Wiping head

Abstract

The utility model belongs to the technical field of cleaning tools, and particularly relates to a wiping head which comprises a main body support and an auxiliary support, the main body support and the auxiliary support are provided with a first hinge seat and a second hinge seat respectively, and the first hinge seat and the second hinge seat are rotationally connected. A first supporting arm and a second supporting arm are arranged on the first hinge seat and the second hinge seat respectively, the first supporting arm and the second supporting arm can be unfolded or folded relatively by controlling the main body support and the auxiliary support to rotate relatively, and a mounting clamping hook is arranged on the main body support and / or the auxiliary support; the first supporting arm and the second supporting arm are oppositely unfolded or folded to drive the wiping object on the wiping head to be unfolded or folded, the installation clamping hook can hook the wiping object and prevent the wiping object from being separated from the first supporting arm and the second supporting arm, and the wiping head is convenient for a user to use and convenient to store and store.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning tools, and particularly relates to a wiping head. Background Art

[0002] The wiping head is an important component of cleaning tools. Most wiping heads are detachably provided with wiping materials, and during the use of cleaning tools, cleaning is mostly carried out through the wiping materials on the wiping head.

[0003] After the wiping material is used for a long time, the cleaning effect will deteriorate. Therefore, some wiping materials on the wiping heads in the market are detachably replaceable. For example, a cleaning tool disclosed in Chinese Utility Model Patent CN202311520114.4 includes a handle, a cleaning fork and a locking structure. The cleaning fork is arranged on the handle and is used for cleaning the area to be cleaned; the cleaning fork can rotate relative to the handle to adjust the angle of the cleaning fork relative to the handle, so as to realize the folding or opening of the cleaning fork. The locking structure is arranged on the cleaning fork and is used to lock the cleaning fork relative to the handle. When cleaning the indoor area, the cleaning fork of the present invention rotates relative to the handle to adjust the cleaning fork to the required angle, so that the user can easily clean each area; after cleaning, the cleaning fork is folded relative to the handle, so that the space occupied by the cleaning tool is greatly reduced and it is convenient to store.

[0004] In the above structure, the cleaning fork (i.e., the wiping head) is flat, so that there are two relatively arranged cleaning surfaces and two relatively arranged cleaning edges on the cleaning tool. However, this cleaning tool has a weak ability to adsorb dust, and there are relatively few cleaning surfaces and cleaning edges, and the wiping material needs to be replaced frequently, resulting in a high use cost. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a wiping head that is convenient for users to use and convenient for storage and collection.

[0006] The purpose of the utility model is realized as follows:

[0007] A wiping head includes a main body bracket and an auxiliary bracket. A first hinge seat and a second hinge seat are respectively arranged on the main body bracket and the auxiliary bracket. The first hinge seat and the second hinge seat are rotationally connected, and a first support arm and a second support arm are respectively arranged on the first hinge seat and the second hinge seat. Controlling the relative rotation of the main body bracket and the auxiliary bracket can cause the first support arm and the second support arm to be relatively unfolded or folded. An installation hook is arranged on the main body bracket and / or the auxiliary bracket;

[0008] The relative unfolding or folding of the first support arm and the second support arm can drive the wiping material on the wiping head to be unfolded or folded, and the installation hook can hook the wiping material and prevent the wiping material from detaching from the first support arm and the second support arm.

[0009] The present utility model is further configured such that: the main body bracket includes a hinge member and a connection seat which are detachably connected. A first hinge seat and a limiting portion are provided on the hinge member. A hinge hole adapted to the first hinge seat is provided on the auxiliary bracket. A limiting convex edge is provided on the connection seat. The limiting wall and the limiting convex edge respectively extend to both sides of the auxiliary bracket to limit the extension and prevent the axial movement of the first hinge seat and the hinge hole.

[0010] The present utility model is further configured such that: the mounting hook is provided on the side surface of the connection seat. The mounting hook can abut against the auxiliary bracket to limit the axial movement of the first hinge seat and the hinge hole.

[0011] The present utility model is further configured such that: the first hinge seat is provided at one end of the first support arm. A hinge protrusion is provided at the other end of the first support arm. The hinge protrusion is coaxially arranged with the first hinge seat. The second hinge seat is provided at one end of the second support arm. A hinge groove adapted to the hinge protrusion is provided at the other end of the first support arm.

[0012] The present utility model is further configured such that: at least two first support arms are spaced apart on the first hinge seat. The first support arms are respectively connected to the hinge protrusion. At least two second support arms are spaced apart on the second hinge seat. The second support arms are respectively connected to the side walls of the hinge groove.

[0013] The present utility model is further configured such that: the second support arm is integrally C-shaped. The first support arm can be received in the second support arm. And the first support arm or the second support arm is made of an elastic material. The first support arm or the second support arm can be deformed to make the first hinge seat and the hinge protrusion respectively cooperate with the second hinge seat and the hinge groove.

[0014] The present utility model is further configured such that: a first limiting block for limiting the rotation angle between the main body bracket and the auxiliary bracket is provided on the auxiliary bracket. The main body bracket can abut against the first limiting block to relatively unfold or fold the first support arm and the second support arm.

[0015] The present utility model is further configured such that: a second limiting block is provided on the main body bracket. A limiting swing groove adapted to the second limiting block is provided on the auxiliary bracket. And a limiting protrusion is provided in the limiting swing groove. The limiting protrusion can limit the relative movement of the second limiting block in the limiting swing groove and keep the first support arm and the second support arm relatively unfolded or relatively folded. Under the action of an external force, the second limiting block can cross over the limiting protrusion, thereby controlling the relative unfolding or folding of the first support arm and the second support arm.

[0016] The present utility model is further configured as follows: The auxiliary support is provided with a hinge hole, the limiting swing groove is arranged on the side wall of the hinge hole, and a guiding groove is also arranged on the side wall of the hinge hole. The guiding groove extends to the end of the hinge hole, and the guiding groove is connected to the limiting swing groove and is arranged in an L shape or a T shape. The second limiting block is guided through the guiding groove and enters the limiting swing groove.

[0017] The present utility model is further configured as follows: A guiding surface is arranged at the connection position of the guiding groove and the limiting swing groove, and the second limiting block is guided through the guiding surface and enters the limiting swing groove.

[0018] The advantages of the present utility model compared with the prior art are as follows:

[0019] 1. In the present utility model, the first support arm and the second support arm can be relatively unfolded or folded to change the shape of the wiping head. The user can control different positions of the wiping material on the wiping head for cleaning, improving the cleaning effect and service life of the wiping material, facilitating the reduction of the use cost of the wiping head. Moreover, this structure can increase the width of the wiping head, thus facilitating the wiping material on the wiping head to adsorb the dust raised during the use process. During storage and transportation, the first support arm and the second support arm can be relatively folded, which is convenient for the storage and collection of the wiping head and helps to avoid accidental damage to the wiping head, prolonging the service life of the wiping head. The setting of the installation hook is beneficial to the stable installation of the wiping material and avoids the accidental dropping of the wiping material from the wiping head during use.

[0020] 2. In the present utility model, the main body support and the auxiliary support are connected by a detachable hinge and a connecting seat, with a simple structure and convenient assembly and production of the wiping head. Since the installation hook can abut against the auxiliary support, it not only facilitates the connection between the main body support and the auxiliary support but also can support the installation hook through the auxiliary support to avoid bending and damage of the installation hook.

[0021] 3. In the present utility model, both ends of the first support arm and the second support arm are respectively rotationally connected through the first hinge seat and the second hinge seat as well as the hinge protrusion and the hinge groove, which is beneficial to the stable connection between the first support arm and the second support arm and helps to improve the structural strength of the wiping head, avoiding excessive deformation of the first support arm and the second support arm during use and affecting the cleaning effect of the wiping material on the wiping head. At least two groups of first support arms and first support arms can not only increase the cleaning surface and cleaning edges of the wiping material on the wiping head but also help to improve the structural strength of the wiping head, reduce the deformation of the wiping head, and prolong the service life of the wiping head.

[0022] 4. In this utility model, the C-shaped second support arm facilitates the folding and storage of the first support arm as a whole. The first support arm or the second support arm made of elastic material facilitates the stable installation of the first support arm or the second support arm, preventing the accidental detachment of the first hinge seat and the second hinge seat, as well as the hinge protrusion and the hinge groove; the setting of the first limit block facilitates the first support arm and the second support arm to be quickly unfolded or folded into a specific shape, which is convenient for users to use.

[0023] 5. In this utility model, the setting of the second limit block and the limit swing groove facilitates restricting the relative rotation angle of the first support arm and the second support arm, facilitating the first support arm and the second support arm to be quickly unfolded or folded into a specific shape. The setting of the limit protrusion facilitates the first support arm and the second support arm to maintain the unfolded state or the folded state, which is convenient for users to use; the setting of the guide groove and the guide surface facilitates the quick installation of the second limit block and the limit swing groove, facilitating the assembly and production of the wiping head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the wiping head in the use state of this utility model;

[0025] Figure 2 is a schematic structural diagram of the wiping head in the folded state of this utility model;

[0026] Figure 3 is an exploded view of this utility model;

[0027] Figure 4 is a schematic structural diagram of the hinge member in this utility model;

[0028] Figure 5 is a schematic structural diagram of the connection seat in this utility model;

[0029] Figure 6 is a schematic structural diagram of the auxiliary support in this utility model.

[0030] The meanings of the reference numerals in the figures: 1 - main body bracket; 2 - hinge member; 21 - first support arm; 22 - first hinge seat; 23 - hinge protrusion; 211 - extension part; 221 - positioning slot; 222 - through slot; 3 - connection seat; 31 - insertion part; 32 - installation hook; 33 - second limit block; 34 - convex block; 4 - auxiliary support; 41 - second support arm; 42 - limit swing groove; 43 - guide groove; 44 - first limit block; 45 - hinge hole; 46 - hinge groove;

[0031] 47 - second hinge seat; 421 - limit protrusion; 422 - guide surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further describes this utility model in conjunction with the drawings and specific embodiments:

[0033] See Figures 1 to 6 As shown, a wiping head includes a main body bracket 1 and an auxiliary bracket 4. A first hinge seat 22 and a second hinge seat 47 are respectively arranged on the main body bracket 1 and the auxiliary bracket 4. The first hinge seat 22 and the second hinge seat 47 are rotationally connected, and a first support arm 21 and a second support arm 41 are respectively arranged on the first hinge seat 22 and the second hinge seat 47. Controlling the relative rotation of the main body bracket 1 and the auxiliary bracket 4 can cause the first support arm 21 and the second support arm 41 to be relatively unfolded or folded. The relative unfolding or folding of the first support arm 21 and the second support arm 41 can drive the wiping material on the wiping head to be unfolded or folded. The first support arm 21 and the second support arm 41 can be relatively unfolded or folded to change the shape of the wiping head. The user can control different positions of the wiping material on the wiping head for cleaning, improving the cleaning effect and service life of the wiping material, facilitating the reduction of the use cost of the wiping head, and this structure can increase the width of the wiping head, thereby facilitating the wiping material on the wiping head to adsorb the dust raised during the use process. During storage and transportation, the first support arm 21 and the second support arm 41 can be relatively folded, facilitating the storage and accommodation of the wiping head and helping to avoid accidental damage to the wiping head, and extending the service life of the wiping head.

[0034] In the present utility model, an installation hook 32 is arranged on the main body bracket 1 and / or the auxiliary bracket 4. The installation hook 32 can hook the wiping material and prevent the wiping material from detaching from the first support arm 21 and the second support arm 41. The arrangement of the installation hook 32 is beneficial to the stable installation of the wiping material, avoiding the accidental dropping of the wiping material from the wiping head during use and facilitating the use by the user.

[0035] A first limiting block 44 for limiting the rotation angle between the main body bracket 1 and the auxiliary bracket 4 is arranged on the auxiliary bracket 4. The main body bracket 1 can abut against the first limiting block 44 to relatively unfold or fold the first support arm 21 and the second support arm 41. The arrangement of the first limiting block 44 facilitates the first support arm 21 and the second support arm 41 to be quickly unfolded or folded into a specific shape, facilitating the use by the user.

[0036] A convex portion adapted to the first limiting block 44 can be arranged on the main body bracket 1. In the present utility model, the first limiting block 44 is arranged at the end of the second hinge seat 47. The first support arm 21 includes an extension portion 211 extending outward from the second hinge seat 47. The extension portion 211 can abut against the first limiting block 44, thereby limiting the rotation angle of the first support arm 21 and the second support arm 41.

[0037] In the present utility model, a second limiting block 33 is provided on the main body bracket 1, a limiting swing groove 42 adapted to the second limiting block 33 is provided on the auxiliary bracket 4, and a limiting protrusion 421 is provided in the limiting swing groove 42. The limiting protrusion 421 can limit the relative movement of the second limiting block 33 in the limiting swing groove 42 and keep the first support arm 21 and the second support arm 41 in a relatively unfolded or relatively folded state; under the action of an external force, the second limiting block 33 can cross over the limiting protrusion 421, thereby controlling the relative unfolding or folding of the first support arm 21 and the second support arm 41. The setting of the second limiting block 33 and the limiting swing groove 42 is convenient for limiting the relative rotation angle of the first support arm 21 and the second support arm 41, and facilitating the first support arm 21 and the second support arm 41 to be quickly unfolded or folded into a specific shape. The setting of the limiting protrusion 421 is convenient for the first support arm 21 and the second support arm 41 to maintain the unfolded state or the folded state.

[0038] Compared with restricting the rotation angle of the first support arm 21 and the second support arm 41 by the first limiting block 44, the second limiting block 33 can respectively abut against both ends of the limiting swing groove 42 to realize the unfolding and folding of the first support arm 21 and the second support arm 41, and the limiting swing groove 42 can also restrict the movement of the second limiting block 33 along the axial direction of the second hinge seat 47, which is beneficial to the stable connection between the main body bracket 1 and the auxiliary bracket 4.

[0039] The producer can adopt one of the first limiting block 44 or the second limiting block 33 to limit the rotation angle of the first support arm 21 and the second support arm 41. In this embodiment, a second limiting block 33 is provided on the first hinge seat 22, and a first limiting block 44 and a limiting swing groove 42 are provided on the second hinge seat 47. By using two sets of structures to limit the rotation angle of the first support arm 21 and the second support arm 41, it can prevent the first limiting block 44 or the second limiting block 33 from being damaged due to excessive force.

[0040] An articulated hole 45 is provided on the auxiliary bracket 4, the limiting swing groove 42 is provided on the side wall of the articulated hole 45, and a guiding groove 43 is further provided on the side wall of the articulated hole 45. The guiding groove 43 extends to the end of the articulated hole 45. The guiding groove 43 is connected to the limiting swing groove 42 and is arranged in an L shape or a T shape. The second limiting block 33 is guided through the guiding groove 43 and enters the limiting swing groove 42. The setting of the guiding groove 43 is convenient for the connection and cooperation between the second limiting block 33 and the limiting swing groove 42, and facilitates the assembly of the main body bracket 1 and the auxiliary bracket 4.

[0041] In order to reduce the up-and-down shaking of the second limiting block 33 in the limiting swinging groove 42, there is a small gap between the second limiting block 33 and the side wall of the limiting swinging groove 42 during assembly. Therefore, it is preferred that a guiding surface 422 is provided at the connecting position of the guiding groove 43 and the limiting swinging groove 42. The second limiting block 33 is guided into the limiting swinging groove 42 through the guiding surface 422. The setting of the guiding surface 422 facilitates the second limiting block 33 to quickly penetrate into the limiting swinging groove 42, which is convenient for the quick assembly of the main body bracket 1 and the auxiliary bracket 4.

[0042] In the present utility model, the main body bracket 1 includes a hinged part 2 and a connecting seat 3 which are detachably connected. A first hinge seat 22 and a limiting part are provided on the hinged part 2. An hinge hole 45 adapted to the first hinge seat 22 is provided on the auxiliary bracket 4. A limiting convex edge is provided on the connecting seat 3. The limiting wall and the limiting convex edge respectively extend to both sides of the auxiliary bracket 4 to limit the extension and avoid the axial movement of the first hinge seat 22 and the hinge hole 45. The detachably connected hinged part 2 and the connecting seat 3 connect the main body bracket 1 and the auxiliary bracket 4, with a simple structure and convenient for the assembly and production of the wiping head.

[0043] The installation hook 32 is arranged on the side of the connecting seat 3. The installation hook 32 can abut against the auxiliary bracket 4 to limit the axial movement of the first hinge seat 22 and the hinge hole 45. This structure not only facilitates the connection between the main body bracket 1 and the auxiliary bracket 4, but also can support the installation hook 32 through the auxiliary bracket 4 to avoid the bending and damage of the installation hook 32.

[0044] In this embodiment, the extension part 211 can abut against the end of the hinge hole 45 to prevent the hinged part 2 from passing through the hinge hole 45. The connecting seat 3 and the first hinge seat 22 are detachably connected by fasteners. A positioning slot 221 is provided on the first hinge seat 22, and a plug-in part 31 adapted to the positioning slot 221 is provided on the connecting seat 3. A through slot 222 is provided on the side of the positioning slot 221, and a convex block 34 adapted to the through slot 222 is provided on the side of the plug-in part 31. The installation hook 32 is arranged on the convex block 34, and the second limiting block 33 is the part of the installation hook 32 penetrating into the limiting swinging groove 42.

[0045] The first hinge seat 22 is arranged at one end of the first support arm 21. An articulation projection 23 is arranged at the other end of the first support arm 21. The articulation projection 23 is coaxially arranged with the first hinge seat 22. The second hinge seat 47 is arranged at one end of the second support arm 41. An articulation groove 46 adapted to the articulation projection 23 is arranged at the other end of the first support arm 21. In this structure, both ends of the first support arm 21 and the second support arm 41 are rotationally connected through the first hinge seat 22 and the second hinge seat 47, and the articulation projection 23 and the articulation groove 46 respectively, which is conducive to the stable connection of the first support arm 21 and the second support arm 41, and is conducive to improving the structural strength of the wiping head, and avoiding excessive deformation of the first support arm 21 and the second support arm 41 during use, which affects the cleaning effect of the wiping material on the wiping head.

[0046] In the present utility model, at least two first support arms 21 are arranged at intervals on the first hinge seat 22. The first support arms 21 are respectively connected to the articulation projections 23. At least two second support arms 41 are arranged at intervals on the second hinge seat 47. The second support arms 41 are respectively connected to the side walls of the articulation grooves 46. At least two groups of first support arms 21 and second support arms 41 can not only increase the cleaning surface and cleaning edges of the wiping material on the wiping head, but also be conducive to improving the structural strength of the wiping head, reducing the deformation of the wiping head, and prolonging the service life of the wiping head.

[0047] In this embodiment, two first support arms 21 are symmetrically arranged on both sides of the first hinge seat 22, and two second support arms 41 are symmetrically arranged on both sides of the second hinge seat 47; when the first support arm 21 and the second support arm 41 are unfolded relatively, the first support arm 21 and the second support arm 41 are arranged in a cross shape, and when the first support arm 21 and the second support arm 41 are folded relatively, the first support arm 21 and the second support arm 41 are close to each other and form a linear structure.

[0048] The second support arm 41 is integrally in a C shape, and the first support arm 21 can be received in the second support arm 41. The overall C-shaped second support arm 41 facilitates the folding and storage of the first support arm 21, and avoids damage due to concentrated stress at the contact position between the first support arm 21 and the second support arm 41 during folding.

[0049] Preferably, the first support arm 21 or the second support arm 41 is made of an elastic material. The first support arm 21 or the second support arm 41 can be deformed to enable the first hinge seat 22 and the articulation projection 23 to cooperate with the first hinge seat 22 and the articulation groove 46 respectively. The first support arm 21 or the second support arm 41 made of an elastic material is convenient for the stable installation of the first support arm 21 or the second support arm 41, and avoids accidental detachment of the first hinge seat 22 and the second hinge seat 47, and the articulation projection 23 and the articulation groove 46.

[0050] During the installation of the wiping head, first control the first support arm 21 or the second support arm 41 to deflect laterally, so that the first hinge seat 22 on the hinge member 2 penetrates into the hinge hole 45. Then control the deformation of the first support arm 21 or the second support arm 41 to make the hinge protrusion 23 approach the first hinge seat 22, so that the hinge protrusion 23 can penetrate into the hinge groove 46. Finally, control the relative fixation of the hinge member 2 and the connection seat 3 through fasteners.

[0051] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A wiping head, characterized in that: The invention comprises a main frame (1) and an auxiliary frame (4), wherein the main frame (1) and the auxiliary frame (4) are respectively provided with a first hinge seat (22) and a second hinge seat (47), the first hinge seat (22) and the second hinge seat (47) are rotatably connected, and the first hinge seat (22) and the second hinge seat (47) are respectively provided with a first support arm (21) and a second support arm (41), and the main frame (1) and the auxiliary frame (4) are controlled to rotate relative to each other so that the first support arm (21) and the second support arm (41) can be relatively unfolded or folded, and the main frame (1) and / or the auxiliary frame (4) are provided with a mounting hook (32); The first support arm (21) and the second support arm (41) can be relatively unfolded or folded to drive the wiping material on the wiping head to be unfolded or folded, and the mounting hook (32) can hook the wiping material and prevent the wiping material from being separated from the first support arm (21) and the second support arm (41).

2. A wiping head according to claim 1, characterized in that: The main support (1) comprises a detachably connected hinge (2) and a connecting seat (3); the hinge (2) is provided with a first hinge seat (22) and a limiting portion; the auxiliary support (4) is provided with a hinge hole (45) adapted to the first hinge seat (22); the connecting seat (3) is provided with a limiting convex edge; the limiting wall and the limiting convex edge respectively extend to both sides of the auxiliary support (4) and limit the extension to avoid axial movement of the first hinge seat (22) and the hinge hole (45).

3. A wiping head according to claim 2, characterized in that: The mounting hook (32) is arranged on the side of the connecting seat (3), and the mounting hook (32) can abut against the auxiliary bracket (4) and limit the axial movement of the first hinge seat (22) and the hinge hole (45).

4. A wiping head according to claim 1, characterized in that: The first hinge seat (22) is arranged at one end of the first support arm (21), and the other end of the first support arm (21) is provided with a hinge protrusion (23), and the hinge protrusion (23) is coaxially arranged with the first hinge seat (22); the second hinge seat (47) is arranged at one end of the second support arm (41), and the other end of the first support arm (21) is provided with a hinge groove (46) adapted to the hinge protrusion (23).

5. A wiping head according to claim 4, characterized in that: At least two first support arms (21) are arranged at intervals on the first hinge seat (22), and the first support arms (21) are respectively connected to the hinge protrusions (23); at least two second support arms (41) are arranged at intervals on the second hinge seat (47), and the second support arms (41) are respectively connected to the side walls of the hinge groove (46).

6. A wiping head according to claim 4, characterized in that: The second support arm (41) is C-shaped as a whole, the first support arm (21) can be received in the second support arm (41), and the first support arm (21) is made of elastic material. The first support arm (21) can be deformed and make the first hinge seat (22) and the hinge protrusion (23) cooperate with the second hinge seat (47) and the hinge groove (46) respectively.

7. A wiping head according to claim 1, characterized in that: The auxiliary support (4) is provided with a first limit block (44) for limiting the rotation angle of the main support (1) and the auxiliary support (4); the main support (1) can abut against the first limit block (44) to enable the first support arm (21) and the second support arm (41) to be relatively unfolded or folded.

8. A wiping head according to claim 1, characterized in that: The main support (1) is provided with a second limit block (33), the auxiliary support (4) is provided with a limit swing groove (42) adapted to the second limit block (33), and a limit protrusion (421) is provided in the limit swing groove (42), the limit protrusion (421) can limit the relative movement of the second limit block (33) in the limit swing groove (42) and keep the first support arm (21) and the second support arm (41) relatively unfolded or folded; under the action of external force, the second limit block (33) can go over the limit protrusion (421), thereby controlling the first support arm (21) and the second support arm (41) to be relatively unfolded or folded.

9. A wiping head according to claim 8, characterized in that: The auxiliary bracket (4) is provided with a hinge hole (45), the limiting swing groove (42) is provided on the side wall of the hinge hole (45), and the side wall of the hinge hole (45) is also provided with a guide groove (43), the guide groove (43) extends to the end of the hinge hole (45), the guide groove (43) is connected to the limiting swing groove (42) and is arranged in an L shape or a T shape, and the second limiting block (33) is guided by the guide groove (43) and enters the limiting swing groove (42).

10. A wiping head according to claim 9, characterized in that: A guide surface (422) is provided at the connection position between the guide groove (43) and the limit swing groove (42), and the second limit block (33) is guided into the limit swing groove (42) by the guide surface (422).

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