WO2008037136A1

WO2008037136A1 - A device for inflating air and releasing air

Info

Publication number: WO2008037136A1
Application number: PCT/CN2006/003642
Authority: WO
Inventors: Xiaobo Chen
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-28
Filing date: 2006-12-28
Publication date: 2008-04-03
Anticipated expiration: 2009-03-28
Also published as: CN100410545C; CN1928419A

Abstract

A device for inflating air and releasing air includes a pump seat (4), a panel (3), a pump and a knob (9). An air hole (41) is located on the pump seat (4), and the pump connects with a valve. The valve includes an airway switcher (11), a sleeve (12), upside and downside valve plates (14, 15), and a sealing pad (16). A spring (13) is placed between the upside valve plate (14) and the airway switcher. Two air chambers (23) are located in the airway switcher (11), the air chambers are communicated with the room in the pump and the outside via airholes respectively. The device has simple structure, improves the sealing property, and reduces probability of leakage.

Description

充放气装置技术领域 Charge and venting device

本发明涉及一种用于充气物上的充气装置，尤其是一种既可充气又可放气的充放气装置。背景技术 The present invention relates to an inflator for use on an inflator, and more particularly to a charge and discharge device that is both inflatable and deflated. Background technique

目前巿场上有许多充气产品，充气产品在充满气的状态下因体积膨胀可以实现其应有的功能，在放完气的状态下可便于折叠收藏或外出携带。与充气产品配套的充放气装置包括打气筒、电动泵以及内置的气泵，单独的打气简、电动泵都是人工进行充放气外置使用的，费时费力，携带不便，操作麻烦，逐步被内置的气泵所取代。现有的内置的气泵往往只能对充气产品充气, 而放气仍需人工搡作，十分不便；部分内置的气泵通过多气道转换及其它种种复杂的结构实现了既可充气又可放气的功能, 气密效果差, 容易出现故障，为顾客的使用带来诸多不便; 而且大部分釆用加软体密封片的弹性密封结构, 采用此种结构密封片易发生变形、受温度影响易软化、时间长易老化，导致气密性差，降低了产品的使用寿命。发明内容 At present, there are many inflatable products on the market. The inflatable products can realize their proper functions due to the volume expansion in the state of full gas, and can be easily folded or carried out when the gas is exhausted. The charging and discharging device matched with the inflatable product includes an air pump, an electric pump and a built-in air pump. The separate air pumping and electric pump are manually used for external charging and discharging, which is time-consuming and laborious, inconvenient to carry, troublesome to operate, and gradually Replaced by a built-in air pump. The existing built-in air pump can only inflate the inflated product, and the deflation still needs manual operation, which is very inconvenient; some built-in air pumps are both inflatable and deflated through multi-airway conversion and other complicated structures. The function is poor in airtightness, easy to malfunction, and brings inconvenience to the customer's use; and most of them use the elastic sealing structure of the soft sealing piece, which is easy to be deformed by the structure, and is easily softened by temperature. Long time and easy aging, resulting in poor air tightness and reduced product life. Summary of the invention

(一）要解决的技术问题 . (1) Technical problems to be solved.

本发明的目的是针对现有技术的不足，提供一种既可充气又可放气且方便快捷、省时省力、密封性好的内置式的充放气装置。 SUMMARY OF THE INVENTION The object of the present invention is to provide a built-in charging and discharging device which is both inflatable and deflated, which is quick and easy to use, saves time and effort, and has good sealing performance.

(二）技术方案 (2) Technical plan

.为实现上述目的，本发明釆用如下技术方案: In order to achieve the above object, the present invention uses the following technical solutions:

本发明的充放气装置, 包括中空的气泵座、固定在气泵座上面的面板、安装在气泵座内具有气室的气泵、设置在面板上的中央位置开孔的旋钮，其中所述气泵座上设有气孔, 所述气泵上连接一气阀，气阀包括气道转换体、套在气道转换体外的套筒以及固定在气孔内的上阀门片、下阀门片、密封垫, 所述上闽门片开有缺口，上阀门片与气道转换体之间连接有弹簧，使上阀门片与下阀门片贴合在一起，下阀门片上有气孔，上阀门片上的缺口与下阀门片的气孔可形成气体通道气阀, 上阀门片与下阀门片釆用硬质材料, 上阀门片能上下移动地固定在气道转换体上，从而使气道转换体与上闽门片同步旋转，气道转换体内有两个相互隔开的气室，气室通过气孔与气泵、气泵座内空间及外界气体相通。 The charging and discharging device of the present invention comprises a hollow air pump seat, a panel fixed on the air pump seat, an air pump having a gas chamber installed in the air pump seat, and a knob disposed at a central position of the panel, wherein the air pump seat a gas hole is arranged on the air pump, and the air valve comprises an air valve conversion body, a sleeve sleeved outside the air passage conversion body, and an upper valve piece, a lower valve piece and a sealing pad fixed in the air hole, wherein the air valve The flap has a notch, and a spring is connected between the upper valve piece and the air passage conversion body to make the upper valve The sheet is attached to the lower valve piece, and the lower valve piece has air holes. The notch on the upper valve piece and the air hole of the lower valve piece can form a gas passage air valve, and the upper valve piece and the lower valve piece are made of a hard material, and the upper valve piece is used. It can be fixed up and down on the airway conversion body, so that the airway conversion body and the upper door piece rotate synchronously. The airway conversion body has two mutually separated air chambers, and the air chamber passes through the air hole and the air pump and the air pump seat. Space and outside air are connected.

其中, 所述气道转换体的纵截面呈 "Z" 型，气道转换体侧面开有控制外界气体与充气体内部气体导通的两个气孔, 所述套简侧面有设有气孔，套简的其中一个气孔与气泵座内部空间相通，另一个气孔与气泵的出气口连接在一起；气泵的气室侧面有与套筒的一个气孔相连接的出气口、 .气室的下部设有与气泵座内部空'间相通的进气口。 Wherein, the longitudinal section of the airway conversion body is in a "Z" shape, and the air passage conversion body has two air holes for controlling the conduction of the outside air with the gas inside the inflatable body, and the sleeve has a vent hole on the side of the sleeve. One of the air holes of the simple air is connected to the inner space of the air pump seat, and the other air hole is connected with the air outlet of the air pump; the air chamber side of the air pump has an air outlet connected to one air hole of the sleeve, and the lower part of the air chamber is provided with The air pump seat has an air inlet that communicates with each other.

所述的上阀门片、下阀门片由陶瓷材料制成。 The upper valve piece and the lower valve piece are made of a ceramic material.

所述的气泵包括气室盖、风叶、气室、马达和密封圈，马达固定在气室的下部，风叶固定在马达的转轴上，气室盖固定在气室的上部，从而使气室形成一个独立气室。 The air pump comprises a gas chamber cover, a fan blade, a gas chamber, a motor and a sealing ring, the motor is fixed at a lower part of the air chamber, the wind blade is fixed on a rotating shaft of the motor, and the gas chamber cover is fixed at an upper part of the air chamber, thereby making the gas The chamber forms an independent air chamber.

所述面板上有用于上下连接的固定架，上部连接所述旋钮，下部连接到气道转换体上，固定架与气道转换体之间设有密封垫和弹簧。 The panel has a fixing bracket for connecting the upper and lower sides, the upper portion is connected to the knob, and the lower portion is connected to the air passage converting body, and a sealing pad and a spring are disposed between the fixing frame and the air passage converting body.

所述气泵座内设有电源线盒。 A power cord box is disposed in the air pump seat.

(三）有益效果 (3) Beneficial effects

本发明的充放气装置的优点和积极效果在于：本发明中，充、放气在同一气道内实现，充、放气的转换与充气泵打开与关闭同步, 大大简化了该充放气装置的结构与体积；上阀门片与下阀门片釆用硬质材料的平面密封结构，增强了该装置的气密性，硬度高，耐磨损，耐老化，受温度影响小，大大提高了使用寿命，降低'了其出现故障及出现漏气的机率；本发明以电动放气方式取代人工放气方式，可将充气产品内的气体完全排放干净, 操作简单，既省时又省力，充放气过程快捷方便，适合多种产品和场合使用。附图说明 The advantages and positive effects of the charging and discharging device of the present invention are as follows: In the present invention, charging and discharging are realized in the same airway, and the switching of charging and discharging is synchronized with opening and closing of the air pump, which greatly simplifies the charging and discharging device. Structure and volume; The flat sealing structure of the upper valve piece and the lower valve piece with hard material enhances the airtightness of the device, high hardness, wear resistance, aging resistance, small temperature influence, greatly improved use The service life reduces the probability of failure and air leakage. The invention replaces the artificial deflation method with the electric deflation method, and can completely discharge the gas in the inflatable product, and the operation is simple, saving time and labor, charging and discharging The gas process is quick and convenient, suitable for a variety of products and occasions. DRAWINGS

图 1为发明充放气装置的立体图； ' 图 2为本发明充放气装置的结构分解示意图； Figure 1 is a perspective view of the charging and discharging device of the invention; 2 is a schematic exploded view of the charging and discharging device of the present invention;

图 3为本发明充放气装置在充气状态时的结构示意图； 3 is a schematic structural view of the charging and discharging device of the present invention in an inflated state;

图 4为本发明充放气装置在充气状态时的立体图； Figure 4 is a perspective view of the charging and deflation device of the present invention in an inflated state;

图 5为本发明充放气装置在密封状态时的结构图； Figure 5 is a structural view of the charging and discharging device of the present invention in a sealed state;

图 6为本发明充放气装置在密封状态时的立体图； Figure 6 is a perspective view of the charging and discharging device of the present invention in a sealed state;

图 7为本发明充放气装置在放气状态时的结构图； Figure 7 is a structural view of the charging and discharging device of the present invention in a deflated state;

图 8为本发明充放气装置在放气状态时的立体图； Figure 8 is a perspective view of the charging and discharging device of the present invention in a deflated state;

图中： 3. 面板； 4.气泵座； 5. 弹簧； 6. 密封垫； 7. 马达控制开关； 8. 固定架； 9. 旋钮； 10. 电线盖； 11. 气道转换体； 12. 套简； 13. 弹簧； 14. 上阀门片； 15. 下阀门片；. 16. ·密封垫；，21. 气室盖； 22. 风叶； 23. 气室； 24. 马达； 25. 密封圈； 31. 开口； 41.气孔; 42. 电线盒； 111、 112、 121、 122 气孔； 211.出气口； 212.进气口。具体实施方式 In the figure: 3. Panel; 4. Air pump seat; 5. Spring; 6. Seal; 7. Motor control switch; 8. Fixing frame; 9. Knob; 10. Wire cover; 11. Air passage conversion body; Sleeve; 13. spring; 14. upper valve piece; 15. lower valve piece; 16. 16. sealing pad; , 21. air chamber cover; 22. fan blade; 23. air chamber; 24. motor; 31; opening; 41. air hole; 42. wire box; 111, 112, 121, 122 air hole; 211. air outlet; 212. air inlet. detailed description

• 下面结合附图，进一步详细说明本发明充放气装置的其中一种具体实施方式, 但不用来限制本发明的保护范围。 One of the specific embodiments of the charge and discharge device of the present invention will be further described in detail below with reference to the accompanying drawings, but is not intended to limit the scope of the present invention.

如图 1、图 2所示，本发明的充放气装置，包括气泵、气泵座 4、面板 3，其特征在于：气泵上连接一气阀，气阀由气道转换体 11、套筒 12、弹簧 13、上阀门片 14、下阀门片 15、密封垫 16组成，气道转换体 11呈 "Z" 型结构，上阀门片 14、下阀门片 15、密封垫 16固定在气泵座 4的气孔 41内，所述的上阀门片 14上部装有一弹簧 13与气道转换体 11连接，上阀门片 14开有缺口，下部与下阀门片 15贴合在一起，下阀门片 15上有气孔，旋转上阀门片 14, 上阀门片 14上的缺口与下闹门片 15的气孔可形成气体通道，上阀门片 14与下阀门片 15采用硬质材料陶瓷，从而实现上阀门片 14、下阀门片 15的平面密封；气道转换体 11侧面开有控制外界气体与充气体内部气体导通的气孔 111、气孔 112，而气道转换体 11外部有一套简 12,套简 12侧面有气孔 121、气孔 122, 气孔 121与泵体座内部空间相通，气孔 122与气泵的出气口连接在一起。气泵由气室盖 21、风叶 22、气室 23、马达 24、密封圈 25组成，马达 24固定在气室 23的下部，马达的转轴与风叶 22相连接，气室盖 21固定在气室 23的上部，形成一个独立气室，通螺丝固定在泵体座的内部空间中，侧面开有出气口 211、下部开有与泵体座内部空间相通的进气口 212，气阀的一个气孔 122与气泵出气口 211相通, 另一气孔 121与气泵座内空间相通; 气泵的进气口 212与气泵座 4内空间相通，上阀门片 14固定在气道转换体 11 的底端部，故气阀的气道转换体 11与上阀门片 14同步旋转，实现充气体的充气与放气。 . As shown in FIG. 1 and FIG. 2, the charging and discharging device of the present invention comprises an air pump, a pump base 4 and a panel 3, wherein: a gas valve is connected to the air pump, and the air valve is composed of an air passage conversion body 11 and a sleeve 12, The spring 13, the upper valve piece 14, the lower valve piece 15, and the sealing ring 16 are formed. The air passage converting body 11 has a "Z" type structure, and the upper valve piece 14, the lower valve piece 15, and the sealing pad 16 are fixed to the air holes of the air pump base 4. 41, the upper part of the upper valve piece 14 is mounted with a spring 13 connected to the air passage conversion body 11, the upper valve piece 14 is notched, the lower part is attached to the lower valve piece 15, and the lower valve piece 15 has air holes. Rotating the upper valve piece 14, the gap on the upper valve piece 14 and the air hole of the lower door piece 15 can form a gas passage, and the upper valve piece 14 and the lower valve piece 15 are made of a hard material ceramic, thereby realizing the upper valve piece 14 and the lower valve. The flat surface of the sheet 15 is sealed; the side of the air passage converting body 11 is provided with air holes 111 and air holes 112 for controlling the gas between the outside air and the inside of the inflator, and the air passage converting body 11 has a set of simple 12 on the outside, and the side of the sleeve 12 has a hole 121. , the air hole 122, the air hole 121 is connected to the inner space of the pump body seat The air hole 122 is connected to the air outlet of the air pump. The air pump is composed of a gas chamber cover 21, a fan blade 22, a gas chamber 23, a motor 24, and a seal ring 25, a motor 24 is fixed in the lower part of the air chamber 23, the rotating shaft of the motor is connected with the fan blade 22, and the air chamber cover 21 is fixed on the upper part of the air chamber 23 to form an independent air chamber, which is fixed in the inner space of the pump body seat by screws. An air outlet 211 is opened, and an air inlet 212 communicating with an inner space of the pump body seat is opened in the lower part. One air hole 122 of the air valve communicates with the air pump air outlet 211, and the other air hole 121 communicates with the air pump seat space. The port 212 communicates with the inner space of the air pump base 4, and the upper valve piece 14 is fixed to the bottom end portion of the air passage converting body 11, so that the air passage converting body 11 of the air valve rotates synchronously with the upper valve piece 14 to realize inflation and release of the inflatable body. gas. .

本发明面板 3上设开口 31, 通过螺丝固定在泵体座 4上。面板 3上有用于上、下连接的阶梯简状固定架 8, 上部连接一中央位置开孔的旋钮 9, 下部连接到气道转换体 11 ,固定架 8与气道转换体 11之间设有密封垫 6和弹簧 5。泵体座 4上设有一个与充气体相通的出气孔 41和电线盒 42, 出气孔 41为圆形，上部与气阀连接在一起，电源盒 42用于储藏电源线，其上部有一个电线盖 10。 The panel 3 of the present invention is provided with an opening 31 which is fixed to the pump body seat 4 by screws. The panel 3 has a stepped fixing frame 8 for upper and lower connection, a knob 9 connected to a central position opening at the upper portion, a lower portion connected to the air passage converting body 11, and a fixing frame 8 and the air passage converting body 11 Seal 6 and spring 5. The pump body 4 is provided with an air outlet 41 and a wire box 42 communicating with the inflator. The air outlet 41 is circular, and the upper portion is connected with the air valve. The power box 42 is used for storing the power cable, and the upper portion has a wire. Cover 10.

如图 3、图 4所示，本发明的充放气装置对充气体充气时，使用者打开马达控制开关 Ί启动马达 24和风叶 22，外界空气通过中空的旋钮 9、固定架 8、气孔' 111、气孔' 121 , 流入到泵体座 4内部空间；泵体座 4的内部空间充满气体，气体在马达及风叶的工作状态下, 从气室 23下部的进气口 212进入到气室内部，经出气口 211和气阀的气孔 112、上阀门片 14与下阀门片 15之间形成的气道流入充气物体内部。 As shown in FIG. 3 and FIG. 4, when the charging and discharging device of the present invention inflates the inflator, the user opens the motor control switch, activates the motor 24 and the blade 22, and the outside air passes through the hollow knob 9, the fixing frame 8, and the air hole ' 111, the air hole '121, flows into the inner space of the pump body seat 4; the inner space of the pump body seat 4 is filled with gas, and the gas enters the air chamber from the air inlet 212 at the lower part of the air chamber 23 under the working state of the motor and the fan blade Internally, the air passage formed between the air outlet 211 and the air valve 112 of the air valve, the upper valve piece 14 and the lower valve piece 15 flows into the interior of the inflatable object.

如图 5、图 6所示，本发明的充放气装置关闭时，使用者旋转旋钮 9, 马达控制开关 7关闭，马达 24和风叶 .22停止工作，旋钮 9与固定架 8带动 '气道转换体 11转动，使气道转换体上两侧的气孔 111、气孔 112与套简 12两侧气孔 121、气孔 122, 错开布置，从而使通道处于截止状态，气道转换体 11 转动的同时，带动上阀门片 14转动，使两个阀门片上的气道处于封闭状态，对充气体起到密封作用。 As shown in FIG. 5 and FIG. 6, when the charging and discharging device of the present invention is closed, the user rotates the knob 9, the motor control switch 7 is closed, the motor 24 and the blade 22 are stopped, and the knob 9 and the fixed frame 8 drive the airway. The conversion body 11 is rotated, so that the air holes 111, the air holes 112 on both sides of the air passage conversion body and the air holes 121 and the air holes 122 on both sides of the sleeve 12 are staggered, so that the passage is in an off state, and the air passage conversion body 11 rotates. The upper valve piece 14 is driven to rotate, so that the air passages on the two valve pieces are in a closed state, and the inflatable body is sealed.

如图 7、图 8所示，本发明的充放气装置在对充气体放气时，使用者旋转旋钮 9, 旋钮 9与固定架 8带动气道转换体 11转动，使气道转换体的气孔 111与套简 12的气孔 122导通，气孔 112与气孔 121导通，同时上阀门片 14 转动，使两阀门片的气道导通；马达控制开关 7启动马达 24和风叶 22, 气体从充气体内经泵体座 4的气孔 41、下阀门片 14、上阀门片 15、气孔 112, 气孔 121流入泵体座 4内部空间，气体再经由气室 23下部的进气口 212进入气室内部，经出气口 211、气孔 122、气孔 111、固定架 8、旋钮 9放出外界。 As shown in FIG. 7 and FIG. 8, when the charging and discharging device of the present invention deflates the inflator, the user rotates the knob 9, and the knob 9 and the fixing frame 8 drive the air passage converting body 11 to rotate, so that the air passage converting body Stomata 111 is electrically connected to the air hole 122 of the sleeve 12, the air hole 112 is electrically connected to the air hole 121, and the upper valve piece 14 is rotated to make the air passages of the two valve pieces conductive; the motor control switch 7 activates the motor 24 and the fan blade 22, and the gas is inflated. The air hole 41, the lower valve piece 14, the upper valve piece 15, and the air hole 112 of the pump body seat 4 flow into the inner space of the pump body seat 4, and the gas enters the air chamber through the air inlet 212 of the lower part of the air chamber 23, The air outlet 211, the air hole 122, the air hole 111, the fixing frame 8, and the knob 9 are discharged to the outside.

本发明在气泵座 4内设有电源线盒 42,可以用于储藏接通电源使气泵工作的电源线等，由于电源线内置到气泵座内，携带方便，安全可靠。 The power cable box 42 is provided in the air pump base 4, and can be used for storing a power line for turning on the power source to make the air pump work. Since the power line is built into the air pump seat, it is convenient to carry, safe and reliable.

• 本发明的气泵电源也可采用电池，如蓄电池、干电池等。 • The air pump power supply of the present invention may also employ a battery such as a battery, a dry battery, or the like.

以上为本发明的最佳实施方式，依据本发明公开的内容，本领域的普通技术人员能够显而易见地想到的一些雷同、替代方案，均应落入本发明保护的范围。工业实用性 The above is a preferred embodiment of the present invention, and other similarities and alternatives that are apparent to those skilled in the art in light of the disclosure of the present invention should fall within the scope of the present invention. Industrial applicability

本发明的充放气装置, .适用于各种类的充气物。由于本发明的充、放气过程可在同一气道内实现，大大简化了该充放气装置的结构与体积；同时由于上阀门片与下阀门片采用硬质材料的平面密封结构，从而增强了该装置的气密性，硬度高，耐磨损，耐老化，受温度影响小，大大提高了使用寿命，降低了其出现故障的及出现漏气的机率；本发明以电动放气方式取代人工放气方式，可将充气产品内的气体完全排放干净，操作简单，既省时又省力，充放气过程快捷方便，适合多种产品和场合使用。 The charge and discharge device of the present invention is applicable to various types of inflators. Since the charging and deflation process of the present invention can be realized in the same airway, the structure and volume of the charging and discharging device are greatly simplified; and at the same time, the upper valve piece and the lower valve piece are enhanced by a flat sealing structure of a hard material, thereby enhancing The device has high airtightness, high hardness, wear resistance, aging resistance, small temperature influence, greatly improved service life, and reduced probability of occurrence of malfunction and leakage; the present invention replaces manual labor by electric deflation The venting method can completely discharge the gas in the inflated product, and the operation is simple, which saves time and labor, and the charging and discharging process is quick and convenient, and is suitable for various products and occasions.

Claims

1. A charging and discharging device comprising a hollow air pump seat (4), a panel (3) fixed to the air pump seat (4), a gas pump having a gas chamber (23) installed in the air pump seat (4), and a setting a knob (9) for opening a hole in a central position on the panel (3), characterized in that: the air pump seat (4) is provided with a air hole (41), and a gas valve is connected to the air pump, and the air valve includes air passage conversion a body (11), a sleeve (12) disposed outside the airway conversion body (11), and an upper valve piece (14), a lower valve piece (15), and a gasket (16) fixed in the air hole (41), The upper valve piece (14) is notched, the upper valve piece (14) and the air passage conversion body

(11) A spring (13) is connected between the upper valve piece (14) and the lower valve piece (15), the lower valve piece (15) has air holes, and the upper valve piece (14) is notched. The gas passage of the lower valve piece (15) can form a gas passage valve, the upper valve piece (14) and the lower valve piece (15) are made of a hard material, and the upper valve piece (14) can be fixed up and down to the air passage conversion body. (11), so that the air passage conversion body (11) and the upper valve piece (14) rotate synchronously, and the air passage conversion body (11) has two mutually separated air chambers, and the air chamber passes through the air hole and the air pump and the air pump The inner space of the seat (4) is connected to the outside air.

2. The charge and discharge device according to claim 1, wherein: the longitudinal section of the air passage conversion body (11) is "Z" type, and the air passage conversion body (11) is provided with a control surface gas and an inflatable body. Two air holes (111, 112) in which the internal gas is turned on, and the air holes (121, 122) are arranged on the side of the sleeve (12), and one of the air holes (121) of the sleeve (12) is connected to the internal space of the air pump base. The other air hole (122) is connected with the air outlet (211) of the air pump; the air chamber (23) side of the air pump has an air outlet (211) connected to a air hole (122) of the sleeve (12), and the gas The lower part of the chamber (23) is provided with an air inlet (212) communicating with the inner space of the air pump seat.

3. The charge and discharge device according to claim 1 or 2, wherein the upper valve piece (14) and the lower valve piece (15) are made of a ceramic material.

4. The charge and discharge device according to claim 1 or 2, wherein: the air pump comprises a gas chamber cover (21), a fan blade (22), a gas chamber (23), a motor (24), and Seal (25), motor

(24) fixed in the lower part of the air chamber (23), the vane (22) is fixed on the rotating shaft of the motor, and the air chamber cover (21) is fixed on the upper part of the air chamber (23), so that the air chamber (23) forms a Independent air chamber.

The charging and deflation device according to claim 1 or 2, characterized in that: the panel (3) There is a fixing frame (8) for connecting the upper and lower sides, the upper portion is connected to the knob (9), the lower portion is connected to the air passage converting body (11), and the sealing frame (8) is sealed with the air passage converting body (11). Pad (6) and spring (5). '

The charge and discharge device according to claim 1 or 2, characterized in that the gas pump seat (4) is provided with a power cord box (42). ·