Self-locking structure of sunshade curtain reel

Abstract

The utility model belongs to the technical field of sunshade curtain reels, and particularly relates to a self-locking structure of a sunshade curtain reel, which comprises a self-locking shaft block and a self-locking shaft sleeve, a coil spring is connected onto the self-locking shaft sleeve, a self-locking track groove and an axial opening groove are distributed between the self-locking shaft block and the self-locking shaft sleeve, and a ball is connected between the axial opening groove and the self-locking track groove in a rolling manner. The self-locking track groove comprises a forward ring section, a reverse ring section, a first one-way structure and a self-locking section, a second one-way structure is arranged between the self-locking section and the forward ring section, and a locking position and a third one-way structure are arranged in the self-locking section. The self-locking curtain is simple in structure and reasonable in design, a user does not need to observe and predict the specific position condition of the ball, the ball can be driven to be in rolling fit among the forward ring section, the self-locking section and the reverse ring section only through the operation of pulling down and loosening the curtain, then the self-locking and automatic winding functions of the curtain are achieved, and operation is easy, convenient and reliable.

Description

Technical field:

[0001] The utility model belongs to the technical field of sunshade curtain rollers, in particular to a self-locking structure of a sunshade curtain roller. Background technology:

[0002] A sunshade is a device used to block sunlight on a mobile vehicle. It basically includes a curtain wound on a drum. The drum is rotatably connected to a connecting shaft, and a coil spring is provided on the connecting shaft. The function of the coil spring is to allow the curtain to automatically wind up on the drum after being unlocked.

[0003] The existing Chinese utility model patent (authorization announcement number CN215859909U) discloses a vehicle sunshade with a self-locking function, which includes a bracket and a connecting shaft, the connecting shaft is arranged on the bracket, a roller is rotatably connected to the outside of the connecting shaft, a coil spring is arranged between the roller and the connecting shaft, the coil spring is arranged on the outer ring of the connecting shaft, one end of the coil spring is fixed on the connecting shaft, and the other end of the coil spring rotates with the roller, and also includes a self-locking device, the self-locking device includes a sleeve connected to the roller, and a guide column connected to the connecting shaft, the inner ring of the sleeve is provided with a vertical first channel, the outer ring of the guide column is provided with a circle of second channels, a ball is provided between the first channel and the second channel, and a plurality of check zones are provided on the second channel. When the ball runs to the check zone, the cross-section of the inner wall of the check zone that contacts the ball passes through the central axis of the sleeve.

[0004] That is, the above structure relies on the structure that the ball is located at the central axis of the sleeve when it is in the non-return zone. As long as the curtain is stopped when the ball is in the non-return zone, the force balance of the ball can be achieved in the non-return zone to achieve the purpose of self-locking. Correspondingly, its unlocking method only needs to apply a force to break the force balance of the ball. It can be seen that the premise of the structure to achieve locking is to determine in advance that the ball is located in the non-return zone, and the ball is set between the sleeve and the guide column. Unless the sleeve adopts a transparent structure so that the user can directly observe the position of the ball, it is difficult for the user to predict the specific position of the ball, that is, the user cannot confirm whether the ball happens to be located in the non-return zone when the curtain is stopped at this moment. Summary of the invention:

[0005] The purpose of the utility model is to provide a self-locking structure for a sunshade curtain roller, wherein the user does not need to observe the specific position of the expected ball, and can drive the ball to roll and cooperate between the forward ring segment, the self-locking segment and the reverse ring segment only by pulling down and loosening the curtain, thereby realizing the self-locking and automatic winding functions of the curtain, and the operation is simple, convenient and reliable.

[0006] The utility model is achieved in this way:

[0007] A self-locking structure of a sunshade roller shaft comprises a self-locking shaft block fixed in a relatively circumferential direction, and a self-locking shaft sleeve rotatably sleeved on the self-locking shaft block, a coil spring is connected to the self-locking shaft sleeve, and the elastic force of the coil spring drives the self-locking shaft sleeve to rotate in the opposite direction, a self-locking track groove and an axial opening groove arranged along the axial direction are relatively distributed inside and outside the self-locking shaft block and the self-locking shaft sleeve, a ball is rollingly connected between the axial opening groove and the self-locking track groove, and the self-locking track groove includes a spring that can provide the ball with continuous positive rolling A movable forward ring segment, a reverse ring segment capable of providing the ball with continuous reverse rolling, and a one-way structure one and a self-locking segment arranged between the forward ring segment and the reverse ring segment, the one-way structure one enabling the ball to roll forward from the reverse ring segment to the forward ring segment, a one-way structure two enabling the ball to roll reversely from the forward ring segment to the self-locking segment is arranged between the self-locking segment and the forward ring segment, a locking position capable of blocking the ball from rolling reversely is arranged in the self-locking segment, and a one-way structure three enabling the ball to roll forward from the locking position to the reverse ring segment.

[0008] In the above-mentioned self-locking structure of a sunshade curtain roller shaft, the one-way structure 1 includes a return inclined rail section having one end connected to the forward ring section and the other end connected to the reverse ring section through a guide branch path 1, the corresponding port of the return inclined rail section connected to the guide branch path 1 is set in the reverse direction, and a return guide protrusion is provided on the side wall surface of the guide branch path 1 for allowing the ball to roll from the reverse ring portion to the reverse side of the corresponding port of the return inclined rail section, and a forward guide surface is provided on the side wall surface of the guide branch path 1 for allowing the ball to roll from the reverse side of the corresponding port of the return inclined rail section to the reverse ring portion.

[0009] In the above-mentioned self-locking structure of a sunshade curtain roller, the one-way structure 2 includes a guide branch path 2 connecting the self-locking section and the forward ring section, the corresponding port of the self-locking section connected to the guide branch path 2 is arranged in the forward direction, and a self-locking guide protrusion is arranged on the side wall surface of the guide branch path 2 for allowing the ball to roll from the forward ring section to the forward side of the corresponding port of the self-locking section, and a reverse guide surface is provided on the side wall surface of the guide branch path 2 for allowing the ball to roll from the forward side of the corresponding port of the self-locking section to the forward ring section.

[0010] In the above-mentioned self-locking structure of the sunshade roller, the middle part of the self-locking section is bent in the reverse direction, and the locking position is the extreme point of the reverse bending of the self-locking section.

[0011] In the above-mentioned self-locking structure of a sunshade roller, the specific structure of the one-way structure three is: the reverse bending extreme point of the reverse side wall of the self-locking segment and the reverse bending extreme point of the positive side wall are axially staggered, and the reverse bending extreme point of the reverse side wall of the self-locking segment is arranged close to the reverse ring segment relative to the reverse bending extreme point of the positive side wall.

[0012] In the above-mentioned self-locking structure of the sunshade roller shaft, the self-locking track groove is provided on the outer wall surface of the self-locking shaft block, and the axial opening groove is provided on the inner wall surface of the self-locking shaft sleeve.

[0013] The outstanding advantages of the utility model compared with the prior art are:

[0014] The utility model has a simple structure and a reasonable design. The user does not need to observe the specific position of the expected ball. The user can drive the ball to roll and cooperate between the forward ring segment, the self-locking segment and the reverse ring segment only by pulling down and loosening the curtain, thereby realizing the self-locking and automatic winding functions of the curtain. The operation is simple, convenient and reliable. Description of the drawings:

[0015] Figure 1 It is an exploded view of the self-locking shaft block and the self-locking shaft sleeve of the utility model;

[0016] Figure 2 It is a front view of the self-locking shaft block of the utility model;

[0017] Figure 3 It is a left view of the self-locking shaft block of the utility model;

[0018] Figure 4 It is a rear view of the self-locking shaft block of the utility model.

[0019] In the figure: 1. Self-locking shaft block; 2. Self-locking shaft sleeve; 3. Axial opening groove; 4. Forward ring segment; 5. Reverse ring segment; 6. Self-locking segment; 7. Locking position; 8. Guide branching road one; 9. Return inclined rail segment; 10. Return guide protrusion; 11. Forward guide surface; 12. Guide branching road two; 13. Self-locking guide protrusion; 14. Reverse guide surface. Specific implementation method:

[0020] The present invention is further described below with reference to specific embodiments. Figure 1 —4:

[0021] A self-locking structure of a sunshade roller shaft comprises a self-locking shaft block 1 fixed in a relatively circumferential direction, and a self-locking shaft sleeve 2 rotatably sleeved on the self-locking shaft block 1, a coil spring is connected to the self-locking shaft sleeve 2, and the elastic force of the coil spring drives the self-locking shaft sleeve 2 to rotate in the opposite direction, a self-locking track groove and an axial opening groove 3 arranged along the axial direction are relatively distributed inside and outside between the self-locking shaft block 1 and the self-locking shaft sleeve 2, a ball is rollingly connected between the axial opening groove 3 and the self-locking track groove, and the self-locking track groove comprises a positive force that can provide the ball with continuous positive rolling The sunshade curtain reel has a forward ring segment 4, a reverse ring segment 5 capable of providing the ball with continuous reverse rolling, and a one-way structure 1 and a self-locking segment 6 arranged between the forward ring segment 4 and the reverse ring segment 5, wherein the one-way structure 1 enables the ball to roll forward from the reverse ring segment 5 to the forward ring segment 4, a one-way structure 2 is arranged between the self-locking segment 6 and the forward ring segment 4, which enables the ball to roll backward from the forward ring segment 4 to the self-locking segment 6, a locking position 7 capable of blocking the ball from rolling backward is arranged in the self-locking segment 6, and a one-way structure 3 capable of providing the ball to roll forward from the locking position 7 to the reverse ring segment 5. Among them, the specific structure of the sunshade curtain reel is the same as the prior art, that is, the existing sunshade curtain reel includes a connecting shaft, and a reel rotatably mounted on the connecting shaft, a curtain is wound on the reel, a coil spring is arranged between the reel and the connecting shaft, the self-locking shaft block 1 in this embodiment is fixedly connected to the connecting shaft, and the self-locking shaft sleeve 2 is synchronously rotatably connected to the reel.

[0022] The utility model has a simple structure and a reasonable design. The user does not need to observe the specific position of the expected ball. The user can drive the ball to roll and cooperate between the forward ring segment 4, the self-locking segment 6 and the reverse ring segment 5 only by pulling down and loosening the curtain, thereby realizing the self-locking and automatic winding functions of the curtain. The operation is simple, convenient and reliable.

[0023] Furthermore, the working principle of the utility model is as follows: the user pulls down a long length of the curtain and then loosens the curtain, so that the ball rolls forward in the forward ring section 4 as the curtain is pulled down, and when the curtain is loosened, the ball rolls in the reverse direction under the action of the coil spring and enters the locking position 7 in the self-locking section 6 through the one-way structure 2, thereby achieving self-locking.

[0024] When the curtain is pulled down only a little bit in the self-locking state and then released, the ball first enters the reverse ring segment 5 through the one-way structure 3 by rolling in the forward direction, and the curtain is released in the reverse ring segment 5. At this time, the ball will continue to roll in the reverse direction under the action of the winding spring, thereby realizing the automatic winding function of the curtain.

[0025] When a long curtain is pulled down in the self-locking state, the ball will enter the reverse ring segment 5 through the one-way structure three by rolling in the forward direction, and continue to roll in the forward direction through the one-way structure one into the forward ring segment 4, and finally continue to roll in the forward direction in the forward ring segment 4 until the user releases the curtain, and the ball will re-enter the locking position 7 of the self-locking segment 6 to achieve self-locking.

[0026] Among them, the one-way structure one, the one-way structure two and the one-way structure three can all adopt a one-way diaphragm or other existing one-way structures to achieve the restriction of the one-way rolling of the ball. In the present embodiment, the specific structure of the one-way structure one is as follows: the one-way structure one includes a return ramp section 9 which is connected to the forward ring section 4 at one end and connected to the reverse ring section 5 through a guide branch road 8 at the other end. The corresponding port of the return ramp section 9 connected to the guide branch road 8 is arranged in the reverse direction. A return guide protrusion 10 is arranged on the side wall surface of the guide branch road 8 for allowing the ball to roll from the reverse ring portion to the reverse side of the corresponding port of the return ramp section 9. The side wall surface of the guide branch road 8 has a forward guide surface 11 for allowing the ball to roll in the reverse direction from the reverse side of the corresponding port of the return ramp section 9 to the reverse ring portion. That is, with the help of the position guidance of the return guide protrusion 10 and the forward guide surface 11, the ball can roll forward through the return ramp section 9 into the forward ring section 4, and can continue to roll backward in the reverse ring section 5.

[0027] Similar to the above, the specific structure of the one-way structure 2 is as follows: the one-way structure 2 includes a guide bifurcation 12 connecting the self-locking segment 6 and the forward ring segment 4, the corresponding port of the self-locking segment 6 connected to the guide bifurcation 12 is arranged in the forward direction, the side wall surface of the guide bifurcation 12 is provided with a self-locking guide protrusion 13 that can allow the ball to roll from the forward ring segment 4 to the forward side of the corresponding port of the self-locking segment 6, and the side wall surface of the guide bifurcation 12 is provided with a reverse guide surface 14 that can allow the ball to roll forward from the forward side of the corresponding port of the self-locking segment 6 to the forward ring segment 4. That is, with the help of the position guiding effect of the self-locking guide protrusion 13 and the reverse guide surface 14, the ball can roll backward into the self-locking segment 6, and can continue to roll forward in the forward ring segment 4.

[0028] In order to provide the locking position 7 in the self-locking section 6, the middle part of the self-locking section 6 is bent in the reverse direction, and the locking position 7 is the extreme point of the reverse bending of the self-locking section 6. The self-locking section 6 can be V-shaped, U-shaped, J-shaped or hook-shaped.

[0029] Furthermore, in order to enable the ball to enter the reverse ring segment 5 from the locking position 7 when rolling in the forward direction, the specific structure of the one-way structure three is: the reverse bending extreme point of the reverse side wall of the self-locking segment 6 and the reverse bending extreme point of its forward side wall are axially offset, and the reverse bending extreme point of the reverse side wall of the self-locking segment 6 is arranged close to the reverse ring segment 5 relative to the reverse bending extreme point of its forward side wall.

[0030] In addition, in this embodiment, the self-locking track groove is provided on the outer wall surface of the self-locking shaft block 1 , and the axial opening groove 3 is provided on the inner wall surface of the self-locking shaft sleeve 2 .

[0031] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A self-locking structure for a sunshade roller shaft, comprising a self-locking shaft block (1) fixed in a relatively circumferential direction, and a self-locking shaft sleeve (2) rotatably mounted on the self-locking shaft block (1), a coil spring being connected to the self-locking shaft sleeve (2), and the elastic force of the coil spring driving the self-locking shaft sleeve (2) to rotate in the opposite direction, characterized in that: A self-locking track groove and an axial opening groove (3) arranged along the axial direction are relatively distributed inside and outside the self-locking shaft block (1) and the self-locking shaft sleeve (2); a ball is rollingly connected between the axial opening groove (3) and the self-locking track groove; the self-locking track groove comprises a forward ring segment (4) capable of allowing the ball to continuously roll in the forward direction, a reverse ring segment (5) capable of allowing the ball to continuously roll in the reverse direction, and a one-way structure 1 and a self-locking segment (6) arranged between the forward ring segment (4) and the reverse ring segment (5); the one-way structure 1 enables the ball to roll forward from the reverse ring segment (5) into the forward ring segment (4); a one-way structure 2 is arranged between the self-locking segment (6) and the forward ring segment (4) for enabling the ball to roll reversely from the forward ring segment (4) to the self-locking segment (6); a locking position (7) capable of blocking the ball from rolling in the reverse direction is arranged in the self-locking segment (6); and a one-way structure 3 is arranged for enabling the ball to roll forward from the locking position (7) to the reverse ring segment (5).

2. The self-locking structure of the sunshade roller according to claim 1, characterized in that: The one-way structure 1 comprises a return ramp section (9) having one end connected to the forward ring section (4) and the other end connected to the reverse ring section (5) through a guide branching path 1 (8); the corresponding port of the return ramp section (9) connected to the guide branching path 1 (8) is arranged in the reverse direction; a return guide protrusion (10) is arranged on the side wall surface of the guide branching path 1 (8) for allowing a ball to roll from the reverse ring section to the reverse side of the corresponding port of the return ramp section (9); and a forward guide surface (11) is arranged on the side wall surface of the guide branching path 1 (8) for allowing a ball to roll from the reverse side of the corresponding port of the return ramp section (9) to the reverse ring section.

3. The self-locking structure of the sunshade roller according to claim 1 is characterized in that: The one-way structure 2 comprises a guide bifurcation path 2 (12) connecting the self-locking section (6) and the forward ring section (4); the corresponding port of the self-locking section (6) connected to the guide bifurcation path 2 (12) is arranged in the forward direction; a self-locking guide protrusion (13) is arranged on the side wall surface of the guide bifurcation path 2 (12) for allowing a ball to roll from the forward ring section (4) to the forward side of the corresponding port of the self-locking section (6); and a reverse guide surface (14) is arranged on the side wall surface of the guide bifurcation path 2 (12) for allowing a ball to roll from the forward side of the corresponding port of the self-locking section (6) to the forward side of the forward ring section (4).

4. The self-locking structure of the sunshade roller according to claim 1 is characterized in that: The middle part of the self-locking section (6) is bent in the reverse direction, and the locking position (7) is the extreme point of the reverse bending of the self-locking section (6).

5. The self-locking structure of the sunshade roller according to claim 4 is characterized in that: The specific structure of the one-way structure three is that the reverse bending extreme point of the reverse side wall of the self-locking segment (6) is axially offset from the reverse bending extreme point of its positive side wall, and the reverse bending extreme point of the reverse side wall of the self-locking segment (6) is arranged close to the reverse ring segment (5) relative to the reverse bending extreme point of its positive side wall.

6. A self-locking structure for a sunshade roller according to any one of claims 1 to 5, characterized in that: The self-locking track groove is formed on the outer wall surface of the self-locking shaft block (1), and the axial opening groove (3) is formed on the inner wall surface of the self-locking shaft sleeve (2).

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