Patent Application
20060144135
1. Field of the Invention
The present invention relates to a multi-functional tire pressure gauge, and more particularly to a multi-functional tire pressure gauge which can measure tire pressure and tread's depth at the same time.
2. Description of the Prior Arts
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
The primary object of the present invention is to provide a multi-functional tire pressure gauge can measure tire pressure and tread's depth simultaneously, when the diaphragm moves up and down under the effect of the tire pressure, the helical seat converts the up-and-down motion of the diaphragm into circular motion, so that the index pointer can display tire pressure value, furthermore, the probe extending in treads of the tire can obtain the depth of the tread.
A multi-functional tire pressure gauge provided in accordance with the present invention comprises: a housing, an air-guide seat, a diaphragm, a helical seat, an annular seat, a tread-measuring device, a display panel and an air-guiding device;
the housing is a [-shaped annular hollow member, on the front end of which are mounted a bush, a transparent piece and a rubber ring, a square hole is defined at a mid section of a peripheral wall of the housing;
the air-guide seat is an annular member having an air hole and is disposed in the housing;
the diaphragm, arranged at the front the air-guide seat, is made of alloy by high temperature processing;
the helical seat, an end of which is connected to the center of the diaphragm and another end of which is provided with an index pointer;
the annular seat is a -shaped annular and hollow member disposed in front of the diaphragm, a front end of the annular seat is provided for pivotally positioning the helical seat, on a peripheral surface of the annular seat is formed a square hole;
the treading measuring device is inserted in the square hole of the housing and the square hole of the annular seat, and comprises a base, a probe, a slide block, a board, a drive gear, a mid gear and a driven gear,
the display panel is fixed to a front end of the annular seat, on the display panel are printed a circular scale for indicating pressure value and a vertical-arranged scale for indicating status of tread of a bicycle;
the air-guide device is a tube connected to the air hole of the air-guide seat, on a mid portion of the air-guide device is disposed a pressure-relief valve which comprises a seat, a moving rod, an O-shaped ring and a spring, at a lower end of the air-guide device is provided an air faucet.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
Referring to
The housing 11 is a [-shaped annular hollow member, on the front end of which are mounted a bush 111, a transparent piece 112 and a rubber ring 113. A square hole 114 is defined at the mid section of the peripheral wall of the housing 11.
The air-guide seat 12 is an annular member having a air hole 121 and is disposed in the housing 11.
The diaphragm 13, arranged at the front the air-guide seat 12, is made of alloy by high temperature processing.
The helical seat 14, an end of which is connected to the center of the diaphragm 13 and another end of which is provided with an index pointer 14.
The annular seat 15 is a -shaped annular and hollow member disposed in front of the diaphragm 13, a front end of the annular seat 15 is provided for pivotally positioning the helical seat 14. On the peripheral surface of the annular seat 15 is formed a square hole 151.
The treading measuring device 16 is inserted in the square holes 114, 151 of the housing 11 and the annular seat 15, and comprises a base 161, a probe 162, a slide block 163, a board 164, a drive gear 165, a mid gear 166 and a driven gear 167. the base 161 is “L”-shaped and includes a lateral portion and a vertical portion, on the lateral portion formed a half-round through hole 1611 which completely penetrates the vertical portion. On the sidewall of the rear end of the vertical portion of the base 161 is formed a groove 1612 for insertion of a limited-slip ring 1613. The probe 162 inserts from the top into the through hole 1611 of the base 161, and the slide of the probe in the axial direction of the through hole 1611 is controlled by the limited-slip ring 1613. The slide block 163 is moveably disposed in the mid section of the through hole 1611 and moves adversely to the probe 162. At the mid portion of the front surface of the slide block 163 is disposed an index pointer 1631, on the side surface of the slide block 163 are provided a plurality of drive teeth 1632. The board 164 is disposed bellow the lateral portion of the base 161. The drive gear 165 and the mid gear 166 are meshed with each other and then are pivotally disposed on the rear surface of the board 164. The driven gear 167 is concentric with the mid gear 166 and is pivotally disposed at the rear surface of the board 164. When the driven gear 167 rotates, the slide block 163 will be caused to move the index pointer 1631 up and down.
The display panel 17 is fixed to the front end of the annular seat 15, on the display panel are printed a circular scale for indicating pressure value and a vertical-arranged scale for indicating the tread status.
The air-guide device 18 is a tube connected to the air hole 121 of the air-guide seat 12, on the mid portion of the air-guide device 18 is disposed a pressure-relief valve 181 which comprises a seat 1811, a moving rod 1812, an O-shaped ring 1813 and a spring 1814. At the lower end of the air-guide device 18 is provided an air faucet 182.
The multi-functional tire pressure gauge 1 can be used to measure the tire pressure and the tread's depth at the same time. When the diaphragm 13 moves up and down under the effect of the tire pressure, the helical seat 14 converts the up-and-down motion of the diaphragm 13 into circular motion, so that the index pointer 141 can display the tire pressure value. Furthermore, the probe 162 extending in the treads of the tire can obtain the depth of the tread.
The multi-functional tire pressure gauge 1 of the present invention uses the probe 162 of the tread-measuring device 16 to insert in the tread of a tire, and then the upper surface of the lateral portion of the base 161 is used to flatly abut against the side surface of the tire. At the time the probe 162 is moving back to the base 161, the slide block 163 will move upward under the effect of the drive gear 165, the mid gear 166 and the driven gear 167, thus the depth of the tread is measured. The backward motion of the probe 162 into the base 161 is slowed down by the limited-slip ring 1613, thus improving the measuring accuracy.
While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
