CN101863201B - Tire pressure meter and air tap connecting structure - Google Patents

Abstract

The invention discloses a tire pressure meter and air tap connecting structure, which comprises: the universal head is arranged at the axial tail end of the air nozzle and is provided with a second fitting piece; the conductive cover sheet is fixed on the shell and comprises a body, a tongue piece and a guide groove, wherein the tongue piece extends into the shell from the body and is electrically connected with an emitting circuit in the circuit board, the guide groove penetrates through the body, and the body is provided with an inner concave spherical surface and an outer convex spherical surface; the universal head is in universal connection with the inner concave spherical surface and is concentrically arranged with the outer convex spherical surface; a first mating member including a limiting member; the insulating fixing piece is sleeved on the periphery of the air faucet so as to fix the air faucet and the wheel hub in an insulating way; the two matching pieces are matched and fixed through the guide groove; the signal of the tire pressure meter transmitting circuit is transmitted to the space through the conductive covering sheet, the first fitting piece, the second fitting piece, the universal head and the air nozzle in sequence. The invention can ensure the high-efficiency and reliable transmission of signals while ensuring the stable connection and flexible rotation of the tire pressure meter and the air tap, and can also ensure that the economic loss caused by the impact of the tire pressure meter is reduced to the minimum.

Description

Connection structure between tire pressure gauge and valve

【Technical field】

The invention relates to automobile security auxiliary equipment, in particular to a connection structure between a tire pressure gauge and an air nozzle.

【technical background】

It is common knowledge in the art that the tire pressure gauge of the automobile tire is connected with the air nozzle to form an independent product for sale. See the patent documents of various countries in the world including the applicant's patent (application) for the relevant technological evolution.

The connection structure between the tire pressure gauge and the air nozzle disclosed in the known patent documents not only considers the structure of transmitting the internal signal of the tire pressure gauge through the air nozzle and realizes the physical connection between the tire pressure gauge and the air nozzle, but also maintains the tire pressure. A structure in which the meter and the gas nozzle are not electrically connected but physically connected.

It is typically seen in the patent application CN200910260535.1 submitted by the applicant on December 10, 2009, which discloses a waterproof tire pressure detection device and a cylindrical coil protective cover. In the connection structure of the nozzle, the end of the air nozzle is designed as a spherical part, and the tire pressure gauge casing is formed with a groove for accommodating the spherical part, and the spherical part is tightly engaged with the groove and can rotate relatively. After the tire pressure gauge is installed, it is convenient to fine-tune the tilt angle of the tire pressure gauge relative to the air nozzle, so that the tire pressure gauge is close to the wheel groove and will not be easily damaged by prying tools. The disadvantage of this kind of structure is that the mechanical wear of the spherical part and the groove will easily lead to loosening of the tire pressure gauge over time.

Patent announcement CN201376472Y published on January 6, 2010 discloses a structural improvement of a tire pressure detector. Based on the same pivotal design principle, a screw hole is designed on the back of the groove of the tire pressure gauge to go through the groove. Through a The screw passes through the screw hole and locks with the preset screw hole of the universal head to realize the movable fixing of the tire pressure gauge and the valve. This improved structure can effectively prevent loosening due to mechanical wear, but it brings another problem. A similar problem. The main performance is that although the screw lock is realized between the screw and the screw hole of the universal head, the rotation fulcrum between the universal head of the air nozzle and the groove of the tire pressure gauge is not on the central axis of the air nozzle, but at the position where the groove is formed. It is also difficult to process it into a shape concentric with the universal head. In this way, when the tire pressure gauge tilts and swings relative to the air nozzle, it is equivalent to the process of eccentric rotation. During this period, the distance between the nut of the screw and the back wall of the groove is Therefore, in order to allow the tire pressure gauge to rotate flexibly relative to the air nozzle, the distance of the screw deep into the universal head of the air nozzle must be large enough, so that the distance can make the nut of the screw just meet the thickest part of the groove. The back wall coincides, and the rotation will not be restricted in this position because the back wall of the groove is too thick. However, excessive loosening of the screw will inevitably affect its fastening effect, and it will also make the gap between the bulb of the air nozzle and the groove of the tire pressure gauge loose, and the screw will easily reverse and come out, and the tire pressure gauge and the air nozzle will be easily separated. . Therefore, even if screws (bolts) are added, this connection structure is defective. In addition, in the universal structure of this technical solution, the limit of the rotation direction of the air nozzle is realized by the alignment of the positioning plane on the universal joint and the clamping plane on both sides of the guide groove. This structure does not take into account at all Other situations where bolts are matched with universal joints.

The above are all examples that only consider the physical structure between the tire pressure gauge and the air nozzle. In this case, the antenna inside the tire pressure gauge generally transmits electrical signals directly to the outside of the tire. As we all know, the tire is densely covered with steel mesh. The steel mesh and the hub form a shielding cavity, which greatly weakens the power intensity of the signal emitted from the tire. Some similar products on the market have further considered the electrical connection between the tire pressure gauge and the valve. It is more common to directly connect the transmitting circuit of the internal tire pressure gauge to the metal parts of the air nozzle, and use the air nozzle as the antenna for signal transmission. In this case, the signal inside the tire is led out of the tire and is no longer easily shielded. However, once water enters around the valve nozzle and the valve nozzle is integrated with the hub, the signal transmission cannot be sent normally due to a short circuit. And because the relatively large resistance of the gas nozzle affects the signal transmission power, the feed point of the signal to the gas nozzle, etc., it is difficult for this product to be fully recognized by consumers in the market at present.

Furthermore, back to the physical structure, the examples listed above, once the maintenance personnel accidentally damage the tire pressure gauge when stripping the tire, because the valve is a heavy metal part, the tire pressure gauge is generally a plastic or light metal part. The tire pressure gauge will be destroyed as a whole, but the valve can continue to be used. However, the cost of the tire pressure gauge is obviously much higher than that of the air nozzle. Therefore, on the basis of solving the above-mentioned defects, how to effectively reduce the economic loss when the man-made damage accident occurs should also be considered.

【Content of invention】

The object of the present invention is to provide a connection structure between a tire pressure gauge and an air nozzle with excellent electrical performance, stable structure and anti-collision damage reduction characteristics.

To achieve this goal, the present invention adopts following technical scheme:

The connection structure between the tire pressure gauge and the air nozzle of the present invention, the tire pressure gauge includes a circuit board equipped with a signal transmitting circuit and a casing that encapsulates the circuit board, and the connection structure includes:

The universal head is arranged at the axial end of the air nozzle, and a second fitting is arranged along the axial direction of the air nozzle;

The conductive covering sheet is fixed on the shell, including a body, a tongue extended from the body to the inside of the shell and electrically connected to the transmitting circuit in the circuit board, and a longitudinal guide groove running through the body. The body has an inner concave spherical surface and an outer convex spherical surface;

The universal head is universally connected with the concave spherical surface and kept concentric with the convex spherical surface;

The first matching part includes a limiting part that prevents itself from passing through the guide groove;

Insulation fixing parts are set on the periphery of the gas nozzle to insulate and fix the gas nozzle and the hub;

One of the two fittings fits and fixes with the other fitting through the guide groove;

The signals of the tire pressure gauge transmitting circuit are transmitted to the space successively through the conductive cover, the first matching part, the second matching part, the universal head and the air nozzle.

A pad slider is provided between the limiting piece and the conductive covering sheet, and the pad slider is provided with a through hole through which one of the matching pieces passes. The surface of the pad slider facing the conductive covering sheet is a concave smooth spherical surface. At least one of the facing surfaces of the pad slider and the limiting member is provided with a tooth-like structure that increases friction. Preferably, the surfaces of the pad slider and the limiting member facing each other are provided with mutually engaging tooth-like structures.

The air nozzle includes a cylindrical pipe body, the pipe body forms an air outlet through the side of the pipe wall at the end of the air intake, and a weak link with a thickness smaller than that of the rest of the pipe body is arranged around the pipe body. The weak link is arranged through the air outlet.

The conductive covering sheet, the first matching part and the second matching part are all conductive metal parts. A non-insulated multi-turn coil is connected in series between the conductive covering sheet and the transmitting circuit of the tire pressure gauge. The non-insulated multi-turn coil is a cylindrical coil.

The first matching part is a bolt, the nut of which is defined as the limiting part, and the second fitting part is a screw hole preset on the universal head. Alternatively, the first matching part is a nut, which is defined as the limiting part, and the second matching part is a screw preset on the universal head as a whole.

The connection structure also includes a buffer part integrally formed with the shell, and the buffer part is placed between the conductive covering sheet and the universal head. The buffer part has an inner concave spherical surface directly connected to the universal head instead of the conductive cover, an outer concave spherical surface that fits the inner concave spherical surface of the conductive cover, and a through hole corresponding to the guide groove of the conductive cover. slot.

The body of the conductive covering sheet is formed integrally with the tongue, and the tongue is a bent extension of the body. Both the conductive cover sheet and the gas nozzle are copper metal conductive parts.

In one embodiment of the present invention, the insulating fixing member is a sleeve-shaped rubber tube, and the rubber tube is provided with an annular groove on the side close to the universal head, which is in contact with the round hole of the hub. In another embodiment of the present invention, the insulating fixture includes a sealing rubber pad, a first rubber pad, a nut, a second rubber pad and a dustproof cap that are successively sleeved on the air nozzle, the first rubber pad and the The second rubber gasket is arranged on both ends of the nut respectively. An annular groove is formed between the sealing rubber gasket and the first rubber gasket for insulation and fixing with the round hole of the wheel hub. The nut is screwed with the air nozzle, and the dust cap is also connected with The air nozzle is screwed to seal the air inlet of the air nozzle.

Compared with prior art, the present invention has following advantage:

First of all, since the set conductive cover is kept concentric with the universal head, when the air nozzle drives the first fitting to tilt and swing, the stopper of the first fitting can be aligned with the conductive cover with the same width. Keep a distance between the faces of the main body, so that the connection between the first fitting and the second fitting is strengthened, so that the connection between the two is not easy to loosen, and further through the toothed structure of the pad slider, the other side is smooth The cooperation of the concave surface design enables the limiter to drive the pad slider to slide synchronously when being actuated, and the pad slider and the first fitting are clamped to each other, so that both the tire pressure gauge and the air nozzle The connection between them is more stable, and it also ensures that the relative rotation between the tire pressure gauge and the air nozzle can be flexible.

Secondly, the setting of the conductive cover not only achieves a stable connection, but also realizes the function of signal transmission because its tongue protrudes into the tire pressure gauge. In this way, the internal signal of the tire pressure gauge can pass through the conductive cover and the first fitting. , the second matching part, and finally transmit to the outside of the tire through the air nozzle. Since these parts, especially the conductive cover and the air nozzle, are made of copper metal material, the impedance is low and the electrical conductivity is good, so the signal transmission quality is high; and the air nozzle Insulation fixing parts are set on the periphery, which can effectively prevent the air nozzle from directly or indirectly contacting the wheel hub to form a short circuit; furthermore, since there are multiple turns of coils connected in series between the tongue and the tire pressure gauge transmitting circuit, it can simultaneously perform impedance matching and The double function of the antenna, so when the air nozzle works normally as a signal transmitting element, due to the impedance matching effect of the multi-turn coil, high wireless transmission stability and long signal transmission distance can be obtained.

Thirdly, the setting of the conductive covering sheet, while realizing a stable connection, also relatively weakens the strength of the gas nozzle tube body virtually. Combined with the technical means of setting a weak link on the tube body, the radial direction of the tube body at the weak link The thickness becomes thinner, thereby establishing the anti-collision and damage reduction mechanism in the connection structure. Specifically, because the mechanical strength of the weak link is weakened relative to other parts of the valve, when the tire pressure gauge installed on the wheel hub is impacted by an external force, due to the universal head It has been firmly connected with the tire pressure gauge shell with the first fitting, and the valve body and the wheel hub are also relatively firmly connected. The only weakness lies in the weak link, which is prone to breakage under the impact of external force. In this way, Although the tire pressure gauge will be separated from the air nozzle, it is the structure of the air nozzle that will be damaged, not the tire pressure gauge itself. Since the cost of the air nozzle is much lower than that of the tire pressure gauge, this will save users high maintenance costs , just replace the air nozzle and keep the tire pressure gauge.

In addition, although the above-mentioned effect of the present invention can be realized only between the conductive cover sheet and the universal head, the addition of the buffer part integrally formed with the shell can further strengthen the connection between the universal head and the shell. A guide groove has been set in the covering sheet to guide the movement track of the first fitting, and the slot hole of the buffer portion plays a relatively limited role. The slot hole only needs to provide enough movable space for the first fitting to move, thus, When designing the casing of the tire pressure gauge, it is not necessary to pay too much attention to the lateral width and shape of the buffer slot on the casing. On the other hand, since the casing is generally made of plastic, a buffer with a larger wall thickness can be processed at a lower cost. part, so that there is a larger operating space between the first fitting part and the second fitting part, without having to directly thicken the high-cost metal conductive cover, which obviously has the advantage of saving costs.

Although some main advantages of the present invention have been summarized as described above, the advantages of the present invention are not limited thereby, and any technical effect obtained directly or indirectly according to the technical means of the present invention should be included in the scope of the present invention. Substantial technical effect.

【Description of drawings】

Fig. 1 is the assembly schematic diagram of the connection structure between the tire pressure gauge and the air nozzle of the present invention;

Fig. 2 is a structural cross-sectional view of the connection structure between the tire pressure gauge and the air nozzle of the present invention;

Fig. 3 is a perspective view of another angle of view of the pad slider shown in part A of Fig. 1;

Figure 4 is an enlarged view of the weak link shown in part B in Figure 1;

5 is a schematic diagram of the circuit distribution of the circuit board of the tire pressure gauge of the present invention;

Fig. 6 is a schematic circuit diagram of the connection between the tire pressure gauge transmitting circuit of the present invention and components such as a conductive covering sheet and an air nozzle;

Fig. 7 is a structural schematic diagram of another modification of the connection structure between the tire pressure gauge and the air nozzle of the present invention, the air nozzle and the universal head;

Fig. 8 is a cross-sectional view of the connection structure between the tire pressure gauge and the air nozzle shown in Fig. 7 when the wheel hub is installed.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Fig. 1 and Fig. 2 jointly show the assembly relation of the tire pressure gauge of the present invention and the connection structure of the air nozzle, wherein the tire pressure gauge 1 is mainly composed of a casing 11 and a circuit board 12, and the circuit board 12 is integrated with tire pressure, temperature and The circuit 123 for detecting parameters such as humidity and/or humidity is also integrated with a transmitting circuit 121 (refer to FIG. 5 and FIG. 6 ) that sends the detection result in the form of a signal, and an integrated battery 122 as a power source. The circuits used by the tire pressure gauge 1 can be integrated on the same circuit board 12. On the circuit board 12 shown in FIG. 1, the integrated circuit has been omitted, but on the circuit board 12 shown in FIG. , then shows the specific circuit integration on a typical tire pressure gauge 1, because the specific circuit of the tire pressure gauge 1 does not affect the implementation of the present invention, so the specific circuit integration situation can not be repeated. 1 and 5, the circuit board 12 is provided with a longitudinal slot 120, the slot 120 will be used to insert the tongue 62 of the conductive cover 6 described later, and pass through the circuit board 12. A printed microstrip line (not shown) electrically connects the conductive cover 6 to the cylindrical coil on the circuit board 12 . The shell 11 and the circuit board 12 are directly installed by means of screw lock, that is, the shell 11 is made into a cover shape, the circuit board 12 is set to be as large as the cover surface of the shell 11, and then a plurality of screws 13 are passed through the circuit board The preset through hole on the tire pressure gauge 12 is screwed with the screw hole on the cover surface of the housing 11, so that the relative fixing between the housing 11 and the circuit board 12 of the tire pressure gauge 1 can be realized.

The air nozzle 2 made of copper conductive metal material disclosed by Fig. 1 and Fig. 2 is composed of a hollow pipe body 4, and the pipe body 4 has an air inlet 41 at the initial end of the air intake, a gas passage 42 and an outlet at the end of the air intake. Air port 40, air inlet 41 are arranged at one end of pipe body 4, and air outlet 40 is then arranged at the side wall of pipe body 4 other ends, thus it can be seen that the air intake process of air nozzle 2 is: through being from pipe body 4 The air inlet 41 at the exposed end enters the hollow passage 42, enters the air outlet 40 on the side wall of the tube body 4 along the axial direction of the air nozzle 2, and turns out into the tire.

A rubber tube 5 is sheathed around the periphery of the gas nozzle 2 as an insulating fixture to insulate and fix the gas nozzle 2 from the hub. Considering the setting of the air outlet 40 , the rubber tube 5 sleeved on the air nozzle 2 occupies the entire axial direction of the air nozzle 2 , but terminates at the air outlet 40 so as not to affect the flow of gas from the air outlet 40 . In order to make the rubber tube 5 not easy to break away from the hub, an annular groove 50 is also arranged at the joining position between the rubber tube 5 and the hub, and coincides with the metal edge of the circular hole of the hub with the annular groove 50 .

The air intake direction of the air nozzle 2 is basically equal to the axial direction of the air nozzle 2. At the axial end of the air nozzle 2, specifically the axial end on the same side as the air intake direction, the air outlet 40 is integrated with the air nozzle 2. Forming is provided with a universal head 3, and the universal head 3 is spherical in order to avoid the situation of eccentric connection when rotating. The axial direction of the universal head 3 therefore coincides completely with the axial direction of the gas nozzle 2 .

It can be seen that, with the air outlet 40 as the boundary, the air nozzle 2 is on one side, and the universal head 3 is on the other side.

4, in order to make the connection between the universal head 3 and the air nozzle 2 have a fragile system to realize the anti-collision reduction mechanism of the present invention, between the air nozzle 2 and the universal head 3, through the air outlet 40 A weak link 43 is provided. Specifically, the weak link 43 is realized by setting an annular groove 43 around the outer wall of the gas nozzle 2 so that the wall thickness of the pipe body 4 at the groove 43 becomes thinner. Because the weak link 43 is cut into a groove shape, the thickness of the pipe body 4 at the weak link 43 is smaller than the thickness of the rest of the pipe body 4, and the weak link 43 becomes fragile. After the valve 2 is inserted into the hub, The position corresponding to the annular groove 50 of the rubber tube 5 forms a fulcrum relationship with the wheel hub. Once the tire pressure gauge 1 is stressed, it will be directly transmitted to the universal head 3, and the weak link 43 is just in the middle. Breakage occurs at 43 places, so that the air nozzle 2 is destroyed and the tire pressure gauge 1 is preserved as a whole. The maintenance personnel only need to replace the air nozzle 2 with the universal head 3 for the user, and the original tire pressure gauge 1 can be restored on the same wheel hub. Compared with the replacement of the tire pressure gauge 1, the cost of replacing the air nozzle 2 is obviously lower. Low.

In order to make the weak link 43 play a role, it is required that the connection between the universal head 3 and the tire pressure gauge 1 should be relatively stable. Referring to Figures 1 and 2, in the axial direction of the universal head 3, that is, where the axis of the air nozzle 2 coincides, there is a screw hole 30 that goes deep into the inside of the universal head 3, and the screw hole 30 will be used as the screw hole of this embodiment. The second fitting cooperates with the soon-to-be-disclosed first fitting, so that the universal head 3 and the tire pressure gauge 1 are firmly connected.

1 and 2, in order to realize the connection between the universal head 3 and the tire pressure gauge 1, on the casing 11 of the tire pressure gauge 1, a buffer part 7 is integrally formed with the casing 11, and the buffer part 7 is in the shape of a spherical arch Shape, which forms an inner concave spherical surface 74 and an outer convex spherical surface 73, the inner concave spherical surface 74 just coincides with the spherical surface of the universal head 3, so that the universal head 3 realizes universal connection in the inner concave spherical surface 74. In order to make the second matching part on the universal head 3 cooperate with the first fitting part described later through the buffer part 7, a through slot 70 is also provided on the buffer part 7, and the slot 70 needs to have a sufficient length Dimensions, so as to match with the longitudinal dimension of the guide groove 60 of the conductive covering sheet 6 described later, for the first fitting part described later to move back and forth flexibly in the slot hole 70 as the universal head 3 tilts and swings. However, there is no requirement regarding the lateral width and specific shape of the slot 70 .

1 and 2, on the convex spherical surface of the buffer portion 7, a conductive cover 6 is covered, the conductive cover 6 is made of copper conductive metal material, and the conductive cover 6 has a body 61 , the main body 61 is generally arched, has a concave spherical surface 64 closely attached to the convex spherical surface 73 of the buffer portion 7, and a convex spherical surface 63 facing away from the concave spherical surface 64, and the convex spherical surface 63 It is designed to remain completely concentric with the universal head 3 (the spherical surface), so that when the body 61 of the conductive cover 6 covers the buffer portion 7 and tightly covers the outer convex spherical surface 73 of the buffer portion 7, the conductive cover 6 The distance from the convex spherical surface 63 of the body 61 of the 6 to the center of the sphere of the universal head 3 is equal everywhere.

The conductive cover 6 also has a tongue 62, which extends from the bottom of the body 61 and bends out. The tongue 62 becomes the bent extension of the body 61. The tongue 62 passes through the casing 11 of the tire pressure gauge 1. The preset through-slot (unlabeled) enters the inside of the housing 11, is inserted into the slot 120 of the circuit board 12, and is welded, so as to realize the fixation with the circuit board 12 physically and further electrically The electrical connection between the tongue piece 62 and the cylindrical coil on the circuit board 12 is realized. The relative bending between the tongue piece 62 and the body 61 is adaptively designed due to the restriction of the specific shape of the tire pressure gauge 1 , therefore, its deficiency constitutes a limitation of the present invention. In other words, the tongue piece 62 can directly extend from the bottom of the body 61 without any bending.

On the body 61 of the conductive covering sheet 6, a longitudinal guide groove 60 is provided, and the longitudinal direction of the guide groove 60 is perpendicular to the plane formed by the circuit board 12. Adjusting the tilt angle between the tire pressure gauge 1 and the air nozzle 2 is equivalent to adjusting the tilt relationship between the plane formed by the circuit board 12 and the axis of the air nozzle 2 . The guide groove 60 is defined as being elongated in order to limit the range and range of movement of the first fitting described later, and the lateral width of the guide groove 60 is also limited so that the first fitting passes through the guide groove 60. The width just coincides with the lateral width of the guide groove 60.

The conductive covering sheet 6 can be fixed by inserting its side into a preset groove (not shown) on the housing 11. For further reinforcement, it is also conceivable to place the conductive covering sheet 6 and the buffer part 7 with Screws (not shown) are locked.

The first fitting is embodied as a bolt 8 in this embodiment, and the bolt 8 has a special design of the present invention, which includes a stud 82 and a nut 81, and a toothed structure is provided on the bottom surface of the nut 81 (not shown). There is a certain corresponding relationship between the stud 82, the guide groove 60 of the aforementioned conductive covering sheet 6, the slot hole 70 of the buffer portion 7, and the screw hole 30 of the universal head 3. Specifically, the guide groove 60 and the slot hole 70 should at least allow the stud 82 to pass through, and the screw hole 30 of the universal head 3 is used as a second fitting, and its size is just enough to allow the stud 82 to be screwed therewith. The nut 81 of the bolt 8 constitutes a stopper in this embodiment, and its minimum width is greater than the lateral width of the guide groove 60 of the conductive cover 6, so that when the stud 82 of the bolt 8 passes through the guide groove 60 of the conductive cover 6 When the slot hole 70 of the buffer part 7 reaches the screw hole 30 of the universal head 3, the nut 81 will collide with the body 61 of the conductive covering sheet 6, and it will play a position-limiting role, and the nut 81 will prevent the bolt 8 from passing through the hole completely. Guide groove 60. Note that in Fig. 2, when the stud 82 is screwed with the universal head 3, it can form a sealing effect. Therefore, even if the hollow structure of the air nozzle 2 directly penetrates the universal head 3, it is also feasible, because the stud 82 can The gas nozzle 2 is sealed in the axial direction.

It can be seen that after the universal connection is realized by assembling the universal head 3 with the concave spherical surface 74 of the buffer part 7, the second matching part on the universal head 3 and the guide groove 60 passing through the conductive covering sheet 6 and the groove of the buffer part 7 The first matching parts of the hole 70 are assembled together, so that the connection between the universal head 3 and the casing 11 of the tire pressure gauge 1 is more stable. Since the distance between the convex spherical surface 63 of the conductive covering 6 and the center of the ball of the universal head 3 is equal everywhere, during the rotation of the universal head 3, the convex spherical surface 63 of the conductive covering 6 and the spherical surface of the universal head 3 realize Completely set concentrically, thus, the distance from the nut 81 used as a stopper in the first matching part to the convex spherical surface 63 of the conductive covering sheet 6 will also remain unchanged, so that the nut 81 is not easy to receive unnecessary resistance And act on the bolt 8 as a whole, so that the bolt 8 becomes loose so that the tire pressure gauge 1 and the air nozzle 2 appear or loosen or come off.

Further, in conjunction with Fig. 1, Fig. 2 and Fig. 3, in order to prevent mechanical wear caused by friction between the bottom surface of the nut 81 as the stopper and the convex spherical surface 63 of the conductive cover sheet 6, between the stopper and the conductive cover sheet 6 is provided with a pad slider 9, the pad slider 9 is roughly in the shape of a cube, and a through hole 90 for the stud 82 of the bolt 8 to pass through is provided on it, and the bolt 8 passes through the pad slider before passing through the guide groove 60 9 through hole 90, then the movement of bolt 8 must drive the synchronous movement of pad slider 9. The side 93 of the pad slider 9 facing the nut 81 is provided with a toothed structure 99 that engages with the toothed structure of the nut 82, and the surface 94 of the pad slider 9 facing the convex spherical surface 63 of the conductive cover 6 is processed into an inner surface. Concave and smooth spherical surface, like this, when the pad slider 9 is placed between the bolt 8 and the conductive cover 6, one side 93 is engaged with the limiter and clamped, and the other side 94 maintains a slidable relationship with the conductive cover 6, Thus, the pad slider 9 can be synchronously driven by the first matching part. And once the bolt 8 as the first fitting is locked with the screw hole 30 on the universal head 3 as the second fitting, because the bottom surface of its nut 81 is engaged and clamped with the pad slider 9, even if the bolt 8 Under the action of a general force, the bolt 8 is not easy to break free from the meshing relationship between the nut 81 and the pad slider 9 and loosen, that is to say, the gap between the bolt 8 and the screw hole 30 of the universal head 3 Maintain an extremely strong connection.

In order to further ensure the signal transmission of the tire pressure gauge 1, except that the conductive cover 6, the universal head 3, and the air nozzle 2 are all made of copper conductive metal, the first fitting, the second fitting and the pad slider 9 are also suitable. The use of conductive metal parts, especially the use of conductive metal parts for the first matching part is necessary, and the second fitting part refers to the screw hole 30 directly formed on the universal head 3 in this embodiment, so its material does not need to be limited otherwise . Thereby, after the connection structure of the present invention is installed on the wheel hub, the transmitting circuit 121 on the circuit board 12 of the tire pressure gauge 1 can transmit the signal successively through the conductive covering sheet 6, the first fitting, the second fitting, and the universal head 3. , Air nozzle 2 launches to the space outside the wheel hub. Since the air nozzle 2 and the hub have been insulated by the rubber tube 5, the signal of the tire pressure gauge 1 can be transmitted well, and there is no need to worry about the short circuit between the transmitting circuit 121 and the hub under normal circumstances.

As shown in Fig. 5 and Fig. 6, preferably a cylindrical coil 128 is connected in series as a non-insulated multi-turn coil between the transmitting circuit 121 and the tongue 62 of the conductive covering sheet 6, where the non-insulated multi-turn coil serves both The function of impedance matching enhances the transmission stability of the air nozzle 2 as a signal transmitting element, increases the signal transmission distance, and can also act as a subordinate antenna. In Fig. 5, the connection relationship between the cylindrical coil 128, the transmitting circuit 121 and the conductive tongue 62 is realized by the microstrip line printed on the circuit board 12 according to the connection principle shown in Fig. 6 , but the microstrip line is not shown in the figure. Those skilled in the art are well aware of this technical requirement, so it is only described here.

The above discloses a typical embodiment of the present invention. It can be known from the above description that after the tire pressure gauge 1 and the air nozzle 2 connection structure of the present invention are applied on automobile tires, relatively excellent electrical characteristics and structural stability can be obtained. .

Based on the spirit of the present invention, in other embodiments, appropriate modifications can be made to the invention, for example:

In the embodiment jointly disclosed in Fig. 7 and Fig. 8, the air nozzle 2 is integrally formed with the air nozzle near its air outlet 40 and provided with a rear seat boss 28, and the insulating fixing parts include successively sleeved on the air nozzle 2 The sealing rubber pad 51 , the first rubber pad 52 , the nut 53 , the second rubber pad 54 and the dustproof cap 55 on the pipe body 4 . The nut 53 is preferably a hexagonal nut. The sealing rubber pad 51 is in conflict with the rear seat boss 28, and the first rubber pad 52 and the second rubber pad 54 are arranged between the nut 53 and the valve body 4 at both ends of the nut 53 respectively. The rubber pad 52 has a certain radial thickness, and the sealing rubber pad 51 has a narrowed boss 510 that is relatively self-depressed (shown as having a smaller radial dimension), so there is a gap between the sealing rubber pad 51 and the first rubber pad 52. Just form an annular groove 50 which is insulated and fixed with the round hole of the hub W1, the nut 53 is screw-locked with the preset thread 4001 on the valve body 4, and the dust cap 55 is also connected with the gas nozzle body 4 air inlet The preset thread 4002 on the outer wall is screw-locked to seal the air inlet of the air nozzle 2 . Installing the structure of the insulating fixture disclosed in FIG. 7 with the hub W1 as shown in FIG. 8 can achieve exactly the same technical effect as the previous embodiment.

In an embodiment not shown in the figure, the buffer portion 7 is omitted, and the conductive covering sheet 6 fixed on the casing 11 of the tire pressure gauge 1 plays a corresponding role. Specifically, the universal head 3 is directly universally connected to the concave spherical surface 63 of the conductive cover 6, and the bolt 8 is directly connected to the universal head after passing through the through hole 90 of the pad slider 9 and the guide groove 60 of the conductive cover 6. 3's screw holes 30 are matched and locked. In this example, it is necessary to increase the thickness of the conductive covering sheet 6 and strengthen the firm connection between it and the casing 11 .

In another non-illustrated embodiment, the first matching part and the second matching part are designed in a more flexible manner. Specifically, a nut (not shown) is used as the first fitting, and the nut itself acts as a limiter at the same time, and a stud (not shown) fixed on the universal head 3 is used as the second fitting. , through the screw-locking relationship between the nut and the stud, it can also achieve the same technical effect as the foregoing exemplary embodiment.

Alternatively, the first fitting and the second fitting can be screwed into an engaging relationship, and the present invention can also be realized in the same way.

In summary, each embodiment derived on the basis of the present invention can realize the adjustment of the tilting angle of the tire pressure gauge relative to the air nozzle, and can ensure the stable connection between the tire pressure gauge and the air nozzle, flexible While rotating, it ensures efficient and reliable signal transmission, and further ensures that the economic loss caused by the impact of the tire pressure gauge is minimized.

The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention; therefore, although the specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand , the present invention can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (14)

1. a tire gauge and air faucet connecting structure, tire gauge comprise the circuit card that is equiped with signal transmission circuit and the shell of this circuit card of encapsulation, it is characterized in that, this connection structure comprises:

Universal-head is arranged on the valve axial end, is axially arranged with the second related parts along valve;

Conduction is covered sheet, is fixed on the described shell, comprise body, in body extends to shell with circuit card in the tongue piece that is electrically connected of transmission circuit, and the guide groove that connects the lengthwise of body, body has interior concave spherical surface and evagination sphere;

Universal-head keeps concentric setting with being somebody's turn to do interior universal connection of concave spherical surface with between this evagination sphere;

The first related parts comprises stoping the locating part that self passes through this guide groove;

Insulating fixing piece is set in the valve periphery so that valve and wheel hub insulation are fixing;

One of two relateds parts match fixing through this guide groove with another related parts;

The signal of tire gauge transmission circuit covers sheet, the first related parts, the second related parts, Universal-head, valve to spatial emission through this conduction in succession;

Described locating part and conduction are covered and are provided with the pad slide block between the sheet, the pad slide block is provided with the through hole that passes through for one of related parts, the face that described pad slide block covers sheet towards conduction is the spill smooth sphere, and described pad slide block and described locating part face toward each other are provided with one of at least the dentalation of increasing friction force;

Described valve comprises the tubular body, and body from the air extractor duct that the tube wall side passes, is provided with thickness less than the weak link of body all the other position thickness around this body in the formation one of air inlet end.

2. tire gauge according to claim 1 and air faucet connecting structure, it is characterized in that: described pad slide block and described locating part face toward each other are equipped with intermeshing dentalation.

3. tire gauge according to claim 1 and air faucet connecting structure is characterized in that: the described air extractor duct setting of described weak link process.

4. tire gauge according to claim 1 and 2 and air faucet connecting structure, it is characterized in that: described conduction is covered sheet, the first related parts and the second related parts and is conducting metal spare.

5. tire gauge according to claim 1 and 2 and air faucet connecting structure is characterized in that: described conduction is covered between the transmission circuit of sheet and described tire gauge and is serially connected with nonisulated multiturn coil.

6. tire gauge according to claim 5 and air faucet connecting structure, it is characterized in that: described nonisulated multiturn coil is cylindrical solenoid.

7. tire gauge according to claim 1 and 2 and air faucet connecting structure, it is characterized in that: described the first related parts is bolt, and its nut is defined as described locating part, described the second related parts is the screw that is preset on the Universal-head.

8. tire gauge according to claim 1 and 2 and air faucet connecting structure, it is characterized in that: described the first related parts is nut, is defined as described locating part, described the second related parts is integrated the screw that is preset on the Universal-head.

9. tire gauge according to claim 1 and 2 and air faucet connecting structure is characterized in that: it is one-body molded that described conduction is covered body and the tongue piece of sheet, and tongue piece is the bending extension of body.

10. tire gauge according to claim 1 and 2 and air faucet connecting structure is characterized in that: this connection structure also comprises and the integrated buffer part of shell, and this buffer part places conduction to cover between sheet and the Universal-head.

11. tire gauge according to claim 10 and air faucet connecting structure, it is characterized in that: this buffer part have the conduction of substituting cover sheet directly with the universal interior concave spherical surface that is connected of Universal-head, with cover the outer concave spherical surface that the interior concave spherical surface of sheet fits with conduction, and cover the slotted eye of the corresponding perforation of the guide groove of sheet with conduction.

12. tire gauge according to claim 1 and 2 and air faucet connecting structure is characterized in that: described conduction covers sheet and valve is copper conducting metal spare.

13. tire gauge according to claim 1 and 2 and air faucet connecting structure is characterized in that: described insulating fixing piece is one to be the India rubber tube of sleeve-shaped, and this India rubber tube is provided with the fixing annular groove that contacts with the circular hole of wheel hub in the side near Universal-head.

14. tire gauge according to claim 1 and 2 and air faucet connecting structure, it is characterized in that: described insulating fixing piece comprises seal gasket, the first rubber cushion, nut, the second rubber cushion and the dust cap that in succession is set on the valve, the first rubber cushion and the second rubber cushion are established respectively at nut two ends pad, form one between seal gasket and the first rubber cushion for the fixing annular groove that insulate mutually of the circular hole with wheel hub, nut and valve phase screw lock, dust cap also with valve phase screw lock with the encapsulation valve admission port.

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