WO2020259373A1

WO2020259373A1 - Self-locking draw bar and trolley case

Info

Publication number: WO2020259373A1
Application number: PCT/CN2020/096650
Authority: WO
Inventors: 曾冰
Original assignee: 曾冰
Priority date: 2019-06-26
Filing date: 2020-06-17
Publication date: 2020-12-30
Also published as: CN110200385A; CN210988696U; CN110934404A

Abstract

The present invention relates to a self-locking draw bar and a trolley case. The self-locking draw bar comprises an outer tube, an inner tube arranged in the outer tube in a sleeved manner, and stop fasteners rotatably mounted at a bottom end of the inner tube, wherein a side face of the outer tube is provided with several outer tube stop fastener lock holes corresponding to the positions of the stop fasteners. When the stop fasteners are located at the outer tube stop fastener lock holes, by means of the different changes in the angle of the draw bar or the change in the drawing speed of the inner tube, the stop fasteners can rotate by their own gravity, and are fastened in the outer tube stop fastener lock holes or are released from the outer tube stop fastener lock holes. The draw bar can be self-locked by means of the stop fasteners cooperating with the outer tube and the inner tube without the need for various components, such as a button, a spring, a sliding block, a pressure bar and a pressure foot, used in a traditional draw bar, such that the structure is simple, the weight of the draw bar is reduced, the manufacturing cost is reduced, the production process is simplified, the overall design of the draw bar is enhanced, and the use is convenient for a user.

Description

Self-locking pull rod and pull rod box

Technical field

The invention relates to the technical field of luggage and bags, and more specifically, to a self-locking pull rod and a pull rod box.

Background technique

At present, the pull rod mechanism of the trolley box is a combination of inner and outer pipes. The button at the top controls the lower slider. The spring is used to eject the slider from the hole on the pipe wall, and the outer pipe is stuck. Press the button again, and the slider shrinks. The tube can be drawn and slid freely, and the entire tie rod structure has many parts, and the structure and production process are complicated.

technical problem

A self-locking rod and rod box are provided, which have a simple structure and do not require many components such as buttons, springs, and sliders of traditional rods, thereby reducing manufacturing costs and simplifying production processes.

Technical solutions

The present invention provides a self-locking pull rod, comprising an outer tube, an inner tube sleeved in the outer tube, and a stop buckle rotatably installed at the bottom end of the inner tube. The side of the outer tube is provided with a plurality of The outer tube stop buckle lock hole corresponding to the stop buckle position, when the stop buckle is located at the outer tube stop buckle lock hole, through the change of different angles of the pull rod, the stop buckle uses its own gravity to rotate and It is buckled in the locking hole of the outer tube or released from the locking hole of the outer tube.

In the self-locking pull rod of the present invention, the upper end of the stop buckle is provided with a through hole, and the stop buckle is installed at the bottom of the inner tube by a fixing member or a pin passing through the through hole.

In the self-locking pull rod of the present invention, the fixing member includes buckle portions on both sides and a convex point in the middle, and a structural member mounting hole is provided on the side wall of the inner tube, and the buckle portion is On the outer wall of the inner tube, the convex point passes through the structural member installation hole and the through hole to fix the stop buckle on the inner tube.

In the self-locking pull rod of the present invention, the pull rod further includes a structural member, the structural member includes a structural member body located at the lower part and a connecting part located at the upper part; the connecting part is fixedly installed on the inner tube At the bottom, the main body of the structural member is a hollow structure with a stop position on the same side as the lock hole of the outer tube stop buckle, and the stop buckle is installed in the structural member body through a mounting shaft passing through the through hole , So that it can swing left and right in the space of the main body of the structural member and protrude from the stop position.

In the self-locking pull rod of the present invention, the stop buckle includes a fixing portion located at the upper part and provided with a through hole, and a hook-shaped protrusion located at the lower part and provided on the same side as the lock hole of the outer tube stop buckle When the pull rod is vertical, the stop buckle is in the outer tube without external force. At this time, the inner tube can move up and down freely; when the pull rod is inclined, The stop buckle is rotated by gravity, and the raised portion moves outward and falls into the stop buckle lock hole of the outer tube. At this time, the inner tube cannot move down because the raised portion is stuck on the lower edge of the stop buckle lock hole of the outer tube. The inner tube can only be pulled upwards.

In the self-locking pull rod of the present invention, a trigger portion is provided on the side of the securing portion of the stop buckle away from the lock hole of the outer tube stop buckle, and the outer tube is provided with Part is set on the same side of the trigger part and can touch the protruding touch point of the trigger part; when the inner tube is pulled up, the touch point will touch the trigger part, and the trigger part applies to the trigger part The lower force causes the anti-retract buckle to rotate, and causes the protrusion to tilt and slide into the anti-retract buckle lock hole of the outer tube.

In the self-locking pull rod of the present invention, the trigger part is made of flexible material. When the inner tube goes down, the trigger part can move down from the contact point through deformation. The buckle rotates in a reverse direction to make the convex part away from the outer tube stop buckle lock hole.

In the self-locking pull rod of the present invention, the fixing member and the main body of the structural member are integrally injection molded.

In the self-locking pull rod of the present invention, the stop buckle is located outside the inner tube, or partly accommodated in the inner tube, or completely embedded in the inner tube, when the stop buckle is completely embedded in the inner tube When the inner tube is used, a side of the inner tube corresponding to the lock hole of the outer tube stopper is provided with an inner tube avoiding groove that facilitates the stopper to extend from the inner tube.

In the self-locking pull rod of the present invention, the stop buckle includes a fixing part located at the upper part and provided with a through hole, and a locking part located at the lower part, and the locking part is close to the lock hole of the outer tube stop buckle. One end is a lock rod, and the other end cooperates with the lock rod to form a hook shape that can buckle the lower edge of the lock hole of the outer tube, and the other end of the lock part is heavier than the end of the lock rod. When no external force is applied, the lock rod is always in a horizontal state. When the pull rod is vertical, the lock rod of the stop buckle can protrude from the stop buckle lock hole of the outer tube. At this time, the inner tube is locked due to the locking part. The lower edge of the outer tube stop buckle lock hole cannot move down, so that the inner tube can only be pulled upward; when the pull rod is inclined, the stop buckle is rotated by gravity, so that the lock rod can be removed from the outer tube stop lock lock hole When retracted, the inner tube can be pulled freely; when the pull rod is not tilted, the inner tube is slightly pulled up, and when the locking portion is retracted into the outer tube, it will rotate faster than the stop buckle by gravity When the inner tube is pressed down at a speed of, the stop buckle can smoothly pass through the stop buckle lock hole of the outer tube.

In the self-locking pull rod of the present invention, both the left and right sides of the outer tube are provided with outer tube stop buckle locking holes, and the left and right sides of the protrusion are provided with diagonally downward locking teeth. The locking teeth are set symmetrically.

In the self-locking pull rod according to the present invention, it further includes a lock and a structural member for installing the stop buckle and the lock, the structural member is installed at the bottom of the inner tube, and the outer The tube is provided with a bumping point extending in the direction of the inner tube, the bumping point is arranged corresponding to the locking hole of the outer tube, the structural member is provided with a stop, and the securing buckle is provided with The contact portion and the clamping portion, the weight of the contact portion is heavier than the weight of the clamping portion, the contact portion and the clamping portion are both installed in the structural member, and the clamping portion is clamped with the stop , The locking portion can extend out of the stop position to be clamped with the outer tube stop buckle lock hole; when the inner tube is pulled up vertically, the stop position rises to the outer tube stop buckle lock hole At this time, since the weight of the contact part is heavier than the weight of the clip part, the catch stopper rotates so that the catch part can extend out of the stop position to be engaged with the catch catch lock hole of the outer tube.

In the self-locking pull rod of the present invention, a sheath is provided between the outer tube and the inner tube, the sheath is located inside the top end of the outer tube, and the lock catch is installed on the stopper. Above the buckle, the buckle includes a limiting hole and a hook portion, the hook portion can extend out of the structural member to contact the cover, the hook portion is located above the contact portion, and the structure A first limiting portion and a second limiting portion that can be connected to the limiting hole are provided on the component; when the inner tube is continuously pulled upward, the hook will touch the sheath The bottom of the cover, and due to the pressure of the sleeve, the contact part is rotated downward to hook the contact part, the limit hole also changes from being engaged with the first limit part to being engaged with the second limit part When the inner tube is vertically pressed down, the hook part contacts the touch point, and is separated from the touch part due to the resistance of the touch point, and the limit hole is also from the The clamping connection of the second limiting portion is changed back to the clamping connection with the first limiting portion.

The present invention also provides a pull rod box, which includes any one of the above-mentioned self-locking pull rods.

Beneficial effect

The self-locking of the tie rod is completed through the cooperation of the stop buckle with the outer tube and the inner tube. There is no need for traditional tie rod buttons, springs, sliders, pressure rods, pressers and other components. The structure is simple, the weight of the tie rod is reduced, and the manufacturing is reduced. Cost and simplification of the production process, enhance the overall design sense of the appearance of the tie rod, convenient for users to use.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

Fig. 1 is a schematic diagram of the structure of the stop buckle of the self-locking pull rod of the present invention;

Figure 2 is a schematic structural view of the fixing member of the self-locking pull rod of the present invention;

Figure 3 is a schematic diagram of the self-locking pull rod of the first embodiment of the present invention fixing the anti-retract buckle on the inner tube using a fixing member;

4 is a schematic diagram of the structure of the outer tube of the self-locking pull rod of the present invention;

Figure 5 is an assembly perspective view of the first embodiment of the self-locking pull rod of the present invention;

6 is a schematic diagram of the self-locking pull rod of the first embodiment of the present invention when the pull rod is inclined;

FIG. 7 is a schematic diagram of the structure of the second embodiment of the self-locking pull rod of the present invention;

Figure 8 is an internal perspective view of a structural member of the second embodiment of the self-locking pull rod of the present invention;

Figure 9 is an assembly perspective view of the second embodiment of the self-locking pull rod of the present invention;

10 is a schematic diagram of the second embodiment of the self-locking pull rod of the present invention when the pull rod is inclined;

Figure 11 is a schematic structural view of the second embodiment in which the fixing part and the structural part are integrally formed;

12 is a schematic diagram of the structure of the stop buckle in Embodiment 3 of the self-locking pull rod of the present invention;

Figure 13 is an internal perspective view of the stop catch buckle of Figure 12 installed in a structural member;

Fig. 14 is a schematic diagram from another angle of Fig. 13;

Figure 15 is an assembly perspective view of the third embodiment of the self-locking pull rod of the present invention;

16 is a schematic diagram of the third embodiment of the self-locking pull rod of the present invention when the pull rod is inclined;

17 is a schematic diagram of the self-locking pull rod of the embodiment of the present invention when the four pull rods can be pulled vertically;

18 is a schematic diagram of the embodiment of the self-locking pull rod of the present invention when the four pull rods are locked vertically;

19 is a schematic diagram of the self-locking pull rod embodiment four of the present invention when the pull rod is inclined and can be pulled;

20 is a schematic diagram of Embodiment 5 of the self-locking pull rod of the present invention when the pull rod is vertically movable;

21 is a schematic diagram of the fifth embodiment of the self-locking pull rod of the present invention when the pull rod is locked vertically;

22 is a schematic diagram of the self-locking pull rod of the fifth embodiment of the present invention when the pull rod is vertical when the lock catch hooks and pulls the stop catch;

23 is a schematic diagram of the self-locking pull rod of the fifth embodiment of the present invention when the pull rod vertically pulls down the pull rod to unlock the lock.

Embodiments of the invention

Example one

Figures 1 to 6 show a self-locking rod provided by the first embodiment of the present invention, which includes an outer tube 1 and an inner tube 2 sleeved in the outer tube 1. The outer tube 1 is fixed, the inner tube 2 moves up and down, and the outer tube On the side surface of 1 is provided with a plurality of outer tube stop buckle locking holes 11, and the outer tube stop buckle locking holes 11 can be arranged on any side of the outer tube. For the convenience of description, in this embodiment, the outer tube stop buckle lock hole 11 is provided on the right side of the outer tube 1 as an example. A stop buckle 41 is fixed at the bottom of the inner tube 2. The lower part of the stop buckle 41 is heavier than the upper part. The stop buckle 41 includes a fixing part 100 at the upper part and a lower hook on the same side as the lock hole 11 of the outer tube. The boss 200, the fixing part 100 is provided with a through hole, the stop button 41 is installed on the bottom of the inner tube 2 through the fixing member 3 or the pin through the through hole, and the stop button 41 rotates with the center of the through hole as the center of rotation . Both the left and right sides of the outer tube 1 are provided with outer tube stop buckle locking holes 11, the left and right sides of the protrusion 200 are provided with obliquely downward locking teeth, and the locking teeth on both sides are arranged symmetrically. When the pull rod is vertical, the catch stop 41 is in the outer tube as a whole without external force, and the inner tube 2 can be moved up and down freely at this time. When the pull rod is tilted to the right, the stop buckle 41 also rotates and tilts to the right under the action of gravity, and the protrusion 200 on the right side of the lower part abuts against the inner wall of the outer tube 1. At this time, the inner tube 2 is pulled upward. When going up to the locking hole 11 of the outer tube, the protrusion 200 slides into the locking hole 11 of the outer tube under the action of gravity. At this time, you only need to press the inner tube 2 down slightly, and the locking button 41 is It is stuck on the lower edge of the outer tube stop buckle lock hole 11 of the outer tube 1, and the inner tube 2 can't go down if you continue to press down, so that the inner tube 2 can only be pulled upward; when the inner tube 2 continues to be pulled upward, the stop buckle 41 The inner tube 2 can be pulled upwards freely by the downward force of the side wall of the outer tube 1 and slides out from the locking hole 11 of the outer tube. When the inner tube 2 needs to be retracted, the pull rod can be vertical. The inner tube 2 is lifted up a bit, and the stop button 41 is retracted into the outer tube 1 due to its own weight, and then the inner tube 2 can be retracted. If the self-locking rod set above needs to be locked when the rod is upright, the rod must be tilted so that the stop buckle 41 is stuck to the outer tube 1 and then it is vertical again, otherwise the self-locking function cannot be exerted when the rod is up When the pull rod slides up and down vertically, the retractable buckle 41 cannot be locked, and the pull rod cannot be self-locked.

In this embodiment, the fixing member 3 includes buckle portions 31 on both sides and a convex point 32 in the middle. A structural member mounting hole 21 is provided on the side wall of the inner tube 2, and the buckle portion 31 is clamped on the outer wall of the inner tube 2. The convex point 32 passes through the structural member installation hole 21 and the through hole to fix the stop button 41 on the inner tube 2. As shown in Figure 2, it is a structural diagram of the fixing member 3. The cross section is half a word. The distance between the buckle parts 31 on both sides is slightly larger than the outer diameter of the inner tube 2, one on each side, and it is stuck on the outer wall of the inner tube 2. In the upper part, the cylindrical convex point 32 in the middle part passes through the structural member mounting hole 21 and the through hole on the stop button 41 at the same time to fix the stop button 41 in the inner tube 2. The diameter of the through hole is larger than the diameter of the cylindrical convex point 32, so the stop button 41 can rotate freely. Of course, it is also feasible to replace the fixing member 3 in this embodiment with pins, bolts, etc., as long as the stop catch 41 is connected to the inner tube 2.

Example two

Figures 7 to 11 show a second embodiment of the self-locking pull rod of the present invention. In this embodiment, the fixing member 3 includes a buckle portion 31 on both sides and a convex point 32 in the middle. The side wall of the inner tube 2 is provided There is a structural member mounting hole 21, and the buckle portion 31 is clamped on the outer wall of the inner tube 2; the tie rod also includes a structural member 4, the structural member 4 includes a structural member body 42 located at the lower part and a connecting portion 43 located at the upper part; the structural member body 42 It is a hollow structure with a stop 44 on the same side as the outer tube stop buckle lock hole 11. The stop buckle 41 is installed in the main body 42 of the structure through the mounting shaft 45 through the through hole, and can be installed in the space of the main body 42 of the structure. Swing inside; there is a mounting hole 46 in the middle of the connecting part 43, which is the same side as the structural member mounting hole 21; the structural member 4 passes through the structural member mounting hole 21 through welding, glue sticking, pins or protrusions 32 of the fixing member 3 Either way or the mounting hole 46 is fixed to the bottom of the inner tube 2. The second embodiment is different from the first embodiment in that the stop buckle 41 and the inner tube 2 are connected by the structural member 4. The structural member 4 accommodates the stop buckle 41 in the lower space and can also rotate freely. The buckle 41 can be extended and slid into the outer tube stop buckle lock hole 11, and a stop 44 is opened on the right side, so that when the pull rod is tilted upwards, the stop buckle 41 extends from the stop 44 and slides into the outer tube stop. In the locking lock hole 11, the inner tube 2 cannot slide down and can only be pulled up to complete the self-locking. The structure 4 and the inner tube 2 can be connected in a variety of ways. Just fix the structure 4 on the inner tube 2. The connection method can be welding or glue sticking. It can also be used to provide a connecting part 43 on the upper part of the structure 4. In this method, a mounting hole 46 is opened on the connecting portion 43, and a pin is used to pass through the structural member mounting hole 21 and the mounting hole 46 or to install the fixing member 3 on both sides of the connecting portion 43, so that the structural member 4 is mounted on the bottom of the inner tube 2. It is worth mentioning that the fixing member 3 can be an independent component or integrally injection molded with the main body 42 of the structural member. As shown in FIG. 11, the fixing member 3 is provided on the top of the main structural member 42 on the same side as the mounting hole 46. Or the side part, it will be more convenient to install, just flip up the fixing parts 3 on both sides directly, align the convex point 32 with the installation hole 46 and insert it.

In this embodiment, the stop catch 41 is outside the inner tube 2, partly contained in the inner tube 2, or fully embedded in the inner tube 2. When the stop catch 41 is fully embedded in the inner tube 2, the inner tube 2 and the outer tube stop catch lock The corresponding side of the hole 11 is provided with an inner tube avoiding groove so that the stop button 41 protrudes from the inner tube 2. If the stop buckle 41 is outside the inner tube 2, it will not affect the rotation of the stop buckle 41. If the stop buckle 41 is completely embedded in the inner tube 2, it is necessary to slot the corresponding side of the outer tube stop buckle lock hole 11. The stop catch 41 can be rotated to the outside normally.

Example three

Both the first embodiment and the second embodiment of the self-locking pull rod of the present invention can realize the self-locking function when the pull rod is inclined. It cannot be self-locked when the pull rod is in a vertical state. Therefore, it is designed that the pull rod can also be in a vertical state. The third embodiment for realizing self-locking, as shown in Figs. 12 to 16, in this embodiment, the fixing part 100 of the stop buckle 41 is also provided with a trigger part 300 on the side opposite to the outer tube stop buckle lock hole 11. A protruding contact point 5 is provided on the outer tube 1 spaced from the trigger portion 300 on the same side. The stop buckle 41 in this embodiment can be used alone or in combination with the structural member 4. When used alone, the stop buckle in the first embodiment can be replaced with a stop buckle with a trigger portion 300, and When the structural member 4 is used in conjunction, it is necessary to open a collision avoidance groove 47 on the same side of the structural member body 42 as the collision point 5; when the inner tube 2 is pulled up, the collision point 5 passes through the collision avoidance groove 47 and hits the trigger part 300. Apply a downward force to the trigger part 300, the stop button 41 rotates to the other side, and the raised part 200 tilts and slides into the lock hole 11 of the outer tube stop button to block the inner tube 2 so that the inner tube 2 cannot Downward can only be pulled upwards. The trigger part 300 extends laterally to the left, and the left side of the structural member 4 is provided with a collision avoidance groove 47, so that the trigger part 300 extends from the collision avoidance groove 47, and the inner left side of the outer tube 1 is provided with a collision avoidance groove 47. Point 5, the position of the contact point 5 corresponds to the position of the outer tube stop buckle lock hole 11, of course, it is also possible to press an inward concave point on the outer tube 1 instead of the contact point 5, which is mainly used to interact with the trigger part 300 The role of abutment. In this way, when the inner tube 2 is pulled upwards, the trigger part 300 hits the contact point 5 on the inner tube 2, and the trigger part 300 receives a downward force, so that the stop catch 41 rotates counterclockwise, and the lower protrusion 200 Tilt up to the right, just slide into the outer tube stop buckle lock hole 11, press the inner tube 2 slightly downwards, the stop buckle 41 is stuck on the outer edge of the outer tube stop buckle lock hole 11, so that the inner tube 2 Can not move downwards, only pull upwards to achieve the purpose of self-locking. When the inner tube 2 continues to be pulled upwards, the stop buckle 41 slides out of the outer tube stop buckle lock hole 11 under the downward force of the side wall of the outer tube 1, so that the inner tube 2 can continue to be pulled up until it reaches the top.

In this embodiment, the trigger part 300 is made of flexible material, which is soft and bendable. When the inner tube 2 goes down, the trigger part 300 deforms and falls from the touch point 5 when the inner tube 2 is in contact with the touch point 5. The force rotates clockwise, so that the protrusion 200 is far away from the outer tube stop buckle lock hole 11, avoiding the obstruction of the lower edge of the outer tube stop buckle lock hole 11, and the inner tube 2 shrinks down to the original position. When the pull rod is used in an inclined manner, the entire operation process of the pull rod being pulled up is the same as the principle of the second embodiment, and the process when the pull rod is retracted downward is the same as the principle of the vertical sliding in the third embodiment, and will not be repeated here.

Example four

The stop buckle 41 in this embodiment includes a fixing part 100 located at the upper part and provided with a through hole, and a locking part 300 located at the lower part. The end of the locking part 300 close to the lock hole 11 of the outer tube stop buckle is a lock rod 301 , The other end cooperates with the lock rod 301 to form a hook shape that can buckle the lower edge of the outer tube stop buckle lock hole 11, and the other end of the lock part is heavier than the lock rod end. The catch-stop buckle 41 maintains a balance as a whole when no external force is applied, so that the lock rod 301 is always in a horizontal state. When the pull rod is vertical, the lock rod 301 of the stop buckle 41 can extend from the outer tube stop buckle lock hole 11. Therefore, the initial state of the stop buckle 41 in the outer tube 1 is an inclined state (as shown in Figure 17). At this time, the stop buckle 41 is completely located in the outer tube 1. Since the right side of the stop buckle 41 is obviously heavier than the lock rod 301 on the left, the lock rod 301 is pressed downward by the inner wall of the outer tube 1, but always has a tendency to warp upward. , The inner tube 2 can move up and down at will at this time; when the pull rod is pulled up until the stop buckle 41 passes through the outer tube stop buckle lock hole 11, the stop buckle 41 rotates under the action of gravity to make the lock rod 301 slide into the outer tube stop The inner tube 2 cannot move down because the locking portion 300 is stuck in the lower edge of the outer tube locking locking hole 11, and the inner tube 2 can only Pull up. When the pull rod is inclined (as shown in Figure 19), the stop buckle 41 is rotated by gravity to maintain balance. At this time, the lock rod 301 will retract from the outer tube stop buckle lock hole 11, and the stop buckle 41 will be retracted as a whole In the outer tube 1, the inner tube 2 can be pulled freely. If you want to push the inner tube 2 down when the pull rod is vertical, but don't want to tilt the pull rod, you can pull the inner tube 2 up a short distance to make the stop button 41 tilt back into the outer tube 1, and then push the inner tube 2 quickly. This can achieve the purpose of pushing the inner tube 2 down by the vertical pull rod.

Example five

As shown in Figure 7, Figure 20 to Figure 23, in the self-locking pull rod in this embodiment, it also includes a lock 7 and a structural member 4 for installing the stop buckle 41 and the lock buckle 7. The structural member 4 is installed At the bottom of the inner tube 2, the outer tube 1 is provided with a touch point 5 extending in the direction of the inner tube 2, and the touch point 5 is arranged corresponding to the outer tube stop buckle lock hole 11, and the stop buckle 41 is provided with a contact portion 411 and The weight of the card portion 412, the contact portion 411 is heavier than the weight of the card portion 412, the contact portion 411 and the card portion 412 are installed in the structural member 4, the card portion 412 is clamped with the stop 44, and the card portion 412 can extend out of the stop 44 is clamped with the outer tube stop buckle lock hole 11; when the inner tube 2 is pulled up vertically, when the stop 44 rises to the outer tube stop buckle lock hole 11, since the weight of the contact part 411 is heavier than the weight of the clamping part 412, The stop buckle 41 rotates so that the clamping portion 412 can extend out of the stop 44 to engage with the stop buckle lock hole 11 of the outer tube. At this time, when you continue to press down the inner tube 2, the inner tube 2 is locked and cannot be pressed down anymore. At this time, the trolley box can be pushed away. If the inner tube 2 continues to be pulled up, the deduction 41 will be collected into the outer tube 1, and the inner tube 2 is unlocked.

A sheath 8 is provided between the outer tube 1 and the inner tube 2, and the sheath 8 is located inside the top end of the outer tube 1. The lock 7 is installed above the stop catch 41. The lock 7 includes a limiting hole 71 and a hook 72 The hook 72 can extend out of the structural member 4 to contact the sheath 8. The hook 72 is located above the contact portion 411. The structural member 4 is provided with a first limiting portion 61 that can be engaged with the limiting hole 71 and a second Two limit parts 62; when the inner tube 2 is continuously pulled upwards vertically, the hook 72 will touch the bottom of the sheath 8, and will rotate downward due to the pressure of the sheath 8 to hook the contact part 411, the limit hole 71 also changes from being clamped with the first limiting part 61 to being clamped with the second limiting part 62; when the inner tube 2 is pressed down vertically, the hook 72 is in contact with the contact point 5 (at this time, the clamping part 412 has been Pass the outer tube to stop the lock hole 11) and separate from the contact 411 due to the resistance of the contact point 5. At the same time, the limiting hole 71 also changes from being clamped with the second limiting portion 62 to being clamped with the first limiting portion 61, and the inner tube 2 can be stowed at this time.

The present invention also provides a pull rod box, which includes any of the above-mentioned self-locking pull rods. Using the self-locking pull rod and the pull rod box of the present invention, the self-locking of the pull rod is completed by the cooperation of the stop buckle with the outer tube and the inner tube, and there is no need for buttons, springs, sliders, pressure rods, pressers, etc. of traditional pull rods. The parts and components have a simple structure, reduce the weight of the tie rod, reduce manufacturing costs and simplify the production process, and enhance the overall design of the tie rod, which is convenient for users to use.

The above content is only the preferred embodiments of the present invention. For those of ordinary skill in the art, many changes can be made in the specific implementation and application scope according to the ideas of the present invention, as long as these changes do not deviate from the concept of the present invention. It belongs to the protection scope of the present invention.

Claims

A self-locking pull rod, characterized in that it comprises an outer tube, an inner tube sleeved in the outer tube, and a stop buckle rotatably installed at the bottom end of the inner tube. The outer tube stop buckle lock hole corresponding to the stop buckle position, when the stop buckle is located at the stop buckle lock hole of the outer tube, through the change of different angles of the pull rod or the speed of pulling the inner tube, the The stop buckle rotates by its own gravity and is buckled in the stop buckle lock hole of the outer tube, or is released from the stop buckle lock hole of the outer tube.
The self-locking pull rod according to claim 1, wherein the upper end of the stop buckle is provided with a through hole, and the stop buckle is installed at the bottom of the inner tube by a fixing member or a pin passing through the through hole .
The self-locking pull rod according to claim 2, wherein the fixing part includes a buckle part on both sides and a convex point in the middle part, a structural part mounting hole is provided on the side wall of the inner tube, and the The buckle is clamped on the outer wall of the inner tube, and the convex point passes through the structural member installation hole and the through hole to fix the stop buckle on the inner tube.
The self-locking pull rod according to claim 2, wherein the pull rod further includes a structural member, the structural member includes a main body of the structural member at the lower part and a connecting part at the upper part; the connecting part is fixedly installed at the At the bottom of the inner tube, the main body of the structural member is a hollow structure, and a stop is opened on the same side as the lock hole of the outer tube. The stop buckle is installed on the mounting shaft through the through hole. In the main body of the structural member, it can swing left and right in the space of the main structural member and protrude from the stop position.
The self-locking pull rod according to claim 1, wherein the stop buckle comprises a fixing part located at the upper part and provided with a through hole, and a fixing part located at the lower part and arranged on the same side as the lock hole of the outer tube stop buckle. Hook-shaped raised portion, the raised portion is heavier than the fixed portion; when the pull rod is vertical, the stop buckle is not affected by external force and is in the outer tube as a whole, and the inner tube can be moved up and down freely at this time; When the pull rod is tilted, the stop buckle is rotated by gravity, and the protrusion moves outward and falls into the stop buckle lock hole of the outer tube. At this time, the inner tube is stuck on the lower edge of the stop buckle lock hole of the outer tube due to the raised part Cannot move down, so that the inner tube can only be pulled up.
The self-locking pull rod according to claim 5, wherein the fixing part of the stop buckle is further provided with a trigger part on the side far away from the lock hole of the outer tube stop buckle, and the outer tube is provided with a trigger part. It is arranged on the same side as the trigger part and can touch the protruding contact point of the trigger part; when the inner tube is pulled up, the contact point will touch the trigger part, and the trigger part faces the The triggering part applies a downward force to rotate the stop buckle, and make the protruding part tilt and slide into the lock hole of the outer tube stop buckle.
The self-locking pull rod according to claim 6, wherein the trigger part is made of flexible material, and when the inner tube goes down, the trigger part can move down from the contact point through deformation. The reverse rotation of the stop buckle keeps the protrusion away from the lock hole of the outer tube stop buckle.
The self-locking pull rod according to claim 4, wherein the fixing member and the main body of the structural member are integrally injection molded.
The self-locking pull rod according to claim 1, wherein the stop buckle is located outside the inner tube, or partially contained in the inner tube, or fully embedded in the inner tube, when the stop stop When the buckle is fully embedded in the inner tube, a side of the inner tube corresponding to the locking hole of the outer tube is provided with an inner tube avoiding groove that is convenient for the stop buckle to extend from the inner tube .
The self-locking pull rod according to claim 1, wherein the stop buckle includes a fixing part at the upper part and provided with a through hole, and a locking part at the lower part, and the locking part is close to the outer tube to stop receiving One end of the lock hole is a lock rod, and the other end cooperates with the lock rod to form a hook shape that can buckle the lower edge of the lock hole of the outer tube, and the other end of the lock part is heavier than the end of the lock rod. The lock rod of the stop buckle is always horizontal when no external force is applied. When the pull rod is vertical, the lock rod of the stop buckle can protrude from the lock hole of the outer tube. The locking part is stuck on the lower edge of the outer tube stop buckle lock hole and cannot move down, so that the inner tube can only be pulled upward; when the pull rod is tilted, the stop buckle is rotated by gravity, so that the lock rod can stop receiving from the outer tube Retract from the lock hole, and the inner tube can be pulled freely at this time.
The self-locking pull rod according to claim 5, wherein the left and right sides of the outer tube are provided with outer tube stop buckle lock holes, and the left and right sides of the protrusion are provided with diagonally downward locks. The teeth, the locking teeth on both sides are arranged symmetrically.
The self-locking pull rod according to claim 1, further comprising a lock buckle and a structural member for installing the stop buckle and the lock buckle, and the structural member is installed at the bottom of the inner tube , The outer tube is provided with a bumping point extending in the direction of the inner tube, the bumping point is provided corresponding to the outer tube stop buckle lock hole, the structural member is provided with a stop, the stop The buckle is provided with a contact portion and a clip portion, the weight of the contact portion is heavier than the weight of the clip portion, the contact portion and the clip portion are both installed in the structural member, the clip portion and the When the inner tube is pulled vertically upward, the stop position rises to the outer tube stop. When the lock hole is retracted, since the weight of the contact portion is heavier than the weight of the clip portion, the retention buckle rotates so that the clip portion can extend out of the stop position and the outer tube retention buckle lock Hole card connection.
The self-locking pull rod according to claim 12, wherein a sheath is provided between the outer tube and the inner tube, the sheath is located inside the top end of the outer tube, and the lock is installed Above the stop buckle, the lock buckle includes a limiting hole and a hook portion, the hook portion can extend out of the structural member to contact the sheath, and the hook portion is located above the contact portion , The structural member is provided with a first limiting portion and a second limiting portion that can be engaged with the limiting hole; when the inner tube continues to be pulled vertically upwards, the hook will touch The bottom of the cover, and due to the pressure of the cover, rotates downward to hook the contact portion, the limiting hole also changes from being engaged with the first limiting portion to being connected to the second The limit part is clamped; when the inner tube is vertically pressed down, the hook part contacts the touch point and is separated from the touch part due to the resistance of the touch point, the limit hole It also changes from being connected to the second limiting part back to being connected to the first limiting part.
A trolley case, characterized by comprising the self-locking pull rod according to any one of claims 1-13.