A magnetic deceleration structure and sunshade

Abstract

The present invention discloses a magnetic deceleration structure related to the technical field of automotive sunshade curtains, which solves the problem that the rotation speed of the shaft of the sunshade curtain is difficult to control. The technical points are: it includes a fixed shell, a shaft connecting part, a magnetic part and a deceleration sleeve. The magnetic part is connected to the fixed shell along the circumferential direction of the rotation of the shaft connecting part. The outer surface of the deceleration sleeve is cylindrical with the rotation center of the shaft connecting part as the axis. The deceleration sleeve is connected to the shaft connecting part in the circumferential direction. A accommodating cavity is provided in the deceleration sleeve. A magnetic conductive part is provided in the accommodating cavity. The cross section of the accommodating cavity at any point along the rotation axis of the shaft connecting part is circular with the axis of the deceleration sleeve as the center. The magnetic part is located on one side of the deceleration sleeve in the radial direction. A sunshade curtain is also disclosed, including a sunshade curtain main body and the magnetic deceleration structure mentioned above. The structure is simple, stable and reliable. It can provide resistance to the rotation of the shaft while reducing the influence of the wear of the deceleration sleeve on the deceleration effect.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle sunshade curtains, in particular to a magnetic deceleration structure and a sunshade curtain. Background Art

[0002] Cars are an important means of transportation for people to travel, providing convenience for people to travel. Since cars are often outdoors, when the sun shines into the cabin through the windows, the interior of the car becomes hot, and the strong light will also cause inconvenience to the driver.

[0003] In order to block the sunlight from shining into the cabin through the car window, people have made car sunshade roller blinds. When the sunshade roller blinds are not in use, the curtains are rotated and rolled up through the shaft. When it is necessary to block the sunlight, the curtains are pulled, and the curtains drive the shaft to rotate and unroll the curtains from the shaft; when it is not necessary to block the sunlight, the shaft is driven to rotate and the shaft rolls up the curtains, so that the curtains cannot block the car windows, making it convenient for people to drive the vehicle.

[0004] Due to the limited space in the car, over-unfolding the curtains will cause the curtains to occupy too much space, causing inconvenience in use. When the rotation speed of the shaft is too fast, the speed of rolling and unfolding the curtains will also be too fast, causing inconvenience in control. Moreover, when the driving shaft stops rotating, the shaft is likely to continue to rotate at a large angle due to inertia, causing the curtains to be over-rolled and unfolded. During the process of the shaft rolling up the curtains, if the shaft rotates too fast, the curtains will also shake greatly, which is easy to cause the curtains to collide with other objects and affect their service life. Therefore, there is a problem in the prior art that the rotation speed of the shaft of the sunshade is difficult to control. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a magnetic deceleration structure and a sunshade, which have the advantage of being able to reduce the rotation speed of the shaft for convenient control.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A magnetic deceleration structure comprises a fixed shell, a rotating shaft connecting part, a magnetic part and a reduction sleeve. The magnetic part is clamped with the fixed shell along the circumferential direction of the rotating shaft connecting part. The outer surface of the reduction sleeve is generally cylindrical with the rotation center of the rotating shaft connecting part as the axis. The reduction sleeve is circumferentially clamped with the rotating shaft connecting part. A accommodating cavity is provided in the reduction sleeve. A magnetic conductive part is provided in the accommodating cavity. Any cross-section of the accommodating cavity along the rotation axis direction of the rotating shaft connecting part is circular with the axis center of the reduction sleeve as the center. The magnetic part is located on one side of the reduction sleeve in the radial direction.

[0008] As a further improvement of the present invention: the magnetic member is located below the reduction sleeve.

[0009] As a further improvement of the present invention: the magnetic conductive member is iron sand or iron beads.

[0010] As a further improvement of the present invention: a plastic layer is provided on the outer surface of the magnetic conductive member.

[0011] As a further improvement of the present invention: the reduction sleeve is fixedly connected to the support sleeve, the reduction sleeve is coaxial with the support sleeve, and the total volume of the magnetic conductive part does not exceed half of the volume of the accommodating cavity.

[0012] As a further improvement of the present invention: the magnetic conductive member is a discus, and the discus is provided with an arc-shaped surface that fits with the inner wall of the reduction sleeve.

[0013] As a further improvement of the present invention: the reduction sleeve is provided with a through hole communicating with the accommodating cavity, the width of the through hole is greater than the width of the magnetic conductive member, and the reduction sleeve is provided with a sealing member blocking the through hole.

[0014] As a further improvement of the present invention: the sealing member is a screw plug threadedly connected to the reduction sleeve.

[0015] As a further improvement of the present invention: the fixed shell is provided with a slot that cooperates with the magnetic member, and the extending direction of the slot is parallel to the rotation axis of the reduction sleeve.

[0016] A sunshade curtain comprises a sunshade curtain main body and the magnetic deceleration structure mentioned above, wherein the magnetic deceleration structure is installed on the sunshade curtain main body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The magnetic part has a tendency to move toward the direction close to the magnetic part through the magnetic force. When the reduction sleeve rotates, the magnetic part is kept close to the magnetic part under the action of the magnetic part, so that the magnetic part and the inner wall of the reduction sleeve generate friction. The friction force provides resistance to the rotation of the reduction sleeve, thereby reducing the rotation speed of the shaft, achieving the advantage of convenient control of the rotation speed of the shaft, preventing the curtain from being over-unfolded and rolled up, and facilitating the use of the sunshade.

[0019] After a period of use, even if the inner wall of the reduction sleeve has produced a certain amount of wear, the magnetic part can still make the magnetic conductive part abut against the inner wall of the reduction sleeve and generate friction, so that the reduction structure can continue to provide the function of reducing the shaft speed, facilitate the control of the shaft speed, and have higher reliability.

[0020] Since the maximum static friction force on the surface of the rotating shaft is greater than the sliding friction force, a larger maximum static friction force needs to be overcome in the process of driving the rotating shaft from stationary to rotating, and due to the inertia of the rotating shaft, a larger driving force is required when driving the rotating shaft from stationary to rotating. When the rotating shaft and the reduction sleeve of the deceleration structure are stationary, the magnetic conductive member does not hinder the rotation of the reduction sleeve, so the driving force required in the process of driving the rotating shaft from stationary to rotating can be reduced, achieving a labor-saving effect.

[0021] The deceleration structure is simple in structure, stable and reliable, and can provide resistance to the rotation of the rotating shaft while reducing the influence of the wear of the reduction sleeve on the deceleration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of Example 1;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure at AA in the middle;

[0024] Figure 3 It is a structural schematic diagram of Example 2;

[0025] Figure 4 It is a structural schematic diagram of Example 3;

[0026] Figure 5 This is a schematic diagram of the structure of Example 4.

[0027] Figure numerals: 11, fixed shell; 12, rotating shaft connecting part; 13, magnetic part; 14, slot; 21, reduction sleeve; 22, accommodating chamber; 23, magnetic conductive part; 24, arc surface; 25, plastic layer; 26, supporting sleeve; 27, through hole; 28, sealing part; 31, sunshade curtain body. DETAILED DESCRIPTION

[0028] The present invention is further described with reference to the accompanying drawings and embodiments:

[0029] Embodiment 1:

[0030] A magnetic deceleration structure, such as Figure 1 and Figure 2As shown, it includes a fixed shell 11, a rotating shaft connecting member 12, a magnetic member 13 and a reduction sleeve 21. The magnetic member 13 is a magnet. The magnetic member 13 is clamped with the fixed shell 11 along the circumferential direction of the rotating shaft connecting member 12. The rotating shaft connecting member 12 is connected to the rotating shaft of the sunshade. The reduction sleeve 21 is installed on the rotating shaft connecting member 12. The outer surface of the reduction sleeve 21 is generally cylindrical with the rotation center of the rotating shaft connecting member 12 as the axis. The reduction sleeve 21 is clamped with the rotating shaft connecting member 12 in the circumferential direction. A accommodating chamber 22 is provided in the reduction sleeve 21. A magnetic conductive member 23 is provided in the accommodating chamber 22. Any cross section of the accommodating chamber 22 along the rotation axis direction of the rotating shaft connecting member 12 is a circle with the axis of the reduction sleeve 21 as the center. The magnetic member 13 is located on one side of the reduction sleeve 21 in the radial direction.

[0031] The magnetic member 13 is located below the reduction sleeve 21 .

[0032] The reduction sleeve 21 is fixedly connected to the support sleeve 26 . The reduction sleeve 21 and the support sleeve 26 are coaxial. The total volume of the magnetic conductive member 23 is half of the volume of the accommodating chamber 22 .

[0033] The magnetic conductive member 23 is iron sand.

[0034] The reduction sleeve 21 is provided with a through hole 27 communicating with the accommodating chamber 22 . The width of the through hole 27 is greater than the width of the magnetic conductive member 23 . The reduction sleeve 21 is provided with a sealing member 28 blocking the through hole 27 .

[0035] The sealing member 28 is a screw plug threadedly connected to the reduction sleeve 21 .

[0036] The fixed housing 11 is provided with a slot 14 that cooperates with the magnetic member 13 . The extending direction of the slot 14 is parallel to the rotation axis of the reduction sleeve 21 .

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The shaft connector 12 is used to connect the shaft on the sunshade. When the shaft rotates, the shaft connector 12 drives the reduction sleeve 21 to rotate. When the reduction sleeve 21 encounters resistance, the reduction sleeve 21 provides resistance to the rotation of the shaft through the shaft connector 12 and reduces the rotation speed of the shaft.

[0039] The magnetic member 13 uses magnetic force to make the magnetic member 23 have a tendency to move in the direction close to the magnetic member 13. When the reduction sleeve 21 rotates, the magnetic member 23 is kept in a position close to the magnetic member 13 under the action of the magnetic member 13, so that the magnetic member 23 and the inner wall of the reduction sleeve 21 generate friction. The friction force provides resistance to the rotation of the reduction sleeve 21, thereby achieving the effect of reducing the rotation speed of the shaft, achieving the advantage of conveniently controlling the rotation speed of the shaft, and preventing the curtain from being over-unfolded and rolled up, and facilitating the use of the sunshade.

[0040] After a period of use, even if the inner wall of the reduction sleeve 21 is worn to a certain extent, the magnetic component 13 can still make the magnetic conductive component 23 abut against the inner wall of the reduction sleeve 21 and generate friction, so that the reduction structure can continue to provide the function of reducing the shaft speed and has high reliability.

[0041] Since the maximum static friction force on the surface of the rotating shaft is greater than the sliding friction force, a larger maximum static friction force needs to be overcome in the process of driving the rotating shaft from static to rotation, and since the rotating shaft has the inertia of maintaining a static state when static, a larger driving force is required to overcome the inertia effect when driving the rotating shaft from static to rotation. When the rotating shaft and the reduction sleeve 21 are static, the deceleration structure does not produce a tendency of relative movement between the magnetic conductive part 23 and the reduction sleeve, so that the magnetic conductive part 23 at this time does not hinder the rotation of the reduction sleeve 21, thereby reducing the driving force required in the process of driving the rotating shaft from static to rotation, achieving a labor-saving effect and facilitating the use of the sunshade.

[0042] The deceleration structure is simple in structure, stable and reliable, and can provide resistance to the rotation of the shaft while reducing the influence of the wear of the deceleration sleeve 21 on the deceleration effect.

[0043] The magnetic component 23 has a tendency to move downward under the action of gravity. The magnetic component 13 is located below the reduction sleeve 21. The superposition of gravity and magnetic force can drive the magnetic component 23 to move in the direction close to the magnetic component 13, which can further increase the friction between the magnetic component 13 and the reduction sleeve 21, thereby increasing the effect of hindering the rotation of the shaft and facilitating the control of the rotation speed of the shaft.

[0044] The support sleeve 26 can provide support force for the reduction sleeve 21, and improve the structural stability of the reduction sleeve 21. The reduction sleeve 21 is coaxial with the support sleeve 26, so that the position of the support sleeve 26 remains unchanged when the reduction sleeve 21 drives the support sleeve 26 to rotate, and the magnetic conductive member 23 is prevented from hindering the rotation of the support sleeve 26. The total volume of the magnetic conductive member 23 is half of the volume of the accommodating chamber 22, so that the height of the magnetic conductive member 23 does not exceed the center height of the reduction sleeve 21 when it is stationary, and the support sleeve 26 is prevented from providing an upward support force to the magnetic conductive member 23, and it is ensured that the magnetic conductive member 23 can provide a sufficiently large resistance to the reduction sleeve 21.

[0045] The magnetic conductive member 23 is placed in the reduction sleeve 21 through the through hole 27, so as to facilitate the placement of the magnetic conductive member 23 in the accommodating cavity 22. The through hole 27 is blocked by the sealing member 28, so as to prevent the magnetic conductive member 23 from accidentally slipping out of the accommodating cavity 22 through the through hole 27.

[0046] The screw plug is tightened, and the screw plug is fixed on the reduction sleeve 21 by the self-locking of the screw plug. The magnetic conductive member 23 can be prevented from sliding out of the accommodating chamber 22 by blocking the through hole 27 by the screw plug.

[0047] During the rotation of the reduction sleeve 21, the iron sand can roll in the accommodating cavity 22, so that the friction between the magnetic conductive part 23 and the reduction sleeve 21 is converted into rolling friction with less friction, so that the magnetic conductive part 23 is more likely to move toward the magnetic part 13. This prevents the friction between the magnetic conductive part 23 and the reduction sleeve 21 from being too large, causing the magnetic conductive part 23 to rotate in a circle with the reduction sleeve 21, thereby improving reliability and stability.

[0048] The extending direction of the slot 14 is parallel to the rotation axis of the reduction sleeve 21 . The fixed shell 11 can provide the magnetic member 13 in the slot 14 with a circumferential support force for the rotation of the reduction sleeve 21 , thereby preventing the magnetic member 13 from moving under the interaction with the magnetic conductive member 23 .

[0049] In the direction of the rotation axis of the rotating shaft connecting member 12, the cross section of the accommodating chamber 22 is circular with the axis of the reduction sleeve 21 as the center, so that the center of the cross section of the accommodating chamber 22 is located on the rotation axis of the reduction sleeve 21. When the reduction sleeve 21 rotates, the distance between the end of the accommodating chamber 22 close to the magnetic member 13 and the magnetic member 13 is equal, so the magnetic force between the magnetic member 13 and the magnetic conductive member 23 can be maintained, preventing the magnetic force on the magnetic conductive member 23 from changing significantly, which causes a significant change in the resistance on the reduction sleeve 21 and the rotating shaft, thereby ensuring the smooth rotation of the rotating shaft.

[0050] Embodiment 2:

[0051] A magnetic deceleration structure, such as Figure 3 As shown, the difference between it and embodiment 1 is that the magnetic conductive member 23 is a discus, and the discus is provided with an arc surface 24 that fits with the inner wall of the reduction sleeve 21.

[0052] This embodiment has the following advantages:

[0053] The arrangement of the arc surface 24 makes the relative sliding of the discus and the reduction sleeve 21 smoother, reduces vibration and noise, provides a stable resistance to the rotating shaft, and facilitates the control of the rotating speed of the rotating shaft.

[0054] Embodiment 3:

[0055] A magnetic deceleration structure, which differs from Embodiment 1 in that the magnetic conductive member 23 is an iron bead.

[0056] This embodiment has the following advantages:

[0057] During the rotation of the reduction sleeve 21, the iron ball can roll in the accommodating cavity 22, so that the friction between the magnetic member 23 and the reduction sleeve 21 is converted into rolling friction with less friction, so that the magnetic member 23 can move closer to the magnetic member 13 more easily. This prevents the magnetic member 23 from rotating in a circle with the reduction sleeve 21 due to excessive friction between the magnetic member 23 and the reduction sleeve 21, thereby improving reliability and stability. It provides stable resistance to the shaft, making it easier to control the rotation speed of the shaft.

[0058] Embodiment 4:

[0059] A magnetic deceleration structure, such as Figure 4 As shown, the difference between the embodiment 1 and the embodiment 1 is that a plastic layer 25 is provided on the outer surface of the magnetic conductive member 23 .

[0060] This embodiment has the following advantages:

[0061] The plastic layer 25 has better elasticity, can absorb impact and increase friction, thereby increasing the resistance exerted by the magnetic conductive member 23 on the reduction sleeve 21, making it easier to control the rotation speed of the shaft and achieving the effect of reducing vibration and noise.

[0062] Embodiment 5:

[0063] A sunshade, such as Figure 5 As shown, the difference between it and Example 1 is that it includes a sunshade curtain body 31 and the magnetic deceleration structure described in Example 1, and the magnetic deceleration structure is installed on the sunshade curtain body 31.

[0064] This embodiment has the following advantages:

[0065] By installing a magnetic deceleration structure on the sunshade curtain body 31, resistance can be provided to the rotating shaft on the sunshade curtain, thereby controlling the rotation speed of the rotating shaft and achieving an effect of convenient use.

[0066] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental work, which all fall within the scope of protection of the present invention.

Claims

1. A magnetic deceleration structure, characterized in that: The invention comprises a fixed housing (11), a rotating shaft connecting member (12), a magnetic member (13) and a reduction sleeve (21); the magnetic member (13) is clamped with the fixed housing (11) along the circumferential direction of the rotating shaft connecting member (12); the outer surface of the reduction sleeve (21) is cylindrical with the rotation center of the rotating shaft connecting member (12) as the axis; the reduction sleeve (21) is clamped with the rotating shaft connecting member (12) in the circumferential direction; a receiving cavity (22) is provided in the reduction sleeve (21); a magnetic conductive member (23) is provided in the receiving cavity (22); any cross section of the receiving cavity (22) along the rotation axis direction of the rotating shaft connecting member (12) is circular with the axis of the reduction sleeve (21) as the center; the magnetic member (13) is located on one side of the reduction sleeve (21) in the radial direction; The magnetic conductive member (23) is iron sand or iron beads; The rotating shaft connecting member (12) is used to connect the rotating shaft on the sunshade. When the rotating shaft rotates, the rotating shaft connecting member (12) drives the reduction sleeve (21) to rotate. When the reduction sleeve (21) encounters resistance, the reduction sleeve (21) provides resistance to the rotation of the rotating shaft through the rotating shaft connecting member (12) and reduces the rotation speed of the rotating shaft. When the reduction sleeve (21) rotates, the magnetic conductive member (23) is kept at a position close to the magnetic member (13) under the action of the magnetic member (13), so that frictional force is generated between the magnetic conductive member (23) and the inner wall of the reduction sleeve (21); The reduction sleeve (21) is provided with a through hole (27) communicating with the accommodating cavity (22); the width of the through hole (27) is greater than the width of the magnetic conductive member (23); and the reduction sleeve (21) is provided with a sealing member (28) blocking the through hole (27).

2. A magnetic deceleration structure according to claim 1, characterized in that: The magnetic member (13) is located below the reduction sleeve (21).

3. A magnetic deceleration structure according to claim 1, characterized in that: The outer surface of the magnetic conductive component (23) is provided with a plastic layer (25).

4. A magnetic deceleration structure according to claim 1, characterized in that: The reduction sleeve (21) is fixedly connected to a support sleeve (26); the reduction sleeve (21) and the support sleeve (26) are coaxial; and the total volume of the magnetic conductive component (23) does not exceed half of the volume of the accommodating chamber (22).

5. A magnetic deceleration structure according to claim 1, characterized in that: The sealing member (28) is a screw plug threadedly connected to the reduction sleeve (21).

6. A magnetic deceleration structure according to claim 1, characterized in that: The fixed housing (11) is provided with a slot (14) that cooperates with the magnetic member (13), and the extending direction of the slot (14) is parallel to the rotation axis of the reduction sleeve (21).

7. A sunshade, characterized in that: It comprises a sunshade curtain body (31) and a magnetic deceleration structure according to any one of claims 1 to 6, wherein the magnetic deceleration structure is mounted on the sunshade curtain body (31).

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