Forehead adjusting support and breathing mask

Abstract

The forehead adjusting support comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are coaxial, one of the first connecting piece and the second connecting piece is hollow and provided with a limiting structure protruding inwards, and the other one of the first connecting piece and the second connecting piece is provided with a matching structure. And the two can axially and relatively move.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a forehead adjustment bracket and a breathing mask. Background Art

[0002] The main method for treating obstructive sleep apnea hypopnea syndrome is continuous positive airway pressure, which usually requires patients to wear a respiratory mask for a long time, so wearing comfort has a great impact on the patient's experience. Most respiratory masks are equipped with a forehead support. The forehead support rests on the patient's forehead, and the support provided by the forehead can be used to relieve the pressure of the respiratory mask on the face, and ensure the sealing between the respiratory mask and the patient's face to ensure the treatment effect.

[0003] In the related art, the forehead support is fixed on the breathing mask, and the patient can place the breathing mask on the face, and press the forehead support against the forehead, and then fix it through a headband or other fixing parts. However, due to differences in race, age and individual, the height of the forehead relative to the face may be different for different patients. Therefore, at present, the forehead support cannot meet the use needs of different patients and cannot make good contact with the foreheads of different patients, which will reduce the patient's wearing experience, and may also cause the breathing mask to be lifted up on the patient's face, resulting in poor sealing between the breathing mask and the patient's face, which may cause air leakage and affect the treatment effect. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a forehead adjustment bracket and a breathing mask, which can solve the problem in the related art that the breathing mask cannot meet the needs of different patients, which will reduce the patients' wearing experience and may also cause air leakage, thereby affecting the treatment effect.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] In the first aspect, an embodiment of the utility model provides a forehead adjustment bracket, which is applied to a breathing mask, comprising: a first connecting member and a second connecting member, the first connecting member and the second connecting member are coaxial, one of the first connecting member and the second connecting member is hollow inside and is provided with a limiting structure protruding inwardly, and the other is provided with a matching structure, the two can move axially relative to each other, and the first connecting member and the second connecting member cannot rotate relative to each other.

[0007] Optionally, the limiting structure and / or the matching structure extend along the first direction, and different positions of the limiting structure can be engaged with the matching structure, or the limiting structure can be engaged with different positions of the matching structure, so that the first connecting member and the second connecting member can move axially relative to each other;

[0008] The first direction is the axial direction of the first connecting member.

[0009] Optionally, a first through hole is provided on the first connecting member, and the first through hole extends along the first direction so that the first connecting member is hollow inside, and a latching tooth protruding inward is provided on the inner wall of the first through hole, and the number of the latching teeth is multiple, and the multiple latching teeth are spaced apart along the first direction, and the multiple latching teeth form the limiting structure;

[0010] The second connecting member is connected with a clamping strip, the clamping strip forms the matching structure, the clamping strip is passed through the first through hole, and the clamping strip can be clamped with the plurality of clamping teeth at different positions along the first direction;

[0011] Wherein, the clamping strip is an elastic clamping strip, or the clamping teeth are elastic clamping teeth.

[0012] Optionally, an operating member is connected to the second connecting member, and a mounting hole is also provided on the first connecting member, the axis of the mounting hole intersects with the first direction, and the mounting hole is connected to the first through hole, the operating member is embedded in the first through hole, and part of the operating member is exposed from the first through hole, and the mounting hole extends along the first direction.

[0013] Optionally, the clamping strip includes a main body and a clamping platform, one end of the main body is connected to the second connecting member, the clamping platform is connected to the other end of the main body, and the clamping platform protrudes from the surface of the main body facing the clamping teeth, and the clamping platform can be clamped with multiple clamping teeth at different positions along the first direction.

[0014] Optionally, a second through hole is provided on the second connecting member, and the second through hole extends along the first direction so that the interior of the second connecting member is hollow, and an inwardly protruding engaging tooth is provided on the inner wall of the second through hole, and the number of the engaging teeth is multiple, and the multiple engaging teeth are spaced apart along the first direction, and the multiple engaging teeth form the limiting structure;

[0015] The first connecting member is connected with a clamping strip, the clamping strip forms the matching structure, the clamping strip is passed through the second through hole, and the clamping strip can be clamped with the plurality of clamping teeth at different positions along the first direction;

[0016] Wherein, the clamping strip is an elastic clamping strip or the clamping teeth are elastic clamping teeth.

[0017] Optionally, the first connecting member is provided with a first through hole, the first through hole extends along the first direction so that the first connecting member is hollow inside, the inner wall of the first through hole is provided with a clamping groove, the clamping groove extends at intervals along the first direction, the bottom of the clamping groove is provided with a plurality of teeth protruding inwardly, and the plurality of teeth form the limiting structure;

[0018] The second connecting member is inserted into the first through hole, and a buckle is provided on the surface of the second connecting member facing the hole wall of the first through hole, the buckle forms the matching structure, and the buckle can be engaged with the plurality of teeth at different positions along the first direction;

[0019] Wherein, the teeth are elastic teeth, or the buckle is an elastic buckle.

[0020] Optionally, a first through hole is provided on the first connecting member, the first through hole extends along the first direction so that the first connecting member is hollow inside, and a clamping groove is provided on the inner wall of the first through hole, the clamping groove forms the matching structure;

[0021] The second connecting member is passed through the first through hole, and a plurality of inwardly protruding snap buckles are arranged on the surface of the second connecting member facing the hole wall of the first through hole, and the plurality of snap buckles are arranged at intervals along the first direction, and the plurality of snap buckles form the limiting structure, and the snap groove can be snapped with the plurality of snap buckles at different positions along the first direction;

[0022] Wherein, the snap buckle is an elastic snap buckle.

[0023] Optionally, the first connecting member is provided with a first through hole and a plurality of first clamping holes, the first through hole penetrates the first connecting member along the first direction so that the first connecting member is hollow, the first clamping hole penetrates the first connecting member along the second direction, the second connecting member is embedded in the first through hole, the second connecting member is provided with a second clamping hole, the second clamping hole penetrates the second connecting member along the second direction, the second clamping hole forms the matching structure, and the second clamping hole is opposite to a first clamping hole among the plurality of first clamping holes;

[0024] The first clamping hole is provided with a fixing piece protruding inwardly, the fixing piece is connected to the hole wall of the first clamping hole, the fixing piece forms the limiting structure, and the second clamping hole can be clamped with one of the plurality of fixing pieces along the first direction;

[0025] The second direction intersects with the first direction.

[0026] In the second aspect, an embodiment of the utility model also provides a breathing mask, comprising: a frame, a forehead support and a forehead adjustment bracket as described in any one of the first aspects above, wherein the first connecting member is fixed to the frame, and the second connecting member is fixed to the forehead support to adjust the distance between the forehead support and the frame.

[0027] Optionally, the breathing mask also includes an elastic forehead pad, a mounting hole is provided on the surface of the forehead support facing away from the second connecting member, the mounting hole penetrates the forehead support along a first direction, and a mounting piece is provided on the surface of the forehead pad facing the forehead support, and the mounting piece is embedded in the mounting hole.

[0028] In an embodiment of the utility model, the forehead adjustment bracket includes: a first connecting member and a second connecting member, the first connecting member and the second connecting member are coaxial, and one of the first connecting member and the second connecting member is hollow inside. Therefore, when the first connecting member is hollow, the second connecting member can be arranged inside the first connecting member, and when the second connecting member is hollow, the first connecting member can be arranged inside the second connecting member to achieve the connection between the first connecting member and the second connecting member. One of the first connecting member and the second connecting member that is hollow inside is also provided with a limiting structure protruding inward, and the other is provided with a matching structure. Therefore, the first connecting member and the second connecting member can be connected through the limiting structure and the matching structure. Since the first connecting member and the second connecting member can move axially relative to each other, the connection position between the first connecting member and the second connecting member can be changed. When the forehead adjustment bracket provided by the embodiment of the utility model is applied to a respiratory mask, one of the first connecting member and the second connecting member can be arranged on the forehead support member, and the position of the forehead support member of the respiratory mask can be adjusted by adjusting the connection position between the first connecting member and the second connecting member. When the patient wears the breathing mask, the forehead support can contact the patient's forehead. Since the position of the forehead support is adjustable, it can adapt to the different forehead heights of the patient and can be suitable for different patients. On the one hand, it can improve the patient's wearing experience. On the other hand, it can also prevent the forehead support from having poor contact with the patient's forehead, causing the part of the frame that fits the patient's face to not fit tightly, affecting the sealing effect of the breathing mask, and preventing air leakage when the breathing mask is used for treatment, thereby improving the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a breathing mask provided by an embodiment of the utility model;

[0030] Figure 2 It is an exploded view of a breathing mask provided by an embodiment of the utility model;

[0031] Figure 3 It is an exploded view of the connection between a frame and a forehead support provided by an embodiment of the utility model;

[0032] Figure 4 It is a cross-sectional view of a frame, a forehead support member and a forehead pad provided by an embodiment of the utility model in a state where they are not connected;

[0033] Figure 5 It is a cross-sectional view of the connection between a frame, a forehead support and a forehead pad provided by an embodiment of the utility model;

[0034] Figure 6 It is a cross-sectional view of another connection between a frame and a forehead support provided by an embodiment of the utility model.

[0035] Description of reference numerals:

[0036] 100: forehead adjustment member; 10: frame; 20: forehead support member; 11: first connecting member; 21: second connecting member; 12: limiting structure; 22: matching structure; 111: first through hole; 112: latching tooth; 212: clamping strip; 30: operating member; 113: mounting hole; 114: first clamping hole; 213: second clamping hole; 40: fixing member; 50: forehead pad; 23: mounting through hole; 51: mounting member; 60: pad; 2121: body; 2122: clamping platform; 200: breathing mask. DETAILED DESCRIPTION

[0037] 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 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.

[0038] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present utility model can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0039] The forehead adjustment bracket 100 and the breathing mask 200 provided by the embodiment of the utility model are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0040] like Figures 1 to 6As shown, the forehead adjustment bracket includes: the forehead adjustment bracket includes a first connecting member 11 and a second connecting member 21, the first connecting member 11 and the second connecting member 21 are coaxial, one of the first connecting member 11 and the second connecting member 21 is hollow inside and is provided with a limiting structure 12 protruding inwardly, and the other is provided with a matching structure 22, the two can move axially relative to each other, and the first connecting member and the second connecting member cannot rotate relative to each other. Among them, the forehead adjustment bracket is applied to a breathing mask 200.

[0041] In the embodiment of the utility model, the forehead adjustment bracket includes: a first connecting member 11 and a second connecting member 21, the first connecting member 11 and the second connecting member 21 are coaxial, and one of the first connecting member 11 and the second connecting member 21 is hollow inside. Therefore, when the first connecting member 11 is hollow, the second connecting member 21 can be arranged inside the first connecting member 11, and when the second connecting member 21 is hollow, the first connecting member 11 can be arranged inside the second connecting member 21 to achieve the connection between the first connecting member 11 and the second connecting member 21. One of the first connecting member 11 and the second connecting member 21 that is hollow inside is also provided with a limiting structure 12 protruding inwardly, and the other is provided with a matching structure 22. Therefore, the first connecting member 11 and the second connecting member 21 can be connected through the limiting structure 12 and the matching structure 22. Since the first connecting member 11 and the second connecting member 21 can move relative to each other axially, the connection position between the first connecting member 11 and the second connecting member 21 can be changed. When the forehead adjustment bracket provided by the embodiment of the utility model is applied to the respiratory mask 200, one of the first connecting member 11 and the second connecting member 21 can be set on the forehead support member 20, and the position of the forehead support member 20 of the respiratory mask 200 can be adjusted by adjusting the connection position between the first connecting member 11 and the second connecting member 21. When the patient wears the respiratory mask 200, the forehead support member 20 can contact the forehead position of the patient. Since the position of the forehead support member 20 is adjustable, it can adapt to the different forehead heights of the patient and can be suitable for different patients to wear. On the one hand, it can improve the wearing experience of the patient, and on the other hand, it can also prevent the poor contact effect between the forehead support member 20 and the patient's forehead, so that the part of the frame 10 that fits the patient's face is not tightly fitted, affecting the sealing effect of the respiratory mask 200, and the problem of air leakage occurs when the respiratory mask 200 is used for treatment, thereby improving the treatment effect.

[0042] In addition, in some embodiments, Figure 1 , Figure 2 , Figure 3 , Figure 5As shown, the limiting structure 12 and / or the matching structure 22 extend along the first direction, and different positions of the limiting structure 12 can be engaged with the matching structure 22, or the limiting structure 12 can be engaged with different positions of the matching structure 22, so that the first connecting member 11 and the second connecting member 21 can move axially relative to each other, wherein the first direction is the axial direction of the first connecting member 11.

[0043] The limiting structure 12 and / or the matching structure 22 extend along the first direction. When the limiting structure 12 extends along the first direction, different positions of the limiting structure 12 can be engaged with the matching structure 22 to enable the first connecting member 11 to move relative to the second connecting member 21; when the matching structure 22 extends along the first direction, the limiting structure 12 can be engaged with different positions of the matching structure 22 to enable the first connecting member 11 to move relative to the second connecting member 21, thereby adjusting the distance between the forehead support 20 and the frame 10 in the first direction.

[0044] It should be noted that when the limiting structure 12 and the matching structure 22 both extend along the first direction, multiple positions of the limiting structure 12 can be simultaneously engaged with multiple positions of the matching structure 22, and the first connecting member 11 and the second connecting member 21 can be movably connected. At this time, since multiple positions of the limiting structure 12 can be simultaneously engaged with multiple positions of the matching structure 22, there are more engaging positions between the limiting structure 12 and the matching structure 22, which can make the engaging position between the limiting structure 12 and the matching structure 22 stable, and can avoid the problem of engaging failure between the limiting structure 12 and the matching structure 22.

[0045] The limiting structure 12 and the matching structure 22 may have different structural settings, and the following four settings are specifically described as examples:

[0046] Method 1: If Figure 4 , Figure 5 As shown, a first through hole 111 is provided on the first connecting member 11, and the first through hole 111 extends along the first direction so that the interior of the first connecting member 11 is hollow. A latching tooth 112 protruding inward is provided on the inner wall of the first through hole 111. There are multiple latching teeth 112, and the multiple latching teeth 112 are spaced apart along the first direction, and the multiple latching teeth 112 form a limiting structure 12; a clamping strip 212 is connected to the second connecting member 21, and the clamping strip 212 forms a matching structure 22. The clamping strip 212 is passed through the first through hole 111, and the clamping strip 212 can be clamped with the multiple latching teeth 112 at different positions along the first direction; wherein, the clamping strip 212 is an elastic clamping strip 212, or the latching tooth 112 is an elastic latching tooth 112.

[0047] A first through hole 111 is provided on the first connecting member 11, and the first through hole 111 extends along the first direction. A latching tooth 112 is provided on the inner wall of the first through hole 111, and the latching tooth 112 can form a limiting structure 12; a clamping strip 212 is connected to the second connecting member 21, and the clamping strip 212 forms a matching structure 22. The clamping strip 212 can penetrate the first through hole 111 and be clamped with the latching tooth 112 on the hole wall of the first through hole 111 to connect the first connecting member 11 and the second connecting member 21. Since there are multiple latch teeth 112, and the multiple latch teeth 112 are spaced apart along the first direction, when the first connector 11 moves relative to the second connector 21 along the first direction, the latch strip 212 also moves relative to the multiple latch teeth 112, so that the latch strip 212 can be engaged with the latch teeth 112 at different positions among the multiple latch teeth 112, so that the connection position between the first connector 11 and the second connector 21 is changed, so that the distance between the forehead support 20 and other components on the respiratory mask 200 can be adjusted, and the position of the forehead support 20 can be adjusted. When the patient wears the respiratory mask 200, the second connector 21 can be adjusted according to the position of his forehead, so that the latch strip 212 is engaged with different latch teeth 112, so that the distance between the forehead support 20 and the patient's forehead can be adjusted to adapt to different patients.

[0048] The clip strip 212 is an elastic clip strip 212, or the clip teeth 112 are elastic clip teeth 112, that is, one of the clip strip 212 and the clip teeth 112 is elastic. In the case where the clip strip 212 is an elastic clip strip 212, when the clip strip 212 moves in the first through hole 111, the clip teeth 112 can squeeze the clip strip 212, so that the clip strip 212 is compressed. When the clip strip 212 moves into the gap between the multiple clip teeth 112, the clip teeth 112 cancel the squeezing of the clip strip 212, and the clip strip 212 can at least partially restore its original state. At this time, the surface of the clip teeth 112 can block the clip strip 212 to prevent the clip strip 212 from moving in the first through hole 111, that is, the clip strip 212 can be engaged with the two adjacent clip teeth 112, so that the positions of the first connecting member 11 and the second connecting member 21 are relatively fixed to meet the wearing needs of the patient. When the patient needs to adjust the distance between the forehead support 20 and the frame 10, a force can be applied to the first connecting member 11, and the surface of the latching tooth 112 squeezes the latching strip 212, so that the latching strip 212 is deformed and the latching strip 212 can move in the first through hole 111. In the case where the latching tooth 112 is an elastic latching tooth 112, when the latching strip 212 moves in the first through hole 111, the latching strip 212 can squeeze the latching tooth 112 in contact with it, so that the latching tooth 112 is compressed. At this time, the latching strip 212 can pass through the position where the latching tooth 112 is located. After adjusting the latching strip 212 to a suitable position, the latching strip 212 can be located in the gap between two latching teeth 112 among the multiple latching teeth 112. At this time, the latching strip 212 cancels the squeezing of the latching tooth 112, and the surface of the latching tooth 112 can block the latching strip 212 to prevent the latching strip 212 from moving in the first through hole 111, so that the positions of the first connecting member 11 and the second connecting member 21 are relatively fixed to meet the wearing needs of the patient. When the patient needs to adjust the distance between the forehead support 20 and the frame 10, force can be applied to the first connecting member 11. At this time, the clamping strip 212 can squeeze the clamping teeth 112 again, causing the clamping teeth 112 to deform, so that the clamping strip 212 can move in the first through hole 111 and engage with the clamping teeth 112 at other positions.

[0049] It should be noted that, when the clip strip 212 is elastic, the clip strip 212 can be made of materials such as rubber, latex, and silicone. Similarly, when the clip teeth 112 are elastic, the clip teeth 112 can also be made of materials such as rubber, latex, and silicone. In addition, the elasticity of the clip strip can also be achieved by making it with other materials with less elasticity in a certain structure. For example, it can be made of plastic, and holes can be set inside the plastic so that the plastic has a certain deformation ability. Alternatively, it can be made into a structure as shown in the figure, in which the clip strip is inclined relative to the axis of the second connecting member, and the end of the clip strip has a protrusion away from the axis of the second connecting member. The specific material and structure of the clip strip are not specifically limited in the embodiments of the utility model.

[0050] It should also be noted that the first through hole 111 can be a rectangular hole, and the rectangular hole has a first hole wall and a second hole wall relative to each other. In this case, the latching teeth 112 can be arranged on the first hole wall and the second hole wall, and the number of the corresponding latching strips 212 can also be 2, and the two latching strips 212 can be spaced and distributed along the direction from the first hole wall to the second hole wall, and the two latching strips 212 can be respectively engaged with the latching teeth 112 on the first hole wall and the latching teeth 112 on the second hole wall; between the first hole wall and the second hole wall, the rectangular hole can also have a third hole wall and a fourth hole wall relative to each other. In this case, the latching teeth 112 can be arranged on the third hole wall and the fourth hole wall, and the number of the corresponding latching strips 212 can also be 2, and the two latching strips 212 can be spaced and distributed along the direction from the third hole wall to the fourth hole wall, and the two latching strips 212 can be respectively engaged with the latching teeth 112 on the third hole wall and the latching teeth 112 on the fourth hole wall; or, the latching teeth 112 can also be arranged in other ways, for example, they can be arranged only on one of the hole walls, or they can be arranged on four hole walls, and the latching strips 212 can correspond to the arrangement positions of the latching teeth 112. Of course, the first through hole 111 can also be a hole of other shapes, for example, it can be an elliptical hole, a hexagonal hole, a circular hole, etc. The shape of the first through hole 111 is not specifically limited in the embodiment of the utility model.

[0051] In addition, the first through hole 111 can penetrate the first connecting member 11 along the first direction. At this time, the second connecting member 21 can be moved from one end of the first connecting member 11 to the other end, so that the connection range between the first connecting member 11 and the second connecting member 21 is larger, thereby making the position adjustment range of the forehead support member 20 larger. Of course, the first through hole 111 may not penetrate the first connecting member 11, and this is not specifically limited in the embodiment of the utility model.

[0052] In addition, in some embodiments, Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, an operating member 30 can be connected to the second connecting member 21, and a mounting hole 113 is also provided on the first connecting member 11. The axis of the mounting hole 113 intersects with the first direction, and the mounting hole 113 is connected to the first through hole 111. The operating member 30 is embedded in the first through hole 111, and part of the operating member 30 is exposed in the first through hole 111, and the mounting hole 113 extends along the first direction.

[0053] An operating member 30 is connected to the second connecting member 21, and a mounting hole 113 is also provided on the first connecting member 11. The axis of the mounting hole 113 intersects with the first direction, so that the mounting hole 113 can extend from the surface of the first connecting member 11 to the first through hole 111 and is connected to the first through hole 111. At this time, the part of the second connecting member 21 on which the operating member 30 is provided can also be located in the first through hole 111, so that the operating member 30 is embedded in the first through hole 111. Since part of the operating member 30 is exposed to the first through hole 111, the operating member 30 can be exposed to the first connecting member 11, and the first connecting member 11 is in an easy-to-operate state. The patient can operate the second connecting member 21 to move through the first connecting member 11 to move the clamping strip 212 relative to the multiple clamping teeth 112, so that the patient can adjust the distance between the frame 10 and the forehead support 20.

[0054] Among them, the second connecting member 21 is located in the first through hole 111, and the second connecting member 21 can also abut against the hole wall of the first through hole 111. At this time, there are more connecting parts between the first connecting member 11 and the second connecting member 21, so that the connection relationship between the first connecting member 11 and the second connecting member 21 is relatively stable, and the hole wall of the first through hole 111 can also limit the movement of the second connecting member 21, which can avoid that only the clamping strip 212 is located in the first through hole 111 and clamped with the clamping tooth 112, and the second connecting member 21 is easy to squeeze the clamping strip 212, so that the second connecting member 21 moves in other directions.

[0055] It should be noted that, when the shape of the first through hole 111 is a rectangle, the shape of the second connecting member 21 can correspond to the first through hole 111, and the shape of the second connecting member 21 can also be a rectangle. In this case, the second connecting member 21 has four surfaces, and the operating member 30 can be set on any one of the four surfaces. The mounting hole 113 can be set according to the position of the operating member 30, and is connected to the first through hole 111 on the corresponding hole wall that passes through the first through hole 111.

[0056] It should also be noted that the second direction can be perpendicular to the first direction. In this case, the axis of the mounting hole 113 is perpendicular to the axis direction of the first through hole 111, which can facilitate the installation of the mounting hole 113 on the first connector 11 and make the mounting hole 113 communicate with the first through hole 111. The hole wall of the mounting hole 113 can limit the movement of the operating member 30 in the first direction. For example, when the operating member 30 moves along the first direction to abut against the hole wall of the mounting hole 113, the hole wall of the mounting hole 113 can block the operating member 30 and limit the movement of the operating member 30 in the direction away from the axis of the mounting hole 113, which can avoid the second connector 21 from moving too much, the clamping strip 212 is separated from the clamping tooth 112, and then the first connector 11 is disconnected from the second connector 21. Of course, the second direction can also have other angles with the first direction, for example, 70°, 80°, 85°, 76°, etc. The specific angle between the second direction and the first direction is not specifically limited in the embodiment of the utility model.

[0057] In order to make the hole wall of the mounting hole 113 have a better limiting effect on the movement of the operating member 30 in the first direction, in the first direction, the surface of the operating member 30 and the shape of the hole wall of the mounting hole 113 can correspond to each other, so that the operating member 30 and the hole wall of the mounting hole 113 can be tightly abutted.

[0058] In order to avoid the setting of the mounting hole 113 affecting the adjustment range of the distance between the forehead support 20 and the frame 10, in the first direction, the distance between two relative positions in the hole wall of the mounting hole 113 can be greater than or equal to the length of the multiple latch teeth 112 in the first direction, and when the operating member 30 is in the extreme position (the operating member 30 abuts against the hole wall of the mounting hole 113), the clamping strip 212 can be located in the gap between the two edgemost latch teeth 112 or outside the multiple latch teeth 112, so that when the operating member 30 moves in the mounting hole 113, the clamping strip 212 can be clamped with each position of the multiple latch teeth 112.

[0059] In addition, in some embodiments, the operating member 30 and the second connecting member 21 can be an integrally formed structure, or the operating member 30 can be detachably connected to the second connecting member 21, or the operating member 30 can be fixed to the second connecting member 21. The specific molding and setting method of the operating member 30 is not specifically limited in the embodiments of the utility model.

[0060] In addition, in some embodiments, Figure 4As shown, the clamping strip 212 includes a main body 2121 and a clamping platform 2122. One end of the main body 2121 is connected to the second connecting member 21, and the clamping platform 2122 is connected to the other end of the main body 2121. The clamping platform 2122 protrudes from the surface of the main body 2121 facing the clamping teeth 112. The clamping platform 2122 can be clamped with multiple clamping teeth 112 at different positions along the first direction.

[0061] The clamping strip 212 includes a body 2121 and a clamping platform 2122. One end of the body 2121 is connected to the second connecting member 21, and the clamping platform 2122 is connected to the other end of the body 2121. Since the clamping platform 2122 protrudes from the surface of the body 2121 facing the clamping teeth 112, the clamping platform 2122 can be clamped with the clamping teeth 112. That is, one end of the clamping strip 212 is connected to the second connecting member 21, and the other end of the clamping strip 212 is a free end and has a clamping platform 2122 facing the clamping teeth 112. When the second connecting member 21 moves, the clamping platform 2122 can move relative to the plurality of clamping teeth 112 to clamp with the plurality of clamping teeth 112 at different positions, thereby realizing the clamping connection between the clamping strip 212 and the clamping teeth 112.

[0062] Method 2: A second through hole is provided on the second connecting member 21, and the second through hole extends along the first direction so that the interior of the second connecting member 21 is hollow. A latching tooth protruding inward is provided on the inner wall of the second through hole. There are multiple latching teeth, and the multiple latching teeth are spaced apart along the first direction, and the multiple latching teeth form a limiting structure 12; a latching strip is connected to the first connecting member 11, and the latching strip forms a matching structure 22. The latching strip is passed through the second through hole, and the latching strip can be latched with the multiple latching teeth at different positions along the first direction; wherein the latching strip is an elastic latching strip or the latching teeth are elastic latching teeth.

[0063] The second connecting member 21 is provided with a second through hole, the second through hole extends along the first direction, and a snap-on tooth is provided on the inner wall of the second through hole, and the snap-on tooth can form a matching structure 22; the first connecting member 11 has a second mounting surface facing the forehead support member 20, and a snap-on strip is connected to the second mounting surface, and the snap-on strip forms a limiting structure 12, and the snap-on strip can be passed through the second through hole and snap-on with the snap-on portion on the hole wall of the second through hole to connect the first connecting member 11 and the second connecting member 21. Since there are multiple snap-on teeth, and the multiple snap-on teeth are spaced apart along the first direction, when the first connecting member 11 moves relative to the second connecting member 21 along the first direction, the snap-on strip will also move relative to the multiple snap-on teeth, so that the snap-on strip can snap-on with the snap-on teeth at different positions among the multiple snap-on teeth, so that the connection position of the first connecting member 11 and the second connecting member 21 is changed, so that the distance between the forehead support member 20 and the frame 10 can be adjusted. When the patient wears the breathing mask 200, the second connecting member 21 can be adjusted according to the position of the patient's forehead, so that the engaging teeth move relative to the engaging strip, so that the engaging strip engages with different engaging teeth, so that the distance between the forehead support 20 and the patient's forehead can be adjusted to adapt to different patients.

[0064] The clamping strip is an elastic clamping strip, or the clamping teeth are elastic clamping teeth, that is, one of the clamping strip and the clamping teeth is elastic. For the specific clamping method of the clamping strip and the clamping teeth, please refer to the above description of the clamping strip 212 and the clamping teeth 112, and the embodiment of the utility model will not be repeated here. The clamping strip or the clamping teeth can be made of elastic materials.

[0065] It should be noted that the structure of the card strip can be the same or similar to that of the card strip 212, and the card strip can also have one end connected to the first connecting member 11 and one end as a free end for connecting with the card teeth. For details, please refer to the above description of the card strip 212, and the embodiments of the utility model will not be repeated here.

[0066] Method three: A first through hole 111 is provided on the first connecting member 11, and the first through hole 111 extends along the first direction, and the interior of the first connecting member 11 is hollow. A card slot is provided on the inner wall of the first through hole 111, and the card slot extends at intervals along the first direction. A plurality of teeth are provided at the bottom of the card slot, and the teeth form a limiting structure 12; the second connecting member 21 is passed through the first through hole 111, and a buckle is provided on the surface of the hole wall of the second connecting member 21 facing the first through hole 111, and the buckle forms a matching structure 22, and the buckle can be engaged with the plurality of teeth at different positions along the first direction; wherein the teeth are elastic teeth, or the buckle is an elastic buckle.

[0067] The first connecting member 11 is provided with a first through hole 111 extending in the first direction, and a card slot is provided on the inner wall of the first through hole 111, and the card slot extends at intervals in the first direction, and a plurality of teeth are provided at the bottom of the card slot, and the teeth can form a limiting structure 12; the second connecting member 21 is passed through the first through hole 111, and a buckle is provided on the surface of the second connecting member 21 facing the hole wall of the first through hole 111, and the buckle on the surface of the second connecting member 21 can form a matching structure 22. That is, the matching structure 22 is directly provided on the surface of the second connecting member 21, the limiting structure 12 is provided on the hole wall of the first through hole 111, and the second connecting member 21 is passed through the first through hole 111, so that the buckle can be engaged with the teeth in the card slot to achieve the connection between the second connecting member 21 and the first connecting member 11. When the first connecting member 11 moves relative to the second connecting member 21 in the first direction, the buckle also moves relative to the plurality of teeth, so that the snap-on strip can snap-on with teeth at different positions among the plurality of teeth, so that the connection position between the first connecting member 11 and the second connecting member 21 is changed, so that the distance between the forehead support member 20 and the frame 10 can be adjusted. When the patient wears the respiratory mask 200, the second connecting member 21 can be adjusted according to the position of the patient's forehead, so that the buckle moves relative to the plurality of teeth, so that the buckle can snap-on with different teeth, so that the distance between the forehead support member 20 and the patient's forehead can be adjusted to accommodate different patients.

[0068] The buckle is an elastic buckle strip, or the teeth are elastic teeth, that is, one of the buckle and the teeth is elastic. For the specific buckling method of the buckle and the teeth, please refer to the above description of the buckle strip 212 and the teeth 112, and the embodiment of the utility model will not be repeated here. The buckle strip or the buckle teeth can be made of elastic materials.

[0069] It should be noted that in addition to the above-mentioned teeth forming the limiting structure 12 and the buckle forming the matching structure 22, a buckle can also be set to form the limiting structure 12 and the teeth forming the matching structure 22. Specifically, a buckle can be set on the inner wall of the first through hole 111 to form the limiting structure 12, and a clamping groove is set on the surface of the hole wall of the second connecting member 21 facing the first through hole 111, so that the clamping groove extends along the first direction, and a plurality of clamping teeth 112 are set at the bottom of the groove, and the plurality of clamping teeth 112 form the matching structure 22. At this time, the buckle acts as a limiting structure 12 to clamp the clamping teeth 112 at different positions.

[0070] Method four: A first through hole 111 is provided on the first connecting member 11, and the first through hole 111 penetrates the first connecting member 11 along the first direction. A snap-in groove is provided on the inner wall of the first through hole 111, and the snap-in groove forms a matching structure 22; the second connecting member 21 is penetrated through the first through hole 111, and a plurality of snap-in buckles are provided on the surface of the hole wall of the second connecting member 21 facing the first through hole 111, and the plurality of snap-in buckles are arranged at intervals along the first direction, and the plurality of snap-in buckles form a limiting structure 12, and the snap-in groove can be snap-connected with the plurality of snap-in buckles at different positions along the first direction; wherein the snap-in buckles are elastic snap-in buckles.

[0071] The first connecting member 11 is provided with a first through hole 111 penetrating the first connecting member 11 along the first direction, and a snap-fit ​​groove is provided on the inner wall of the first through hole 111, and the snap-fit ​​groove can form a matching structure 22; the second connecting member 21 is provided through the first through hole 111, and a plurality of snap-fit ​​buckles are provided on the surface of the second connecting member 21 facing the hole wall of the first through hole 111, and the plurality of snap-fit ​​buckles can form a limiting structure 12. That is, the limiting structure 12 is directly provided on the surface of the second connecting member 21, and the limiting structure 12 extends along the first direction, the matching structure 22 is provided on the hole wall of the first through hole 111, and the second connecting member 21 is provided through the first through hole 111, so that different snap-fit ​​buckles can be snap-fitted with the snap-fit ​​grooves to realize the connection between the second connecting member 21 and the first connecting member 11. When the first connecting member 11 moves relative to the second connecting member 21 in the first direction, the snap-in slot also moves relative to the plurality of snap-in buckles, so that different snap-in buckles among the plurality of snap-in buckles can be embedded in the snap-in slot, so that the snap-in slot can snap-in with snap-in buckles at different positions among the plurality of snap-in buckles, so that the connection position between the first connecting member 11 and the second connecting member 21 is changed, so that the distance between the forehead support member 20 and the frame 10 can be adjusted. When the patient wears the respiratory mask 200, the second connecting member 21 can be adjusted according to the position of the patient's forehead, so that the plurality of snap-in buckles move relative to the snap-in slot, so that different snap-in buckles can snap-in with the snap-in slot, so that the distance between the forehead support member 20 and the patient's forehead can be adjusted to accommodate different patients.

[0072] It should be noted that in addition to the above-mentioned snap-fit ​​groove forming the matching structure 22 and the snap-fit ​​buckle forming the limiting structure 12, a snap-fit ​​buckle can also be set to form the matching structure 22 and the snap-fit ​​groove forming the limiting structure 12. Specifically, a plurality of snap-fit ​​buckles can be set on the inner wall of the first through hole 111, and the plurality of snap-fit ​​buckles form the matching structure 22. A snap-fit ​​groove is set on the surface of the hole wall of the second connecting member 21 facing the first through hole 111. At this time, the snap-fit ​​groove can be used as the limiting structure 12 to snap into different snap-fit ​​buckles among the plurality of snap-fit ​​buckles.

[0073] In addition, the first connecting member 11 and the second connecting member 21 can also be movably connected in other ways, for example: Figure 6As shown, the first connecting member 11 may be provided with a first through hole 111 and a plurality of first snap-in holes 114, the first through hole 111 penetrates the first connecting member 11 along the first direction, the first snap-in hole 114 penetrates the first connecting member 11 along the second direction, the second connecting member 21 is embedded in the first through hole 111, the second connecting member 21 is provided with a second snap-in hole 213, the second snap-in hole 213 penetrates the second connecting member 21 along the second direction, the second snap-in hole 213 is opposite to a first snap-in hole 114 among the plurality of first snap-in holes 114; the first snap-in hole 114 is provided with an inwardly protruding fixing member 40, the fixing member 40 is connected to the hole wall of the first snap-in hole 114, the fixing member 40 forms a limiting structure, the second snap-in hole 213 can be snap-connected with one of the plurality of fixing members 40 along the first direction; wherein the second direction intersects with the first direction.

[0074] That is, the second connecting member 21 can be embedded in the first connecting member 11, and the first connecting member 11 is provided with a plurality of first snap-in holes 114, and the second connecting member 21 is provided with a second snap-in hole 213. Since the first snap-in holes 114 and the second snap-in holes 213 both extend along the second direction, the axis of the second snap-in hole 213 is colinear or parallel with the axis of the plurality of first snap-in holes 114. When the first connecting member 11 and the second connecting member 21 are connected, the second connecting member 21 can be moved so that the second snap-in hole 213 is opposite to the position of one of the plurality of first snap-in holes 114. At this time, the fixing member 40 on the corresponding first snap-in hole 114 can be passed through the second snap-in hole 213, and the fixing member 40 can limit the movement of the second connecting member 21 in the first direction, so that the second connecting member 21 is relatively fixed to the first connecting member 11, so as to be used for the use of the breathing mask 200.

[0075] It should be noted that the fixing member 40 can be detachably connected to the first clamping hole 114. For example, the first clamping hole 114 can be a threaded hole, and threads can be provided on the outer surface of the fixing member 40. When it is necessary to adjust the position of the second connecting member 21, the fixing member 40 can be removed, so that after adjusting the position of the second connecting member 21 so that the second clamping hole 213 is positioned opposite to one of the first clamping holes 114, the fixing member 40 is set to pass through the first clamping hole 114 and the second clamping hole 213. Alternatively, the fixing member 40 can be a pin, and the pin is detachably connected to the first clamping hole 114. In order to facilitate the removal of the pin, the pin can be a conical pin. In the above two methods, the fixing member 40 can be exposed to the first connecting member 11 to facilitate the removal of the fixing member 40. Figure 6As shown. Alternatively, the fixing member 40 can also be fixed in the first clamping hole 114, and the number of the fixing members 40 is also multiple, and each first clamping hole 114 is provided with a fixing member 40. In this case, the fixing member 40 can be elastic, and the surface of the second connecting member 21 can apply force to the elastic fixing member 40, so that the fixing member 40 is deformed, so that the second connecting member 21 moves in the first through hole 111. When the second clamping hole 213 is opposite to one of the first clamping holes 114, the fixing member 40 in the first clamping hole 114 recovers its deformation and extends into the second clamping hole 213, so as to realize the connection between the second connecting member 21 and the first connecting member 11.

[0076] Of course, the movable connection between the first connecting member 11 and the second connecting member 21 can also be achieved by other structures. For example, a telescopic rod that can be extended and retracted along a first direction can be provided, so that one end of the telescopic rod is connected to the frame 10, and the other end of the telescopic rod is connected to the forehead support 20. When the distance between the forehead support 20 and the frame 10 needs to be adjusted, the telescopic rod can be operated to extend or shorten. The structure of the telescopic rod can be similar to the adjustable antenna of a radio. The specific structure of the telescopic rod is not specifically limited in the embodiment of the utility model.

[0077] In the embodiment of the utility model, the forehead adjustment bracket includes: a first connecting member 11 and a second connecting member 21, the first connecting member 11 and the second connecting member 21 are coaxial, and one of the first connecting member 11 and the second connecting member 21 is hollow inside. Therefore, when the first connecting member 11 is hollow, the second connecting member 21 can be arranged inside the first connecting member 11, and when the second connecting member 21 is hollow, the first connecting member 11 can be arranged inside the second connecting member 21 to achieve the connection between the first connecting member 11 and the second connecting member 21. One of the first connecting member 11 and the second connecting member 21 that is hollow inside is also provided with a limiting structure 12 protruding inwardly, and the other is provided with a matching structure 22. Therefore, the first connecting member 11 and the second connecting member 21 can be connected through the limiting structure 12 and the matching structure 22. Since the first connecting member 11 and the second connecting member 21 can move relative to each other axially, the connection position between the first connecting member 11 and the second connecting member 21 can be changed. When the forehead adjustment bracket provided by the embodiment of the utility model is applied to the respiratory mask 200, one of the first connecting member 11 and the second connecting member 21 can be set on the forehead support member 20, and the position of the forehead support member 20 of the respiratory mask 200 can be adjusted by adjusting the connection position between the first connecting member 11 and the second connecting member 21. When the patient wears the respiratory mask 200, the forehead support member 20 can contact the forehead position of the patient. Since the position of the forehead support member 20 is adjustable, it can adapt to the different forehead heights of the patient and can be suitable for different patients to wear. On the one hand, it can improve the wearing experience of the patient, and on the other hand, it can also prevent the poor contact effect between the forehead support member 20 and the patient's forehead, so that the part of the frame 10 that fits the patient's face is not tightly fitted, affecting the sealing effect of the respiratory mask 200, and the problem of air leakage occurs when the respiratory mask 200 is used for treatment, thereby improving the treatment effect.

[0078] In addition, an embodiment of the utility model also provides a breathing mask 200, comprising: a frame 10, a forehead support 20 and a forehead adjustment bracket in any of the above embodiments, wherein the first connecting member 11 is fixed to the frame 10, and the second connecting member 21 is fixed to the forehead support 20 to adjust the distance between the forehead support 20 and the frame 10.

[0079] The breathing mask 200 includes a frame 10 and a forehead support 20, a first connecting member 11 is fixed on the frame 10, and a second connecting member 21 is fixed on the forehead support 20, and the first connecting member 11 is connected to the second connecting member 21. Since the first connecting member 11 can move relative to the second connecting member 21, the first connecting member 11 or the second connecting member 21 can be adjusted to change the connection position between the first connecting member 11 and the second connecting member 21, so that the distance between the forehead support 20 and the frame 10 in the first direction can be adjusted. When the patient wears the breathing mask 200, part of the frame 10 can fit against the patient's face, and the forehead support 20 can contact the patient's forehead. The distance between the forehead support 20 and the frame 10 in the first direction is adjustable, so as to adapt to the different forehead heights of the patients and be suitable for different patients. On the one hand, it can improve the patient's wearing experience, and on the other hand, it can prevent the forehead support 20 from having a poor contact effect with the patient's forehead, so that the part of the frame 10 that fits the patient's face is not tightly fitted, affecting the sealing effect of the breathing mask 200, and preventing the problem of air leakage when the breathing mask 200 is used for treatment, thereby improving the treatment effect.

[0080] In addition, the frame 10 is connected to the forehead support 20. At a position on the frame 10 where the forehead support 20 is not provided, the frame 10 may have a shell, in which a pad 60 may be provided. The pad 60 may be elastic, so that when the patient wears the respiratory mask 200, the pad 60 directly contacts the user's face, thereby enabling the respiratory mask 200 to have better contact with the patient's face.

[0081] The first direction is the connection direction between the first connecting member 11 and the second connecting member 21, or it can be said that the connection direction between the first connecting member 11 and the second connecting member 21. When the breathing mask 200 provided by the embodiment of the utility model is used, the cushion 60 is directly fitted with the patient's face, and the forehead support member 20 is in contact with the patient's forehead. The first direction can also be considered to be the direction from the forehead support member 20 or the frame 10 to the patient's head, such as Figure 1 shown.

[0082] In addition, in some embodiments, Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the breathing mask 200 may also include an elastic forehead pad 50, a mounting hole 23 is provided on the surface of the forehead support 20 facing away from the second connecting member 21, the mounting hole 23 penetrates the forehead support 20 along the first direction, and a mounting member 51 is provided on the surface of the forehead pad 50 facing the forehead support 20, and the mounting member 51 is embedded in the mounting hole 23.

[0083] The breathing mask 200 also includes an elastic forehead pad 50. A mounting hole 23 is provided on the surface of the forehead support 20 facing away from the second connecting member 21. The mounting hole 23 penetrates the forehead support 20 along a first direction. A mounting member 51 is provided on the surface of the forehead pad 50 facing the forehead support 20. The mounting member 51 can be embedded in the mounting hole 23, so that the forehead pad 50 can be connected to the forehead support 20. The forehead support 20 can contact the patient's forehead through the elastic forehead pad 50, which can improve the patient's wearing comfort. When the patient wears it, the forehead pad 50 can be deformed under the action of the patient's forehead, so that the forehead pad 50 has an additional better fit with the patient, which can further improve the versatility of the breathing mask 200.

[0084] Among them, the mounting member 51 may be provided with an elastic protrusion larger than the mounting through hole 23. When the forehead pad 50 is set, the elastic protrusion can pass through the mounting through hole 23. The elastic protrusion can limit the mounting member 51 in the first direction to prevent the mounting member 51 from escaping from the mounting through hole 23, thereby preventing the forehead pad 50 from being separated from the forehead support member 20; alternatively, the mounting member 51 may be an elastic member, and part of the mounting member 51 may be larger than the size of the mounting through hole 23. When the forehead pad 50 is set, the part of the mounting member 51 larger than the mounting through hole 23 may pass through the mounting through hole 23. The part of the mounting member 51 larger than the mounting through hole 23 can limit the mounting member 51 in the first direction to prevent the mounting member 51 from being escaping from the mounting through hole 23, thereby preventing the forehead pad 50 from being separated from the forehead support member 20.

[0085] In addition, in some embodiments, a deformation hole is further provided inside the forehead pad 50, and the deformation hole penetrates the forehead pad 50 along the second direction. The setting of the deformation hole can make the forehead pad 50 a hollow structure. When the forehead pad 50 is deformed, the deformation hole can also be deformed accordingly, so as to facilitate the deformation of the forehead pad 50 when it contacts the patient's forehead.

[0086] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. A forehead adjustment bracket for a breathing mask, characterized in that: The forehead adjustment bracket includes a first connecting member and a second connecting member, the first connecting member and the second connecting member are coaxial, one of the first connecting member and the second connecting member is hollow inside and is provided with a limiting structure protruding inwardly, and the other is provided with a matching structure, and the two can move axially relative to each other; the first connecting member and the second connecting member cannot rotate relative to each other.

2. The forehead adjustment bracket according to claim 1, characterized in that: The limiting structure and / or the matching structure extend along the first direction, and different positions of the limiting structure can be engaged with the matching structure, or the limiting structure can be engaged with different positions of the matching structure, so that the first connecting member and the second connecting member can move axially relative to each other; The first direction is the axial direction of the first connecting member.

3. The forehead adjustment support according to claim 2, characterized in that: The first connecting member is provided with a first through hole, the first through hole extending along the first direction so that the first connecting member is hollow inside, the inner wall of the first through hole is provided with a latching tooth protruding inwardly, the number of the latching teeth is multiple, the multiple latching teeth are spaced apart along the first direction, and the multiple latching teeth form the limiting structure; A clamping strip is connected to the second connecting member, the clamping strip forms the matching structure, the clamping strip is passed through the first through hole, and the clamping strip can be clamped with the plurality of clamping teeth at different positions along the first direction; wherein the clamping strip is an elastic clamping strip, or the clamping teeth are elastic clamping teeth.

4. The forehead adjustment support according to claim 3, characterized in that: An operating member is connected to the second connecting member, and a mounting hole is also provided on the first connecting member. The axis of the mounting hole intersects with the first direction, and the mounting hole is connected to the first through hole. The operating member is embedded in the first through hole, and part of the operating member is exposed from the first through hole. The mounting hole extends along the first direction.

5. The forehead adjustment support according to claim 3, characterized in that: The clamping strip includes a body and a clamping platform, one end of the body is connected to the second connecting member, the clamping platform is connected to the other end of the body, and the clamping platform protrudes from the surface of the body facing the clamping teeth. The clamping platform can be clamped with multiple clamping teeth at different positions along a first direction.

6. The forehead adjustment support according to claim 2, characterized in that: The second connecting member is provided with a second through hole, the second through hole extending along the first direction so that the interior of the second connecting member is hollow, and the inner wall of the second through hole is provided with a locking tooth protruding inwardly, the number of the locking teeth is multiple, the multiple locking teeth are spaced apart along the first direction, and the multiple locking teeth form the limiting structure; The first connecting member is connected with a clamping strip, the clamping strip forms the matching structure, the clamping strip is passed through the second through hole, and the clamping strip can be clamped with the plurality of clamping teeth at different positions along the first direction; Wherein, the clamping strip is an elastic clamping strip or the clamping teeth are elastic clamping teeth.

7. The forehead adjustment support according to claim 2, characterized in that: The first connecting member is provided with a first through hole, the first through hole extending along the first direction so that the first connecting member is hollow inside, the inner wall of the first through hole is provided with a clamping groove, the clamping grooves extend at intervals along the first direction, the bottom of the clamping groove is provided with a plurality of teeth protruding inwardly, and the plurality of teeth form the limiting structure; The second connecting member is inserted into the first through hole, and a buckle is provided on the surface of the second connecting member facing the hole wall of the first through hole, the buckle forms the matching structure, and the buckle can be engaged with the plurality of teeth at different positions along the first direction; Wherein, the teeth are elastic teeth, or the buckle is an elastic buckle.

8. The forehead adjustment support according to claim 2, characterized in that: The first connecting member is provided with a first through hole, the first through hole extending along the first direction so that the first connecting member is hollow inside, and the inner wall of the first through hole is provided with a clamping groove, the clamping groove forming the matching structure; The second connecting member is passed through the first through hole, and a plurality of inwardly protruding snap buckles are arranged on the surface of the second connecting member facing the hole wall of the first through hole, and the plurality of snap buckles are arranged at intervals along the first direction, and the plurality of snap buckles form the limiting structure, and the snap groove can be snapped with the plurality of snap buckles at different positions along the first direction; Wherein, the snap buckle is an elastic snap buckle.

9. The forehead adjustment support according to claim 2, characterized in that: The first connecting member is provided with a first through hole and a plurality of first clamping holes, the first through hole penetrates the first connecting member along the first direction so that the first connecting member is hollow, the first clamping hole penetrates the first connecting member along the second direction, the second connecting member is embedded in the first through hole, the second connecting member is provided with a second clamping hole, the second clamping hole penetrates the second connecting member along the second direction, the second clamping hole forms the matching structure, and the second clamping hole is opposite to a first clamping hole among the plurality of first clamping holes; The first clamping hole is provided with a fixing piece protruding inwardly, the fixing piece is connected to the hole wall of the first clamping hole, the fixing piece forms the limiting structure, and the second clamping hole can be clamped with one of the plurality of fixing pieces along the first direction; The second direction intersects with the first direction.

10. A breathing mask, characterized in that: include: A frame, a forehead support, and a forehead adjustment bracket according to any one of claims 1 to 9, wherein the first connecting member is fixed to the frame, and the second connecting member is fixed to the forehead support to adjust the distance between the forehead support and the frame.

11. The breathing mask according to claim 10, characterized in that The breathing mask also includes an elastic forehead pad, a mounting hole is provided on the surface of the forehead support member facing away from the second connecting member, the mounting hole penetrates the forehead support member along a first direction, and a mounting member is provided on the surface of the forehead pad facing the forehead support member, and the mounting member is embedded in the mounting hole.

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