Tire pressure monitoring system

Abstract

This application provides a tire pressure monitoring device, comprising: a housing, in which an air passage is formed laterally through the housing; receiving spaces are formed on both the upper and lower sides of the air passage within the housing; a through hole is provided on one side of the air passage facing the receiving space; each receiving space is sealed; a copper nozzle rod, passing through the air passage; an air hole is provided on the circumferential surface of the copper nozzle rod that is directly opposite to and communicates with the through hole; an external thread is provided at one end of the copper nozzle rod, and an internal thread is provided at the other end; a PCB board, disposed in the receiving space on the side communicating with the through hole; a processor module, a pressure measuring chip, and a transmitting antenna are disposed on the PCB board; the pressure measuring chip is positioned directly opposite the through hole to detect the air pressure in the copper nozzle rod; and a battery assembly, including a battery and positive and negative terminal connecting pieces; the battery is disposed in another receiving space; and the positive and negative terminal connecting pieces pass through both receiving spaces to be electrically connected to the PCB board. The tire pressure monitoring device provided by this application is small in size and provides stable signal transmission.

Description

Technical Field

[0001] This application belongs to the field of tire pressure monitoring technology, and more specifically, relates to a tire pressure monitoring device. Background Technology

[0002] Tire pressure monitoring systems (TPMS) are typically installed either inside or outside the tire. Specifically, an inside-tire TPMS is usually fixed to the outer circumference of the wheel rim to monitor tire pressure. An outside-tire TPMS is generally connected to the valve stem on the wheel rim, monitoring the tire pressure by measuring the air pressure within the valve. In the second location, the design suffers from several drawbacks. First, the placement of the electronic components within the TPMS results in a large size, and the limited space in the inner wheel wells of medium and large commercial vehicles makes assembly difficult and restricts its use. Second, because the valve stem is made of metal, the TPMS often uses it directly as an antenna transmitter, making its data signal susceptible to external interference. Utility Model Content

[0003] The purpose of this application is to provide a tire pressure monitoring device to solve the technical problems of large size and easy interference of transmission signals in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is to provide a tire pressure monitoring device, which includes:

[0005] A housing having an air passage extending laterally through the housing, and receiving spaces formed on both the upper and lower sides of the air passage, with a through hole provided on one side of the air passage facing the receiving space, and each receiving space being sealed.

[0006] A copper nozzle rod is inserted through the air passage. An air hole is provided on the circumferential surface of the copper nozzle rod, which is directly opposite to and connected to the through hole. An external thread is provided at one end of the copper nozzle rod and an internal thread is provided at the other end.

[0007] A PCB board is disposed in the receiving space on one side connected to the through hole. A processor module, a pressure measuring chip and a transmitting antenna are disposed on the PCB board. The pressure measuring chip is disposed facing the through hole to detect the air pressure in the copper nozzle rod.

[0008] A battery assembly includes a battery and positive and negative electrode connecting pieces. The battery is disposed in another receiving space, and the positive and negative electrode connecting pieces pass through both receiving spaces to be electrically connected to the PCB board.

[0009] Optionally, each of the aforementioned accommodating spaces is filled with epoxy resin or polyurethane.

[0010] Optionally, a sealing cover is provided at the opening of the housing where the battery is located, and the sealing cover is connected to the housing by threads or snaps.

[0011] Optionally, the housing is integrally formed by injection molding.

[0012] Optionally, the copper nozzle rod is fixed in the housing by injection molding.

[0013] Optionally, slots connecting the two receiving spaces are respectively provided in the housing on both sides of the air passage, and the slots are used for the positive and negative electrode connecting pieces to pass through and be electrically connected to the PCB board.

[0014] Optionally, two enclosures are provided in the accommodating space on one side where the battery is located, and the slot is formed in the enclosures; the width of the slot is tapering from large to small in the direction of insertion of the positive and negative electrode connecting pieces, and each positive and negative electrode connecting piece is provided with a guide slope near its free end.

[0015] Optionally, the PCB board is circular; a protruding post is provided in the receiving space where the PCB board is disposed, and a notch is provided on the PCB board to avoid the protruding post.

[0016] Optionally, a gap space is formed between the PCB board and the bottom of the receiving space, and the transmitting antenna is disposed in the gap space.

[0017] The tire pressure monitoring device provided in this application embodiment has at least the following beneficial effects:

[0018] By setting two accommodating spaces on the upper and lower sides of the air passage in the housing, one accommodating space is used to place the battery assembly and the other accommodating space is used to place the PCB board. In this way, the height or depth of each accommodating space is small, so that the overall size of the tire pressure monitoring device is more compact and can be better adapted to the small inner wheel space of medium and large commercial vehicles. At the same time, the transmitting antenna is set on the PCB board. Compared with the setting of the air valve as the antenna in related technologies, its signal transmission is more stable, which is conducive to the stability and effectiveness of tire pressure monitoring. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 and Figure 2This is a perspective view of the tire pressure monitoring device in some embodiments of this application;

[0021] Figure 3 This is a perspective cross-sectional view of the tire pressure monitoring device in some embodiments of this application;

[0022] Figures 4 to 5 These are exploded views of the tire pressure monitoring device from different perspectives in some embodiments of this application. Detailed Implementation

[0023] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0024] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0026] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0029] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0030] Please refer to the following: Figures 1 to 5 The tire pressure monitoring device provided in the embodiments of this application will now be described.

[0031] Understandably, reference Figures 1 to 5The tire pressure monitoring device provided in this application includes a housing 100, a copper nozzle rod 200, a PCB board 300, and a battery 410 assembly 400.

[0032] Specifically, an air passage 110 is formed in the housing 100, extending laterally through the housing 100. Receiving spaces 120 are formed on both the upper and lower sides of the air passage 110, namely a first receiving space 120 and a second receiving space 120. The first receiving space 120 is used to accommodate the aforementioned PCB board 300, and the second receiving space 120 is used to accommodate the aforementioned battery 410 assembly 400. Each receiving space 120 is sealed. Specifically, epoxy resin or polyurethane can be injected into each receiving space 120, or a sealing ring and a sealing cap 130 can be provided at the opening of each receiving space 120. The specific method is not limited to these methods. It should be understood that the aforementioned epoxy resin or polyurethane should be injected after the PCB board 300 and the battery 410 assembly 400 are assembled, in order to achieve sealing and fixation of the PCB board 300 and the battery 410 assembly 400. In addition, a through hole 111 is provided on one side of the airway 110, facing the receiving space 120, and the through hole 111 is connected to the first receiving space 120.

[0033] The copper nozzle rod 200 passes through and is fixedly installed within the air passage 110. An air hole 210 is provided on the circumferential surface of the copper nozzle rod 200, which is directly opposite to and communicates with the through hole 111. The air hole 210 allows high-pressure air in the copper nozzle rod 200 to flow into the first receiving space 120, thereby enabling the pressure measuring chip 310 in the first receiving space 120 to monitor the air pressure in the copper nozzle rod 200. One end of the copper nozzle rod 200 has an external thread, and the other end has an internal thread. The external thread is used to connect the copper nozzle rod 200 to the valve on the wheel hub, and the internal thread is used to connect to the valve of the inflator. Thus, the tire pressure monitoring device of this application can be directly connected to the valve on the wheel hub via the thread, and the inflator can also inflate the tire through the tire pressure monitoring device. Furthermore, during the inflator process, the tire pressure monitoring device can directly monitor the internal pressure of the tire.

[0034] The PCB board 300 is disposed in the first accommodating space 120. Specifically, the PCB board 300 is provided with a processor module, a pressure measuring chip 310 and a transmitting antenna 320. The pressure measuring chip 310 is disposed opposite the through hole 111 to detect the air pressure in the copper nozzle rod 200. The processor module is used to process the tire pressure data monitored by the pressure measuring chip 310 and send the tire pressure data to the transmitting antenna 320. The transmitting antenna 320 then sends the tire pressure data to the receiving terminal (such as a display screen) inside the vehicle's driver's cabin.

[0035] refer to Figure 3Furthermore, a gap space is formed between the PCB board 300 and the bottom of the first accommodating space 120, and the transmitting antenna 320 is disposed in the gap space. It should be understood that, since a connecting seal 170 is provided between the pressure measuring chip 310 and the through hole 111 to prevent air leakage, and the pressure measuring chip 310 has a certain thickness, there is a large gap space between the surface of the PCB board 300 and the bottom of the first accommodating space 120. Based on this, the transmitting antenna 320 is disposed on the inner surface of the PCB board 300 so that it can be located within the gap space, thereby achieving effective utilization of the gap space. At the same time, it can also avoid placing components on the outer surface of the PCB board 300 (that is, the side facing the opening of the first accommodating space 120), which would occupy too much space between the outer surface of the PCB board 300 and the opening of the first accommodating space 120. In other words, the gap between the outer surface of the PCB board 300 and the opening of the first accommodating space 120 can be minimized as much as possible, which is conducive to the miniaturization of the first accommodating space 120, and thus also conducive to the miniaturization of the housing 100.

[0036] refer to Figures 3 to 5 The battery assembly 400 is disposed in the second receiving space 120, and includes the battery 410, a positive electrode connecting piece 422, and a negative electrode connecting piece 421. The positive electrode connecting piece 422 and the negative electrode connecting piece 421 penetrate the second receiving space 120 and the first receiving space 120 to be electrically connected to the PCB board 300. It is understood that both the positive electrode connecting piece 422 and the negative electrode connecting piece 421 are L-shaped, and each includes a support portion and a clamping portion. The clamping portions of each connecting piece are arranged in the same height direction, forming a space between the clamping portions of each connecting piece for clamping and fixing the battery 410. The battery 410 is clamped and fixed in the second receiving space 120 by the positive electrode connecting piece 422 and the negative electrode connecting piece 421. Furthermore, the portion of the battery 410 that does not contact the clamping portion of the connecting piece is covered with an insulating sleeve.

[0037] By configuring the tire pressure monitoring system in this way, on the one hand, since two accommodating spaces 120 are respectively provided on the upper and lower sides of the air passage 110 in the housing 100, the first accommodating space 120 is used to place the PCB board 300 and the second accommodating space 120 is used to place the battery 410 assembly 400, the height or depth of each accommodating space 120 is relatively small, thereby making the volume distribution of the tire pressure monitoring system on the upper and lower sides of the air passage 110 more uniform. This avoids the inconvenience of installation caused by the larger volume on one side and can better adapt to the smaller inner wheel space of medium and large commercial vehicles. On the other hand, the transmitting antenna 320 is set on the PCB board 300. Compared with the setting of using the air valve as the transmitting antenna 320 in related technologies, its signal transmission is more stable, which is conducive to the stability and effectiveness of tire pressure monitoring.

[0038] In some embodiments, a sealing cover 130 is provided at the opening of the second receiving space 120, and the sealing cover 130 is connected to the housing 100 by threads or snap fasteners. In some preferred embodiments, the sealing cover 130 is connected to the edge of the opening of the second receiving space 120 by a snap fastener structure.

[0039] refer to Figures 1 to 5 In some embodiments, the aforementioned copper nozzle rod 200 is fixed in the air passage 110 of the housing 100 by injection molding. Specifically, during the injection molding process of the housing 100, the copper nozzle rod 200 is placed in the injection mold before the housing 100 is injection molded. This avoids gaps between the copper nozzle rod 200 and the air passage 110, thereby preventing air leakage and ensuring airtightness, thus improving the accuracy of tire pressure monitoring.

[0040] refer to Figure 3 and Figure 4 In some embodiments, slots 140 are provided in the housing 100 on both sides of the air passage 110, connecting two receiving spaces 120. The slots 140 are used for the positive electrode connecting piece 422 and the negative electrode connecting piece 421 to pass through and be electrically connected to the PCB board 300.

[0041] Specifically, refer to Figure 3 and Figure 4 Two baffles 150 protrude from the bottom of the second receiving space 120. A slot 140 is formed within the baffles 150 and extends through both the first and second receiving spaces 120. The width of the slot 140 tapers from large to small in the direction of insertion of the positive electrode connecting piece 422 and the negative electrode connecting piece 421. Specifically, a guide slope is provided at the entrance of the slot 140, and the width of the entrance of the slot 140 is greater than the width of the middle section and the exit of the slot 140. Since the support portion on the connecting piece is relatively long, the positive electrode connecting piece 422 and the negative electrode connecting piece 421 will inevitably bend towards each other. By configuring the slot 140 in this way, the positive electrode connecting piece 422 and the negative electrode connecting piece 421 can be opened by the guide slope when inserted into the slot 140, so that they can be smoothly inserted into the slot 140.

[0042] Meanwhile, guide ramps are provided on the positive electrode connecting piece 422 and the negative electrode connecting piece 421 near their free ends. More specifically, guide ramps are provided on both sides of the connecting piece in the width direction. In this way, the guide ramps on the connecting piece can guide it during insertion into the slot 140.

[0043] refer to Figures 2 to 5In some embodiments, the orthographic projection of the housing 100 in its height direction is circular, and correspondingly, the PCB board 300 is circular. A protrusion 160 is provided in the first receiving space 120, and a notch is provided on the PCB board 300 to avoid the protrusion 160. The mutual cooperation between the protrusion 160 and the notch can play a positioning role in the assembly process of the PCB board 300. Furthermore, a stud is provided in the first receiving space 120, and a threaded hole is provided on the PCB board 300. A screw passes through the threaded hole to be threadedly connected to the stud, thereby fixing the PCB board 300 in the first receiving space 120.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tire pressure monitor, characterized by, include: A housing having an air passage extending laterally through the housing, and receiving spaces formed on both the upper and lower sides of the air passage, with a through hole provided on one side of the air passage facing the receiving space, and each receiving space being sealed. A copper nozzle rod is inserted through the air passage. An air hole is provided on the circumferential surface of the copper nozzle rod, which is directly opposite to and connected to the through hole. An external thread is provided at one end of the copper nozzle rod and an internal thread is provided at the other end. A PCB board is disposed in the receiving space on one side connected to the through hole. A processor module, a pressure measuring chip and a transmitting antenna are disposed on the PCB board. The pressure measuring chip is disposed facing the through hole to detect the air pressure in the copper nozzle rod. A battery assembly includes a battery and positive and negative electrode connecting pieces. The battery is disposed in another receiving space, and the positive and negative electrode connecting pieces pass through both receiving spaces to be electrically connected to the PCB board.

2. The tire pressure monitor of claim 1 wherein: Each of the aforementioned accommodating spaces is filled with epoxy resin or polyurethane.

3. The tire pressure monitor of claim 1 or 2, wherein: A sealing cover is provided at the opening of the housing containing the battery, and the sealing cover is connected to the housing by threads or snaps.

4. The tire pressure monitor of claim 1 wherein: The housing is integrally formed by injection molding.

5. The tire pressure monitor of claim 4 wherein: The copper nozzle rod is fixed in the housing by injection molding.

6. The tire pressure monitoring device as described in claim 4 or 5, characterized in that: In the housing, slots connecting the two receiving spaces are respectively provided on both sides of the air passage. The slots are used for the positive and negative electrode connecting pieces to pass through and be electrically connected to the PCB board.

7. The tire pressure monitor of claim 6 wherein: Two enclosures are provided in the accommodating space on one side where the battery is located, and the slot is formed in the enclosures; the width of the slot is tapering from large to small in the direction of insertion of the positive and negative electrode connecting pieces, and each positive and negative electrode connecting piece is provided with a guide slope near its free end.

8. The tire pressure monitor of claim 1 wherein: The PCB board is circular; a protruding post is provided in the accommodating space where the PCB board is located, and a notch is provided on the PCB board to avoid the protruding post.

9. The tire pressure monitor of any one of claims 1, 2, 4, 5, 8, wherein: A gap space is formed between the PCB board and the bottom of the receiving space, and the transmitting antenna is disposed in the gap space.

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