Manual inflatable pneumatic four-way waist support

Abstract

The utility model provides a manual inflatable pneumatic four-way waist support which comprises a reciprocating pump, a one-way valve, a safety valve, a waist support air bag and a short fiber plate, the waist support air bag is composed of an upper air bag and a lower air bag, the upper air bag is arranged on the upper portion, the lower air bag is arranged on the lower portion, the upper air bag and the lower air bag are partially overlapped and fixed on the rectangular short fiber plate, and the short fiber plate is fixed on a seat backrest. The lower air bag and the upper air bag are communicated with a reciprocating pump air channel through one-way valves respectively, and when the reciprocating pump works, air is inflated to the upper air bag and the lower air bag through the one-way valves at the same time so as to support the waist of the human body. The two same air bags are adopted, the supporting feeling is consistent, and the comfort is good; the device can be conveniently integrated in various types of ejection seats at lower cost, can also be mounted on driver seats of coaches, trucks and the like, and has higher popularization value.

Description

Technical Field

[0001] The utility model belongs to the technical field of protection and life-saving, provides support for the pilot's waist and relates to a manually inflatable pneumatic four-way waist support. Background Art

[0002] The installation space of ejection seats in aircraft cabins is very limited. The backrest angle of ejection seats is generally 15° or 19° relative to the vertical direction, and the backrest angle is not adjustable. In long-distance flight tests, passengers experienced varying degrees of pain and discomfort in the buttocks and waist after riding for more than 8 hours.

[0003] With the improvement of fighter performance and the increase of aircraft range, for pilots who are restrained in ejection seats and have limited movement when flying the aircraft, fatigue caused by maneuverable flight and long-term sitting is inevitable, and back pain will also follow. Appropriate lumbar support can reduce the load on the spine and effectively delay fatigue.

[0004] At present, the ejection seats of some domestic aircraft models are equipped with pneumatic four-way lumbar supports. When integrated on the seat, it is necessary to install an air pump behind the seat back for inflation and a control box for voltage conversion and surge suppression. The seat cables also need to be modified and a power plug added. Generally, for ejection seats with a 17° installation angle, there is not enough space between the seat back and the seat electric mechanism to install the control box. The above unfavorable factors limit the promotion of this technology on other models. Moreover, this military electric pneumatic four-way lumbar support is a customized product with high cost, often costing tens of thousands of yuan per set, and has a low cost-performance ratio. Utility Model Content

[0005] Purpose of the utility model: to provide a simple and practical manually inflatable pneumatic four-way lumbar support which does not require power supply or control box.

[0006] Technical solution of the utility model: a manually inflatable pneumatic four-way lumbar support, including a reciprocating pump, a one-way valve, a lumbar support airbag and a short fiber board. The lumbar support airbag is composed of an upper airbag and a lower airbag. The upper airbag is on the upper part and the lower airbag is on the lower part. The upper airbag and the lower airbag are partially overlapped and fixed on the rectangular short fiber board. The short fiber board is fixed on the seat back. The lower airbag and the upper airbag are connected to the reciprocating pump air path through the one-way valve respectively. When the reciprocating pump is working, the gas inflates the upper airbag and the lower airbag at the same time through the one-way valve to support the human waist.

[0007] In the above scheme, the four-way lumbar support also includes a deflation switch, which is a normally closed air valve. When the deflation switch is pressed or opened, the upper airbag and the lower airbag are deflated at the same time.

[0008] In the above scheme, the deflation speed of the upper airbag and the lower airbag varies with the force of pressing the deflation switch or the angle of opening the switch.

[0009] In the above scheme, the four-way lumbar support also includes a safety valve, which is arranged between the reciprocating pump and the lumbar support airbag. When the gas pressure in the lumbar support airbag exceeds the set value of 40KPa to 60KPa, the spring arranged on the safety valve is compressed, and the pressure relief channel opens to stop inflating the lumbar support airbag.

[0010] In the above solution, the one-way valve is arranged between the reciprocating pump and the upper airbag and the lower airbag, so that the reciprocating pump can only inflate the upper airbag and the lower airbag in one direction at the same time.

[0011] In the above solution, the symmetry line of the geometric center line of the upper airbag and the geometric center line of the lower airbag corresponds to the 50% percentile lumbar curve position of the human body to form a support center.

[0012] The utility model has the following advantages and beneficial effects: no power supply is required, installation is convenient, and space is small; two identical air bags are used, support is consistent, and comfort is good; it can be easily integrated into various types of ejection seats at a relatively low cost, and can also be installed on driver seats of long-distance buses, large trucks, etc., and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the working principle diagram of the gas circuit of the utility model;

[0014] Figure 2 It is the structure and support principle diagram of the utility model.

[0015] In the figure, 1 is a reciprocating pump, 2 is a one-way valve, 3 is a deflation switch, 4 is a safety valve, 5 is an upper air bag, 6 is a lower air bag, and 7 is a staple board. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below through specific implementation modes:

[0017] A manually inflatable pneumatic four-way lumbar support comprises a reciprocating pump 1, a one-way valve 2, a deflation switch 3, a safety valve 4, an upper air bag 5 and a lower air bag 6, and each component is connected by a TPU hose.

[0018] Furthermore, the reciprocating pump 1 is an air source, and a foot-operated or hand-operated air pump or other equipment can be used to inflate the airbag.

[0019] Furthermore, the lumbar support airbag is composed of an upper airbag 5 and a lower airbag 6, the upper airbag 5 is on the upper side and the lower airbag 6 is on the lower side, the upper airbag 5 and the lower airbag 6 are partially overlapped and fixed on a rectangular short fiber board 7, and the two airbags are connected to the air path of the reciprocating pump 1 through a one-way valve 2 respectively.

[0020] Furthermore, the one-way valve 2 is to ensure that the reciprocating pump 1 inflates the airbag, while the air in the airbag does not flow out in the reverse direction;

[0021] Furthermore, the deflation switch 3 is a normally closed air valve. When the switch is pressed or opened, a deflation port is formed. The size of the deflation port can change with the pressing force or the angle of opening the switch, so that slow deflation and fast deflation can be achieved.

[0022] Furthermore, the safety valve 4 is a pressure relief valve. When the gas pressure in the airbag exceeds the set value of 40KPa to 60KPa, the spring of the safety valve is compressed, the pressure relief channel is opened, and the airbag cannot be further inflated, which can effectively protect the airbag from being inflated and exploded.

[0023] Furthermore, the upper airbag 5 and the lower airbag 6 are formed by pressing together TPU composite nylon materials, and can withstand a pressure of more than 200 KPa without leaking;

[0024] The working principle of the technical solution of the utility model is as follows: the upper airbag 5 and the lower airbag 6 are fixed on the staple board 7, and fixed to the seat back through the staple board. In the uninflated state, in the horizontal direction, the symmetry line of the geometric center line of the upper airbag 5 and the geometric center line of the lower airbag 6 is called the support center, which corresponds to the 50% percentile lumbar curve position of the human body. Figure 2 As shown, because the upper airbag 5 is on the upper side and the lower airbag 6 is on the lower side, the upper airbag 5 and the lower airbag 6 partially overlap in the up and down directions. When the reciprocating pump 1 is working, the gas inflates the upper airbag 5 and the lower airbag 6 simultaneously through the one-way valve 2; the greater the inflation amount, the closer the support center position is to the upper side and the support height is higher, until the height and support position are adjusted to the occupant's own comfort level; when the deflation switch 3 is pressed, the upper airbag 5 and the lower airbag 6 are deflated simultaneously, the pressure is reduced, the height is lowered, and deflation is achieved.

[0025] The above technical solutions are only preferred embodiments of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made within the scope of the patent of the present application still fall within the protection scope of the present application.

Claims

1. A manually inflatable pneumatic four-way lumbar support, comprising a reciprocating pump (1), a one-way valve (2), a lumbar support airbag and a staple board (7), characterized in that: The lumbar support airbag is composed of an upper airbag (5) and a lower airbag (6), wherein the upper airbag (5) is on the upper side and the lower airbag (6) is on the lower side. The upper airbag (5) and the lower airbag (6) are partially overlapped and fixed on a rectangular short fiber board (7), and the short fiber board (7) is fixed on the seat back. The lower airbag (6) and the upper airbag (5) are respectively connected to the air path of the reciprocating pump (1) through a one-way valve (2). When the reciprocating pump (1) is working, gas passes through the one-way valve (2) to inflate the upper airbag (5) and the lower airbag (6) at the same time, thereby forming support for the human waist.

2. A manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The four-way lumbar support further comprises a deflation switch (3), which is a normally closed air valve. When the deflation switch (3) is pressed or opened, the upper air bag (5) and the lower air bag (6) are deflated simultaneously.

3. A manually inflatable pneumatic four-way lumbar support according to claim 2, characterized in that: The deflation speed of the upper airbag (5) and the lower airbag (6) changes with the force of pressing the deflation switch (3).

4. A manually inflatable pneumatic four-way lumbar support according to claim 2, characterized in that: The deflation speed of the upper airbag (5) and the lower airbag (6) changes with the angle at which the switch is opened.

5. The manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The four-way lumbar support further comprises a safety valve (4), which is arranged between the reciprocating pump (1) and the lumbar support airbag. When the gas pressure in the lumbar support airbag exceeds a set value of 40 KPa to 60 KPa, the spring arranged on the safety valve (4) is compressed, and the pressure relief channel is opened to stop inflating the lumbar support airbag.

6. A manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The reciprocating pump (1) is a foot-operated or hand-operated air pump.

7. A manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The four-way lumbar support also includes a hose, which is made of TPU material.

8. The manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The one-way valve (2) is arranged between the reciprocating pump (1) and the upper airbag (5) and the lower airbag (6), so that the reciprocating pump (1) can only inflate the upper airbag (5) and the lower airbag (6) in one direction at the same time.

9. The manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The upper airbag (5) and the lower airbag (6) are formed by pressing together a TPU composite nylon material.

10. The manually inflatable pneumatic four-way lumbar support according to claim 1, characterized in that: The symmetry line of the geometric center line of the upper airbag (5) and the geometric center line of the lower airbag (6) corresponds to the 50% percentile lumbar curve position of the human body to form a support center.

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