Fire fighting mask

Abstract

The utility model relates to fire fighting equipment technical field discloses fire mask, including mask main part, the detachable connection of mask main part filter canister subassembly, filter canister subassembly includes filter canister body and is used for closing filter canister body opening's filter canister sealing cover, the inner wall rotation of filter canister sealing cover is connected with a plurality of rotating shafts, and one end fixedly connected with the clamping piece of rotating shaft, the other end of rotating shaft projects filter canister sealing cover and fixedly connected with the knob, and the spring of pressing is equipped between the knob and filter canister sealing cover, the outer wall of filter canister body is set up with the guide groove of clamping piece adaptation, and the inner chamber of filter canister body corresponds the end of guide groove and is set up with the clamping groove, and the clamping piece is after sliding with the clamping groove and is locked with clamping groove, the surface of rotating shaft is equipped with the limiting structure for limiting knob rotation angle.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, specifically to fire-fighting face shields. Background Technology

[0002] Firefighting masks are personal protective equipment used by firefighters when performing tasks. They are mainly used to protect the wearer's breathing and prevent the inhalation of smoke, toxic gases and other harmful substances. Firefighting masks can be divided into various types, and the specific usage and protection range will vary depending on their type and design. Common firefighting masks include high-pressure air breathing apparatus masks, open-type air breathing apparatus masks and low-efficiency filter half-masks. Therefore, wearing a suitable firefighting mask can help firefighters protect their own safety and complete rescue missions when facing fires or other emergencies.

[0003] In the current fire protection field, commonly used fire masks are mainly used to provide wearers with a clean breathing air source in fire or hazardous gas environments. These masks usually contain a filter canister, which filters harmful gases and particulate matter to ensure that the air the wearer breathes is safe. However, there are often certain problems with the connection and fixation between the filter canister and the filter canister sealing cap. Specifically, the currently widely used method of connection and fixation using protruding clips, although simple in structure, may not be secure enough in actual use, especially when facing external impact. This fixing method can easily cause the filter canister and the sealing cap to detach, thereby affecting the functionality of the mask and the safety of the user.

[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a fire-fighting face shield. Utility Model Content

[0005] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for fire-fighting face shields. Firstly, it solves the defects of traditional protruding blocks, such as "single-point contact and easy loosening," through a triple locking mechanism of "screw-in of the snap-fit ​​piece into the slot + axial pre-tightening of the compression spring + limiting of the triangular block and the triangular slot." The surface contact between the snap-fit ​​piece and the slot, combined with the continuous pre-tightening force of the compression spring, can withstand stronger external impacts (such as collisions or falls in a fire), ensuring that the filter canister sealing cap and the filter canister body are always tightly fitted, preventing harmful gases from seeping in due to connection failure. Secondly, the limiting structure, through the interlocking of the triangular block and the triangular slot, strictly limits the rotation angle of the rotating shaft, preventing the snap-fit ​​piece from accidentally unscrewing out of the slot due to accidental contact or vibration, further enhancing the reliability of the connection.

[0006] This utility model provides the following technical solution: a fire-fighting face mask, including a face mask body and a filter canister assembly detachably connected to the face mask body, wherein the filter canister assembly includes a filter canister body and a filter canister sealing cap for closing the opening of the filter canister body;

[0007] The inner wall of the filter canister sealing cap is rotatably connected to multiple rotating shafts. One end of each rotating shaft is fixedly connected to a snap-fit ​​piece, and the other end of the rotating shaft extends out of the filter canister sealing cap and is fixedly connected to a knob. A compression spring is sleeved between the knob and the filter canister sealing cap. The outer wall of the filter canister body has a guide groove that matches the snap-fit ​​piece. The inner cavity of the filter canister body has a slot corresponding to the end of the guide groove. After sliding through the guide groove, the snap-fit ​​piece engages and locks with the slot.

[0008] The surface of the rotating shaft is provided with a limiting structure for limiting the rotation angle of the knob.

[0009] As a preferred technical solution of this utility model, the limiting structure includes a connecting piece fixedly sleeved on the surface of the rotating shaft. A plurality of triangular locking blocks are fixedly connected to the side of the connecting piece facing the filter canister sealing cover. The inner wall of the filter canister sealing cover is provided with a triangular locking groove adapted to the triangular locking blocks. The triangular locking blocks and the triangular locking groove are both distributed in a ring array along the circumference of the rotating shaft.

[0010] As a preferred embodiment of this utility model, the surface of the knob is provided with anti-slip texture, which is a concave stripe distributed along the axial direction of the knob, and the cross-section of the concave stripe is an arc shape.

[0011] As a preferred technical solution of this utility model, the face mask body is provided with a facial sealing pad inside, the facial sealing pad is a silicone facial sealing pad, and the facial sealing pad has an internal breathing channel that communicates with the filter canister body.

[0012] As a preferred embodiment of this utility model, an exhalation valve is embedded inside the main body of the mask. The inlet end of the exhalation valve is coaxially arranged with the outlet end of the filter canister body. The exhalation valve and the filter canister body are connected by a ring-shaped locking mechanism.

[0013] As a preferred technical solution of this utility model, four elastic bands are fixedly connected to the outer side wall of the mask body, and a D-ring type adjustment buckle is rotatably connected to the middle of each elastic band, and a head fixing strap is inserted through the inner cavity of the D-ring type adjustment buckle.

[0014] As a preferred embodiment of this utility model, the facial sealing pad has a corrugated sealing protrusion on the side facing the human face, and the exhalation valve has a waterproof and breathable membrane at the outlet end.

[0015] As a preferred embodiment of this invention, the compression spring is used to apply a pre-tightening force toward the filter canister body to the snap-fit ​​tab.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model solves the defects of traditional protruding blocks that are "single-point contact and easy to loosen" by using a triple locking mechanism of "screw-in of the snap-fit ​​piece into the slot + axial pre-tightening of the compression spring + limiting of the triangular snap-fit ​​block and the triangular slot". The surface contact between the snap-fit ​​piece and the slot, combined with the continuous pre-tightening force of the compression spring, can withstand stronger external impact forces (such as collisions in a fire or falling), ensuring that the filter canister sealing cap and the filter canister body are always tightly fitted, and preventing harmful gases from seeping in due to connection failure.

[0018] 2. The limiting structure of this utility model strictly limits the rotation angle of the rotating shaft by the engagement of the triangular block and the triangular slot, preventing the locking piece from accidentally rotating out of the slot due to accidental contact or vibration, and further enhancing the reliability of the connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the facial sealing pad structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the exhalation valve structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the filter canister body structure of this utility model;

[0023] Figure 5 This is a partial cross-sectional view of the present invention;

[0024] Figure 6 This is a schematic diagram of the snap-fit ​​structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the guide groove structure of this utility model;

[0026] Figure 8 This is a schematic diagram of the triangular slot structure of this utility model.

[0027] In the diagram: 1. Mask body; 101. Filter canister body; 102. Filter canister sealing cap; 2. Rotating shaft; 201. Snap-fit ​​piece; 202. Knob; 203. Compression spring; 204. Guide groove; 205. Snap-fit ​​groove; 3. Connecting piece; 301. Triangular snap block; 302. Triangular snap-fit ​​groove; 4. Face sealing pad; 401. Internal breathing channel; 5. Exhalation valve; 6. Elastic band; 601. D-ring type adjustment buckle; 602. Head restraint strap. Detailed Implementation

[0028] 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 protection scope of the present utility model.

[0029] Please see Figure 1-8 As shown, the fire-fighting face mask includes a face mask body 1 and a filter canister assembly detachably connected to the face mask body 1. The filter canister assembly includes a filter canister body 101 and a filter canister sealing cap 102 for sealing the opening of the filter canister body 101.

[0030] Multiple rotating shafts 2 are rotatably connected to the inner wall of the filter canister sealing cap 102. One end of the rotating shaft 2 is fixedly connected to a snap-fit ​​piece 201, and the other end of the rotating shaft 2 extends out of the filter canister sealing cap 102 and is fixedly connected to a knob 202. A compression spring 203 is sleeved between the knob 202 and the filter canister sealing cap 102. The outer wall of the filter canister body 101 is provided with a guide groove 204 that matches the snap-fit ​​piece 201. The inner cavity of the filter canister body 101 is provided with a slot 205 corresponding to the end of the guide groove 204. After the snap-fit ​​piece 201 slides through the guide groove 204, it snaps into the slot 205 and locks in place.

[0031] The surface of the rotating shaft 2 is provided with a limiting structure for limiting the rotation angle of the knob 202;

[0032] The limiting structure is used to prevent the snap-fit ​​piece 201 from disengaging from the slot 205;

[0033] The limiting structure includes a connecting piece 3 fixedly sleeved on the surface of the rotating shaft 2. Multiple triangular blocks 301 are fixedly connected to the side of the connecting piece 3 facing the filter canister sealing cover 102. The inner wall of the filter canister sealing cover 102 is provided with triangular slots 302 that are adapted to the triangular blocks 301. The triangular blocks 301 and the triangular slots 302 are arranged in a ring array along the circumference of the rotating shaft 2.

[0034] The surface of the knob 202 is provided with anti-slip texture, which is a concave stripe distributed along the axial direction of the knob 202, and the cross section of the concave stripe is arc-shaped;

[0035] The anti-slip texture is used to increase friction when working in wet conditions or while wearing gloves;

[0036] The face mask body 1 has a face sealing pad 4 inside. The face sealing pad 4 is a silicone face sealing pad. An internal breathing channel 401 is opened inside the face sealing pad 4, which is connected to the filter canister body 101.

[0037] An exhalation valve 5 is embedded inside the main body 1 of the mask. The air inlet of the exhalation valve 5 is coaxially arranged with the air outlet of the filter canister body 101. The exhalation valve 5 and the filter canister body 101 are connected by a ring-shaped locking mechanism.

[0038] Four elastic bands 6 are fixedly connected to the outer side wall of the mask body 1. Each elastic band 6 is rotatably connected to the middle of a D-ring type adjustment buckle 601. A head fixing strap 602 passes through the inner cavity of the D-ring type adjustment buckle 601.

[0039] The face sealing pad 4 has a corrugated sealing protrusion on the side facing the human face, and the exhalation valve 5 has a waterproof and breathable membrane at the outlet end.

[0040] Corrugated sealing protrusions are used to enhance the airtightness of the facial fit;

[0041] A waterproof and breathable membrane is used to prevent external liquids from flowing back into the filter canister body 101;

[0042] The compression spring 203 is used to apply a preload force toward the filter canister body 101 to the snap-fit ​​tab 201.

[0043] The core working principle of this fire-fighting face mask revolves around the quick snap-fit ​​fixing and sealing protection of the filter canister assembly. The connection between the filter canister sealing cap 102 and the filter canister body 101 is reliably locked through a "press-rotate" linkage structure, the specific process of which is as follows:

[0044] During installation, first engage the filter canister sealing cap 102 with the filter canister body 101, so that the snap-fit ​​piece 201 is aligned with the guide groove 204 on the outer wall of the filter canister body. At this time, the compression spring 203 is in its natural state and the snap-fit ​​piece 201 is not under force.

[0045] Manually press the knob 202 to drive the rotating shaft 2 to move towards the inner cavity of the filter canister body 101. The compression spring 203 is compressed and stores elastic potential energy until the locking piece 201 reaches the entrance of the slot 205 at the end of the guide groove 204.

[0046] While maintaining the pressing state, rotate the knob 202 to drive the rotating shaft 2 and the snap-fit ​​piece 201 to rotate synchronously. The snap-fit ​​piece 201 is screwed into the snap-fit ​​groove 205 from the end of the guide groove 204 to complete the snap-fit.

[0047] After the knob 202 is released, the spring 203 releases its elastic potential energy and applies a reverse thrust to the knob 202, causing the rotating shaft 2 and the snap-fit ​​piece 201 to return to the direction of the filter canister sealing cover 102, so that the snap-fit ​​piece 201 fits tightly against the inner wall of the slot 205, forming an axial preload. At the same time, the limiting structure (the triangular snap-fit ​​piece 301 on the connecting piece 3 and the triangular slot 302 on the inner wall of the filter canister sealing cover) engages, restricting the rotation of the rotating shaft 2 and ensuring that the snap-fit ​​piece 201 is snapped into the slot 205.

[0048] During disassembly, first press the knob 202 to compress the spring 203, causing the snap-fit ​​piece 201 to disengage from the inner wall of the slot 205; at the same time, the limiting structure unlocks (the triangular snap-fit ​​piece 301 disengages from the triangular slot 302), and the snap-fit ​​piece 201 rotates back from the slot 205 to the guide groove 204; finally, pull out the slot 205 along the guide groove 204 to complete the separation.

[0049] Face sealing pad 4: Through the soft properties of silicone material and corrugated sealing protrusions, it fits tightly to the face and, together with the internal breathing channel 401, guides the clean air output from the filter canister body 101 to the mouth and nose area, preventing external toxic gases from seeping in.

[0050] Exhalation valve 5: It is coaxially snapped into the filter canister body 101 and achieves one-way exhaust through a waterproof and breathable membrane, preventing exhaled moisture from flowing back into the filter canister and affecting the performance of the filter material, while also preventing external liquid from flowing back in.

[0051] Head fixation system: Four elastic bands 6, together with D-ring type adjustment buckles 601 and head fixation straps 602, can quickly adjust the tightness to ensure that the mask body 1 fits the head stably during complex movements without affecting the sealing performance of the filter canister assembly.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Firefighting face shield, including: The mask body (1) and the filter canister assembly detachably connected to the mask body (1) include a filter canister body (101) and a filter canister sealing cap (102) for closing the opening of the filter canister body (101); The filter canister sealing cover (102) is characterized by having multiple rotating shafts (2) rotatably connected to its inner wall. One end of each rotating shaft (2) is fixedly connected to a snap-fit ​​piece (201), and the other end of each rotating shaft (2) extends out of the filter canister sealing cover (102) and is fixedly connected to a knob (202). A compression spring (203) is sleeved between the knob (202) and the filter canister sealing cover (102). The outer wall of the filter canister body (101) is provided with a guide groove (204) that is adapted to the snap-fit ​​piece (201). The inner cavity of the filter canister body (101) is provided with a slot (205) corresponding to the end of the guide groove (204). The snap-fit ​​piece (201) slides through the guide groove (204) and engages with the slot (205) for locking. The surface of the rotating shaft (2) is provided with a limiting structure for limiting the rotation angle of the knob (202).

2. The fire-fighting face mask according to claim 1, characterized in that: The limiting structure includes a connecting piece (3) fixedly sleeved on the surface of the rotating shaft (2). A plurality of triangular blocks (301) are fixedly connected to the side of the connecting piece (3) facing the filter canister sealing cover (102). The inner wall of the filter canister sealing cover (102) is provided with a triangular groove (302) adapted to the triangular block (301). The triangular blocks (301) and the triangular groove (302) are both arranged in a ring array along the circumference of the rotating shaft (2).

3. The fire-fighting face mask according to claim 1, characterized in that: The surface of the knob (202) is provided with anti-slip texture, which is a concave stripe distributed along the axial direction of the knob (202), and the cross section of the concave stripe is arc-shaped.

4. The fire-fighting face mask according to claim 1, characterized in that: The face mask body (1) is provided with a face sealing pad (4) inside. The face sealing pad (4) is a silicone face sealing pad. An internal breathing channel (401) communicating with the filter canister body (101) is opened inside the face sealing pad (4).

5. The fire-fighting face mask according to claim 4, characterized in that: The mask body (1) is equipped with an exhalation valve (5). The inlet end of the exhalation valve (5) is coaxially arranged with the outlet end of the filter canister body (101). The exhalation valve (5) and the filter canister body (101) are connected by a ring-shaped locking mechanism.

6. The fire-fighting face mask according to claim 1, characterized in that: Four elastic bands (6) are fixedly connected to the outer side wall of the mask body (1). Each elastic band (6) is rotatably connected to a D-ring type adjustment buckle (601) in the middle. A head fixing strap (602) passes through the inner cavity of the D-ring type adjustment buckle (601).

7. The fire-fighting face mask according to claim 5, characterized in that: The facial sealing pad (4) has a corrugated sealing protrusion on the side facing the human face, and the exhalation valve (5) has a waterproof and breathable membrane at the outlet end.

8. The fire-fighting face mask according to claim 1, characterized in that: The compression spring (203) is used to apply a preload force toward the filter canister body (101) to the snap-fit ​​tab (201).

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