Permanent magnet control electromagnetic valve

Abstract

The utility model discloses a permanent magnet control electromagnetic valve which comprises a shell, a valve seat, a coil, a movable iron core and a plug. The upper end of the shell is communicated with the gas consumption unit; the valve seat is fixed to the shell, and a gap is reserved between the inner wall of the shell and the valve seat. An air inlet hole and a first air outlet hole are respectively formed in the valve seat; the air inlet is communicated with an air source; the upper end of the first air outlet communicates with the air inlet, and the lower end of the first air outlet communicates with the inner cavity of the shell. The movable iron core is arranged in the shell below the valve seat in a sliding and sleeved mode, and a gap is reserved between the movable iron core and the inner wall of the shell. The plug is arranged in the lower end of the shell; a first permanent magnet is arranged at the lower end of the movable iron core, and a second permanent magnet is arranged in the plug; the ends, close to each other, of the first permanent magnet and the second permanent magnet are of the same polarity, and the movable iron core is driven to move upwards through repulsive force of the second permanent magnet. An air leakage hole is formed in the plug; and the coil is wound on the shell on the outer side of the movable iron core.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a permanent magnet controlled electromagnetic valve. Background Art

[0002] The solenoid valve is the main regulating unit for controlling the airbag in the car seat. The solenoid valve used in the car seat is mainly used to control the inflation and deflation of the airbag. Its structure generally includes a bobbin, a spring, a coil, a movable iron core, an iron and a buckle, etc., and the movement of the movable iron core is controlled by energizing and de-energizing the coil, thereby achieving the purpose of controlling the inflation and deflation of the airbag connected to the solenoid valve. The existing solenoid valve has a relatively complex structure, a large volume, and a high production and maintenance cost, which makes it difficult to meet actual usage needs. Utility Model Content

[0003] The purpose of the utility model is to provide a permanent magnet controlled solenoid valve, which has a simple structure, a small volume, and low production and maintenance costs. The upper end of the shell is connected to an air-using unit such as an air bag. Since the inner cavity of the shell is large, the area of ​​the gas passage during inflation and deflation can be increased, and the use effect is good.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A permanent magnet controlled solenoid valve, comprising a shell, a valve seat, a coil, a movable iron core and a plug; the upper end of the shell is connected to an air unit; the valve seat is fixed on the shell, and a gap is left between the inner wall of the shell and the valve seat; an air inlet and a first air outlet are respectively arranged in the valve seat; the air inlet is connected to an air source; the upper end of the first air outlet is connected to the air inlet, and the lower end of the first air outlet is connected to the inner cavity of the shell; the movable iron core is slidably sleeved in the shell below the valve seat, and the movable iron core is connected to the inner cavity of the shell A gap is left between the walls; the plug is arranged inside the lower end of the shell; a first permanent magnet is arranged at the lower end of the movable iron core, and a second permanent magnet is arranged in the plug; the first permanent magnet and the second permanent magnet are close to each other at one end and have the same polarity, and the movable iron core is driven to move up by the repulsive force of the second permanent magnet to close the first air outlet; an air leakage hole is arranged in the plug; the coil is wound on the shell outside the movable iron core, and the movable iron core is driven to move down by energizing the coil to open the first air outlet and close the air leakage hole.

[0006] Furthermore, a silencer block is fixed in the shell above the valve seat; and a plurality of silencer holes are arranged on the silencer block.

[0007] Furthermore, a sealing rubber block is fixed to the upper end of the movable iron core.

[0008] Furthermore, a sealing rubber ring is provided at the upper end of the plug; a plurality of first clips are provided on the side wall of the plug; a plurality of first slots are provided at the lower end of the shell, and the sealing rubber ring is tightly clamped between the plug and the shell by embedding the first clips into the first slots.

[0009] Furthermore, an annular sealing convex strip is fixed to the upper end of the sealing rubber ring near the first permanent magnet.

[0010] Furthermore, a compression spring is arranged in the air leakage hole; the lower end of the compression spring abuts against the air leakage hole, and the upper end of the compression spring abuts against the movable iron core.

[0011] Furthermore, a second air outlet is provided in the valve seat; one end of the second air outlet is connected to the air inlet, and the other end of the second air outlet is connected to the air inlet of the adjacent valve seat.

[0012] Furthermore, the valve seat is provided with a plurality of second slots at one end close to the air inlet, and a plurality of second buckles at one end close to the second air outlet, and the adjacent valve seats are tightly connected together by embedding the second buckles into the second slots of adjacent valve seats.

[0013] Furthermore, a sealing ring is provided on the outer wall of the valve seat close to the second air outlet.

[0014] After adopting the above technical solution, the utility model has the following beneficial effects:

[0015] 1. The utility model is a permanent magnet controlled solenoid valve with simple structure, small size, low production and maintenance costs, and the upper end of the shell is connected to the air bag and other gas-using units. Since the inner cavity of the shell is large, the area of ​​the gas passage during inflation and deflation can be increased, and the use effect is good.

[0016] 2. The utility model provides a permanent magnet controlled solenoid valve, and a plurality of silencer holes are arranged on the silencer block, which can reduce the noise during inflation or deflation. In addition, the soft sealing rubber block and the sealing rubber ring can not only improve the sealing performance of the movable iron core to the first air outlet and the air deflation hole, but also realize the soft contact between the movable iron core and the sealing rubber block and the sealing rubber ring, respectively, which can reduce the noise when the first air outlet and the air deflation hole are closed.

[0017] 3. The utility model is a permanent magnet controlled solenoid valve, the lower end of the compression spring abuts against the vent hole, and the upper end of the compression spring abuts against the movable iron core, which can further improve the sealing effect of the sealing rubber block at the upper end of the movable iron core on the first air outlet.

[0018] 4. The utility model provides a permanent magnet controlled solenoid valve, wherein a plurality of second slots are provided at one end of the valve seat near the air inlet, and a plurality of second buckles are provided at one end of the valve seat near the second air outlet. Adjacent valve seats can be tightly connected together by embedding the second buckles into the second slots of adjacent valve seats, and a plurality of permanent magnet controlled solenoid valves can be connected in series for use. When the plurality of permanent magnet controlled solenoid valves are used in series, the air inlet on the first valve seat is connected to the air source, and the second air outlet on the last valve seat is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic structural diagram of the parallel second air outlet of the utility model;

[0021] Figure 3 It is a schematic structural diagram of the vertically cut second air outlet of the utility model.

[0022] The reference numerals in the figure are as follows:

[0023] 1. Shell; 10. First slot; 2. Valve seat; 20. Air inlet; 21. First air outlet; 22. Second air outlet; 23. Second slot; 24. Second buckle; 25. Sealing ring; 3. Coil; 4. Movable iron core; 40. First permanent magnet; 41. Sealing rubber block; 5. Plug; 50. Second permanent magnet; 51. Air vent; 52. First buckle; 53. Compression spring; 6. Silencer block; 60. Silencer hole; 7. Sealing rubber ring; 70. Sealing convex strip. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] See also Figures 1 to 3A permanent magnet controlled solenoid valve comprises a shell 1, a valve seat 2, a coil 3, a movable iron core 4 and a plug 5; the upper end of the shell 1 is connected to the gas unit; the valve seat 2 is fixed on the shell 1, and a gap is left between the inner wall of the shell 1 and the valve seat 2; an air inlet 20 and a first air outlet 21 are respectively arranged in the valve seat 2; the air inlet 20 is connected to the air source; the upper end of the first air outlet 21 is connected to the air inlet 20, and the lower end of the first air outlet 21 is connected to the inner cavity of the shell 1; the movable iron core 4 is slidably sleeved in the shell 1 below the valve seat 2, and the movable iron core 4 is connected to the shell 1 A gap is left between the inner walls; the plug 5 is arranged inside the lower end of the shell 1; a first permanent magnet 40 is arranged at the lower end of the movable iron core 4, and a second permanent magnet 50 is arranged in the plug 5; the first permanent magnet 40 and the second permanent magnet 50 are close to each other at one end and have the same polarity, and the movable iron core 4 is driven to move up by the repulsive force of the second permanent magnet 50 to close the first air outlet 21; an air leakage hole 51 is arranged in the plug 5; the coil 3 is wound on the shell 1 outside the movable iron core 4, and the movable iron core 4 is driven to move down by energizing the coil 3 to open the first air outlet 21 and close the air leakage hole 51.

[0026] like Figures 1 to 3 As shown, a muffler block 6 is fixed in the housing 1 above the valve seat 2; and a plurality of muffler holes 60 are provided on the muffler block 6.

[0027] like Figures 1 to 3 As shown, a sealing rubber block 41 is fixed to the upper end of the movable iron core 4 .

[0028] like Figures 1 to 3 As shown, a sealing rubber ring 7 is provided at the upper end of the plug 5; a plurality of first clips 52 are provided on the side wall of the plug 5; a plurality of first slots 10 are provided at the lower end of the shell 1, and the sealing rubber ring 7 is tightly clamped between the plug 5 and the shell 1 by embedding the first clips 52 into the first slots 10.

[0029] like Figures 1 to 3 As shown, an annular sealing convex strip 70 is fixed at the upper end of the sealing rubber ring 7 near the first permanent magnet 40 .

[0030] like Figures 1 to 3 As shown, a compression spring 53 is arranged in the air leakage hole 51 ; the lower end of the compression spring 53 abuts against the air leakage hole 51 , and the upper end of the compression spring 53 abuts against the movable iron core 4 .

[0031] like Figures 1 to 3 As shown, a second air outlet 22 is provided in the valve seat 2 ; one end of the second air outlet 22 is communicated with the air inlet 20 , and the other end of the second air outlet 22 is communicated with the air inlet 20 of the adjacent valve seat 2 .

[0032] like Figures 1 to 3As shown, the valve seat 2 is provided with a plurality of second slots 23 at one end close to the air inlet 20, and a plurality of second buckles 24 at one end close to the second air outlet 22. The second buckles 24 are embedded in the second slots 23 of adjacent valve seats 2 to tightly connect adjacent valve seats 2 together.

[0033] like Figures 1 to 3 As shown, a sealing ring 25 is provided on the outer wall of the valve seat 2 close to the second air outlet 22 .

[0034] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0036] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0037] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0038] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0039] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0040] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A permanent magnet controlled solenoid valve, characterized in that: The invention comprises a shell (1), a valve seat (2), a coil (3), a movable iron core (4) and a plug (5); the upper end of the shell (1) is connected to the gas unit; the valve seat (2) is fixed on the shell (1), and a gap is left between the inner wall of the shell (1) and the valve seat (2); an air inlet (20) and a first air outlet (21) are respectively arranged in the valve seat (2); the air inlet (20) is connected to the air source; the upper end of the first air outlet (21) is connected to the air inlet (20), and the lower end of the first air outlet (21) is connected to the inner cavity of the shell (1); the movable iron core (4) is slidably sleeved in the shell (1) below the valve seat (2), and a gap is left between the movable iron core (4) and the inner wall of the shell (1). A gap is left; the plug (5) is arranged inside the lower end of the shell (1); a first permanent magnet (40) is arranged at the lower end of the movable iron core (4), and a second permanent magnet (50) is arranged inside the plug (5); the first permanent magnet (40) and the second permanent magnet (50) are close to each other at one end and have the same polarity, and the repulsive force of the second permanent magnet (50) drives the movable iron core (4) to move upward to close the first air outlet (21); the plug (5) is provided with an air leakage hole (51); the coil (3) is wound on the shell (1) outside the movable iron core (4), and the coil (3) is energized to drive the movable iron core (4) to move downward to open the first air outlet (21) and close the air leakage hole (51).

2. A permanent magnet controlled solenoid valve as claimed in claim 1, characterized in that: A silencer block (6) is fixed in the housing (1) above the valve seat (2); a plurality of silencer holes (60) are provided on the silencer block (6).

3. A permanent magnet controlled solenoid valve as claimed in claim 1, characterized in that: A sealing rubber block (41) is fixed to the upper end of the movable iron core (4).

4. A permanent magnet controlled solenoid valve as claimed in claim 1, characterized in that: The upper end of the plug (5) is provided with a sealing rubber ring (7); the side wall of the plug (5) is provided with a plurality of first buckles (52); the lower end of the shell (1) is provided with a plurality of first slots (10), and the sealing rubber ring (7) is tightly clamped between the plug (5) and the shell (1) by inserting the first buckles (52) into the first slots (10).

5. A permanent magnet controlled solenoid valve as claimed in claim 4, characterized in that: An annular sealing convex strip (70) is fixed at a position of the upper end of the sealing rubber ring (7) close to the first permanent magnet (40).

6. A permanent magnet controlled solenoid valve as claimed in claim 1, characterized in that: A compression spring (53) is arranged in the air leakage hole (51); the lower end of the compression spring (53) abuts against the air leakage hole (51), and the upper end of the compression spring (53) abuts against the movable iron core (4).

7. A permanent magnet controlled solenoid valve as claimed in claim 1, characterized in that: A second air outlet (22) is provided in the valve seat (2); one end of the second air outlet (22) is connected to the air inlet (20), and the other end of the second air outlet (22) is connected to the air inlet (20) of the adjacent valve seat (2).

8. A permanent magnet controlled solenoid valve as claimed in claim 7, characterized in that: The valve seat (2) is provided with a plurality of second slots (23) at one end close to the air inlet (20), and a plurality of second buckles (24) are provided at one end close to the second air outlet (22), and the adjacent valve seats (2) are tightly connected together by embedding the second buckles (24) in the second slots (23) of adjacent valve seats (2).

9. A permanent magnet controlled solenoid valve as claimed in claim 8, characterized in that: A sealing ring (25) is provided on the outer wall of the valve seat (2) close to the second air outlet (22).

Images