JP6019049B2 - Tire valve unit - Google Patents

Description

  The present invention relates to a tire valve unit formed by integrating a tire valve and a sensor unit.

  2. Description of the Related Art Conventionally, a tire condition monitoring device that monitors the condition of a tire such as the air pressure of a vehicle tire is known. In the tire valve unit used in the tire condition monitoring device, a tire valve and a sensor unit are integrated (for example, see Patent Document 1).

  As shown in FIG. 14, in Patent Document 1, in the tire valve 101, the outer peripheral surface on one end side in the axial direction of the valve stem 102 is covered with an elastic body 103. The other axial end of the valve stem 102 protrudes from the elastic body 103. The other end of the valve stem 102 passes through the rim 105 of the wheel 104 and is inserted into the housing 107 of the sensor unit (LDKV) 106. In the valve stem 102, a portion of the sensor unit 106 protruding from the housing 107 is provided with a groove 108, and the tire valve 101 and the sensor unit 106 are integrated by attaching an E-ring 109 to the groove 108. ing. The movement of the valve stem 102 in the tire valve 101 toward one end in the axial direction is restricted by the contact between the E-ring 109 and the housing 107, and the movement of the tire valve 101 toward the other end in the axial direction of the valve stem 102 is elastic. The body 103 and the rim 105 are regulated by contacting each other.

German Patent Application Publication No. 19613936

  By the way, when the tire valve 101 tries to move toward the other axial end of the valve stem 102, the elastic body 103 may be elastically deformed by contact with the rim 105, and the tire valve 101 may move. . Moreover, when the elastic body 103 is not provided, the movement of the tire valve 101 cannot be regulated.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a tire valve unit capable of regulating the movement of the valve stem in the tire valve in both directions along the axial direction. There is to do.

  A tire valve unit that solves the above problems includes a valve stem, a tire valve that is mounted on a rim of a vehicle wheel, and a tire valve that is disposed in a tire mounted on the vehicle wheel. A sensor valve unit that includes a housing that houses the sensor, and the housing includes a pair of wall portions that protrude from the outer surface at a distance from each other. And the valve stem is inserted into an insertion hole of each of the wall portions, and the valve stem has a groove portion or a through hole on an outer peripheral surface located between the pair of wall portions, and the pair of walls And a stopper inserted between the groove and the through hole, and the stopper is attached to the housing. And summarized in that and a has been mounting portion.

  According to this, the stopper is attached to the housing by the attachment portion, so that the stopper is prevented from coming out between the pair of wall portions, and the stopper is provided between the wall portions in the axial direction of the valve stem. Movement along the direction is restricted. And, since the fitting part of the stopper whose movement is restricted is fitted into the groove part or the through hole of the valve stem, the tire valve can move in any direction along the axial direction of the valve stem. Movement is restricted.

In the tire valve unit, it is preferable that the housing has a first locking portion, and the attachment portion has a second locking portion that locks with the first locking portion.
According to this, since the stopper can be attached to the housing by the first locking portion and the second locking portion being locked, the stopper can be easily attached.

  In the tire valve unit, a contact wall extending in a direction along the axial direction of the valve stem is provided on an outer surface of the housing, and the stopper extends in a direction along the axial direction of the valve stem in the contact wall. It is preferable to have a contact portion that contacts the end surface.

  According to this, when the tire valve tries to move in the direction along the axial direction of the bus bus stem, the contact portion of the stopper contacts the end surface of the contact wall in the direction along the axial direction of the valve stem. For this reason, since the stopper contacts not only the wall portion but also the contact wall, the tire valve is further restricted from moving in the direction along the axial direction of the valve stem.

In the tire valve unit, the insertion hole is preferably circular.
According to this, it is easy to insert the valve stem into the insertion hole.

  ADVANTAGE OF THE INVENTION According to this invention, the movement to the both directions along the axial direction of the valve stem in a tire valve can be controlled.

The perspective view which shows the mounting state to the rim | rim of the tire valve unit of 1st Embodiment. The perspective view which shows the tire valve unit of 1st Embodiment. The disassembled perspective view which shows the tire valve unit of 1st Embodiment. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 2 showing the tire valve unit of the first embodiment. The partially broken sectional view which shows the tire valve unit of 1st Embodiment. The disassembled perspective view which shows schematically the tire valve unit of 2nd Embodiment. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 6 showing the tire valve unit of the second embodiment. (A) And (b) is a perspective view which shows the stopper of 2nd Embodiment. FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. 6 showing the tire valve unit of the second embodiment. The perspective view which shows the tire valve unit of 2nd Embodiment. (A)-(d) is sectional drawing which shows the modification of a tire valve unit. (A) And (b) is sectional drawing which shows the modification of a tire valve unit. Sectional drawing which shows the modification of a tire valve unit. The figure for demonstrating a prior art.

(First embodiment)
Hereinafter, a first embodiment in which the tire valve unit is embodied will be described.
As shown in FIG. 1, the tire valve unit 10 includes a tire valve 20 that is mounted on the rim 11 of the vehicle wheel H, and a tire 12 that is integrated with the tire valve 20 and that is mounted on the vehicle wheel H. It is comprised from the sensor unit 30 arrange | positioned in.

  As shown in FIG. 2, the tire valve 20 is formed by attaching a rubber body portion 22 to an outer peripheral surface of a valve stem 21 formed in a cylindrical shape from a metal material. An introduction path (not shown) is formed in the valve stem 21. In the tire valve 20, a mounting groove 24 is recessed over the entire circumference of the body portion 22 on the outer peripheral surface of the body portion 22 on the sensor unit 30 side. A valve mechanism (not shown) is built in the distal end side of the valve stem 21, and a cap 26 is attached to the distal end of the valve stem 21.

  As shown in FIG. 3, in the tire valve 20, a part of the valve stem 21 protrudes from the body portion 22, and a groove portion 28 is formed on the outer peripheral surface of the protrusion portion 27 over the entire periphery. .

Next, the sensor unit 30 will be described.
As shown in FIGS. 2 and 3, the housing 31 of the sensor unit 30 is formed of a resin material or a metal material, and the state of the tire 12 (for example, the temperature or pressure in the tire 12) is stored in the housing 31. A sensor 32 to be detected is accommodated. Further, the housing 31 includes various electronic components, a battery, an antenna, and the like, and a transmitter for transmitting the detected state of the tire 12 to the receiver.

  On the outer surface of the housing 31, an inclined surface 33 that is inclined upward from the edge of the housing 31 toward the back of the housing 31 is provided. A pair of wall portions 41 are erected on the inclined surface 33 side by side in the inclined direction of the inclined surface 33, and the both wall portions 41 have circular shapes penetrating in the thickness direction of the wall portions 41. An insertion hole 42 is formed. The dimension between the opposing inner surfaces of the pair of wall portions 41 is the same as the dimension along the axial direction of the valve stem 21 in the groove portion 28. The diameter of the insertion hole 42 is slightly larger than the outer diameter of a portion different from the groove portion 28 in the protruding portion 27.

  A pair of connecting walls 43 are erected on the inclined surface 33. Each connecting wall 43 has a plate shape and extends between the pair of wall portions 41. The pair of connecting walls 43 are provided along the inclined surface 33 with an interval in a direction orthogonal to the inclined direction. When the mutually facing surfaces of the pair of connecting walls 43 are the inner surfaces and the surfaces opposite to the inner surfaces are the outer surfaces, the outer surfaces of the pair of connecting walls 43 are provided with recesses 44 that are recessed in the thickness direction of the connecting walls 43. Yes.

  The protruding portion 27 of the valve stem 21 is inserted into the insertion hole 42 provided in the pair of wall portions 41. The valve stem 21 is disposed such that the groove portion 28 is located between the wall portions 41. In other words, the valve stem 21 has the groove portion 28 on the outer peripheral surface located between the pair of wall portions 41. The tire valve 20 and the sensor unit 30 are integrated by fitting the stopper 50 into the groove portion 28 of the valve stem 21. Details will be described below.

  As shown in FIGS. 3 and 4, the stopper 50 includes a fitting portion 51 having a U shape, and the fitting portion 51 has a pair of sandwiching portions 53 that are opposed to each other and have a rectangular parallelepiped shape. Yes. The dimension between the inner surfaces which a pair of clamping part 53 opposes is a little larger than the outer diameter of the part in which the groove part 28 in the protrusion part 27 was formed. From the outer surface of each clamping part 53, a pair of arm parts 52 extend so as to face each other with the pair of clamping parts 53 interposed therebetween, and at the tip of each arm part 52, each arm part 52 faces the clamping part 53. The nail | claw part 55 which protrudes is provided. The stopper 50 is made of an elastically deformable material (for example, a polyamide resin or a metal material).

  As shown in FIGS. 4 and 5, the stopper 50 configured as described above is inserted between the pair of wall portions 41 such that the pair of sandwiching portions 53 sandwich the protruding portion 27. The fitting portion 51 of the stopper 50 is fitted into the groove portion 28, and the claw portion 55 of the stopper 50 is engaged with the concave portion 44 of the connecting wall 43. Accordingly, the stopper 50 is attached to the housing 31 in a state where the fitting portion 51 is fitted in the groove portion 28. Accordingly, the recess 44 provided in the connecting wall 43 serves as the first locking portion, and the claw portion 55 provided in the arm portion 52 serves as the second locking portion. Further, the arm portion 52 becomes an attachment portion for attaching the stopper 50 to the housing 31.

Next, the operation of the tire valve unit 10 of the present embodiment will be described.
When the tire valve 20 moves in the direction along the axial direction of the valve stem 21 so as to come out from the insertion hole 42, the fitting portion 51 of the stopper 50 and the edge portion on the tip side of the protruding portion 27 in the groove portion 28 are engaged. Stop each other. The stopper 50 is restricted from moving in the direction along the axial direction of the valve stem 21 by contacting the fitting portion 51 and the wall portion 41 (the wall portion 41 on the proximal end side of the protruding portion 27). For this reason, the movement of the tire valve 20 in the direction of withdrawal from the insertion hole 42 is restricted.

  When the tire valve 20 tries to move in the insertion direction into the insertion hole 42 in the direction along the axial direction of the valve stem 21, the edge portion on the proximal end side of the protruding portion 27 in the fitting portion 51 of the stopper 50 and the groove portion 28 is formed. Lock together. The stopper 50 is restricted from moving in the direction along the axial direction of the valve stem 21 by contacting the fitting portion 51 and the wall portion 41 (the wall portion 41 on the distal end side of the protruding portion 27). For this reason, the movement of the tire valve 20 in the insertion direction into the insertion hole 42 is restricted. Therefore, the movement of the tire valve 20 in both directions along the axial direction of the valve stem 21 is restricted by the stopper 50.

  By the way, as described in Patent Document 1, when the E-ring is mounted in the groove and the movement of the tire valve in the direction along the axial direction of the valve stem is restricted by the E-ring, the holding force of the tire valve by the E-ring In order to improve (force that restricts the movement of the tire valve, resistance to shearing of the E-ring, etc.), it is necessary to make the E-ring thick. When the E-ring is made thicker, the rigidity of the E-ring is improved accordingly. When installing the E-ring in the groove, it is necessary to deform the E-ring and install it in the groove. If the rigidity of the E-ring is improved, the E-ring cannot be attached or even if it can be attached, it is troublesome. It takes. That is, when the E-ring is made thicker, the attachment of the E-ring to the valve stem is deteriorated.

  The stopper 50 of this embodiment is attached to the housing 31 by the claw portion 55 formed on the arm portion 52 being engaged with the concave portion 44, whereby the fitting state of the fitting portion 51 to the groove portion 28 is set. Maintained. In order to improve the holding force of the valve stem 21 by the stopper 50, even if the fitting portion 51 is thickened, it is not necessary to deform the fitting portion 51 and fit the groove portion 28 like an E-ring. That is, the attachment property of the stopper 50 does not depend on the thickness of the fitting portion 51 but depends only on the arm portion 52. Therefore, even if the fitting portion 51 is thickened, the attachment property of the stopper 50 does not deteriorate. For this reason, the holding force of the valve stem 21 can be improved while preventing the attachment of the stopper 50 from being deteriorated.

Therefore. According to the above embodiment, the following effects can be obtained.
(1) In the tire valve unit 10, the fitting portion 51 of the stopper 50 is fitted into the groove portion 28 of the valve stem 21, and the claw portion 55 of the stopper 50 is engaged with the recess 44 of the connecting wall 43. The movement of the tire stem 20 in both directions along the axial direction of the valve stem 21 is restricted by the edge of the groove 28 and the stopper 50 engaging each other, and the stopper 50 abutting against each wall 41. For this reason, the movement of the tire valve 20 in both directions (insertion direction and withdrawal direction) along the axial direction of the valve stem 21 is restricted.

  (2) Since the movement of the tire valve 20 is regulated by the stopper 50, it is not necessary to regulate the movement of the tire valve 20 in the insertion direction by the body part 22, and a force is not easily applied to the body part 22. Therefore, deformation of the body portion 22 is suppressed.

  (3) The stopper 50 is attached to the housing 31 by the claw portion 55 formed on the arm portion 52 being engaged with the concave portion 44. For this reason, even if the fitting part 51 is made thick in order to improve the holding force of the valve stem 21, the stopper 50 can be easily attached.

  (4) Since the stopper 50 is attached to the housing 31 by locking the claw portion 55 and the recess 44, the stopper 50 is attached without using a member for attaching the stopper 50 to the housing 31. The stopper 50 can be easily attached.

(5) The insertion hole 42 of each wall 41 has a circular shape. For this reason, it is easy to insert the valve stem 21 into the insertion hole 42.
(6) It is also conceivable to attach the tire valve 20 to the sensor unit 30 by forming a male screw on the outer peripheral surface of the valve stem 21 and screwing a nut into the male screw. In this case, for the purpose of preventing rotation of the valve stem 21 due to screwing of the nut, a part of the outer peripheral surface of the valve stem 21 is made flat and the inside of the insertion hole 42 is in surface contact with the flat surface. Form a peripheral surface. When the stopper 50 is fitted in the groove 28 as in the present embodiment, the tire valve 20 and the sensor unit 30 can be integrated even if the tire valve 20 rotates. For this reason, it is not necessary to provide a flat surface on the inner peripheral surface of the valve stem 21 or the insertion hole 42 in order to prevent the tire valve 20 from rotating together. Therefore, the formation of the insertion hole 42 is facilitated.

  (7) It is not necessary to attach the tire valve 20 to the sensor unit 30 by forming a male screw on the outer peripheral surface of the valve stem 21 and screwing a nut into the male screw. For this reason, it is not necessary to form a male screw in the valve stem 21, and the manufacture of the valve stem 21 is facilitated. Further, since it is not necessary to screw the nut, the work of fixing the tire valve 20 to the sensor unit 30 is facilitated, and the sensor unit 30 and the tire valve 20 are easily integrated.

(8) Since the fitting part 51 has the clamping part 53 which clamps the protrusion part 27, the movement to the radial direction of the valve stem 21 can be controlled by the clamping part 53. FIG.
(Second Embodiment)
Hereinafter, a second embodiment in which the tire valve unit is embodied will be described. Note that in the second embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

As shown in FIGS. 6 and 7, the protruding portion 27 of the valve stem 21 of the present embodiment is formed with a through hole 71 that penetrates a part of the peripheral wall of the valve stem 21 in the thickness direction.
The housing 80 of the sensor unit 30 has a rectangular plate-like first wall portion 81 standing from one side of the outer surface, and a rectangular plate-like shape that is spaced from the first wall portion 81 and is erected from the outer surface. The second wall portion 82 is provided. The dimension between the first wall part 81 and the second wall part 82 is slightly smaller than the dimension of the through hole 71 along the axial direction of the valve stem 21. In the following description, the opposing direction of the first wall portion 81 and the second wall portion 82 will be described as the thickness direction of the wall portions 81 and 82.
The pair of wall portions 81 and 82 are formed with circular insertion holes 42 penetrating in the thickness direction of the wall portions 81 and 82. On the outer surface of the housing 80, a pair of abutting walls 83 extending along the thickness direction of the first wall portion 81 from both ends in the direction perpendicular to the standing direction and the thickness direction of the first wall portion 81 are provided. ing. The pair of abutting walls 83 has a rectangular shape and is provided so as to sandwich the insertion hole 42 formed in the first wall portion 81. In the contact wall 83, the dimension in the direction along the facing direction of the first wall part 81 and the second wall part 82 is larger than the dimension between the first wall part 81 and the second wall part 82. Short. In the abutting wall 83, a first locking portion 84 that projects in the thickness direction of the abutting wall 83 is formed at the distal end in the projecting direction from the housing 80.

  The valve stem 21 is disposed such that the through hole 71 is positioned between the pair of wall portions 81 and 82. Therefore, the axial direction of the valve stem 21 and the thickness direction of the first wall portion 81 and the second wall portion 82 are the same direction. For this reason, it can be said that the abutting wall 83 extends on the outer surface of the housing 80 along the axial direction of the valve stem 21. A stopper 90 is fitted in the through hole 71 of the valve stem 21.

  As shown in FIGS. 8A and 8B, the stopper 90 is formed by bending a single metal plate, and has a rectangular plate-like base 91 and a pair of opposing bases 91 in the longitudinal direction. The arm portion 92 extends from the side, and the presser portions 94 and 95 extend from a pair of sides facing the short direction of the base portion 91. As the metal plate, for example, a metal plate made of spring steel or iron is used.

  Each arm portion 92 is bent in the same direction of the thickness direction of the base portion 91, and a second locking portion bent so as to be folded back toward the base portion 91 at the tip (end opposite to the base portion). 93 is formed.

  The presser portions 94 and 95 are bent in the same direction in the thickness direction of the base portion 91 and are formed so as to extend from the base portion 91 in a so-called bowl shape. A notch 96 having a trapezoidal shape that is notched in the thickness direction is formed at the distal ends of the presser portions 94 and 95 (the end opposite to the base 91). The holding portions 94 and 95 have an insertion portion 97 inserted into the through hole 71 of the valve stem 21 between the notch 96 and the base portion 91, and sandwiching portions 98 and 99 for sandwiching the valve stem 21 in a portion sandwiching the notch 96. have. The dimension between the outer surfaces of the presser portions 94 and 95 is slightly shorter than the dimension between the opposing surfaces of the first wall portion 81 and the second wall portion 82.

  When one of the presser portions 94 and 95 is a first presser portion 94 and the other is a second presser portion 95, the first presser portion 94 and the second presser portion 95 are different in shape. The second holding portion 95 has a wider width of the holding portions 98 and 99 than the first holding portion 94. Therefore, in the direction along the longitudinal direction of the base portion 91, the dimension from the end of one holding portion 98 to the end of the other holding portion 99 is larger than that of the first holding portion 94. Is longer.

  The stopper 90 described above is inserted between the first wall portion 81 and the second wall portion 82. The arm portion 92 of the stopper 90 is provided between the pair of contact walls 83, and the second locking portion 93 is locked with the first locking portion 84.

  As shown in FIGS. 9 and 10, the insertion portions 97 of the presser portions 94 and 95 are inserted into the through holes 71 of the valve stem 21. The holding portions 98 and 99 of the presser portions 94 and 95 are provided with the valve stem 21 interposed therebetween. The holding portions 98 and 99 of the first presser portion 94 are provided between the contact walls 83. A part of the holding portions 98 and 99 of the second presser portion 95 is an end surface of the contact wall 83 in the direction along the axial direction of the valve stem 21 (on the second wall portion 82 side of the end surface of the contact wall 83). End face).

Next, the operation of the tire valve unit of the present embodiment will be described.
When the tire valve tries to move in the direction of withdrawal from the insertion hole 42 in the direction along the axial direction of the valve stem 21, the first presser portion 94 and the first wall portion 81 come into contact with each other, so that the valve stem 21. The movement in the direction along the axial direction of is controlled. At this time, in addition to the first pressing portion 94 and the first wall portion 81 being in contact with each other, a part of the clamping portions 98 and 99 of the second pressing portion 95 and the valve stem 21 on the contact wall 83 are The stopper 90 can restrict the movement of the valve stem 21 in the direction along the axial direction at a plurality of locations by contacting the end surface in the direction along the axial direction. That is, the clamping parts 98 and 99 of the second presser part 95 function as contact parts.

Therefore, according to the above embodiment, in addition to the effects (1), (2), (4), (5) of the first embodiment, the following effects can be obtained.
(9) The stopper 90 is restricted from moving in the direction along the axial direction of the valve stem 21 at a plurality of locations (the first pressing portion 94 and a part of the clamping portions 98 and 99 of the second pressing portion 95). Therefore, the tire valve can be further restricted from moving in the direction along the axial direction of the valve stem 21.

  (10) The stopper 90 restricts the movement of the valve stem 21 at a plurality of locations. For this reason, the force applied to the stopper 90 is distributed to a plurality of locations. For this reason, the stopper 90 is restricted from being deformed or damaged by a force along the axial direction of the valve stem 21. In particular, in the case of the stopper 90 having a bent metal plate, the space between the presser portions 94 and 95 is hollow, and the presser portions 94 and 95 are easily deformed, but the force applied to the stopper 90 is dispersed. As a result, the stopper 90 is not easily deformed.

In addition, you may change embodiment as follows.
○ As shown in FIGS. 11A to 11D, the attachment mode of the stopper 50 may be changed. This will be specifically described below. As shown in FIG. 11A, the arm portion 52 is provided with a claw portion 55 protruding in a direction away from each of the holding portions 53, and the pair of first locking portions 61 so as to sandwich the pair of arm portions 52. May protrude from the housing 31. The stopper 50 is attached to the housing 31 by the first locking portion 61 and the claw portion 55 being locked.

  As shown in FIG. 11 (b), the arm portion 62 may be provided so as to protrude from the tip of each clamping portion 53, and the hole 63 into which the arm portion 62 is inserted may be provided in the housing 31. The entrance of the hole 63 is provided with a projection 68 (first locking portion) protruding into the hole 63, and the stopper 50 is attached to the housing 31 by locking the projection 68 and the claw portion 55. Has been.

  As shown in FIG. 11 (c), the second locking portion that locks with the pair of first locking portions 61 that are provided with the sandwiching portion 53 of the stopper 50 without the arm portion 52 provided on the stopper 50. 64 may be provided on the surface of each clamping portion 53 facing the first locking portion 61.

  As shown in FIG. 11 (d), the stopper 50 is provided with attachment portions 65 extending from the respective holding portions 53 along the outer surface of the housing 31, and a first engagement protruding from the housing 31 to the attachment portion 65. A through hole 66 through which the stop portion 61 is inserted may be provided. The stopper 50 is attached to the housing 31 by the first locking portion 61 inserted through the through-hole 66 being locked with the edge (second locking portion) of the through-hole 66.

  (Circle) as shown to Fig.12 (a) and (b), the attaching part 65 may be attached to the housing 31 with the volt | bolt. This will be specifically described below. As shown in FIG. 12A, a screw hole 67 through which the bolt B <b> 1 is inserted is formed in the housing 31, and the bolt B <b> 1 inserted through the through hole 66 is screwed into the screw hole 67. 50 may be attached to the housing 31. Instead of the screw hole 67, a nut to which the bolt B1 is screwed may be embedded in the housing 31.

  As shown in FIG. 12B, even if the stopper 50 is attached to the housing 31 by insert-molding the bolt B <b> 2 into the housing 31 and screwing the nut N into the bolt B <b> 2 inserted through the through hole 66. Good. When attaching the attachment part 65 with the bolts B1 and B2, it is not necessary to deform the attachment part 65. For this reason, you may form the stopper 50 other than the material which can be elastically deformed.

  As shown in FIG. 13, the number of the connection walls 43 may be one. Two through holes 69 are provided in the connecting wall 43, and an arm portion 62 provided at the tip of the holding portion 53 of the stopper 50 is inserted into each through hole 69. The claw portion 55 provided at the tip of the arm portion 62 is locked with the edge (first locking portion) of the through hole 69. That is, the stopper 50 may be inserted between the wall portions 41 toward the side other than the outer surface of the housing 31.

  In the first embodiment, the dimension along the axial direction of the valve stem 21 in the groove portion 28 of the valve stem 21 may be larger than the thickness of the fitting portion 51. Further, the dimension along the axial direction of the valve stem 21 in the groove portion 28 of the valve stem 21 may not be the same as the dimension between the opposing inner surfaces of the wall portion 41 and may be changed as appropriate.

○ ○ In the first embodiment, the thickness of the fitting portion 51 may be appropriately changed as long as it can fit into the groove portion 28.
In each embodiment, the shape of the insertion hole 42 is any shape as long as the valve stem 21 (protruding portion 27) can be inserted, such as a polygonal shape such as a square shape or a shape with a part of the flat surface. Also good.

In the first embodiment, the inclined surface 33 is provided on the outer surface of the housing 31, but the inclined surface 33 may not be provided. That is, the outer surface of the housing 31 may be a flat surface.
(Circle) in 1st Embodiment, the groove part 28 does not need to be formed over the perimeter of the valve stem 21. FIG.

In the first embodiment, a through hole may be provided instead of the groove 28.
O You may provide the contact part which contacts the contact wall in the stopper 50 of 1st Embodiment.
In the second embodiment, the clamping portions 98 and 99 of the stopper 90 are brought into contact with the end surface of the contact wall 83 in the direction along the axial direction of the valve stem 21 on the second wall portion 82 side. However, when there is a gap in which the clamping portions 98 and 99 are inserted between the contact wall 83 and the first wall portion 81, the clamping portions 98 and 99 are the first wall portion 81 of the contact wall 83. You may contact | abut to the end surface of the side. In this case, when the tire valve is about to move in the insertion direction among the directions along the axial direction of the valve stem 21, the holding portions 98 and 99 and the contact wall 83 come into contact with each other, so that the stopper 90 has a plurality of positions. Thus, the tire valve can be restricted from moving in the direction along the axial direction of the valve stem 21. Further, of the end surfaces of the contact wall 83 in the direction along the axial direction of the valve stem 21, the sandwiching portions 98 and 99 are provided on both the end surface on the first wall portion 81 side and the end surface on the second wall portion 82 side. You may make it contact | abut. In this case, the first presser portion 94 and the second presser portion 95 may have the same shape.

  In the second embodiment, the stopper 90 may not be in contact with the end surface of the contact wall 83 in the direction along the axial direction of the valve stem 21. In other words, the holding portions 98 and 99 of the first pressing portion 94 and the second pressing portion 95 may be configured to be positioned between the pair of contact walls 83. In this case, in the stopper 90, it is preferable that the first pressing portion 94, each arm portion 92, and the second pressing portion 95 are in contact with each other in the direction along the axial direction of the valve stem 21. Of the directions along the axial direction of the valve stem 21, when the tire valve tries to move in the direction of withdrawal from the insertion hole 42, the first presser portion 94, each arm portion 92, and the second presser portion 95 come into contact with each other. Therefore, the force applied to the stopper 90 is distributed to each part. Similarly, even if the tire valve tries to move in the direction of insertion into the insertion hole 42 in the direction along the axial direction of the valve stem 21, the first presser portion 94, the respective arm portions 92, and the second presser portion 95 are moved to each other. The force applied to the stopper 90 is dispersed. For this reason, deformation and breakage of the stopper 90 can be suppressed. In this case, the first pressing portion 94 and the second pressing portion 95 of the stopper 90 may have the same shape.

Next, a technical idea that can be grasped from the embodiment and the modified examples will be additionally described below.
(A) The tire valve unit according to any one of claims 1 to 4, wherein the fitting portion includes a pair of clamping portions that clamp the valve stem.

  (B) The tire valve unit according to claim 1, wherein the attachment portion is attached to the housing by a bolt.

  H: Wheel for vehicle, 10: Tire valve unit, 11: Rim, 20 ... Tire valve, 21 ... Valve stem, 28 ... Groove, 30 ... Sensor unit, 31 ... Housing, 32 ... Sensor, 41 ... Wall, 42 ... Insertion hole, 44 ... concave portion, 50, 90 ... stopper, 51 ... fitting portion, 55 ... claw portion.

Claims (4)

A tire valve provided with a valve stem and mounted on a rim of a vehicle wheel;
A tire valve unit that is arranged in a tire mounted on the vehicle wheel and that integrates a sensor unit that detects the state of the tire,
The sensor unit includes a housing in which the sensor is accommodated,
The housing has a pair of wall portions that protrude from the outer surface with a space therebetween, and the valve stem is inserted through insertion holes of each of the wall portions,
The valve stem has a groove or a through hole on an outer peripheral surface located between the pair of wall portions,
A stopper inserted between the pair of wall portions, the stopper having a fitting portion fitted into the groove portion or the through hole, and an attachment portion attached to the housing. Tire valve unit. The housing has a first locking portion;
The tire valve unit according to claim 1, wherein the attachment portion includes a second locking portion that locks with the first locking portion. A contact wall extending in a direction along the axial direction of the valve stem is provided on the outer surface of the housing,
3. The tire valve unit according to claim 1, wherein the stopper has a contact portion that contacts an end surface of the contact wall in a direction along the axial direction of the valve stem.   The tire valve unit according to any one of claims 1 to 3, wherein the insertion hole has a circular shape.