Sealing element and dust collector cleaning head with same

Abstract

The utility model provides a sealing element and a dust collector cleaning head with the sealing element. The sealing piece is used for improving the sealing performance of a cleaning head of the dust collector and a surface to be cleaned in the direction away from the movement direction of the cleaning head, and at least one guide channel communicated with a dust collection opening of the cleaning head is formed in the bottom of the cleaning head. The fixing part is arranged on the edge of one side of the dust suction port, the channel sealing parts are arranged corresponding to the guide channels respectively, the bottom plate sealing part is used for making contact with the surface to be cleaned, and the channel sealing parts are used for conducting or blocking the corresponding guide channels. And the bottom plate sealing part drives the channel sealing part to deflect between the conducting position and the blocking position in the moving process of the cleaning head. According to the utility model, the bottom plate sealing part is always sealed with the surface to be cleaned to a certain degree, and the channel sealing part can block the corresponding guide channel when the dust suction port moves towards the direction deviating from the sealing element, so that the sealing performance of the cleaning head and the surface to be cleaned in the direction deviating from the moving direction is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust catcher technical field, in particular to a sealing element and have the dust catcher cleaning head of sealing element. BACKGROUND

[0002] In the prior art, in order to improve the cleaning ability of the floor brush of the dust catcher to large size dust, a guide channel communicating with the dust suction port is arranged at the bottom of the floor brush, but due to the increase of the spacing between the bottom of the floor brush and the ground, the suction force of the floor brush to the ground is reduced, which affects the cleaning effect. Considering comprehensively, a sealing element suitable for blocking the guide channel and a dust catcher cleaning head having the sealing element need to be provided in the design. SUMMARY

[0003] One object of the first aspect of the utility model is to overcome at least one technical defect in the prior art and provide a sealing element and a dust catcher cleaning head having the sealing element.

[0004] A further object of the first aspect of the utility model is to improve the sealing performance of the cleaning head and the surface to be cleaned in the direction away from the movement direction.

[0005] Another further object of the first aspect of the utility model is to improve the deformation reset ability of the sealing element and prolong the service life of the sealing element.

[0006] One object of the second aspect of the utility model is to provide a dust catcher cleaning head having the sealing element.

[0007] According to the first aspect of the utility model, a sealing element is provided for improving the sealing performance of the cleaning head of a dust catcher and the surface to be cleaned in the direction away from the movement direction of the cleaning head. The bottom of the cleaning head is provided with at least one guide channel communicating with the dust suction port of the cleaning head. The sealing element comprises:

[0008] At least one fixed part is arranged at the edge of one side of the dust suction port;

[0009] At least one channel sealing part is arranged corresponding to each guide channel for opening or blocking the corresponding guide channel; and

[0010] At least one bottom plate sealing part is used for contacting the surface to be cleaned and driving the channel sealing part to deflect between the opening position and the blocking position during the movement of the cleaning head.

[0011] The sealing piece is in contact and friction with the surface to be cleaned in the movement process of the cleaning head through the bottom plate sealing part, drives the channel sealing part to deflect between the open position and the block position, not only the bottom plate sealing part keeps sealing with the surface to be cleaned to a certain extent, but also the channel sealing part can open the corresponding guide channel when the dust suction port moves towards the sealing piece and block the corresponding guide channel when the dust suction port moves away from the sealing piece, improves the sealing performance of the cleaning head and the surface to be cleaned in the direction away from the movement direction, and further improves the cleaning efficiency and cleaning effect of the dust collector.

[0012] Further, the channel sealing part and the bottom plate sealing part are alternately arranged in the width direction of the guide channel.

[0013] The channel sealing part and the bottom plate sealing part are alternately arranged in the width direction of the guide channel, that is, the projection of the channel sealing part in the length direction of the guide channel is located in the guide channel, and the projection of the bottom plate sealing part in the length direction of the guide channel is located between adjacent two guide channels or between the guide channel and the edge of the cleaning head, so as to avoid that the bottom plate sealing part blocks the guide channel, and make the dust completely enter the dust suction port from the guide channel, and further improve the suction force of the cleaning head.

[0014] Further, the sealing piece further comprises:

[0015] The connecting part is arranged to be connected with the at least one fixed part, and comprises a first connecting section connected with the at least one channel sealing part and a second connecting section connected with the at least one bottom plate sealing part; wherein,

[0016] The size of the first connecting section in the extension direction of the connecting part relative to the fixed part is smaller than the size of the second connecting section in the direction.

[0017] The channel sealing part and the bottom plate sealing part are connected by the connecting part, which not only facilitates the installation of the sealing piece and ensures the structural strength of the sealing piece, but also can be deformed under the stress of the bottom plate sealing part, thereby driving the channel sealing part to deflect, the overall structure is simple and ingenious, the production cost is reduced, and the movement reliability of the channel sealing part is improved.

[0018] Further, the bottom plate sealing part comprises:

[0019] The first supporting rib is arranged to be in contact with the surface to be cleaned when the movement direction of the cleaning head is the same as the direction of the sealing piece relative to the dust suction port, and makes the channel sealing part be in the open position; and

[0020] A second support rib is arranged to contact the surface to be cleaned and to place the passage seal portion in the blocking position when the movement direction of the cleaning head is opposite to the direction of the seal relative to the suction port.

[0021] The first support rib and the second support rib of the bottom plate seal portion contact the surface to be cleaned when the passage seal portion is in the conducting position and the blocking position respectively, which not only facilitates the production and processing of the seal, but also facilitates switching the support rib contacting the surface to be cleaned when the movement state of the cleaning head changes, effectively driving the passage seal portion to deflect.

[0022] Further, the projections of the first support rib and the passage seal portion in the length direction of the guide passage are arranged on both sides of the second support rib respectively; and

[0023] The passage seal portion is arranged to extend in an arc shape away from the second support rib.

[0024] The first support rib and the second support rib of the passage seal portion and the bottom plate seal portion are not coplanar, and the passage seal portion extends outward in an arc shape relative to the second support rib to form a free end, which not only facilitates the deformation and reset of the seal and the deflection of each seal portion, but also enables the passage seal portion to cooperate with the opening periphery of the mounting groove of the cleaning head to achieve the maximum conduction of the guide passage.

[0025] Further, the included angle between the projection of the passage seal portion and the second support rib in the longitudinal direction of the seal is 30°-60°; and / or

[0026] The included angle between the projection of the first support rib and the second support rib in the longitudinal direction of the seal is smaller than the included angle between the projection of the passage seal portion and the second support rib in the longitudinal direction.

[0027] The projection included angle range of the passage seal portion and the second support rib is set to 30°-60°, and the projection included angle of the first support rib and the second support rib is smaller than the projection included angle of the passage seal portion and the second support rib, which can ensure that the bottom plate seal portion effectively drives the passage seal portion to deflect, and reduce the deformation of the first support rib relative to the second support rib, thereby improving the sealing reliability of the passage seal portion and the bottom plate seal portion.

[0028] Further, the seal further comprises:

[0029] A connecting portion is arranged to connect the fixed portion and at least one of the passage seal portion and the bottom plate seal portion; wherein the fixed portion comprises:

[0030] A mounting strip is arranged at the longitudinal middle part of the connecting part and is connected with the connecting part, and is matched with the mounting groove of the cleaning head to fix the sealing member relative to the cleaning head.

[0031] The sealing member is fixed by matching the mounting strip with the mounting groove of the cleaning head, and the connecting part is connected to the longitudinal middle part of the mounting strip, so that the sealing member can be reliably mounted, the deformation reset capability of the connecting part relative to the mounting strip is improved, and the service life of the sealing member is prolonged.

[0032] Further, the fixing part further comprises:

[0033] A positioning strip is arranged on the side of the mounting strip away from the connecting part and has a semicircular cross section; wherein,

[0034] The geometric center of the positioning strip is located on the extension line of the longitudinal central axis of the connecting part.

[0035] The semicircular positioning strip arranged on the side of the mounting strip away from the connecting part can make the fixing part and the mounting groove more closely matched, further improve the mounting reliability of the sealing member, avoid the overall deviation of the sealing member, and further improve the structural strength and deformation capability of the sealing member.

[0036] According to the second aspect of the present application, a cleaning head of a dust collector is provided, comprising:

[0037] A housing has a dust suction port and at least one guide channel located on at least one side of the dust suction port in the front-rear direction, and the guide channel is arranged to communicate with the dust suction port; and

[0038] At least one sealing member according to any one of the above is arranged at the edge of one side of the dust suction port in the front-rear direction.

[0039] The dust collector cleaning head of the present application is provided with a sealing member at the front edge and / or rear edge of the dust suction port, which can improve the sealing performance of the cleaning head and the surface to be cleaned in the direction away from the movement direction, thereby improving the cleaning efficiency and effect of the dust collector, and enabling the cleaning head to be provided with guide channels on both sides without affecting the suction force, and enabling efficient dust cleaning in both forward and backward movements.

[0040] Further, the bottom of the housing is formed with a mounting groove with an opening facing the surface to be cleaned, and the fixing part is arranged in the mounting groove; and

[0041] A plurality of limiting protrusions are arranged on both sides of the opening of the mounting groove, for limiting the movement of the fixing part in the height direction of the cleaning head; wherein,

[0042] The plurality of limiting protrusions are arranged at positions corresponding to the bottom plate sealing part of the mounting slot.

[0043] The plurality of limiting protrusions are arranged at positions corresponding to the bottom plate sealing part of the mounting slot.

[0044] The above and other objects, advantages and features of the present utility model will become more apparent from the following detailed description of the preferred embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0045] Some specific embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings, which are given by way of illustration only and thus are not limitative of the present utility model. Identical reference numerals in the drawings refer to the same or similar components or parts. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:

[0046] Figure 1 is a schematic cross-sectional view of a cleaner head of a dust extractor according to one embodiment of the present utility model, wherein the cleaner head is in a suspended state;

[0047] Figure 2 is Figure 1 a schematic isometric view of the middle housing, wherein the front mounting slot is provided with a sealing element;

[0048] Figure 3 is Figure 1 a schematic isometric view of the sealing element;

[0049] Figure 4 is Figure 1 a schematic cross-sectional view of the cleaner head shown in Fig. 1 when moving forward;

[0050] Figure 5 is Figure 1 a schematic cross-sectional view of the cleaner head shown in Fig. 1 when moving backward.

[0051] LIST OF REFERENCE NUMERALS

[0052] cleaner head 100; housing 110; suction port 111; front guide channel 112a; rear guide channel 112b; front mounting slot 113a; rear mounting slot 113b; accommodating part 1131; shape fitting part 1132; limiting protrusion 114; pipe 120; brush roller 130;

[0053] Front side seal 200a; rear side seal 200b; fixing portion 210; mounting strip 211; positioning strip 212; passage seal portion 220; bottom plate seal portion 230; first support rib 231; second support rib 232; connecting portion 240; first connecting section 241; second connecting section 242. DETAILED DESCRIPTION

[0054] Figure 1 is a schematic cross-sectional view of a cleaner head 100 of a dust cleaner according to an embodiment of the present application, wherein the cleaner head 100 is in a floating state. Referring to Figure 1 , the cleaner head 100 of the dust cleaner can include a housing 110 formed with a receiving cavity, and a duct 120 partially disposed in the receiving cavity.

[0055] The bottom of the housing 110 can be formed with a suction port 111. The duct 120 can be used to communicate with a main machine of the dust cleaner to collect dust sucked from the suction port 111.

[0056] The receiving cavity of the housing 110 can be provided with a brush roller 130 at a position corresponding to the suction port 111 for cleaning a surface to be cleaned. Exemplarily, the cleaner head 100 can be a floor brush.

[0057] The bottom of the housing 110 can also be formed with at least one guide channel 112 communicating with the suction port 111, located on at least one side of the suction port 111 in the front-rear direction, so as to facilitate the suction of large-size dust. In the present application, the at least one is one, two, or more.

[0058] Figure 2 is a schematic isometric view of the housing 110 in Figure 1 , wherein the front side mounting groove 113a is provided with a seal 200. Referring to Figure 2 , the housing 110 can be provided with guide channels 112 on the front side and the rear side of the suction port 111, respectively, so as to achieve efficient dust cleaning when the cleaner head 100 moves forward and backward.

[0059] In some embodiments, the guide channel 112 can be arranged to taper in the direction close to the suction port 111, so as to facilitate the introduction of dust.

[0060] In some embodiments, the depth of the guide channel 112 can be arranged to gradually decrease in the direction close to the suction port 111, so as to facilitate the introduction of dust.

[0061] In some embodiments, the front side guide channel 112a and the rear side guide channel 112b can extend to the front side edge and the rear side edge of the housing 110, respectively, so as to improve the cleaning efficiency.

[0062] In some other embodiments, the housing 110 can be provided with the guide channels 112 only on the front side of the suction port 111 or on the rear side of the suction port 111.

[0063] In the illustrated embodiments, the front side guide channels 112a and the rear side guide channels 112b are both provided in multiple numbers to further improve the cleaning efficiency.

[0064] In particular, the suction port 111 can be provided with a seal 200 at the edge of the side provided with the guide channels 112, for improving the sealing of the cleaning head 100 and the surface to be cleaned in the direction away from the movement direction, reducing or even eliminating the influence of the guide channels 112 on the suction force, and thus improving the cleaning efficiency and cleaning effect of the vacuum cleaner.

[0065] In the embodiments in which the front side and the rear side of the suction port 111 are respectively provided with the guide channels 112, the front side edge and the rear side edge of the suction port 111 can be respectively provided with the front side seal 200a and the rear side seal 200b which are substantially the same in structure. When the cleaning head 100 is in a suspended state, the front side seal 200a and the rear side seal 200b are substantially mirror-symmetrical relative to the longitudinal central plane of the suction port 111.

[0066] Figure 3 is Figure 1 Fig. 2 is a schematic axonometric view of the seal 200. Referring to Fig. 2, the seal 200 can include at least one fixing portion 210, at least one channel sealing portion 220, and at least one bottom plate sealing portion 230. Figures 1 to 3

[0067] Specifically, the fixing portion 210 can be provided at the edge of the side of the suction port 111, for mounting the seal 200.

[0068] Each channel sealing portion 220 can be provided corresponding to one guide channel 112, for opening or blocking the corresponding guide channel 112.

[0069] The bottom plate sealing portion 230 can be used to contact the surface to be cleaned and drive the channel sealing portion 220 to deflect between the open position and the blocked position during the movement of the cleaning head 100.

[0070] The seal 200 of the utility model, through the contact and friction between the bottom plate sealing portion 230 and the surface to be cleaned during the movement of the cleaning head 100, drives the channel sealing portion 220 to deflect between the open position and the blocked position, not only the bottom plate sealing portion 230 keeps a certain degree of sealing with the surface to be cleaned, but also the channel sealing portion 220 can open the corresponding guide channel 112 when the suction port 111 moves towards the direction close to the seal 200, and block the corresponding guide channel 112 when the suction port 111 moves away from the seal 200, realizing the improvement of the sealing of the cleaning head 100 and the surface to be cleaned in the direction away from the movement direction.​

[0071] In some embodiments, the channel sealing portions 220 and the bottom plate sealing portions 230 can be arranged alternately in the width direction of the guide channels 112. That is, the projection of the channel sealing portions 220 in the length direction of the guide channels 112 is located within the guide channels 112, and the projection of the bottom plate sealing portions 230 in the length direction of the guide channels 112 is located between two adjacent guide channels 112 or between the guide channels 112 and the edge of the cleaning head 100, so as to avoid the bottom plate sealing portions 230 from blocking the guide channels 112 and to enable the dust to enter the suction port 111 completely from the guide channels 112, further improving the suction force of the cleaning head 100.

[0072] In embodiments in which the guide channels 112 are arranged on the front side and / or the rear side of the suction port 111, the length direction of the guide channels 112 is the front-rear direction of the cleaning head 100.

[0073] In other embodiments, the projection of the bottom plate sealing portions 230 in the length direction of the guide channels 112 can partially overlap the projection of the channel sealing portions 220 in the direction. That is, the projection of the bottom plate sealing portions 230 in the length direction of the guide channels 112 is also located within the guide channels 112, and can also achieve deflection of the channel sealing portions 220. For example, the plurality of bottom plate sealing portions 230 are uniformly spaced in the longitudinal direction of the channel sealing portions 220.

[0074] In some embodiments, the sealing member 200 can further include a connecting portion 240 connecting the fixed portion 210 and the channel sealing portions 220 and the bottom plate sealing portions 230, so as to facilitate installation of the sealing member 200 and to ensure the structural strength of the sealing member 200.

[0075] The connecting portion 240 can be divided into at least one first connecting segment 241 connected with the channel sealing portions 220 and at least one second connecting segment 242 connected with the bottom plate sealing portions 230 in the longitudinal direction of the connecting portion 240.

[0076] The size of the first connecting segment 241 in the extension direction of the connecting portion 240 relative to the fixed portion 210 can be smaller than the size of the second connecting segment 242 in the direction, so that the connecting portion 240 deforms under the force of the bottom plate sealing portions 230, and in turn drives the channel sealing portions 220 to deflect.

[0077] The bottom of the housing 110 can be formed with a mounting groove 113 with an opening facing the surface to be cleaned. The fixed portion 210 can be arranged in the mounting groove 113.

[0078] In embodiments in which the guide channels 112 are arranged on the front side and the rear side of the suction port 111, the front side periphery and the rear side periphery of the suction port 111 can be formed with a front side mounting groove 113a and a rear side mounting groove 113b, respectively.

[0079] In some embodiments, the fixing portion 210 can include a mounting strip 211 configured to cooperate with a mounting groove 113 of the cleaning head 100 to fix the seal 200 relative to the cleaning head 100.

[0080] A longitudinal middle portion of the mounting strip 211 can be configured to be connected to the connecting portion 240 to ensure the mounting of the seal 200 and improve the deformation reset ability of the connecting portion 240 relative to the mounting strip 211.

[0081] In some further embodiments, the fixing portion 210 can further include a positioning strip 212 disposed on a side of the mounting strip 211 away from the connecting portion 240.

[0082] A geometric center of the positioning strip 212 can be located on an extension line of a longitudinal central axis of the connecting portion 240 to make the fixing portion 210 cooperate more closely with the mounting groove 113, avoid the fixing portion 210 from being offset in the mounting groove 113, and further improve the structural strength and deformation ability of the seal 200.

[0083] The mounting groove 113 can include a receiving portion 1131 and a shape-fitting portion 1132. The receiving portion 1131 is configured to accommodate the mounting strip 211, and the shape-fitting portion 1132 is configured to be shaped-fitted with the positioning strip 212.

[0084] In some embodiments, the mounting groove 113 and its limiting structure can be configured to allow the fixing portion 210 to have a movement allowance in the height direction of the cleaning head 100 in the mounting groove 113. That is, the bottom plate sealing portion 230 exceeds the tangent plane of the traveling wheels of the cleaning head 100 when the cleaning head 100 is in a suspended state, so that the cleaning head 100 is in contact with the surface to be cleaned with appropriate pressure when placed on the surface to be cleaned, and the deformation of each part of the seal 200 is facilitated.

[0085] In some further embodiments, the positioning strip 212 can have a semicircular cross-section to facilitate the positioning strip 212 to slide into the shape-fitting portion 1132 of the mounting groove 113 when the cleaning head 100 is placed on the surface to be cleaned.

[0086] In some embodiments, a plurality of limiting protrusions 114 can be disposed on both sides of the opening of the mounting groove 113 in the transverse direction to limit the displacement of the seal 200 in the transverse direction while limiting the displacement of the seal 200 in the height direction of the cleaning head 100.

[0087] In some further embodiments, the plurality of limiting protrusions 114 can be disposed at positions corresponding to the bottom plate sealing portion 230 of the mounting groove 113 to avoid the limiting protrusions 114 interfering with the deflection of the channel sealing portion 220.

[0088] In some embodiments, the bottom plate seal part 230 can include a first support rib 231 and a second support rib 232 to facilitate the production and processing of the seal 200 and to smoothly switch the support rib in contact with the surface to be cleaned when the motion state of the cleaning head 100 changes.

[0089] The first support rib 231 can be arranged to be in contact with the surface to be cleaned and to place the passage seal part 220 in the open position when the motion direction of the cleaning head 100 is the same as the direction of the seal 200 relative to the dust inlet 111.

[0090] The second support rib 232 can be arranged to be in contact with the surface to be cleaned and to place the passage seal part 220 in the blocked position when the motion direction of the cleaning head 100 is opposite to the direction of the seal 200 relative to the dust inlet 111.

[0091] Figure 4 is Figure 1 is a schematic cross-sectional view of the cleaning head 100 when moving forward. Referring to Figure 4 When the cleaning head 100 moves forward, the first support rib 231 of the front seal part 200a is in contact with the surface to be cleaned, and the passage seal part 220 is in the open position to open the front guide passage 112a; the second support rib 232 of the rear seal part 200b is in contact with the surface to be cleaned, and the passage seal part 220 is in the blocked position to block the rear guide passage 112b.

[0092] Figure 5 is Figure 1 is a schematic cross-sectional view of the cleaning head 100 when moving backward. Referring to Figure 5 When the cleaning head 100 moves backward, the second support rib 232 of the front seal part 200a is in contact with the surface to be cleaned, and the passage seal part 220 is in the blocked position to block the front guide passage 112a; the first support rib 231 of the rear seal part 200b is in contact with the surface to be cleaned, and the passage seal part 220 is in the open position to open the rear guide passage 112b.

[0093] In some further embodiments, the projections of the first support rib 231 and the passage seal part 220 in the length direction of the guide passage 112 can be arranged on the two sides of the second support rib 232, respectively, which is beneficial to the deformation and resetting of the seal 200 and the deflection of each seal part.

[0094] The passage seal part 220 can be arranged to extend in an arc shape away from the second support rib 232, so that the passage seal part 220 can cooperate with the opening periphery of the mounting groove 113 of the cleaning head 100 to achieve the maximum opening of the guide passage 112.

[0095] The angle a between the channel sealing portion 220 and the projection of the second support rib 232 in the longitudinal direction of the seal 200 can be 30°-60°, for example, 30°, 40°, 50°, 55°, 60°, to ensure that the bottom plate sealing portion 230 effectively drives the channel sealing portion 220 to deflect.

[0096] The angle β between the first support rib 231 and the projection of the second support rib 232 in the longitudinal direction of the seal 200 can be less than the angle a between the channel sealing portion 220 and the projection of the second support rib 232 in the longitudinal direction of the seal 200, to reduce the deformation of the first support rib 231 relative to the second support rib 232.

[0097] The above-mentioned angle is the angle of the first support rib 231, the second support rib 232, and the channel sealing portion 220 relative to the central axis of the extension direction of the connecting portion 240.

[0098] The bottom end of the first support rib 231 can form a concave-convex surface, to facilitate the deflection of the first support rib 231 under the frictional action of the surface to be cleaned.

[0099] In some further embodiments, the second support rib 232 can be arranged to extend as a fold line relative to the connecting portion 240. The channel sealing portion 220 can be arranged to be coplanar with a segment of the second support rib 232, to move together with the second support rib 232.

[0100] In some further embodiments, the bottom plate sealing portion 230 can be in the shape of a sector, and the bottom curved surface thereof can roll relative to the surface to be cleaned when the cleaning head 100 changes the motion state, to drive the channel sealing portion 220 to deflect.

[0101] At this point, those skilled in the art should recognize that, although the present application has been fully illustrated and described herein with reference to a plurality of exemplary embodiments, many other variants or modifications in accordance with the principles of the present application can be directly determined or deduced from the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all such other variants or modifications.

Claims

1. A seal for improving the seal between a cleaning head of a vacuum cleaner and a surface to be cleaned in a direction away from the direction of movement of the cleaning head, the bottom of the cleaning head being provided with at least one guide channel which communicates with the suction port of the cleaning head, characterised in that, The seal comprises: at least one fixed part arranged at an edge of one side of the suction port; at least one channel sealing part arranged corresponding to one of the guide channels respectively, for opening or blocking the corresponding guide channel; and at least one bottom plate sealing part for contacting the surface to be cleaned and deflecting the channel sealing part between the opening position and the blocking position during the movement of the cleaning head.

2. The seal according to claim 1, wherein: the channel sealing part and the bottom plate sealing part are arranged alternately in the width direction of the guide channel.

3. The seal of claim 1, wherein, Further comprising: a connecting part arranged to connect the at least one fixed part, comprising a first connecting section connected to the at least one channel sealing part respectively, and a second connecting section connected to the at least one bottom plate sealing part respectively; wherein, the size of the first connecting section in the extension direction of the connecting part relative to the fixed part is smaller than the size of the second connecting section in the direction.

4. The seal of claim 1, wherein The bottom plate sealing part comprises: a first support rib arranged to contact the surface to be cleaned when the movement direction of the cleaning head is the same as the direction of the seal relative to the suction port, and to place the channel sealing part in the opening position; and a second support rib arranged to contact the surface to be cleaned when the movement direction of the cleaning head is opposite to the direction of the seal relative to the suction port, and to place the channel sealing part in the blocking position.

5. The seal according to claim 4, wherein: the projection of the first support rib and the channel sealing part in the length direction of the guide channel is arranged on both sides of the second support rib respectively; and the channel sealing part is arranged to extend in an arc shape away from the second support rib.

6. The seal according to claim 5, wherein: the included angle between the projection of the channel sealing part and the second support rib in the longitudinal direction of the seal is 30°-60°; and / or the included angle between the projection of the first support rib and the second support rib in the longitudinal direction of the seal is smaller than the included angle between the projection of the channel sealing part and the second support rib in the direction.

7. The seal of claim 1, wherein Further comprising: a connecting part arranged to connect the fixed part and at least one of the channel sealing part and the bottom plate sealing part; wherein the fixed part comprises: a mounting strip, the longitudinal middle part of which is arranged to be connected to the connecting part, for cooperating with the mounting groove of the cleaning head to realize the fixation of the seal relative to the cleaning head.

8. The seal of claim 7, wherein, The fixed part further comprises: a positioning strip arranged on the side of the mounting strip away from the connecting part, and the cross section of which is semicircular; wherein, the geometric center of the positioning strip is located on the extension line of the longitudinal central axis of the connecting part.

9. A cleaning head for a vacuum cleaner, characterised in that Comprising: a housing, the bottom of which is formed with a suction port, and at least one guide channel located on at least one side of the suction port in the front-rear direction, the guide channel being arranged to communicate with the suction port; and at least one seal according to any one of claims 1-8, arranged at an edge of one side of the suction port in the front-rear direction respectively.

10. The cleaning head according to claim 9, wherein, The bottom of the shell is formed with a mounting slot with an opening facing the surface to be cleaned, and the fixing part is arranged in the mounting slot; and A plurality of limiting protrusions are arranged at the opening of the mounting slot on the two lateral sides in the transverse direction, for limiting the movement of the fixing part in the height direction of the cleaning head; and The plurality of limiting protrusions are arranged at positions corresponding to the bottom plate sealing part of the mounting slot.

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