JP2014054959A - Pneumatic sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic sensor which may be securely joined to a wheel.SOLUTION: A pneumatic sensor 1 is used for measuring an air pressure of a tire attached to a wheel. The pneumatic sensor includes a body part 10 and multiple protruding parts 20. The body part detects the air pressure. The multiple protruding parts respectively protrude from the body part. The pneumatic sensor is joined to the wheel by a joining member 30 filling spaces between the multiple protruding parts.

Description

  The present invention relates to an air pressure sensor.

  2. Description of the Related Art In recent years, in order to drive an automobile more safely, there is an air pressure sensor that constantly monitors the air pressure of a tire and notifies the driver of the automobile when the air pressure drops. Some of such air pressure sensors are integrally attached to an air injection valve that is inserted into a wheel and fixed. However, in the air injection valve to which the air pressure sensor is attached, air in the tire may leak from a seal portion that is inserted into the wheel and fixed by centrifugal force acting on the air pressure sensor.

  Thus, a configuration of an air pressure sensor that detachably attaches to a part of a rim of a wheel via a sensor holder and measures an internal pressure of a tire attached to the wheel is disclosed (for example, see Patent Document 1).

JP 2003-200723 A

  However, the air pressure sensor disclosed in Patent Document 1 is not necessarily firmly bonded to the wheel. Therefore, when a wheel equipped with tires is rotated at a high speed in order to increase the speed of the vehicle, an excessive centrifugal force is applied to the air pressure sensor, and the air pressure sensor may be peeled off from the wheel.

  Even if the air pressure sensor is reduced in weight in order to reduce the centrifugal force applied to the air pressure sensor, the air pressure sensor often has a simple configuration with a weight of several tens of grams, and further weight reduction is difficult. is there.

  Even if the air pressure sensor is made large along the wheel and the surface area where the air pressure sensor and the wheel are joined increases to make it difficult for the air pressure sensor to peel off from the wheel, the air pressure sensor increases in weight. Power also increases.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an air pressure sensor that can be firmly bonded to a wheel.

  The air pressure sensor according to the present invention that achieves the above object measures the air pressure of a tire mounted on a wheel. The air pressure sensor has a main body and a plurality of protrusions. The main body detects air pressure. Each of the plurality of protrusions protrudes from the main body. Here, the air pressure sensor is joined to the wheel by a joining member filled between the plurality of protrusions.

  According to the pneumatic sensor configured as described above, by having the plurality of protrusions, the bonding area between the plurality of protrusions protruding from the main body and the bonding member bonded to the wheel increases. Therefore, the air pressure sensor can be firmly bonded to the wheel, and the air pressure sensor can be prevented from peeling off from the wheel.

It is a perspective view which shows the state which has arrange | positioned the pneumatic sensor which concerns on 1st Embodiment in the motor vehicle. It is a perspective view which shows the state which joined the air pressure sensor which concerns on 1st Embodiment to the outer peripheral surface of the wheel. It is a perspective view which shows the air pressure sensor which concerns on 1st Embodiment. It is a perspective view which shows the state which filled the joining member between the protrusion parts of the pneumatic sensor which concerns on 1st Embodiment. It is sectional drawing which shows the state which joined the air pressure sensor with which the joining member which concerns on 1st Embodiment was filled to the outer peripheral surface of the wheel. It is sectional drawing which shows the state which joins the pneumatic sensor with which the joining member which concerns on 2nd Embodiment was filled to a wheel. It is a perspective view which shows the air pressure sensor which concerns on 3rd Embodiment. It is sectional drawing which shows the state which joined the pneumatic sensor with which the joining member which concerns on 3rd Embodiment was filled to the outer peripheral surface of the wheel. It is sectional drawing which shows the state which joined the pneumatic sensor filled with the joining member which concerns on 4th Embodiment to the outer peripheral surface of the wheel larger than the curvature radius of the outer peripheral surface of the wheel shown in FIG. It is sectional drawing which shows the state which joined the pneumatic sensor filled with the joining member which concerns on 4th Embodiment to the outer peripheral surface of the wheel smaller than the curvature radius of the outer peripheral surface of the wheel shown in FIG. It is a perspective view which shows the state which filled the joining member between the protrusion parts of the pneumatic sensor which concerns on 5th Embodiment. It is a top view which shows the air pressure sensor which concerns on 5th Embodiment from the joining direction with a wheel. It is a top view which shows the air pressure sensor which concerns on 5th Embodiment from the joining direction with a wheel. It is a perspective view which shows the air pressure sensor of the state which filled the joining member between protrusion parts which concern on 6th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The size and ratio of each member in the drawings are exaggerated for convenience of explanation and may be different from the actual size and ratio.

(First embodiment)
The configuration of the air pressure sensor 1 according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a state in which the air pressure sensor 1 is disposed in the automobile 100. FIG. 2 is a perspective view showing a state in which the air pressure sensor 1 is joined to the outer peripheral surface 200 a of the wheel 200. FIG. 3 is a perspective view showing the air pressure sensor 1. FIG. 4 is a perspective view illustrating a state in which the bonding member 30 is filled between the protrusions 20 of the air pressure sensor 1. FIG. 5 is a cross-sectional view showing a state in which the air pressure sensor 1 filled with the joining member 30 in the direction along the line AA shown in FIG. 4 is joined to the outer peripheral surface 200a of the wheel 200 shown in FIG.

  First, an outline of the air pressure sensor 1 will be described with reference to FIGS. 1 and 2.

  The air pressure sensor 1 is bonded to, for example, a wheel 200 of the automobile 100 and measures the air pressure of a tire 300 attached to the wheel 200. One air pressure sensor 1 is joined to each of the outer peripheral surfaces 200a of the four wheels 200 relating to the left and right front wheels and the rear wheels provided in the automobile 100. The reception indicator 400 disposed in front of the driver's seat of the automobile 100 receives information on the air pressure of the tire 300 measured by each air pressure sensor 1 via the radio wave R. When there is an abnormality in the air pressure of the tire 300, the reception indicator 400 notifies the driver of the abnormality by blinking a light source (not shown) or sounding a buzzer (not shown).

  Next, details of the air pressure sensor 1 will be described with reference to FIGS.

  As shown in FIG. 3, the air pressure sensor 1 has a main body 10 and a plurality of protrusions 20. Here, as shown in FIGS. 4 and 5, the air pressure sensor 1 is joined to the wheel 200 by the joining member 30 filled between the plurality of protrusions 20.

  Note that the air pressure sensor 1 does not include a roughened portion to be joined to the outer peripheral surface 200 a of the wheel 200. That is, the air pressure sensor 1 does not include a conventional air pressure sensor in which a portion to be joined to the outer peripheral surface of the wheel is mat processed to form a plurality of fine uneven portions and protrusions.

  The main body 10 detects air pressure. Specifically, the main body 10 is configured by molding the outer periphery of the sensor 11 with, for example, a nylon resin. As shown in FIG. 3, the surface on which the protruding portion 20 of the main body portion 10 protrudes is formed with, for example, three surfaces along the outer peripheral surface 200 a of the wheel 200. The surface from which the protrusion part 20 of the main-body part 10 protrudes is not limited to 3 surfaces, For example, you may form in a multi-surface other than a plane and 2 surfaces, a curved surface, etc.

  The sensor 11 embedded in the main body 10 includes, for example, an element that detects air pressure, a transmitter that transmits the air pressure detected by the element to the reception display 400 at regular intervals, and a power source that supplies driving power to the element and the like. Is provided. For example, an element is used in which a resistance is bonded to a base material that is distorted in accordance with air pressure, and the resistance value of the distorted resistance changes as the base material is distorted. The element detects a change in air pressure as a change in electrical resistance value. The sensor 11 is not limited to the above-described configuration, and any sensor that can measure the air pressure in the tire 300 attached to the wheel 200 may be used. Moreover, the main-body part 10 is not limited to the structure which molds the outer periphery of the sensor 11 with resin, For example, you may comprise the some protrusion part 20 in the sensor 11 directly joined.

  Each of the plurality of projecting portions 20 projects from one surface of the main body portion 10. Specifically, the plurality of protruding portions 20 shown in FIG. 3 are provided so as to protrude in an arc shape from one surface of the main body portion 10 along the outer peripheral surface 200a of the wheel 200 shown in FIG. The plurality of protrusions 20 are arranged in a matrix on the main body 10. The plurality of protrusions 20 are formed integrally with the main body 10, for example. The protrusion 20 has, for example, a diameter and a protruding dimension of 0. It can be several mm to several mm.

  The shape of the protrusion 20 is not limited to a cylindrical shape, and may be, for example, a polygonal column shape. The protrusions 20 are not limited to a configuration in which the protrusions 20 are arranged in a matrix with respect to the main body 10, and may be randomly arranged with respect to the main body 10. The plurality of protrusions 20 are not limited to a structure that is integrally molded with the main body 10, and the protrusions 20 are separately molded with, for example, a nylon resin and then molded with a nylon resin. The main body 10 may be bonded and fixed in a matrix. If the material of the protrusion part 20 and the main-body part 10 is the same, compared with the case where the member which consists of a different material is adhere | attached and fixed, it can adhere | attach and fix firmly.

  The joining member 30 joins the air pressure sensor 1 and the wheel 200. For the bonding member 30, for example, an adhesive or an adhesive containing an epoxy resin is used. The adhesive is joined to the outer peripheral surface 200a of the wheel 200 as shown in FIG. 5 in a state where the adhesive is uniformly filled between the plurality of protrusions 20 of the air pressure sensor 1 as shown in FIG. On the other hand, the adhesive may be filled between the plurality of protrusions 20 by applying the adhesive to the outer peripheral surface 200a of the wheel 200 with a sufficient thickness and then pressing the plurality of protrusions 20 of the air pressure sensor 1. Good. As the wheel 200 to which the adhesive is bonded, for example, a steel electrodeposited coating is used. By comprising in this way, since the joining area of the joining member 30 and the some protrusion part 20 increases, compared with the case where it does not have the some protrusion part 20, the air pressure sensor 1 is set with respect to the wheel 200. And can be firmly joined.

  The pneumatic sensor 1 according to the first embodiment described above has the following operational effects.

  The air pressure sensor 1 measures the air pressure of the tire 300 attached to the wheel 200. The air pressure sensor 1 has a main body 10 and a plurality of protrusions 20. The main body 10 detects air pressure. The plurality of projecting portions 20 project from the main body portion 10. Here, the air pressure sensor 1 is joined to the wheel 200 by the joining member 30 filled between the plurality of protrusions 20.

  If comprised in this way, the pneumatic sensor 1 has the some protrusion part 20, and the joining area of the some protrusion part 20 which protruded from the main-body part 10 and the joining member 30 joined to the wheel 200 increases. . Therefore, the air pressure sensor 1 can be firmly bonded to the wheel 200 as compared with the case where the plurality of protrusions 20 are not provided, and the air pressure sensor 1 can be prevented from peeling from the wheel 200. .

  Here, the air pressure sensor 1 is configured to be directly joined to the wheel 200 without using an air valve. Therefore, there is no possibility that air filled between the tire 300 and the wheel 200 leaks without leaking from the seal portion of the air valve inserted and fixed to the wheel 200.

  Further, the air pressure sensor 1 is joined to the wheel 200 if the surface of the main body 10 from which the protrusion 20 is protruded has a shape along the outer peripheral surface 200a of the wheel 200 and the length of each protrusion 20 is the same. The layer thickness of the joining member 30 to be made can be made constant. Therefore, the air pressure sensor 1 can be evenly joined to the wheel 200 via the joining member 30 having a constant layer thickness.

(Second Embodiment)
The configuration of the air pressure sensor 2 according to the second embodiment will be described with reference to FIG.

  The air pressure sensor 2 uses a joining member 40 including an adhesive having elasticity. In the second embodiment, the same reference numerals are used for components having the same configuration as in the first embodiment, and the above description is omitted.

  6 is a cross-sectional view showing a state in which the pneumatic sensor 2 filled with the joining member 40 is joined to the wheel 200. FIG. FIG. 6A shows a state before the pneumatic sensor 2 filled with the joining member 40 between the protrusions 20 is joined to the wheel 200. FIG. 6B shows a state in which the tip of the joining member 40 is in contact with the wheel 200. FIG. 6C shows a state after the joining member 40 is joined to the wheel 200 in a state where the tip of the joining member 40 is in close contact with the wheel 200.

  As shown in FIG. 6A, the air pressure sensor 2 is provided with a plurality of protrusions 20 in a circular arc shape at regular intervals so as to follow the outer peripheral surface 200 a of the wheel 200. Here, the joining member 40 including the adhesive having elasticity is filled between the protrusions 20, and the joining member 40 is joined to the outer peripheral surface 200 a of the wheel 200. The joining member 40 has elasticity by containing, for example, a high-viscosity epoxy adhesive. First, as shown in FIG. 6A, the joining member 40 is filled so as to rise slightly from between the protrusions 20, for example. Next, as shown in FIG. 6B, the air pressure sensor 2 is brought close to the wheel 200, and the tip of the joining member 40 is brought into contact with the outer peripheral surface 200 a of the wheel 200. Further, as shown in FIG. 6C, when the air pressure sensor 2 is biased against the wheel 200, the elastic joining member 40 fills the gap between the protruding portion 20 and the outer peripheral surface 200 a of the wheel 200. Join. Therefore, the air pressure sensor 2 is in close contact with and joined to the outer circumferential surface 200a in a state where the joining member 40 follows the shape of the outer circumferential surface 200a of the wheel 200.

  According to the pneumatic sensor 2 according to the second embodiment described above, in addition to the operational effects of the pneumatic sensor 1 according to the first embodiment described above, the following operational effects are further exhibited.

  In the air pressure sensor 2, the joining member 40 includes an adhesive having elasticity and is provided between the protrusions 20.

  If comprised in this way, even if the surface shape of the outer peripheral surface 200a differs by making the joining member 40 follow the shape of the outer peripheral surface 200a of the wheel 200, the adhesiveness of the air pressure sensor 2 with respect to the outer peripheral surface 200a is improved. Can be kept constant.

  Further, the air pressure sensor 2 may include an adhesive for the joining member 40 that includes an epoxy resin, a silicon resin, or an acrylic resin.

  If comprised in this way, since the adhesive agent which consists of said resin has sufficient elasticity, it can fully contact | adhere the air pressure sensor 2 with respect to the wheel 200. FIG.

(Third embodiment)
A configuration of the air pressure sensor 3 according to the third embodiment will be described with reference to FIGS. 7 and 8.

  The pneumatic sensor 3 has a configuration in which the distal end portion 50b extending from the proximal end portion 50a is larger in cross-sectional area of the protruding portion 50 than the proximal end portion 50a joined to the main body portion 10 as described in the first embodiment. Different from the air pressure sensor 1 according to the embodiment. In the third embodiment, the same reference numerals are used for components having the same configuration as in the first embodiment, and the above description is omitted.

  FIG. 7 is a perspective view showing the air pressure sensor 3. FIG. 8 is a cross-sectional view showing a state in which the air pressure sensor 3 filled with the joining member 30 is joined to the outer peripheral surface 200a of the wheel 200 shown in FIG.

  As shown in FIGS. 7 and 8, the air pressure sensor 3 is provided with a plurality of protrusions 50 in a circular arc shape at regular intervals along the outer peripheral surface 200 a of the wheel 200. Here, the protrusion 50 has a larger cross-sectional area at the distal end 50b extending from the proximal end 50a than the proximal end 50a joined to the main body 10. That is, the protrusion 50 is formed in a truncated cone so that the diameter increases toward the distal end 50b extending from the base end 50a of the main body 10. The air pressure sensor 3 is joined to the outer peripheral surface 200 a of the wheel 200 as shown in FIG. 8 in a state in which the joining member 30 is filled between the protrusions 50. Therefore, the air pressure sensor 3 can hook the distal end portion 50b of the protruding portion 50 on the joint portion with the joint member 30 by the anchor effect. The shape of the protrusion 50 is not limited to the truncated cone shape, and may be a truncated pyramid shape, for example. The anchor effect may be increased by providing a plurality of grooves on the outer peripheral surface of the protruding portion 50 in the protruding direction.

  According to the pneumatic sensor 3 according to the third embodiment described above, in addition to the operational effects of the pneumatic sensors 1 and 2 according to the first and second embodiments described above, the following operational effects are further exhibited.

  In the air pressure sensor 3, the cross-sectional area of the protrusion 50 is larger at the distal end 50 b extending from the proximal end 50 a than at the proximal end 50 a joined to the main body 10.

  If comprised in this way, even if centrifugal force etc. act in the direction away from the joining member 30 with respect to the protrusion part 50, the protrusion part 50 will be hooked on the joining member 30 by an anchor effect, and the protrusion part 50 will be connected to the joining member 30. It can be made difficult to come out of. Therefore, the bonding strength between the air pressure sensor 3 and the wheel 200 can be improved.

(Fourth embodiment)
A configuration of the air pressure sensor 4 according to the fourth embodiment will be described with reference to FIGS. 9 and 10.

  The pneumatic sensor 4 is different from the pneumatic sensor 1 according to the first embodiment described above in that the protrusion 60 having elasticity is used. In the fourth embodiment, components having the same configuration as in the first embodiment are denoted by the same reference numerals, and the above description is omitted.

  FIG. 9 is a cross-sectional view showing a state where the air pressure sensor 4 filled with the joining member 30 is joined to the outer peripheral surface 500a of the wheel 500 larger than the radius of curvature of the outer peripheral surface 200a of the wheel 200 shown in FIG. FIG. 10 is a cross-sectional view showing a state where the air pressure sensor 4 filled with the joining member 30 is joined to the outer peripheral surface 600a of the wheel 600 smaller than the curvature radius of the outer peripheral surface 200a of the wheel 200 shown in FIG.

  The air pressure sensor 4 is provided with a plurality of protrusions 60 in a circular arc shape at regular intervals. Here, the protrusion part 60 is formed from the epoxy-type resin which has elasticity, for example. That is, the protrusion 60 bends or expands and contracts when pressure is applied. As shown in FIG. 9, the air pressure sensor 4 is joined to the outer peripheral surface 500 a of the wheel 500 in a state in which the joining member 30 is filled between the protrusions 60. As shown in FIG. 9, the plurality of protrusions 60 of the air pressure sensor 4 are partially bent when attempting to join the outer peripheral surface 500 a of the wheel 500 that is larger than the radius of curvature of the outer peripheral surface 200 a of the wheel 200. Specifically, the plurality of protrusions 60 of the air pressure sensor 4 are closely adhered along the outer peripheral surface 500a of the wheel 500 so as to bend gradually and greatly from the center toward both ends as shown in FIG.

  Further, the air pressure sensor 4 may be joined by being biased to the outer peripheral surface 600a of the wheel 600 smaller than the radius of curvature of the outer peripheral surface 200a of the wheel 200 in a state in which the joining member 30 is filled between the protrusions 60. it can. In this case, the plurality of protrusions 60 of the air pressure sensor 4 are closely adhered along the outer peripheral surface 600a of the wheel 600 so as to bend gradually and greatly from the both ends shown in FIG.

Therefore, even when the curvature radius of the outer peripheral surface 200a of the wheel 200 is different, the protrusion 60 of the air pressure sensor 4 follows the shape of the outer peripheral surface 500a of the wheel 500 or the outer peripheral surface 600a of the wheel 600. The adhesion surface area with the outer peripheral surface can be kept constant.

  According to the pneumatic sensor 4 according to the fourth embodiment described above, in addition to the operational effects of the pneumatic sensors 1 to 3 according to the first to third embodiments described above, the following operational effects are further exhibited.

  As for the air pressure sensor 4, the protrusion part 60 has elasticity.

  If comprised in this way, even if the curvature radius of the outer peripheral surface of a wheel differs, the protrusion part 60 of the air pressure sensor 4 follows the shape of the outer peripheral surface of each wheel. For this reason, the front-end | tip of the protrusion part 60 of the air pressure sensor 4 and the outer peripheral surface of a wheel can be stuck.

  Furthermore, if comprised in this way, it is not necessary to make the front-end | tip of the protrusion part 60 of the pneumatic sensor 4 into a complicated shape according to the wheel which consists of a complicated shape in which an outer peripheral surface has an unevenness | corrugation, an inclined surface, etc.

  Further, with this configuration, it is not necessary to prepare a plurality of types of air pressure sensors for each type of wheels with different curvatures on the outer peripheral surface, and only one type of air pressure sensor 4 is required. Can respond.

(Fifth embodiment)
The configuration of the air pressure sensor 5 according to the fifth embodiment will be described with reference to FIGS.

  In the air pressure sensor 5, for example, the front part 10 a or the rear part 10 c of the main body part 10 along the rotation direction of the wheel 200 is adjacent to the central part 10 b of the main body part 10 along the rotation direction of the wheel 200. The interval between the parts is narrowed. Such a configuration is different from the pneumatic sensor 1 according to the first embodiment described above. In the fifth embodiment, the same reference numerals are used for components having the same configuration as in the first embodiment, and the above description is omitted.

  First, the air pressure sensor 5 will be described with reference to FIGS. 11 and 12.

  FIG. 11 is a perspective view showing a state in which the bonding member 30 is filled between the protruding portions of the air pressure sensor 5. FIG. 12 is a plan view showing the air pressure sensor 5 from the direction of joining with the wheel 200.

  As shown in FIGS. 11 and 12, the air pressure sensor 5 is provided with a plurality of protrusions 70 in an arc shape at regular intervals along the outer peripheral surface 200 a of the wheel 200. Here, the air pressure sensor 5 includes a plurality of protrusions 70 provided on the front part 10a of the main body part 10 and a plurality of protrusions 70 provided on the center part 10b of the main body part 10 along the rotation direction of the wheel 200. The interval between the plurality of protrusions 70 provided in the rear portion 10c is narrowed. In other words, in the air pressure sensor 5, the protrusions are more densely arranged in the front part 10 a and the rear part 10 c of the main body part 10 than in the central part 10 b of the main body part 10. Therefore, in the air pressure sensor 5, the front portion 10 a and the rear portion 10 c of the main body portion 10 have a larger bonding area between the protruding portion and the bonding member 30 than the central portion 10 b of the main body portion 10. It can be firmly joined.

  According to the pneumatic sensor 5 according to the fifth embodiment shown in FIG. 12, in addition to the operational effects of the pneumatic sensors 1 to 4 according to the first to fourth embodiments described above, the following operational effects are further exhibited.

  In the air pressure sensor 5, the interval between adjacent protrusions is larger than the protrusions 70 arranged in the central part 10 b of the main body part 10 along the rotation direction of the wheel 200, and the main body part 10 along the rotation direction of the wheel 200. The protrusion 70 disposed on the front portion 10a or the protrusion 70 disposed on the rear portion 10c is narrower.

  If comprised in this way, as for the air pressure sensor 5, the joining area of the protrusion part 70 and the joining member 30 is large in the front part 10a of the main-body part 10 rather than the center part 10b of the main-body part 10, and it is in the wheel 200. It can be firmly joined. Therefore, even when the automobile 100 equipped with the wheel 200 suddenly decelerates while traveling and the stress due to deceleration concentrates on the front part of the air pressure sensor 5 due to the inertial force P1 acting in the direction shown in FIG. The sensor 5 can be prevented from peeling from the wheel 200.

  Also, with this configuration, the air pressure sensor 5 has a larger joining area between the protruding portion 70 and the joining member 30 in the rear portion 10c of the main body portion 10 than in the central portion 10b of the main body portion 10. It is firmly joined to. Therefore, even when the automobile 100 equipped with the wheel 200 suddenly accelerates from a stopped state and the stress due to the acceleration is concentrated on the rear part of the air pressure sensor 5 due to the inertial force P2 acting in the direction shown in FIG. The sensor 5 can be prevented from peeling from the wheel 200.

  Further, the air pressure sensor 5 will be described with reference to FIG.

  FIG. 13 is a plan view showing the air pressure sensor 5 from the direction of joining with the wheel 200, as in FIG.

  As shown in FIG. 13, the air pressure sensor 5 extends along the direction intersecting the rotation direction of the wheel 200 rather than the interval between the plurality of protrusions 70 provided in the central portion 10 d of the main body 10 along the rotation direction of the wheel 200. The interval between the plurality of protrusions 70 provided at one end 10e of the main body 10 and the interval between the plurality of protrusions 70 provided at the other end 10f facing the one end 10e are narrowed. That is, in the air pressure sensor 5, the projecting portions are arranged more densely at the one end portion 10 e and the other end portion 10 f of the main body portion 10 than at the central portion 10 d of the main body portion 10. Therefore, in the air pressure sensor 5, the one end portion 10 e and the other end portion 10 f of the main body portion 10 have a larger bonding area between the protruding portion and the bonding member 30 than the central portion 10 d of the main body portion 10. On the other hand, it can be firmly joined.

  The pneumatic sensor 5 according to the fifth embodiment shown in FIG. 13 has the following operational effects.

  In the air pressure sensor 5, the interval between adjacent protrusions is along the direction intersecting the rotation direction of the wheel 200 rather than the protrusion 70 disposed at the central portion 10 d of the main body 10 along the rotation direction of the wheel 200. The protrusion 70 disposed at the one end 10e of the main body 10 or the protrusion 70 disposed at the other end 10f facing the one end 10e is narrower.

  If comprised in this way, as for the pneumatic sensor 5, the joining area of the protrusion part and the joining member 30 is larger in the one end part 10e or the other end part 10f of the main body part 10 than in the central part 10d of the main body part 10. , Can be joined more firmly. Therefore, when the automobile 100 equipped with the wheel 200 is cornered at high speed during traveling, the centrifugal force P3 or P4 acting in the direction shown in FIG. 13 causes the one end 10e or the other end 10f of the air pressure sensor 5 to move in the direction. Even when a large centrifugal force is applied, the air pressure sensor 5 does not peel from the wheel 200.

(Sixth embodiment)
The configuration of the air pressure sensor 6 according to the sixth embodiment will be described with reference to FIG.

  The air pressure sensor 6 has a configuration in which a first main body 80a provided with a sensor 11 for detecting air pressure and a second main body 80b stacked on the first main body 80a and provided with a protrusion 20 are provided separately. It is different from the pneumatic sensor 1 according to the first embodiment described above. In the sixth embodiment, the same reference numerals are used for components having the same configuration as in the first embodiment, and the above description is omitted.

  14 is a perspective view showing the air pressure sensor 6 in a state in which the joining member 30 is filled between the protrusions 20. FIG. 14A shows a state in which the first main body portion 80a provided with the sensor 11 for detecting air pressure and the second main body portion 80b provided with the protruding portion 20 are separated. FIG. 14B shows the first main body 80a and the second main body 80b joined together.

  As shown in FIG. 14, the air pressure sensor 6 includes a main body 80 composed of a first main body 80 a provided with a sensor 11 for detecting air pressure, and a second main body 80 b provided with a protrusion 20. . That is, the main body 80 corresponds to a configuration in which the integrally molded main body 10 is divided into two and molded. The first main body 80a and the second main body 80b are molded from the same material, for example. The air pressure sensor 6 uses only the second main body portion 80b corresponding to the bracket while sharing the first main body portion 80a provided with the sensor 11 for detecting air pressure for a plurality of types of wheels having different outer peripheral surface shapes. It can be set as the structure corresponding to a wheel.

  According to the pneumatic sensor 6 according to the sixth embodiment described above, in addition to the operational effects of the pneumatic sensors 1 to 5 according to the first to fifth embodiments described above, the following operational effects are further exhibited.

  The air pressure sensor 6 includes a main body 80 including a first main body 80a provided with a sensor 11 for detecting air pressure, and a second main body 80b stacked on the first main body 80a and provided with a protrusion 20. It is out.

  If comprised in this way, only the 2nd main body part 80b equivalent to a bracket is shared, sharing the 1st main body part 80a which provided the sensor 11 which detects an air pressure with respect to several types of wheels from which the shape of an outer peripheral surface differs. What corresponds to each wheel may be used.

  If the 1st main-body part 80a and the 2nd main-body part 80b are shape | molded with the same material, the 1st main-body part 80a and the 2nd main-body part 80b can be firmly joined by using an adhesive agent.

  Furthermore, if comprised in this way, the 2nd main-body part 80b can be attached to the several location from which the shape of the part to join in the same wheel 200 differs by selecting the 2nd main-body part 80b arbitrarily. .

  In addition, the present invention can be variously modified based on the configurations described in the claims, and these are also within the scope of the present invention.

  The air pressure sensor is not limited to a configuration that is attached to a wheel of a so-called private vehicle, and may be used by being attached to a wheel of a truck, a bus, a motorcycle, or the like.

1, 2, 3, 4, 5, 6 Air pressure sensor,
10,80 body part,
10a front,
10b, 10d center part,
10c rear,
10e one end,
10f other end,
80a first body part,
80b second body part,
11 sensors,
20, 50, 60, 70 protrusion,
50a proximal end,
50b tip,
30, 40 joining members,
100 cars,
200, 500, 600 wheels,
200a, 500a, 600a outer peripheral surface,
300 tires,
400 Receive indicator.

Claims (8)

An air pressure sensor that measures the air pressure of a tire mounted on a wheel,
A main body for detecting air pressure;
A plurality of protrusions protruding from the main body,
An air pressure sensor joined to the wheel by a joining member filled between the plurality of protrusions.   The pneumatic sensor according to claim 1, wherein the joining member includes an adhesive having elasticity and is provided by being filled between the protrusions.   The air pressure sensor according to claim 2, wherein the adhesive includes an epoxy resin, a silicon resin, or an acrylic resin.   The pneumatic sensor according to any one of claims 1 to 3, wherein a cross-sectional area of the protruding portion is larger at a distal end portion extending from the proximal end portion than at a proximal end portion joined to the main body portion.   The air pressure sensor according to claim 1, wherein the protrusion has elasticity.   The spacing between the adjacent protrusions is arranged at the front part of the main body part along the rotation direction of the wheel rather than the protrusion part arranged at the center part of the main body part along the rotation direction of the wheel. The air pressure sensor according to any one of claims 1 to 5, wherein the protruding portion or the protruding portion disposed at the rear portion is narrower.   The interval between the adjacent projecting portions is one end of the main body portion along the direction intersecting the rotational direction of the wheel, rather than the projecting portion disposed at the central portion of the main body portion along the rotational direction of the wheel. The air pressure sensor according to any one of claims 1 to 6, wherein a protrusion disposed at a portion or a protrusion disposed at the other end facing the one end is narrower.   The said main-body part contains the 1st main-body part provided with the sensor which detects an air pressure, and the 2nd main-body part which laminated | stacked on the said 1st main-body part and arrange | positioned the said protrusion part, The any one of Claims 1-7 The air pressure sensor according to item 1.