JP2014008935A - Valve stem of radio tire pressure detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate removal, with a pipe and a hollow and elastic installation part, in a valve stem for gripping a radio tire pressure detector.SOLUTION: A pipe 10 comprises a gas inflow port end 11, a connection end 12, a lower flange 13, an upper flange 14 and an annular groove 15. The lower flange 13 is formed annularly in the pipe and protrudingly in the radial outer direction in the vicinity of a connection end. The upper flange 14 is formed annularly in the pipe and protrudingly in the radial outer direction in the vicinity of the gas inflow port end. An installation body 20 is fixed to an outer peripheral surface of the pipe between both the flanges 13 and 14, and the installation body comprises an engaging part 21, an installation part 22, an installation hole and an annular projection part 26. The engaging part abuts on the lower flange. The installation part is integrally formed with the engaging part, and abuts on the upper flange. The annular projection part is formed protrudingly in the radial inner direction on an inner surface of the installation body, and engages with the annular groove.

Description

  The present invention relates to a valve stem, and more particularly to a valve stem that can be easily attached to and detached from a wireless tire pressure detector and that can easily receive and support the wireless tire pressure detector.

  Conventional tire pressure monitoring systems (TPMS) are classified into direct TPMS and indirect TPMS. The direct type TPMS can hold the tire in a stable state by attaching a tire pressure detector to the tire, directly detecting the tire pressure, and notifying the driver of the actual tire pressure. The indirect TPMS detects a tire pressure by providing a wheel speed sensor in an automobile brake system and comparing a difference in vehicle speed between the wheels of the automobile. With the development of wireless communication technology, direct TPMS is becoming mainstream when assembled in various automobiles.

  A conventional direct TPMS is attached to the rim and connected to the vehicle's electronic system via wireless communication to inform the user of the tire pressure. To attach a conventional direct TPMS wireless tire pressure detector to the rim, a metal valve stem is attached through the rim, connected to the wireless tire pressure detector, and having a tube and an outer fuselage . The tube has a connecting end and a gas inlet end. The connection end of the valve stem extends into the rim, is connected to the wireless tire pressure detector, and has a shape corresponding to the shape of the wireless tire pressure detector. A bolt is attached to the wireless tire pressure detector in a penetrating manner and is connected to the valve stem to connect the valve stem to the wireless tire pressure detector. The gas inlet end of the valve stem extends from the rim to the outside. The outer body is made of a rubber material and is fixed around the pipe by a predetermined connecting technique. The outer body is in contact with the rim and has a sealing effect on the tire.

  However, since the conventional valve stem is attached to the rim of the tire, when the tire receives an impact or collision from the outside, the outer body is compressed and cannot be in close contact with the tire rim, and is enclosed in the tire. This causes air leakage. In addition, because the tires are filled with ozone, the rubber is easily oxidized by ozone, the outer body loses elasticity and needs to be replaced with a new valve stem in the next year. Further, the outer body of the conventional valve stem is secured around the tube and cannot be easily separated from the tube. The user needs to warm and comb the outer body, or when the body is used, the outer body is directly damaged. Thus, it is difficult to replace the valve stem, and the valve stem replacement requires a special procedure.

  Another conventional valve stem for a wireless tire pressure detector includes a tube, a mounting member, and an annular ring. The tube has a connection end and a gas inlet end. The attachment member is made of a rubber material, and is attached to the periphery of the tube between the connection end of the tube and the gas inlet end, and has a large diameter portion adjacent to the connection portion of the tube for engaging the inner wall of the rim. The annular ring is screwed to the cylindrical portion, and by engaging with the outer wall of the rim, the attachment member is fitted to the rim, and a sealing effect on the tire can be obtained. However, when replacing the valve stem, the annular ring must be rotated and separated from the tube, and this operation is time consuming. Furthermore, in order to prevent the rim from being damaged by the annular ring or to prevent the threaded portion of the annular ring from being damaged, a screw coupling device having a torsional force measuring device is required in the work, which makes the replacement work inconvenient. To.

  Furthermore, the conventional wireless tire pressure detector has an antenna connected to a pressure monitoring device mounted in the vehicle, which increases the volume of the conventional wireless tire pressure detector attached to the rim. . Furthermore, the antenna can be attached to the conventional wireless tire pressure detector so as not to be visible from the outside. In this case, however, the connection effect between the conventional wireless tire pressure detector and the tire pressure monitoring device is affected. Become. The valve stem for a wireless tire pressure detector according to the present invention can alleviate or avoid the above-described problems.

JP 2009-214833 A

A main object of the present invention is to provide a valve stem that can be easily attached to and detached from a wireless tire pressure detector and that can suitably receive and support the wireless tire pressure detector.
A valve stem for gripping a wireless tire pressure detector according to the present invention includes a tube, a hollow and elastic mounting body, and the like. The tube has a gas inlet end, a connection end, a lower flange, an upper flange, and an annular groove. The lower flange is formed in an annularly and radially outwardly projecting manner on the tube in the vicinity of the connecting end. The upper flange is formed in an annularly and radially outwardly projecting manner on the tube in the vicinity of the gas inlet end. An annular groove is formed between the flanges on the outer peripheral surface of the pipe. The mounting body is fixed to the outer peripheral surface of the pipe between both flanges, and the mounting body has an engaging portion, a mounting portion, a mounting hole, and an annular projection. The engaging portion is in contact with the lower flange. The attachment portion is formed integrally with the engagement portion, and protrudes from the upper flange. The annular protrusion is formed in an annular shape on the inner peripheral surface of the mounting body so as to protrude radially inward in the mounting hole, and engages with the annular groove to fix the mounting body to the outer peripheral surface of the pipe. To do.

  Other objects, advantages, and novel technical features of the present invention will become more apparent from the following detailed description of the invention, which will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a developed perspective view showing a first embodiment of a valve stem for a wireless tire pressure detector according to the present invention and a wireless tire pressure detector. FIG. 2 is a developed perspective view of the valve stem shown in FIG. 1. It is a side view which shows a part of valve stem shown in FIG. It is an operation | movement side view which shows a part of valve stem shown in FIG. 1, and shows the holding state of the valve stem and radio | wireless tire pressure detector which were attached to the rim | limb of the tire. FIG. 3 is a developed perspective view showing a second embodiment of a valve stem for a wireless tire pressure detector and a wireless tire pressure detector according to the present invention. FIG. 6 is a developed perspective view of the valve stem shown in FIG. 5. It is a side view which shows a part of valve stem shown in FIG.

  Referring to FIG. 1, a valve stem for a wireless tire pressure detector 40 having a connection hole having a predetermined shape according to a first embodiment of the present invention includes a hollow tube 10, a hollow and elastic A mounting body 20 having a cover and a cover 30 are provided.

  2 and 3, the tube 10 has an outer peripheral surface, a gas inlet end 11, a connection end 12, a lower flange 13, an upper flange 14, and an annular groove 15. ing.

  The tube 10 is made of metal and is suitably used as an antenna for the wireless tire pressure detector 40. The gas inlet end 11 of the tube 10 is a portion that connects the tube 10 to the tire inflation device, and the gas inlet end 11 has an outer peripheral surface, and an outer threaded portion 111 is formed on the outer peripheral surface. The connection end 12 of the tube 10 is formed integrally with the gas inlet end 11 and has a shape corresponding to the shape of the connection hole of the wireless tire pressure detector 40. Further, the connection end 12 has a gas hole 121 at the tube. 10 is formed so as to penetrate the outer peripheral surface in the radial direction.

  The lower flange 13 has a disk shape, and is annular on the outer peripheral surface of the tube 10 so as to protrude radially outward from the outer peripheral surface of the tube 10 at a position close to the connection end 12 of the tube 10. Formed and having a predetermined diameter. The upper flange 14 is formed in an annular shape on the outer peripheral surface of the pipe 10 so as to protrude radially outward at a position close to the outer threaded portion 111 of the gas inlet end 11 of the pipe 10. It has an end, a top end, a maximum diameter portion, and a minimum diameter portion. The top end of the upper flange 14 is adjacent to the outer threaded portion 111 of the gas inlet end 11. The maximum diameter portion of the upper flange 14 is provided at the bottom end of the upper flange 14. The minimum diameter portion of the upper flange 14 is provided at the top end of the upper flange 14. The diameter of the upper flange 14 gradually decreases from the bottom end to the top end. Furthermore, the maximum diameter of the upper flange 14 is smaller than the diameter of the lower flange 13. The annular groove 15 is formed on the outer peripheral surface of the tube 10 and between the lower flange 13 and the upper flange 14.

  The mounting body 20 is made of a rubber material having elasticity, and is fixed to the outer peripheral surface of the pipe 10 between the upper and lower flanges 13 and 14, and includes a bottom end, a top end, an inner peripheral surface, an engagement portion 21, and an attachment portion. 22, a holding portion, an attachment hole 24, an attachment recess 25, and an annular protrusion 26. The engaging portion 21 is formed so as to protrude radially outward at the bottom end of the mounting body 20, abuts against the lower flange 13 of the tube 10, has a predetermined diameter, and has a top surface and a bottom surface. . The attachment portion 22 is formed so as to protrude radially outward at the top end of the attachment body 20, is formed integrally with the engagement portion 21 of the attachment body 20, and is in contact with the upper flange 14 of the tube 10. The attachment portion 22 has a top end and a bottom end, and has a predetermined diameter. The top end of the attachment portion 22 is in contact with the bottom end of the upper flange 14. The diameter of the attachment portion 22 gradually decreases from the bottom end toward the top end. The diameter of the mounting portion 22 is set smaller than the diameter of the engaging portion 21.

  The holding portion is on the mounting body 20 and is formed between the engaging portion 21 and the mounting portion 22 so as to protrude outward in the radial direction. The holding recess 23, the mounting groove 231, and the first contact ring 232 and a second contact ring 233. The holding recess 23 is formed in an annular shape on the top surface of the engaging portion 21. The mounting groove 231 is formed in an annular shape around the mounting portion 22 above the holding recess 231. The first contact ring 232 is formed in an annular shape on the top surface of the engaging portion 21 around the holding recess 23 and below the mounting groove 231. The second abutment ring 233 is formed in an annular shape in the attachment portion 22 in a state of protruding radially outward above the attachment groove 231.

  The attachment hole 24 is formed through the engagement portion 21 and the attachment portion 22 of the attachment body 20 in the axial direction, and has a predetermined diameter. The mounting recess 25 is formed so as to penetrate the bottom surface of the engaging portion 21 in the axial direction, communicates with the mounting hole 24, and is mounted around the lower flange 13 of the pipe 10.

The diameter of the mounting recess 25 is set larger than the diameter of the mounting hole 24. The annular protrusion 26 is formed in an annular shape on the inner peripheral surface of the attachment body 20 so as to protrude radially inward between the engagement portion 21 and the attachment portion 22 in the attachment hole 24. The mounting body 20 is fixed to the outer peripheral surface of the tube 10 by engaging with the annular groove 15.
The cover 30 is connected to the gas inlet end 11 of the tube 10, and the inner screw portion thereof is screwed to the outer screw portion 111 of the gas inlet end 11.

  Referring to FIG. 1, the connection end 12 of the pipe 10 is connected to a wireless tire pressure detector 40. Since the tube 10 is made of metal, it can be used as an antenna for the wireless tire pressure detector 40. Moreover, the strength of the connecting portion can be increased by making the tube 10 made of metal, and the directivity of the wireless signal transmission of the wireless tire pressure detector 40 can be improved.

  As described above, since the attachment body 20 has elasticity, it can be attached between the flanges 13 and 14 on the outer peripheral surface of the tube 10 by being deformed. When the attachment body 20 is attached to the pipe 10, the attachment portion 22 comes into contact with the upper flange 14, the engagement portion 21 comes into contact with the lower flange 13, and the annular protrusion 26 engages with the annular groove 15. Therefore, the mounting body 20 can be mounted on the outer peripheral surface of the tube 10 and between the flanges 13 and 14 in a surely positioned state, the slipping of the mounting body 20 with respect to the tube 10 can be prevented, and the mounting body 20 can be attached. By attaching the mounting recess 25 of the body 20 around the lower flange 13 of the tube 10, the mounting body 20 can be held on the tube 10 more effectively.

  Referring to FIG. 4, in the valve stem according to the first embodiment of the present invention, the valve stem extends in the hole 51 of the rim 50 in order to extend the gas inlet end 11 to the outside of the rim 50. The rim 50 is attached so as to penetrate from one side to the other side. The connection end 12 is attached to the inside of the rim 50 and connected to the wireless tire pressure detector 40. When the valve stem is attached to the rim 50, the attachment body 20 can be deformed, so that the attachment body 20 can be attached to the rim 50 in a state of passing through the hole 51 of the rim 50. The diameter of the mounting portion 22 of the mounting body 20 is larger than the diameter of the hole 51 of the rim 50. Therefore, between the engagement portion 21 and the attachment portion 22, the hole 5 of the rim 50 is securely engaged with the attachment body 20, and in addition to the hole 51, the contact rings 232 and 233 are respectively connected to the outside of the rim 50. The hole 51 can be brought into contact with the inside. Moreover, the sealing effect of the rim | limb 50 can be heightened with an above-described structure.

  When the user wants to replace the mounting body 20, the mounting body 20 can be removed from the hole 51 of the rim 50 by pulling the valve stem. At this time, by applying a force for deforming the mounting body 20 to the mounting body 20 from the outside, the mounting body 20 can be tubed without using a special tool, and without heating or melting the mounting body 20. 10 can be removed. Further, the abutment rings 232 and 233 of the mounting body 20 allow the mounting body 20 to be in close contact with the rim 50, so that when the tire is subjected to an impact or collision from the outside, the mounting body 20 The detachment from the rim 50 can be prevented.

  Hereinafter, the valve stem for the wireless tire pressure detector 40 according to the second embodiment of the present invention will be described with reference to FIGS. The valve stem according to the present embodiment is formed in an annular shape with the upper flange 14a projecting radially outward on the outer peripheral surface of the tube 10 at the outer threaded portion 111 of the gas inlet end 11 of the tube 10, and Except for having a flat shape, it has a structure and relationship similar to those of the valve stem according to the first embodiment. The mounting body 20 further includes an extending portion 27 that is integrally formed with the mounting portion 22 on the side opposite to the engaging portion 21 and that contacts the upper flange 14a.

  The valve stem for the wireless tire pressure detector 40 having the above-described configuration has the following effects.

  The valve stem according to the present invention has an elastic mounting body 20 fixed between the flanges 13, 14 (14 a) of the tube 10, and the annular protrusion 26 of the mounting body 20 is engaged with the annular groove 15 of the tube 10. Accordingly, the mounting body 20 can be securely attached to the tube 10. Further, when the mounting body 20 needs to be replaced, the mounting body 20 can be deformed and removed from the tube 10 by applying a force from outside without using a special tool. The above-described configuration facilitates assembly and maintenance of the valve stem.

  The annular protrusion 26 of the mounting body 20 gives a suitable holding effect to the mounting body 20 by engaging with the annular groove 15 of the tube 10. Further, when the valve stem is attached to the hole 51 of the rim 50, the contact rings 232 and 233 contact the side surfaces of the rim 50 in the vicinity of the hole 51, respectively, so that the attachment body 20 is separated from the rim 50. To prevent.

  In the valve stem according to the present invention, in order to remove the mounting body 20 from the tube 10, only a simple tool or manual work is required without heating or melting the mounting body 20. In an assembly plant, it can be widely used without disassembling and assembling equipment by specialists, and the cost of the valve stem can be reduced.

  The tube of the valve stem according to the present invention is made of a metal material and can be used as an antenna. Therefore, the intensity | strength of the part can be raised and the directivity of radio | wireless signal transmission of the radio | wireless tire pressure detector 40 can be improved. Thereby, the receiving stability of the tire pressure monitoring device in an automobile can be maintained.

Claims (6)

1) A tube configured to be connectable to a wireless tire pressure detector,
i) outer peripheral surface;
ii) a gas inlet end;
iii) a connection end formed integrally with the gas inlet end and connected to the wireless tire pressure detector;
iv) a lower flange formed on the outer peripheral surface of the pipe and in an annular shape so as to protrude radially outward at a position close to the connection end of the pipe;
v) an upper flange formed on the outer peripheral surface of the pipe and in an annular shape in a state protruding in a radially outward direction at a position close to the outer threaded portion of the gas inlet end of the pipe;
vi) the pipe comprising an annular groove formed on the outer peripheral surface of the pipe and between the lower flange and the upper flange;
2) A hollow and elastic mounting body fixed between the lower flange and the upper flange on the outer peripheral surface of the pipe,
i) bottom edge;
ii) the apex;
iii) the inner peripheral surface,
iv) an engaging portion formed in a state of projecting radially outward at the bottom end of the mounting body, abutting the lower flange of the tube, and having a top portion;
v) a mounting portion that is formed in a state of projecting radially outward at the top end of the mounting body, is formed integrally with the engaging portion of the mounting body, and abuts against an upper flange of the pipe;
vi) an attachment hole formed in an axial direction through the engagement portion and the attachment portion of the attachment body;
vii) In the mounting hole, on the inner peripheral surface of the mounting body, an annular shape is formed in a state of projecting radially inward between the engaging portion and the mounting portion, and the annular shape of the pipe A valve stem for a wireless tire pressure detector, comprising: the mounting body including an annular protrusion that engages with a groove and fixes the mounting body around the tube. 2. The valve stem according to claim 1, wherein the connection end of the pipe includes a gas hole formed in a radial direction through the outer peripheral surface of the pipe.   The engaging portion has a bottom surface, the mounting hole has a predetermined diameter, and the mounting body is formed on the bottom surface of the engaging portion in the axial direction, communicates with the mounting hole, 3. The valve stem according to claim 1, further comprising a mounting recess that is mounted around the lower flange of the pipe and has a diameter larger than that of the mounting hole. The attachment body includes a holding portion that is formed in a radially outward direction between the engagement portion and the attachment portion, and the holding portion is formed in an annular shape at the top portion of the engagement portion. The valve stem according to claim 1, further comprising: a holding recess that is formed in an annular shape in the mounting portion above the holding recess. The mounting portion has a top end and a bottom end that come into contact with the upper flange, and a diameter of the mounting portion gradually decreases from the bottom end of the mounting portion toward the top end. Item 3. The valve stem according to Item 1 or 2. The holding portion of the attachment body includes a first contact ring formed in an annular shape at the top end of the engagement portion, and a second contact ring formed in an annularly projecting state radially outward from the attachment portion. The valve stem according to any one of claims 1 to 5, comprising:

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