JP2004176426A - Pressure-sensitive sensor structure for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove the greater part of an opening between the corner of a body and the angular section of a tail gate, to transmit an external force generated by the holding of a small foreign substance to a sensor for detecting pressure through a projecting section even when the foreign substance is held between the body and the angular section of the tail gate, to prevent the deterioration of the accuracy of the pressure detection of the sensor because the radius of the circular arc of the sensor may not be reduced due to the presence of the projecting section and to improve the accuracy of the detection of the holding of the foreign substance between the body and the angular section of the tail gate. <P>SOLUTION: The pressure-sensitive sensor for the door is constituted so that a weather strip 21 closing the opening with the body 18 side is installed around the tail gate, and the projecting section 41 transmitting the external force to the sensor 37 for detecting pressure buried in the weather strip 21 is formed to an angular door sealing section 33 corresponding to the angular section of the tail gate of the weather strip 21. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door pressure-sensitive sensor structure having improved detection accuracy of a foreign object trapped between a body and a door.
[0002]
[Prior art]
As a door pressure-sensitive sensor structure, a structure in which a pressure-sensitive sensor is provided along a longitudinal direction of a seal member is known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2000-25460 (page 2, FIG. 3, FIG. 4)
[0004]
FIG. 4 of Patent Document 1 will be described with reference to FIG. The reference numerals have been re-assigned.
FIG. 8 is a side view showing a conventional door pressure-sensitive sensor structure, in which a glass run 102 as a seal member is mounted on a sash 101, and a pressure-sensitive sensor 104 is mounted on a portion 104 mounted on a sash front portion 103 of the glass run 102. 5 shows a door provided with 105; Reference numerals 106 and 107 denote lead wires having one end connected to the pressure-sensitive sensor 105, and reference numeral 108 denotes a controller connected to the other end of each of the lead wires 106 and 107.
[0005]
FIG. 3 of Patent Document 1 will be described with reference to FIG. 9 below.
FIG. 9 is a cross-sectional view showing a conventional pressure-sensitive sensor structure for a door, and is a cross-sectional view of a front side portion 103 of a sash 102 (see FIG. 8).
The pressure-sensitive sensor 105 is a rod-shaped member having a pair of electrodes 111, 111, and is housed in a sensor housing 112 of the glass run 102. Reference numeral 113 denotes a door window glass.
When an external force acts on the pressure-sensitive sensor 105, for example, the distance between the electrodes 111 changes, the capacitance changes, and an electric signal is generated.
[0006]
[Problems to be solved by the invention]
In FIG. 8, since the pressure-sensitive sensor 105 is not disposed at the corner of the sash 101, for example, when a foreign object is interposed between the corner of the sash 101 and the door window glass 113, the foreign object is interposed. Not detectable.
[0007]
In order to store the pressure sensor 105 in the glass run 102 at the corner of the sash 102, the pressure sensor 105 must be bent at an angle of about 90 °.
[0008]
Since the pressure-sensitive sensor 105 requires a predetermined interval between the electrodes 111, 111, the outer diameter increases. Therefore, when the pressure-sensitive sensor 105 is bent, an arc shape is formed, and a gap is formed between the arc portion and the sash 102 side or the door window glass 113 side, so that small foreign matter cannot be detected.
Further, by bending the pressure-sensitive sensor 105, the rigidity of the electrodes 111, 111 is increased, the distance between the electrodes 111, 111 is hardly changed, and the pressure detection accuracy of the pressure-sensitive sensor 105 itself is reduced.
[0009]
It is an object of the present invention to improve the detection accuracy of a foreign object trapped between a body and a door by improving a structure of a pressure-sensitive sensor for a door.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention is to provide a seal member for closing a gap between the door and the body side around the door, and a pressure detection embedded in the seal member at a corner corresponding to the corner of the door of the seal member. A sensor is provided with a pressing member for transmitting an external force.
[0011]
By providing the pressing member at the corner of the seal member, the gap between the corner of the body and the pressing member provided at the corner of the door can be almost eliminated, and a small foreign substance is provided between the body and the corner of the door. Even when the pressure sensor is pinched, the external force generated by the pinching of the foreign matter can be transmitted to the pressure detecting sensor via the pressing member, and the pressing member does not need to reduce the radius of the arc portion of the pressure detecting sensor. Therefore, it is possible to prevent a decrease in the pressure detection accuracy of the pressure detection sensor, and it is possible to enhance the detection accuracy of the foreign object trapping between the body and the corner of the door.
[0012]
Claim 2 is that the part other than the corner part of the seal member is extruded and molded, the corner part is separated from the part other than the corner part, and is molded and joined to the part other than the corner part, and provided at the corner part. A pressure detection sensor is inserted into the corner from the slit.
[0013]
By separating the corners of the seal member from the portions other than the corners, the pressure for arranging the pressure detection sensor provided at the corners at the portions other than the corners of the seal member so that the pressure detection sensor is suitable for the pressure detection state. It can be selected separately from the detection sensor, and the pressure detection sensitivity at the corner of the seal member can be increased.
[0014]
A third aspect of the present invention is characterized in that a die-shaped pressing member is joined to a corner of the extruded sealing member.
The seal member and the pressure detection sensor are formed by integrally molding the corner portion and the portion other than the corner portion of the seal member, and integrating the pressure detection sensor disposed at the corner portion and the portion other than the corner portion of the seal member. Cost increase can be suppressed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals.
FIG. 1 is a rear side view of a vehicle employing a door pressure-sensitive sensor structure according to the present invention, and shows that a rear gate 11 as an automatic opening / closing door is provided at a rear portion of a vehicle 10. Reference numeral 13 denotes a rear seat door, 14 denotes a rear quarter glass, 15 denotes a rear wheel, and 16 denotes a rear bumper.
[0016]
The tailgate 11 can be automatically opened and closed by a driver operating a switch at hand, and the imaginary line in the figure shows a state in which the tailgate 11 is flipped up to a fully open position.
[0017]
If the tailgate 11 touches an obstacle while the tailgate 11 is being opened or closed, the operation is instantaneously switched to the opposite operation. That is, the operation is a closing operation during the opening and an opening operation during the closing.
[0018]
When a foreign object is caught between the body and the tail gate 11 when the tail gate 11 is closed, the operation of opening the tail gate 11 is detected by the door pressure-sensitive sensor structure of the present invention. Switch to.
[0019]
FIG. 2 is a rear view of the vehicle 10 as viewed in the direction of arrow 2 in FIG.
The tailgate 11 is provided with a weather strip 21 as a sealing member almost all around the inside of the edge portion on the vehicle cabin side in order to maintain airtightness between the tailgate 11 and the pressure sensor described later. Embedded sensor. In addition, 22 is a rear window glass, and 23 and 23 are tail lamps.
[0020]
3A and 3B are explanatory views showing the structure of the door pressure-sensitive sensor according to the present invention. FIG. 3A is a view of part A of FIG. 2 viewed from the vehicle interior (however, left and right are reversed), and FIG. 3A is a cross-sectional view taken along line bb of FIG. 3A, and FIG. 3C is a cross-sectional view taken along line cc of FIG.
2A shows a positional relationship between the body 18 and the weather strip 21 when the tailgate 11 (see FIG. 2) is closed.
[0021]
The weather strip 21 includes a vertical door seal portion 31 attached to left and right edges of the tailgate 11, a horizontal door seal portion 32 attached to upper and lower edges of the tailgate 11, and a corner 11a of the tailgate 11 (FIG. 1). ) And a square door seal part 33 joined to the vertical door seal part 31 and the horizontal door seal part 32.
The corner door seal part 33 is a corner part of the seal member described in claim 1, and the vertical door seal part 31 and the horizontal door seal part 32 are parts other than the corner part of the seal member described in claim 2.
[0022]
The vertical door seal portion 31 and the horizontal door seal portion 32 are formed by extrusion molding, and have embedded pressure detection sensors 35 and 36, respectively.
The square door seal portion 33 includes an arc-shaped main body portion 38 for accommodating the pressure detection sensor 37, and a protruding portion 41 as a pressing member integrally formed outside the main body portion 38. This is a part arranged so as to almost fill the space between the body 18 and the main body 38, and is a part employing the door pressure-sensitive sensor structure of the present invention. Reference numeral 43 denotes a sensor insertion slit for inserting the pressure detection sensor 37 into the main body 38.
[0023]
In (b), the vertical door seal portion 31 includes a fitting portion 31a fitted to a fitting portion 11d in which an outer panel 11b constituting the tail gate 11 and an inner panel 11c provided inside the outer panel 11b are fitted, and the fitting portion 31a. The sensor housing 31b is formed integrally with the sensor housing 31b.
[0024]
The fitting portion 31a includes inner lip portions 31c projecting inward and a U-shaped hollow portion 31d formed in a U-shaped cross section.
The sensor housing portion 31b is a housing in which the pressure detecting sensor 35 is housed in the cylindrical hollow portion 31e, and has an outer lip portion 31f on its outer surface which obtains sealing properties by being pressed against the body 18 (see FIG. 3A). Is provided.
[0025]
The pressure detection sensor 35 includes an elastic material, for example, a rubber core material 45, and electrodes 46 and 47 having arc-shaped cross sections provided so as to face the outer surface of the core material 45. When an external force is applied from the left side, the one electrode 46 side is pressed and approaches the electrode 47, and if the distance between the electrodes 46 and 47 changes and the capacitance between the electrodes 46 and 47 changes, By extracting the change in the capacitance as an electric signal, it is possible to detect that an external force has acted on the vertical door seal portion 31. The horizontal door seal 32 (see FIG. 3A) and the pressure detection sensor 36 (see FIG. 3A) have the same structure as the above-described vertical door seal 31 and the pressure detection sensor 35. Description is omitted.
[0026]
In (c), the square door seal portion 33 includes a swelling portion 33a, a sensor storage portion 33b provided integrally with the swelling portion 33a, and the above-described projection portion 41 provided integrally outside the sensor storage portion 33b. Consists of
[0027]
The sensor accommodating portion 33b accommodates the pressure detecting sensor 37 in the hollow portion 33e having a circular cross section, and has a seal 51 covering the sensor insertion slit 43 attached to an outer surface thereof.
[0028]
The pressure detecting sensor 37 includes a rubber core 52 and electrodes 53 and 54 having arc-shaped cross sections provided to face the outer surface of the core 52, and the pressure detecting sensors 35 and 36 (FIG. 3A). (See Reference).
[0029]
The protruding portion 41 includes a base portion 41a having a substantially triangular shape (see FIG. 3A), an outer rib 41b formed to be raised from an edge of the base portion 41a, and an inner rib 41c formed to be raised inside the outer rib 41b. The inner rib 41c increases the rigidity of the base 41a and the outer rib 41b. Reference numeral 41d denotes a tip lip formed at the tip of the outer rib 41b, and a sealing property is obtained by pressing against the body 18 (see FIG. 3A).
[0030]
Next, the procedure for assembling the weather strip 21 described above will be described.
FIGS. 4 (a) and 4 (b) are action diagrams showing the procedure for assembling the weather strip according to the present invention.
In (a), the end surfaces of the vertical door seal portion 31 and the horizontal door seal portion 32 are respectively joined to the square door seal portion 33 with an adhesive or the like.
[0031]
In (b), the sensor 37 for pressure detection is inserted into the sensor accommodating part 33b from the sensor insertion slit 43 of the square door seal part 33.
Then, the weather strip 21 is attached to the inner edge of the tailgate. This completes the assembly of the weather strip 21 and the attachment to the tailgate.
[0032]
The operation of the weather strip 21 described above will now be described.
FIGS. 5A to 5C are operation diagrams showing the operation of the weather strip.
In the embodiment shown in (a) (this embodiment), when closing the tailgate, if foreign matter 58 is sandwiched between the corner of the opening of the body 18 and the corner of the tailgate, the corner door seal 33 protrudes. The portion 41 is bent, and the external force received by the projecting portion 41 is transmitted to the pressure detecting sensor 37.
[0033]
In the embodiment (this embodiment) shown in (b), when an external force is transmitted to the pressure detection sensor 37, the pressure detection sensor 37 is crushed in the direction of the arrow, and the distance between the electrodes 53 and 54 is reduced. The capacitance changes.
[0034]
This change in capacitance is sent as an electric signal to the control unit, which determines from the electric signal that the tailgate has trapped foreign matter and reverses the motor that drives the tailgate to open the tailgate. To control.
[0035]
The comparative example shown in (c) shows a vehicle in which a weather strip 122 in which a pressure detection sensor 121 is embedded is attached to a tailgate. In this vehicle, when the tailgate is closed, the opening of a body 123 is closed. Even if the foreign matter 124 is sandwiched between the corner and the corner of the tailgate, the pressure detection sensor 121 cannot detect the foreign matter being sandwiched because the diameter of the foreign matter 124 is small.
[0036]
When a foreign substance 125 having a diameter larger than that of the foreign substance 124 is sandwiched, an external force acts on the pressure detecting sensor 121, and the pressure detecting sensor 121 can detect the foreign substance 125 being sandwiched.
On the other hand, in the embodiment of (a), even a small foreign matter 58 can be detected, and the detection accuracy of the foreign matter is high.
[0037]
6A and 6B are explanatory views showing another embodiment of the pressure-sensitive sensor structure for a door according to the present invention, wherein FIG. 6A is a view as viewed from the vehicle interior, and FIG. 6B is a cross-sectional view taken along line bb of FIG. FIG. 3C is a cross-sectional view taken along line cc of FIG.
2A shows a positional relationship between the body 18 and a weather strip 61 as a sealing member when the tailgate 11 (see FIG. 1) is closed.
[0038]
The weather strip 61 embeds the pressure detection sensor 35 in a rubber extruded material 61A attached to the upper, lower, left, and right edges of the tailgate 11, and has a bent portion 61a as a corner of the extruded material 61A, It is formed by joining a protruding piece 62 as a molded rubber pressing member.
[0039]
In (b), the weather strip 61 includes a fitting portion 61b fitted into a fitting portion 11d in which the outer panel 11b and the inner panel 11c are combined, and a sensor storage portion 61c formed integrally with the fitting portion 61b.
[0040]
The fitting portion 61b includes inner lip portions 61d projecting inward, and a U-shaped hollow portion 61e formed in a U-shaped cross section.
The sensor housing portion 61c is a housing in which the pressure detecting sensor 35 is housed in a hollow portion 61f having a circular cross section, and has an outer lip portion 61g which obtains a sealing property by being pressed against the body 18 (see FIG. 6A) on the outer surface. Is provided.
[0041]
In (c), the protruding piece 62 is bonded to the bent portion 61a of the weather strip 61 with an adhesive or the like, and has a shape following the bent portion 61a for bonding to the bent portion 61a. A portion 62a, a substantially triangular base 62b (see FIG. 6 (a)), an outer rib 62c raised from the edge of the base 62b, and an inner rib 62d raised inside the outer rib 62c. Thus, the rigidity of the base 62b and the outer rib 62c is increased by the inner rib 62d. Reference numeral 62e denotes a tip lip formed at the tip of the outer rib 62c, and a sealing property is obtained by pressing against the body 18 (see FIG. 6A).
[0042]
The procedure for assembling the weather strip 61 described above will now be described.
FIGS. 7 (a) and 7 (b) are action diagrams showing an assembling procedure of another embodiment of the weather strip according to the present invention.
3A, the joint 62a of the projecting piece 62 is joined to the bent portion 61a of the weather strip 61 with an adhesive or the like.
[0043]
That is, in (b), on the side surfaces of the fitting portion 61b of the bent portion 61a and the sensor housing portion 61c, the first joining surface 62f of the J-shaped joining portion 62a and the second joining surface of the arc-shaped recess are provided. Adhere 62 g.
[0044]
As described above with reference to FIGS. 2 and 3 (a) to 3 (c), the present invention firstly attaches a weather strip 21 around the tail gate 11 to close a gap with the body 18 side. The corner door seal portion 33 corresponding to the tail gate corner portion 11a of the strip 21 is provided with a projection 41 for transmitting an external force to the pressure detection sensor 37 embedded in the weather strip 21.
[0045]
By providing the projecting portion 41 on the corner door seal portion 33 of the weather strip 21, the gap between the corner of the body 18 and the projecting portion 41 provided on the corner 11a of the tailgate 11 can be almost eliminated. Even when a small foreign matter 58 is sandwiched between the body 18 and the corner portion 11a of the tailgate 11, an external force generated by the foreign matter 58 being sandwiched can be transmitted to the pressure detection sensor 37 via the protrusion 41, and Since the projection 41 does not require the radius of the arc portion of the pressure sensor 37 to be reduced, it is possible to prevent the pressure detection accuracy of the pressure sensor 37 from lowering. It is possible to improve the detection accuracy of foreign matter trapping between the portion 11a.
[0046]
Second, the present invention extrudes the vertical door seal portion 31 and the horizontal door seal portion 32, which are portions other than the square door seal portion 33 of the weather strip 21, and forms the square door seal portion 33 with the vertical door seal portion 31 and the horizontal door seal portion 32. Was separately molded and joined to the vertical door seal portion 31 and the horizontal door seal portion 32, and the pressure detecting sensor 37 was inserted into the square door seal portion 33 from the sensor insertion slit 43 provided in the square door seal portion 33. It is characterized by the following.
[0047]
By forming the square door seal portion 33 of the weather strip 21 separately from the vertical door seal portion 31 and the horizontal door seal portion 32, the pressure detection sensor 33 provided on the square door seal portion 33 is adapted to be suitable for the pressure detection state. This can be selected separately from the pressure detection sensors 35 and 36 disposed on the vertical door seal portion 31 and the horizontal door seal portion 32 of the strip 21, and the pressure detection sensitivity of the square door seal portion 33 of the weather strip 21 can be increased.
[0048]
Third, the present invention is characterized in that, as described with reference to FIGS. 6A to 6C, a die-shaped projecting piece 62 is joined to a bent portion 61 a of an extruded weather strip 61. I do.
[0049]
A bent portion 61a of the weather strip 61 and a portion other than the bent portion 61a are integrally formed, and a pressure detecting sensor 35 disposed at a portion other than the bent portion 61a and the bent portion 61a of the weather strip 61 is provided. By integrating them, an increase in the cost of the weather strip 61 and the pressure detection sensor 35 can be suppressed.
[0050]
【The invention's effect】
The present invention has the following effects by the above configuration.
In the pressure-sensitive sensor structure for a door according to the first aspect, a seal member that closes a gap between the door and the body is attached to the periphery of the door, and a pressure sensor embedded in the seal member at a corner corresponding to the door corner of the seal member. Since the sensor is provided with a pressing member that transmits external force, the gap between the corner of the body and the pressing member can be almost eliminated, and even if a small foreign object is sandwiched between the body and the corner of the door, the foreign object can be removed. The external force generated by the pinching of the pressure sensor can be transmitted to the pressure detecting sensor via the pressing member, and the radius of the arc portion of the pressure detecting sensor does not have to be reduced by the pressing member. A decrease in pressure detection accuracy can be prevented, and the detection accuracy of foreign matter trapped between the body and the corner of the door can be increased.
[0051]
The pressure-sensitive sensor structure for a door according to claim 2, wherein a portion other than the corner portion of the seal member is extruded and molded, and the corner portion is formed separately from the portion other than the corner portion, and a mold is formed. After joining, the pressure detection sensor was inserted into the inside from the slit provided at the corner, so the corner of the seal member was separated from the other parts, so that the pressure detection sensor provided at the corner was It can be selected separately from a pressure detection sensor arranged at a portion other than the corner of the seal member as appropriate according to the detection state, and the pressure detection sensitivity at the corner of the seal member can be increased.
[0052]
In the pressure-sensitive sensor structure for a door according to the third aspect, since the pressing member molded by the die is joined to the corner portion of the sealing member extruded, the corner portion of the sealing member and portions other than the corner portion are integrally formed. In addition, by integrating the pressure detecting sensors disposed at the corners and the portions other than the corners of the sealing member, it is possible to suppress an increase in cost of the sealing member and the pressure detecting sensor.
[Brief description of the drawings]
FIG. 1 is a rear side view of a vehicle employing a door pressure-sensitive sensor structure according to the present invention; FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1; FIG. FIG. 4 is an operation view showing the procedure of assembling the weather strip according to the present invention. FIG. 5 is an operation view showing the operation of the weather strip. FIG. 6 is another embodiment of the door pressure-sensitive sensor structure according to the present invention. FIG. 7 is an operation view showing an assembly procedure of another embodiment of the weather strip according to the present invention. FIG. 8 is a side view showing a conventional door pressure-sensitive sensor structure. Sectional view showing the structure of a conventional pressure-sensitive sensor for a door.
11: door (tail gate), 11a: corner of tail gate, 18: body, 21, 61: seal member (weather strip), 31, 32: portion other than corner of seal member (vertical door seal, horizontal Door seal part), 33 ... Square part of seal member (Square door seal part), 35, 36, 37 ... Sensor for pressure detection, 41,62 ... Pressing member (projection part, projecting piece), 43 ... Slit (sensor insertion slit) .

Claims (3)

A seal member that closes a gap with the body side is attached around the door, and a pressing member that transmits an external force to a pressure detection sensor embedded in the seal member is provided at a corner corresponding to the corner of the door of the seal member. Features a pressure sensor structure for doors. The parts other than the corners of the seal member are extruded, and the corners are molded separately from the parts other than the corners and are molded and joined to the parts other than the corners, and from the slits provided in the corners. The pressure-sensitive sensor structure for a door according to claim 1, wherein the pressure detecting sensor portion is inserted inside a corner portion. 2. The pressure-sensitive sensor structure for a door according to claim 1, wherein the pressing member formed by molding is joined to a corner portion of the extruded sealing member.

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