Alarm for ventilation gas mask and ventilation gas mask

Abstract

The utility model discloses an alarm for a ventilation gas mask and the ventilation gas mask, and relates to the technical field of ventilation gas masks, the alarm comprises a housing, a warning member and an elastic member, the housing is internally provided with an accommodating cavity, and the lower end of the housing is provided with an air inlet for air intake; the warning piece is movably arranged in the accommodating cavity; the elastic piece is arranged in the containing cavity, one end of the elastic piece abuts against the warning piece, and the other end of the elastic piece abuts against the end, away from the air inlet, of the shell. Wherein the lower end of the shell is provided with a transparent area, and the warning piece is used for moving in the containing cavity under the action of air inlet pressure and moving into the transparent area or moving out of the transparent area so that a user can check the warning piece. The technical scheme provided by the utility model is used for simplifying the structure of the alarm and reducing the cost of the alarm.

Description

Technical Field

[0001] This utility model relates to the field of ventilation mask technology in polluted work environments, and particularly to an alarm and a ventilation mask. Background Technology

[0002] Wearing a ventilated face mask is an important protective measure in areas where radioactive aerosol contamination may occur. Ventilated face masks typically contain an IDB (Indoor Depressant) alarm. These alarms on the market typically display green when there is sufficient airflow and red when there is insufficient airflow, using the alternation of these two colors to alert the user. However, commercially available IDB alarm devices are complex in structure and relatively expensive.

[0003] Therefore, this application designs an alarm device with a simple structure and low cost. Utility Model Content

[0004] This utility model proposes an alarm for a ventilated face mask, with the aim of designing a ventilated face mask with a simple structure and low cost.

[0005] To achieve the above objectives, this utility model proposes an alarm device for a ventilated face mask, comprising:

[0006] The housing has an internal cavity and an air inlet at its lower end.

[0007] Warning element, wherein the warning element is movably disposed within the receiving cavity;

[0008] An elastic element is disposed within the receiving cavity, with one end of the elastic element abutting against the warning element and the other end abutting against the end of the housing away from the air inlet.

[0009] The lower end of the housing has a transparent area, and the warning element is used to move within the receiving cavity under the action of air intake pressure, and to move into or out of the transparent area for the user to view.

[0010] In one embodiment, the housing includes a lower cylinder and an upper cylinder, which are assembled to form the receiving cavity.

[0011] In one embodiment, the inner wall of the upper cylinder has an internal thread, a portion of the lower cylinder extends into the upper cylinder, and the portion extending into the upper cylinder has an external thread adapted to the internal thread.

[0012] In one embodiment, the lower cylinder has a first cylindrical cavity inside, and the warning element is disposed inside the first cylindrical cavity.

[0013] In one embodiment, the air inlet is located at the end of the lower cylinder away from the upper cylinder, and the upper cylinder is provided with an air vent at the end away from the lower cylinder.

[0014] In one embodiment, the warning element includes an integrally formed main body, a sealing ring, and a connecting portion. The main body extends axially along the lower cylinder, the sealing ring is disposed in the circumferential direction of the main body and abuts tightly against the first cylindrical cavity, and the connecting portion is disposed at one end of the main body near the elastic member for connecting the elastic member.

[0015] In one embodiment, the number of sealing ring portions is at least two.

[0016] In one embodiment, the elastic element is a spring, one end of which abuts against the bottom wall of the upper cylinder, and the other end is sleeved on the connecting part.

[0017] In one embodiment, the lower cylinder is transparent; and / or, the warning element is red.

[0018] This application also proposes a ventilated face mask, including the aforementioned alarm.

[0019] The alarm device for ventilated face masks of this utility model has a simple structure and low cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the alarm provided by this utility model;

[0022] Figure 2 A cross-sectional structural schematic diagram of an embodiment of the alarm provided by this utility model;

[0023] Figure 3 An exploded structural diagram of an embodiment of the alarm provided by this utility model.

[0024] Explanation of icon numbers:

[0025] 10. Shell; 10a. Air inlet; 11. Lower cylinder; 111. First cylindrical cavity; 12. Upper cylinder; 121. Second cylindrical cavity; 1211. Third cylindrical cavity; 1212. Fourth cylindrical cavity; 122. Vent; 20. Warning element; 21. Main body; 22. Sealing ring; 23. Connecting part; 30. Elastic element. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3As shown in the figure, an embodiment of this application provides an alarm for a ventilated face mask, including a housing 10, a warning element 20, and an elastic element 30. The housing 10 has a receiving cavity inside, and the lower end of the housing 10 has an air inlet 10a for air intake. The warning element 20 is movably disposed within the receiving cavity. The elastic element 30 is disposed within the receiving cavity, with one end of the elastic element 30 abutting against the warning element 20 and the other end abutting against the end of the housing 10 away from the air inlet 10a. The lower end of the housing 10 has a transparent area. The warning element 20 is used to move within the receiving cavity under the action of air intake pressure, moving to or outside the transparent area for the user to view.

[0030] Specifically, the alarm of this application is installed inside the ventilated face mask for observation by the user in a contaminated area. The housing 10 has an internal cavity for accommodating a warning element 20, which is disposed within the cavity. One end of the elastic member 30 abuts against the warning element 20, and the other end abuts against the bottom wall of the upper end of the cavity. The lower end of the housing 10 has an air inlet 10a connected to the cavity, allowing external air to enter and contact the warning element 20, thereby moving the warning element 20 within the cavity.

[0031] During use, an external air pipe is connected to the air inlet 10a at the lower end of the housing 10 via a connecting pipe to deliver breathable air to the alarm. Under gas pressure, the warning element 20 compresses the elastic element 30, causing the warning element 20 to move outside the transparent area. If the user cannot see the warning element 20 when observing the transparent area, it indicates that the external gas pressure is sufficient, providing enough breathing air for the operator. Alternatively, if the external gas supply is insufficient, the elasticity of the elastic element 30 exceeds the gas pressure, causing it to push the warning element 20 into the transparent area. The user can then directly observe the warning element 20 through the transparent area. In this case, the operator must immediately leave the contaminated environment to prevent danger from insufficient air supply.

[0032] It should be noted that the warning element 20 is a bright color to distinguish it from the transparent element, allowing operators to easily confirm whether the gas supply is sufficient. In some optional embodiments, the warning element 20 is red to facilitate alerting operators.

[0033] In an optional embodiment, the housing 10 includes a lower cylinder 11 and an upper cylinder 12, which are assembled to form a receiving cavity. The inner wall of the upper cylinder 12 has internal threads, a portion of the lower cylinder 11 extends into the upper cylinder 12, and the portion extending into the upper cylinder 12 has external threads adapted to the internal threads.

[0034] Specifically, the housing 10 is assembled from two lower cylinders 11, with an upper cylinder 12 fitted over a portion of the upper end of the lower cylinder 11, allowing other parts of the lower cylinder 11 to be exposed. The upper cylinder 12 and the lower cylinder 11 are secured by internal and external threads. The upper cylinder 12 is opaque, while the transparent area is located on the lower cylinder 11. When the upper cylinder 12 and the lower cylinder 11 are assembled as a single unit, a portion of the lower cylinder 11 is located outside the upper cylinder 12, allowing the transparent area on the lower cylinder 11 to be exposed for viewing by operators. In an optional embodiment, the lower cylinder 11 is made of a transparent material, making the entire lower cylinder 11 transparent, reducing the need for separately designed transparent areas and further simplifying the structure of the lower cylinder 11. During use, the portion of the lower cylinder 11 not inserted into the upper cylinder 12 can be directly observed by operators.

[0035] The lower cylinder 11 has a first cylindrical cavity 111 inside, and the warning element 20 is disposed in the first cylindrical cavity 111. The upper cylinder 12 has a second cylindrical cavity 121 inside. The second cylindrical cavity 121 is a stepped cavity. The second cylindrical cavity 121 includes a third cylindrical cavity 1211 and a fourth cylindrical cavity 1212. The diameter of the third cylindrical cavity 1211 is larger than that of the fourth cylindrical cavity 1212, and the inner diameter of the third cylindrical cavity 1211 is adapted to the outer diameter of the upper cylinder 12. The upper end of the lower cylinder 11 extends into the third cylindrical cavity 1211. One end of the elastic element 30 abuts against the warning element 20, and the other end abuts against the bottom wall of the fourth cylindrical cavity 1212, applying a downward elastic force to the warning element 20. Gas entering from the air inlet 10a at the lower end of the lower cylinder 11 applies upward pressure to the warning element 20. When the pressure is sufficient, the gas pressure exceeds the elastic force of the warning element 20 and its weight, causing the warning element 20 to move upwards into the upper cylinder 12. Since the upper cylinder 12 is opaque, the operator can only see the transparent lower cylinder 11. When the gas pressure is insufficient, the elastic force of the elastic element 30 exceeds the gas pressure, causing the warning element 20 to move towards the lower cylinder 11, becoming visible within the lower cylinder 11 to alert the operator of insufficient gas pressure.

[0036] The air inlet 10a is located at the lower end of the lower cylinder 11 away from the upper cylinder 12, that is, the air inlet 10a is located at the lower end of the lower cylinder 11. The upper cylinder 12 is located at the upper end away from the lower cylinder 11 with a vent 122, that is, the upper end of the upper cylinder 12 has a vent 122. The vent 122 is used to connect the receiving cavity to the outside, so that the warning element 20 can move inside the receiving cavity.

[0037] In an optional embodiment, the warning element 20 includes an integrally formed main body 21, a sealing ring 22, and a connecting portion 23. The main body 21 extends axially along the lower cylinder 11, and the sealing ring 22 is disposed circumferentially on the main body 21 and abuts tightly against the first cylindrical cavity 111. The connecting portion 23 is disposed at one end of the main body 21 near the elastic member 30 and is used to connect the elastic member 30.

[0038] Specifically, the warning element 20 includes a main body 21, a sealing ring 22, and a connecting part 23. The length direction of the main body 21 is the axial direction of the lower cylinder 11. The sealing ring 22 is disposed outside the main body 21 and is disposed in the circumferential direction of the main body 21 to tightly abut against the first cylindrical cavity 111 inside the lower cylinder 11, thereby ensuring the sealing performance between the warning element 20 and the inner wall of the first cylindrical cavity 111. The connecting part 23 is disposed at the upper end of the main body 21 for connecting the elastic element 30.

[0039] In an optional embodiment, the number of sealing ring portions 22 is set to at least two. The elastic element 30 is a spring, one end of which abuts against the bottom wall of the upper cylinder 12, and the other end is sleeved on the connecting portion 23.

[0040] Specifically, in this embodiment, the number of sealing rings 22 is set to three. The three sealing rings 22 are spaced apart at both ends and the middle of the main body 21. Due to manufacturing tolerances, multiple sealing rings 22 are provided to compensate for the manufacturing tolerances and ensure the sealing performance between the sealing rings 22 and the inner wall of the first cylindrical cavity 111. The elastic element 30 is a spring, which is disposed inside the upper cylinder 12. The lower end of the spring is sleeved on the connecting part 23, and the other end of the spring abuts against the bottom wall of the fourth cylindrical cavity 1212 of the upper cylinder 12.

[0041] This application also protects a ventilated face mask that includes the aforementioned alarm.

[0042] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An alarm device for a ventilated face mask, characterized in that, include: The housing has an internal cavity and an air inlet at its lower end. Warning element, wherein the warning element is movably disposed within the receiving cavity; An elastic element is disposed within the receiving cavity, with one end of the elastic element abutting against the warning element and the other end abutting against the end of the housing away from the air inlet. The lower end of the housing has a transparent area, and the warning element is used to move within the receiving cavity under the action of air intake pressure, and to move into or out of the transparent area for the user to view.

2. The alarm for a ventilated face mask as described in claim 1, characterized in that, The housing includes a lower cylinder and an upper cylinder, which are assembled to form the receiving cavity.

3. The alarm for a ventilated face mask as described in claim 2, characterized in that, The inner wall of the upper cylinder has an internal thread, a portion of the lower cylinder extends into the upper cylinder, and the portion extending into the upper cylinder has an external thread that is adapted to the internal thread.

4. The alarm for a ventilated face mask as described in claim 2, characterized in that, The lower cylinder has a first cylindrical cavity inside, and the warning device is disposed inside the first cylindrical cavity.

5. The alarm for a ventilated face mask as described in claim 4, characterized in that, The air inlet is located at the end of the lower cylinder away from the upper cylinder, and the upper cylinder is provided with an air vent at the end away from the lower cylinder.

6. The alarm for a ventilated face mask as described in claim 5, characterized in that, The warning component includes an integrally formed main body, a sealing ring, and a connecting part. The main body extends along the axial direction of the lower cylinder. The sealing ring is disposed in the circumferential direction of the main body and abuts tightly against the first cylindrical cavity. The connecting part is disposed at one end of the main body near the elastic member and is used to connect the elastic member.

7. The alarm for a ventilated face mask as described in claim 6, characterized in that, The number of sealing rings is at least two.

8. The alarm for a ventilated face mask as described in claim 6, characterized in that, The elastic element is a spring, with one end of the spring abutting against the bottom wall of the upper cylinder and the other end sleeved on the connecting part.

9. The alarm for a ventilated face mask as described in claim 2, characterized in that, The lower cylinder is transparent; and / or the warning element is red.

10. A ventilated face mask, characterized in that, Including the alarm as described in any one of claims 1-8.

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