Breathing filter

Abstract

The utility model discloses a breathing filter which comprises a shell and a filtering assembly, and the filtering assembly is arranged in the shell. The shell comprises a first part and a second part, the interior of the first part is hollow to form a first cavity penetrating through the first part, and a clamping groove is formed in the inner wall; the interior of the second part is hollow to form a second cavity penetrating through the second part, a protruding clamping hook and an abutting part are arranged on the outer wall, the first cavity and the second cavity are communicated to form a channel, and the filtering assembly is arranged on the channel; when the first part and the second part are installed, the clamping hook is clamped into the clamping groove, the clamping hook abuts against the filtering assembly, and the abutting part abuts against the outer end face of the first part, so that the first part and the second part are clamped into a whole. According to the breathing filter, the shells are fixedly assembled through a mechanical structure, the shells are connected in a clamped mode, the shells can be fully sealed as long as the shells are assembled in place, the phenomena of air leakage and the like are effectively avoided, the production technology is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a breathing filter. Background Art

[0002] Existing respiratory filters usually have a shell with a filter assembly inside. When the user uses it, the gas exhaled and inhaled by the user passes through the filter assembly, which can remove some virus particles, assist breathing, avoid cross infection, and provide certain protection for the user. The shell of the respiratory filter can be composed of multiple components, which are assembled by ultrasonic welding or glue bonding. If the welding or bonding is not in place, there is a risk of air leakage. Therefore, after assembly, it is necessary to check 100% of the finished product to see if it meets the use requirements. This places high demands on the production process, increasing the production cycle and production costs. Utility Model Content

[0003] The main technical problem solved by the utility model is to provide a breathing filter which does not need to be assembled by welding or bonding, thus simplifying the process and avoiding the above-mentioned defects.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a breathing filter, the breathing filter comprises a shell and a filter assembly, the filter assembly is arranged in the shell;

[0005] The housing comprises a first part and a second part, the first part is hollow inside to form a first cavity penetrating the first part, and a slot is provided on the inner wall; the second part is hollow inside to form a second cavity penetrating the second part, and a protruding hook and abutting part are provided on the outer wall, the first cavity is connected with the second cavity to form a passage, and the filter assembly is arranged on the passage;

[0006] When the first part and the second part are installed, the hook is inserted into the slot, and the hook abuts against the filter assembly, and the abutting part abuts against the outer end surface of the first part, so that the first part and the second part are clamped together.

[0007] Wherein, the second part comprises a main body, the hook protrudes from the edge of the main body, and the abutment portion is formed by extending from the edge of the main body;

[0008] The hook at least comprises a first surface and a second surface adjacent to each other, an angle is formed between the first surface and the second surface, and the first surface is parallel to the side wall of the slot;

[0009] The extending direction of the abutting portion is perpendicular to the length direction of the main body and parallel to the outer end surface of the first portion.

[0010] Wherein, the card slot includes side walls located at two opposite sides and a bottom located between the two side walls;

[0011] The filter assembly is disposed in the slot and abuts against one of the side walls of the slot; when the hook abuts against the filter assembly, the first surface abuts against the other side wall of the slot, so that the filter assembly and the hook are both stuck in the slot.

[0012] Wherein, the sum of the thickness of the filter assembly and the height of the hook is greater than the height of the slot.

[0013] Wherein, the filter component is made of elastic material.

[0014] The connecting portion between the hook and the abutting portion is the outer wall of the main body, the connecting portion between the slot and the outer end surface of the first portion is the inner wall of the first portion, and the outer wall of the main body and the inner wall of the first portion are interference fit.

[0015] Wherein, the size of the outer wall of the main body is equal to or greater than the size of the inner wall of the first part.

[0016] Wherein, the filter component includes filter cotton.

[0017] Wherein, the material of the shell is PP.

[0018] Compared with the prior art, the beneficial effects achieved by the breathing filter of the utility model are: the shell is fixedly assembled by a mechanical structure, and the shells are mutually clamped. As long as they are assembled in place, they can be fully sealed, effectively avoiding leakage and the like, simplifying the production process and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a cross-sectional view of the first part of the breathing filter of the utility model;

[0021] Figure 2 It is a cross-sectional view of the second part of the breathing filter of the utility model;

[0022] Figure 3 It is a cross-sectional view of the breathing filter of the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the utility model embodiment, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] See also Figures 1 to 3 , Figure 3 It is a cross-sectional schematic diagram of a breathing filter of the utility model, the breathing filter comprises a shell and a filter assembly 100, the filter assembly 100 is arranged in the shell; the shell comprises a first part 1 and a second part 2, the interior of the first part 1 is hollow to form a first cavity 11 penetrating the first part 1, and a slot 13 is provided on the inner wall 12; the interior of the second part 2 is hollow to form a second cavity 21 penetrating the second part 2, and a protruding hook 23 and an abutment portion 24 are provided on the outer wall 22, the first cavity 11 is connected with the second cavity 21 to form a passage, and the filter assembly 100 is arranged on the passage; when the first part 1 and the second part 2 are installed, the hook 23 is inserted into the slot 13, and the hook 23 abuts against the filter assembly 100, and the abutment portion 23 abuts against the outer end surface 14 of the first part 1, so that the first part 1 and the second part 2 are clamped together.

[0027] The housing in the present application includes a first part 1 and a second part 2 that are engaged with each other, and the two are engaged with each other through a hook 23 and a slot 13. The assembly can be completed by simply pushing the second part 2 into the first part 1, without welding or bonding, and the assembly is simple and efficient. For ease of explanation, the first part 1 is arranged on the upper part of the second part 2, and the hook 23 is located on the upper part of the abutment part 24.

[0028] The first part 1 and the second part 2 are both hollow inside, and are respectively provided with a first cavity 11 and a second cavity 21 for gas to pass through during use. The filter assembly 100 is arranged on the passage to filter the gas. Of course, the filter assembly 100 can be arranged between the first cavity 11 and the second cavity 21, or can be arranged in the first part 1 or the second part 2, and can both play the role of filtering the gas. For ease of use, in one embodiment, the shapes of the first part 1 and the second part 2 are similar to mouthpieces, with trumpet-shaped openings, and the filter assembly 100 is arranged in the first cavity 11 in the first part 1.

[0029] The slot 13 is a slot body arranged around the inner wall 12, the hook 23 protrudes from one end of the second part 2, and the abutment portion 24 protrudes from the side of the second part 2, and is used to abut against the bottom of the first part 1. The slot 13 in the first part 1 is used to cooperate with the hook 23 of the second part 2, the hook 23 protruding from the first part 1 is stuck in the slot 13, the hook 23 at the upper end abuts against the filter assembly 100 arranged in the first part 1, and the abutment portion 24 at the lower end abuts against the outer end surface 14 of the first part 1, that is, the bottom end. The hook 23 is subjected to a bidirectional force and cannot be separated from the slot 13, so that the first part 1 and the second part 2 are engaged with each other. Since the hook 23 fits tightly with the slot 13, the internal sealing of the first part 1 and the second part 2 is excellent, and as long as the hook 23 and the slot 13 are engaged in place, there will be no leakage in the shell. The above arrangement not only solves the problem of complex assembly process, but also avoids the risk of leakage during use.

[0030] The second part 2 in the present application includes a main body 25, a hook 23 protrudes from the edge of the main body 25, and an abutment portion 24 extends from the edge of the main body 25. The shape of the main body 25 can be a rectangular parallelepiped, a cube, a special shape or a trumpet shape. In the present application, it is a trumpet shape, similar to a mouthpiece, which is convenient for use. The cross section of the hook 23 can be a variety of shapes, such as a triangle, an ellipse or a special shape, as long as the protruding part can be hooked in the slot 13. In one embodiment, the hook 23 at least includes a first surface 231 and a second surface 232 adjacent to each other, and an angle is formed between the first surface 231 and the second surface 232, and the first surface 231 is parallel to the side wall 131 of the slot 13; the extension direction of the abutment portion 24 is perpendicular to the length direction of the main body 25, and is parallel to the outer end surface 14 of the first part 1. The hook 23 is located at the upper edge of the main body 25, which is convenient for the second part 2 to be inserted into the first part 1 for clamping.

[0031] The slot 13 in the present application includes side walls 131 located on opposite sides and a bottom 132 located between the two side walls 131; the filter assembly 100 is disposed in the slot 13 and abuts against one of the side walls 131 of the slot 13; when the hook 23 abuts against the filter assembly 100, the first surface 231 abuts against the other side wall 131 of the slot 13, so that the filter assembly 100 and the hook 23 are both stuck in the slot 13. The filter assembly 100 in the present application is placed in the slot 13, with the upper part abutting against the slot 13 and the lower part being abutted by the hook 23, so that the filter assembly 100 is relatively fixed and installed on the ventilation channel. The hook 23 is interference fit with the filter assembly 100. The filter assembly 100 will be slightly deformed when squeezed, and has a certain rebound force on the lower hook 23. The hook 23 is also stuck in the slot 13, and the lower part is abutted by the abutment part 24 and the first part 1, so that the hook 23 cannot move.

[0032] The sum of the thickness of the filter assembly 100 and the height of the hook 23 in the present application is greater than the height of the slot 13. The height of the slot 13 is the distance between the two opposite side walls 131 of the slot 13. When the first part 1 and the second part 2 are engaged, the filter assembly 100 and the hook 23 are both located in the slot 13. In order to make the hook 23 stuck in the slot 13, the sum of the thickness of the filter assembly 100 and the height of the hook 23 is set to be greater than the height of the slot 13. The filter assembly 100 is squeezed and deformed, so that the hook 23 is subjected to the rebound force of the filter assembly 100, so that the hook 23 is closely attached to the slot 13, and the first surface 231 of the hook 23 is physically sealed with the side wall 131 of the slot 13, so that after the first part 1 and the second part 2 are engaged, the gas entering from one end of the first part 1 can only flow out through one end of the second part 2 through the gas passage, thereby avoiding leakage at the connection.

[0033] The filter assembly 100 in the present application is made of elastic material. In one embodiment, the filter assembly 100 includes filter cotton, which is used to filter the gas in the passage, remove some germs and bacteria, and impurities in the air. The filter cotton can be made of fiber, non-woven fabric or activated carbon, and has a certain elasticity. When it is squeezed by the hook 23, it deforms and shrinks, forming a certain reverse force on the hook 23, thereby limiting the hook 23 in the slot 13, so that the first part 1 and the second part 2 are engaged to form a sealing structure.

[0034] The connection part between the hook 23 and the abutment part 24 in the present application is the outer wall 22 of the main body 25, and the connection part between the slot 13 and the outer end surface of the first part 1 is the inner wall 12 of the first part 1. The outer wall 22 of the main body 25 and the inner wall 12 of the first part 1 are interference fit. Specifically, the size of the outer wall 22 of the main body 25 in the present application is equal to or greater than the size of the inner wall 12 of the first part 1, so that when the main body 25 is engaged with the first part 1, the outer wall 22 of the main body 25 and the inner wall 12 of the first part 1 are interference fit, which is equivalent to providing a second sealing structure between the first part 1 and the second part 2, which cooperates with the first sealing structure formed by the clamped hook 23 and the slot 13 located at the upper part, to avoid air leakage caused by poor sealing in the shell. The above-mentioned two sealing structures can make the first part 1 and the second part 2 fully sealed. As long as the hook 23 is stuck in the preset position of the slot 13, the shell can be completely sealed, and the gas can only flow in the passage formed by the connection between the first cavity 11 and the second cavity 21. The inspection steps after assembly of other assembly methods are omitted, which greatly improves the production and assembly efficiency and reduces the cost.

[0035] The shell in the present application is made of PP, which is composed of polypropylene. Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a low density. It is one of the lightest types of all plastics and can be used to make breathing filters to meet the hardness and strength of the material while being light in weight.

[0036] When using the breathing filter of the utility model, the shell is fixedly assembled by adopting a mechanical structure, and the shells are mutually clamped. As long as they are assembled in place, they can be fully sealed, effectively avoiding leakage and the like, simplifying the production process and improving production efficiency.

[0037] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present utility model.

Claims

1. A breathing filter, characterized in that The breathing filter comprises a housing and a filter assembly, wherein the filter assembly is arranged in the housing; The housing comprises a first part and a second part, the first part is hollow inside to form a first cavity penetrating the first part, and a slot is provided on the inner wall; the second part is hollow inside to form a second cavity penetrating the second part, and a protruding hook and abutting part are provided on the outer wall, the first cavity is connected with the second cavity to form a passage, and the filter assembly is arranged on the passage; When the first part and the second part are installed, the hook is inserted into the slot, and the hook abuts against the filter assembly, and the abutting part abuts against the outer end surface of the first part, so that the first part and the second part are clamped together.

2. The breathing filter according to claim 1, characterized in that The second part includes a main body, the hook protrudes from the edge of the main body, and the abutment portion is formed by extending from the edge of the main body; The hook at least comprises a first surface and a second surface adjacent to each other, an angle is formed between the first surface and the second surface, and the first surface is parallel to the side wall of the slot; The extending direction of the abutting portion is perpendicular to the length direction of the main body and parallel to the outer end surface of the first portion.

3. The breathing filter according to claim 2, characterized in that The card slot includes side walls located at two opposite sides and a bottom located between the two side walls; The filter assembly is disposed in the slot and abuts against one of the side walls of the slot; when the hook abuts against the filter assembly, the first surface abuts against the other side wall of the slot, so that the filter assembly and the hook are both stuck in the slot.

4. The breathing filter according to claim 3, characterized in that The sum of the thickness of the filter assembly and the height of the hook is greater than the height of the slot.

5. The breathing filter according to claim 4, characterized in that The filter component is made of elastic material.

6. The breathing filter according to any one of claims 2 to 5, characterized in that: The connecting portion between the hook and the abutting portion is the outer wall of the main body, the connecting portion between the slot and the outer end surface of the first portion is the inner wall of the first portion, and the outer wall of the main body and the inner wall of the first portion are interference fit.

7. The breathing filter according to claim 6, characterized in that The size of the outer wall of the main body is equal to or greater than the size of the inner wall of the first portion.

8. The breathing filter according to claim 1, characterized in that The filter assembly includes filter cotton.

9. The breathing filter according to claim 1, characterized in that The material of the shell is PP.

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