A wiper arm, a wiper and a transport vehicle

Abstract

The utility model discloses a rain -wiper arm, wiper and transport vehicle, rain -wiper arm includes arm seat, arm lever and elastic part, and one end of arm seat is rotatively connected with one end of arm lever, and elastic part sets up in the rotatory junction of arm seat and arm lever, and the elasticity of elastic part is used to drive arm lever to tend to rotate to be close to the front windshield to reset, and one end of arm seat and arm lever rotatively connected is provided with buckle male part, and one end of arm lever and arm seat connection is provided with buckle female part, when arm lever rotates to be warped under the action of external force, buckle male part and buckle female part can mutually buckle and connect to restrict arm lever in the warped state, or arm lever rotates to buckle male part and buckle female part to remove buckling and connection under the action of external force and rotates to reset under the action of the elasticity of elastic part. So make arm lever rotate to be warped relative to arm seat, if buckle male part and buckle female part buckle and connect, equivalent to lock arm lever in the warped state to avoid arm lever from being self -retracted under the action of elastic part when slight vibration or mistaken touch.

Description

Technical Field

[0001] This utility model belongs to the field of windshield wipers, and particularly relates to a windshield wiper arm, a windshield wiper, and a transport vehicle. Background Technology

[0002] Currently, the windshield wiper 100 includes components such as a wiper arm 10, a wiper blade 20, and a wiper motor 30 (e.g., Figures 1-3 As shown in the figure, the wiper arm 10 includes an arm base 1, an arm 2, and an elastic element 3, etc. One end of the arm base 1 is connected to the drive end of the wiper motor 30, one end of the arm 2 is rotatably connected to the other end of the arm base 1, the wiper blade 20 is detachably installed on the other end of the arm 2, and the elastic element 3 is disposed at the rotatable connection between the arm 2 and the arm base 1. The elastic force of the elastic element 3 drives the arm 2 to rotate so that the wiper blade 20 is pressed against the windshield 200. As for the arm 2, under the action of external force, it can rotate to the tilted state. When the arm 2 is in the tilted state with the maximum stroke, it can be kept in the tilted state to facilitate the replacement or repair of the wiper blade 20. However, at this time, one hand needs to be freed to hold the arm 2 to prevent it from retracting on its own under the elastic force of the elastic element 3 (the arm 2 may retract to the reset state on its own under the elastic force of the elastic element 3 under slight vibration or accidental impact, and a slight carelessness may cause the wiper blade 20 to smash the windshield 200). Replacing the wiper blade 20 with one hand is not flexible and has low efficiency. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a wiper arm with a simple structure, which can be limited to the tilted state when the arm is tilted during rotation.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A wiper arm includes an arm base, an arm rod, and an elastic element. One end of the arm base is rotatably connected to one end of the arm rod. The elastic element is disposed at the rotatable connection between the arm base and the arm rod. The elastic force of the elastic element drives the arm rod to rotate closer to the windshield to return to its original position. A male latch is provided at the end of the arm base rotatably connected to the arm rod, and a female latch is provided at the end of the arm rod connected to the arm base. When the arm rod rotates to a tilted position under external force, the male latch and the female latch can engage with each other to restrict the arm rod to the tilted state. Alternatively, the arm rod can rotate back to the original position under external force until the male latch and the female latch are disengaged, and then rotate back to its original position under the elastic force of the elastic element.

[0005] The beneficial effects of the above technical solution are as follows: when the arm rotates relative to the arm seat to the tilted position, if the male and female latches engage, it is equivalent to locking the arm in the tilted position. At this time, the wiper blade can be maintained or replaced with more confidence. Under the action of external force, the male and female latches can also be easily disengaged, and the arm can be slowly retracted to the reset position by manually supporting it.

[0006] In the above technical solution, both sides of the arm and the arm seat are extended to protrude and form a "U"-shaped hinge seat. One end of the arm seat extends into the hinge seat, and the arm seat and the arm are rotatably connected by a horizontally arranged rotating shaft.

[0007] The advantages of the above technical solution are that it makes the wiper arm lightweight, and the rotating connection between the arm and the arm seat is more aesthetically pleasing, while also having good strength.

[0008] The elastic element in the above technical solution includes a hook and a tension spring. A second hooking part is provided on the side of the arm near the windshield, and a first hooking part is provided on the arm seat near the hinge seat. The first hooking part is located on the side of the arm seat near the windshield. The hook is C-shaped, one end of the hook is hooked to the first hooking part, one end of the tension spring is hooked to the second hooking part, and the other end of the tension spring is hooked to the other end of the hook.

[0009] The beneficial effects of the above technical solution are: it makes the installation of the entire elastic element more convenient, and at the same time, it can continuously apply elastic force to the arm so that the arm always tends to retract.

[0010] The male part of the above technical solution includes a recessed and arc-shaped groove on one side of the arm seat. An elastic protrusion is embedded on at least one side of the groove wall. The female part of the buckle is a protruding post on the inner wall of the corresponding side of the hinge seat. The female part of the buckle extends into the groove on the corresponding side. When the arm is rotated to the tilted position, the female part of the buckle slides in the groove and is pressed past the elastic protrusion. The elastic protrusion is used to overcome the elastic force of the elastic element to prevent the arm from retracting, so as to restrict the arm to the tilted position.

[0011] The beneficial effect of the above technical solution is that when the boom rotates relative to the boom seat to the tilted position, the buckle nut slides in the groove accordingly. However, after the buckle nut passes the elastic protrusion, the elastic protrusion will prevent the boom from rotating back, which is equivalent to locking the boom to keep it in the tilted position. When it is necessary to unlock the boom, an external force pushes the boom to rotate back to pass the elastic protrusion, thus releasing the locking of the boom.

[0012] In the above technical solution, a plurality of elastic protrusions are provided at intervals along the length of the slide groove, each elastic protrusion corresponding to a tilting position, and the arm can be rotated to tilt and restricted to any one of the tilting positions.

[0013] The beneficial effect of the above technical solution is that each elastic protrusion constitutes a tilting position, that is, the boom has multiple tilting positions to facilitate maintenance.

[0014] In the above technical solution, the elastic protrusion is an "n"-shaped spring piece, and at least one end of the elastic protrusion is connected to the groove wall of the slide.

[0015] The advantages of the above technical solution are: its structure is simple and the elastic protrusion can deform when squeezed so that the latching part can pass through the sliding groove to lock or unlock.

[0016] The buckle male part in the above technical solution also includes an avoidance notch provided at one end of the slide groove, and the slide groove communicates with the avoidance notch. When the arm retracts to the reset position, the buckle female part slides along the slide groove into the avoidance notch.

[0017] The beneficial effect of the above technical solution is that it allows the boom and boom base to be easily disassembled and assembled for maintenance.

[0018] In the above technical solution, the male part of the buckle is an elastic positioning bead embedded in the side wall of the corresponding end of the arm seat, and the female part of the buckle is a groove recessed on the inner wall of the corresponding side of the hinge seat.

[0019] The beneficial effect of the above technical solution is that when the boom is rotated to the tilted position, the elastic end of the male part of the latch extends into the female part of the latch, and the boom is locked in the tilted position.

[0020] The second objective of this utility model is to provide a windshield wiper with a simple structure and a lever that can be positioned in a tilted state when rotated to the tilted position.

[0021] To achieve the above objectives, another technical solution of this utility model is as follows: a windshield wiper, comprising the wiper arm as described above.

[0022] The beneficial effect of the above technical solution is that when the wiper arm is in the tilted position, the male and female parts of the latch can cooperate to lock the arm in the tilted position, so there is no need to worry about the arm retracting on its own due to slight vibration or accidental contact.

[0023] The third objective of this utility model is to provide a transport vehicle with a simple structure and convenient wiper maintenance.

[0024] To achieve the above objectives, another technical solution of this utility model is as follows: a transport vehicle, including the windshield wipers as described above.

[0025] The beneficial effect of the above technical solution is that it makes it easy to maintain the windshield wipers of the transport vehicle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating various different states of a windshield wiper relative to the windshield in the prior art; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 An exploded view of a wiper arm in the prior art; Figure 4 This is an elevation view of the arm base and arm rod in Embodiment 1 of this utility model when they are separated at one end close to each other; Figure 5 This is a cross-sectional view of the boom in Embodiment 1 of this utility model when it is rotated relative to the boom seat to tilt up and lock. Figure 6 This is an elevation view of the arm base and arm rod in Embodiment 2 of this utility model when they are separated at one end close to each other; Figure 7 This is a cross-sectional view of the boom relative to the boom seat in Embodiment 2 of this utility model when it is rotated to the point of tilting up and locking. Figure 8 This is a partial cross-sectional view of the boom and boom seat in the locked state as described in Embodiment 3 of this utility model; Figure 9 This is a partial cross-sectional view of the boom and boom seat in the locked state as described in Embodiment 4 of this utility model.

[0027] In the diagram: 1. Arm seat; 11. First mounting part; 12. First shaft hole; 13. First groove; 2. Arm rod; 21. Hinge seat; 22. Second mounting part; 23. Second shaft hole; 24. Second groove; 3. Elastic element; 31. Hook; 32. Tension spring; 4. Buckle male part; 41. Slide groove; 42. Elastic protrusion; 43. Avoidance notch; 431. Opening; 5. Buckle female part; 6. Rotating shaft; 10. Wiper arm; 20. Wiper blade; 30. Wiper motor; 100. Wiper blade; 200. Windshield. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] It is understood that spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0031] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0032] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0033] Example 1 like Figures 1-5As shown, this embodiment provides a wiper arm, including an arm base 1, an arm 2, and an elastic element 3. One end of the arm base 1 is rotatably connected to one end of the arm 2. The elastic element 3 is disposed at the rotatable connection between the arm base 1 and the arm 2. The elastic force of the elastic element 3 is used to drive the arm 2 to rotate closer to the windshield 200 to return to its original position. A male latching part 4 is provided at the end of the arm base 1 rotatably connected to the arm 2, and a female latching part 5 is provided at the end of the arm 2 connected to the arm base 1. When the arm 2 rotates to a tilted position under the action of an external force, the male latching part 4 and the female latching part 5 can engage with each other to restrict the arm 2 to the tilted state, or the arm 2 rotates back under the action of an external force until the male latching part 4 and the female latching part 5 are unengaged, and then rotates back to its original position under the action of the elastic element 3. This allows the arm 2 to be locked in the raised state when it rotates relative to the arm seat 1, provided that the male latch 4 and the female latch 5 are engaged. At this point, the wiper blade can be maintained or replaced with relative peace of mind. Under external force, the male latch 4 and the female latch 5 can also be easily disengaged, and the arm 2 can be slowly retracted to its original position by manually guiding it.

[0034] in, Figure 1 The windshield wiper 100 is marked with three states. Figure 1 In the diagram, "B" corresponds to the state where the wiper blade 20 of the wiper 100 is pressed against the windshield 200, "D" corresponds to the state where the wiper arm 2 of the wiper 100 causes the wiper blade 20 to be raised to its maximum angle, and "C" corresponds to the state where the wiper arm 2 of the wiper 100 causes the wiper blade 20 to be raised halfway (i.e., the wiper blade 20 is between the maximum raised state and the state where it is pressed against the windshield 200).

[0035] like Figure 3 As shown in the figure, in this embodiment, both sides of the arm 2 and the arm seat 1 at the rotatable connection end extend to protrude and form a "U"-shaped hinge seat 21. One end of the arm seat 1 extends into the hinge seat 21, and the arm seat 1 and the arm 2 are rotatably connected by a horizontally arranged rotating shaft 6. This makes the rotatable connection between the arm 2 and the arm seat 1 more aesthetically pleasing and stronger. The structure of the arm 2 and the arm seat 1 in this embodiment, as well as the rotatable connection method between them via the rotating shaft 6, are existing technologies and will not be described in detail here.

[0036] Specifically, such as Figure 3As shown, in this embodiment, the arm seat 1 is rotatably connected to the arm 2, and a first shaft hole 12 is provided in the transverse direction at one end. The side walls on both sides of the hinge seat 21 are provided with second shaft holes 23 aligned with each other in the transverse direction. The corresponding end of the arm seat 1 extends into the groove of the hinge seat 21. At this time, the first shaft hole 12 and the two second shaft holes 23 are aligned with each other so that the rotating shaft 6 can pass through. At this time, the arm 2 and the arm seat 1 are rotatably connected (preferably, both ends of the rotating shaft 6 are riveted to expand to prevent it from loosening from the rotatable connection between the arm 2 and the arm seat 1).

[0037] like Figure 2 and 3 As shown, in this embodiment, the elastic element 3 includes a hook 31 and a tension spring 32. A second hooking part 22 is provided on the side of the arm 2 near the windshield 200. A first hooking part 11 is provided on the arm seat 1 near the hinge seat 21, and the first hooking part 11 is located on the side of the arm seat 1 near the windshield 200. The hook 31 is C-shaped, with one end hooked to the first hooking part 11, one end of the tension spring 32 hooked to the second hooking part 22, and the other end of the tension spring 32 hooked to the other end of the hook 31. This makes the installation of the entire elastic element 3 more convenient, and at the same time, it can continuously apply elastic force to the arm 2 so that the arm 2 always tends to retract. The structure of the elastic element 3 and its installation method at the rotatable connection between the arm seat 1 and the arm 2 in this embodiment are existing technologies and will not be described in detail here.

[0038] Specifically, such as Figure 3 As shown, the arm seat 1 has a first groove 13 recessed at one end near the arm 2, which is distributed along its length direction. The arm 2 has a second groove 24 recessed at one end near the arm seat 1, which is distributed along its length direction. The openings of the first groove 13 and the second groove 24 both face the windshield 200, which makes the entire wiper arm 10 lighter and more aesthetically pleasing.

[0039] In this embodiment, the second hooking part 22 can be a hook ring or pin located in the second groove 24, and the first hooking part 11 can be a hook ring or pin located in the first groove 13. Furthermore, the first hooking part 11 is close to the rotating shaft 6, and the second hooking part 22 is far away from the rotating shaft 6, which makes it easier to install the hook 31 and the tension spring 32.

[0040] In this embodiment, the first groove 13 penetrates the end of the arm seat 1 near the arm 2, and similarly, the second groove 24 penetrates the end of the arm 2 near the arm seat 1. This allows the elastic element 3 to be accommodated in the first groove 13 and the second groove 24, thereby improving the overall aesthetics of the wiper arm 10.

[0041] The core improvement of this embodiment is that, based on the existing wiper arm, a male latching part 4 is added to the arm base 1, and a female latching part 5 is added to the arm stalk 2. This allows the arm stalk 2 to be locked in the tilted state when rotated relative to the arm base 1 and the male latching part 4 and the female latching part 5 are engaged. The specific structures of the male latching part 4 and the female latching part 5 are as follows: like Figure 4 and Figure 5 As shown, in this embodiment, the male part of the buckle 4 includes a recessed and arc-shaped groove 41 on one side of the arm seat 1. An elastic protrusion 42 is embedded on at least one side of the groove wall of the groove 41. The female part of the buckle 5 is a protruding post on the inner wall of the corresponding side of the hinge seat 21. The female part of the buckle 5 extends into the groove 41 on the corresponding side. When the arm 2 rotates to the tilted position, the female part of the buckle 5 slides in the groove 41 and is pressed through the elastic protrusion 42. The elastic protrusion 42 is used to overcome the elastic force of the elastic member 3 to prevent the arm 2 from retracting, so as to restrict the arm 2 to the tilted position. When the arm 2 rotates relative to the arm seat 1 to the tilted position, the latch nut 5 slides in the slide groove 41. However, after the latch nut 5 passes the elastic protrusion 42, the elastic protrusion 42 will prevent the arm 2 from rotating back, which is equivalent to locking the arm 2 to keep it in the tilted position. When it is necessary to unlock the arm 2, an external force pushes the arm 2 to rotate back to pass the elastic protrusion 42, thus releasing the lock of the arm 2.

[0042] In this embodiment, the slide groove 41 is located at the edge of the corresponding end of the arm seat 1, and the slide groove 41 and the rotating shaft 6 are coaxially distributed.

[0043] See details Figure 5 As shown, in this embodiment, the elastic protrusion 42 is an "n"-shaped spring sheet, and at least one end of the elastic protrusion 42 is connected to the groove wall of the slide groove 41. Its structure is simple, and it allows the elastic protrusion 42 to deform when compressed so that the latching nut 5 can pass through the slide groove 41 to lock or unlock.

[0044] like Figure 4 As shown, in this embodiment, the male part 4 of the buckle also includes a clearance notch 43 provided at one end of the slide groove 41, and the slide groove 41 communicates with the clearance notch 43. When the arm 2 retracts to the reset position, the female part 5 of the buckle slides along the slide groove 41 into the clearance notch 43. This allows the arm 2 and the arm base 1 to be easily disassembled and assembled for maintenance.

[0045] like Figure 5As shown, in this embodiment, the elastic protrusion 42 is located in the slide groove 41 near its end (the end of the slide groove 41 away from the avoidance notch 43 is its end), so that when the arm 2 is rotated to the tilted state, it can be locked at its maximum tilted angle.

[0046] like Figure 1 As shown, when the arm 2 is raised to its maximum angle, the angle between the arm 2 and the arm base 1 is approximately 90°. When the arm 2 is retracted to its reset state, the angle between the arm 2 and the arm base 1 is approximately 180° (e.g., ...). Figure 1 (This is what the windshield wiper 100 looks like when it's in "D" mode).

[0047] like Figure 4 As shown, in this embodiment, the clearance notch 43 forms an opening 431 near the edge of the corresponding side. When the arm 2 and the arm seat 1 are assembled, the buckle nut 5 enters into the clearance notch 43 through the opening 431 and enters and exits the slide groove 41 through the clearance notch 43.

[0048] Example 2 like Figure 6 and Figure 7 As shown, in this embodiment, the slide groove 41 is provided with a plurality of elastic protrusions 42 spaced apart along its length. Each elastic protrusion 42 corresponds to a tilting position, and the arm 2 can be rotated to tilt and restricted to any one of the tilting positions. In this way, each elastic protrusion 42 constitutes a tilting position, that is, the arm 2 has multiple tilting positions to facilitate maintenance.

[0049] Preferably, two elastic protrusions 42 are spaced apart within the slide groove 41. One elastic protrusion 42 is located at the middle of the slide groove 41, while the other elastic protrusion 42 is located near its end within the slide groove 41. This allows the arm 2 to rotate and lock at its maximum tilted angle, or to rotate and lock at the halfway point of its tilt. At this point, the angle between the arm 2 and the arm base 1 is approximately 135° (e.g., ...). Figure 1 (This is what the windshield wiper 100 looks like when it's in the "C" position).

[0050] Example 3 Same as Example 1, except that, as Figure 8As shown, the male latch 4 is an elastic positioning bead embedded in the side wall of the corresponding end of the arm seat 1, and the female latch 5 is a groove recessed on the inner wall of the corresponding side of the hinge seat 21 (wherein, when the arm 2 rotates, the male latch 4 is located at the trajectory traced by the female latch 5, and when the arm 2 rotates to the tilted position, when the arm 2 rotates to the point where the male latch 4 and the female latch 5 are aligned, the elastic end of the male latch 4 will extend into the female latch 5 to lock the arm 2 at the corresponding angle). This ensures that when the arm 2 rotates to the tilted position, when the elastic end of the male latch 4 extends into the female latch 5, the arm 2 is locked in the tilted state.

[0051] Example 4 The difference is the same as in Embodiment 1, Embodiment 2, or Embodiment 3, except that, as Figure 9 As shown, there are two male latches 4 and two female latches 5. The two male latches 4 are symmetrically arranged on both sides of the corresponding end of the arm seat 1, and the two female latches 5 are symmetrically arranged on the inner walls of both sides of the hinge seat 21. This makes the arm 2 and the arm seat 1 more stable when rotated to tilt and lock.

[0052] Example 5 This embodiment provides a windshield wiper, including a wiper arm as described in Embodiments 1, 2, 3, or 4. When the wiper arm 2 is in the tilted-up state, it can be locked in this state by the engagement of the male latch 4 and the female latch 5, eliminating concerns about the arm 2 retracting due to slight vibration or accidental contact. Other aspects of the wiper 100 described in this embodiment that are not described in detail are considered prior art.

[0053] Example 6 This embodiment provides a transport vehicle including a windshield wiper 100 as described in Embodiment 5. This allows for convenient maintenance of the windshield wiper 100 of the transport vehicle.

[0054] The transport vehicle described in this embodiment can be a vehicle, a ship, or an aircraft. The installation method of the windshield wiper 100 on the transport vehicle is existing technology and will not be described in detail here.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wiper arm, comprising an arm base (1), an arm rod (2), and an elastic element (3), wherein one end of the arm base (1) is rotatably connected to one end of the arm rod (2), and the elastic element (3) is disposed at the rotatable connection between the arm base (1) and the arm rod (2), and the elastic force of the elastic element (3) is used to drive the arm rod (2) to rotate towards the windshield (200) to return to its original position, characterized in that, The arm seat (1) is rotatably connected to the arm (2) with a male buckle (4) and the arm (2) is connected to the arm seat (1) with a female buckle (5). When the arm (2) rotates to the tilted position under the action of external force, the male buckle (4) and the female buckle (5) can be fastened to each other to restrict the arm (2) to the tilted position, or the arm (2) rotates back to the position under the action of external force until the male buckle (4) and the female buckle (5) are unfastened, and rotates back to the reset position under the action of the elastic force of the elastic member (3).

2. The wiper arm according to claim 1, characterized in that, The arm (2) and the arm seat (1) are rotatably connected at one end, and both sides extend to protrude and form a "U"-shaped hinge seat (21). One end of the arm seat (1) extends into the hinge seat (21) and is rotatably connected to the arm seat (1) and the arm (2) by a horizontally arranged rotating shaft (6).

3. The wiper arm according to claim 2, characterized in that, The elastic element (3) includes a hook (31) and a tension spring (32). The arm (2) is provided with a second hook (22) on the side near the windshield (200). The arm seat (1) is provided with a first hook (11) near the hinge seat (21). The first hook (11) is located on the side of the arm seat (1) near the windshield (200). The hook (31) is "C" shaped. One end of the hook (31) is hooked to the first hook (11). One end of the tension spring (32) is hooked to the second hook (22). The other end of the tension spring (32) is hooked to the other end of the hook (31).

4. The wiper arm according to claim 2 or 3, characterized in that, The male part of the buckle (4) includes a recessed and arc-shaped groove (41) on one side of the arm seat (1). An elastic protrusion (42) is embedded on at least one side of the groove wall of the groove (41). The female part of the buckle (5) is a protruding post on the inner wall of the corresponding side of the hinge seat (21). The female part of the buckle (5) extends into the groove (41) on the corresponding side. When the arm (2) rotates to the tilted position, the female part of the buckle (5) slides and presses in the groove (41) until it passes the elastic protrusion (42). The elastic protrusion (42) is used to overcome the elastic force of the elastic element (3) to prevent the arm (2) from retracting, so as to restrict the arm (2) to the tilted position.

5. The wiper arm according to claim 4, characterized in that, The groove (41) is provided with a plurality of elastic protrusions (42) spaced apart along its length. Each elastic protrusion (42) corresponds to a tilting position. The arm (2) can be rotated to tilt and restricted to any one of the tilting positions.

6. The wiper arm according to claim 4, characterized in that, The elastic protrusion (42) is an "n"-shaped spring piece, and at least one end of the elastic protrusion (42) is connected to the groove wall of the slide (41).

7. The wiper arm according to claim 4, characterized in that, The male part of the buckle (4) also includes a clearance notch (43) provided at one end of the slide groove (41), and the slide groove (41) communicates with the clearance notch (43). When the arm (2) retracts to the reset position, the female part of the buckle (5) slides along the slide groove (41) into the clearance notch (43).

8. The wiper arm according to claim 2 or 3, characterized in that, The male part of the buckle (4) is an elastic positioning bead embedded in the corresponding end side wall of the arm seat (1), and the female part of the buckle (5) is a groove recessed on the corresponding side inner wall of the hinge seat (21).

9. A windshield wiper, characterized in that, Includes the wiper arm as described in any one of claims 1-8.

10. A transport vehicle, characterized in that, Includes the windshield wiper as described in claim 9.

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