Warmer with combustion net

Abstract

The warmer with the combustion net comprises a base assembly and a furnace end, the base assembly directly supports the furnace end or indirectly supports the furnace end through a supporting pipe, and the warmer is characterized in that the furnace end comprises the combustion net installed on the furnace end, the installed combustion net is provided with a central axis, and the central axis of the combustion net is perpendicular to the central axis. The combustion net is provided with a protruding part used for increasing the surface area of the combustion net, and in the direction of the central axis, the height of the protruding part is smaller than or equal to nine tenths of the height of the combustion net. The warmer is good in warming effect.

Description

A heater with a combustion mesh Technical Field

[0001] This application relates to the field of heating technology, and more specifically, in particular to a heater with a combustion mesh. Background Technology

[0002] Heaters provide warmth to users through heat convection and radiation generated by the combustion of gas. When using heaters outdoors, due to environmental factors, heat is primarily transferred through radiation. Gas combustion occurs within the heater's burner head; for safety reasons, the gas burns within a combustion chamber, and most of the heat is delivered to the user through the radiation from this chamber. However, the combustion chamber, being a regular plane or curved surface, limits its radiant area, thus limiting the heating effect. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings of the prior art by proposing a combustion mesh with a large thermal radiation area to improve heating effect and a heater with the combustion mesh.

[0004] To achieve the above objectives, this application proposes a heater with a combustion mesh, including a base assembly and a burner head. The base assembly directly supports or indirectly supports the burner head through a support tube. The burner head includes a combustion mesh installed on the burner head. After installation, the combustion mesh has a central axis and a protrusion for increasing the surface area of ​​the combustion mesh. In the direction of the central axis, the height of the protrusion is less than or equal to nine-tenths of the height of the combustion mesh.

[0005] The height of the protrusion is greater than or equal to one-tenth of the height of the combustion net.

[0006] The combustion mesh has an open mesh portion and a connecting portion for connection. The connecting portion fixes the combustion mesh to other components of the burner head. The mesh portion is used for airflow to enter and exit the combustion mesh. The height of the mesh portion is greater than or equal to half the height of the combustion mesh, and the height of the mesh portion is less than or equal to the height of the combustion mesh.

[0007] The height of the protrusion is less than the height of the mesh portion.

[0008] The combustion net includes a main body, and the protrusions extend from the main body toward the outside of the combustion net. Each protrusion includes a peak. On a plane passing through the peak and perpendicular to the central axis, the distance between a point on the peak and the central axis is greater than the distance between a point on the main body and the central axis. Alternatively, the protrusion extends from the main body toward the inside of the combustion net, and the distance between a point on the peak and the central axis is less than the distance between a point on the main body and the central axis.

[0009] The height of the peak is less than the height of the protrusion, the height of the peak is less than or equal to nine-tenths of the height of the combustion net, and the height of the peak is greater than one-tenth of the height of the combustion net.

[0010] The height of the protrusion is greater than two-fifths of the height of the combustion net, and the height of the protrusion is less than three-fifths of the height of the combustion net.

[0011] The height of the peak is greater than two-fifths of the height of the combustion net, and the height of the peak is less than three-fifths of the height of the combustion net.

[0012] The combustion mesh also includes a reinforcing ring, the burner head includes an ignition plate, the reinforcing ring is fixed to the combustion mesh, the reinforcing ring surrounds the ignition plate, the reinforcing ring is located inside the combustion mesh, and the reinforcing ring is fixed in the area below the protrusion.

[0013] The protrusion located between the main body and the peak is inclined, and part of the protrusion is perpendicular to the direction of the user.

[0014] Beneficial effects:

[0015] As can be seen from the above technical solutions, this application has the following advantages compared with the prior art:

[0016] 1. Compared with the combustion mesh in the prior art, the combustion mesh with raised parts has a larger mesh area, which allows the burner to absorb more heat from the flame near the ignition plate and improve the heat absorption effect of the burner.

[0017] 2. Because the burner has a large area for absorbing the flame from the ignition plate, the area of ​​the burner that radiates heat outward is also large, which improves the heat radiation effect of the burner and thus improves the heating effect of the heater.

[0018] 3. The protrusions have a reinforcing effect in the height direction of the burner, which improves the pressure resistance of the burner in the height direction, thereby improving the structural strength of the burner;

[0019] 4. The height setting of the protrusion can, on the one hand, form an inclined curved surface at the combustion mesh, so that heat radiation can radiate towards the user in a direction perpendicular to the curved surface, thereby improving thermal efficiency; on the other hand, it can facilitate the assembly and fixing of the combustion mesh.

[0020] 5. A reinforcing ring is installed below the protrusion to reduce the possibility of creep in the combustion mesh at high temperatures and to reduce the occurrence of deformation of the combustion mesh;

[0021] 6. The height of the protrusion facilitates the assembly of the reinforcing ring or allows the reinforcing ring to fit more tightly with the combustion mesh, thus improving the stability of the connection between the reinforcing ring and the combustion mesh. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of a heater burner in the prior art;

[0023] Figure 2 is a three-dimensional assembly diagram of a heater according to an embodiment of this application;

[0024] Figure 3 is a schematic diagram of the structure of the burner head according to an embodiment of this application;

[0025] Figure 4 is a partial cross-sectional view along line AA in Figure 3;

[0026] Figure 5 is an enlarged schematic diagram of circle D in Figure 4;

[0027] Figure 6 is a schematic diagram of the structure of a combustion mesh according to an embodiment of this application;

[0028] Figure 7 is an enlarged view of circle E in Figure 6;

[0029] Figure 8 is a partial cross-sectional view along line BB in Figure 6;

[0030] Figure 9 is a partial cross-sectional view along line CC in Figure 6.

[0031] Figure label:

[0032] 1-Reflector cover; 2-Burnhead; 21-Combustion mesh; 211-Mesh section; 2111-Main body section; 2112-Protrusion; 2113-Peak section; 212-Connecting section; 213-Reinforcing ring; 22-Mesh base; 23-Top cover; 24-Small mesh; 25-Ignition plate; 251-Ignition hole; 3-Support tube; 4-Base assembly; L-Central axis. Detailed Implementation

[0033] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings.

[0034] Please refer to Figures 1 to 9. A heater with a combustion mesh 21 according to this application includes a reflector cover 1, a burner head 2, a support tube 3 and a base assembly 4. The lower end of the support tube 3 is fixed to the base assembly 4, the upper end of the support tube 3 is fixed to the lower end of the burner head 2, and the upper end of the burner head 2 is fixed to the reflector cover 1, so that the base assembly 4 supports the support tube 3, the support tube 3 supports the burner head 2, and the burner head 2 supports the reflector cover 1.

[0035] The burner head 2 includes an ignition plate 25, a combustion mesh 21, a top cover 23, a mesh base 22, and a small mesh 24. The lower end of the combustion mesh 21 is fixed to the mesh base 22, and the upper end of the combustion mesh 21 is fixed to the top cover 23. The combustion mesh 21 and the mesh base 22 are fixed with screws, and the combustion mesh 21 and the top cover 23 are welded together. The combustion mesh 21 is a cylindrical structure with open ends or a hollow cylindrical structure with open ends. The ignition plate 25 is located inside the combustion mesh 21, and the combustion mesh 21 surrounds the ignition plate 25. The support tube 3 is connected to the small mesh 24 and supports the burner head 2. The small mesh 24 supports the mesh base 22, and the mesh base 22 supports the ignition plate 25 and the combustion mesh 21. In this application, the fixing methods include, but are not limited to, bolt or screw connections, threaded connections, snap-fit ​​connections, welding, integral molding, etc., or combinations of two or more connection methods. Those skilled in the art can choose according to actual needs.

[0036] The combustion mesh 21 has a mesh portion 211 and a connecting portion 212. The mesh portion 211 has mesh holes, and the connecting portion 212 is used to fix the combustion mesh 21, such as fixing the combustion mesh 21 to the mesh base 22 via the connecting portion 212; the combustion mesh 21 is also fixed to the top cover 23 via the connecting portion 212 to protect the combustion mesh 21. In the combustion mesh 21, the proportion occupied by the mesh portion 211 is greater than the proportion occupied by the connecting portion 212, and the area of ​​the mesh portion 211 is greater than or equal to half of the total area of ​​the combustion mesh 21. In this embodiment, the ratio of the area of ​​the mesh portion 211 to the area of ​​the connecting portion 212 is 20:3.

[0037] The mesh portion 211 completely surrounds the ignition plate 25. When the ignition plate 25 and the mesh portion 211 are projected onto a plane perpendicular to the horizontal plane, the projection of the ignition plate 25 falls entirely within the projection of the mesh portion 211. The mesh openings of the mesh portion 211 can be used to allow gas to flow into the combustion mesh 21 and also to allow gas to flow out of the combustion mesh 21, such as the entry of oxygen and the exit of hot air. To clearly illustrate the position of the mesh portion 211 within the combustion mesh 21 and the specific structure of the mesh openings, the diameter of the mesh openings in the accompanying drawings of this application is enlarged from the actual size of 1 to 3 millimeters to a size of 6 to 10 millimeters. For example, enlarging the original 2-millimeter mesh openings to 8-millimeter mesh openings improves the visual effect of the mesh openings. Of course, those skilled in the art can choose different mesh opening diameters according to actual needs.

[0038] The mesh portion 211 includes a main body portion 2111 and a protrusion portion 2112. The main body portion 2111 and the protrusion portion 2112 are different regions of the mesh portion 2111. The protrusion portion 2112 has a protruding structure relative to the main body portion 2111. The protrusion portion 2112 can protrude either towards the interior or the exterior of the combustion mesh 21. In this embodiment, the protrusion portion 2112 protrudes towards the exterior of the combustion mesh 21. Compared with the combustion mesh 21 in the prior art, the provision of the protrusion portion 2112 increases the area of ​​the combustion mesh 21, improves the radiation area of ​​the combustion mesh 21 when radiating to the user, and improves the heating effect for the user. The mesh can be located in the main body portion 2111 or in the protrusion portion 2112. Of course, a single mesh can be partially located in the protrusion portion 2112 and partially located in the main body portion 2111. At the same time, the protrusions 2112 can improve the structural strength of the combustion mesh 21, thereby increasing the service life of the combustion mesh 21.

[0039] The processing technology of the combustion mesh 21 is sheet metal punching, followed by welding at both ends to form a cylindrical structure with open ends. The protrusions 2112 can be formed by stamping before punching or after punching.

[0040] The formed combustion mesh 21 is a cylinder with open ends, or the combustion mesh 21 installed on the burner head 2 is a cylinder with open ends. The combustion mesh 21 has a central axis L, which is a virtual axis. Without considering the thickness of the combustion mesh 21, the distance between each point on the main body 2111 and the central axis L is the same; or, on the same plane passing through the central axis L of the combustion mesh 21, the distance between each point on the main body 2111 and the axis line is the same. The protrusion 2112 formed by protruding from the main body 2111 into the combustion mesh 21 has a smaller distance between each point on the protrusion 2112 and the axis line on the same plane passing through the central axis L of the combustion mesh 21 than the distance between each point on the main body 2111 and the axis line; the protrusion 2112 formed by protruding from the main body 2111 into the combustion mesh 21 has a larger distance between each point on the protrusion 2112 and the axis line on the same plane passing through the central axis L of the combustion mesh 21 than the distance between each point on the main body 2111 and the axis line.

[0041] The protrusion 2112 includes a peak 2113, which is the highest or lowest point of the protrusion 2112 relative to the central axis L of the combustion net 21. If the protrusion 2112 protrudes into the combustion net 21, the distance between the point on the peak 2113 and the axis is less than the distance between the point on other positions of the combustion net 21 and the axis on the same plane perpendicular to the central axis L of the combustion net 21. If the protrusion 2112 protrudes outward from the combustion net 21, the distance between the point on the peak 2113 and the axis is greater than the distance between the point on other positions of the combustion net 21 and the axis on the same plane perpendicular to the central axis L of the combustion net 21.

[0042] The protrusion 2112 extends along the central axis L of the combustion mesh 21, making the protrusion 2112 a long strip on the combustion mesh 21. By definition, on the combustion mesh 21, the direction parallel to the central axis L is the height direction, and the direction perpendicular to the central axis L is the width direction. Since the combustion mesh 21 is cylindrical, the width direction also includes the circumferential direction of the combustion mesh 21 that is perpendicular to the plane containing the central axis L. In the height direction, the end of the combustion mesh 21 connected to the top cover 23 is the upper end of the combustion mesh 21, or the end of the combustion mesh 21 closer to the top cover 23 is the upper end of the combustion mesh 21; the end of the combustion mesh 21 connected to the mesh base 22 is the lower end of the combustion mesh 21, or the end of the combustion mesh 21 closer to the mesh base 22 is the lower end of the combustion mesh 21, that is, the end of the combustion mesh 21 closer to the top cover 23 is the upper end of the combustion mesh 21.

[0043] In the height direction, the height of the protrusion 2112 is greater than or equal to one-tenth of the height of the combustion net 21, and the height of the protrusion 2112 is less than or equal to nine-tenths of the height of the combustion net 21. For example, the height of the protrusion 2112 is one-tenth, one-fifth, three-tenths, two-fifths, one-half, three-fifths, seven-tenths, four-fifths, nine-tenths, etc. of the height of the combustion net 21. The height of the protrusion 2112 is within any of the above-mentioned height ratios, that is, the height of the protrusion 2112 is one-tenth, one-fifth, three-tenths, two-fifths, one-half, three-fifths, seven-tenths, four-fifths, nine-tenths, etc., of the height of the protrusion 2112. For example, the height of the protrusion 2112 is less than four-fifths of the height of the combustion net 21, and the height of the protrusion 2112 is greater than one-fifth of the height of the combustion net 21; or, the height of the protrusion 2112 is less than three-fifths of the height of the combustion net 21, and the height of the protrusion 2112 is greater than two-fifths of the height of the combustion net 21. The height of the peak 2113 is greater than one-tenth of the height of the combustion mesh 21, and less than nine-tenths of the height of the combustion mesh 21. For example, the height of the peak 2113 can be one-tenth, one-fifth, three-tenths, two-fifths, one-half, three-fifths, seven-tenths, four-fifths, or nine-tenths of the height of the combustion mesh 21, or the height of the peak 2113 can be within the above proportions, such as the height of the peak 2113 being less than three-fifths of the height of the combustion mesh 21 and greater than two-fifths of the height of the combustion mesh 21. The height of the protrusion 2112 or the peak 2113 can be selected by those skilled in the art within the above height range as needed. It is understood that when there are multiple protrusions 2112 in the height direction of the combustion mesh 21, the height of the protrusion 2112 is calculated as the sum of the heights of the multiple protrusions 2112.

[0044] The height of the mesh portion 211 is greater than or equal to the height of the protrusion 2112, and the height of the mesh portion 211 is less than or equal to the height of the combustion mesh 21. Specifically, the height of the mesh portion 211 is greater than or equal to one-half the height of the combustion mesh 21, and the height of the mesh portion 211 is less than or equal to the height of the combustion mesh 21. In this embodiment, the height of the mesh portion 211 is greater than or equal to three-fifths the height of the combustion mesh 21, and the height of the mesh portion 211 is less than or equal to nineteen-twentieths the height of the combustion mesh 21.

[0045] Specifically, as shown in Figure 8, in this embodiment, the height H1 of the combustion mesh 21 is 200 mm, the height H2 of the mesh portion 211 is 170 mm, the height H3 of the connecting portion 212 at the top and bottom of the combustion mesh 21 is 15 mm, the height H4 of the protrusion 2112 is 114 mm, and the height H5 of the peak 2113 is 100 mm. That is, the height of the peak 2113 is half the height of the combustion mesh 21; the height of the mesh portion 211 is seventeen-twentieths of the height of the combustion mesh 21; and the height of the protrusion 2112 is fifty-sevenths of the height of the combustion mesh 21. If the height of the protrusion 2112 is too large, it is not conducive to the installation and fixation of the combustion mesh 21; if the height of the protrusion 2112 is too small, the increased radiation area is too small, and the increase in heating effect is not significant.

[0046] In the vertical direction, the peak 2113 is positioned in the upper middle part of the combustion mesh 21, meaning the distance between the upper end of the peak 2113 and the upper end of the combustion mesh 21 is less than the distance between the lower end of the peak 2113 and the upper end of the combustion mesh 21; or, the distance between the upper end of the protrusion 2112 and the upper end of the combustion mesh 21 is less than the distance between the lower end of the protrusion 2112 and the upper end of the combustion mesh 21. Specifically, the distance between the upper end of the peak 2113 and the upper end of the combustion mesh 21 is 30 mm, and the distance between the lower end of the peak 2113 and the lower end of the combustion mesh 21 is 70 mm. Those skilled in the art can select the distance between the upper end of the peak 2113 and the upper end of the combustion mesh 21, and the distance between the lower end of the peak 2113 and the lower end of the combustion mesh 21, as needed.

[0047] Referring to Figure 9, in the width direction, at the connection between the protrusion 2112 and the main body 2111, the width of the protrusion 2112 itself is W1, and the width between adjacent protrusions 2112 is W2, where W1 is greater than W2. In this embodiment, W1 is 30 mm and W2 is 12 mm.

[0048] The combustion mesh 21 is also provided with a reinforcing ring 213, which is located inside or outside the combustion mesh 21. The reinforcing ring 213 is located on the outer periphery of the ignition plate 25 and surrounds the ignition plate 25. In this embodiment, the reinforcing ring 213 is located inside the combustion mesh 21 and is positioned opposite to the ignition plate 25. The reinforcing ring 213 surrounds the ignition plate 25. Taking any plane passing through the central axis L of the combustion mesh 21 as the projection plane, the projection part or all of the ignition plate 25 is located within the projection of the reinforcing ring 213, and all the ignition holes 251 of the ignition plate 25 are located within the projection of the reinforcing ring 213. In the height direction, the height of the reinforcing ring 213 is 30 mm. When the heater is working, the gas flowing out of the ignition hole 251 of the ignition plate 25 is ignited, causing the combustion mesh 21 located near the ignition plate 25 to be heated between the flames. Over time, this causes the combustion mesh 21 to undergo high-temperature creep, resulting in deformation of the combustion mesh 21. The reinforcing ring 213 can reduce the possibility of deformation of the combustion mesh 21 and improve the service life of the combustion mesh 21.

[0049] The reinforcing ring 213 is located below the peak 2113, or below the protrusion 2112. Specifically, the reinforcing ring 213 is located below the lower end of the protrusion 2112, that is, the protrusion 2112 is located above the top surface of the reinforcing ring 213. The reinforcing ring 213 has mesh holes, and the diameter of the mesh holes on the reinforcing ring 213 is the same as the diameter of the mesh holes on the combustion mesh 21. The reinforcing ring 213 is welded to the combustion mesh 21 or integrally formed. In the integral forming method, during the stamping process, the thickness of the combustion mesh 21 at the reinforcing ring 213 is greater than the thickness of the combustion mesh 21 at other locations. This connection method improves the stability of the connection between the reinforcing ring 213 and the combustion mesh 21. At the same time, the reinforcing ring 213 is located below the protrusion 2112, which allows the reinforcing ring 213 to be welded to the regular curved surface of the combustion mesh 21, facilitating the installation of the reinforcing ring 213 and making the reinforcing ring 213 and the combustion mesh 21 fit or weld more tightly, further improving the stability of the connection.

[0050] Please refer to Figure 4. In this embodiment, the horizontal plane where the lower end of the protrusion 2112 is located is P1, the horizontal plane where the upper end of the reinforcing ring 213 is located is P2, the horizontal plane where the center of the ignition hole 251 is located is P3, and the horizontal plane where the lower end of the reinforcing ring 213 is located is P4. P1 is above P2, P2 is above P3, and P3 is above P4. The distance between P3 and P2 is greater than the distance between P3 and P4. As the hot airflow of the flame rises, the upper part of the reinforcing ring 213 receives more heat. Therefore, the ignition hole 251 is located in the lower middle part of the reinforcing ring 213.

[0051] The protrusion 2112, which protrudes outward from the main body 2111 towards the combustion mesh 21, has a peak 2113 that forms an inclined surface or a sloping curved surface between itself and the main body 2111. The direction perpendicular to the main body 2111 is horizontal, and the direction perpendicular to the sloping curved surface is inclined. The downward sloping direction is the direction of the user, which improves the heat radiation efficiency of the protrusion 2112 and thus enhances the heating effect of the heater. At the same time, the flame emitted from the ignition hole 251 points upward, and the sloping curved surface is located at the outer flame of the flame, resulting in a higher surface temperature and stronger heat radiation capacity, further improving the heating effect.

[0052] In some embodiments, the combustion mesh 21 has no connecting part 212 structure, that is, the combustion mesh 21 is all mesh part 211 structure. When the combustion mesh 21 is connected to the top cover 23 or the mesh base 22, it is connected by screws or welding through the mesh.

[0053] It is evident that the terms "first," "second," etc., used in the specification and claims herein are used to distinguish different structures, devices, components, etc., and do not represent a sequential order, nor do they limit "first" and "second" to different types. "Comprising" is an open-ended term and should therefore be interpreted as "including but not limited to." "Approximately" or "generally" means that within an acceptable error range, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain error range. Terms such as "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a fixed connection can also be integrally formed; they can be a direct connection or an indirect connection through an intermediate medium, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Vertical" in this document should be understood as within the range of process error, or the angle at a vertical point ranges from 80° to 100°; "parallel" should be understood as within the range of process error, having a process error of approximately 10°.

[0054] Although embodiments of this application have been shown and described above, it is understood that the above description is only a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has been disclosed above with reference to preferred embodiments, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heater with a combustion mesh, comprising a base assembly and a burner head, wherein the base assembly directly supports or indirectly supports the burner head via a support tube, characterized in that, The burner head includes a combustion mesh installed on the burner head. After installation, the combustion mesh has a central axis and a protrusion for increasing the surface area of ​​the combustion mesh. In the direction of the central axis, the height of the protrusion is less than or equal to nine-tenths of the height of the combustion mesh.

2. The warmer of claim 1, wherein The height of the protrusion is greater than or equal to one-tenth of the height of the combustion net.

3. The heater according to claim 2, characterized in that, The combustion mesh has an open mesh portion and a connecting portion for connection. The connecting portion fixes the combustion mesh to other components of the burner head. The mesh portion is used for airflow to enter and exit the combustion mesh. The height of the mesh portion is greater than or equal to half the height of the combustion mesh, and the height of the mesh portion is less than or equal to the height of the combustion mesh.

4. The heater according to claim 3, characterized in that, The height of the protrusion is less than the height of the mesh portion.

5. The heater according to claim 2, characterized in that, The combustion net includes a main body, and the protrusions extend from the main body toward the outside of the combustion net. Each protrusion includes a peak. On a plane passing through the peak and perpendicular to the central axis, the distance between a point on the peak and the central axis is greater than the distance between a point on the main body and the central axis. Alternatively, the protrusion extends from the main body toward the inside of the combustion net, and the distance between a point on the peak and the central axis is less than the distance between a point on the main body and the central axis.

6. The heater according to claim 5, characterized in that, The height of the peak is less than the height of the protrusion, the height of the peak is less than or equal to nine-tenths of the height of the combustion net, and the height of the peak is greater than one-tenth of the height of the combustion net.

7. The heater according to claim 2, characterized in that, The height of the protrusion is greater than two-fifths of the height of the combustion net, and the height of the protrusion is less than three-fifths of the height of the combustion net.

8. The heater according to claim 6, characterized in that, The height of the peak is greater than two-fifths of the height of the combustion net, and the height of the peak is less than three-fifths of the height of the combustion net.

9. The warmer of claim 1, wherein, The combustion mesh also includes a reinforcing ring, the burner head includes an ignition plate, the reinforcing ring is fixed to the combustion mesh, the reinforcing ring surrounds the ignition plate, the reinforcing ring is located inside the combustion mesh, and the reinforcing ring is fixed in the area below the protrusion.

10. The warmer of claim 5, wherein, The protrusion located between the main body and the peak is inclined, and part of the protrusion is perpendicular to the direction of the user.

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