Inflation and deflation control device of low-cost seat waist support air bag

Abstract

The utility model belongs to the technical field of seats, and particularly relates to a low-cost inflation and deflation control device for a seat waist support air bag, which comprises a seat and an air bag arranged on a seat backrest close to the waist, and the air bag comprises an upper air bag and a lower air bag. And an air pump, an upper electromagnetic valve for controlling the air pump to inflate and deflate the upper air bag, a lower electromagnetic valve for controlling the air pump to inflate and deflate the lower air bag, and first, second, third and fourth waist support switches for controlling the air pump to be in four inflating and deflating states of the upper air bag and the lower air bag are arranged on the seat. The seat has the advantages of simple structure, low production cost, few consumed materials, short design and production period, safety and reliability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chair technical field, especially relate to a low -cost seat waist support air bag's inflation control device. BACKGROUND

[0002] At present, the inflation control of the seat waist support mostly uses modular design, detects switch input, and carries out output after MCU processing to control the inflation or deflation of the waist support, which needs to design hardware and software, uses module design to consume more manpower and material resources, and has more EMC experiment problems, consumes time, material and objects, and has high production cost. SUMMARY

[0003] The utility model aims at providing a seat waist support with simple structure and low production cost.

[0004] The utility model aims at solving the problem in this way:

[0005] A low -cost seat waist support air bag's inflation control device, including seat and the air bag of setting on the seat backrest near the waist, the air bag includes upper air bag and lower air bag, be provided with air pump, control air pump for the upper air bag inflation and deflation upper electromagnetic valve, control air pump for the lower air bag inflation and deflation lower electromagnetic valve and control air pump for the first, second, third, fourth waist support switch of four kinds of inflation and deflation state of upper air bag and lower air bag.

[0006] As a further optimization of the above technical solution, one end of the first waist support switch is connected to a power supply, the other end is connected to a fifth diode, and the other end is connected to the air pump; after the first waist support switch is turned on, the fifth diode is turned on, and the air pump works to inflate the upper and lower air bags, forming an upper and lower air bag inflation state.

[0007] As a further optimization of the above technical solution, one end of the second waist support switch is connected to a power supply, the other end is connected to a third and fourth diode, and the other end is connected to the air pump; after the second waist support switch is turned on, the third and fourth diodes are turned on, and the air pump works to inflate the lower air bag, forming a lower air bag inflation state.

[0008] As a further optimization of the above technical solution, one end of the third waist support switch is connected to a power supply, the other end is connected to a fifth diode, and the other end is connected to the air pump; after the third waist support switch is turned on, the fifth diode is turned on, and the air pump works to inflate the upper and lower air bags, forming an upper and lower air bag inflation state.

[0009] As a further optimization of the above technical solution, one end of the fourth waist support switch is connected to a power supply, and the other end is connected to an upper electromagnetic valve and a lower electromagnetic valve through the sixth and seventh diodes in parallel; after the fourth waist support switch is turned on, the sixth and seventh diodes are turned on, the upper and lower electromagnetic valves are powered on to control the upper and lower air bags to exhaust, and an upper and lower air bag exhaust state is formed.

[0010] As a further optimization of the above technical solution, a sound insulation and shock absorption felt plate is fixed to the front surface of the seat back near the waist, and the upper and lower air bags are fixed to the felt plate through plastic buckles.

[0011] As a further optimization of the above technical solution, the air pump and the upper and lower electromagnetic valves are arranged in the sound insulation felt bag, the air inlets of the upper and lower electromagnetic valves are communicated with the air outlet of the air pump through soft pipes, the air outlets of the upper and lower electromagnetic valves are respectively communicated with the inner cavities of the upper and lower air bags through soft pipes, and the air outlets of the upper and lower electromagnetic valves are communicated with the atmosphere.

[0012] As a further optimization of the above technical solution, the first, second, third and fourth waist support switches are all button switches or key switches.

[0013] As a further optimization of the above technical solution, the upper and lower electromagnetic valves are all three-position three-way electromagnetic valves; when the three-position three-way electromagnetic valves are not powered on, the air outlet of the air pump is communicated with the inner cavities of the air bags; when the electromagnet on one side of the three-position three-way electromagnetic valves is powered on, the inner cavities of the air bags are communicated with the air outlets to exhaust; and when the electromagnet on the other side of the three-position three-way electromagnetic valves is powered on, the air bags are disconnected from the air path of the air pump.

[0014] The positive effects of the present application compared with the prior art are as follows:

[0015] 1. The present application can control the air pump to inflate or exhaust the air bag through simple key switches or button switches, simple diodes and electromagnetic valves, so that the structure is simple, the production cost is low, the materials consumed are few, the design and production cycle are short, and the safety is reliable.

[0016] 2. The upper and lower air bags of the present application are fixed to the sound insulation and shock absorption felt plate through plastic buckles, which has a soft supporting protection effect on the frequent inflation and deflation of the air bag, and can also reduce the noise and vibration produced by the frequent inflation and deflation of the air bag.

[0017] 3. The air pump and the upper and lower electromagnetic valves of the present application are arranged in the sound insulation felt bag, which can effectively reduce the transmission of vibration sound produced by the working of the air pump and the upper and lower electromagnetic valves, and provide a good experience for people sitting on the seat. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1It is the structure exploded view of the air bag, air pump, electromagnetic valve and its felt board and felt bag of the utility model.

[0019] Figure 2 It is the connection structure schematic view of the air bag, air pump, electromagnetic valve and its felt board and felt bag of the utility model.

[0020] Figure 3 It is the circuit principle diagram of the utility model.

[0021] Figure 4 It is the three working state schematic view of the three-position three-way electromagnetic valve of the utility model, wherein: (a) is the always-on state schematic view of the air path communication of the air pump and the air bag; (b) is the state schematic view of the air path communication of the air bag and the air outlet to exhaust air; (c) is the air path disconnection state schematic view of the air pump and the air bag. DETAILED DESCRIPTION

[0022] The utility model will be further described in conjunction with the specific embodiment with reference to the drawings, see Figures 1-4 :

[0023] A low-cost seat waist support air bag inflation control device, including seat and the air bag of setting on the seat backrest near the waist, the air bag includes upper air bag 11 and lower air bag 12, the seat is provided with air pump U1, the upper electromagnetic valve U3 of control air pump U1 for the inflation of upper air bag 11, the lower electromagnetic valve U2 of control air pump U1 for the inflation of lower air bag 12 and the first, second, third, fourth waist support switch S1, S2, S3, S4 of control air pump U1 for the four inflation states of upper air bag 11 and lower air bag 12, the first, second, third, fourth waist support switch S1, S2, S3, S4 can be set on the control panel of armrest side, also can be integrated in a circuit board and switch box and be led to the seat cushion through the sheath wire of switch box.

[0024] As the further optimization of the above technical scheme, one end of the first waist support switch S1 is connected with power supply VCC, the other end is connected with air pump U1 through first and second diodes D1 and D2 in parallel, and the other end is connected with lower electromagnetic valve U2; after the first waist support switch S1 is turned on, the first and second diodes D1 and D2 are both turned on, air pump U1 works to inflate upper air bag 11, and lower electromagnetic valve U2 is powered off to disconnect the air path between lower air bag 12 and air pump U1 (see Figure 4 (c)), forming the state of upper air bag 11 inflation and lower air bag 12 not inflation;The two ends of air pump U1 and lower electromagnetic valve U2 are respectively connected with ninth and tenth diodes D9 and D10 in reverse connection.

[0025] As a further optimization of the above technical solution, one end of the second waist support switch S2 is connected to the power supply VCC, the other end is connected to the third and fourth diodes D3 and D4 in parallel, and then one way is connected to the air pump U1, and the other way is connected to the upper electromagnetic valve U3; after the second waist support switch S2 is turned on, the third and fourth diodes D3 and D4 are turned on, and the air pump U1 works to inflate the lower air bag 12. The upper electromagnetic valve U3 is powered off to disconnect the air path between the lower air bag 12 and the air pump U1 (see Figure 4 (c), forming the state of the lower air bag 12 being inflated and the upper air bag 11 not being inflated; the two ends of the upper electromagnetic valve U3 are connected in parallel with the eighth diode D8 connected in reverse.

[0026] As a further optimization of the above technical solution, one end of the third waist support switch S3 is connected to the power supply VCC, and the other end is connected to the fifth diode D5 and then connected to the air pump U1; after the third waist support switch S3 is turned on, the fifth diode D5 is turned on, and the air pump U1 works to inflate the upper and lower air bags 11 and 12 (see Figure 4 (a), forming the state of the upper and lower air bags 12 being inflated.

[0027] As a further optimization of the above technical solution, one end of the fourth waist support switch S4 is connected to the power supply VCC, and the other end is connected to the sixth and seventh diodes D6 and D7 in parallel, respectively, and then one way is connected to the upper electromagnetic valve U3 and the other way is connected to the lower electromagnetic valve U2; after the fourth waist support switch S4 is turned on, the sixth and seventh diodes D6 and D7 are turned on, and the upper and lower electromagnetic valves U3 and U2 are powered on to control the upper and lower air bags 12 to be exhausted, forming the state of the upper and lower air bags 12 being exhausted (see Figure 4 (b).

[0028] As a further optimization of the above technical solution, the front surface of the seat back near the waist is fixed with a soundproof and shock-absorbing felt board 13, and the upper and lower air bags 11 and 12 are fixed on the felt board 13 by plastic buckles 10.

[0029] As a further optimization of the above technical solution, the air pump U1 and the upper and lower electromagnetic valves U3 and U2 are arranged in a soundproof felt bag 15, the air inlets of the upper and lower electromagnetic valves U3 and U2 are communicated with the air outlet of the air pump U1 through soft conduits 16, the air outlets of the upper and lower electromagnetic valves U3 and U2 are respectively communicated with the inner cavities of the upper and lower air bags 12 through soft conduits 16, and the exhaust ports of the upper and lower electromagnetic valves U3 and U2 are communicated with the atmosphere.

[0030] As a further optimization of the above technical solution, the first, second, third, and fourth waist support switches S1, S2, S3, and S4 are all button switches or key switches.

[0031] As further optimization of the above technical solutions, the upper and lower electromagnetic valves U3 and U2 are both three-position three-way electromagnetic valves; when the three-position three-way electromagnetic valves are not powered, the air outlet of the air pump U1 is communicated with the inner cavity of the air bag (see Figure 4 (a)); after the electromagnet of one side (right side) of the three-position three-way electromagnetic valve is powered, the inner cavity of the air bag is communicated with the air outlet for exhaust (see Figure 4 (b)); after the electromagnet of the other side (left side) of the three-position three-way electromagnetic valve is powered, the air bag is disconnected with the air path of the air pump U1 (see Figure 4 (c)).

[0032] The diodes D1-D10 are all 1BH62 diodes, and the characteristics thereof include that the forward conduction voltage is not a fixed value but varies with current, and the dynamic resistance is affected by direct current.

[0033] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: they can still make simple replacement or modification of the technical solutions or technical features recorded in the foregoing embodiments by similar technology, and these simple replacement or modification do not make the essence of the corresponding technical solutions deviate from the spirit and substance of the technical solutions of the embodiments of the present application, and still within the protection scope of the present application.

Claims

1. A low-cost inflation / deflation control device for a seat lumbar support airbag, comprising a seat and an airbag disposed on the seat back near the lumbar region, characterized in that: The air bag comprises an upper air bag and a lower air bag, and the seat is provided with an air pump, an upper electromagnetic valve for controlling the air pump to inflate and deflate the upper air bag, a lower electromagnetic valve for controlling the air pump to inflate and deflate the lower air bag, and a first, second, third and fourth lumbar support switch for controlling the air pump to inflate and deflate the upper and lower air bags in four states.

2. The low cost air bag inflation and deflation control device for a seat lumbar support according to claim 1, characterized by: One end of the first lumbar support switch is connected to a power supply, and the other end is connected to the air pump through two diodes in parallel. When the first lumbar support switch is turned on, both diodes are turned on, the air pump works to inflate the upper air bag, and the lower electromagnetic valve is powered on to disconnect the air path between the lower air bag and the air pump, thereby forming an upper air bag inflation state and a lower air bag deflation state. The two ends of the air pump and the lower electromagnetic valve are connected to the ninth and tenth diodes in reverse.

3. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1, wherein: One end of the second lumbar support switch is connected to a power supply, and the other end is connected to the air pump through two diodes in parallel. When the second lumbar support switch is turned on, both diodes are turned on, the air pump works to inflate the lower air bag, and the upper electromagnetic valve is powered on to disconnect the air path between the lower air bag and the air pump, thereby forming a lower air bag inflation state and an upper air bag deflation state. The two ends of the upper electromagnetic valve are connected to the eighth diode in reverse.

4. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1, wherein: One end of the third lumbar support switch is connected to a power supply, and the other end is connected to the air pump through a fifth diode. When the third lumbar support switch is turned on, the fifth diode is turned on, the air pump works to inflate the upper and lower air bags, and the upper and lower air bags are inflated simultaneously, thereby forming an upper and lower air bag inflation state.

5. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1 wherein: One end of the fourth lumbar support switch is connected to a power supply, and the other end is connected to the upper electromagnetic valve through a sixth diode and to the lower electromagnetic valve through a seventh diode. When the fourth lumbar support switch is turned on, both diodes are turned on, the upper and lower electromagnetic valves are powered on to control the upper and lower air bags to deflate, thereby forming an upper and lower air bag deflation state.

6. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1 wherein: The front surface of the seat back near the waist is fixed with a soundproof and shock-absorbing felt board, and the upper and lower air bags are fixed to the felt board through plastic buckles.

7. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1 wherein: The air pump and the upper and lower electromagnetic valves are arranged in the soundproof felt bag, the air inlet of the upper and lower electromagnetic valves is communicated with the air outlet of the air pump through a soft conduit, the air outlet of the upper and lower electromagnetic valves is communicated with the inner cavity of the upper and lower air bags through a soft conduit, and the air outlet of the upper and lower electromagnetic valves is communicated with the atmosphere.

8. The low cost air bag inflation and deflation control device for a seat lumbar support of claim 1, wherein: The first, second, third and fourth lumbar support switches are all button switches or key switches.

9. The low cost seat lumbar air bag inflation and deflation control device of claim 1 wherein: The upper and lower electromagnetic valves are all three-position three-way electromagnetic valves. When the three-position three-way electromagnetic valve is not powered on, the air outlet of the air pump is communicated with the inner cavity of the air bag. When the electromagnet on one side of the three-position three-way electromagnetic valve is powered on, the inner cavity of the air bag is communicated with the air outlet to deflate. When the electromagnet on the other side of the three-position three-way electromagnetic valve is powered on, the air path between the air bag and the air pump is disconnected.

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