CN110816379B

CN110816379B - Bus pull ring

Info

Publication number: CN110816379B
Application number: CN201911009728.XA
Authority: CN
Inventors: 胡星星
Original assignee: Taizhou Diguang Plastic Mould Co ltd
Current assignee: Taizhou Diguang plastic mould Co.,Ltd.
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2021-08-27
Anticipated expiration: 2039-10-23
Also published as: CN110816379A

Abstract

The invention belongs to the technical field of municipal buses, and particularly relates to a bus pull ring which comprises a hemispherical shell, a hollow ball, a sliding plate, a rotating head, a gear, a winding wheel, a volute spiral spring and the like, wherein when a passenger pulls down a handle, the handle drives a limit column to be inserted into a corresponding limit groove through the sliding plate, a pull rope, the winding wheel, a rotating shaft, the gear, a rack and a sliding strip, so that the hollow ball and the hemispherical shell are quickly limited, the pull ring does not swing randomly, and when the bus stops, starts, turns, brakes and the like, the pull ring does not swing, and the passenger can stand more stably. In addition, passengers with different heights can adjust the distance between the handle and the rectangular sleeve according to the requirements, so that the purpose of adjusting the length of the pull ring is achieved, and the purpose of relieving the fatigue of the passengers is achieved. The invention has simple structure and better use effect.

Description

Bus pull ring

Technical Field

The invention belongs to the technical field of municipal buses, and particularly relates to a bus pull ring.

Background

The bus is generally provided with a cross bar in the prior bus, a pull ring convenient for passengers to hold is hung on the cross bar, and the pull ring is tightly grasped by hands standing in a carriage to keep balance so as to avoid falling. At present, the pull ring of the bus is mainly in flexible connection by adopting a nylon belt. However, in the process of driving of the bus, when the bus stops, starts, turns, brakes suddenly and the like, due to the existence of inertia and the flexible connection of the pull ring, a passenger who stands to hold the pull ring is difficult to fall down but difficult to shake, unstable shaking causes people to be uncomfortable, and sometimes even causes some disputes and safety accidents. If the pull ring can be in a state of swinging freely when not in use and is converted into a rigid connection and cannot swing freely when in use, the use effect of the pull ring is optimized. In addition, the height of passengers in the bus is high or low, and when the pull ring is used by passengers with low height, the passengers can pull the pull ring, so that the muscles of shoulders, arms and hands can bear static load to cause fatigue when the passengers lift and grab the pull ring uncomfortably for a long time, and the passengers are easy to pull the arms or stop unstably when the passengers step on the brake. Therefore, the height of the handle should avoid stretching the arm 180 ° for a long time. A pull ring with an adjustable length will become very practical.

The invention designs a bus pull ring to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a bus pull ring which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "below", "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when using, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a bus pull ring which characterized in that: the device comprises a hemispherical shell, hollow balls, a rectangular sleeve, a handle, a sliding plate, a sliding strip, a sliding block, a pull rope, a rotating head, an adjusting ring, a spring A, a spring B, a gear, a winding wheel, a volute spring and a winding rope, wherein the hemispherical shell with a plurality of limiting grooves uniformly distributed on the inner spherical surface is provided with an installing head; the hollow ball is rotatably arranged in the hemispherical shell and can not be separated from the hemispherical shell all the time; a sliding strip with a limiting column at one end slides in the hollow ball, one end of the limiting column, which is far away from the sliding strip, slides in a column hole in the center of the top end of the hollow ball, and the limiting column is matched with the limiting groove; the sliding bar is provided with a spring B for moving and resetting; the side surface of the sliding strip is provided with a section of rack; the rotating shaft is arranged in the hollow ball in a bearing mode, and a gear and a winding wheel are fixedly arranged on the rotating shaft; the gear is meshed with the rack; the path of the sliding strip passes through the center of the hollow ball.

The rectangular sleeve is fixedly connected with the hollow ball, and the rectangular sleeve is communicated with the hollow ball; the inner side wall of the rectangular sleeve is provided with a sliding groove and a plurality of slots which are distributed at equal intervals, the sliding groove is positioned close to the hollow ball, and all the slots are positioned below the sliding groove; the sliding plate with the top side provided with the transverse groove is slidably arranged in the rectangular sleeve, the bottom of the sliding plate is provided with a rotating head, the rotating head is always positioned outside the rectangular sleeve, a vertical groove is formed in the sliding plate, the vertical groove is communicated with the transverse groove, and the vertical groove is communicated with the rotating head; a sliding block with one end provided with an inclined plane is slidably arranged in the transverse groove, and an A spring for moving and resetting the sliding block is arranged in the transverse groove; one end of the pull rope is connected with one end of the sliding block, which is far away from the inclined plane, and the other end of the pull rope penetrates out of the rotating head through the transverse groove and the vertical groove; an adjusting ring is fixedly arranged at one end of the pull rope penetrating out of the rotating head; the triangular grip with a round hole at the top is rotatably arranged on the rotating head; the sliding block is matched with the sliding groove and the slot.

One end of the rope always in a tight state is wound on the winding wheel for a plurality of circles, and the other end of the rope is connected with the top end of the sliding plate; one end of the volute spiral spring is connected with the rotating shaft, and the other end of the volute spiral spring is connected with the inner wall of the hollow ball.

As a further improvement of the present technology, the outer diameter of the winding wheel is larger than the outer diameter of the gear. The design is that the winding wheel releases a long pull rope to enable the gear to rotate for one circle so as to ensure that when the winding wheel releases a complete circle of pull rope, the distance between one end of the sliding plate, provided with the rotating head, in the rectangular sleeve and the rectangular sleeve is approximately one third to one half of the total length of the sliding plate.

As a further improvement of the technology, a fixing plate with a ladder-shaped guide groove at one side is fixedly arranged on the inner wall of the hollow ball; the side surface of the sliding strip, which is far away from the rack, is provided with a trapezoidal guide block; the ladder-shaped guide block is slidably arranged in the ladder-shaped guide groove; an L-shaped plate is fixedly arranged on the lower surface of the fixing plate; one end of the spring B is connected with one end, far away from the limiting column, of the sliding strip, and the other end of the spring B is connected with the L-shaped plate. The effect of trapezoidal guide slot and trapezoidal guide block can also prevent that the slide bar breaks away from when satisfying the steady motion of slide bar.

As a further improvement of the technology, a limit block is fixedly arranged on the inner wall of the rectangular sleeve, which is close to the hollow ball; the sliding plate is matched with the limiting block; the spiral spring is always in a compressed state.

As a further improvement of the technology, a U-shaped block is fixedly arranged at one end of the transverse groove in the sliding plate, which is far away from the notch; the spring A is arranged between the sliding block and the U-shaped block.

As a further improvement of the technology, an A fixed pulley is arranged at one end of the transverse groove in the sliding plate, which is far away from the notch, and the U-shaped block is positioned between the A fixed pulley and the sliding block; the fixed pulley B installed in the vertical groove is positioned at the connecting part of the transverse groove and the vertical groove; the pull rope is positioned in the spring A and penetrates through the U-shaped block and then enters the vertical groove through the guide of the fixed pulley A and the fixed pulley B.

As a further improvement of the technology, the connecting ends of two adjacent slots are processed by sharp corners.

As a further improvement of the technology, all the surfaces of the slider are smoothed.

As a further improvement of the technology, one end of the limiting column, which is far away from the sliding strip, is processed by a fillet.

The shell size of the hemispherical shell of the invention is to ensure that the hollow ball cannot be pulled out of the hemispherical shell.

Compared with the traditional bus pull ring technology, the invention has the beneficial effects that:

1. passengers with different heights can adjust the distance between the handle and the rectangular sleeve according to the requirements, thereby achieving the purpose of adjusting the length of the pull ring; the adjustment of the passengers with different heights belongs to the length of the pull ring suitable for the passengers, so that the situation that the arms are stretched by 180 degrees for a long time can be effectively avoided, and the fatigue of the passengers is greatly relieved.

2. When a passenger does not use the pull ring, the limiting column is not inserted into any limiting groove, so the hollow ball can freely swing in the hemispherical shell, and particularly when the passenger walks in a bus and touches the pull ring, the pull ring can freely swing, so that the pull ring does not cause great collision injury to the passenger, and the aim of avoiding hurting people when the traditional pull ring is used is fulfilled. When a passenger uses the pull ring disclosed by the invention, the limiting column disclosed by the invention can be inserted into the corresponding limiting groove, so that the hollow ball and the hemispherical shell are quickly limited, and the pull ring disclosed by the invention is equivalently fixedly connected with a cross bar on a bus, so that the pull ring disclosed by the invention cannot shake when the bus stops, starts, turns, brakes suddenly and the like, the passenger can stand more stably, the limb conflict with other people caused by the large shaking of the body of the passenger is avoided, and the safety problem is reduced.

3. After the use of the pull ring is finished by passengers, the pull ring can be automatically reset to the initial state without manual reset, and the use convenience is greatly improved. The invention has simple structure and better practical effect.

Drawings

Figure 1 is a schematic view of a pull ring in its entirety and in perspective.

Figure 2 is a front schematic view of the pull ring in two cross sections.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a sectional view of the slider and a sectional view of the slide plate.

FIG. 5 is a schematic view of the spring mounting and the structure of the grip.

Fig. 6 is a schematic sectional view of a hollow sphere and a schematic sectional view of a hemispherical shell.

Fig. 7 is a schematic sectional view of the internal structure of the hollow sphere.

Fig. 8 is a schematic view of the installation of the cord.

FIG. 9 is a schematic view of the mounting of the wrap spring and the mounting of the rack.

Number designation in the figures: 1. a mounting head; 2. a hemispherical shell; 3. hollow spheres; 4. a rectangular sleeve; 5. a grip; 6. a slide plate; 7. a fixing plate; 8. a slide bar; 9. a slider; 10. a sliding groove; 12. a slot; 14. pulling a rope; 15. rotating the head; 16. an adjusting ring; 17. a, a spring; 18. a transverse groove; 19. a U-shaped block; 20. a limiting block; 21. a, a fixed pulley; 22. b, fixing a pulley; 24. a vertical slot; 25. a limiting groove; 26. a limiting column; 27. a ladder-shaped guide groove; 28. a ladder-shaped guide block; 29. an L-shaped plate; 30. a spring B; 31. a rack; 32. a gear; 33. a winding wheel; 34. a rotating shaft; 35. a volute spiral spring; 36. rope winding; 37. and (4) column holes.

Detailed Description

The invention will be described with reference to the accompanying drawings, which are only schematic in terms of their structural proportions and which may be specified according to actual requirements; it should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

A bus pull ring comprises a hemispherical shell 2, a hollow ball 3, a rectangular sleeve 4, a handle 5, a sliding plate 6, a sliding strip 8, a sliding block 9, a pull rope 14, a rotating head 15, an adjusting ring 16, an A spring 17, a B spring 30, a gear 32, a winding wheel 33, a volute spring 35 and a winding rope 36, wherein an installation head 1 is arranged on the hemispherical shell 2, the inner spherical surface of which is uniformly provided with a plurality of limiting grooves 25; as shown in fig. 1 and 2, the hollow ball 3 is rotatably mounted in the hemispherical shell 2, and the hollow ball 3 cannot be separated from the hemispherical shell 2 all the time; as shown in fig. 7 and 9, the sliding bar 8 with the limiting column 26 at one end slides in the hollow sphere 3, one end of the limiting column 26 far away from the sliding bar 8 slides in the column hole 37 at the center of the top end of the hollow sphere 3, and the limiting column 26 is matched with the limiting groove 25; the sliding bar 8 is provided with a B spring 30 for moving and resetting; the side surface of the sliding strip 8 is provided with a section of rack 31; the rotating shaft 34 is arranged in the hollow ball 3 in a bearing mode, and the gear 32 and the winding wheel 33 are fixedly arranged on the rotating shaft 34; the gear 32 is meshed with the rack 31; the path of movement of the slide bar 8 passes through the centre of the hollow sphere 3.

As shown in fig. 6, the rectangular sleeve 4 is fixedly connected with the hollow sphere 3, and the rectangular sleeve 4 is communicated with the hollow sphere 3; the inner side wall of the rectangular sleeve 4 is provided with a sliding groove 10 and a plurality of slots 12 which are distributed at equal intervals, the sliding groove 10 is positioned close to the hollow ball 3, and all the slots 12 are positioned below the sliding groove 10; as shown in fig. 3 and 4, the sliding plate 6 with the top side surface opened with the transverse groove 18 is slidably installed in the rectangular sleeve 4, the bottom of the sliding plate 6 is provided with the rotating head 15, the rotating head 15 is always positioned outside the rectangular sleeve 4, the sliding plate 6 is internally opened with the vertical groove 24, the vertical groove 24 is communicated with the transverse groove 18, and the vertical groove 24 is communicated with the rotating head 15; as shown in fig. 4 and 5, the slider 9 with one end having an inclined surface is slidably mounted in the transverse groove 18, and the a spring 17 for moving and returning the slider 9 is mounted in the transverse groove 18; as shown in fig. 3, one end of the pulling rope 14 is connected with one end of the sliding block 9 far away from the inclined plane, and the other end passes through the rotating head 15 through the transverse groove 18 and the vertical groove 24; an adjusting ring 16 is fixedly arranged at one end of the pull rope 14 penetrating through the rotating head 15; as shown in fig. 4 and 5, the triangular handle 5 with a circular top is rotatably mounted on the rotating head 15; the slider 9 is fitted with the slide groove 10 and the insertion groove 12.

As shown in fig. 8, one end of the rope 36, which is always in a tight state, is wound on the winding wheel 33 for a plurality of turns, and the other end is connected with the top end of the sliding plate 6; as shown in fig. 8 and 9, one end of the spiral spring 35 is connected to the rotating shaft 34, and the other end is connected to the inner wall of the hollow ball 3.

As shown in fig. 9, the outer diameter of the winding wheel 33 is larger than that of the gear 32. The design is such that when the winding wheel 33 releases the long pull cord 14 to allow the gear 32 to rotate one turn to ensure that the winding wheel 33 releases the complete pull cord 14, the end of the sliding plate 6 with the rotating head 15 sliding in the rectangular sleeve 4 is between about one third and one half of the total length of the sliding plate 6 from the rectangular sleeve 4.

As shown in fig. 7 and 9, a fixing plate 7 having a ladder-shaped guide groove 27 at one side is fixedly mounted on the inner wall of the hollow sphere 3; the side of the sliding bar 8 facing away from the toothed rack 31 has a trapezoidal guide block 28; the ladder guide block 28 is slidably mounted in the ladder guide groove 27; an L-shaped plate 29 is fixedly arranged on the lower surface of the fixing plate 7; one end of the spring B30 is connected with one end of the sliding strip 8 far away from the limiting column 26, and the other end is connected with the L-shaped plate 29. The ladder guide groove 27 and the ladder guide block 28 function to prevent the slide bar 8 from being detached while the slide bar 8 is smoothly moved.

As shown in fig. 3 and 8, a limiting block 20 is fixedly arranged on the inner wall of the rectangular sleeve 4 close to the hollow ball 3; the sliding plate 6 is matched with the limiting block 20; the spiral spring 35 is always in a compressed state.

As shown in fig. 4 and 5, a U-shaped block 19 is fixedly arranged at one end of the transverse groove 18 of the sliding plate 6 far away from the notch; the a spring 17 is installed between the slider 9 and the U-shaped block 19.

As shown in fig. 3, an a fixed pulley 21 is arranged at one end of the transverse groove 18 in the sliding plate 6 far away from the notch, and the U-shaped block 19 is positioned between the a fixed pulley 21 and the sliding block 9; the B fixed pulley 22 installed in the vertical groove 24 is positioned at the joint of the transverse groove 18 and the vertical groove 24; the pull cord 14 is located in the A spring 17 and the pull cord 14 passes through the U-shaped block 19 and is guided by the A fixed pulley 21 and the B fixed pulley 22 into the vertical slot 24.

As shown in fig. 6, the connecting ends of two adjacent slots 12 are pointed.

All the surfaces of the slider 9 are smoothed.

The end of the limiting column 26 far away from the sliding strip 8 is processed by rounding.

The shell size of the hemispherical shell 2 is required to ensure that the hollow ball 3 cannot be pulled out of the hemispherical shell 2.

In the invention, the sliding block 9 is subjected to smoothing treatment, so that the sliding block 9 and the lower end surface of the sliding groove 10 have small friction when the sliding block 9 is pulled out from the sliding groove 10, and the normal operation of the invention is satisfied. The inner shell surface of the hemispherical shell 2 is subjected to smoothing treatment, so that the top end of the limiting column 26 can be smoothly matched with the inner shell surface of the hemispherical shell 2 in a sliding manner, and the normal operation of the invention is met.

The scroll spring 35 of the present invention is in a pre-compressed state in an initial state in that: when the passenger pulls only the grip 5 with a small force during normal and smooth driving or parking of the bus, the small pulling force is applied to the grip 5, and the scroll spring 35 is required to be pre-compressed in the initial state in order that the grip 5 will not pull the winding rope 36 to be released from the winding wheel 33 through the rotating head 15 and the sliding plate 6.

All sealing modes in the invention adopt the prior art. The rotary head 15 of the present invention is composed of a cylindrical body having two rings and a grip 5 disposed between the two rings of the rotary head 15 at the top end thereof, so that the grip 5 is prevented from being separated from the rotary head 15 and the grip 5 can be rotated with respect to the rotary head 15. The design benefit of the rotating head 15 is that after the passenger holds the grip 5, the grip 5 can be rotated arbitrarily according to actual requirements, so that the use experience of the passenger is more perfect. The mounting head 1 of the invention is fixedly arranged on a fixed cross bar on a bus.

The pull ring of the invention requires that in an initial vertical state, the top end of the limit column 26 is positioned in the column hole 37, the top end of the limit column 26 does not penetrate through the outer spherical surface of the hollow ball 3, and the top end of the limit column 26 is just aligned with one limit groove 25 on the hemispherical shell 2. The design is that when the bus is started suddenly, passengers who have not had time to grasp the pull ring or do not grasp the pull ring can quickly grasp the pull ring and pull down; after the passenger quickly grasps the pull ring and pulls down the handle 5 in the invention, the pull-down of the handle 5 quickly penetrates the limit column 26 out of the hollow ball 3 and is inserted into the aligned limit groove 25 after a series of transmission, so that the hollow ball 3 and the hemispherical shell 2 are quickly limited, and the pull ring is prevented from swinging when the bus is suddenly started; in addition, when the passenger is conscious to rapidly grasp the pull ring, the action of the passenger consciously grasping the pull ring can lead the pull ring to swing with a certain small amplitude, and the limit column 26 can not be inserted into the limit groove 25 aligned in the initial vertical state, but the hollow ball 3 can be easily aligned with other limit grooves 25 by using the limit column 26 in the process of the swing with a certain small amplitude of the hemispherical shell 2, and the limit column 26 can also be rapidly inserted into other limit grooves 25 to rapidly limit the hollow ball 3 and the hemispherical shell 2.

The embodiment of the invention comprises the following steps: in the initial state, the spring A17 is in a natural state, the inclined end of the sliding block 9 penetrates out of the transverse groove 18, and the inclined end of the sliding block 9 is positioned at the upper part of the sliding groove 10; the top end of the sliding plate 6 is attached to the limiting block 20, the volute spiral spring 35 is in a pre-compression state, and the winding rope 36 is in a tightening state; the gear 32 is engaged with teeth at the top end of the rack 31, the top end of the limiting column 26 is positioned in the column hole 37, and the top end of the limiting column 26 does not penetrate out of the outer spherical surface of the hollow sphere 3. When the passenger does not use the handle 5, the pull ring can be in a random swinging state, so that after the passenger collides with the pull ring, the pull ring can swing under the action of external force, and the collision injury to the passenger caused by the fact that the pull ring cannot swing is prevented. When the pull ring of the invention is in a vertical state, the top end of the limiting column 26 is just aligned with one limiting groove 25 on the hemispherical shell 2.

When the passenger uses the pull ring of the present invention and holds the grip 5 with his/her hand, the passenger can manually swing the pull ring of the present invention to a desired comfortable angle. Then, the passenger needs to change the pull ring with the comfortable angle into rigid, so as to prevent the passenger from trouble caused by the sudden change of the bus speed when the passenger pulls the pull ring of the invention to swing due to inertia or conflict with other people's limbs. The pull ring is changed into rigid, which is equivalent to a pull ring which is held by a hand of a passenger and is rigidly connected with a fixed cross bar on a bus; the pull ring of rigid connection can not swing for the fixed horizontal pole on the bus at the bus speed sudden change, has guaranteed rigid connection's pull ring stability to the passenger. The process of converting the pull ring into the rigid connection pull ring comprises the following steps: when using the conventional pull ring, the passenger pulls the conventional pull ring to keep the body as balanced as possible, so the passenger can pull the grip 5 of the present invention like the conventional pull ring; the handle 5 pulls the sliding plate 6 to slide downwards in the rectangular sleeve 4 through the rotating head 15, the sliding plate 6 pulls the winding rope 36 to release the pull rope 14 from the winding wheel 33, the winding wheel 33 drives the sliding strip 8 to move upwards along the trapezoidal guide groove 27 through the rotating shaft 34, the gear 32 and the rack 31, the spiral spring 35 is further compressed, and the B spring 30 is stretched; the sliding strip 8 drives the limit column 26 to penetrate out of the hollow ball 3 and be inserted into the corresponding limit groove 25. In the process that the sliding plate 6 moves downwards, the sliding block 9 moves along with the sliding plate 6; when the sliding block 9 is attached to the lower end surface of the sliding groove 10, the sliding plate 6 cannot be pulled by the handle 5 to move downwards due to the limitation of the sliding block 9, at this time, the limiting posts 26 are located in the corresponding limiting grooves 25, the limiting posts 26 are not inserted into the tops of the corresponding limiting grooves 25, and the gear 32 is engaged with the teeth at the tail ends of the racks 31. When a passenger swings the pull ring, the limit column 26 may not be aligned with the corresponding limit groove 25 due to the swing angle of the pull ring, so that when the passenger pulls the handle 5 by hand, the limit column 26 cannot be inserted into the corresponding limit groove 25 but is pressed against the inner shell surface of the hemispherical shell 2 after a series of transmission, and the position of the sliding plate 6 is basically maintained at the initial state position; at this time, the passenger only needs to swing the pull ring of the present invention by a small amplitude, so that the position-limiting columns 26 can be aligned with the corresponding position-limiting grooves 25, and then the handle 5 in the pulled state can be quickly inserted into the corresponding position-limiting grooves 25 through a series of transmission. After the limiting columns 26 are quickly inserted into the corresponding limiting grooves 25, the hollow ball 3 and the hemispherical shell 2 are relatively static, that is, the pull ring of the invention cannot swing around the center of the hemispherical shell 2, and the pull ring of the invention is equivalently changed into rigid connection.

When the pull ring of the invention is adjusted to reach the angle which is comfortable for passengers with insufficient height, the pull ring of the invention can be adjusted to be long in order to make the passengers more comfortable to hold the pull ring of the invention, and the specific operation is as follows: when the handle 5 is held, the adjusting ring 16 is pulled by fingers, so that the pull rope 14 pulls the sliding block 9 to move towards the direction of the U-shaped block 19 until the sliding block completely enters the transverse groove 18, and the A spring 17 is compressed; since the slide 9 is completely inserted into the transverse groove 18, the slide 9 no longer limits the downward movement of the slide 6; at this time, the state of pulling the adjusting ring 16 is maintained, then the handle 5 is pulled down, the handle 5 drives the sliding plate 6 to move downwards in the rectangular sleeve 4 through the rotating head 15, the sliding plate 6 continues to pull the winding rope 36 to release the pull rope 14 from the winding wheel 33, and the winding wheel 33 continues to drive the gear 32 to rotate through the rotating shaft 34; since the gear 32 is engaged with the end teeth of the rack 31 and the position-limiting post 26 is not inserted into the top of the corresponding position-limiting groove 25 in the previous operation, the gear 32 is continuously rotated to drive the rack 31 to move upwards, but to drive the rack 31 to perform a reciprocating movement with a small amplitude, that is, the rack 31 is maintained at the position of the existing state, and the position-limiting post 26 performs a reciprocating movement with a small amplitude in the corresponding position-limiting groove 25. When the distance between the handle 5 and the rectangular sleeve 4 is adjusted properly, the position of the handle 5 is maintained and the adjusting ring 16 is released, so that under the reset action of the A spring 17, the inclined end of the slider 9 passes through the transverse groove 18 and is re-inserted into the inserting groove 12 at the corresponding position, and the adjusting ring 16 is reset. When the inclined end of the slide block 9 is not aligned with the slot 12 at the corresponding position, the inclined end of the slide block 9 is in press fit with the sharp corner between two adjacent slots 12, the inclined end of the slide block 9 is certainly inserted into one slot 12 under the guidance of the sharp corner, the slide block 9 drives the slide plate 6 to move up or down in the rectangular sleeve 4 in a smaller range in the process, the slide block 9 and the slide plate 6 moving down in the smaller range cannot influence the position of the limit column 26 in the corresponding limit slot 25, and after a series of transmission, the slide block 9 and the slide plate 6 moving up in the smaller range can drive the limit column 26 to move down for a small distance by using the slide bar 8, and at the moment, the limit column 26 cannot be separated from the corresponding limit slot 25, so that the hemispherical shell 2 and the hollow sphere 3 are still relatively static. After the sliding blocks 9 are inserted into the corresponding slots 12, the position of the sliding plate 6 in the rectangular sleeve 4 is relatively fixed, and the distance between the grip 5 and the rectangular sleeve 4 is maintained, so that the length adjustment of the pull ring is finished.

When the passenger does not use the pull ring of the invention, under the reset action of the spiral spring 35, the rotating shaft 34 drives the gear 32 and the winding wheel 33 to reset and rotate; the winding wheel 33 is rewound by the released winding rope 36, the winding rope 36 pulls the sliding plate 6 to move and reset to the initial position, during the moving and resetting process of the sliding plate 6, the sliding block 9 moves along with the sliding plate 6, the inclined plane end of the sliding block 9 is in press fit with the slot 12, under the action of the inclined plane of the sliding block 9, the sliding block 9 can smoothly cross the slot 12, during the reciprocating sliding of the sliding block 9 in the transverse slot 18, and the A spring 17 is compressed and reset in a reciprocating mode. The rotating shaft 34 drives the sliding bar 8 and the limiting column 26 to separate from the corresponding limiting groove 25 through the gear 32 and the rack 31; the rack 31 is driven to move downwards to the limit position by the gear 32 which rotates for a plurality of circles again until the gear 32 continuously stirs the top teeth of the rack 31, and the position of the rack 31 is basically kept unchanged. For the B spring 30, the B spring 30 plays a role of assisting the return during the return movement of the slide bar 8. In addition, the B spring 30 can ensure that the top teeth or the end teeth of the rack 31 can maintain the meshed state with the gear 32.

While the present invention has been described in conjunction with the above embodiments, the present invention is not limited to the above embodiments but is limited only by the appended claims, and those skilled in the art can easily make modifications and variations thereto without departing from the true spirit and scope of the present invention.

Claims

1. The utility model provides a bus pull ring which characterized in that: the device comprises a hemispherical shell, hollow balls, a rectangular sleeve, a handle, a sliding plate, a sliding strip, a sliding block, a pull rope, a rotating head, an adjusting ring, a spring A, a spring B, a gear, a winding wheel, a volute spring and a winding rope, wherein the hemispherical shell with a plurality of limiting grooves uniformly distributed on the inner spherical surface is provided with an installing head; the hollow ball is rotatably arranged in the hemispherical shell and can not be separated from the hemispherical shell all the time; a sliding strip with a limiting column at one end slides in the hollow ball, one end of the limiting column, which is far away from the sliding strip, slides in a column hole in the center of the top end of the hollow ball, and the limiting column is matched with the limiting groove; the sliding bar is provided with a spring B for moving and resetting; the side surface of the sliding strip is provided with a section of rack; the rotating shaft is arranged in the hollow ball in a bearing mode, and a gear and a winding wheel are fixedly arranged on the rotating shaft; the gear is meshed with the rack; the path of the sliding strip passing through the center of the hollow ball;

the rectangular sleeve is fixedly connected with the hollow ball, and the rectangular sleeve is communicated with the hollow ball; the inner side wall of the rectangular sleeve is provided with a sliding groove and a plurality of slots which are distributed at equal intervals, the sliding groove is positioned close to the hollow ball, and all the slots are positioned below the sliding groove; the sliding plate with the top side provided with the transverse groove is slidably arranged in the rectangular sleeve, the bottom of the sliding plate is provided with a rotating head, the rotating head is always positioned outside the rectangular sleeve, a vertical groove is formed in the sliding plate, the vertical groove is communicated with the transverse groove, and the vertical groove is communicated with the rotating head; a sliding block with one end provided with an inclined plane is slidably arranged in the transverse groove, and an A spring for moving and resetting the sliding block is arranged in the transverse groove; one end of the pull rope is connected with one end of the sliding block, which is far away from the inclined plane, and the other end of the pull rope penetrates out of the rotating head through the transverse groove and the vertical groove; an adjusting ring is fixedly arranged at one end of the pull rope penetrating out of the rotating head; the triangular grip with a round hole at the top is rotatably arranged on the rotating head; the sliding block is matched with the sliding groove and the slot;

one end of the rope always in a tight state is wound on the winding wheel for a plurality of circles, and the other end of the rope is connected with the top end of the sliding plate; one end of the volute spiral spring is connected with the rotating shaft, and the other end of the volute spiral spring is connected with the inner wall of the hollow ball;

a fixing plate with a ladder-shaped guide groove at one side is fixedly arranged on the inner wall of the hollow ball; the side surface of the sliding strip, which is far away from the rack, is provided with a trapezoidal guide block; the ladder-shaped guide block is slidably arranged in the ladder-shaped guide groove; an L-shaped plate is fixedly arranged on the lower surface of the fixing plate; one end of the spring B is connected with one end of the sliding strip, which is far away from the limiting column, and the other end of the spring B is connected with the L-shaped plate;

a U-shaped block is fixedly arranged at one end of the transverse groove in the sliding plate, which is far away from the notch; the spring A is arranged between the sliding block and the U-shaped block;

the end of the transverse groove in the sliding plate, which is far away from the notch, is provided with a fixed pulley A, and the U-shaped block is positioned between the fixed pulley A and the sliding block; the fixed pulley B installed in the vertical groove is positioned at the connecting part of the transverse groove and the vertical groove; the pull rope is positioned in the spring A and penetrates through the U-shaped block and then enters the vertical groove through the guide of the fixed pulley A and the fixed pulley B.

2. A bus tab according to claim 1, characterized in that: the outer diameter of the winding wheel is larger than that of the gear.

3. A bus tab according to claim 1, characterized in that: the inner wall of the rectangular sleeve, which is close to the hollow ball, is fixedly provided with a limiting block; the sliding plate is matched with the limiting block; the spiral spring is always in a compressed state.

4. A bus tab according to claim 1, characterized in that: the connecting ends of two adjacent slots are processed by sharp corners.

5. A bus tab according to claim 1, characterized in that: all surfaces of the slider are smoothed.

6. A bus tab according to claim 1, characterized in that: the end, far away from the sliding strip, of the limiting column is processed by a fillet.