CN107754111B - Inverse parabola shape inverse folding edge structure of gas mask sealing frame - Google Patents
Inverse parabola shape inverse folding edge structure of gas mask sealing frame Download PDFInfo
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- CN107754111B CN107754111B CN201711084090.7A CN201711084090A CN107754111B CN 107754111 B CN107754111 B CN 107754111B CN 201711084090 A CN201711084090 A CN 201711084090A CN 107754111 B CN107754111 B CN 107754111B
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- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 210000001061 forehead Anatomy 0.000 claims abstract description 15
- 230000007704 transition Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses an inverse parabola-shaped reverse-folding edge structure of a sealing frame of a gas mask, and the sealing frameThe reverse folding edge is composed of a forehead part (1), a temple part (2), a cheek part (3) and a lower jaw part (4) which are symmetrical left and right; the forehead part is concave inverse parabola shape, and its cross-sectional shape is represented as y =0.05x2-3.3x + 45; the temple region is concave and inverse parabolic, and its cross-sectional shape is y =0.014x2-2x + 39; cheek region is concave inverse parabolic, and its cross-sectional shape is represented by y =0.015x2-2x + 35; the lower jaw part comprises a lower jaw side part and a lower jaw part; the lateral part of the jaw is linear, the cross-sectional shape of which is expressed as y =0.16x +0.1, and the lateral part of the jaw is concave inverse parabolic, the cross-sectional shape of which is expressed as y =0.024e0.13x. The concave surface in the reverse folding edge structure is directly attached to the face of a person, and the physiological comfort of the wearing person is improved by designing the reverse folding edge structure.
Description
Technical Field
The invention belongs to the field of personal protective masks, and particularly relates to an inverse parabolic inverse-folded edge structure of a sealing frame of a gas mask.
Background
The air tightness is an important technical index of the gas mask, the main part for realizing the index is a sealing frame of the gas mask, the reverse folding edge is an important component of the sealing frame, the design of the part is good and bad, and the success or failure of the design of the gas mask is determined to a great extent. After decades of development of gas masks in China, the formed reverse-folded edge section structure mainly comprises: the general reverse-flanging section forms at present are linear and inward convex parabolic structures after market inspection and elimination. The linear reverse-folded edge is easy to mold and convenient for batch production, but has poor air tightness; the inward convex parabolic reverse hem has inward convex structure in the contact part with human face, and has parabolic cross section and convex end contacting with human face.
The section of the proposed inverse parabolic inverse hem structure is also parabolic, but the concave surface of the parabola is contacted with the human face during design.
Disclosure of Invention
The invention aims to provide a novel inverse parabolic inverse-folded edge structure of a gas mask sealing frame, which improves the wearing comfort of a mask on the basis of ensuring the protective performance by designing the inverse parabolic inverse-folded edge structure, so that a wearer can greatly relieve the pain feeling under the condition of wearing the mask for a long time, and simultaneously provides a sealing mode of an inverse folded edge and a human face on the basis, namely, the sealing mode is changed from the inward convex parabolic linear sealing to the inverse parabolic surface sealing, thereby not only ensuring the effective protection factor, but also improving the wearing comfort.
The invention is realized by adopting the following technical scheme:
the reverse parabolic reverse folding edge structure for sealing frame of gas mask consists of forehead, temple, cheek and chin in left-right symmetry.
The forehead part is concave inverse parabola-shaped, and the cross section of the forehead part is expressed as y =0.05x2-3.3x+45。
The temple part is concave inverse parabola-shaped, and the cross-sectional shape of the temple part is expressed as y =0.014x2-2x+39。
The cheek region is concave inverse parabolic, and the cross-sectional shape is y =0.015x2-2x+35。
The lower jaw part comprises a lower jaw side part and a lower jaw part; the chin side is linear with a cross-sectional shape of y =0.16x +0.1, and the chin is concave with an inverse parabolic shape with a cross-sectional shape of y =0.024e0.13x。
The invention provides a reverse parabolic reverse folding edge structure for the first time, the shape of the cross section of the reverse parabolic reverse folding edge structure is a parabolic concave cross section, compared with linear and parabolic inward convex reverse folding edge cross section structures, the contact area of a reverse folding edge and a human face is increased, meanwhile, the airtight mode of the reverse folding edge and the human face is changed from an inward convex linear sealing structure to a concave surface sealing mode, the wearing comfort degree of a person wearing the mask is greatly improved, and meanwhile, the integral protection factor of the mask is improved. In the actual product test, the wearing comfort of the mask is obviously superior to that of the traditional mask with a linear and inward convex reverse-folded edge structure by questionnaire survey of wearing personnel; according to the laboratory performance evaluation, the protection factor reaches 20000, the protection level reaches the technical requirements specified in GJB1155A-2004 general Specification for Filter gas masks, and compared with the prior art, the protective factor of the gas mask is not reduced, and the wearing comfort after wearing the mask is effectively improved.
Drawings
FIG. 1 is a front view of an inverted parabolic reverse fold configuration of a respirator sealing frame of the present invention.
Fig. 2a shows a schematic cross-sectional view a-a of fig. 1.
FIG. 2b is a schematic cross-sectional view of an inwardly turned flange of a conventional respirator closure frame.
Fig. 3 shows a schematic view of the chin.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
A reverse parabolic reverse-folding edge structure of a gas mask sealing frame is shown in figure 1, and the reverse-folding edge of the sealing frame is composed of a forehead part 1, a temple part 2, a cheek part 3 and a lower jaw part 4 which are bilaterally symmetrical.
The temple portion 2 has an inward concave inverse parabolic shape, and its cross-sectional shape is y =0.014x2The value range of-2 x +39, x is determined according to actual conditions and is usually (10-40).
The chin portion 4 includes a chin side portion and a chin portion. Wherein, the lateral part of the lower jaw is in a linear shape, the cross section shape of the lateral part is expressed as y =0.16x +0.1, and the value range of x is determined according to the actual situation and is usually (0-20); the chin part is concave inverse parabolic, and the cross-sectional shape is expressed as y =0.024e0.13xAnd the value range of x is determined according to actual conditions and is usually (10-40).
The forehead part 1, the temple part 2, the cheek part 3 and the lower jaw part 4 are connected in a smooth transition way to form a whole.
In specific implementation, the design of the reverse-folding front view shown in fig. 1 is composed of four parts, namely a forehead part 1, a temple part 2, a cheek part 3 and a chin part 4, and all parts shown in fig. 2a are concave surfaces which are contacted with a human face; fig. 2b shows a cross-sectional view of a conventional inwardly flanged reverse flange.
In the invention, the forehead part 1 is an integral curved surface, the curved surface of the part has good transition, and the slope of a parabola tangent line at the part is larger in design, so that the forehead part can form surface sealing; the temple part 2 is designed into a linear section or a parabolic inward convex section because the temple of a human body is concave inwards and the concave degree is inconsistent, but the slope of the tangent line of a parabola is larger, and the design of the temple part is in a reverse parabola shape, so that an airtight binding surface is favorably formed; the cheek part 3 has more muscles, the parabolic inward convex section in the prior structure is easy to cause the extrusion of the cheek muscles, and the part is worn with pressure pain for a long time, so the part is designed to be a parabolic inward concave section; the chin part has an inward convex structure, so that the section of the part is also a parabolic concave section.
The invention provides a reverse-folded edge structure with high fitting property with the face of a wearer, wherein a reverse folded edge is an important component of a sealing frame of a gas mask, an inner concave surface of the reverse-folded edge structure is directly fitted with the face of the wearer, and the physiological comfort of the wearer is improved by designing the reverse-folded edge structure.
Compared with linear and parabolic inward convex type reverse-folded cross section structures, the reverse-folded edge structure provided by the invention increases the contact area of the reverse folded edge and the face, and simultaneously changes the airtight mode of the reverse folded edge and the face from an inward convex linear sealing structure to an inward concave surface sealing mode, so that the wearing comfort degree of a person wearing the mask is greatly improved, and the integral protection factor of the mask is improved.
In the actual product test, the wearing comfort of the mask is obviously superior to that of the traditional mask with a linear and inward convex reverse-folded edge structure by questionnaire survey of wearing personnel; through the evaluation of laboratory performance, the protection factor reaches 20000, the protection level reaches the technical requirements specified in GJB1155A-2004 general Specification for Filter gas masks, and the practical prospect is great.
It should be noted that modifications and applications may occur to those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. The utility model provides a reverse parabola shape of close frame of respirator turns over limit structure which characterized in that: the sealing frame reverse folding edge is composed of a forehead part (1), a temple part (2), a cheek part (3) and a lower jaw part (4) which are symmetrical left and right;
the forehead part (1) is concave inverse parabola-shaped, and the cross section of the forehead part is expressed as y =0.05x2-3.3x +45, wherein x is in the range of 0-15;
the temple part (2) is concave inverse parabolic, and the cross-sectional shape thereof is expressed as y =0.014x2-2x +39, wherein x is in the range of 10-40;
the cheek region (3) is concave inverse parabolic, and the cross-sectional shape thereof is y =0.015x2-2x +35, wherein x is 20-40;
the lower jaw part (4) comprises a lower jaw side part and a lower jaw part; the lateral part of the lower jaw is linear, the cross section of the lateral part is represented as y =0.16x +0.1, and the value range of x is 0-20; the chin part is concave inverse parabolic, and the cross-sectional shape is expressed as y =0.024e0.13xThe value range of x is 10-40;
the forehead part (1), the temple part (2), the cheek part (3) and the lower jaw part (4) are connected in a smooth transition way to form a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084090.7A CN107754111B (en) | 2017-11-07 | 2017-11-07 | Inverse parabola shape inverse folding edge structure of gas mask sealing frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084090.7A CN107754111B (en) | 2017-11-07 | 2017-11-07 | Inverse parabola shape inverse folding edge structure of gas mask sealing frame |
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| Publication Number | Publication Date |
|---|---|
| CN107754111A CN107754111A (en) | 2018-03-06 |
| CN107754111B true CN107754111B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711084090.7A Active CN107754111B (en) | 2017-11-07 | 2017-11-07 | Inverse parabola shape inverse folding edge structure of gas mask sealing frame |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3362403A (en) * | 1963-12-11 | 1968-01-09 | Robertshaw Controls Co | Unified helmet and oxygen breathing assembly |
| US4402316A (en) * | 1981-04-27 | 1983-09-06 | U.S.D. Corp. | Breathing gas mask |
| USH397H (en) * | 1986-06-13 | 1988-01-05 | The United States Of America As Represented By The Secretary Of The Army | Modified bubble inturn mask periphery |
| FR2674440B1 (en) * | 1991-03-27 | 1993-07-16 | Linx Optique | OPTICAL LENS SUPPORT FRAME FOR WATERPROOF MASK HOLDER. |
| WO2013119746A2 (en) * | 2012-02-07 | 2013-08-15 | Diving Unlimited International, Inc. | Seal for full face mask |
| CN204217969U (en) * | 2014-09-18 | 2015-03-25 | 宋搏 | Mouth mask |
-
2017
- 2017-11-07 CN CN201711084090.7A patent/CN107754111B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3362403A (en) * | 1963-12-11 | 1968-01-09 | Robertshaw Controls Co | Unified helmet and oxygen breathing assembly |
| US4402316A (en) * | 1981-04-27 | 1983-09-06 | U.S.D. Corp. | Breathing gas mask |
| USH397H (en) * | 1986-06-13 | 1988-01-05 | The United States Of America As Represented By The Secretary Of The Army | Modified bubble inturn mask periphery |
| FR2674440B1 (en) * | 1991-03-27 | 1993-07-16 | Linx Optique | OPTICAL LENS SUPPORT FRAME FOR WATERPROOF MASK HOLDER. |
| WO2013119746A2 (en) * | 2012-02-07 | 2013-08-15 | Diving Unlimited International, Inc. | Seal for full face mask |
| CN204217969U (en) * | 2014-09-18 | 2015-03-25 | 宋搏 | Mouth mask |
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| Publication number | Publication date |
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| CN107754111A (en) | 2018-03-06 |
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Address after: The New Zealand Jiancaoping District, 030008 Taiyuan Road, Shanxi, No. 71 Applicant after: Shanxi Xinhua Chemical Defense Equipment Research Institute Co.,Ltd. Address before: 030008 Shanxi province Taiyuan Xinlan Road No. 33 Applicant before: SHANXI XINHUA CHEMICAL Co.,Ltd. |
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Effective date of registration: 20221201 Address after: The New Zealand Jiancaoping District, 030008 Taiyuan Road, Shanxi, No. 71 Patentee after: Shanxi Xinhua Chemical Defense Equipment Research Institute Co.,Ltd. Patentee after: INSTITUTE OF CHEMICAL DEFENSE, CHINESE ACADEMY OF MILITARY SCIENCES Address before: The New Zealand Jiancaoping District, 030008 Taiyuan Road, Shanxi, No. 71 Patentee before: Shanxi Xinhua Chemical Defense Equipment Research Institute Co.,Ltd. |