Anti-shake locking mechanism of telescopic draw bar of draw-bar box

Abstract

The invention belongs to the technical field of luggage equipment, and particularly relates to an anti-shake locking mechanism of a telescopic draw bar of a draw-bar box, which comprises a fixed rod and a telescopic rod, the telescopic rod is movably connected with the fixed rod in the length direction, so that the telescopic rod can be switched between a contraction station and an extension station; the device further comprises a clamping block, and the clamping block is movably arranged relative to the fixing rod in at least the radial direction of the fixing rod so that the clamping block can be switched between a locking station and an unlocking station. A first linkage mechanism is arranged between the clamping block and the telescopic rod, and when the telescopic rod is switched to the stretching station from the contraction station, the clamping block can be driven to be switched to the locking station from the unlocking station. The structural rigidity and use stability of the pull rod in the stretching state are remarkably improved while original stretching smoothness is maintained, additional operation of a user is not needed in the whole process, the shaking defect of a traditional pull rod is overcome, and use convenience is kept.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of luggage equipment, and particularly relates to a jitter-prevention locking mechanism of a telescopic pull rod of a trolley case. BACKGROUND

[0002] In the design of the telescopic pull rod of the trolley case, a reasonable fitting gap is usually needed to be set between the outer rod and the inner rod to ensure the smoothness of the telescopic movement. This design is mainly based on the following two considerations: first, the appropriate gap can avoid the jamming phenomenon of the rod due to the thermal expansion and cold contraction effect; second, the existence of the gap can effectively reduce the frictional resistance when the rod moves relatively. However, this necessary structural gap will bring obvious side effects in actual use: when the inner rod is in the extended state, the fitting gap between the rods will be converted into the radial play in the use state, resulting in obvious radial shaking of the inner rod relative to the outer rod, which not only affects the user's experience, but also may reduce the structural stability of the pull rod. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a jitter-prevention locking mechanism of a telescopic pull rod of a trolley case, which can ensure the smoothness of the telescopic movement while improving the stability of the pull rod.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a jitter-prevention locking mechanism of a telescopic pull rod of a trolley case, comprising a fixed rod and a telescopic rod. The fixed rod and the telescopic rod are both tubular structures. The telescopic rod is inserted into the fixed rod and is movably connected with the fixed rod along the length direction, so that the telescopic rod can be switched between the retracted working position and the extended working position. Further comprising a clamping block, which is movably arranged relative to the fixed rod along at least the radial direction of the fixed rod, so that the clamping block can be switched between the locking working position of pressing the outer wall of the telescopic rod and the unlocking working position of loosening the outer wall of the telescopic rod. A first linkage mechanism is provided between the clamping block and the telescopic rod, which is assembled to drive the clamping block to switch from the unlocking working position to the locking working position through the first linkage mechanism when the telescopic rod switches from the retracted working position to the extended working position.

[0005] In an optional embodiment of the present application, the telescopic rod is provided with a locking pin, the fixed rod is provided with a pin hole matched with the locking pin, the locking pin is movably arranged along the radial direction of the telescopic rod, the telescopic rod is provided with a first elastic element, the first elastic element is configured to drive the locking pin to be inserted into the pin hole when the telescopic rod is in the stretching position; one end of the telescopic rod is provided with a handle part, the handle part is provided with a button, the button is in transmission connection with the locking pin through a transmission mechanism, the transmission mechanism is configured to drive the locking pin to be separated from the pin hole and into the telescopic rod when the button is pressed.

[0006] In an optional embodiment of the present application, the transmission mechanism and the clamping block are provided with a second linkage mechanism, the second linkage mechanism is configured to drive the clamping block to be switched from the locking position to the unlocking position through the transmission mechanism and the second linkage mechanism when the button is pressed.

[0007] In an optional embodiment of the present application, the first linkage mechanism comprises a floating support, the floating support is movably arranged along the length direction of the fixed rod, the fixed rod is provided with a fixed seat, the floating support is fixed with a movable seat, the clamping block is movably connected with the movable seat along the radial direction of the fixed rod, the movable seat is movably connected with the fixed seat along the length direction of the fixed rod, the clamping block and the fixed seat are provided with matched inclined surfaces, the inclined surfaces are configured to drive the clamping block to move towards the outer wall of the telescopic rod when the movable seat moves towards the stretching direction of the telescopic rod; the fixed rod is provided with a fixed support, the floating support and the fixed support are provided with a second elastic element, the second elastic element is configured to drive the floating support to move towards the stretching direction of the telescopic rod by the elastic force of the second elastic element.

[0008] In an optional embodiment of the present application, the floating support is configured to be switched between a first position and a second position along the length direction of the fixed rod, the inclined surfaces of the clamping block and the fixed seat are separated from each other in the first position, the inclined surfaces of the clamping block and the fixed seat are in contact with each other in the second position; the floating support and the fixed rod are provided with a locking mechanism, the locking mechanism is configured to keep the floating support in the first position when the floating support is in the first position, and the locking pin can drive the locking mechanism to release the floating support from the first position to make the floating support be switched to the second position under the action of the second elastic element when the telescopic rod is switched to the stretching position.

[0009] In an optional embodiment of the present application, the locking mechanism comprises an elastic arm elastically connected with the floating support, and a protrusion arranged on the outer wall of the fixed rod, and a step portion arranged on the elastic arm and matched with the protrusion, when the floating support is located at the first position, the step portion and the protrusion are in contact with each other to prevent the floating support from moving to the second position; the size of the pin hole in the length direction of the fixed rod is greater than the diameter of the locking pin, so that the locking pin can move in the pin hole along the length direction of the fixed rod after being inserted into the pin hole; the locking pin protrudes from the outer wall of the fixed rod, and the elastic arm is provided with a guide surface matched with the locking pin, and the guide surface is configured to allow the locking pin to press the guide surface and drive the elastic arm to swing when the locking pin moves in the pin hole in the extension direction of the telescopic rod, so that the step portion is separated from the protrusion.

[0010] In an optional embodiment of the present application, the elastic arm is provided with a limiting hook, when the floating support is located at the second position, the limiting hook is in contact with the side of the locking pin away from the guide surface to prevent the telescopic rod from moving to the contraction station.

[0011] In an optional embodiment of the present application, the transmission mechanism comprises a pressing rod and a driving block, one end of the pressing rod is fixedly connected with the button, the other end of the pressing rod is in contact with the driving block, the driving block is movably arranged relative to the telescopic rod along the length direction of the telescopic rod, the locking pin is installed on a sliding block sliding along the radial direction of the telescopic rod, the sliding block is provided with a waist-shaped groove arranged obliquely, the driving block is provided with a guide rod matched with the waist-shaped groove, and the oblique direction of the waist-shaped groove is configured to allow the driving block to drive the sliding block to move away from the pin hole when the driving block moves away from the handle portion, so that the locking pin is separated from the pin hole.

[0012] In an optional embodiment of the present application, the second linkage mechanism comprises a pressing block arranged on the driving block and a stop block arranged on the floating support, the stop block is movably connected with the floating support along the radial direction of the telescopic rod, the fixed rod is provided with a first hollow part opposite to the stop block, the telescopic rod is provided with a second hollow part, when the telescopic rod is located in the stretching station, the second hollow part is arranged opposite to the stop block, a third elastic element is arranged between the stop block and the floating support, when the telescopic rod is located in the stretching station and the floating support is located in the second position, the third elastic element can drive the stop block to be inserted into the telescopic rod from the first hollow part and the second hollow part, at this time, the side of the stop block away from the handle part abuts against the pressing block; the side of the stop block away from the handle part is provided with a wedge surface, when the floating support moves from the second position to the first position, the wedge surface can be pressed by the edge of the first hollow part, so that the stop block is separated from the telescopic rod.

[0013] In an optional embodiment of the present application, the side of the clamping block opposite to the outer wall of the telescopic rod is made of elastic material.

[0014] The technical effect of the present application is that the cooperation of the clamping block and the first linkage mechanism realizes the automatic locking function of the telescopic rod in the stretching state: when the telescopic rod is pulled out from the retracted state, the first linkage mechanism keeps the clamping block in the unlocked state to ensure smooth pulling; after the telescopic rod is completely stretched in place, the first linkage mechanism automatically drives the clamping block to press the outer wall of the telescopic rod radially, effectively eliminating the radial shaking caused by the cooperation gap. This structure maintains the original smoothness of stretching, significantly improves the structural rigidity and use stability of the pull rod in the stretched state, and the whole process does not require additional operation by the user, which not only solves the shaking defect of the traditional pull rod, but also maintains the convenience of use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the trolley case provided by the embodiment of the present application; Figure 2 is a perspective view of the telescopic pull rod provided by the embodiment of the present application; Figure 3 is a partial enlarged view of I of Figure 2 Figure 4 is a front view of the telescopic pull rod provided by the embodiment of the present application; Figure 5 is an A-A sectional view of Figure 4 Figure 6 is a B-B sectional view of Figure 5 Figure 7 ​​​is a C-C sectional view of Figure 6 Figure 8 is a I partial enlarged view of Figure 7 Figure 9 is a sectional view of a handle part provided by an embodiment of the present application; Figure 10 is a sectional view of the area shown in another state; Figure 7 Figure 11 is a sectional view of the area shown in another state; Figure 6 Figure 12 is a sectional view of the area shown in another state; Figure 7 BRIEF DESCRIPTION OF DRAWINGS 100, box; 10, fixed rod; 101, pin hole; 102, first hollow part; 11, protrusion; 12, fixed seat; 20, telescopic rod; 201, second hollow part; 21, locking pin; 210, sliding block; 211, waist-shaped groove; 22, first elastic element; 30, fixed support; 40, floating support; 41, elastic arm; 411, step part; 412, guide surface; 413, limiting hook; 42, movable seat; 43, clamping block; 44, stop block; 45, third elastic element; 50, second elastic element; 60, handle part; 61, button; 62, pressing rod; 63, driving block; 64, guide rod; 65, pressing block. DETAILED DESCRIPTION

[0016] The present application is described in greater detail by the following specific examples. Other advantages and benefits of the present application will become apparent to those skilled in the art upon consideration of the disclosure and the appended claims. The present application can be practiced in different but equivalent ways without departing from the spirit thereof, and the individual features of the examples described can be combined in different ways without departing from the spirit of the application. It is to be understood that the following examples and features thereof can be combined with each other in the absence of conflict.

[0017] It should be noted that the drawings provided in the following examples only schematically illustrate the basic concept of the present application, and thus only show the components related to the present application in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The shapes, number and proportions of the components in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0018] ​​​​​The telescopic handle of the trolley case is composed of a fixed rod and a plurality of telescopic rods, the number of the telescopic rods depends on the size of the case body, for example, when the case body is high, only one telescopic rod can be used, and the telescopic rod is inserted into the fixed rod. In order to ensure the smoothness of the telescopic movement of the telescopic rod, a reasonable fitting gap is usually required between the fixed rod and the telescopic rod to avoid the jamming phenomenon caused by the thermal expansion and cold contraction effect of the rod, and the existence of the gap can effectively reduce the friction resistance when the rod moves relatively. However, the necessary structural gap will cause a radial play between the telescopic rod and the fixed rod in the extended state, which will cause the telescopic rod to shake obviously relative to the fixed rod, which not only affects the user's experience, but also may reduce the structural stability of the handle. Therefore, the clamping device is arranged between the telescopic rod and the fixed rod, the clamping device is in the loosening state during the extension process of the telescopic rod, and the smooth extraction of the telescopic rod is ensured. When the telescopic rod reaches the extended state, the clamping device can automatically clamp the telescopic rod to prevent the telescopic rod from shaking, in addition, the clamping device can be linked with the locking release button of the handle mechanism itself, when the user presses the button on the handle, the clamping device can be driven again to loosen the telescopic rod synchronously, and then the telescopic rod can be smoothly retracted.

[0019] The technical solutions of the present application will be described in detail below in combination with specific embodiments: Please refer to Figures 1-12 As shown in the drawings, the embodiment of the present application provides a trolley case, which comprises a case body 100 and a telescopic handle with an anti-shaking locking mechanism, the telescopic handle comprises a fixed rod 10 and a telescopic rod 20; the fixed rod 10 and the telescopic rod 20 are both tubular structures; the telescopic rod 20 is inserted into the fixed rod 10 and is movably connected with the fixed rod 10 along the length direction, so that the telescopic rod 20 can be switched between a retracted position and an extended position; further comprising a clamping block 43, the clamping block 43 is movably arranged along at least the radial direction of the fixed rod 10 relative to the fixed rod 10, so that the clamping block 43 can be switched between a locking position for pressing the outer wall of the telescopic rod 20 and an unlocking position for loosening the outer wall of the telescopic rod 20; a first linkage mechanism is arranged between the clamping block 43 and the telescopic rod 20, and the first linkage mechanism is assembled to drive the clamping block 43 to switch from the unlocking position to the locking position through the first linkage mechanism when the telescopic rod 20 is switched from the retracted position to the extended position.

[0020] The application realizes the automatic locking function of the telescopic rod 20 in the stretched state through the cooperation design of the clamping block 43 and the first linkage mechanism: when the telescopic rod 20 is pulled out from the contracted state, the first linkage mechanism keeps the clamping block 43 in the unlocked state to ensure smooth pulling; after the telescopic rod 20 is completely stretched in place, the first linkage mechanism automatically drives the clamping block 43 to press the outer wall of the telescopic rod 20 radially, effectively eliminating the radial shaking caused by the cooperation gap. The structure maintains the original smoothness of stretching, significantly improves the structural rigidity and use stability of the pull rod in the stretched state, and does not require additional user operation during the entire process, which solves the shaking defect of the traditional pull rod and maintains the convenience of use.

[0021] Please refer to Figure 6 、 9 In an optional embodiment of the application, as shown in the drawings, the telescopic rod 20 is provided with a locking pin 21, the fixed rod 10 is provided with a pin hole 101 matched with the locking pin 21, the locking pin 21 is movably arranged along the radial direction of the telescopic rod 20 relative to the telescopic rod 20, and the telescopic rod 20 is provided with a first elastic element 22, which is arranged to drive the locking pin 21 to insert into the pin hole 101 when the telescopic rod 20 is in the stretched position by the elastic force of the first elastic element 22. One end of the telescopic rod 20 is provided with a handle part 60, the handle part 60 is provided with a button 61, the button 61 is in transmission connection with the locking pin 21 through a transmission mechanism, the transmission mechanism is arranged to drive the locking pin 21 to separate from the pin hole 101 into the telescopic rod 20 when the button 61 is pressed down, and a spring is arranged between the button 61 and the handle part 60 to drive the button 61 to reset. This embodiment realizes rigid locking when the telescopic rod 20 is stretched in place through the mechanical interlocking cooperation of the locking pin 21 and the pin hole 101 combined with the automatic elastic driving of the first elastic element 22, effectively prevents the pull rod from accidentally retracting under the condition of heavy load or bumping, and specifically, when the telescopic rod 20 reaches the stretched position, the elastic element automatically pops the locking pin 21 into the pin hole 101 of the fixed rod 10 to form a mechanical block, and when the user actively presses the button 61, the locking pin 21 can be driven to separate from the pin hole 101 through the transmission mechanism, so as to release the above locking state and ensure that the telescopic rod 20 can be smoothly retracted.

[0022] Please refer to Figure 7 、 8, 10, 12, in an optional embodiment of the present application, the transmission mechanism and the clamp block 43 between the second linkage mechanism is equipped with, the second linkage mechanism is equipped as when the button 61 is pressed down can be driven by the transmission mechanism and the second linkage mechanism clamp block 43 from the locking station switching to the unlocking station. The embodiment through the second linkage mechanism clamp block 43 action and locking button 61 mechanical coupling, the realization of anti-shake locking and telescopic function linkage; when the user presses the button 61 to remove the locking pin 21, the second linkage mechanism synchronous drive clamp block 43 radial loose telescopic rod 20, ensure that the telescopic rod 20 in the retraction process neither mechanical interference nor additional friction resistance, while through the mechanical linkage ensures the accuracy of the operation timing, avoid the problem of jamming caused by the clamp device is not timely loose.

[0023] Please refer to Figure 5 、 7 , 8, 10, in an optional embodiment of the present application, the first linkage mechanism includes a floating bracket 40, the floating bracket 40 along the length direction of the fixed rod 10 activity settings, the fixed rod 10 is provided with a fixed seat 12, the floating bracket 40 is fixed with a movable seat 42, the clamp block 43 along the radial direction of the fixed rod 10 and the movable seat 42 activity connection, the movable seat 42 along the length direction of the fixed rod 10 and the fixed seat 12 activity connection, the clamp block 43 and the fixed seat 12 is provided with a matching inclined surface, the inclined surface is configured to when the movable seat 42 to the stretching direction of the telescopic rod 20 movement, the clamp block 43 can be extruded under the inclined surface to the direction of the telescopic rod 20 outer wall close to movement; the fixed rod 10 is provided with a fixed bracket 30, the floating bracket 40 and the fixed bracket 30 between the second elastic element 50, the second elastic element 50 is equipped with its elastic force can drive the floating bracket 40 to the stretching direction of the telescopic rod 20 movement. The embodiment through the inclined surface linkage mechanism and the elastic element of the synergies, the realization of telescopic rod 20 in the stretching process of self locking function; when the user pulls the telescopic rod 20, the floating bracket 40 in the second elastic element 50 push synchronous movement, through the movable seat 42 and the fixed seat 12 of the inclined surface matching the axial tension into radial clamping force, so that the greater the telescopic rod 20 received tension, clamp block 43 on the rod body compression force is stronger, in the full stretch through the load automatically enhanced locking strength.

[0024] Please refer to Figure 3 、 5-8、10, in an optional embodiment of the present application, the floating support 40 is configured to be able to switch along the length direction of the fixed rod 10 between a first position and a second position, in the first position, the clamping block 43 and the inclined surface of the fixed seat 12 are separated from each other, in the second position, the clamping block 43 and the inclined surface of the fixed seat 12 are in contact with each other; the locking mechanism is provided between the floating support 40 and the fixed rod 10, the locking mechanism is assembled to be able to keep the floating support 40 in the first position when the floating support 40 is in the first position, and the locking pin 21 can drive the locking mechanism to release the floating support 40 from the first position when the telescopic rod 20 switches to the stretching station, so that the floating support 40 switches to the second position under the action of the second elastic element 50. When the telescopic rod 20 is in the telescopic process, the locking mechanism fixes the floating support 40 in the first position, so that the clamping block 43 remains in the separated state, ensuring that the telescopic rod 20 can slide freely without friction resistance; when the telescopic rod 20 is fully stretched into place, the locking pin 21 triggers the locking mechanism to release the floating support 40, so that it automatically moves to the second position under the action of the elastic element, and drives the clamping block 43 to press the telescopic rod 20 through the inclined surface mechanism, which not only retains the smoothness of the operation of the pull rod, but also ensures the rigid support during use, and realizes the seamless switching between the two working conditions through mechanical linkage.

[0025] Please refer to Figure 3 , 5,6, in an optional embodiment of the present application, the locking mechanism includes an elastic arm 41 elastically connected with the floating support 40, and a protrusion 11 provided on the outer wall of the fixed rod 10, the elastic arm 41 is provided with a stepped portion 411 matched with the protrusion 11, when the floating support 40 is located at the first position, the stepped portion 411 and the protrusion 11 are in contact with each other to prevent the floating support 40 from moving to the second position; the size of the pin hole 101 in the length direction of the fixed rod 10 is greater than the diameter of the locking pin 21, so that the locking pin 21 can move in the pin hole 101 along the length direction of the fixed rod 10 after being inserted into the pin hole 101; the locking pin 21 protrudes from the outer wall of the fixed rod 10, the elastic arm 41 is provided with a guide surface 412 matched with the locking pin 21, the guide surface 412 is configured to allow the locking pin 21 to press the guide surface 412 and drive the elastic arm 41 to swing when the locking pin 21 moves in the pin hole 101 in the extension direction of the telescopic rod 20, so that the stepped portion 411 is separated from the protrusion 11. This embodiment realizes the simplification of the unlocking mechanism of the floating support 40 through the linkage design of the locking pin 21 and the guide surface 412 of the elastic arm 41; when the telescopic rod 20 is extended in place, the radial movement of the locking pin 21 in the pin hole 101 naturally presses the guide surface 412 of the elastic arm 41, and the movement trajectory of the locking pin 21 itself drives the stepped portion 411 to separate from the protrusion 11, which eliminates the need for additional unlocking control components.

[0026] Please refer to Figure 3 、 5 , in an optional embodiment of the present application, the elastic arm 41 is provided with a limiting hook 413, when the floating support 40 is located at the second position, the limiting hook 413 abuts against the side of the locking pin 21 away from the guide surface 412 to prevent the telescopic rod 20 from moving to the contraction station, and the locking pin 21 is constrained by the limiting hook 413 to avoid the possibility of accidental retraction.

[0027] Please refer to Figure 6 、 9,11, in an optional embodiment of the present application, the transmission mechanism includes a pressure rod 62 and a driving block 63, one end of the pressure rod 62 is fixedly connected with the button 61, the other end of the pressure rod 62 is in abutment with the driving block 63, the driving block 63 is movably arranged along the length direction of the telescopic rod 20 relative to the telescopic rod 20, the locking pin 21 is installed on a sliding block 210 which slides along the radial direction of the telescopic rod 20, the sliding block 210 is provided with a waist-shaped groove 211 which is obliquely arranged, the driving block 63 is provided with a guide rod 64 which cooperates with the waist-shaped groove 211, the oblique direction of the waist-shaped groove 211 is configured as: when the driving block 63 moves away from the handle part 60, the driving block 63 can drive the sliding block 210 to move away from the pin hole 101, so that the locking pin 21 is separated from the pin hole 101. Please refer to Figure 7 , 9 ,11, the second linkage mechanism includes a pressing block 65 arranged on the driving block 63 and a stop block 44 arranged on the floating support 40, the stop block 44 is movably connected with the floating support 40 along the radial direction of the telescopic rod 20, the fixed rod 10 is provided with a first hollow part 102 opposite to the stop block 44, the telescopic rod 20 is provided with a second hollow part 201, when the telescopic rod 20 is located in the stretching station, the second hollow part 201 is arranged opposite to the stop block 44, a third elastic element 45 is arranged between the stop block 44 and the floating support 40, the third elastic element 45 is configured as: when the telescopic rod 20 is located in the stretching station and the floating support 40 is located in the second position, the third elastic element 45 can drive the stop block 44 to insert into the telescopic rod 20 from the first hollow part 102 and the second hollow part 201, at this time, the stop block 44 is in abutment with the side of the pressing block 65 which is away from the handle part 60; the side of the stop block 44 which is away from the handle part 60 is provided with a wedge surface, when the floating support 40 moves from the second position to the first position, the wedge surface can be pressed by the edge of the first hollow part 102, so that the stop block 44 is separated from the telescopic rod 20. This embodiment realizes the double unlocking function under the operation of a single button 61 through the linkage design of the stop block 44 and the pressing block 65; when the button 61 is pressed, the driving block 63 simultaneously completes two key actions through the linkage of the pressure rod 62, that is, the locking pin 21 is withdrawn from the pin hole 101 to release the main locking through the waist-shaped groove 211 mechanism, and the floating support 40 is pushed back to the first position through the pressing block 65, so that the floating support 40 is re-locked by the locking mechanism, at the same time, the stop block 44 is automatically separated from below the pressing block 65 in the process of returning to the first position of the floating support 40, which prevents the subsequent contraction of the telescopic rod 20 from being interfered, simplifies the complex unlocking process into a pressing action, and greatly improves the convenience and fluency of the telescopic rod 20 contraction operation.

[0028] In an optional embodiment of the present application, the side of the clamping block 43 opposite to the outer wall of the telescopic rod 20 is made of elastic material. The elastic material can adapt to the slight unevenness of the outer wall of the telescopic rod 20 when the clamping block 43 is pressed, and increase the actual contact area through elastic deformation, thereby avoiding the abnormal noise and wear caused by direct contact of metal while maintaining sufficient friction.

[0029] The specific principle of the telescopic rod of the present application is as follows: During the process of pulling out the telescopic rod 20, when the telescopic rod 20 is about to reach the extension station, the locking pin 21 is popped into the pin hole 101, as shown in Figure 5 、 6 , the floating bracket 40 is in the Figure 7 、 8 position shown in the figure, and the clamping block 43 is not pressed against the outer wall of the telescopic rod 20; then the telescopic rod 20 is continuously pulled out, as shown in Figure 5 , the locking pin 21 moves upward along the pin hole 101 and presses the elastic arm 41, so that the elastic arm 41 is separated from the protrusion 11, at this time the floating bracket 40 moves to the Figure 10 position shown in the figure under the elastic force of the second elastic element 50, so that the clamping block 43 is pressed against the outer wall of the telescopic rod 20, at the same time, the stop block 44 protrudes below the pressing block 65 under the elastic force of the third elastic element 45, at this time the telescopic rod 20 is completely fixed.

[0030] When it is needed to retract the telescopic rod 20, the user presses the button 61, the button 61 drives the locking pin 21 to move away from the pin hole 101 through the transmission mechanism, as shown in Figure 11 , at the same time, the pressing block 65 presses the stop block 44 downward, the stop block 44 drives the floating bracket 40 to move downward, until the elastic arm 41 is re-clocked on the protrusion 11, as shown in Figure 5 , in addition, as shown in Figure 10 、 12 , during the downward movement of the stop block 44, the inclined wedge surface at the lower end of the stop block 44 is pressed by the bottom edge of the first hollow part 102, so that the stop block 44 gradually moves away from below the pressing block 65, as shown in Figure 12 , at this time, it is necessary to ensure that the step part 411 on the elastic arm 41 has moved below the protrusion 11 before the stop block 44 is completely moved away from below the pressing block 65, so that the step part 411 can abut against the protrusion 11 after the stop block 44 is completely separated from the pressing block 65, thereby making the floating bracket 40 re-remain in the first position; finally, the handle part 60 is pressed with force until the telescopic rod 20 reaches the retraction station, and the telescopic rod 20 can be retracted into the fixed rod 10.

[0031] The above embodiments are only illustrative of the principles of the present application and its efficacy, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A trolley case telescopic trolley anti-shake locking mechanism, characterized in that, The fixed rod (10) and the telescopic rod (20) are both tubular structures. The telescopic rod (20) is inserted into the fixed rod (10) and movably connected with the fixed rod (10) in the length direction, so that the telescopic rod (20) can be switched between a retracted position and an extended position. Further comprising a clamping block (43) movably arranged relative to the fixed rod (10) in at least the radial direction of the fixed rod (10), so that the clamping block (43) can be switched between a locking position for pressing the outer wall of the telescopic rod (20) and an unlocking position for releasing the outer wall of the telescopic rod (20). The first linkage mechanism is configured to drive the clamping block (43) to switch from the unlocking position to the locking position through the first linkage mechanism when the telescopic rod (20) is switched from the retracted position to the extended position. The telescopic rod (20) is provided with a locking pin (21), and the fixed rod (10) is provided with a pin hole (101) matched with the locking pin (21). The locking pin (21) is movably arranged relative to the telescopic rod (20) in the radial direction of the telescopic rod (20). The telescopic rod (20) is provided with a first elastic element (22). When the telescopic rod (20) is in the extended position, the elastic force of the first elastic element (22) can drive the locking pin (21) to insert into the pin hole (101). One end of the telescopic rod (20) is provided with a handle portion (60), and the handle portion (60) is provided with a button (61). The button (61) is in transmission connection with the locking pin (21) through a transmission mechanism. The transmission mechanism is configured to drive the locking pin (21) to move away from the pin hole (101) into the telescopic rod (20) when the button (61) is pressed down.

2. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar bag according to claim 1, characterized in that, The second linkage mechanism is configured to drive the clamping block (43) to switch from the locking position to the unlocking position through the transmission mechanism and the second linkage mechanism when the button (61) is pressed down.

3. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar bag according to claim 2, characterized in that, ​ 4. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar bag according to claim 3, characterized in that, The first linkage mechanism comprises a floating support (40) movably arranged along the length direction of the fixed rod (10), the fixed rod (10) is provided with a fixed seat (12), the floating support (40) is fixed with a movable seat (42), the clamping block (43) is movably connected with the movable seat (42) along the radial direction of the fixed rod (10), the movable seat (42) is movably connected with the fixed seat (12) along the length direction of the fixed rod (10), the clamping block (43) and the fixed seat (12) are provided with mutually matched inclined surfaces, the inclined surfaces are configured such that when the movable seat (42) moves towards the extension direction of the telescopic rod (20), the clamping block (43) can move towards the direction close to the outer wall of the telescopic rod (20) under the extrusion of the inclined surface; the fixed rod (10) is provided with a fixed support (30), the second elastic element (50) is arranged between the floating support (40) and the fixed support (30), and the second elastic element (50) is assembled such that the elastic force thereof can drive the floating support (40) to move towards the extension direction of the telescopic rod (20).

5. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar bag according to claim 4, characterized in that, The floating support (40) is configured to be able to switch between a first position and a second position along the length direction of the fixed rod (10), in the first position, the inclined surfaces of the clamping block (43) and the fixed seat (12) are separated from each other, in the second position, the inclined surfaces of the clamping block (43) and the fixed seat (12) abut each other; the locking mechanism is arranged between the floating support (40) and the fixed rod (10), and the locking mechanism is assembled such that when the floating support (40) is located at the first position, the locking mechanism can keep the floating support (40) at the first position, and when the telescopic rod (20) is switched to the extension station, the locking pin (21) can drive the locking mechanism to release the floating support (40) from the first position, so that the floating support (40) is switched to the second position under the action of the second elastic element (50).

6. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar suitcase according to claim 5, characterized in that, The locking mechanism comprises an elastic arm (41) elastically connected with the floating support (40), and a protrusion (11) arranged on the outer wall of the fixed rod (10), the elastic arm (41) is provided with a stepped portion (411) matched with the protrusion (11), when the floating support (40) is located at the first position, the stepped portion (411) and the protrusion (11) are in mutual resistance, so as to prevent the floating support (40) from moving to the second position; the size of the pin hole (101) in the length direction of the fixed rod (10) is greater than the diameter of the locking pin (21), so that the locking pin (21) can move in the pin hole (101) along the length direction of the fixed rod (10) after being inserted into the pin hole (101); the locking pin (21) protrudes from the outer wall of the fixed rod (10), the elastic arm (41) is provided with a guide surface (412) matched with the locking pin (21), the guide surface (412) is configured to be pressed by the locking pin (21) when the locking pin (21) moves in the pin hole (101) to the extension direction of the telescopic rod (20), and the elastic arm (41) is driven to swing, so that the stepped portion (411) is separated from the protrusion (11).

7. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar suitcase according to claim 6, characterized in that, The elastic arm (41) is provided with a limiting hook (413), when the floating support (40) is located at the second position, the limiting hook (413) abuts against the side of the locking pin (21) away from the guide surface (412), so as to prevent the telescopic rod (20) from moving to the contraction station.

8. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar suitcase according to claim 6, characterized in that, The transmission mechanism comprises a pressing rod (62) and a driving block (63), one end of the pressing rod (62) is fixedly connected with the button (61), the other end of the pressing rod (62) abuts against the driving block (63), the driving block (63) is movably arranged relative to the telescopic rod (20) along the length direction of the telescopic rod (20), the locking pin (21) is installed on a sliding block (210) sliding along the radial direction of the telescopic rod (20), the sliding block (210) is provided with a waist-shaped groove (211) arranged obliquely, the driving block (63) is provided with a guide rod (64) matched with the waist-shaped groove (211), and the oblique direction of the waist-shaped groove (211) is configured as follows: when the driving block (63) moves away from the handle portion (60), the driving block (63) can drive the sliding block (210) to move away from the pin hole (101), so that the locking pin (21) is separated from the pin hole (101).

9. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar suitcase according to claim 8, characterized in that, The second linkage mechanism comprises a pressing block (65) arranged on a driving block (63) and a stop block (44) arranged on the floating support (40), the stop block (44) being movably connected with the floating support (40) along the radial direction of the telescopic rod (20), the fixed rod (10) being provided with a first hollow part (102) opposite to the stop block (44), the telescopic rod (20) being provided with a second hollow part (201), the second hollow part (201) being arranged opposite to the stop block (44) when the telescopic rod (20) is located in the stretching station, a third elastic element (45) being arranged between the stop block (44) and the floating support (40), the third elastic element (45) being assembled such that when the telescopic rod (20) is located in the stretching station and the floating support (40) is located in the second position, the third elastic element (45) can drive the stop block (44) to be inserted into the telescopic rod (20) from the first hollow part (102) and the second hollow part (201), at this time, the stop block (44) is blocked with the side of the pressing block (65) away from the handle part (60); the side of the stop block (44) away from the handle part (60) is provided with a wedge surface, when the floating support (40) moves from the second position to the first position, the wedge surface can be pressed by the edge of the first hollow part (102) to make the stop block (44) be separated from the telescopic rod (20).

10. The anti-shake lock mechanism of the telescopic draw bar of the draw-bar suitcase according to claim 1, characterized in that, The side of the clamping block (43) opposite to the outer wall of the telescopic rod (20) is made of elastic material.

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