Waist rest control valve

Abstract

The utility model discloses a waist rest control valve which comprises a supporting frame and a plurality of valve bodies fixed on the supporting frame, each valve body is provided with a first cavity and a second cavity, the first cavity and the second cavity are respectively provided with a first piston rod and a second piston rod, each valve body is provided with an air inlet, and each air inlet is provided with an air outlet. The first cavity and the second cavity are communicated, the first cavity and the second cavity are provided with vibration reduction assemblies, each vibration reduction assembly comprises a supporting ring and a first spring, and a plurality of telescopic cylinders are evenly distributed on the supporting ring with a circle point as the axis. Through the vibration reduction assembly and the first vibration reduction ring and the second vibration reduction ring matched with the vibration reduction assembly, radial irregular vibration of the first piston rod and the second piston rod is absorbed, axis deviation between the first piston rod and the second piston rod and the axis deviation between the first piston rod and the second piston rod and between the second piston rod and the first cavity and between the first piston rod and the second cavity are reduced; and the product has the advantages of vibration resistance, leakage prevention and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a lumbar support control valve. Background Art

[0002] The lumbar control valve is a valve installed on the car seat to control the switch of the seat back airbag. The valve can be designed with one or more valve positions to control multiple seat airbags installed in different positions. The principle of the lumbar control valve is to adjust the inflation volume of the airbag through the buttons of the air intake switch and the exhaust switch, thereby adjusting the comfort of the human body. However, in actual use, it is necessary to adapt to various air pressures of different models, meet the usage habits of different customers, and consider the airbag's own resistance to air pressure and explosion, so very stringent requirements are placed on the design of the valve.

[0003] When a car is moving and encounters a bumpy road, the piston inside the valve body will vibrate, causing the axis of the piston to be offset from the axis of the valve body. When the piston is moving up and down, friction is generated between the piston and the valve body, increasing the gap between the piston and the valve body, causing gas leakage inside the valve body. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional lumbar control valve design and provide a product with vibration resistance and leakage prevention.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A lumbar support control valve comprises a support frame and a plurality of valve bodies fixed on the support frame, the valve body being provided with a first cavity and a second cavity, the first cavity and the second cavity being provided with a first piston rod and a second piston rod respectively, the valve body being provided with an air inlet and being connected with the first cavity and the second cavity, the first cavity and the second cavity being provided with a vibration reduction assembly, the vibration reduction assembly comprising a support ring and a first spring, the support ring being provided with a plurality of retractable cylinders evenly distributed around a dot as an axis, the first spring abutting against the inner walls of the cylinder and the support ring so that the cylinder abuts against the first piston rod and the second piston rod.

[0007] Preferably, the first cavity and the second cavity are provided with a clearance through hole, the clearance through hole is provided with a countersunk hole, the support ring is fixed in the countersunk hole, the support ring is provided with a plurality of clearance grooves evenly distributed with the circle as the axis, the clearance groove is provided with a notch, the cylinder is arranged in the notch, the cylinder is provided with a limit plate and abuts against the clearance groove, the first spring abuts against the limit plate and the clearance groove, and the end face shape of the cylinder is set to be spherical.

[0008] Preferably, the first cavity is provided with an air intake duct, the second cavity is provided with an exhaust duct, the adjacent air intake ducts and exhaust ducts are connected to each other, the inner walls of the first cavity and the second cavity are provided with a first vibration damping ring and abut against a support ring, the inner wall of the first cavity is also provided with a second vibration damping ring, and the second cavity is provided with a vibration damping pad.

[0009] Preferably, the first cavity is provided with a first connecting column and abuts against the second vibration damping ring, the first connecting column is provided with a cavity and communicates with the air intake pipe, and third vibration damping rings are provided at both ends of the cavity.

[0010] Preferably, the second cavity is provided with a second connecting column, the second connecting column is provided with a blind hole and is connected to the exhaust pipe, the blind hole is provided with a push rod and a second spring, the push rod is provided with a retaining ring and maintains a distance from the inner wall of the blind hole, the push rod is provided with a hollow column, the inner wall of the hollow column is provided with a plurality of air holes, the second spring abuts against the end face of the blind hole and the retaining ring, so that the retaining ring abuts against the vibration damping pad, so as to seal the blind hole.

[0011] Preferably, the first piston rod and the second piston rod pass through the clearance hole and maintain a distance from the inner wall of the clearance hole. The first piston rod and the second piston rod are provided with O-rings and abut against the first vibration damping ring and the support ring. The first piston rod and the second piston rod are provided with a retaining spring, and the valve body is provided with a third spring and abuts against the retaining spring.

[0012] Preferably, the first piston rod also passes through the first connecting column and abuts the third vibration damping ring. The first piston rod is provided with a vibration damping pad and abuts the second vibration damping ring. Both ends of the vibration damping pad are provided with O-rings and abut the second vibration damping ring. A third cavity is provided inside the first piston rod, and the third cavity is provided with an input port and an output port. The second piston rod abuts the push rod and maintains a distance from the inner wall of the hollow column.

[0013] Preferably, the heads of the first piston rod and the second piston rod are provided with button covers, and the button covers are provided with an air intake bump and an air exhaust bump, the air intake bump abuts against the first piston rod, and the air exhaust bump abuts against the second piston rod.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model, when the supporting frame is subjected to the bumpy vibration of the automobile, absorbs the radial irregular vibration of the first piston rod and the second piston rod through the vibration reduction assembly and the first vibration reduction ring and the second vibration reduction ring, so that the first piston rod and the second piston rod reduce the axial deviation with the first cavity and the second cavity in the process of moving up and down; by arranging a plurality of O-rings on the surface of the first piston rod and the second piston rod through a clearance hole, the first piston rod and the second piston rod are prevented from generating friction with the clearance hole due to irregular radial movement while ensuring the sealing performance; at the same time, a part of margin is reserved for the vibration reduction assembly to absorb the irregular radial vibration; the above-mentioned design overcomes the problem proposed in the background technology that when the piston is in the up and down movement, friction is generated between the piston and the valve body, the gap between the piston and the valve body is increased, and the gas leakage inside the valve body is caused, so that the product has the advantages of vibration resistance and leakage prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a lumbar support control valve of the utility model;

[0018] Figure 2 It is a schematic diagram of the side cross-section structure of a lumbar support control valve of the utility model;

[0019] Figure 3 For this utility model Figure 2 A partial structure enlarged view of detail A of a lumbar support control valve;

[0020] Figure 4 It is a schematic diagram of the side cross-sectional structure of a first cavity of a lumbar support control valve of the utility model;

[0021] Figure 5 It is a schematic diagram of the side cross-sectional structure of the second cavity of a lumbar support control valve of the utility model;

[0022] Figure 6 This is a structural schematic diagram of a support ring of a lumbar support control valve of the utility model;

[0023] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0024] Figure numerals: 1, support frame; 2, valve body; 3, first piston rod; 4, second piston rod; 5, vibration reduction assembly; 6, O-ring; 7, retaining spring; 8, button cover; 21, first cavity; 22, second cavity; 23, air inlet; 24, clearance hole; 25, first vibration reduction ring; 26, ejector rod; 27, second spring; 28, third spring; 29, vibration reduction pad; 211, air inlet pipe; 212, second vibration reduction ring; 213, first connection Column; 214, cavity; 215, third vibration damping ring; 221, exhaust pipe; 222, blind hole; 223, second connecting column; 241, countersunk hole; 261, retaining ring; 262, hollow column; 263, air vent; 31, third cavity; 32, input port; 33, output port; 51, support ring; 52, first spring; 53, cylinder; 54, make way groove; 55, notch; 56, limit plate; 81, intake bump; 82, exhaust bump. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] Reference example Figures 1 to 6 A lumbar control valve comprises a support frame 1 and a plurality of valve bodies 2 fixed on the support frame 1, the valve body 2 is provided with a first cavity 21 and a second cavity 22, the first cavity 21 and the second cavity 22 are provided with a first piston rod 3 and a second piston rod 4 respectively, the valve body 2 is provided with an air inlet 23 and is communicated with the first cavity 21 and the second cavity 22, the first cavity 21 and the second cavity 22 are provided with a vibration reduction assembly 5, the vibration reduction assembly 5 comprises a support ring 51 and a first spring 52, the support ring 51 is provided with a plurality of retractable cylinders 53 evenly distributed around a dot as an axis, the first spring 52 abuts against the inner wall of the cylinder 53 and the support ring 51, so that the cylinder 53 abuts against the first piston rod 3 and the second piston rod 4;

[0028] It is worth mentioning that the first cavity 21 and the second cavity 22 are provided with a clearance through hole 24, the clearance through hole 24 is provided with a countersunk hole 241, the support ring 51 is fixed in the countersunk hole 241, the support ring 51 is evenly distributed with a plurality of clearance grooves 54 with the dot as the axis, the clearance groove 54 is provided with a notch 55, the cylinder 53 is arranged in the notch 55, the cylinder 53 is provided with a limit plate 56, and abuts against the clearance groove 54, the first spring 52 abuts against the limit plate 56 and the clearance groove 54, the end face shape of the cylinder 53 is set to be spherical, and a plurality of O-rings 6 are set on the surface of the first piston rod 3 and the second piston rod 4 through the clearance through hole 24 , under the premise of ensuring sealing, the first piston rod 3 and the second piston rod 4 are prevented from generating friction with the relinquishing through hole 24 due to irregular radial movement. At the same time, a part of margin is reserved for the vibration reduction component 5 to absorb irregular radial vibration. The countersunk hole 241 provides a holding space for the support ring 51, and the relinquishing groove 54 is used to limit the extension distance of the cylinder 53 and provide a holding space for the first spring 52. The notch 55 facilitates the telescopic movement of the cylinder 53. The limiting plate 56 is used in conjunction with the limiting groove. The first spring 52 absorbs vibration and releases elastic force. The spherical design reduces the friction between the first piston rod 3, the second piston rod 4 and the cylinder 53;

[0029] It is worth mentioning that the first cavity 21 is provided with an air intake pipe 211, the second cavity 22 is provided with an exhaust pipe 221, the inner walls of the first cavity 21 and the second cavity 22 are provided with a first vibration damping ring 25, and abut against the support ring 51, the inner wall of the first cavity 21 is also provided with a second vibration damping ring 212, the second cavity 22 is provided with a vibration damping pad 29, the air intake pipe 211 is connected to the airbag for inflating the airbag, the exhaust pipe 221 is mainly used for exhaust, the first vibration damping ring 25 absorbs the radial irregular movement generated by the first piston rod 3 and the second piston rod 4, the second vibration damping ring 212 absorbs the radial irregular movement generated by the first piston rod 3, and the vibration damping pad 29 buffers the impact force between the retaining ring 261 and the second cavity 22;

[0030] It is worth mentioning that the first cavity 21 is provided with a first connecting column 213, and abuts against the second vibration damping ring 212. The first connecting column 213 is provided with a cavity 214, and is communicated with the intake pipe 211. The two ends of the cavity 214 are provided with third vibration damping rings 215. The first connecting column 213 cooperates with the O-ring 6 in the first cavity 21 to ensure the sealing of the first cavity 21. The cavity 214 is used in conjunction with the output port 33. The third vibration damping ring 215 absorbs the radial irregular movement generated by the first piston rod 3.

[0031] It is worth mentioning that the second cavity 22 is provided with a second connecting column 223, the second connecting column 223 is provided with a blind hole 222, and is communicated with the exhaust pipe 221, the blind hole 222 is provided with a push rod 26 and a second spring 27, the push rod 26 is provided with a retaining ring 261, and is spaced from the inner wall of the blind hole 222, the push rod 26 is provided with a hollow column 262, the inner wall of the hollow column 262 is provided with a plurality of air holes 263, the second spring 27 abuts against the end face of the blind hole 222 and the retaining ring 261, so that the retaining ring 261 abuts against the end face of the blind hole 222 and the retaining ring 261, The second connecting column 223 cooperates with the O-ring 6 in the second cavity 22 to ensure the sealing of the second cavity 22. The blind hole 222 provides a guide for the ejector 26 and provides a support for the second spring 27. The retaining ring 261 cooperates with the vibration-damping pad 29 of the second cavity 22. The hollow column 262 cooperates with the second piston rod 4. The air hole 263 facilitates the passage of gas. The second spring 27 cooperates with the retaining ring 261 to reset the ejector 26.

[0032] It is worth mentioning that the first piston rod 3 and the second piston rod 4 pass through the clearance hole 24 and keep a distance from the inner wall of the clearance hole 24. The first piston rod 3 and the second piston rod 4 are provided with O-rings 6 and abut against the first vibration damping ring 25 and the support ring 51. The first piston rod 3 and the second piston rod 4 are provided with retaining springs 7. The valve body 2 is provided with a third spring 28 and abuts against the retaining spring 7. The distance is to leave a part of the margin for the vibration damping component 5 to absorb irregular radial vibration. The O-ring 6 ensures that the first piston rod 3 and the second piston rod 4 do not leak the gas medium inside the first cavity 21 and the second cavity 22 during the movement or static state. The retaining spring 7 is used in conjunction with the third spring 28. The third spring 28 resets the first piston rod 3 and the second piston rod 4 after being pressed.

[0033] It is worth mentioning that the first piston rod 3 also passes through the first connecting column 213 and abuts the third vibration damping ring 215. The first piston rod 3 is provided with a vibration damping pad 29 and abuts the second vibration damping ring 212. Both ends of the vibration damping pad 29 are provided with O-rings 6 and abut the second vibration damping ring 212. A third cavity 31 is provided inside the first piston rod 3. The third cavity 31 is provided with an input port 32 and an output port 33. The second piston rod 4 abuts the push rod 26 and keeps a distance from the inner wall of the hollow column 262. The vibration damping pad 29 provided on the first piston rod 3 absorbs and buffers the up and down movement of the first piston rod 3. The impact force of the O-rings 6 at both ends of the vibration damping pad 29 and the first connecting column 213 and the first cavity 21, the gas enters the third cavity 31 through the input port 32, the gas medium enters the distance between the second piston rod 4 and the inner wall of the hollow column 262, and is discharged through the air vent 263;

[0034] It is worth mentioning that a button cover 8 is provided at the head of the first piston rod 3 and the second piston rod 4. The button cover 8 is provided with an air intake bump 81 and an air exhaust bump 82. The air intake bump 81 abuts against the first piston rod 3, and the air exhaust bump 82 abuts against the second piston rod 4. The button cover 8 facilitates the operation of the first piston rod 3 and the second piston rod 4. The air intake bump 81 facilitates the operation of the first piston rod 3 alone, and the air exhaust bump 82 facilitates the operation of the second piston rod 4 alone.

[0035] The use principle of the utility model is now described as follows:

[0036] When the air inlet 23 delivers gaseous medium into the first cavity 21 and the second cavity 22, and applies pressure to the air inlet protrusion 81, the first piston rod 3 moves downward, and the third spring 28 is in an energy storage state. At this time, the output port 33 passes through the third vibration damping ring 215 and enters the cavity 214. The gaseous medium enters the third cavity 31 through the input port 32, and enters the cavity 214 through the output port 33, and enters the airbag from the air inlet pipe 211 to inflate the airbag.

[0037] The air inlet 23 stops delivering the gas medium, and applies downward pressure to the exhaust protrusion 82 again, so that the second piston rod 4 moves downward, so that the third spring 28 accumulates energy, and the second piston rod 4 pushes the push rod 26 to move downward, so that the second spring 27 accumulates energy, and the compressed gas medium inside the airbag passes through the output port 33, the third cavity 31, the input port 32, and the air hole 263 in sequence, and enters the blind hole 222. The gas medium passes through the gap between the retaining ring 261 and the inner wall of the blind hole 222, enters the exhaust pipe 221 and is discharged, so that the pressure inside the airbag is reduced;

[0038] When the support frame 1 is subjected to the bumpy vibration of the car, the first piston rod 3 and the second piston rod 4 will vibrate irregularly in the radial direction, and the cylinder 53 will be affected by the external force of the first piston rod 3 and the second piston rod 4, so that the limit plate 56 will move in the direction of the yield groove 54 opposite to the limit plate 56, and the first spring 52 will be squeezed and store energy to absorb the irregular radial vibration of the first piston rod 3 and the second piston rod 4. At the same time, the first vibration damping ring 25 and the second vibration damping ring 212 absorb and digest the vibration of the first piston rod 3 and the second piston rod 4 due to their own material and elastic changes, thereby reducing the axial deviation from the first cavity 21 and the second cavity 22, and avoiding the first piston rod 3 and the second piston rod 4 from rubbing against the yield through hole 24 due to irregular radial movement.

[0039] The above design scheme can make the product have the advantages of vibration resistance and leakage prevention.

[0040] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A lumbar support control valve, comprising a support frame (1), and a plurality of valve bodies (2) fixed on the support frame (1), characterized in that: The valve body (2) is provided with a first cavity (21) and a second cavity (22), and the first cavity (21) and the second cavity (22) are provided with a first piston rod (3) and a second piston rod (4) respectively. The valve body (2) is provided with an air inlet (23) and is in communication with the first cavity (21) and the second cavity (22). The first cavity (21) and the second cavity (22) are provided with a vibration reduction assembly (5), and the vibration reduction assembly (5) comprises a support ring (51) and a first spring (52). The support ring (51) is provided with a plurality of retractable cylinders (53) evenly distributed around a circle as an axis, and the first spring (52) abuts against the inner walls of the cylinder (53) and the support ring (51), so that the cylinder (53) abuts against the first piston rod (3) and the second piston rod (4).

2. The lumbar support control valve according to claim 1, characterized in that: The first cavity (21) and the second cavity (22) are provided with a clearance through hole (24), the clearance through hole (24) is provided with a countersunk hole (241), the support ring (51) is fixed on the countersunk hole (241), the support ring (51) is provided with a plurality of clearance grooves (54) evenly distributed around a circle as an axis, the clearance groove (54) is provided with a notch (55), the cylinder (53) is arranged in the notch (55), the cylinder (53) is provided with a limiting plate (56) and abuts against the clearance groove (54), the first spring (52) abuts against the limiting plate (56) and the clearance groove (54), and the end face shape of the cylinder (53) is set to be spherical.

3. The lumbar support control valve according to claim 2, characterized in that: The first cavity (21) is provided with an air intake duct (211), and the second cavity (22) is provided with an air exhaust duct (221); the adjacent air intake ducts (211) and air exhaust ducts (221) are connected to each other; the inner walls of the first cavity (21) and the second cavity (22) are provided with first vibration-damping rings (25) that abut against a support ring (51); the inner wall of the first cavity (21) is also provided with a second vibration-damping ring (212); and the second cavity (22) is provided with a vibration-damping pad (29).

4. The lumbar support control valve according to claim 3, characterized in that: The first cavity (21) is provided with a first connecting column (213) and abuts against a second vibration damping ring (212); the first connecting column (213) is provided with a cavity (214) and communicates with an air intake pipe (211); and third vibration damping rings (215) are provided at both ends of the cavity (214).

5. The lumbar support control valve according to claim 4, characterized in that: The second cavity (22) is provided with a second connecting column (223), the second connecting column (223) is provided with a blind hole (222) and is communicated with the exhaust pipe (221), the blind hole (222) is provided with a push rod (26) and a second spring (27), the push rod (26) is provided with a retaining ring (261) and is spaced apart from the inner wall of the blind hole (222), the push rod (26) is provided with a hollow column (262), the inner wall of the hollow column (262) is provided with a plurality of air holes (263), the second spring (27) abuts against the end surface of the blind hole (222) and the retaining ring (261), so that the retaining ring (261) abuts against the vibration damping pad (29), so as to seal the inside of the blind hole (222).

6. The lumbar support control valve according to claim 5, characterized in that: The first piston rod (3) and the second piston rod (4) pass through the clearance hole (24) and maintain a distance from the inner wall of the clearance hole (24); the first piston rod (3) and the second piston rod (4) are provided with O-rings (6) and abut against the first vibration damping ring (25) and the support ring (51); the first piston rod (3) and the second piston rod (4) are provided with retaining springs (7); the valve body (2) is provided with a third spring (28) and abuts against the retaining spring (7).

7. The lumbar support control valve according to claim 6, characterized in that: The first piston rod (3) also passes through the first connecting column (213) and abuts against the third vibration damping ring (215). The first piston rod (3) is provided with a vibration damping pad (29) and abuts against the second vibration damping ring (212). Both ends of the vibration damping pad (29) are provided with O-rings (6) and abut against the second vibration damping ring (212). A third cavity (31) is provided inside the first piston rod (3). The third cavity (31) is provided with an input port (32) and an output port (33). The second piston rod (4) abuts against the ejector rod (26) and maintains a distance from the inner wall of the hollow column (262).

8. The lumbar support control valve according to claim 7, characterized in that: The heads of the first piston rod (3) and the second piston rod (4) are provided with button covers (8), and the button covers (8) are provided with an air intake bump (81) and an air exhaust bump (82), the air intake bump (81) abuts against the first piston rod (3), and the air exhaust bump (82) abuts against the second piston rod (4).

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