CN2314820Y - Simple filter mask with breathing valve - Google Patents

Abstract

The utility model relates to a simple filtering type mask with a breathing valve, comprising an inner bracket, an outer bracket, and a filtering layer arranged between the inner and the outer brackets. The lower ends of the inner and the outer brackets are respectively provided with expiratory holes which are corresponding to each other orderly, and the outer side of the lower end of the outer bracket is also provided with an expiratory valve which is composed of a movable valve sheet, a center valve rod, and a valve box, wherein, the expiratory valve can cover all the expiratory holes, the center valve rod is used for driving the valve sheet to be positioned, both ends of the valve box are connected with the outer bracket in a buckling mode, and the valve box is provided with air exhausting holes. The utility model has the advantages of small respiratory resistance, comfortable wearing, and favorable dustproof and poison proof effect.

Description

The simple and easy filter-type respirator of band outlet valve

The utility model relates to a kind of simple and easy filter-type respirator.

Traditional by inside and outside support with the filter-type respirator that the filter course between the support arm constitutes in being sandwiched in defective such as dismounting inconvenience when changing filtering layer in order to overcome, the Chinese patent 95238333.0 that the applicant once was authorized discloses a kind of " simple and easy filter-type respirator ", the interior support arm of this patent connects by the hinge of its both sides vertical edges along the lower end, and the boss that is provided with respectively by inside and outside support upper end and groove is chimeric is integral, make convenient disassembly when changing filtering layer, inside and outside support can not separate again, loses and cause.With the mouth mask that this patented technology is made, peripheral sealing and anti-toxic dust filterability are good, and still, respiratory resistance is big, makes wearer's expiratory dyspnea, uses uncomfortable.

The purpose of this utility model is to overcome the big defective of respiratory resistance that Chinese patent 95238333.0 exists, provide a kind of peripheral sealing and anti-toxic dust filterability good, and the simple and easy filter-type respirator of the little band outlet valve of respiratory resistance, improve mouth mask wearer's breathing condition, it is both convenient, comfortable again that mouth mask is used.

The utility model realizes that the technical scheme of above-mentioned purpose is: on the basis of the inner support, support arm, filtering layer structure and the annexation thereof that keep No. 95238333.0 Chinese patents, have exhaling hole respectively correspondingly at inner support and support arm lower end, set up an outlet valve on the lateral surface of support arm lower end, this outlet valve by one can topped whole exhaling holes movable valve block, center valve rod that makes the valve block location and two ends buckle-type valve cap of being connected the band steam vent on the support arm constitute.

The utility model adopts still that hinge and tongue and groove are chimeric to flexibly connect inside and outside support, and it is convenient to change filter course, not easily separated again losing, sponge of gluing together on the inner support inner peripheral or rubber ring, make the wearer comfortable, increased the mouth mask sealing again, improve dustproof toxic effect fruit.Particularly be provided with outlet valve, reduced expiratory resistance greatly, also reduced the gathering of steam on mouth mask inner filtration layer, it is freely happy to wear breathing.Therefore, the simple and easy filter-type respirator of this band outlet valve is suitable for existing in the industries such as metallurgy, mine, agricultural chemicals and does the use of individual protection instrument under the working environments such as toxic dust, flue gas, acid mist and radioactive radon daughter, bacterium, agricultural chemicals.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a front view of the present utility model.

Fig. 2 looks enlarged drawing for the local vertical profile of A among Fig. 1.

Support arm 1 of the present utility model and inner support 2 all are the male type that can coincide mutually, and its external form should be similar to face's shape of people, be respectively equipped with on support arm 1 and the inner support 2 support bar 14 and 14 of clamping filter course 3 '.Inside and outside support is convenient to open support arm 1 by being positioned at glue the chain 4 and 4 ' flexible connection of their both sides vertical edges along the lower end, changes the filter course 3 that is sandwiched between the inside and outside support, and inside and outside support can not broken away from, and causes losing.On inner support 2 top lateral surfaces, a boss 5 is set, on corresponding support arm 1 top medial surface, opens a groove 6, utilize groove 6 and boss 5 chimeric mutually, inside and outside support is fused, and clamp filter course 3.The vertical edges of support arm 1 both sides along have up and down be used for fixing the frenulum hole 7 and 7 of wearing the belt that mouth mask uses ', inboard whole peripheral gluing unification sponge or rubber ring 8 at inner support 2, both made the wearer comfortable, can prevent toxic dust again, invade in the mouth mask the slit that gas forms when wearing, strengthened protection effect.Simultaneously, have in the lower end of inner support 2 and support arm 1 exhaling hole 9 and 9 ', and the exhaling hole size on the inside and outside support, shape are all identical, and corresponding one by one, exhaling hole has several, can symmetric arrangement, also can be evenly distributed along a circumference.The lateral surface of being close to support arm 1 lower end install one can topped whole exhaling holes movable valve block 11, valve block 11 be circle or oval thin slice, is made by the material with certain intensity and toughness (as: rubber).The center valve rod 10 that is provided with on the support arm 1 passes the center of valve block 11, makes its location.Valve cap 12 of valve block 11 outer covers, the shape of valve cap 12 is identical with valve block 11, and its inside dimension should be more bigger than the external dimensions of valve block 11, and is not interrupted when valve block is swung in valve cap.The outside of valve cap 12 is provided with two contiguous blocks symmetrically, has groove on the contiguous block, and corresponding support arm 1 is provided with projection, valve cap 12 by groove and projection buckle-type be connected on the support arm 1, unload valve cap 12, promptly replaceable valve block 11.Also have on the side of valve cap 12 and the end face several steam vents 13 and 13 '.Valve block 11, center valve rod 10 and valve cap 12 have constituted outlet valve of the present utility model, when the person that wears the mouth mask exhales, the gas of breathing out can through the exhaling hole 9 and 9 on the inside and outside support ', wash valve block 11 open, discharge by the steam vent on the valve cap 12, and when air-breathing, because in the mouth mask is negative pressuren zone, at the atmosphere direct draught, makes valve block 11 be close to support arm, topped fully firmly exhaling hole 9 ' and 9, the toxic dust, the gas that stop in the atmosphere enter in the mouth mask.Therefore, utilize the non-return effect of the outlet valve of the utility model setting, both can reduce respiratory resistance, do not influence the protection effect of mouth mask again.

Claims (1)

1, the simple and easy filter-type respirator of band outlet valve comprises support arm [1], inner support [2] and is sandwiched in filter course [3] between the inside and outside support.Support arm [1] and inner support [2] are by being positioned at the hinge [4 of its two vertical edges along the lower end, 4 '], and by mutual chimeric being integral of the groove [6] on boss [5] on the lateral surface of inner support [2] top and corresponding support arm [1] the top medial surface, support arm [1] both sides vertical edges is along having frenulum hole [7 up and down, 7 '], gummed has a sponge or rubber ring [8] on the inner peripheral of inner support, it is characterized in that inner support [2] and support arm [1] lower end have exhaling hole [9 respectively correspondingly, 9 '], the lateral surface of support arm [1] lower end is provided with by movable valve block [11] that can topped whole exhaling holes, make the outlet valve of the center valve rod [10] of valve block [11] location and valve cap [12] formation that the two ends buckle-type is connected the band steam vent [13,13 '] on the support arm [1].

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