Stretchable line capable of rotating smoothly

Abstract

The utility model discloses a flexible line capable of rotating smoothly, which comprises a shell and a reel, the reel is mounted in the shell, a rotating shaft is fixedly arranged in the shell, a first step is arranged on the rotating shaft, the reel is sleeved on the rotating shaft, a second step is arranged on the reel, and the second step is abutted against the first step. According to the utility model, through the step structure design, the contact area between the housing and the reel can be reduced, and the telescoping smoothness of the wire rod is greatly improved. According to the utility model, the bearing is sleeved on the rotating shaft in the shell, so that the rotating shaft can rotate more smoothly.

Description

TECHNICAL FIELD

[0001] The utility model discloses a retractable wire, especially a retractable wire with smooth rotation, belongs to the technical field of consumer electronics. BACKGROUND

[0002] The retractable wire is a wire material with telescopic function, which can be generally divided into: (1) double telescopic wire, which can be contracted from both ends to the middle or stretched from the middle to both ends; (2) single telescopic wire, which can only be stretched and contracted from one end, usually one end is fixed, and the other end can be freely stretched.

[0003] The retractable wire can be usually used in electronic devices, such as mouse retractable wire, earphone retractable wire, charger retractable wire, data retractable wire, computer camera retractable wire, etc.; can also be used in network communication, such as RJ45 network retractable wire, RJ11 telephone retractable wire, etc., and can also be used in occasions requiring cable length adjustment, such as fan retractable wire, medical device retractable wire, etc. The retractable wire can be contracted into a smaller volume when not in use, facilitating carrying and storage, solving the problem of traditional straight line carrying trouble, and being especially suitable for people who often travel on business or travel.

[0004] The retractable wire in the prior art is provided with a reel inside, when the retractable wire is pulled, the reel automatically expands the data line to make it longer, when the data line is released, the spring or other reel mechanism inside makes the data line automatically retract into the reel to restore the original length. Most retractable data lines are provided with a locking device, when the user pulls the data line to a suitable length, the locking device inside the reel clamps the data line to prevent it from automatically retracting. The user can unlock the data line by pulling the data line again or pressing a specific button to make it return to the telescopic state.

[0005] However, the current retractable wire structure is relatively simple, a rotating shaft is usually fixedly arranged inside the shell, a through hole is arranged on the reel, during assembly, the rotating shaft is inserted into the through hole, when the rotating shaft and the through hole are rotated relative to each other, the rotating shaft directly rubs against the inner side wall of the through hole, since the contact area between the rotating shaft and the through hole is large, a large friction force is generated during rotation, which makes the rotation not smooth, especially when the outer side of the rotating shaft or the inner side wall of the through hole is not finely processed, burrs are generated, which further affects the rotation, resulting in that whether the retractable wire is stretched out or retracted, it is easy to cause jamming and the like, and the sliding is not smooth. SUMMARY

[0006] In view of the above-mentioned problem in the prior art that the rotating shaft in the shell directly rubs against the inner side wall of the through hole on the reel, causing the sliding to be not smooth, the utility model provides a retractable wire with smooth rotation, which can reduce the contact area between the shell and the reel, and greatly improve the smoothness of the wire material.

[0007] This invention features a bearing mounted on the rotating shaft inside the outer casing, which makes its rotation smoother.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a telescopic line that rotates smoothly. The telescopic line includes a shell and a spool. The spool is installed inside the shell. A rotating shaft is fixedly installed inside the shell. A first step is provided on the rotating shaft. The spool is fitted on the rotating shaft. A second step is provided on the spool. The second step abuts against the first step.

[0009] The technical solution adopted by this utility model to solve its technical problem further includes:

[0010] The upper half of the rotating shaft has a larger diameter than the lower half, forming a first step structure on the rotating shaft. A rotating shaft hole is provided on the scroll, with a diameter greater than or equal to the lower half diameter and less than the upper half diameter. The rotating shaft hole is positioned at the first step on the rotating shaft.

[0011] A bearing cavity is provided below the shaft hole on the spool, and a bearing is installed in the bearing cavity. The bearing is fitted onto the lower half of the spool.

[0012] The outer shell includes a first shell and a second shell installed together. A slot is provided at the upper edge of the first shell, and a hook is fixedly provided at the corresponding position on the second shell. The hook engages with the slot, and the rotating shaft is fixedly located in the middle position inside the first shell.

[0013] A first positioning pin is fixedly provided at the edge of the second housing, and a first positioning hole is provided at the corresponding position on the first housing, and the first positioning pin is inserted into the first positioning hole.

[0014] A positioning shaft is fixedly installed at the middle position of the second housing, and the positioning shaft is positioned opposite to the lower half of the rotating shaft.

[0015] A winding shaft is fixedly installed on the side of the winding shaft facing the first housing. A first hanging interface is provided on the shaft, and a second hanging interface is provided on the side wall of the winding shaft. One end of the coil spring is hung on the first hanging interface, and the other end is hung on the second hanging interface.

[0016] A first circuit board is fixedly mounted on the spool for electrical connection with the cable wound on the spool. A second circuit board is mounted on the second housing. The first and second circuit boards are arranged opposite to each other. One or more conductive spring modules are fixedly mounted on the second circuit board. Each conductive spring module is provided with one or more conductive springs. A conductive ring is provided at a corresponding position on the first circuit board. The conductive ring and the conductive spring abut against each other.

[0017] The second housing is fixedly provided with a second positioning pin, and a second positioning hole is provided on the second circuit board, and the second positioning pin is inserted into the second positioning hole.

[0018] The second shell is internally fixedly provided with ball grooves, and balls are arranged in the ball grooves and directly or indirectly abut against the reel; the ball grooves and the balls are correspondingly provided with two groups or more, the two groups or more of the ball grooves and the balls are uniformly distributed along the center of the rotating shaft, the balls are spherical, the ball grooves are cylindrical, the inner diameter of the ball grooves is greater than or equal to the diameter of the balls, the depth of the ball grooves is less than the diameter of the balls, and the second circuit board is provided with through holes corresponding to the positions of the ball grooves, so that the balls pass through the through holes and contact the first circuit board.

[0019] The utility model discloses a beneficial effect is: the utility model discloses a step structure design can reduce the contact area between the shell and the reel, greatly improve the smoothness of wire material extension and contraction. The utility model discloses the bearing of the rotating shaft in the shell is sleeved, can make its rotation more smooth.

[0020] The utility model will be further described in connection with the drawings and specific embodiment. DRAWINGS

[0021] Figure 1 It is cross section structure schematic drawing of the utility model.

[0022] Figure 2 It is another view cross section structure schematic drawing of the utility model.

[0023] Figure 3 It is three-dimensional structure schematic drawing of the utility model.

[0024] Figure 4 It is exploded state structure schematic drawing of the utility model.

[0025] Figure 5 It is another view exploded state structure schematic drawing of the utility model.

[0026] Figure 6 It is cross section structure schematic drawing of the reel in the utility model.

[0027] Figure 7 It is another view cross section structure schematic drawing of the reel in the utility model.

[0028] In the drawing, 1-first shell, 11-bayonet, 12-rotating shaft, 13-first positioning hole, 14-first step, 2-second shell, 21-claw, 22-ball groove, 23-ball, 24-notch, 25-first positioning pin, 26-second positioning pin, 27-locking column, 28-positioning shaft, 3-reel, 31-winding shaft, 32-locking sliding slot, 33-locking clamping position, 34-second step, 35-bearing cavity, 4-first circuit board, 5-second circuit board, 51-through hole, 52-second positioning hole, 53-conductive spring piece module, 6-bearing. DETAILED DESCRIPTION

[0029] The embodiment is a preferred embodiment of the utility model, and other embodiments having the same or similar principles and basic structures as the embodiment are within the protection scope of the utility model.

[0030] Please refer to the attached drawings Figure 1 to the attached Figure 7 , the utility model mainly protects a flexible line that rotates smoothly, which mainly includes a shell and a reel 3, the reel 3 is installed in the shell, a rotating shaft 12 is fixedly arranged in the shell, a first step 14 is arranged on the rotating shaft 12, the reel 3 is sleeved on the rotating shaft 12, a second step 34 is arranged on the reel 3, the second step 34 abuts against the first step 14, so that the contact area of the reel 3 and the rotating shaft 12 is minimized, the frictional resistance between the shell and the reel can be reduced, and the rotation is more smooth.

[0031] In the embodiment, the upper half of the rotating shaft 12 has a larger diameter, the upper half is provided with a first hanging interface for connecting a coil spring, and the lower half of the rotating shaft 12 has a smaller diameter, so that a first step 14 structure is formed on the rotating shaft 12.

[0032] In the embodiment, a rotating shaft hole is formed in the reel 3, the diameter of the rotating shaft hole is greater than or equal to the diameter of the lower half of the rotating shaft 12 and less than the diameter of the upper half of the rotating shaft 12, so that the rotating shaft hole can be sleeved on the lower half of the rotating shaft 12 and clamped on the upper half of the rotating shaft 12, that is, the rotating shaft hole is clamped on the first step 14 of the rotating shaft 12, and in the utility model, the position of the rotating shaft hole on the reel 3 is defined as the second step 34.

[0033] In the embodiment, a bearing cavity 35 is arranged below the rotating shaft hole on the reel 3, so that the shape of the second step 34 is more obvious, a bearing 6 is installed in the bearing cavity 35, the bearing 6 is sleeved on the lower half of the rotating shaft 12, so that the sliding friction between the reel 3 and the shell can be converted into rolling friction of the bearing 6 through the bearing 6, the friction between the reel 3 and the shell is greatly reduced, and the sliding is more smooth.

[0034] In the embodiment, the shell comprises the first shell 1 and the second shell 2 which are mounted together, and a split shell design is adopted, so that the utility model is more convenient to assemble, and in specific implementation, a shell and cover plate type structure can also be adopted. In the embodiment, the first shell 1 is provided with the bayonet 11 at the upper edge position, and the second shell 2 is provided with the clasp 21 at the corresponding position, when the first shell 1 and the second shell 2 are assembled together, the clasp 21 is clamped into the bayonet 11, so as to realize the relative fixation between the first shell 1 and the second shell 2. In the embodiment, the first shell 1 is provided with the first positioning hole 13 at the corresponding position, and the second shell 2 is provided with the first positioning pin 25 at the edge position, when the first shell 1 and the second shell 2 are assembled, the first positioning pin 25 is inserted into the first positioning hole 13, so as to play an auxiliary positioning role.

[0035] In the embodiment, the rotating shaft 12 is fixedly arranged at the middle position in the first shell 1.

[0036] In the embodiment, the second shell 2 is provided with the positioning shaft 28 at the middle position, the positioning shaft 28 is arranged opposite to the lower half of the rotating shaft 12, and the bearing 6 is sleeved on the lower half of the rotating shaft 12 and the positioning shaft 28.

[0037] In the embodiment, the bearing 6 can be a ball bearing, which has simple structure and low cost, and in specific implementation, a roller bearing can also be selected.

[0038] In the embodiment, the reel 3 is provided with the winding shaft 31 on the side facing the first shell 1, which is used for winding the cable, in the use of the utility model, the cable (not shown in the figure) is wound on the winding shaft 31, the cavity in the winding shaft 31 is provided with a coiled spring (not shown in the figure), which can provide power for the cable when it is retracted, in the embodiment, the rotating shaft 12 is provided with the first hanging interface, the side wall of the winding shaft 31 is provided with the second hanging interface, one end of the coiled spring is hung on the first hanging interface, and the other end is hung on the second hanging interface, when the cable is pulled out, the reel 3 will be rotated, and the coiled spring will be elastically deformed, when the cable is retracted, the reel 3 is rotated by the coiled spring, and the cable is wound on the winding shaft 31.

[0039] In the embodiment, the structure is used in a power line or a data line, which comprises a first circuit board 4 and a second circuit board 5, the first circuit board 4 and the second circuit board 5 are connected with each other to transmit power, in the embodiment, more than one conductive spring sheet module 53 is fixedly installed on the second circuit board 5, the conductive spring sheet module 53 is provided with more than one conductive spring sheet, and a conductive ring (not shown in the figure) is arranged at a corresponding position on the first circuit board 4, the conductive ring and the conductive spring sheet abut with each other to transmit power. In the embodiment, the conductive spring sheet module 53 is provided with three groups, which can effectively ensure the reliability of power transmission, and in specific implementation, one group or two groups or more groups can also be arranged. In specific implementation, the structure of the utility model can also be used in other occasions, and the corresponding structure can also be adjusted adaptively.

[0040] In the embodiment, the first circuit board 4 is fixedly installed together with the reel 3, the cable wound on the winding shaft 31 is electrically connected with the first circuit board 4, and the second circuit board 5 is installed on the second shell 2. In the embodiment, the second shell 2 is internally and fixedly provided with a second positioning pin 26, the second circuit board 5 is provided with a second positioning hole 52, and the second positioning pin 26 is inserted into the second positioning hole 52, so that the relative fixation between the second circuit board 5 and the second shell 2 can be realized.

[0041] In the embodiment, the second shell 2 is internally and fixedly provided with a ball groove 22, the ball groove 22 is provided with a ball 23, and the ball 23 directly or indirectly abuts against the reel 3. In the conventional reel, sliding friction between the reel and the shell is generated when the reel rotates, and the friction force is relatively large. In the utility model, the sliding friction between the reel 3 and the shell is converted into rolling friction through the design of the ball 23, so that the sliding is smoother. In the embodiment, the first circuit board 4 is fixedly installed at the bottom of the reel 3, and the ball 23 abuts against the first circuit board 4. If the first circuit board 4 is not arranged at the bottom of the reel 3, the ball 23 directly abuts against the reel 3. In the embodiment, the ball groove 22 and the ball 23 are correspondingly provided with more than two groups, and the more than two groups of ball grooves 22 and balls 23 are evenly distributed along the center of the rotating shaft 12 with the center of the rotating shaft 12 as the center, so that the stress is more uniform, and the phenomenon of deflection does not occur in the rotating process. In the embodiment, the ball groove 22 and the ball 23 are correspondingly provided with three groups, and the specific number can also be arranged according to actual needs in specific implementation.

[0042] In the embodiment, the ball 23 is spherical, the ball groove 22 is cylindrical, the inner diameter of the ball groove 22 is greater than or equal to the diameter of the ball 23, and the depth of the ball groove 22 is less than the diameter of the ball 23, so that part of the ball 23 is exposed outside the ball groove 22. A through hole 51 is formed on the second circuit board 5 at a position corresponding to the ball groove 22, the ball groove 22 passes through the through hole 51, so that the ball 23 contacts the first circuit board 4, and the ball 23 can slide on the first circuit board 4.

[0043] In the embodiment, the second shell 2 is provided with a notch 24, the notch 24 can be provided with one, two, three or more according to actual needs, and part of the second circuit board 5 is exposed at the notch 24 and is used for being connected with the outside, such as being connected with a vehicle charging connector and the like, different interfaces can be replaced according to different needs.

[0044] In the embodiment, a PUSH-PUSH structure is arranged between the reel 3 and the second shell 2, the relative self-locking can be realized, the reel 3 is provided with a locking sliding groove 32, a locking clamping position 33 is arranged at a specific position in the locking sliding groove 32, the second shell 2 is provided with a locking column 27 at a corresponding position, the locking column 27 is arranged in the locking sliding groove 32, when the cable is pulled out, the locking column 27 slides in the locking sliding groove 32, when the locking column 27 is rotated to the locking clamping position 33, the locking column 27 can be clamped at the locking clamping position 33, so that the self-locking is realized, when the cable is pulled again, the locking column 27 is separated from the locking clamping position 33 and slides into the locking sliding groove 32, so that the cable can be retracted smoothly.

[0045] The utility model discloses a step structure design can reduce the contact area between the shell and the reel, and the smoothness of wire material extension and contraction is greatly improved. The utility model discloses a bearing is sleeved on the pivot in the shell, and the rotation can be more smooth.

Claims

1. A rotationally smooth extension cord, characterized by: The telescopic line comprises a shell and a reel (3), the reel (3) is installed in the shell, a rotating shaft (12) is fixedly arranged inside the shell, a first step (14) is arranged on the rotating shaft (12), the reel (3) is sleeved on the rotating shaft (12), and a second step (34) is arranged on the reel (3) and abuts against the first step (14).

2. The spin-slicked retracting cord of claim 1, wherein: The upper half of the rotating shaft (12) has a diameter greater than that of the lower half of the rotating shaft (12), the first step (14) structure is formed on the rotating shaft (12), a rotating shaft hole is formed in the reel (3), the diameter of the rotating shaft hole is greater than or equal to the diameter of the lower half of the rotating shaft (12) and less than the diameter of the upper half of the rotating shaft (12), and the rotating shaft hole is clamped at the position of the first step (14) on the rotating shaft (12).

3. A spin-slick extension cord according to claim 2, wherein: A bearing cavity (35) is arranged below the rotating shaft hole on the reel (3), a bearing (6) is installed in the bearing cavity (35), and the bearing (6) is sleeved on the lower half of the rotating shaft (12).

4. The spin-slicking retracting cord of claim 1, wherein: The shell comprises a first shell (1) and a second shell (2) which are installed together, a clamping opening (11) is formed at the edge of the first shell (1), a clamping hook (21) is fixedly arranged at the corresponding position of the second shell (2), the clamping hook (21) is clamped into the clamping opening (11), and the rotating shaft (12) is fixedly arranged at the middle position of the first shell (1).

5. A spin-slick extension cord according to claim 4, wherein: A first positioning pin (25) is fixedly arranged at the edge of the second shell (2), a first positioning hole (13) is formed at the corresponding position of the first shell (1), and the first positioning pin (25) is inserted into the first positioning hole (13).

6. The spin-slicking retractable cord of claim 4, wherein: A positioning shaft (28) is fixedly arranged at the middle position of the second shell (2) and is arranged opposite to the lower half of the rotating shaft (12).

7. The spin-slicking retractable cord of claim 4, wherein: A winding shaft (31) is fixedly arranged on one side of the reel (3) facing the first shell (1), a first hanging interface is arranged on the rotating shaft (12), a second hanging interface is arranged on the side wall of the winding shaft (31), one end of the coil spring is hung on the first hanging interface, and the other end of the coil spring is hung on the second hanging interface.

8. The spin-slicking retractable cord of claim 4, wherein: A first circuit board (4) is fixedly installed on the reel (3) and is electrically connected with the cable wound on the winding shaft (31), a second circuit board (5) is installed on the second shell (2), the first circuit board (4) and the second circuit board (5) are arranged opposite to each other, more than one conductive spring piece module (53) is fixedly installed on the second circuit board (5), more than one conductive spring piece is arranged on the conductive spring piece module (53), a conductive ring is arranged at the corresponding position of the first circuit board (4), and the conductive ring and the conductive spring piece abut against each other.

9. A spin-slick extension cord according to claim 8, wherein: A second positioning pin (26) is fixedly arranged inside the second shell (2), a second positioning hole (52) is formed in the second circuit board (5), and the second positioning pin (26) is inserted into the second positioning hole (52).

10. The spin-slicking retractable cord of claim 8, wherein: The second shell (2) is internally fixedly provided with a ball groove (22), the ball groove (22) is internally provided with a ball (23), the ball (23) directly or indirectly abuts against the reel (3), the ball groove (22) and the ball (23) are correspondingly provided with two groups or more than two groups, the two groups or more than two groups of ball grooves (22) and balls (23) are evenly distributed along the center of the rotating shaft (12) with the center of the rotating shaft (12) as the center, the ball (23) is spherical, the ball groove (22) is cylindrical, the inner diameter of the ball groove (22) is greater than or equal to the diameter of the ball (23), the depth of the ball groove (22) is less than the diameter of the ball (23), the second circuit board (5) is provided with a through hole (51) corresponding to the position of the ball groove (22), the ball groove (22) passes through the through hole (51), so that the ball (23) contacts the first circuit board (4).

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