Crank arm linkage mechanism of front sunshade curtain

Abstract

The invention relates to a crank arm linkage mechanism of a front sunshade curtain, which is arranged between a curtain cloth rolling shaft group and curtain cloth of the front sunshade curtain, the crank arm linkage mechanism is assembled with the curtain cloth through a curtain cloth side rod and is assembled between the curtain cloth side rod and a shaft tube in a manner that two crank arm assemblies are oppositely arranged, and a lower arm rod of each crank arm assembly is pivoted on the back side of an upper arm rod. A deviation distance is formed between the back side of the lower arm rod and the back side of the upper arm rod, an avoiding space is formed in the upper section of the front side of the curtain cloth side rod, when the curtain cloth is folded, the two folded crank arm assemblies drive the curtain cloth side rod to the back side of the shaft pipe, the upper arm rod can be located between the shaft pipe and the curtain cloth side rod, and the lower arm rod extends into the curtain cloth side rod through the avoiding space. After the crank arm assembly is folded and combined, the height can be reduced, then the curtain cloth side rod is driven to ascend to be close to the back side of the shaft pipe, and the bottom edge position of the curtain cloth side rod is close to the bottom edge position of the shaft pipe.

Description

Technical Field

[0001] This invention relates to a windshield sunshade that provides sunshade function for the windshield of a motor vehicle, and more particularly to a curved arm linkage mechanism disposed between the curtain roll-up shaft assembly and the movable edge of the curtain in the windshield sunshade, which operates the opening and closing of the curtain. Background Technology

[0002] A windshield sunshade is a product installed on the windshield of a motor vehicle to provide sun protection. For example... Figures 9 to 12 As shown, the existing manual front sunshade consists of a curtain roll-up shaft assembly 70, a curtain 80 that can be rolled up and released by the curtain roll-up shaft assembly 70, and a crank arm mechanism connecting the curtain roll-up shaft assembly 70 and the curtain 80. The curtain roll-up shaft assembly 70 has an inner tube 72 with a torsional elastic component installed inside its shaft tube 71, and the inner tube 72 connects to one side of the curtain 80, allowing the curtain 80 to be automatically rolled up by the curtain roll-up shaft assembly 70 and pulled out and unfolded from the shaft tube 71. A curtain side rod 81 is provided on the movable side of the curtain 80 extending outside the shaft tube 71. The crank arm mechanism is symmetrically connected between the shaft tube 71 and the curtain side rod 81 with its two crank arm components 90. A handle 82 is provided in the middle section of the curtain side rod. By operating the curtain edge rod 81 connected to the curtain 80 to raise and lower, combined with the balanced folding action of the two curved arm assembly 90, and the curtain roll-up shaft assembly 70 to roll up and release the curtain 80, the curtain 80 can be smoothly unfolded and closed.

[0003] While existing windshield sunshades can provide sun protection when installed on the windshield of a vehicle, examining their overall structure and usage reveals several issues. Figures 9 to 12 As shown, in the existing front sunshade, after the curtain 80 is rolled up, because the upper end of the lower arm 92, which is pivotally connected to the bottom end of the upper arm 91, is located on the side of the bottom end of the upper arm 91 facing the shaft tube 71 (i.e., the lower arm 92 is in front and the upper arm 91 is behind), and the pivot block 93, which is pivotally connected to the bottom end of the lower arm 92, is pivotally connected to the straight rod-shaped curtain edge rod 81 with the groove facing upward, when the two curved arm assemblies 90 are folded up from bottom to top to the back side of the shaft tube 71 of the curtain roll-up shaft assembly 70, as... Figure 11 and Figure 12As shown, the lower arm 92, which is pivotally connected to the pivot block 93, has its curtain edge rod 81 restricted in space by the upper arm 91 and the shaft tube 71. The lower arm 92 cannot fully approach the back side of the shaft tube 71 and is positioned slightly below the back side of the shaft tube 71, causing the curtain edge rod 81 to only rise to below the back side of the shaft tube 71. Therefore, when the curtain 80 is retracted, the curved arm mechanism connecting the curtain roll-up shaft assembly 70 and the curtain edge rod 81 on both sides of the windshield sunshade, in the retracted state, still causes the curtain edge rod 81 connected to the two curved arm assemblies 90 to droop below the shaft tube 71 of the curtain roll-up shaft assembly 70. The curtain 80 cannot be completely rolled into the shaft tube 71. The combined visual area occupied by the original curtain roll-up shaft assembly 70 on the windshield, plus the visual area occupied by the drooping curtain 80 connected by the curved arm mechanism, results in a reduction in the driver's field of vision in the motor vehicle. Blind spots can easily create blind spots for drivers, which is detrimental to the driving safety of motor vehicles.

[0004] Furthermore, after the curved arm mechanism connecting the curtain roll-up shaft assembly 70 and the curtain edge rod 81 on both sides of the windshield sunshade is closed, the curtain edge rod 81 connecting the curtain 80 still hangs down below the shaft tube 71 of the curtain roll-up shaft assembly 70, and the two curved arm assemblies 90 of the curved arm mechanism fail to fold completely, resulting in the curtain edge rod 81 not being securely positioned. During vehicle operation, the curtain edge rod 81 is prone to swaying or colliding with other components.

[0005] Based on the driving safety of motor vehicles, how to overcome the problems of the articulated arm mechanism affecting the driver's field of vision and the difficulty in stable positioning of the curtain edge rod after the curtain is closed is a key issue that needs to be addressed in the current windshield sunshade. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a hinged arm linkage mechanism for a windshield sunshade, which improves the technical problems of existing windshield sunshade hinged arm mechanisms affecting the driver's field of vision and making it difficult to stably position the curtain side rod after the curtain is closed.

[0007] The technical solution proposed in this invention is: to provide a curved arm linkage mechanism for a front windshield sunshade, which is used to assemble between a curtain roll-up shaft assembly of a front windshield sunshade and a curtain that can be rolled up and released by the curtain roll-up shaft assembly, wherein the curved arm linkage mechanism includes: Two curved arm assemblies are configured at both axial ends of the curtain retraction shaft assembly and extend and fold back on the opposite side of the curtain's unfolding and retraction direction. Each curved arm assembly includes an upper arm, a lower arm, and a pivot member. One end of the upper arm is pivotally connected to the opposite side of the end of a shaft tube of the curtain retraction shaft assembly. The lower arm includes an arm portion, and a connecting portion at one end of the arm portion is pivotally connected to the other end of the upper arm. The arm portion of the lower arm is located on the opposite side of the upper arm and has an offset gap. The other end of the arm portion is pivotally connected to the pivot member. Both curved arm assemblies can be folded back to the opposite side of the shaft tube, and the folded lower arm is located on the opposite side of the upper arm. A curtain edge rod is assembled to a movable edge of the curtain. The curtain edge rod includes a grooved rod portion and a storage groove is formed in the curtain edge rod. The upper front section of the curtain edge rod forms at least one clearance space communicating with the storage groove. The pivot members of the two curved arm assemblies are respectively pivotally mounted at both ends of the axial direction in the storage groove of the curtain edge rod. The two curved arm assemblies, when folded, can drive the curtain edge rod to the back side of the shaft tube. The upper arm rod is located between the shaft tube and the curtain edge rod. The lower arm rod is located in the storage groove through the clearance space, so that the bottom edge of the curtain edge rod and the bottom edge of the shaft tube are approximately at the same height.

[0008] In the aforementioned curved arm linkage mechanism of the front windshield sunshade, the connecting part of the lower arm forms a bent section, causing the arm part of the lower arm to deviate from the offset distance relative to the back side of the upper arm.

[0009] In the aforementioned windshield sunshade arm linkage mechanism, the connecting part of the lower arm is a straight section extending from the arm section, and a gasket is provided between the connecting part and the other end of the upper arm, so that the arm section of the lower arm is offset from the back side of the upper arm relative to the offset distance.

[0010] In the aforementioned windshield sunshade arm linkage mechanism, an elastic element is provided in the storage groove of the curtain edge rod. Each end of the elastic element is connected to the pivot of the two arm assemblies by a flexible strip, and provides elasticity to the two arm assemblies when they extend and retract.

[0011] In the aforementioned curved arm linkage mechanism of the front sunshade, the curtain side rod is provided with a handle, which includes a fixed part and a hand part located at the bottom end of the fixed part. The fixed part is fixed to the middle section of the curtain side rod, and the hand part extends to the front side relative to the opening and closing direction of the curtain. When the two curved arm assemblies can be folded to the back side of the shaft tube, the hand part is close to the bottom edge of the shaft tube.

[0012] In the aforementioned curved arm linkage mechanism of the front sunshade, the curtain side rod further has a front side plate and a back side plate that extend upward from the groove rod and are spaced apart, and the clearance space is provided in the front side plate.

[0013] In the aforementioned curved arm linkage mechanism of the front windshield sunshade, the front plate of the curtain edge rod has two clearance spaces, and the connecting part of the lower arm rod of the two folded curved arm assemblies can pass through the two clearance spaces respectively.

[0014] In the aforementioned curved arm linkage mechanism of the front windshield sunshade, the front plate of the curtain edge rod has a clearance space, and the connecting parts of the lower arm rods of the two folded curved arm assemblies can pass through the clearance space together.

[0015] In the aforementioned windshield sunshade arm linkage mechanism, an elastic element is provided in the storage groove of the curtain side rod. Each end of the elastic element is connected to the pivot of the two curved arm assemblies by a flexible strip, and provides elasticity for the extension and retraction of the two curved arm assemblies. The curtain side rod is provided with a handle, which includes a fixed part and a hand part located at the bottom end of the fixed part. The fixed part is fixed to the middle section of the curtain side rod, and the hand part extends to the front side relative to the extension and retraction direction of the curtain. When the two curved arm assemblies can be retracted to the back side of the shaft tube, the hand part is close to the bottom edge of the shaft tube.

[0016] The curved arm linkage mechanism of the front windshield sunshade of the present invention is configured in the front windshield sunshade and connected between the curtain roll-up shaft assembly and the curtain edge rod of the movable edge of the curtain, assisting in the operation of the curtain's unfolding and closing. Based on this, the curved arm linkage mechanism of the front windshield sunshade of the present invention achieves the following beneficial effects: 1. Effectively reduces the field of vision occupied by the windshield sunshade after it is closed: The articulated arm linkage mechanism of this invention, with its special spatial combination structure of upper and lower arm rods, and the curtain edge rod that can accommodate the lower arm rod, allows the upper and lower arm rods in the articulated arm linkage mechanism to completely merge after the curtain is closed, and drives the curtain edge rod to rise to the back side of the shaft tube of the curtain roll-up shaft assembly. The bottom edge of the curtain edge rod located on the back side of the shaft tube is at the same position as the bottom edge of the shaft tube. The curtain edge rod will not occupy more visual area below the curtain roll-up shaft assembly. Compared with existing windshield sunshades, the articulated arm linkage mechanism of this invention can effectively improve and reduce the problem of the excessive field of vision occupied by existing windshield sunshades after they are closed, reduce the blind spot area of ​​the driver, and improve the driving safety of the vehicle.

[0017] 2. Effectively reduces the swaying of the curtain edge rod: As mentioned above, the crank arm linkage mechanism of the present invention can, after the curtain is retracted by the crank arm linkage mechanism, allow the upper and lower arm rods in the crank arm linkage mechanism to be folded back to a near-joined state. Furthermore, it can drive the curtain edge rod to rise to the back side of the shaft tube of the curtain retraction shaft assembly, so that the bottom edge of the curtain edge rod is close to the bottom edge of the shaft tube. With the curtain edge rod close to the back side of the shaft tube, and with the support of the two crank arm assemblies and the tight pull of the retracted curtain, the swaying amplitude of the curtain edge rod can be reduced when the vehicle is in motion, thereby reducing the possibility of collision. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the articulated arm linkage mechanism of the present invention, installed in the front sunshade, in the unfolded state of the curtain.

[0019] Figure 2 This is a three-dimensional schematic diagram of another embodiment of the articulated arm linkage mechanism of the present invention, installed in the front sunshade, in the unfolded state of the curtain.

[0020] Figure 3 yes Figure 1 The illustrated embodiment of the articulated arm linkage mechanism is shown in a side view of the curtain in its unfolded state.

[0021] Figure 4 yes Figure 1 A magnified view of a portion of the image.

[0022] Figure 5 This is a partial perspective view of another embodiment of the articulated arm linkage mechanism of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of an embodiment of the articulated arm linkage mechanism of the present invention, installed in the front sunshade, in the closed state of the curtain.

[0024] Figure 7 This is a partial planar schematic diagram of an embodiment of the articulated arm linkage mechanism of the present invention, installed in the front sunshade, in the closed state of the curtain.

[0025] Figure 8 yes Figure 1 The illustrated embodiment of the articulated arm linkage mechanism is shown as a cross-sectional end view of the front sunshade in the closed state.

[0026] Figure 9 This is a three-dimensional schematic diagram of the existing windshield sunshade in the unfolded state.

[0027] Figure 10 yes Figure 9 The diagram shows a side view of an existing front windshield sunshade in the unfolded state.

[0028] Figure 11 yes Figure 9The diagram shows a three-dimensional representation of an existing front windshield sunshade in the retracted state.

[0029] Figure 12 yes Figure 9 The diagram shows a cross-sectional end view of an existing front windshield sunshade in the retracted state. Detailed Implementation

[0030] The following description, in conjunction with the accompanying drawings and embodiments of the present invention, further illustrates the technical solutions adopted by the present invention to achieve the intended inventive objective.

[0031] like Figure 1 The diagram illustrates an embodiment of the articulated arm linkage mechanism 3 of the present invention, installed in a front sunshade. Please refer to the accompanying diagram. Figure 1 and Figure 8 Basically, the front sunshade includes a curtain roll-up assembly 1 and a curtain 2 that can be rolled up and released by the curtain roll-up assembly 1. The curtain roll-up assembly 1 can be an existing product. Basically, the curtain roll-up assembly 1 includes a shaft tube 10, an inner tube 11, and a torsion elastic component 12. The inner tube 11 is installed inside the shaft tube 10. The torsion elastic component 12 is connected between the inner tube 11 and the sealing tube at the end of the shaft tube 10. The curtain 2 is connected to the inner tube 11 through an elongated groove 101 at the bottom back side of the shaft tube 10. The torsion elastic component 12 provides torsion elasticity to the inner tube 11, so that the curtain 2 can be rolled up into the shaft tube 10 by the curtain roll-up assembly 1, and the curtain 2 can be pulled out and unfolded from the shaft tube 10. The unfolding and retracting direction of the curtain 2 is along the up and down direction.

[0032] like Figure 1 As shown, the curved arm linkage mechanism 3 of the present invention is assembled between the curtain roll-up shaft assembly 1 and the curtain 2 of the front sunshade. The curved arm linkage mechanism 3 includes two curved arm assemblies 30 and a curtain edge rod 40. The two curved arm assemblies 30 are configured at both ends of the axial direction of the curtain roll-up shaft assembly 1 and can extend and fold back on the back side of the curtain 2 in the opening and closing direction. The curtain edge rod 40 is set on a movable side of the curtain 2 that extends out of the shaft tube 10, and the curtain edge rod 40 connects the two curved arm assemblies 30. By operating the two curved arm assemblies 30, the curtain edge rod 40 connected to the curtain 2 is raised and lowered, which, together with the curtain roll-up shaft assembly 1, rolls up and releases the curtain 2, so that the curtain 2 can be opened and closed.

[0033] like Figure 1 , Figure 3 and Figure 4As shown, each of the crank arm assemblies 30 includes an upper arm 31, a lower arm 32, and a pivot member 33. One end of the upper arm 31 is pivotally connected to the back side of the end of a shaft tube 10 of the curtain roll-up shaft assembly. The lower arm 32 includes an arm portion 320 and a connecting portion 321A and a connecting portion 322 located at both ends of the arm portion 320. The connecting portion 321A is pivotally connected to the other end of the upper arm 31, and the arm portion 320 of the lower arm 32 has an offset distance D relative to the back side of the upper arm 31. The connecting portion 322 is pivotally connected in the pivot member 33. Both crank arm assemblies 30 can be folded back to the back side of the shaft tube 10, and the folded lower arm 32 is located on the back side of the upper arm 31.

[0034] like Figure 1 , Figure 3 and Figure 4 In the illustrated embodiment, the connecting portion 321A of the lower arm 32 forms a bent section, causing the arm portion 320 of the lower arm 32 to deviate from the offset distance D relative to the back side of the upper arm 31. For example... Figure 5 In another embodiment shown, the connecting portion 321B of the lower arm 32 can also be changed to a straight section extending from the arm portion 320, and a gasket 323 is provided between the connecting portion 321B and the other end of the upper arm 31, so that the arm portion 320 of the lower arm 32 is offset from the offset distance D relative to the back side of the upper arm 31.

[0035] like Figure 1 , Figure 4 and Figure 8 As shown, the curtain edge rod 40 is assembled on the movable side of the curtain 2. The curtain edge rod 40 includes a grooved rod portion 41, and a receiving groove 410 with the groove opening facing upward is formed in the curtain edge rod 40. The upper front section of the curtain edge rod 40 forms at least one clearance space 411 communicating with the receiving groove 410. The movable side of the curtain 2 extending out of the outer side of the shaft tube 10 is connected to the front side of the curtain edge rod 40. The pivot members 33 of the two curved arm assemblies 30 are respectively pivotally mounted at both axial ends in the receiving groove 410 of the curtain edge rod 40. The two folded arm assemblies 30 can drive the curtain edge rod 40 to the back side of the shaft tube 10. The upper arm rod 31 is located between the back side of the shaft tube 10 and the front side of the curtain edge rod 40. The lower arm rod 32, which is pivotally connected to the pivot member 33, can extend into the storage groove 410 of the curtain edge rod 40. The connecting part 321A of the lower arm rod 32, which is pivotally connected to the upper arm rod 31, passes through the clearance space 411 so that the bottom edge position of the curtain edge rod 40 and the bottom edge position of the shaft tube 10 are approximately at the same height.

[0036] like Figure 1 , Figure 4 and Figure 8In the illustrated embodiment, preferably, the curtain edge rod 40 further comprises a front edge plate portion 43 and a back edge plate portion 42 extending upward from the groove rod portion 41 and spaced apart front to back. The opening of the storage groove 410 extends between the front edge plate portion 43 and the back edge plate portion 42, and the clearance space 411 is provided in the front edge plate portion 43. The pivot member 33 of the two curved arm assemblies 30 is pivotally disposed between the front edge plate portion 43 and the back edge plate portion 42, and the pivot member 33 obtains better support force, enabling the two curved arm assemblies 30 to extend and fold smoothly. When the two folded arm assemblies 30 move the curtain edge rod 40 to the back side of the shaft tube 10, the upper arm rod 31 is located between the shaft tube 10 and the front plate portion 43 of the curtain edge rod 40, and the lower arm rod 32 is located between the front plate portion 43 and the back plate portion 42. The connecting portion 321A of the lower arm rod 32, which is pivotally connected to the upper arm rod 31, passes through the clearance space 411. In this way, the curtain edge rod 40 can be closer to the back side of the shaft tube 10.

[0037] exist Figure 1 In the illustrated embodiment, the front panel portion 43 has two clearance spaces 411, through which the connecting portions 321A of the lower arm 32 of the two folded crank arm assemblies 30 can pass respectively. Figure 2 In another embodiment shown, the front plate portion 43 may be modified to have only one clearance space 411, through which the connecting portions 321A of the lower arm rods 32 of the two folded-down crank arm assemblies 30 can pass together through the clearance space 411.

[0038] like Figure 1 As shown, the storage groove 410 of the curtain edge rod 40 is also provided with an elastic element 50. The elastic element 50 can be a tension spring or other elastic element. The two ends of the elastic element 50 are respectively connected to the pivot joints 33 of the two curved arm assemblies 30. Alternatively, the two ends of the elastic element 50 are respectively connected to a flexible strip 51 to the pivot joints 33 of the two curved arm assemblies 30, providing elasticity for the extension and retraction of the two curved arm assemblies 30. With the assistance of the elasticity, it is easier for the user to manually operate the curved arm linkage mechanism 3 to drive the curtain 2 to unfold and retract.

[0039] like Figure 1 and Figure 8 As shown, to facilitate manual operation by the user, the curtain side rod 40 is also provided with a handle 60. The handle 60 includes a fixed part 61 and a hand part 62. The fixed part 61 is fixed to the middle section of the curtain side rod 40, and the hand part 62 is located at the bottom end of the fixed part 61 and extends towards the front side of the curtain 2 in the opening and closing direction. When the two curved arm assemblies 30 are folded to the back side of the shaft tube 10, the hand part 62 can approach the bottom edge of the shaft tube 10.

[0040] The articulated arm linkage mechanism 3 of this invention is applied to the windshield sunshade, wherein the shaft tube 10 of the windshield sunshade curtain roll-up shaft assembly 1 is fixed to the upper end of the windshield of the motor vehicle. For example... Figure 1 and Figure 3 As shown, when the curtain 2 is unfolded, the user holds the handle 62 and pulls down the curtain side rod 40. The curtain 2 is pulled down from the shaft tube 10 by the curtain side rod 40. At the same time, the two curved arm assemblies 30 connected between the two sides of the shaft tube 10 and the curtain side rod 40 support the curtain side rod 40 evenly. Furthermore, the elastic element 50 installed in the curtain side rod 40 provides auxiliary elastic force to the two extended curved arm assemblies 30, which counteracts the effect of the torsional elastic component 12 in the curtain roll-up shaft assembly 1 on the curtain 2 and maintains the stability of the curtain 2 after it is unfolded.

[0041] When curtain 2 is closed, as Figure 1 , Figures 6 to 8 As shown, the user holds the handle 62 of the handle 60 and pushes the curtain edge rod 40 upward. Combined with the torsional elastic component 12 in the curtain roll-up shaft assembly 1, the curtain 2 is rolled up. The pushed curtain edge rod 40 also drives the two curved arm assemblies 30 to fold up. The elastic element 50 installed in the curtain edge rod 40 provides a restoring elastic force to the two folded curved arm assemblies 30, so that the curtain 2 is automatically and smoothly rolled up into the shaft tube 10 of the curtain roll-up shaft assembly 1.

[0042] like Figure 8 As shown above, in the two curved arm assemblies 30 of the curved arm linkage mechanism 3, the upper arm rod 31 and the lower arm rod 32 after being folded up can reach a state that is closer to complete and combined, thereby driving the curtain edge rod 40 to rise to the back side position of the shaft tube 10 of the curtain roll-up shaft assembly 1. The upper arm rod 31 of the two curved arm assemblies 30 is located between the shaft tube 10 and the curtain edge rod 40, and the lower arm rod 32 enters the storage groove 410 of the curtain edge rod 40. The connecting part 321A of the lower arm rod 32 pivotally connected to the upper arm rod 31 passes through the clearance space 411 of the curtain edge rod 40 without obstruction, so that the bottom edge position of the curtain edge rod 40 and the bottom edge position of the shaft tube 10 are close to the same height. That is, after the curtain 2 is rolled up, the field of vision height H occupied by the front sunshade is only equivalent to the height (diameter) of the shaft tube 10. In this way, the curtain edge rod 40 will not occupy more visual area below the curtain roll-up shaft assembly 1. Compared with the existing windshield sunshade, the curved arm linkage mechanism 3 of the present invention, when applied to the windshield sunshade, can reduce the blind spot area of ​​the driver of the motor vehicle and enable the curtain edge rod 40 to be stably positioned on the back side of the shaft tube 10.

[0043] On the other hand, after the crank arm linkage mechanism 3, in conjunction with the curtain roll-up shaft assembly 1, drives the curtain 2 to retract, the upper arm rod 31 and the lower arm rod 32 in the crank arm linkage mechanism 3 can be folded back to a near-joined state. This further drives the curtain edge rod 40 to rise to the back side of the shaft tube 10 of the curtain roll-up shaft assembly 1, making the bottom edge of the curtain edge rod 40 close to the bottom edge of the shaft tube 10. With the curtain edge rod 40 close to the back side of the shaft tube 10, and with the support of the two crank arm assemblies 30 and the tight pull of the rolled-up curtain 2, the swaying amplitude of the curtain edge rod 40 can be reduced when the motor vehicle is in motion, thereby reducing the collision situation.

[0044] The above description is merely an embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A hinged arm linkage mechanism for a front sunshade, used for assembly between a curtain roll-up shaft assembly of a front sunshade and a curtain that can be rolled up and released by the curtain roll-up shaft assembly, characterized in that, The articulated boom linkage mechanism includes: Two curved arm assemblies are configured at both axial ends of the curtain retraction shaft assembly and extend and fold back on the opposite side of the curtain's unfolding and retraction direction. Each curved arm assembly includes an upper arm, a lower arm, and a pivot member. One end of the upper arm is pivotally connected to the opposite side of the end of a shaft tube of the curtain retraction shaft assembly. The lower arm includes an arm portion, and a connecting portion at one end of the arm portion is pivotally connected to the other end of the upper arm. The arm portion of the lower arm is located on the opposite side of the upper arm and has an offset gap. The other end of the arm portion is pivotally connected to the pivot member. Both curved arm assemblies can be folded back to the opposite side of the shaft tube, and the folded lower arm is located on the opposite side of the upper arm. A curtain edge rod is assembled to a movable edge of the curtain. The curtain edge rod includes a grooved rod portion and a storage groove is formed in the curtain edge rod. The upper front section of the curtain edge rod forms at least one clearance space communicating with the storage groove. The pivot members of the two curved arm assemblies are respectively pivotally mounted at both ends of the axial direction in the storage groove of the curtain edge rod. The two curved arm assemblies, when folded, can drive the curtain edge rod to the back side of the shaft tube. The upper arm rod is located between the shaft tube and the curtain edge rod. The lower arm rod is located in the storage groove through the clearance space, so that the bottom edge of the curtain edge rod and the bottom edge of the shaft tube are approximately at the same height.

2. The arm linkage mechanism of the front windshield sunshade according to claim 1, characterized in that, The lower arm connection portion forms a bent section, causing the arm portion of the lower arm to deviate from the offset distance relative to the back side of the upper arm.

3. The curved arm linkage mechanism of the front windshield sunshade according to claim 1, characterized in that, The lower arm connecting portion is a straight section extending from the arm portion, and a gasket is provided between the connecting portion and the other end of the upper arm, so that the arm portion of the lower arm is offset from the back side of the upper arm relative to the offset distance.

4. The arm linkage mechanism of the front windshield sunshade according to any one of claims 1 to 3, characterized in that, The storage groove of the curtain edge rod is provided with an elastic element. Each end of the elastic element is connected to the pivot of the two curved arm assemblies by a flexible strip, and provides elasticity for the extension and retraction of the two curved arm assemblies.

5. The arm linkage mechanism for the front windshield sunshade according to any one of claims 1 to 3, characterized in that, The curtain edge rod is provided with a handle, which includes a fixed part and a hand part located at the bottom end of the fixed part. The fixed part is fixed to the middle section of the curtain edge rod, and the hand part extends to the front side relative to the opening and closing direction of the curtain. When the two curved arm assemblies can be folded to the back side of the shaft tube, the hand part is close to the bottom edge of the shaft tube.

6. The arm linkage mechanism for the front windshield sunshade according to any one of claims 1 to 3, characterized in that, The curtain edge rod further has a front edge plate and a back edge plate that extend upward from the grooved rod portion and are spaced apart, with the clearance space provided in the front edge plate portion.

7. The arm linkage mechanism of the front windshield sunshade according to claim 6, characterized in that, The front panel of the curtain edge rod has two clearance spaces, and the connecting parts of the lower arm rods of the two folded-down curved arm assemblies can pass through the two clearance spaces respectively.

8. The arm linkage mechanism of the front windshield sunshade according to claim 6, characterized in that, The front panel of the curtain edge rod has a clearance space, through which the connecting parts of the lower arm rods of the two folded-down curved arm assemblies can pass together.

9. The arm linkage mechanism of the front windshield sunshade according to claim 6, characterized in that, The storage groove of the curtain edge rod is provided with an elastic element. Each end of the elastic element is connected to the pivot of the two curved arm assemblies by a flexible strip, and provides elasticity for the extension and retraction of the two curved arm assemblies. The curtain edge rod is provided with a handle, which includes a fixed part and a hand part located at the bottom end of the fixed part. The fixed part is fixed to the middle section of the curtain edge rod, and the hand part extends to the front side relative to the opening and closing direction of the curtain. When the two curved arm assemblies can be folded to the back side of the shaft tube, the hand part is close to the bottom edge of the shaft tube.

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