Firewood stove and mesh ash tray assembly thereof

Abstract

The utility model relates to a firewood stove and mesh ash tray component, the mesh ash tray component is erected in the firewood stove and comprises a support net and an ash deposition tray which are fixedly connected with each other, the support net is positioned above the ash deposition tray, and a plurality of ash falling holes are arranged on the support net so that ash can fall into the ash deposition tray below the support net. And a plurality of through holes are formed in the side wall of the ash deposition disc and are communicated with the ash falling holes. According to the technical scheme, the mesh ash tray assembly is of an integrated structure and is erected in the firewood stove, after the firewood stove is used, the mesh ash tray assembly can be integrally taken out to pour ash, and when the ash is poured, the mesh ash tray assembly can be inverted to discharge the ash from the ash falling hole. Through holes are formed in the peripheral side of the ash deposition disc and used for ventilation to support combustion, and when the ash is poured, the mesh ash disc assembly can be turned over to a certain angle to discharge the ash from the position. In addition, the mesh ash tray assembly is separably arranged in the firewood stove, so that the supporting mesh is convenient to replace, and the service life of the firewood stove can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a wood-burning stove and a mesh ash pan assembly thereof. Background Art

[0002] Nowadays, outdoor camping is becoming more and more popular among the public. Since firewood is widely available, many people bring a wood stove when they go camping. The support net of the existing wood stove is fixed inside the wood stove, and the ash tray is stably set below the support net. The ashes after the combustion of the combustible material fall from the mesh of the support net into the ash tray below. When the user cleans the ashes, he needs to turn the wood stove upside down with the mouth facing the ground to pour out the ashes, which is very inconvenient, time-consuming and laborious. In addition, the support net is directly below the combustible material. After long-term use, if it is melted, it is inconvenient to replace the support net because the support net is welded to the furnace body, which affects the service life of the furnace body. Summary of the invention

[0003] In order to solve the above problems, the first purpose of the utility model is to provide a mesh ash pan assembly, which fixes the supporting net and the ash pan together to form a mesh ash pan assembly. The mesh ash pan assembly is mounted in the furnace body. After the wood stove is used, the mesh ash pan assembly can be taken out to pour out the ash, which is very convenient and avoids time-consuming and labor-intensive manual work. In addition, the mesh ash pan assembly is used as a whole in the wood stove, which is easy to replace and can increase the service life of the wood stove. The second purpose of the utility model is to provide a wood stove having the above-mentioned mesh ash pan assembly.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A mesh ash pan assembly, characterized in that: the mesh ash pan assembly is set up in a wood-burning stove, and comprises a supporting net and an ash pan fixedly connected to each other, the supporting net is located above the ash pan, a plurality of ash-falling holes are provided on the supporting net so that ashes can fall into the ash pan below, and a plurality of through holes are provided on the side wall of the ash pan communicating with the ash-falling holes.

[0006] In the above technical solution, the mesh ash tray assembly includes a support net and an ash tray. The support net is used to support the combustible material (firewood, burning particle lamp), and the support net has an ash drop hole. The ashes after the combustible material is burned fall from the ash drop hole into the ash tray below, and the ash tray is used to receive the ashes. The mesh ash tray assembly is an integrated structure erected in the wood stove. After the wood stove is used, the mesh ash tray assembly can be taken out as a whole to pour out the ash. When pouring out the ash, the mesh ash tray assembly can be inverted to discharge the ash from the ash drop hole. It should be noted here that the ash drop hole is generally set smaller to prevent the combustible material from falling, and the ash tray is provided with a through hole on the side, which is used for ventilation to support combustion. When pouring out the ash, the mesh ash tray assembly can also be flipped to a certain angle to discharge the ash from here. The through hole is set larger, and it is easier to discharge the ash. Although the number is not as many as the ash drop hole, it is also a good way to discharge the ash. In addition, the mesh ash tray assembly can be detachably arranged in the wood stove, which is convenient for the replacement of the support net and can increase the service life of the wood stove.

[0007] Preferably, a handle is fixedly provided on the middle part of the support net extending upward. In this technical solution, the setting of the handle can facilitate the user to take out the mesh ash tray assembly to pour out the ash, and it is more stable when taking out the mesh ash tray assembly, preventing the mesh ash tray assembly from tilting and pouring the ash into the furnace body.

[0008] Preferably, the support net is in a step-like shape, and the multiple steps are arranged from high to low from the inside to the outside. In this technical solution, the support net is in a step-like shape, so that a certain gap can be formed between the combustion object placed on the support net and the steps, thereby enhancing the ventilation effect between the support net surface and the combustion object and improving the combustion rate. The multiple steps are arranged from high to low from the inside to the outside, which can improve the overall deformation resistance of the support net and make it less likely to collapse.

[0009] Preferably, the multiple steps are arranged regularly from high to low, and multiple ash holes are regularly arranged on the multiple steps. In this technical solution, the multiple steps are arranged regularly from high to low to ensure the strength of the steps and avoid deformation due to excessive width of a certain step. In order to maintain stability, the ash holes on the top step are round holes, and the ash holes on the other steps are rounded square holes. These ash holes are regularly arranged, so that the air intake on the support net is relatively uniform and the combustion is fully uniform. In addition, the round holes and the rounded square holes have the same width, which can support the combustion of firewood and combustion particles.

[0010] Preferably, the edge of the mesh ash pan assembly is formed with a retaining ring mounted in the wood stove. In this technical solution, the retaining ring formed on the mesh ash pan assembly is mounted in the wood stove, and the retaining ring can be formed on the support net or on the ash pan.

[0011] Preferably, the edge of the support net extends upward to form a flange, the retaining ring is a splicing platform formed on the upper inner side of the ash pan, the outer edge of the lower end of the support net is fixedly connected to the splicing platform, and the flange is fixedly connected to the upper inner wall of the ash pan. In this technical solution, the flange of the support net is higher than the fixed area between the ash pans, which is more secure; the retaining ring is a splicing platform on the ash pan, which can maximize the volume of the ash pan and load the gravity of both onto the wood stove. If the retaining ring is formed on the support net, the ash pan is affected by gravity alone and the gravity of both is also loaded onto the wood stove, which increases instability.

[0012] Preferably, the inner diameter of the ash pan gradually decreases from top to bottom, and the multiple through holes are regularly arranged on the side wall of the ash pan in a circumferential direction. In this technical solution, the cross-section of the ash pan is in the shape of an inverted cone, and multiple through holes are arranged on the side wall of the pan body, so that the air coming in from the bottom can quickly flow along the inclined surface from the through holes to the support net, thereby increasing the air intake per unit time, and maximizing the volume of the pan body while ensuring ventilation, thereby increasing the amount of ash accumulation. It should also be noted here that the bottom of the ash pan is closer to the air inlet hole described below, and the bottom of the ash pan is an upwardly concave arc surface, which can increase the air intake and enable the air to quickly enter the through holes from the side edge along the bottom of the ash pan, thereby preventing the air from being blocked by the bottom of the ash pan and recoil during air intake.

[0013] A wood-burning stove, comprising a stove body with an upper opening, a stove cavity formed in the stove body; characterized in that it also comprises a mesh ash pan assembly as described in any one of the above, the mesh ash pan assembly is arranged at the bottom of the stove cavity, a retaining edge is formed on the inner side of the stove body, and the mesh ash pan assembly is mounted on the retaining edge. In this technical solution, the mesh ash pan assembly is stably mounted on the retaining edge, and the edges are separated when it is lifted out, which is very convenient.

[0014] Preferably, the furnace body comprises an outer furnace wall and an inner furnace wall, an air inlet channel A is provided at the lower end of the side wall of the outer furnace wall, and an air inlet hole communicating with a plurality of through holes is provided at the bottom of the inner furnace wall; gaps are provided between the side wall and the bottom of the outer furnace wall and the side wall and the bottom of the inner furnace wall respectively; the air inlet hole and the air inlet channel A are communicated through the gap; an air inlet channel B is provided on the side wall at the upper end of the inner furnace wall, and the air inlet channel B and the air inlet channel A are communicated through the gap;

[0015] The inner furnace wall includes a lower chamber and a combustion chamber; the furnace chamber is formed in the combustion chamber, the air inlet is arranged at the bottom center of the lower chamber, the upper end edge of the lower chamber forms the rib outwardly, the upper part of the lower chamber extends into the furnace chamber to fix the rib to the inner wall of the combustion chamber, the splicing table is mounted on the rib, and the ash tray extends into the lower chamber.

[0016] In the above technical solution, the retaining edge is formed at the upper edge of the lower chamber, and no additional arrangement is required, so the structural integrity is good.

[0017] Preferably, the inner bottom of the outer furnace wall is sealed with a bottom plate, the upper end surface of the bottom plate is adjacently formed with a plurality of steps, the upper end of the bottom plate is formed with a groove in the middle and the periphery, and the lower end of the bottom plate is circumferentially provided with a plurality of legs; the upper opening of the inner furnace wall is provided with an end edge, the end edge is closed and connected with the upper end of the outer furnace wall, and a fire gathering ring is mounted on the end edge. In this technical solution, the bottom plate is alternately concave and convex, which increases the contact surface between the lower end of the bottom plate and the air and improves the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the mesh ash tray assembly.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the support net and the dust pan.

[0020] Figure 3 It is a schematic diagram of the front structure of a wood-burning stove with a mesh ash pan assembly.

[0021] Figure 4 for Figure 3 Schematic diagram of the AA section structure.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of a wood-burning stove with a mesh ash pan assembly.

[0023] Figure 6 Schematic diagram of the exploded structure of a wood stove with a mesh ash pan assembly.

[0024] Figure 7 Schematic diagram of the arrangement of ribs and air inlets in a wood-burning stove.

[0025] Figure 8 Schematic diagram of the arrangement of the base plate and legs on the wood stove. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0031] like Figure 1~2 A mesh ash pan assembly is shown, which is installed in a wood-burning stove 1, and includes a supporting mesh 2 and an ash pan 3 fixedly connected to each other, wherein the supporting mesh 2 is located above the ash pan 3, and is provided with a plurality of ash holes 4 so that ashes can fall into the ash pan 3 below, and a side wall of the ash pan 3 is provided with a plurality of through holes 5 communicating with the ash holes 4.

[0032] In the above technical solution, the mesh ash tray assembly includes a support net and an ash tray. The support net is used to support the combustible material (firewood, burning particle lamp), and the support net has an ash drop hole. The ashes after the combustible material is burned fall from the ash drop hole into the ash tray below, and the ash tray is used to receive the ashes. The mesh ash tray assembly is an integrated structure erected in the wood stove. After the wood stove is used, the mesh ash tray assembly can be taken out as a whole to pour out the ash. When pouring out the ash, the mesh ash tray assembly can be inverted to discharge the ash from the ash drop hole. It should be noted here that the ash drop hole is generally set smaller to prevent the combustible material from falling, and the ash tray is provided with a through hole on the side, which is used for ventilation to support combustion. When pouring out the ash, the mesh ash tray assembly can also be flipped to a certain angle to discharge the ash from here. The through hole is set larger, and it is easier to discharge the ash. Although the number is not as many as the ash drop hole, it is also a good way to discharge the ash. In addition, the mesh ash tray assembly can be detachably arranged in the wood stove, which is convenient for the replacement of the support net and can increase the service life of the wood stove.

[0033] Furthermore, the middle part of the support net 2 is extended upward and fixed with a handle 6. In this technical solution, the setting of the handle can facilitate the user to take out the mesh ash tray assembly to pour the ash, and it is more stable when taking out the mesh ash tray assembly to prevent the mesh ash tray assembly from tilting and pouring the ash into the furnace body.

[0034] Furthermore, the support net 2 is in a step-like shape, and the multiple steps are arranged from high to low from the inside to the outside. In this technical solution, the support net is in a step-like shape, so that a certain gap can be formed between the combustion object placed on the support net and the steps, thereby enhancing the ventilation effect between the support net surface and the combustion object and improving the combustion rate. The multiple steps are arranged from high to low from the inside to the outside, which can improve the overall deformation resistance of the support net and make it less likely to collapse.

[0035] Furthermore, the multiple steps are arranged regularly from high to low, and multiple ash holes 4 are regularly arranged on the multiple steps. In this technical solution, the multiple steps are arranged regularly from high to low to ensure the strength of the steps and avoid the step width being too large and easy to deform. In order to maintain stability, the ash holes on the top step are round holes, and the ash holes on the other steps are rounded square holes. These ash holes are regularly arranged, so that the air intake on the support net is relatively uniform and the combustion is fully uniform. In addition, the round hole and the rounded square hole have the same width, which can support the combustion of firewood and combustion particles.

[0036] Further, the edge of the mesh ash pan assembly is formed with a retaining ring mounted in the wood stove 1. In this technical solution, the retaining ring formed on the mesh ash pan assembly is mounted in the wood stove, and the retaining ring can be formed on the support net or on the ash pan.

[0037] Furthermore, the edge of the support net 2 extends upward to form a flange 7, the retaining ring is a splicing platform 8 formed on the upper inner side of the ash pan 3, the lower outer edge of the support net 2 is fixedly connected to the splicing platform 8, and the flange 7 is fixedly connected to the upper inner wall of the ash pan 3. In this technical solution, the flange of the support net is higher than the fixed area between the ash pans, which is more secure; the retaining ring is a splicing platform on the ash pan, which can maximize the volume of the ash pan and load the gravity of both onto the wood stove. If the retaining ring is formed on the support net, the ash pan is affected by gravity alone and the gravity of both is also loaded onto the wood stove, which increases instability.

[0038] Furthermore, the inner diameter of the ash pan 3 gradually decreases from top to bottom, and the multiple through holes 5 are regularly arranged on the side wall of the ash pan 3 in a circumferential direction. In this technical solution, the cross-section of the ash pan is in the shape of an inverted cone, and multiple through holes are arranged on the side wall of the pan body, so that the air coming in from the bottom can quickly flow along the inclined surface from the through holes to the support net, thereby increasing the air intake per unit time, and maximizing the volume of the pan body while ensuring ventilation, thereby increasing the amount of ash accumulation. It should also be noted here that the bottom of the ash pan is closer to the air inlet hole described below, and the bottom 100 of the ash pan is an upwardly concave arc surface, which can increase the air intake and enable the air to quickly enter the through holes from the side edge along the bottom surface of the ash pan, thereby preventing the air from being blocked by the bottom of the ash pan and rebounding during air intake. Example

[0039] like Figures 3 to 8 A wood-burning stove is shown, comprising a stove body 9 with an opening at the top and the mesh ash pan assembly in the first embodiment, a stove cavity 10 is formed in the stove body 9, the mesh ash pan assembly is arranged at the bottom of the stove cavity 10, a retaining edge 11 is formed on the inner side of the stove body 9, and the mesh ash pan assembly is mounted on the retaining edge 11. In this technical solution, the mesh ash pan assembly is stably mounted on the retaining edge, and the edges are separated when it is lifted out, which is very convenient.

[0040] Further, the furnace body 9 includes an outer furnace wall 12 and an inner furnace wall 13, an air inlet channel A14 is provided at the lower end of the side wall of the outer furnace wall 12, and an air inlet hole 15 communicating with the plurality of through holes 5 is provided at the bottom of the inner furnace wall 13; gaps are provided between the side wall and the bottom of the outer furnace wall 12 and the side wall and the bottom of the inner furnace wall 13 respectively; the air inlet hole 15 and the air inlet channel A14 are communicated through the gap; an air inlet channel B16 is provided on the side wall of the upper end of the inner furnace wall 13, and the air inlet channel B16 and the air inlet channel A14 are communicated through the gap;

[0041] The inner furnace wall 13 includes a lower chamber 17 and a combustion chamber 18; the furnace chamber 10 is formed in the combustion chamber 18, the air inlet 15 is arranged at the bottom center of the lower chamber 17, the upper end edge of the lower chamber 17 forms the retaining edge 11 outwardly, the upper part of the lower chamber 17 extends into the furnace chamber 10 to fix the retaining edge 11 to the inner wall of the combustion chamber 18, the splicing table 8 is mounted on the retaining edge 11, and the ash tray 3 extends into the lower chamber 17.

[0042] In the above technical solution, the retaining edge is formed at the upper edge of the lower chamber, and no additional arrangement is required, so the structural integrity is good.

[0043] Furthermore, a bottom plate 19 is provided at the bottom of the inner side of the outer furnace wall 12, and a plurality of steps are formed adjacent to the upper end surface of the bottom plate 19, a groove 20 is formed in the middle and outer periphery of the upper end of the bottom plate 19, and a plurality of legs 21 are provided circumferentially at the lower end of the bottom plate 19; an end edge 22 is provided at the upper opening of the inner furnace wall 13, and the end edge 22 is closed and connected to the upper end of the outer furnace wall 12, and a fire gathering ring 23 is provided on the end edge 22. In this technical solution, the bottom plate is alternately concave and convex, which increases the contact surface between the lower end of the bottom plate and the air and improves the heat dissipation effect.

[0044] In this specific embodiment, in order to solve the problems that it is inconvenient to empty the ash after the existing wood-burning stove is used, and the supporting net is welded in the stove body and is not easy to replace, the above scheme fixes the supporting net and the ash pan into a whole, that is, a mesh ash pan assembly, and the mesh ash pan assembly is mounted on the retaining edge in the stove body. After the wood-burning stove is used, the mesh ash pan assembly can be directly taken out to empty the ash, which is very convenient and greatly improves the convenience of use. In addition, if the supporting net is replaced, the mesh ash pan assembly can be directly replaced without replacing and maintaining the stove body, which is also very convenient.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A mesh ash tray assembly, characterized in that: The mesh ash tray assembly is mounted in a wood-burning stove (1), and comprises a support mesh (2) and an ash tray (3) that are fixedly connected to each other, the support mesh (2) being located above the ash tray (3), the support mesh (2) being provided with a plurality of ash dropping holes (4) so ​​that ashes can fall into the ash tray (3) below, and a side wall of the ash tray (3) being provided with a plurality of through holes (5) that are in communication with the ash dropping holes (4).

2. A mesh ash tray assembly according to claim 1, characterized in that: A handle (6) is fixedly provided on the middle part of the support net (2) extending upward.

3. A mesh ash tray assembly according to claim 2, characterized in that: The support net (2) is in the shape of a step, and the multiple layers of steps formed are arranged from high to low from the inside to the outside.

4. A mesh ash tray assembly according to claim 3, characterized in that: The multiple layers of steps are regularly arranged from high to low, and multiple ash dropping holes (4) are regularly arranged on the multiple layers of steps.

5. The mesh ash tray assembly according to claim 1, characterized in that: The edge of the mesh ash pan assembly is formed with a retaining ring mounted inside the wood-burning stove (1).

6. A mesh ash tray assembly according to claim 5, characterized in that: The edge of the support net (2) extends upward to form a flange (7), the retaining ring is a splicing platform (8) formed on the upper inner side of the ash accumulation tray (3), the lower outer edge of the support net (2) is fixedly connected to the splicing platform (8), and the flange (7) is fixedly connected to the upper inner wall of the ash accumulation tray (3).

7. A mesh ash tray assembly according to claim 6, characterized in that: The inner diameter of the ash accumulation tray (3) gradually decreases from top to bottom, and the plurality of through holes (5) are regularly arranged on the side wall of the ash accumulation tray (3) in the circumferential direction.

8. A wood-fired stove, comprising a stove body (9) with an opening at the top, wherein a stove cavity (10) is formed in the stove body (9); characterized in that: It also comprises a mesh ash pan assembly as claimed in any one of claims 1 to 7, wherein the mesh ash pan assembly is arranged at the bottom of the furnace cavity (10), a retaining edge (11) is formed on the inner side of the furnace body (9), and the mesh ash pan assembly is mounted on the retaining edge (11).

9. A wood-fired stove according to claim 8, characterized in that: The furnace body (9) comprises an outer furnace wall (12) and an inner furnace wall (13); an air intake channel A (14) is provided at the lower end of the side wall of the outer furnace wall (12); an air intake hole (15) communicating with a plurality of through holes (5) is provided at the bottom of the inner furnace wall (13); gaps are provided between the side wall and the bottom of the outer furnace wall (12) and the side wall and the bottom of the inner furnace wall (13); the air intake hole (15) and the air intake channel A (14) are communicated through the gap; an air intake channel B (16) is provided on the side wall at the upper end of the inner furnace wall (13); the air intake channel B (16) and the air intake channel A (14) are communicated through the gap; The inner furnace wall (13) comprises a lower chamber (17) and a combustion chamber (18); the furnace chamber (10) is formed in the combustion chamber (18); the air inlet (15) is arranged at the bottom center of the lower chamber (17); the upper edge of the lower chamber (17) forms the retaining edge (11) in the outward circumferential direction; the upper part of the lower chamber (17) extends into the furnace chamber (10) so that the retaining edge (11) is fixed to the inner wall of the combustion chamber (18); the splicing platform (8) is mounted on the retaining edge (11); and the ash tray (3) extends into the lower chamber (17).

10. A wood-fired stove according to claim 9, characterized in that: The inner bottom of the outer furnace wall (12) is sealed with a bottom plate (19), the upper end surface of the bottom plate (19) is adjacently formed with a plurality of steps, a groove (20) is formed in the middle and outer periphery of the upper end of the bottom plate (19), and a plurality of supporting legs (21) are circumferentially provided at the lower end of the bottom plate (19); an end edge (22) is provided at the opening of the upper end of the inner furnace wall (13), the end edge (22) is closed and connected to the upper end of the outer furnace wall (12), and a fire gathering ring (23) is mounted on the end edge (22).

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