that is, the first member 14) can be prevented from slipping out from the upper and lower locking holes 28 and 29 to the front side of the vehicle body.
On the other hand, movement of the upper and lower attachment portions 34 and 35 (that is, the first member 14) to the rear side of the vehicle body is not restricted by the locking claws 56.

That is, the upper and lower mounting portions 34 and 35 are configured to restrict only the movement in the direction in which the first member 14 and the front bumper beam 13 are separated (that is, the front of the first member 14 in the vehicle body).
Therefore, the upper and lower mounting portions 34 and 35 can prevent the first member 14 from coming off the vehicle body 18.
On the other hand, when a load at the time of collision is applied to the first member 14, the first member 14 can be smoothly moved toward the vehicle body 18 with the applied load.
Thereby, the load at the time of collision can be reliably transmitted to the upper and lower sensor elements 47 and 48 by the upper and lower load transmitting portions 36 and 37 provided on the first member 14.

Next, the operation of the vehicle sensor assembly 10 will be described with reference to FIG.
FIG. 5 is a view for explaining an example in which a load acts on the first member of the vehicle sensor assembly according to the first embodiment.
A load F1 acts on the first member 14 from the front side of the vehicle body as shown by an arrow. The load F1 is a load in a direction orthogonal to the surface direction of the upper and lower sensor elements 47 and 48.
Here, the contact surface 36 a of the upper load transmission portion 36 and the contact surface 37 a of the lower load transmission portion 37 are in contact with the sensor element unit 16.
A part of the load F1 is transmitted to the upper load transmission portion 36 as indicated by an arrow A as the load F2. On the other hand, the remainder of the load F1 is transmitted to the lower load transmission portion 37 as indicated by an arrow B as the load F3.

The contact surface 36 a of the upper load transmitting portion 36 faces the upper sensor element 47. Further, the contact surface 37 a of the lower load transmitting portion 37 faces the lower sensor element 48.
Therefore, the upper sensor element 47 can be favorably pressed by the load F2 transmitted to the upper load transmission unit 36.
Similarly, the lower sensor element 48 can be favorably pressed by the load F3 transmitted to the lower load transmitting portion 37.
Thereby, the load F1 can be made to act on the upper and lower sensor elements 47 and 48 efficiently.

Therefore, for example, when a load F1 at the time of a collision is applied, even if a portion of the first member 14 that is detached from the upper and lower sensor elements 47 and 48 is deformed, the applied load F1 is transferred to the upper and lower load transmitting portions 36 , 37 can be efficiently transmitted to the upper and lower sensor elements 47, 48.
As a result, the upper and lower sensor elements 47 and 48 are suitably deformed in accordance with the load F1 at the time of the collision, so that the collision can be accurately detected.

  In addition, the upper and lower load transmitting portions 36 and 37 and the upper and lower sensor elements 47 and 48 are provided separately above and below the insertion portion 33. Therefore, when the load F1 is applied to the first member 14, the upper and lower load transmitting portions 36 and 37 can be similarly guided to the upper and lower sensor elements 47 and 48 by the insertion portion 33.

By similarly guiding the upper and lower load transmitting portions 36 and 37, the upper and lower load transmitting portions 36 and 37 can similarly deform the sensor elements 47 and 48, respectively.
As a result, the load caused by the collision can be detected more accurately without being affected by the application location (input location) of the load F1.

Here, in order to concentrate the load when a load is applied, the upper and lower load transmitting portions 36 and 37 and the upper and lower sensor elements 47 and 48 are preferably narrow in the vertical direction.
On the other hand, if the upper and lower load transmitting portions 36 and 37 and the upper and lower sensor elements 47 and 48 are narrowed in the vertical direction, it is difficult to position the upper and lower load transmitting portions 36 and 37 on the upper and lower sensor elements 47 and 48. .
Therefore, by providing the positioning portion 30, the upper and lower load transmission portions 36 and 37 and the upper and lower sensor elements 47 and 48 are narrowed in the vertical direction, and the upper and lower load transmission portions 36 and 37 are changed to the upper and lower sensor elements 47. , 48 can be reliably positioned.

  Next, vehicle sensor assemblies according to second to third embodiments will be described with reference to FIGS. In the second to third embodiments, the same components as those of the vehicle sensor assembly 10 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

(Second Embodiment)
FIG. 6 is a sectional view showing a vehicle sensor assembly (second embodiment) according to the present invention, and FIG. 7 is an exploded view of FIG.
The vehicle sensor assembly 70 includes a positioning portion 71 and a mounting portion 72 instead of the positioning portion 30 and the upper and lower mounting portions 34 and 35, and the other configurations are the vehicle sensor assembly of the first embodiment. 10 is the same.

  The positioning part 71 includes a positioning hole 75 formed in the boss 74 of the second member 15 and an insertion part 76 provided on the back surface 31 a of the first member 14.

The boss 74 is formed at a predetermined interval at the center in the vertical direction of the surface 15b of the second member 15 in the same manner as the boss 53 of the first embodiment.
A positioning hole 75 is coaxially formed in the boss 74.

The insertion portion 76 is a cylindrical protrusion that extends from the center in the vertical direction toward the rear of the vehicle body on the back surface 31 a of the beam cover 31.
The insertion portion 76 is a member that can penetrate the positioning hole 75 of the second member 15 and can penetrate the insertion hole 77 of the front bumper beam 13.

By penetrating the insertion portion 76 through the positioning hole 75, the first member 14 and the second member 15 can be positioned relative to the vertical direction by the positioning portion 71.
Accordingly, the contact surface 36 a of the upper load transmission unit 36 can be opposed to the upper sensor element 47, and the contact surface 37 a of the lower load transmission unit 37 can be opposed to the lower sensor element 48.

  The attachment portion 72 includes an attachment hole 81 formed coaxially with the insertion portion 76, a bolt 82 that can be inserted into the attachment hole 81, and a nut 83 provided on the front bumper beam 13.

A plurality of mounting holes 81 are formed at a central portion in the vertical direction of the first member 14 at a predetermined interval in the vehicle body width direction.
As the bolt 82, a hexagon socket head cap screw having a hexagon socket (not shown) formed in a cylindrical head 82a is used.
The nut 83 is welded to the back surface 25 a of the front wall 25 of the front bumper beam 13 in a state of being arranged coaxially with the insertion hole 77.

Here, the procedure for assembling the vehicle sensor assembly 70 will be described.
First, the sensor element unit 16 is bonded (supported) to the sensor support surface 44 of the second member 15 with a double-sided adhesive tape (not shown).
Next, the second member 15 is bonded to the front wall 25 of the front bumper beam 13 with a double-sided adhesive tape (not shown).

Next, the insertion portion 76 of the first member 14 is passed through the positioning hole 75 of the second member 15 and is inserted into the insertion hole 77 of the front bumper beam 13.
By passing the insertion part 76 through the positioning hole 75, the contact surface 36 a of the upper load transmission part 36 faces the upper sensor element 47 and the contact surface 37 a of the lower load transmission part 37 faces the lower sensor element 48. opposite.

The bolt 82 is inserted into the mounting hole 81 in a state where the insertion portion 76 is passed through the positioning hole 75.
The screw portion 82 b of the bolt 82 protruding from the mounting hole 81 is screwed to the nut 83. The first member 14 is attached to the front wall 25 of the front bumper beam 13 by the cylindrical head 82 a of the bolt 82 contacting the stepped portion 81 a of the attachment hole 81.
In this state, the contact surface 36a of the upper load transmission unit 36 and the contact surface 37a of the lower load transmission unit 37 are bonded to the sensor element unit 16 with a double-sided adhesive tape or an adhesive (not shown).

By the way, the screw 82 b of the bolt 82 is screwed to the nut 83. In addition, the cylindrical head 82 a of the bolt 82 is in contact with the stepped portion 81 a of the mounting hole 81.
Therefore, it is possible to prevent the first member 14 from moving to the front side of the vehicle body.
On the other hand, the movement of the first member 14 to the rear side of the vehicle body is not restricted.

  That is, the first member 14 is configured to restrict only the movement in the direction away from the front bumper beam 13 (that is, the front of the first member 14 in the vehicle body).

According to the vehicle sensor assembly 70 of the second embodiment, the insertion portion 76 of the positioning portion 71 is inserted between the bolt 82 of the mounting portion 72 and the boss 74 of the second member 15 (provided). ing).
Therefore, the positional deviation between the vehicle body and the first member 14, specifically the positional deviation between the first member 14 relative to the second member 15, can be effectively suppressed during attachment to the vehicle body.

  Furthermore, according to the vehicle sensor assembly 70 of the second embodiment, the same effects as those of the vehicle sensor assembly 10 of the first embodiment can be obtained.

(Third embodiment)
FIG. 8 is a sectional view showing a vehicle sensor assembly (third embodiment) according to the present invention, and FIG. 9 is an exploded view of FIG.
The vehicle sensor assembly 90 includes a positioning portion 91 and a mounting portion 92 in place of the positioning portion 30 and the upper and lower mounting portions 34 and 35, and the other configuration is the vehicle sensor assembly of the first embodiment. 10 is the same.

  The positioning portion 91 includes a mounting hole 98 formed in the beam cover 31 of the first member 14, a positioning hole 95 formed in the boss 94 of the second member 15, and a bolt (insertion) that can be inserted into the positioning hole 95. Part) 96.

The attachment holes 98 are formed in the center of the beam cover 31 in the vertical direction with a predetermined interval in the vehicle width direction.
The mounting hole 98 has a wall surface 98a formed in a tapered shape by sequentially reducing the hole diameter toward the rear of the vehicle body.

The boss 94 is formed at a predetermined interval at the center in the vertical direction of the surface 15b of the second member 15 in the same manner as the boss 53 of the first embodiment.
A positioning hole 95 is coaxially formed in the boss 94.

As the bolt 96, a hexagon socket head bolt in which a hexagon socket (not shown) is formed in the countersunk head 96a is used.
The bolt 96 is a member that can penetrate the positioning hole 95 of the second member 15 and can penetrate the insertion hole 97 of the front bumper beam 13.

By inserting the bolt 96 into the mounting hole 98, the countersunk head 96 a of the bolt 96 comes into contact with the tapered wall surface 98 a of the mounting hole 98. The mounting hole 98 (that is, the first member 14) is positioned by the countersunk head 96a.
Further, by passing the bolt 96 through the positioning hole 95, the neck lower part 96 b of the bolt 96 is inserted into the positioning hole 95. The positioning hole 95 (that is, the second member 15) is positioned by the neck lower portion 96b.

Therefore, the first member 14 and the second member 15 can be relatively positioned with respect to the vertical direction by the bolt 96.
Accordingly, the contact surface 36 a of the upper load transmission unit 36 can be opposed to the upper sensor element 47, and the contact surface 37 a of the lower load transmission unit 37 can be opposed to the lower sensor element 48.

The mounting portion 92 includes a mounting hole 98 formed in the beam cover 31 of the first member 14, a bolt 96 that can be locked in the mounting hole 98, and a nut 103 provided in the front bumper beam 13.
That is, the attachment hole 98 serves as both a part of the attachment part 92 and a part of the positioning part 91.
In addition, the bolt 96 is a member that serves as both a part of the attachment part 92 and a part of the positioning part 91.

  The nut 103 is welded to the back surface 25 a of the front wall 25 of the front bumper beam 13 in a state of being arranged coaxially with the insertion hole 97.

Here, the procedure for assembling the vehicle sensor assembly 90 will be described.
First, the sensor element unit 16 is bonded (supported) to the sensor support surface 44 of the second member 15 with a double-sided adhesive tape (not shown).
Next, the second member 15 is bonded to the front wall 25 of the front bumper beam 13 with a double-sided adhesive tape (not shown).

Next, the bolt 96 is inserted into the mounting hole 98 of the first member 14. The bolt 96 protruding from the mounting hole 98 is passed through the positioning hole 95 of the second member 15 and is also passed through the insertion hole 97 of the front bumper beam 13.
The bolt 96 is positioned with respect to the second member 15 by inserting the neck lower portion 96 b of the bolt 96 into the positioning hole 95.

The thread portion 96 c of the bolt 96 protruding from the insertion hole 97 is screwed to the nut 103. The countersunk head 96 a of the bolt 96 abuts against the tapered wall surface 98 a of the mounting hole 98 to position the first member 14 and attach it to the front wall 25 of the front bumper beam 13.
The contact surface 36a of the upper load transmission portion 36 faces the upper sensor element 47, and the contact surface 37a of the lower load transmission portion 37 faces the lower sensor element 48.

In this state, the contact surface 36a of the upper load transmission unit 36 and the contact surface 37a of the lower load transmission unit 37 are bonded to the sensor element unit 16 with a double-sided adhesive tape or an adhesive (not shown).
In this state, it is preferable that the countersunk head 96 a of the bolt 96 contacts the boss 94.

By the way, the bolt 96 has a thread portion 96 b screw-coupled to the nut 103. In addition, the countersunk head 96 a of the bolt 96 is in contact with the tapered wall surface 98 a of the mounting hole 98.
Therefore, it is possible to prevent the first member 14 from moving to the front side of the vehicle body.
On the other hand, the movement of the first member 14 to the rear side of the vehicle body is not restricted.

  That is, the first member 14 is configured to restrict only the movement in the direction away from the front bumper beam 13 (that is, the front of the first member 14 in the vehicle body).

According to the vehicle sensor assembly 90 of the third embodiment, the insertion portion of the positioning portion 91 can be shared by the bolt 96 of the attachment portion 92.
Therefore, since it is not necessary to form a positioning insertion portion in the beam cover 31 of the first member 14, the shape of the first member 14 can be simplified.

  Furthermore, according to the vehicle sensor assembly 90 of the third embodiment, the same effects as those of the vehicle sensor assemblies 10 and 70 of the first and second embodiments can be obtained.

In the above embodiment, the example in which the upper and lower load transmitting portions 36 and 37 are provided in the upper and lower portions of the insertion portion 33 has been described. However, the load transmission portion is provided only in one of the upper and lower portions of the insertion portion 33. It is also possible to provide it.
In this case, it is only necessary to provide the sensor element only at a portion facing the load transmitting portion.

  Moreover, in the said embodiment, although the piezoelectric film was illustrated as the upper and lower sensor elements 47 and 48, not only this but another sensor element can also be used.

  Furthermore, although the front bumper beam 13 is illustrated as the vehicle body 18 in the above-described embodiment, the vehicle body 18 may be other parts such as a rear bumper beam, without being limited thereto.

  Moreover, although the said embodiment demonstrated the example which adhere | attached the 2nd member 15 on the front wall 25 of the front bumper beam 13 only with the double-sided adhesive tape, it is not restricted to this, An adhesive agent is used in addition to a double-sided adhesive tape. It is also possible to use only an adhesive.

  The present invention is suitable for application to an automobile equipped with a vehicle sensor assembly that outputs an electrical signal corresponding to a load applied to a sensor element.

1 is a perspective view showing a vehicle sensor assembly (first embodiment) according to the present invention. It is a disassembled perspective view which shows the vehicle sensor assembly which concerns on 1st Embodiment. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is an exploded view of FIG. 3. It is a figure explaining the example which the load acted on the 1st member of the sensor assembly for vehicles concerning a 1st embodiment. It is sectional drawing which shows the vehicle sensor assembly (2nd Embodiment) based on this invention. FIG. 7 is an exploded view of FIG. 6. It is sectional drawing which shows the vehicle sensor assembly (3rd Embodiment) based on this invention. FIG. 9 is an exploded view of FIG. 8.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,70,90 ... Vehicle sensor assembly, 14 ... 1st member, 15 ... 2nd member, 18 ... Vehicle body, 30, 71, 91 ... Positioning part, 33, 76 ... Insertion part, 34 ... Upper attachment part ( Mounting part), 35 ... lower mounting part (mounting part), 36 ... upper load transmission part (load transmission part), 37 ... lower load transmission part (load transmission part), 41, 75, 95 ... positioning hole, 47 ... Upper sensor element (sensor element), 48 ... lower sensor element (sensor element), 72 ... mounting part, 92 ... mounting part, 96 ... bolt (insertion part), F1 ... load.

Claims (7)

A vehicle sensor assembly including a sensor element that outputs an electrical signal corresponding to a load input in a direction orthogonal to a surface direction,
A first member provided in front of the vehicle body with respect to the sensor element, and having a load transmitting portion bulged toward the sensor element;
A second member disposed between the first member and the vehicle body and supporting the sensor element;
With
A vehicle sensor assembly, wherein the load transmitting portion is opposed to the sensor element by positioning the first member and the second member relative to each other in a vertical direction by a positioning portion. An attachment portion for attaching the first member to the vehicle body;
The vehicle sensor assembly according to claim 1, wherein the attachment portion is configured to restrict movement only in a direction in which the first member and the vehicle body are separated from each other. The positioning part is
A positioning hole in the second member;
An insertion portion that can penetrate the positioning hole;
3. The vehicle according to claim 1, wherein the first member and the second member are relatively positioned with respect to a vertical direction when the insertion portion penetrates the positioning hole. Sensor assembly.   4. The vehicle sensor assembly according to claim 3, wherein the load transmitting portion is provided in at least one of upper and lower portions of the insertion portion.   5. The vehicle sensor assembly according to claim 3, wherein the load transmission portion is disposed between the attachment portion and the insertion portion.   The vehicle sensor assembly according to claim 1, wherein the load transmitting portion and the sensor element are provided above and below the insertion portion, respectively.   The vehicle sensor assembly according to any one of claims 1 to 6, wherein the positioning portion is provided between the attachment portion and the second member.

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