Rolling brush device and cleaning equipment

Abstract

The invention relates to a rolling brush device and cleaning equipment. The rolling brush device comprises a rolling brush cylinder, a guide groove is formed in the rolling brush cylinder in the circumferential direction, the guide groove divides the rolling brush cylinder into two parts in the axis direction, brush strips opposite in spiral direction are fixedly arranged on the two parts of the rolling brush cylinder respectively, and a cutting structure corresponding to the guide groove is further arranged in the rolling brush cylinder. The cutting structure is always located in the rolling brush cylinder and can cut off hair in the guide groove. Brush strips with opposite spiral directions are fixedly arranged on the two parts of the rolling brush cylinder, so that the rolling brush cylinder drives the brush strips to rotate to convey wound hair to a guide groove, and cutting operation of a follow-up cutting structure is facilitated; besides, the guide groove is formed, and the cutting structure is always located in the rolling brush cylinder in cooperation with the guide groove, so that on the premise that the cutting structure can normally cut off hair in the guide groove, it is ensured that the cutting structure is always located in the rolling brush cylinder in the cutting process, and the situation that a blade of the cutting structure is exposed to cause potential safety hazards is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field related to cleaning equipment, and in particular to a roller brush device and a cleaning equipment. Background Art

[0002] The roller brush device of the cleaning equipment is prone to entangle a lot of filaments such as hair during the cleaning process, making the roller brush device difficult to clean.

[0003] The conventional roller brush device is provided with a cutting assembly, which can cut hair or other filaments wound around the roller brush. After the hair or other filaments are cut, they can be easily cleaned up after falling off.

[0004] The blade of a traditional cutting assembly is either installed on the side wall of the roller brush cavity to achieve cutting, or installed inside the roller brush, and cutting is achieved by extending the blade out of the roller brush. As a result, when the user removes the roller brush for maintenance or cleaning, the user's hands may directly contact the blade, posing a risk of scratches. Summary of the invention

[0005] Based on this, it is necessary to provide a roller brush device and cleaning equipment that will not be scratched when the roller brush is disassembled and has good safety performance to address the problem that the blades of the current roller brush device are exposed outside the roller brush and there is a risk of scratches.

[0006] The present application first provides a roller brush device, including a roller brush cylinder, wherein the roller brush cylinder is provided with a guide groove along the circumferential direction, and the guide groove divides the roller brush cylinder into two parts along the axial direction, and the two parts of the roller brush cylinder are respectively fixed with brush strips with opposite spiral directions, and a cutting structure corresponding to the guide groove is also provided inside the roller brush cylinder, and the cutting structure is always located inside the roller brush cylinder and can cut off the hair in the guide groove.

[0007] In one embodiment, the cutting direction of the cutting structure is parallel to the axial direction of the roller brush barrel.

[0008] In one embodiment, the cutting structure includes a tool assembly and a drive assembly; the tool assembly includes a fixed knife and a movable knife arranged along the radial direction of the roller brush cylinder, the fixed knife is fixed in the roller brush cylinder and is in a hollow cylindrical shape, the movable knife is rotatably connected to the fixed knife, and cutting grooves corresponding to the guide grooves are respectively provided at both ends of the fixed knife, and the cutting grooves penetrate the side walls of the fixed knife along the radial direction of the fixed knife; blade edges corresponding to the cutting grooves are provided at both ends of the movable knife, and the blade edges open outward along the radial direction of the movable knife; the drive assembly can drive the movable knife to rotate relative to the fixed knife.

[0009] In one embodiment, two opposite cutting grooves are formed on each side end of the fixed knife.

[0010] In one embodiment, the depth of the blade along the radial direction of the movable blade is greater than or equal to the depth of the cutting groove along the radial direction of the fixed blade.

[0011] In one embodiment, the driving assembly includes a swing bar, a fixed paddle and a connecting shaft, the connecting shaft is parallel to the roller brush barrel and the two are rotatably connected, the fixed paddle is fixedly provided at one end of the connecting shaft, and the other end is fixed to the outside, the fixed paddle has a paddle portion eccentrically arranged with respect to the axis of the connecting shaft; the fixed knife is provided with a swing groove extending along its own circumferential direction inside and outside, one end of the swing bar passes through the swing groove to be fixed to the movable knife, and the other end is provided with a paddle groove capable of engaging with the paddle portion.

[0012] In one of the embodiments, the end surfaces on both sides of the fixed knife are flush with the side surfaces of the roller brush cylinder.

[0013] In one embodiment, the roller brush barrel includes two roller brush parts and a guide part located between the two roller brush parts, the guide groove is opened in the guide part, the guide groove divides the guide part into two truncated cone-shaped parts, and the cross-sectional areas of the two parts of the guide part decrease toward the side close to the guide groove.

[0014] The second aspect of the present application provides a cleaning device, including a roller brush shell, a motor and the above-mentioned roller brush device, the motor is fixed in the roller brush shell, the roller brush shell is provided with a roller brush cavity, the roller brush cylinder is arranged in the roller brush cavity and fixedly connected to the output shaft of the motor.

[0015] In one of the embodiments, a pressing platform corresponding to the guide groove is fixedly provided on the inner wall of the rolling brush cavity, the pressing platform extends along the circumference of the rolling brush cavity, and each side surface of the pressing platform faces the guide groove.

[0016] The above-mentioned roller brush device is provided with brush strips with opposite spiral directions on the two parts of the roller brush cylinder, so that after the roller brush cylinder starts to rotate, the rotation of the brush strips can transport the hair wrapped on the two parts of the roller brush cylinder to the guide groove, so as to facilitate the subsequent cutting operation of the cutting structure; in addition, by providing a guide groove, the cutting structure is always located inside the roller brush cylinder, thereby ensuring that the cutting structure can normally cut off the hair in the guide groove. The cutting structure is always located inside the roller brush cylinder during the cutting process to prevent the blade of the cutting structure from being exposed, causing a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the roller brush device of the present application;

[0018] Figure 2 for Figure 1Schematic diagram of the three-dimensional structure after the scraper strip is hidden;

[0019] Figure 3 for Figure 2 A schematic diagram of the three-dimensional result after partially hiding the roller brush from another angle;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged result at A in the middle;

[0021] Figure 5 for Figure 2 A schematic diagram of the three-dimensional structure of the lower guide part from another angle;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the roller brush housing and the roller brush device in the cleaning device of the present application;

[0023] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure after the scraper is hidden from another angle;

[0024] Figure 8 for Figure 6 Schematic diagram of the three-dimensional structure with part of the roller brush device hidden in the figure.

[0025] Figure numerals: 100, roller brush cylinder; 100a, brush bar; 110, guide portion; 111, guide groove; 120, roller brush portion; 10, tool assembly; 11, fixed knife; 11a, cutting groove; 11b, swing groove; 12, movable knife; 12a, knife edge; 20, driving assembly; 21, swing bar; 21a, paddle groove; 22, fixed paddle; 22a, paddle portion; 23, connecting shaft; 200, roller brush housing; 210, roller brush cavity; 211, press table. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[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", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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 invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] Please combine Figure 1 as well as Figure 2 As shown, the present application first provides a roller brush device, including a roller brush barrel 100, which is provided with a guide groove 111 along the circumferential direction. The guide groove 111 divides the roller brush barrel 100 into two parts along the axial direction. Brush strips 100a with opposite spiral directions are respectively fixed on the two parts of the roller brush barrel 100. A cutting structure corresponding to the guide groove 111 is also provided inside the roller brush barrel 100. The cutting structure is always located inside the roller brush barrel 100 and can cut off the hair in the guide groove 111.

[0033] In the present application, since the two parts of the roller brush barrel 100 are fixed with brush strips 100a with opposite spiral directions, when the roller brush barrel 100 starts to rotate, the rotation of the brush strips 100a can transport the hair entangled on the two parts of the roller brush barrel 100 to the guide groove 111, so as to facilitate the subsequent cutting operation of the cutting structure.

[0034] In addition, by providing the guide groove 111 and cooperating with the cutting structure to always be located inside the roller brush barrel 100, the cutting structure can be ensured to always be located inside the roller brush barrel 100 during the cutting process, while ensuring that the cutting structure can normally cut off the hair in the guide groove 111, thereby preventing the blade of the cutting structure from being exposed, causing a safety hazard.

[0035] Please combine Figure 2 , Figure 3 as well as Figure 4 As shown, in some embodiments, the cutting direction of the cutting structure is parallel to the axial direction of the roller brush cylinder 100 .

[0036] It should be noted that the cutting direction of the conventional cutting structure is mostly along the radial direction or the circumferential direction of the roller brush cylinder 100; however, in the actual process of disassembling the roller brush cylinder 100, if the user's fingers touch the guide groove 111, part of the fingers may fall into the guide groove 111 under the action of pressure;

[0037] It can be understood that if the cutting structure is for radial cutting along the radial direction of the roller brush barrel 100, the cutting edge of the blade of the cutting structure faces outward, and the user's finger still exists The possibility of being scratched by the cutting edge when pressing the guide groove 111; if the cutting structure is for circumferential cutting along the circumferential direction of the roller brush barrel 100, that is, cutting is performed circumferentially along the guide groove 111, the blade of the cutting structure is always located in the guide groove 111 and is always exposed to the outside world through the guide groove 111. When the user's finger just presses the guide groove 111, there is still a possibility of being stabbed by the tip of the blade.

[0038] In the present application, the cutting structure performs cutting along an axial direction parallel to the roller brush barrel 100. Therefore, cutting will only be performed when the blade of the cutting structure moves to correspond to the guide groove 111. At the same time, only at this time will the blade be directly exposed to the outside through the guide groove 111. In other cases, the blade is always hidden inside the roller brush barrel 100. Therefore, when the roller brush device stops working, the blade of the cutting structure is most likely not corresponding to the guide groove 111, that is, the blade is most likely hidden inside the roller brush barrel 100, and naturally there is no possibility of scratching the user, which further increases the safety of the roller brush device of the present application.

[0039] In some embodiments, the blade of the cutting structure is located inside the roller brush cylinder 100 and reciprocates parallel to the axis direction of the roller brush cylinder 100 . The blade has a cutting edge, and when the cutting edge passes through the guide groove 111 , a cutting is completed.

[0040] In some embodiments, the blade of the cutting structure rotates around the radial direction of the roller brush cylinder 100 , and the blade has a cutting edge. When the cutting edge passes through the guide groove 111 , a cutting is completed.

[0041] Of course, the blades of the cutting structure may also be arranged in other ways and have other movement trajectories, as long as the blade edge moves in a direction parallel to the axial direction of the roller brush 100 at the moment of passing through the guide groove 111 and completing the cutting, the present application does not make any further limitations here.

[0042] Please refer to Figure 4 As shown, in some embodiments, the cutting structure includes a tool assembly 10 and a drive assembly 20; the tool assembly 10 includes a fixed knife 11 and a movable knife 12 arranged along the radial direction of the roller brush cylinder 100, the fixed knife 11 is fixed in the roller brush cylinder 100 and is in a hollow cylindrical shape, the movable knife 12 is rotatably connected to the fixed knife 11, and cutting grooves 11a corresponding to the guide grooves 111 are respectively provided at both ends of the fixed knife 11, and the cutting grooves 11a penetrate the side walls of the fixed knife 11 along the radial direction of the fixed knife 11; blade edges 12a corresponding to the cutting grooves 11a are provided at both ends of the movable knife 12, and the blade edges 12a open outwardly along the radial direction of the movable knife 12; the drive assembly 20 can drive the movable knife 12 to rotate relative to the fixed knife 11.

[0043] The cutting groove 11a and the blade 12a are both opened outward in the radial direction of the roller brush drum 100, so that the roller brush drum 100 starts to rotate. The rotation of the brush strip 100a can transport the hair wrapped around the two parts of the roller brush drum 100 to the guide groove 111. When the movable knife 12 rotates to the point where the blade 12a corresponds to the cutting groove 11a, the hair can be embedded in the blade 12a, and the hair can be cut off along the cutting groove 11a and the blade 12a through the rotation of the movable knife 12.

[0044] Of course, in some embodiments, the movable knife 12 may be on the outside and the fixed knife 11 may be on the inside, as long as the movable knife 12 rotates relative to the fixed knife 11 to cut the hair between the cutting groove 11a and the blade 12a.

[0045] Please refer to Figure 4 As shown, in some embodiments, two opposite cutting grooves 11a are provided on each side end of the fixed knife 11; and the two side ends have a total of four cutting points, so as to enhance the cutting effect by increasing the cutting points of the cutting structure for entangled hair, thereby enhancing the cleaning effect.

[0046] Please refer to Figure 4 As shown, in some embodiments, the depth of the blade 12a along the radial direction of the movable blade 12 is greater than or equal to the depth of the cutting groove 11a along the radial direction of the fixed blade 11; to ensure that when the movable blade 12 rotates to the point where the blade 12a corresponds to the cutting groove 11a and the hair is embedded in the blade 12a, the rotation of the movable blade 12 can completely cut off the hair embedded in the blade 12a, so as to enhance the cutting effect.

[0047] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, the driving assembly 20 includes a swing bar 21, a fixed paddle 22 and a connecting shaft 23. The connecting shaft 23 is parallel to the roller brush barrel 100 and the two are rotatably connected. A fixed paddle 22 is fixed at one end of the connecting shaft 23, and the other end is fixed to the outside. The fixed paddle 22 has a paddle portion 22a that is eccentrically arranged with the axis of the connecting shaft 23; the fixed knife 11 is provided with a swing groove 11b extending along its own circumferential direction inside and outside, one end of the swing bar 21 passes through the swing groove 11b to be fixed to the movable knife 12, and the other end is provided with a paddle groove 21a that can be engaged with the paddle portion 22a.

[0048] The roller brush barrel 100 can rotate when driven by an external driving member, so that the floor can be cleaned by rotating the brush strip 100a. Since one end of the connecting shaft 23 is fixed to the roller brush housing 200, and the connecting shaft 23 is rotationally connected to the roller brush barrel 100, when the roller brush device is in actual working state, the roller brush barrel 100 rotates and the connecting shaft 23 remains fixed.

[0049] Since the roller brush cylinder 100 and the connecting shaft 23 are in relative rotation, in order to facilitate understanding of the driving process, the roller brush cylinder 100 is regarded as fixed and the connecting shaft 23 is regarded as rotating in the following text. Then the connecting shaft 23 drives the fixed paddle 22 to rotate, thereby driving the eccentric paddle portion 22a to rotate around the axis of the connecting shaft 23. Since the paddle portion 22a is engaged with the paddle groove 21a of the swing bar 21, and the fixed knife 11 fixed in the roller brush cylinder 100 is also regarded as fixed, as the paddle portion 22a rotates, the swing bar 21 can swing back and forth along the swing groove 11b driven by the paddle portion 22a, thereby driving the movable knife 12 to rotate back and forth in the fixed knife 11.

[0050] In actual working state, the roller brush 100 drives the cutter assembly 10 to rotate, and the movable cutter 12 always reciprocates relative to the fixed cutter 11 to achieve cutting.

[0051] Please refer to Figure 2 As shown, in some embodiments, the roller brush barrel 100 includes two roller brush portions 120 and a guide portion 110 located between the two roller brush portions 120, a guide groove 111 is opened in the guide portion 110, the guide groove 111 divides the guide portion 110 into two truncated cone-shaped parts, and the cross-sectional areas of the two parts of the guide portion 110 decrease toward the side close to the guide groove 111.

[0052] The beveled outer surface of the guide portion 110 can play a certain guiding effect, guiding the hair wrapped around the outer periphery of the roller brush 100 into the guide groove 111, so as to facilitate the subsequent cutting by the cutting structure, thereby effectively increasing the cutting success rate.

[0053] Of course, other guide structures may be provided on the surface of the roller brush barrel 100 or the inner wall of the roller brush chamber 210 , as long as they can guide the hair into the guide groove 111 in coordination with the rotation of the brush strip 100 a . This application does not make any further limitations here.

[0054] Please refer to Figure 5 As shown, in some embodiments, the end surfaces of both sides of the fixed knife 11 are flush with the side surfaces of the roller brush cylinder 100 respectively; so that the end surface of the fixed knife 11 can also play a certain guiding effect, further increasing the cutting success rate.

[0055] Please refer to Figure 6 As shown, the second aspect of the present application provides a cleaning device, including a roller brush housing 200, a motor and the above-mentioned roller brush device, the motor is fixed in the roller brush housing 200, the roller brush housing 200 is provided with a roller brush cavity 210, the roller brush cylinder 100 is arranged in the roller brush cavity 210 and is fixedly connected to the output shaft of the motor.

[0056] Please combine Figure 7 as well as Figure 8As shown, in some embodiments, a pressing platform 211 corresponding to the guide groove 111 is fixedly provided on the inner wall of the rolling brush cavity 210 , and the pressing platform 211 extends along the circumference of the rolling brush cavity 210 , and each side surface of the pressing platform 211 faces the guide groove 111 .

[0057] The pressing platform 211 can also play a certain guiding role on the hair, further increasing the cutting success rate.

[0058] In some embodiments, one end of the pressing platform 211 along the circumferential direction is opposite to the hair discharge port on the roller brush housing 200 .

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A roller brush device, characterized in that: The invention comprises a roller brush cylinder (100), wherein the roller brush cylinder (100) is provided with a guide groove (111) along the circumferential direction, wherein the guide groove (111) divides the roller brush cylinder (100) into two parts along the axial direction, wherein brush strips (100a) with opposite spiral directions are respectively fixed on the two parts of the roller brush cylinder (100), and a cutting structure corresponding to the guide groove (111) is also provided inside the roller brush cylinder (100), wherein the cutting structure is always located inside the roller brush cylinder (100) and can cut off the hair in the guide groove (111).

2. The roller brush device according to claim 1, characterized in that: The cutting direction of the cutting structure is parallel to the axial direction of the roller brush barrel (100).

3. The roller brush device according to claim 2, characterized in that: The cutting structure comprises a cutter assembly (10) and a drive assembly (20); The tool assembly (10) comprises a fixed knife (11) and a movable knife (12) arranged along the radial direction of the roller brush cylinder (100); the fixed knife (11) is fixedly arranged in the roller brush cylinder (100) and is in the shape of a hollow cylinder; the movable knife (12) is rotatably connected to the fixed knife (11); cutting grooves (11a) corresponding to the guide grooves (111) are respectively provided at both ends of the fixed knife (11); the cutting grooves (11a) penetrate the side wall of the fixed knife (11) along the radial direction of the fixed knife (11); cutting edges (12a) corresponding to the cutting grooves (11a) are provided at both ends of the movable knife (12); the cutting edges (12a) are open outward along the radial direction of the movable knife (12); and the driving assembly (20) is capable of driving the movable knife (12) to rotate relative to the fixed knife (11).

4. The roller brush device according to claim 3, characterized in that: Each side end of the fixed knife (11) is provided with two opposite cutting grooves (11a).

5. The roller brush device according to claim 3, characterized in that: The depth of the blade edge (12a) along the radial direction of the movable blade (12) is greater than or equal to the depth of the cutting groove (11a) along the radial direction of the fixed blade (11).

6. The roller brush device according to claim 3, characterized in that: The driving assembly (20) comprises a swing bar (21), a fixed paddle (22) and a connecting shaft (23); the connecting shaft (23) is parallel to the roller brush barrel (100) and the two are rotatably connected; one end of the connecting shaft (23) is fixedly provided with the fixed paddle (22), and the other end is fixed to the outside; the fixed paddle (22) has a paddle portion (22a) eccentrically arranged with respect to the axis of the connecting shaft (23); the fixed knife (11) is provided with a swing groove (11b) extending along its own circumferential direction through the inside and outside; one end of the swing bar (21) passes through the swing groove (11b) to be fixed to the movable knife (12), and the other end is provided with a paddle groove (21a) capable of engaging with the paddle portion (22a).

7. The roller brush device according to claim 3, characterized in that: The end surfaces on both sides of the fixed knife (11) are respectively flush with the side surfaces of the roller brush cylinder (100).

8. The roller brush device according to claim 7, characterized in that: The roller brush cylinder (100) comprises two roller brush portions (120) and a guide portion (110) located between the two roller brush portions (120); the guide groove (111) is provided in the guide portion (110); the guide groove (111) divides the guide portion (110) into two truncated cone-shaped portions; and the cross-sectional areas of the two portions of the guide portion (110) decrease gradually toward a side close to the guide groove (111).

9. A cleaning device, characterized in that: It comprises a roller brush housing (200), a motor and a roller brush device as claimed in any one of claims 1 to 8, wherein the motor is fixedly arranged in the roller brush housing (200), the roller brush housing (200) is provided with a roller brush cavity (210), and the roller brush cylinder (100) is arranged in the roller brush cavity (210) and is fixedly connected to the output shaft of the motor.

10. The cleaning device according to claim 9, characterized in that A pressing platform (211) corresponding to the guide groove (111) is fixedly provided on the inner wall of the rolling brush cavity (210); the pressing platform (211) extends along the circumference of the rolling brush cavity (210), and each side surface of the pressing platform (211) faces the guide groove (111).

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