CN221737548U - Tyre pressure sensor - Google Patents

Abstract

The utility model relates to the technical field of tire pressure sensors, and in particular to a plastic screw tire pressure sensor, comprising an upper shell, a lower shell, a PCB assembly and an antenna, wherein the upper shell and the lower shell are connected to form an internal space, the antenna and the PCB assembly are arranged in the internal space, the antenna is fixedly connected to the lower shell, the PCB assembly is detachably connected to the lower shell, the antenna is electrically connected to the PCB assembly, the lower shell is made of plastic as a whole, and an internal threaded hole for connecting to a valve is arranged at one end that is not connected to the upper shell. The tire pressure sensor provided by the utility model sets the thread at the connection with the valve to a plastic thread, so that no metal corrosion reaction occurs after the valve is connected to the tire pressure sensor, thereby increasing the durability of the tire pressure sensor.

Description

Tire pressure sensor

Technical Field

The utility model relates to the field of tire pressure sensors, in particular to a plastic screw-thread tire pressure sensor.

Background Art

A tire pressure sensor is a device that monitors the tire pressure of a vehicle. Common tire pressure sensors are small in size and are directly installed on the valve stem of a car tire. They can monitor the tire pressure of a car in real time while the car is driving. Existing tire pressure sensors are connected to the valve stem through metal screws on the bottom shell. Since the valve stem is usually made of metals such as copper and aluminum, this will cause the valve stem to adhere to the metal screw after reaction and cannot be disassembled. The valve stem can only be replaced by disassembling the tire, resulting in a waste of manpower and material resources. This problem needs to be solved urgently.

Utility Model Content

The purpose of the embodiment of the utility model is to provide a plastic screw tire pressure sensor.

An embodiment of the utility model is implemented as follows: a tire pressure sensor includes an upper shell, a lower shell, a PCB assembly and an antenna, wherein the upper shell and the lower shell are connected to form an internal space, the antenna and the PCB assembly are arranged in the internal space, the antenna is fixedly connected to the lower shell, the PCB assembly is detachably connected to the lower shell, the antenna is electrically connected to the PCB assembly, the lower shell is made of plastic as a whole, and an internal threaded hole for connecting to a valve nozzle is provided at one end of the lower shell that is not connected to the upper shell.

Furthermore, the lower portion of the upper shell is provided with an internal thread, and the upper portion of the lower shell is provided with an external thread.

Furthermore, an anti-slip structure is provided on the upper portion of the outer surface of the upper shell.

Furthermore, the anti-skid structure is anti-skid grooves arranged at equal intervals around the outer circumference of the top end of the upper shell.

Furthermore, a groove for accommodating a sealing ring is provided at the bottom of the external thread of the lower shell.

Furthermore, the upper shell and the lower shell are sealed and connected by laser welding.

Furthermore, the tire pressure sensor also includes a battery, which is disposed in the internal space and is electrically connected to the PCB assembly and the antenna.

Furthermore, the tire pressure sensor also includes a gasket, which is arranged between the lower shell and the PCB assembly.

Furthermore, a vent hole is provided in the middle of the gasket, and the vent hole is aligned with the chip at the bottom of the PCB assembly for detecting tire pressure.

Furthermore, the tire pressure sensor also includes a valve plug, and the valve plug is arranged at the bottom of the internal threaded hole.

The utility model has the following beneficial effects: the tire pressure sensor provided by the utility model has the thread at the connection with the valve stem set to a plastic thread, so that no metal corrosion reaction will occur after the valve stem is connected to the tire pressure sensor, thereby increasing the durability of the tire pressure sensor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an exploded view of a tire pressure sensor provided in a first embodiment of the present utility model;

FIG2 is a front view of a tire pressure sensor provided in the first embodiment of the present utility model;

Fig. 3 is a cross-sectional view taken along line B-B of Fig. 2;

FIG4 is an exploded view of a tire pressure sensor provided in a second embodiment of the present invention;

FIG. 5 is a stereoscopic view of a tire pressure sensor provided in accordance with a second embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

The utility model provides a plastic thread tire pressure sensor, the thread of which (i.e. the internal thread hole connecting the tire pressure sensor and the air valve) is made of plastic, thereby avoiding the problem of mutual reaction between the metal internal thread of the existing tire pressure sensor and the air valve when they are connected.

Furthermore, the first embodiment of the utility model provides a plastic screw-thread tire pressure sensor, as shown in Figures 1-3, the plastic screw-thread tire pressure sensor includes an upper shell 11, a lower shell 12, a PCB assembly 13 and an antenna 14, wherein the upper shell 11 and the lower shell 12 are connected to form an internal space, the antenna 14 and the PCB assembly 13 are arranged in the internal space formed by the connection of the upper shell 11 and the lower shell 12, the antenna 14 is fixedly connected to the lower shell 12, the PCB assembly 13 is detachably connected to the lower shell 12, the antenna 14 is electrically connected to the PCB assembly 13, the lower shell 12 is made of plastic as a whole, and an internal threaded hole for connecting the valve stem is provided at the end not connected to the upper shell (see Figure 3).

Furthermore, the upper housing 11 is used to connect with the lower housing 12 to protect the electrical components inside. Specifically, the upper outer surface of the upper housing 11 is provided with an anti-skid structure for users to screw. In this embodiment, the anti-skid structure is an anti-skid groove arranged at equal intervals around the outer periphery of the top of the upper housing 11. In other embodiments, the anti-skid structure can be a strip-shaped protrusion, or the surface of the upper housing 11 can be treated with an anti-skid material. The lower part of the upper housing 11 is provided with an internal thread for connecting with the lower housing 12.

Furthermore, an external thread is provided on the upper portion of the lower shell 12, and a gripping structure is provided on the bottom. The gripping structure processes the bottom of the lower shell 12 into parallel relative sides. The parallel relative sides can facilitate the equipment to better clamp the tire pressure sensor, so as to remove or install the tire pressure sensor.

Furthermore, a through internal threaded hole is provided in the middle of the lower shell 12, and the internal threaded hole is used to connect with the valve stem, so that the air pressure of the tire can be transmitted to the tire pressure sensor through the valve stem, thereby obtaining tire pressure data.

Furthermore, three mounting holes are provided inside the lower housing 12 , and the PCB assembly 13 can be fixed on the lower housing 12 through the mounting holes.

Furthermore, the PCB assembly 13 is detachably connected to the lower housing 12 via screws, and a chip for detecting tire pressure is disposed at the bottom of the PCB assembly 13 .

Furthermore, the antenna 14 in the first embodiment is made into a valve pin shape. The structure is made of metal and can be directly abutted against the valve stem. An air intake channel is provided in the middle of the antenna 14 for receiving the tire pressure. It should be noted that the antenna 14 in the tire pressure sensor is only a partial antenna, which needs to be abutted against the valve core in the valve stem to form a complete antenna and realize the function of the antenna.

Furthermore, the tire pressure sensor also includes a battery 15, which is used to power the tire pressure sensor to ensure the normal operation of the tire pressure sensor. The battery 15 is electrically connected to the PCB assembly 13, and an insulating gasket 18 is provided between the battery 15 and the PCB assembly 13. The insulating gasket 18 is used to isolate the current and prevent the battery from short-circuiting. The insulating gasket 18 is made of an insulating material, such as rubber or plastic.

Furthermore, the tire pressure sensor further includes a gasket 16, which is an IC sealing gasket, which is installed in a preset slot inside the lower shell 12 and abuts against the bottom of the PCB assembly 13. A vent hole is provided in the middle of the gasket 16, and the vent hole is aligned with the chip at the bottom of the PCB assembly 13, so that the chip can detect the tire pressure.

Furthermore, the tire pressure sensor also includes a sealing ring 17 . A groove for placing the sealing ring 17 is provided at the bottom of the external thread of the lower shell 12 . The sealing ring 17 can ensure the airtightness after the lower shell 12 is connected to the upper shell 11 .

Furthermore, the tire pressure sensor also includes a valve plug 19, which is arranged at the bottom of the internal threaded hole of the lower shell 12, and is used to enhance the airtightness after the valve core in the valve mouth is connected to the valve ejector pin.

Furthermore, the second embodiment of the utility model provides a plastic screw-thread tire pressure sensor, as shown in FIG4 and FIG5 , which is different from the plastic screw-thread tire pressure sensor provided in the first embodiment in that the plastic screw-thread tire pressure sensor has a built-in antenna, specifically, the second antenna 24 is a curved strip structure, and the second antenna 24 is provided with multiple bends to increase the antenna area and improve the transmission power. The second antenna 24 is directly connected to the PCB assembly.

Furthermore, the valve ejector pin of the plastic screw tire pressure sensor is made of plastic and is used to be connected to the valve core of the valve stem to receive the tire pressure transmitted from the valve stem.

Furthermore, the upper shell and the lower shell of the plastic screw tire pressure sensor are sealed and connected by laser welding.

The tire pressure sensor provided in the first and second embodiments of the utility model needs to be used in conjunction with a valve. The valve is a standard part commonly used in the tire industry. It is made of metal as a whole, such as copper or aluminum alloy. One end of the valve is connected to the tire, and the other end is provided with an external thread. A valve core is provided in the middle of the end. When the valve is connected to the tire pressure sensor, the valve core abuts against the ejector pin in the tire pressure sensor. At this time, the gas in the tire can be transmitted to the tire pressure sensor through the valve and recognized by the tire pressure sensor. In addition, the valve core itself is a metal column. When it is connected to the ejector pin in the tire pressure sensor in the first embodiment, it also plays a conductive role. At this time, the valve core and the ejector pin together form a complete transmitting antenna.

The tire pressure sensor provided by the utility model is used as follows: align the threaded hole in the lower shell of the tire pressure sensor with the external thread of the valve stem, and screw and connect until the valve core of the valve stem abuts against the tire pressure sensor, and then start using it.

The utility model has the following beneficial effects: the tire pressure sensor provided by the utility model has the thread at the connection with the valve stem set to a plastic thread, so that no metal corrosion reaction will occur after the valve stem is connected to the tire pressure sensor, thereby increasing the durability of the tire pressure sensor.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a tire pressure sensor, its characterized in that, includes casing, lower casing, PCB subassembly and antenna, wherein, go up casing and lower casing and connect, form the inner space, antenna and PCB subassembly set up in the inner space, antenna and lower casing fixed connection, PCB subassembly and lower casing detachable connection, antenna and PCB subassembly electric connection, the whole material of lower casing is the plastic, just the one end that lower casing was not connected with last casing is provided with the internal thread hole that is used for connecting the inflating valve.

2. The tire pressure sensor of claim 1, wherein the upper housing lower portion is provided with internal threads and the lower housing upper portion is provided with external threads.

3. The tire pressure sensor of claim 2, wherein the upper housing has an outer surface provided with an anti-slip structure at an upper portion thereof.

4. A tire pressure sensor as in claim 3, wherein said anti-skid structure is an anti-skid groove disposed at equal intervals around the periphery of the top end of said upper housing.

5. The tire pressure sensor of claim 2, wherein the bottom of the external thread of the lower housing is provided with a groove for placing a seal ring.

6. The tire pressure sensor of claim 1, wherein the upper housing and the lower housing are sealingly connected by laser welding.

7. The tire pressure sensor of any one of claims 1-6, further comprising a battery disposed within the interior space, the battery being electrically connected to the PCB assembly and the antenna.

8. The tire pressure sensor of any one of claims 1-6, further comprising a gasket disposed between the lower housing and the PCB assembly.

9. The tire pressure sensor of claim 8, wherein a vent is provided in the middle of the gasket, the vent being aligned with a chip at the bottom of the PCB assembly for detecting tire pressure.

10. The tire pressure sensor of any one of claims 1-6, further comprising a valve plug disposed at a bottommost portion of the internally threaded bore.