Limiting assembly, pull rod mechanism and pull rod device

Abstract

The invention discloses a limiting assembly, a pull rod mechanism and a pull rod device, and relates to the field of limiting adjusting structures, the limiting assembly is used for limiting displacement between a movable assembly and a fixed assembly, the limiting assembly comprises a support, the support is fixedly connected with the movable assembly and movably arranged in the fixed assembly, and the movable assembly is fixedly connected with the support; the support is provided with a containing cavity and a limiting hole communicated with the containing cavity, and a limiting piece is movably arranged in the limiting hole. The driving block is movably arranged in the accommodating cavity; the elastic piece is in driving connection with the driving block so as to drive the driving block to have the trend of moving from the unlocking position to the locking position; in the locking position, the driving block abuts against the limiting piece so that the limiting piece can be pressed on the inner wall of the fixing assembly. In the unlocking position, the driving block releases the limiting piece so that the limiting piece and the fixing assembly can slide relative to each other. The pull rod mechanism comprises a fixed assembly, a movable assembly and the limiting assembly. The pull rod device comprises a device body and the pull rod mechanism, and the pull rod mechanism is the pull rod mechanism.

Description

Technical Field

[0001] This invention relates to the field of limit adjustment structure technology, and in particular to a limit component, a pull rod mechanism, and a pull rod device. Background Technology

[0002] Some devices, such as medium or large speakers, are equipped with wheels and a pull rod at the bottom for easy portability. The pull rod is a major load-bearing component, and its design directly affects the user's carrying experience. Since everyone's height is different, the required extension length of the pull rod also varies, so pull rods are generally designed to be adjustable.

[0003] However, most current adjustable levers have a few pre-set levels, and the limiting mechanism only engages when the adjustment reaches a specific position. This limited range of adjustment levels means that the lever cannot meet the needs of users of different heights, causing some users to bend their arms or adjust their posture during use, resulting in discomfort and reduced carrying comfort. Summary of the Invention

[0004] The main objective of this invention is to provide a limiting component, a pull rod mechanism, and a pull rod device, aiming to solve the technical problem that the current design of the pull rod limiting mechanism results in limited levels of pull rod extension and retraction adjustment, which cannot meet the needs of users of different heights and leads to reduced user comfort.

[0005] To achieve the above objectives, the present invention proposes a limiting component for limiting the displacement between a movable component and a fixed component, the limiting component comprising:

[0006] A bracket is fixedly connected to the movable component and movably disposed inside the fixed component. The bracket has a cavity and a limiting hole communicating with the cavity, and a limiting member is movably disposed in the limiting hole.

[0007] The drive block is movably disposed within the cavity; and

[0008] An elastic element is driven to the drive block to cause the drive block to move from an unlocked position to a locked position; in the locked position, the drive block abuts against the limiting element so that the limiting element is pressed against the inner wall of the fixing component; in the unlocked position, the drive block releases the limiting element so that the limiting element and the fixing component slide against each other.

[0009] The present invention also proposes a lever mechanism, comprising:

[0010] The fixed component is provided with a first movable cavity;

[0011] The movable component includes a driving end and a limiting end, the limiting end being movably disposed within the first movable cavity, and the driving end extending out of the fixing component; and

[0012] A limiting component, wherein the limiting component is connected to the limiting end;

[0013] The limiting component is the aforementioned limiting component.

[0014] The present invention also proposes a pull rod device, comprising a device body and a pull rod mechanism, wherein the device body is further provided with a movable wheel, and the pull rod mechanism is disposed on the device body, and the pull rod mechanism is the aforementioned pull rod mechanism. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of an embodiment of the limiting component provided by the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the limiting component provided by the present invention;

[0018] Figure 3 This is an exploded structural diagram of an embodiment of the limiting component provided by the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the bracket in an embodiment of the limiting component provided by the present invention;

[0020] Figure 5 A cross-sectional view of the bracket of the limiting component embodiment provided by the present invention;

[0021] Figure 6 This is a schematic diagram of the fixing component in an embodiment of the tie rod mechanism provided by the present invention;

[0022] Figure 7 An exploded view of the fixing component of an embodiment of the tie rod mechanism provided by the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the movable component in an embodiment of the tie rod mechanism provided by the present invention;

[0024] Figure 9 An exploded view of the active component of an embodiment of the tie rod mechanism provided by the present invention;

[0025] Figure 10 This is a partial cross-sectional view of the movable component of an embodiment of the tie rod mechanism provided by the present invention;

[0026] Figure 11 This is a schematic diagram of the structure of an embodiment of the pull rod device provided by the present invention;

[0027] Figure 12 This is a schematic diagram of the extended movable component of the pull rod mechanism in an embodiment of the pull rod device provided by the present invention.

[0028] Explanation of icon numbers:

[0029] 100, bracket; 110, limiting hole; 120, first connecting piece; 130, second connecting piece; 140, partition plate; 141, elongated hole; 142, clearance hole; 200, limiting piece; 300, driving block; 310, driving surface; 400, elastic element; 500, synchronizer; 510, gear; 520, rack; 600, pressing rod;

[0030] 10. Fixed component; 11. Outer tube; 12. Fixing bracket; 20. Movable component; 21. Inner tube; 22. Tie rod; 23. Transmission rod; 24. Support component; 25. Reset component; 26. Button; 27. Decorative cover; 28. Connecting post; 30. Limiting component;

[0031] 1. Device body; 2. Pull rod mechanism; 3. Moving wheels.

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] In current technology, most adjustable telescopic rods have a few pre-set levels, and the adjustment only stops when a specific position is reached, limiting the range of adjustment. For example, most telescopic rods on the market currently use a method where a hole is drilled in the fixed tube of the rod, and a movable pin is inserted into the hole to fix the telescopic length; or a rack is installed inside the fixed tube of the rod, with the movable rod and movable teeth forming a locking mechanism to achieve the telescopic function. This essentially cannot achieve truly stepless telescopic adjustment, and the movable pin and movable teeth may produce vibrations. Furthermore, this design cannot meet the needs of users of different heights, causing some users to bend their arms or adjust their posture during use, resulting in discomfort and reduced carrying comfort.

[0037] This invention proposes a limiting component.

[0038] Please see Figures 1 to 5 As shown, in one embodiment of the present invention, the limiting component is used to limit the displacement between the movable component and the fixed component. The limiting component includes: a bracket 100, a driving block 300, and an elastic member 400. The bracket 100 is fixedly connected to the movable component 20 and movably disposed inside the fixed component 10. The bracket 100 has a cavity and a limiting hole 110 communicating with the cavity. The limiting member 200 is movably disposed in the limiting hole 110. The driving block 300 is movably disposed in the cavity. The elastic member 400 is drivenly connected to the driving block 300 to drive the driving block 300 to have a tendency to move from the unlocked position to the locked position. In the locked position, the driving block 300 abuts against the limiting member 200 so that the limiting member 200 is pressed against the inner wall of the fixed component 10. In the unlocked position, the driving block 300 releases the limiting member 200 so that the limiting member 200 and the fixed component 10 slide against each other.

[0039] It should be noted that the movable component 20 is movably connected to the fixed component 10, and the movable component 20 moves along the fixed component 10. For example, the movable component 20 can be configured as an inner tube 21, and the fixed component 10 can be configured as an outer tube 11. The inner tube 21 is connected to the limiting component and slidably connected inside the outer tube 11. The limiting component is used to limit the displacement of the inner tube 21 inside the outer tube 11, so that the inner tube 21 can stop and be limited at any position inside the outer tube 11. In this way, the length of the inner tube 21 extending out of the outer tube 11 can be adjusted to meet the needs of different users.

[0040] In this embodiment, the bracket 100 of the limiting component is fixedly connected to the movable component 20, such as by adhesive bonding or screw fastening, which is not limited here. The bracket 100 and the movable component 20 are movably disposed inside the fixed component 10 and slide along the fixed component 10, thereby enabling the movable component 20 to extend and retract in conjunction with the fixed component 10. Specifically, the bracket 100 has cavities at both ends communicating with the outside, and a limiting hole 110 is formed on the side wall of the bracket 100. The limiting hole 110 communicates with the cavity and extends to the edge of the bracket 100. The limiting member 200 is located inside the limiting hole 110 and can move relative to the limiting hole 110. The driving block 300 is movably connected to the cavity and moves vertically within the cavity. The elastic element 400 is driven to the drive block 300. The elastic element 400, relying on its own elastic force, tends to move the drive block 300 from the unlocked position to the locked position, thereby locking and holding the drive block 300 in the locked position. The elastic element 400 can use its stretching or contracting elastic force to move the drive block and hold it in the locked position. It is understood that applying a force opposite to that of the elastic element 400 to the drive block 300 can drive the drive block 300 from the locked position to the unlocked position, thus unlocking it. The bracket 100 and the limiting element 200 can slide along the inner wall of the fixed assembly 10, further enabling the telescopic adjustment of the movable assembly 20.

[0041] In the locked position, the side wall of the drive block 300 contacts and presses against the limiting member 200. Simultaneously, the limiting member 200 is pressed against by the drive block 300, causing it to press against the inner wall of the fixed assembly 10. The limiting member 200 is fixed between the drive block 300 and the fixed assembly 10, thus restricting the movement of the bracket 100, and consequently restricting the movement of the movable assembly 20. It is understood that in specific implementations, the locked position can be any position within the fixed assembly 10. The elastic member 400 can drive the drive block 300 to press the limiting member 200 against the inner wall of the fixed assembly 10 from any position within the fixed assembly 10, thus avoiding positional limitations and achieving stepless adjustment. When unlocking is required, i.e., moving from the locked position to the unlocked position, a force resisting the elastic member 400 is applied to the drive block 300, making unlocking convenient.

[0042] The technical solution of this invention employs a driving component and a limiting component 200 in cooperation. In the locked position, the driving component abuts against the limiting component 200, causing the limiting component 200 to press against the inner wall of the fixing component 10, thus restricting the movement of the bracket 100. In the unlocked position, the driving component releases the limiting component 200, allowing the limiting component 200 and the fixing component 10 to slide against each other, thereby enabling the bracket 100 to slide within the fixing component 10. Specifically, the bracket 100 has a cavity and a limiting hole 110. The driving block 300 is movably disposed in the cavity, and the limiting component 200 is movably disposed in the limiting hole 110. The elastic component 400 is used to drive the driving block 300 from the unlocked position to the locked position. Applying a force opposite to that of the elastic component 400 can cause the driving block 300 to move from the locked position to the unlocked position. Unlocking and locking can be achieved through the cooperation of the drive component and the limit component 200. The bracket 100 is also connected to the movable component 20. In this way, the bracket 100 and the movable component 20 can be locked and unlocked at any position within the fixed component 10, thereby achieving stepless adjustment to meet the needs of different users and improve user comfort.

[0043] In one embodiment, the outer wall of the drive block 300 is provided with a drive surface 310, which is used to contact the limiting member 200. In this embodiment, during the process of the elastic member 400 driving the drive block 300 to move to the locked position, the drive block 300 gradually contacts and squeezes the limiting member 200 using the drive surface 310 of the outer wall, so that the limiting member 200 presses against the inner wall of the fixing assembly 10 to achieve locking. During the process of the drive block 300 moving towards the unlocked position, the drive surface 310 gradually relaxes and moves away from the limiting member 200 to release the pressure applied to the limiting member 200, thereby allowing the limiting member 200 to slide along the inner wall of the fixing assembly 10 to achieve unlocking.

[0044] In the specific implementation process, the driving surface 310 is configured as an inclined surface or a conical surface. When the driving surface 310 is configured as an inclined surface, in the movement direction from the unlock position to the locked position, the extension direction of the inclined surface is inclined towards the direction close to the central axis of the driving block 300. When the driving surface 310 is configured as a conical surface, in the movement direction from the unlock position to the locked position, the generatrix of the conical surface is inclined towards the direction close to the central axis of the driving block 300.

[0045] When the driving surface 310 is an inclined surface, in this embodiment, the side wall of the driving block 300 is provided with an inclined surface. The driving block 300 moves along the central axis direction within the cavity of the bracket 100, that is, the driving block 300 moves in the vertical direction, causing the inclined surface to press against or release the limiting member 200 during the movement. In specific implementation, as the driving block 300 moves from the unlocked position to the locked position, the extension direction of the inclined surface gradually approaches the central axis of the driving block 300.

[0046] When the driving surface 310 is a conical surface, in this embodiment, the side wall of the driving block 300 is provided with a conical surface, or the entire side wall of the driving block 300 is a conical surface. Of course, the driving block 300 can also be configured as a cone, and the generatrix of the conical surface gradually approaches the central axis of the driving block 300 in the direction of movement from the unlocked position to the locked position.

[0047] In one embodiment, the limiting member 200 is configured as a sphere. During implementation, the driving block 300 moves up and down within the cavity, and the limiting member 200 contacts the side wall of the driving block 300 and the inner wall of the fixing component 10. Furthermore, when the bracket 100 slides inside the fixing component 10, the limiting member 200 may also slide along the inner wall of the fixing component 10. By defining the limiting member 200 as a sphere, the sliding friction between the limiting member 200 and the inner wall of the fixing component 10, as well as the sliding friction between the driving member and the limiting member 200, can be transformed into rolling friction, reducing frictional force. It is understood that the spherical limiting member 200 has high strength and can withstand a certain amount of compressive force. Additionally, in specific implementations, to ensure the strength of the limiting member 200, a steel ball is used.

[0048] In the specific implementation process, the bracket 100 is provided with multiple limiting holes 110, and the limiting holes 110 are set one-to-one with the limiting members 200. The multiple limiting holes 110 are set at intervals along the outer periphery of the bracket 100.

[0049] Specifically, each limiting hole 110 has a movable limiting element 200. Understandably, the outer wall of the drive block 300 is provided with a corresponding inclined or conical surface to cooperate in pressing the limiting element 200. Multiple limiting elements 200 ensure that the locking force of the drive block 300 in the locked position is uniform and not eccentric, maintaining the balance and stability of the drive block 300, preventing tilting that would affect locking and unlocking, and also improving the locking strength and effectiveness.

[0050] In one embodiment, the limiting component further includes a synchronizer 500, two sets of drive blocks 300 are symmetrically arranged, the synchronizer 500 is connected to the two sets of drive blocks 300 respectively, so that the two sets of drive blocks 300 are close to each other or far from each other, and the two ends of the elastic member 400 are connected to the two sets of drive blocks 300 respectively.

[0051] refer to Figure 1As shown, two sets of drive blocks 300 are arranged vertically opposite each other and symmetrical about the horizontal direction. One end of the elastic element 400 is connected to one of the drive blocks, and the other end is connected to the other drive block. Thus, the elastic element 400 can drive the two drive blocks 300 to move synchronously, and the synchronous movement of the two drive blocks 300 compresses the limiting element 200 to achieve bidirectional self-locking. When this limiting component is applied to the lever mechanism of a speaker or other products that generate vibration or sound, the bidirectional self-locking limiting component can prevent the vibration from causing the drive blocks 300 to move and affecting the unlocking state and effect. Furthermore, when in the locked position, the drive blocks 300, the limiting element 200, and the fixing component 10 are in a compressed state, which can prevent noise generation, such as preventing vibration when the speaker plays sound. Additionally, it can be understood that the two drive blocks 300 can also move synchronously to move the drive surface away, releasing the compressive force on the limiting element 200 and achieving unlocking.

[0052] It should be noted that in the current locking point and hole matching structure, if the locking point is to be inserted into different holes, there is a gap between the locking point and the inner wall of the hole. When the product vibrates or makes noise, the locking point and the hole vibrate and produce noise. In the technical solution of this invention, the locking function of the limiting component is achieved by the driving block 300, the limiting member 200 and the fixing component 10. Specifically, the elastic member 400 drives the driving block 300 to move by its own elastic force. The driving block 300 presses the limiting member 200 through the driving surface 310, so that the limiting member 200 is pressed against the fixing component 10 to achieve locking and limiting. Compared with the current locking point and hole matching structure, this technical solution achieves limiting by compression locking. In addition, the driving block 300, the limiting member 200 and the fixing component 10 are in a compressed state, which can avoid the risk of vibration when the product plays audio.

[0053] In the specific implementation process, the elastic element 400 is a spring, and the driving block 300 has a protruding positioning post. The two ends of the spring are respectively sleeved on the corresponding positioning posts to play a positioning and guiding role, so as to avoid the spring being misaligned and affecting the locking effect. The spring is located between the upper and lower driving blocks 300, and the part of the spring near the end is sleeved on the positioning post. The extension of the spring drives the upper driving block 300 to have an upward tendency and drives the lower driving block 300 to have a downward tendency. In this way, the driving surfaces of the two driving blocks 300 respectively press the corresponding limiting element 200 and press it tightly onto the fixing component 10, thereby realizing the compression locking limit.

[0054] Synchronizer 500 is used to drive the two drive blocks 300 closer together or further apart. Specifically, when a driving force is applied, such as pressing the upper drive block 300, the elastic element 400 is compressed. Under the action of synchronizer 500, the two drive blocks 300 move closer to each other, and the driving surface 310 gradually moves away from the limiting member 200, gradually releasing the pressure on the limiting member 200, thereby unlocking. When the driving force applied to the drive blocks 300 is released, the elastic element 400 stretches due to its own elasticity, thereby driving the two drive blocks 300 to move away from each other, and the driving surface 310 gradually approaches and presses against the limiting member 200, causing the limiting member 200 to press against the inner wall of the fixing assembly 10, thereby locking. To improve the stability of the movement of the two drive blocks 300, two elastic elements 400 are provided between the two drive blocks 300. Additionally, it should be noted that the synchronizer 500 serves to drive the lower drive block 300 and the upper drive block 300 to move synchronously. It can be a trigger-type motor assembly that drives the lower drive component to move, or it can be a cross hinge structure or other synchronization structure, which is not limited here.

[0055] Furthermore, the synchronizer 500 includes a gear 510 and two racks 520. The two racks 520 are respectively meshed with the gear 510 and are located on both sides of the gear 510. The gear 510 is rotatably connected to the bracket 100. The two racks 520 are respectively connected to two sets of drive blocks 300.

[0056] refer to Figure 5 As shown, in this embodiment, a partition 140 is provided in the cavity, and two sets of driving blocks 300 are respectively located on both sides of the partition 140. The partition 140 has a clearance hole 142, wherein the elastic member 400 passes through the clearance hole 142 of the partition 140 and connects to the two driving blocks 300 respectively. The partition 140 also has an elongated hole 141 that extends through the partition 140. The gear 510 is rotatably connected in the elongated hole 141 and rotatably connected to the partition 140. Two racks 520 are respectively meshed on both sides of the gear 510. The two racks 520 move in opposite directions and are respectively connected to the corresponding drive blocks 300. Thus, when a driving force that resists the elastic force of the elastic member 400 is applied to one of the drive blocks 300, such as when the upper drive block 300 is pressed, the rack 520 connected to the upper drive block 300 drives the meshing gear 510 to rotate. The rotation of the gear 510 causes the rack 520 connected to the lower drive block 300 to move upward, thereby driving the lower drive block 300 to move upward and approach the upper drive block 300.

[0057] In one embodiment, the limiting component further includes a pressing rod 600, one end of which is movably disposed in the cavity and used to drive the driving block 300 to move in the opposite direction and compress the elastic member 400, so that the outer wall of the driving block 300 leaves the limiting member 200, thereby relieving the pressure of the driving block 300 on the limiting member 200.

[0058] In practical implementation, the limiting component is connected to the movable component 20 and slides inside the fixed component 10, which may make it inconvenient to directly contact the drive block 300 and apply pressure to it. In this embodiment, a pressing rod 600 is movably disposed within the cavity to press the drive block 300 to move. Specifically, the pressing rod 600 is located above the drive block 300, and pressing the drive block 300 to move it from the locked position to the unlocked position unlocks it. In practical implementation, the pressing rod 600 is made of fiberglass, which is lightweight, high-strength, and corrosion-resistant, ensuring good strength even after multiple pressing adjustments and improving product performance.

[0059] In one embodiment, the limiting component further includes a first connector 120, which is connected to the bracket 100 and used to connect the movable component 20. To facilitate the connection between the bracket 100 and the movable component 20, the first connector 120 is threaded to one end of the bracket 100, and the other end of the first connector is fixedly connected to the movable component 20, such as by adhesive bonding or screw fastening. Specifically, both ends of the first connector 120 are in communication with the outside, with one end detachably connected to the bracket 100 and the other end fixedly connected to the movable component 20, facilitating the installation of the bracket 100. Additionally, the pressing rod 600 passes through the first connector 120 and contacts the driving block 300 to move.

[0060] Furthermore, the limiting assembly also includes a second connector 130, which is connected to the bracket 100 and used to seal the tail end of the bracket 100. The second connector 130 is used to seal the bottom of the bracket 100 to ensure that other components within the cavity are not interfered with. Specifically, the second connector 130 is threadedly connected to the bracket 100 for easy assembly and disassembly.

[0061] refer to Figures 6 to 10As shown, the present invention also proposes a pull rod mechanism, which includes a limiting component 30. The specific structure of the limiting component 30 is as described in the above embodiments. Since this pull rod mechanism 2 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The pull rod mechanism 2 also includes a fixing component 10 and a movable component 20. The fixing component 10 is provided with a first movable cavity; the movable component 20 includes a driving end and a limiting end, the limiting end is movably disposed in the first movable cavity, and the driving end extends out of the fixing component 10; the limiting component 30 is connected to the limiting end.

[0062] In this embodiment, the limiting end of the movable component 20 is connected to the limiting component 30 and slides up and down along the first sliding cavity to adjust the position of the drive end extending out of the movable component 20, thereby allowing the lever mechanism 2 to adapt to the needs of different users. The limiting component 30 is used to fix the position of the movable component 20 in the fixed component 10, locking the movable component 20 in a suitable position within the fixed component 10. Driving the limiting component 30 to unlock facilitates adjusting the position of the movable component 20 in the fixed component 10 or retracting the movable component 20 for storage.

[0063] refer to Figures 8 to 10 As shown, in one embodiment, the movable component 20 includes an inner tube 21, a pull rod 22, and a transmission rod 23. The pull rod 22 is located at one end of the inner tube 21 away from the limiting component 30. The inner tube 21 is provided with a second movable cavity. The pressing rod 600 of the limiting component 30 is movably located in the second movable cavity, and the pressing rod 600 is connected to the transmission rod 23.

[0064] It should be noted that the pull rod 22 is fixed to the inner rod by a screw. Specifically, the inner wall of the second movable cavity of the inner tube 21 is provided with a connecting post 28, which extends along the axial direction of the inner tube 21. The screw passes through the pull rod 22 and is locked onto the connecting post 28. Furthermore, there are two connecting posts 28, which are symmetrically arranged to improve the strength of the connection between the inner tube 21 and the pull rod 22.

[0065] In this embodiment, a pull rod 22 is installed at one end of the inner tube 21, forming the driving end of the movable component 20. A limiting component 30 is installed at the other end of the inner tube 21, forming the limiting end of the movable component 20. The first connecting member 120 of the limiting component 30 is inserted into the second movable cavity of the inner tube 21 and fixedly connected to the inner tube 21, such as by applying anaerobic adhesive or fixing with screws. A transmission rod 23 is movably disposed in the cavity of the pull rod 22, and the transmission rod 23 is also connected to a pressing rod 600. By driving the transmission rod 23 to move within the cavity of the pull rod 22, the pull rod 22 is further driven to move, thereby driving the driving block 300 of the limiting component 30 to move and thus unlocking. Specifically, the inner tube 21 is provided with a second movable cavity, which is connected to the bracket 100 of the limiting component 30. The pressing rod 600 is in the second movable cavity and extends into the cavity of the bracket 100, facilitating the movement of the driving block 300 and thus facilitating the unlocking of the limiting component 30.

[0066] In one embodiment, the movable component 20 further includes a reset member 25, which is connected to the pull rod 22 and the transmission rod 23 respectively, and is used to drive the transmission rod 23 to reset.

[0067] In practice, pressing the transmission rod 23 causes the pressing rod 600 to move, thereby unlocking the driving block 300. The reset element 25 is used to reset the transmission rod 23. Specifically, the reset element 25 is a spring and is connected to both the transmission rod 23 and the pull rod 22. A limit screw passes through the transmission rod 23 and is locked onto the pull rod 22. The limit screw is also slidably connected to the transmission rod 23, and the reset element 25 is sleeved outside the limit screw. Thus, pressing the transmission rod 23 compresses the reset element 25; releasing the pressing force causes the reset element 25 to reset the transmission rod 23.

[0068] Furthermore, the transmission rod 23 is equipped with a button 26, and the pull rod 22 is connected to a decorative cover 27, with the button 26 extending out of the decorative cover 27. Specifically, the decorative cover 27 is installed on the pull rod 22 and is used to enclose the cavity of the pull rod 22, and to movably enclose the transmission rod 23 within the cavity, improving the aesthetics of the pull rod 22. The decorative cover 27 has an allowance opening, and the button 26 protrudes from the surface of the pull rod 22 and extends out of the cavity of the pull rod 22 from the allowance opening. Pressing the button 26 can drive the transmission rod 23 to move, thereby achieving the unlocking operation through the pressing rod 600 and the driving block 300.

[0069] In one embodiment, a support member 24 is provided within the second movable cavity. The support member 24 is sleeved on the pressing rod 600 and is slidably connected to the inner wall of the second movable cavity to guide and position the pressing rod 600. It should be noted that the support member 24 is also slidably connected to the connecting post 28. The support member 24 is provided with a clearance groove, and the connecting post 28 is located within the clearance groove. The two connecting posts 28 can also restrict the circumferential rotation of the support member 24, improving its stability. Furthermore, in specific implementations, the support member 24 is made of flexible materials such as silicone or rubber. During the movement of the pull rod 22 or the pressing rod 600, the support member 24 can absorb the vibrations and noise generated during the movement, thus playing a role in shock absorption and noise reduction.

[0070] Furthermore, multiple support members 24 are provided, and the multiple support members 24 are spaced apart along the extension direction of the pressing rod 600 to further improve the effect of shock absorption and noise reduction.

[0071] refer to Figures 6 to 7 As shown, in one embodiment, the fixing component 10 includes an outer tube 11 and a fixing frame 12. A first movable cavity is disposed in the outer tube 11, and the fixing frame 12 is fixedly disposed at one end of the outer tube 11. The fixing frame 12 has a through hole corresponding to and communicating with the first movable cavity, and the inner tube 21 is slidably connected to the through hole.

[0072] A first movable cavity is formed inside the outer tube 11. The inner tube 21 and the limiting component 30 slide within the first movable cavity. In the locked position, the limiting member 200 of the limiting component 30 presses against the inner wall of the first movable cavity to achieve positioning. In the unlocked position, the limiting member 200 rolls or slides along the inner wall of the first movable cavity. The fixing bracket 12 is fixedly connected to one end of the outer tube 11, and the through hole of the fixing bracket 12 corresponds to the first movable cavity. The driving end of the movable component 20 extends out of the first movable cavity from the through hole. It can be understood that the limiting component 30 is used to adjust the length of the movable component 20 extending out of the first movable cavity and lock it in a suitable position. The extension and retraction degree of the movable component 20 can be adjusted to meet the needs of different users.

[0073] In one embodiment, the inner tube 21 and the outer tube 11 are provided in two sets respectively. The two sets of inner tubes 21 are respectively provided at both ends of the pull rod 22, and the two sets of outer tubes 11 are respectively provided at both ends of the fixing frame 12. The two sets of inner tubes 21 and the two sets of outer tubes 11 are respectively provided in corresponding order.

[0074] It should be noted that two sets of limiting components 30 are provided, each corresponding to an inner tube 21. Specifically, the two sets of inner tubes 21 are installed near both ends of the pull rod 22, and the two sets of outer tubes 11 are installed near both ends of the fixing frame 12. One inner tube 21 cooperates with one outer tube 11 to improve the strength of the pull rod mechanism 2. The two limiting components 30 are synchronously unlocked by a transmission rod 23 to adjust the degree of extension and retraction of the movable component 20 relative to the fixed component 10.

[0075] refer to Figures 11 to 12 As shown, the present invention also proposes a pull rod device, which includes a device body 1 and a pull rod mechanism 2. The specific structure of the pull rod mechanism 2 is as described in the above embodiments. Since this pull rod device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The device body 1 is also provided with a movable wheel 3, and the pull rod mechanism 2 is disposed on the device body 1.

[0076] In the specific implementation, the bottom of the pull rod device is equipped with movable wheels 3, and the fixing component 10 of the pull rod mechanism 2 is installed inside the device body 1 and extends out of the top of the device body 1. Specifically, the fixing bracket 12 of the fixing component 10 is fixed to the top of the device body 1 by screws, and decorative pieces are also provided at the screw positions to ensure aesthetic appearance. The movable component 20 extends out of the fixing component 10, and the length of the movable component 20 extending out of the fixing component 10 can be adjusted to accommodate different users pulling the device body 1 by the pull rod 22 component, making it easy to carry the device body 1. The device body 1 can be a box structure, a cloth strap structure, or an electronic product such as a speaker, and is not limited in this embodiment.

[0077] In one embodiment, the device body 1 is configured as a speaker. The speaker can be moved by a pull rod mechanism 2, facilitating its portability. The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the inventive concept of the present invention and the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A limiting component, characterized in that, The limiting component is used to limit the displacement between the moving component and the fixed component, and includes: A bracket is fixedly connected to the movable component and movably disposed inside the fixed component. The bracket has a cavity and a limiting hole communicating with the cavity, and a limiting member is movably disposed in the limiting hole. The drive block is movably disposed within the cavity; and An elastic element is driven to the drive block to cause the drive block to move from an unlocked position to a locked position; in the locked position, the drive block abuts against the limiting element so that the limiting element is pressed against the inner wall of the fixing component; in the unlocked position, the drive block releases the limiting element so that the limiting element and the fixing component slide against each other.

2. The limiting component as described in claim 1, characterized in that, The outer wall of the drive block is provided with a drive surface, which is used to contact the limiting member.

3. The limiting component as described in claim 2, characterized in that, The driving surface is configured as an inclined surface or a conical surface. When the driving surface is configured as an inclined surface, in the direction of movement from the unlocked position to the locked position, the extension direction of the inclined surface is inclined towards the central axis of the driving block. When the driving surface is configured as a conical surface, in the direction of movement from the unlocked position to the locked position, the generatrix of the conical surface is inclined towards the central axis of the driving block; and / or, The drive block is configured as a cone; and / or, The limiting component is configured as a sphere.

4. The limiting component as described in claim 3, characterized in that, The bracket is provided with multiple limiting holes, and each limiting hole corresponds to a limiting member. The multiple limiting holes are spaced apart along the outer periphery of the bracket.

5. The limiting component as described in any one of claims 1-4, characterized in that, The limiting component also includes a synchronizer. The driving blocks are symmetrically arranged in two sets. The synchronizer is connected to the two sets of driving blocks respectively, so that the two sets of driving blocks are close to each other or far apart. The two ends of the elastic member are connected to the two sets of driving blocks respectively.

6. The limiting component as described in claim 5, characterized in that, The synchronizer includes a gear and two racks. The two racks are respectively meshed with the gear and located on both sides of the gear. The gear is rotatably connected to the bracket. The two racks are respectively connected to two sets of drive blocks.

7. The limiting component as described in claim 1, characterized in that, The limiting component also includes a pressing rod, one end of which is movably disposed in the cavity and used to drive the driving block to move in the opposite direction to compress the elastic member, so that the outer wall of the driving block leaves the limiting member, thereby relieving the pressure of the driving block on the limiting member.

8. The limiting component as described in claim 1, characterized in that, The limiting component further includes a first connector, which is connected to the bracket and used to connect the movable component; And / or, the limiting component further includes a second connector, which is connected to the bracket and used to seal the tail end of the bracket.

9. A tie rod mechanism, characterized in that, include: The fixed component is provided with a first movable cavity; The movable component includes a driving end and a limiting end, wherein the limiting end is movably disposed within the first movable cavity, and the driving end extends out of the fixed component; as well as A limiting component, wherein the limiting component is connected to the limiting end; Wherein, the limiting component is the limiting component as described in any one of claims 1-8.

10. The tie rod mechanism as described in claim 9, characterized in that, The movable component includes an inner tube, a pull rod, and a transmission rod. The pull rod is located at one end of the inner tube away from the limiting component. The inner tube has a second movable cavity. The pressing rod of the limiting component is movably located in the second movable cavity, and the pressing rod is connected to the transmission rod.

11. The tie rod mechanism as described in claim 10, characterized in that, The second movable cavity is provided with a support member, which is sleeved on the pressing rod and is slidably connected to the inner wall of the second movable cavity.

12. The tie rod mechanism as described in claim 10, characterized in that, The active component also includes a reset element, which is connected to the pull rod and the transmission rod respectively, and is used to drive the transmission rod to reset.

13. The tie rod mechanism as described in claim 12, characterized in that, The transmission rod is equipped with a button, the pull rod is connected to a decorative cover, and the button extends out of the decorative cover.

14. The tie rod mechanism as described in claim 10, characterized in that, The fixing assembly includes an outer tube and a fixing frame. The first movable cavity is disposed in the outer tube, and the fixing frame is fixedly disposed at one end of the outer tube. The fixing frame has a through hole corresponding to and communicating with the first movable cavity, and the inner tube is slidably connected to the through hole.

15. The tie rod mechanism as described in claim 14, characterized in that, The inner tube and the outer tube are provided in two sets respectively. The two sets of inner tubes are respectively located at both ends of the pull rod, and the two sets of outer tubes are respectively located at both ends of the fixing frame. The two sets of inner tubes and the two sets of outer tubes are respectively arranged correspondingly.

16. A pull rod device, characterized in that, The device includes a device body and a pull rod mechanism, wherein the device body is further provided with a moving wheel, and the pull rod mechanism is disposed on the device body, and the pull rod mechanism is the pull rod mechanism as described in any one of claims 9-15.

17. The pull rod device as claimed in claim 16, characterized in that, The device itself is configured as a speaker.

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