CN218975319U

CN218975319U - Voltage conversion type air filter blocking alarm switch with tact switch

Info

Publication number: CN218975319U
Application number: CN202223604431.8U
Authority: CN
Inventors: 池辉; 刘海燕; 林少波; 刘俊远; 邵子健
Original assignee: Chint Automotive Technology Co
Current assignee: Chint Automotive Technology Co
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-05
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to a voltage conversion type air filter blockage alarm switch with a tact switch, which comprises a base and a plug assembly, wherein the plug assembly comprises a plug sleeve and a plurality of plug posts, the plug sleeve is connected with the base to form a mounting cavity, a diaphragm is arranged in the mounting cavity, the diaphragm divides the mounting cavity into a first accommodating cavity and a second accommodating cavity, an air vent communicated with the second accommodating cavity is arranged on the base, the tact switch capable of being contacted with or separated from the diaphragm and a circuit board for outputting relative voltage signals according to the contact state of the tact switch and the diaphragm are arranged in the first accommodating cavity, the tact switch is connected with the circuit board, and a spring piece is arranged in the second accommodating cavity. By adopting the technical scheme, the utility model provides the voltage conversion type air filter blockage alarm switch with the tact switch, which not only can output a switching value signal, but also can output 1V and 3.3V voltages to an automobile controller, and solves the problem of high cost of an electronic pressure switch.

Description

Voltage conversion type air filter blocking alarm switch with tact switch

Technical Field

The utility model relates to an alarm switch, in particular to a voltage conversion type air filter blocking alarm switch with a touch switch.

Background

The air filter of the engine is equivalent to the nose of a person, is a first pass 'checkpoint' through which air enters the engine, and is used for filtering wind sand and some suspended particles in the air, so that the air entering the engine is purer, and the engine can work normally only when the engine is used for air filtering in agricultural machinery.

However, the existing agricultural machinery has the defects that the working environment is poor, the air in the working area contains more dust and fine sand grains, the air filter is easy to block, the engine is difficult to start, weak, unstable in idling and other symptoms, serious engine cylinder pulling and other serious consequences are caused, the efficient and stable operation of the engine is inconvenient, and therefore the engine air filter blocking alarm appears in the existing market.

The prior Chinese patent with the publication number of CN213574408U discloses an engine air filter blockage alarm, which comprises an aluminum shell, a lower spring, a moving ejector rod and a conductive electrode, wherein the middle part of the upper end of the aluminum shell is provided with the lower spring, the upper end of the lower spring is provided with the moving ejector rod, two sides of the upper end of the moving ejector rod are provided with silica gel diaphragms, the conductive electrode is arranged above the moving ejector rod, the middle part of the upper end of the conductive electrode is provided with an upper spring, and the top end of the upper spring is provided with a plastic plug-in.

The alarm drives the ejector rod to press downwards through the change of air pressure, the lower spring is compressed, the upper spring is stretched, and the conductive electrode is connected when the ejector rod is pressed downwards to a certain extent, so that an alarm signal is sent. However, the alarm can only simply output the switching value of on/off, cannot output voltage values of 1V and 3.3V to the automobile controller, has a complex structure and has high input cost.

Disclosure of Invention

The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides the voltage conversion type air filter blockage alarm switch with the tact switch, which can output not only a switching value signal but also 1V and 3.3V voltage to an automobile controller compared with the traditional air filter blockage alarm switch, and solves the problems that an electronic pressure switch is high in cost and incompatible with the replacement of a common switch.

The technical scheme of the utility model is as follows: the utility model provides a take empty jam alarm switch that strains of voltage conversion formula of dabbing switch, includes base and plug subassembly, plug subassembly includes plug cover and a plurality of plug post, the plug cover is connected with the base and is formed the installation cavity, be equipped with the diaphragm in the installation cavity, the diaphragm is divided into first appearance chamber and second appearance chamber with the installation cavity, be equipped with on the base with the communicating air vent of second appearance chamber, first appearance intracavity is equipped with the dabbing switch that can contact or separate with the diaphragm and is used for according to the circuit board of dabbing switch and diaphragm contact state output relative voltage signal, each plug post all extends to first appearance intracavity and is connected with the circuit board, dabbing switch and circuit board connection, the second appearance intracavity is equipped with the shell fragment, the shell fragment produce deformation under the drive of diaphragm and realize the displacement.

By adopting the technical scheme, when the air filter normally works, the tact switch is contacted with the diaphragm, the tact switch is in an off state, the circuit board outputs 1V voltage outwards, when the air filter is blocked, the bottom of the alarm switch generates negative pressure, the diaphragm is gradually stressed to be contacted with the elastic sheet along with the gradual increase of the negative pressure, the downward force value is also gradually increased along with the increase of the negative pressure, when the negative pressure value reaches a certain value, the elastic sheet is deformed downwards and displaced, at the moment, the tact switch is separated from the diaphragm, the tact switch outputs a closing signal to the circuit board, the circuit board outputs 3.3V voltage according to the closing signal, the alarm function is realized, not only the switching value signal can be output, but also the 1V voltage and the 3.3V voltage can be output according to the existence of the output, whether the blocking occurs is judged according to the output voltage value, and the problems that the electronic pressure switch is high in cost and is incompatible with the common switch replacement are solved.

The utility model is further provided with: and a pressing piece is further arranged in the second containing cavity, and a pressing piece which is contacted with the elastic sheet when the diaphragm moves is arranged on the pressing piece in an extending mode.

By adopting the further arrangement, the elastic sheet is better driven to deform when the diaphragm moves.

Still further, the present utility model provides: the base is provided with a concave cavity and an annular groove positioned at the periphery of the concave cavity, the periphery of the diaphragm is inserted into the annular groove, a second containing cavity is formed between the diaphragm and the concave cavity, the plug bush is arranged in a hollow mode, the lower end face of the plug bush is arranged on the periphery of the diaphragm in a collision mode, and a first containing cavity is formed between the inner side wall of the plug bush and the diaphragm.

By adopting the further arrangement, the structure is simple, the installation is convenient, the whole structure is compact, and the structure of the membrane is more stable.

Still further, the present utility model is provided with: the spring plate is characterized in that extension sheets and pins arranged on the extension sheets are obliquely arranged on two sides of the spring plate, mounting seats are arranged on two sides of the base, inserting slots for inserting the pins are formed in the mounting seats, and the extension sheets are arranged on the mounting seats in a propping mode.

By adopting the above arrangement, the structure of the elastic sheet is stable, and the deformation of the elastic sheet is better realized.

Still further, the present utility model is provided with: the lower end face of the diaphragm is provided with a mounting groove along the circumferential direction of the diaphragm, the pressing piece is provided with an annular boss, and the annular boss is clamped in the mounting groove to realize synchronous movement of the pressing piece and the diaphragm.

By adopting the above arrangement, the structure is simple, the installation is convenient, and the diaphragm can drive the elastic sheet to deform under the negative pressure state.

Still further, the present utility model is provided with: the outer side wall of the base is provided with a clamping hook along the circumferential direction, the plug bush is correspondingly provided with a clamping table, and the clamping hook is arranged on the clamping table to realize the connection of the plug bush and the base.

By adopting the further arrangement, the plug is simple in structure, convenient to install and firm in structure between the base and the plug bush.

Still further, the present utility model is provided with: the bottom of the annular groove is provided with a first sealing ring, and a second sealing ring is arranged between the diaphragm and the lower end of the plug bush.

Adopt above-mentioned still further setting for this alarm switch is sealed effectual, prevents that gas from leaking through the gap between plug bush and the inside wall of recess, avoids causing the negative pressure value insufficient, can't drive the displacement of diaphragm and shell fragment, leads to the condition emergence that alarm switch can't report to the police.

Still further, the present utility model is provided with: and a sealing ring is arranged on the peripheral wall of the base.

By adopting the further arrangement, the base and other components have good sealing effect during installation.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is an exploded view of an embodiment of the present utility model;

FIG. 5 is a schematic view illustrating the mounting of a base and a diaphragm according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a base of an embodiment of the utility model;

FIG. 7 is a schematic view of a spring plate according to an embodiment of the present utility model;

FIG. 8 is an enlarged view of portion A of FIG. 3;

fig. 9 is an enlarged view of a portion B in fig. 3.

1, a base; 11, a vent; 12, a concave cavity; 13, an annular groove; 131, a sealing ring; 14, a mounting seat; 141, a slot; 15, clamping hooks; 16, sealing ring; 2, a plug assembly; 21, plug sleeve; 211, clamping table; 22, plug posts; 3, installing a cavity; 31, a first cavity; 32, a second cavity; 4, a membrane; 42, mounting grooves; 5, a circuit board; 6, touching the switch; 7, a spring plate; 71, extending the sheet; 72, pins; 8, pressing the piece; 81, pressing blocks; 82, annular boss.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications (such as up, down, front, and rear … …) in the description of the present utility model are merely for explaining the relative positional relationship, movement, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. In the description of the present utility model, "a number" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the scope of protection claimed by the present utility model.

As shown in fig. 1-9, the voltage conversion type air filtration blocking alarm switch with the tact switch comprises a base 1 and a plug assembly 2, wherein the plug assembly 2 comprises a plug sleeve 21 and a plurality of plug posts 22, the plug posts 22 are provided with four, the plug sleeve is internally provided with a hollow part, a concave cavity is arranged on the base, the plug sleeve 21 is connected with the base 1, the hollow part is matched with the concave cavity to form an installation cavity 3, a clamping hook 15 is arranged on the outer side wall of the base 1 along the circumferential direction of the outer side wall, a clamping table 211 is correspondingly arranged on the plug sleeve 21, the clamping hook 15 is hooked on the clamping table 211 to realize the connection of the plug sleeve 21 and the base 1, the structure is simple, the installation is convenient, the structure is firm between the base 1 and the plug sleeve 21, the outer circumferential wall of the base 1 is provided with a sealing ring 16, the sealing effect is good when the base 1 and other parts are installed, the installation cavity 3 is internally provided with a membrane 4, the membrane 4 divides the mounting cavity 3 into a first cavity 31 and a second cavity 32, the base 1 is provided with a vent 11 communicated with the second cavity 32, the first cavity 31 is internally provided with a tact switch 6 which can be contacted with or separated from the membrane 4 and a circuit board 5 which is used for outputting opposite voltage signals according to the contact state of the tact switch 6 and the membrane 4, each plug column 22 extends into the first cavity 31 to be connected with the circuit board 5, the tact switch 6 is connected with the circuit board 5, the second cavity 32 is internally provided with a spring piece 7, the spring piece 7 is deformed under the drive of the membrane 4 so as to realize displacement, when the air filter works normally, the tact switch 6 is contacted with the membrane 4, the tact switch 6 is in a disconnection state, the circuit board 5 outputs 1V voltage outwards, when the air filter is blocked, the bottom of the alarm switch generates negative pressure, along with the gradual stress of the air pressure falling diaphragm 4 and the contact of the elastic sheet 7, and along with the gradual increase of the negative pressure, the downward force value of the negative pressure is also gradually increased, when the negative pressure value reaches a certain value, the elastic sheet 7 is deformed downwards and displaced, at the moment, the tact switch 6 is separated from the diaphragm 4, the tact switch 6 outputs a closing signal to the circuit board 5, the circuit board 5 outputs 3.3V voltage according to the closing signal, the alarm function is realized, not only can output a switching value signal, but also can output 1V and 3.3V voltage to the automobile controller according to the signal contacted between the diaphragm and the tact switch, and the problems that the electronic pressure switch is high in cost and incompatible with the replacement of a common switch are solved.

The second cavity 32 is further provided with a pressing piece 8, the pressing piece 8 is provided with a pressing piece 81 extending to contact with the elastic piece 7 when the diaphragm 4 moves, and the elastic piece is driven to deform better when the diaphragm 4 moves. The lower end face of the diaphragm 4 is provided with a mounting groove 42 along the circumferential direction of the diaphragm, the pressing piece 8 is provided with an annular boss 82, the annular boss 82 is clamped in the mounting groove 42 to realize synchronous movement of the pressing piece 8 and the diaphragm 4, the structure is simple, the mounting is convenient, and the diaphragm is convenient to drive the elastic sheet to deform under the negative pressure state.

The both sides of shell fragment 7 all slope be equipped with extension piece 71 and set up the pin 72 on extension piece 71, the both sides of base 1 all are equipped with mount pad 14, mount pad 14 on be equipped with and supply to participate in 72 male slot 141, extension piece 71 contradict and set up on mount pad 14 for the stable in structure of shell fragment, the better deformation that realizes the shell fragment.

Be equipped with cavity 12 and be located cavity 12 periphery's annular groove 13 on the base 1, the peripheral of diaphragm 4 inserts and establishes in annular groove 13, form between diaphragm 4 and the cavity 12 second appearance chamber 32, plug bush 21 cavity sets up, the lower terminal surface conflict of plug bush 21 sets up on the peripheral 41 of diaphragm 4, forms between the inside wall of plug bush 21 and the diaphragm 4 first appearance chamber 31, simple structure, simple to operate to make overall structure comparatively compact, the structure of diaphragm is more stable. The annular groove 13 bottom be equipped with first sealing washer 131, be equipped with the second sealing washer between diaphragm 4 and the plug bush 21 lower extreme for this alarm switch sealed effectual prevents that gas from leaking through the gap between the inside wall of plug bush 21 and recess 13, avoids causing the negative pressure value insufficient, can't drive the displacement of diaphragm and shell fragment, leads to the condition emergence that alarm switch can't report to the police.

Claims

1. The utility model provides a take empty jam alarm switch that strains of voltage conversion formula of dabbing switch, includes base and plug assembly, plug assembly includes plug cover and a plurality of plug post, the plug cover is connected with the base and is formed the installation cavity, be equipped with the diaphragm in the installation cavity, its characterized in that, the diaphragm is divided into first appearance chamber and second appearance chamber with the installation cavity, be equipped with on the base with the communicating air vent of second appearance chamber, first appearance intracavity is equipped with the dabbing switch that can contact or separate with the diaphragm and is used for according to dabbing the circuit board of the relative voltage signal of switch and diaphragm contact state output, dabbing switch and circuit board connection.

2. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 1, wherein an elastic sheet is arranged in the second containing cavity, and the elastic sheet deforms and displaces under the driving of the diaphragm.

3. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 2, wherein a pressing piece is further arranged in the second containing cavity, and the pressing piece is extended and provided with a pressing piece which is contacted with the elastic piece when the diaphragm moves.

4. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 1, 2 or 3, wherein the base is provided with a concave cavity and an annular groove positioned at the periphery of the concave cavity, the periphery of the diaphragm is inserted into the annular groove, and the second accommodating cavity is formed between the diaphragm and the concave cavity.

5. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 4, wherein the plug sleeve is arranged in a hollow mode, the lower end face of the plug sleeve is arranged on the periphery of the diaphragm in a collision mode, and the first accommodating cavity is formed between the inner side wall of the plug sleeve and the diaphragm.

6. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 2 or 3, wherein extension sheets and pins arranged on the extension sheets are obliquely arranged on two sides of the elastic sheet, mounting seats are arranged on two sides of the base, slots for inserting the pins are arranged on the mounting seats, and the extension sheets are arranged on the mounting seats in a propping mode.

7. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 3, wherein the lower end face of the diaphragm is provided with a mounting groove along the circumferential direction of the lower end face of the diaphragm, the pressing piece is provided with an annular boss, and the annular boss is clamped in the mounting groove to realize synchronous movement of the pressing piece and the diaphragm.

8. The voltage conversion type air filter blockage alarm switch with the tact switch according to claim 5, wherein the outer side wall of the base is provided with a clamping hook along the circumferential direction of the outer side wall, the plug sleeve is correspondingly provided with a clamping table, and the clamping hook is arranged on the clamping table to realize the connection between the plug sleeve and the base.

9. The pressure conversion type air filter blockage alarm switch with the tact switch according to claim 4, wherein a first sealing ring is arranged at the bottom of the annular groove, and a second sealing ring is arranged between the diaphragm and the lower end of the plug bush.

10. A voltage conversion type air filter blockage alarm switch with a tact switch according to claim 1, 2 or 3, wherein a sealing ring is arranged on the peripheral wall of the base.