Telescopic locking mechanism

Abstract

The utility model relates to the technical field of mechanical structures, and discloses a telescopic locking mechanism which comprises a telescopic rod and a locking structure, and the telescopic rod comprises an outer sleeve rod and an inner shrinkage rod; the locking structure comprises a supporting body and a locking assembly. Wherein the supporting main body is fixedly arranged on the outer sleeve rod, the supporting main body comprises a guide part which gradually shrinks towards the inner shrinkage rod, and the locking assembly moves in the direction close to the inner shrinkage rod along the guide part so as to abut against the inner shrinkage rod to enable the telescopic rod to be in a locked state. Or the locking assembly moves in the direction far away from the inner shrinkage rod along the guide part to release the inner shrinkage rod, so that the telescopic rod is in an unlocked state. The telescopic locking mechanism is simple in overall structure, convenient to operate, stable and reliable in locking effect and not prone to losing efficacy, and the problems that in the prior art, a telescopic locking mechanism for conducting locking by rotating a wrench to extrude a spring is complex in structure and prone to aging and losing efficacy, and the locking effect is affected are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structures, in particular to a telescopic locking mechanism. Background Art

[0002] A telescopic rod is a common mechanical structure that can adjust the length by telescoping. Existing telescopic rods are usually used in conjunction with a telescopic locking mechanism, which locks and fixes the position of the telescopic rod to keep it at different lengths. Most of the telescopic locking mechanisms in the prior art lock the rod by squeezing a spring by turning a wrench, and the structure is relatively complex. In addition, the spring is prone to aging and failure after long-term use, which affects the locking effect. Utility Model Content

[0003] In view of this, the utility model provides a telescopic locking mechanism to solve the problem that the telescopic locking mechanism in the prior art is locked by squeezing a spring by rotating a wrench, has a complex structure, is prone to aging and failure, and affects the locking effect.

[0004] The utility model provides a telescopic locking mechanism, comprising:

[0005] The telescopic rod comprises an outer rod and an inner retractable rod which is slidably sleeved inside the outer rod along the length direction of the outer rod;

[0006] The locking structure includes a supporting body and a locking assembly; wherein the supporting body is fixedly arranged on the outer rod, and the supporting body includes a guiding portion which gradually shrinks toward the inner retracting rod, and the locking assembly moves along the guiding portion in a direction close to the inner retracting rod to press the inner retracting rod so that the telescopic rod is in a locked state, or the locking assembly moves along the guiding portion in a direction away from the inner retracting rod to release the inner retracting rod so that the telescopic rod is in an unlocked state.

[0007] Beneficial effect: The locking structure includes a supporting body and a locking assembly, and through a guide portion arranged on the supporting body and gradually shrinking toward the inner retracting rod, the locking assembly can move along the guide portion in a direction close to or away from the inner retracting rod, thereby realizing locking or releasing the telescopic rod. When the telescopic rod is in a locked state, the locking assembly applies an oblique pressing force to the telescopic rod, and the force can be decomposed into a locking force perpendicular to the inner retracting rod and an anti-slip force parallel to the inner retracting rod, thereby realizing stably locking and fixing the inner retracting rod in a set position, effectively preventing the inner retracting rod and the outer rod from sliding relative to each other, and the overall structure is relatively simple, the operation is relatively convenient, and the locking effect is stable and reliable, and not easy to fail. It effectively solves the problem in the prior art that the telescopic locking mechanism that locks by rotating a wrench to squeeze the spring is relatively complex in structure and prone to aging and failure, thereby affecting the locking effect.

[0008] In an optional embodiment, the retracted rod at least partially extends out of the outer rod, and the guide portion gradually shrinks toward the retracted rod located outside the outer rod.

[0009] Beneficial effect: The retracted rod includes a hidden section located inside the outer rod and an exposed section located outside the outer rod. The guide portion is configured to gradually tilt and shrink toward the exposed section located outside the outer rod, so that the locking assembly can be guided to press against the retracted rod without opening a hole in the outer rod. The locking assembly can directly press against the outer peripheral wall of the exposed section of the retracted rod, thereby preventing the exposed section from extending outward or shrinking inward, thereby locking the position of the retracted rod.

[0010] In an optional embodiment, the support body further includes a sleeve portion, which is sleeved at the junction of the outer rod and the retracted rod and is clamped and fixed with the outer rod, and the guide portion is arranged on the sleeve portion.

[0011] Beneficial effect: The support body is provided with a sleeve portion, and the sleeve portion is sleeved at the junction of the outer rod and the inner retracted rod. On the one hand, it can hide the intersection marks of the outer rod and the inner retracted rod to improve the aesthetics. On the other hand, the intersection position is also more convenient for the arrangement of the guide part. In addition, the sleeve portion is fixed to the outer rod by a clamping method, and disassembly and assembly are more convenient and quick.

[0012] In an optional embodiment, the ferrule portion includes:

[0013] The first cylinder section is sleeved outside the outer rod and has an interference fit with the outer rod;

[0014] The second cylinder section is sleeved outside the inner retractable rod and has a clearance fit with the inner retractable rod;

[0015] The inner diameter of the first barrel section is greater than the inner diameter of the second barrel section. A limiting step is formed at the junction of the first barrel section and the second barrel section. The limiting step abuts against and limits the end wall of the outer sleeve.

[0016] Beneficial effect: The sleeve part is designed by adopting a first barrel section and a second barrel section with an inner diameter smaller than the first barrel section, wherein the first barrel section is interference-fitted outside the outer rod, and the first barrel section and the outer rod are tightly fitted to achieve fixation, and the limiting step formed at the junction of the first barrel section and the second barrel section can also abut against the end of the outer rod, which can further prevent the sleeve part from slipping and improve the stability, so that the entire sleeve part can be stably clamped and fixed on the outer rod, and in addition, the second barrel section and the retracted rod are clearance-fitted, so that the retracted rod can slide freely in the second barrel section when telescopically moving.

[0017] In an optional embodiment, the guide portion is a guide sleeve fixedly disposed on the clamping sleeve portion, and a central axis of the guide sleeve forms a set angle with a central axis of the clamping sleeve portion.

[0018] Beneficial effect: The guide part adopts a structural design of a guide sleeve fixedly arranged on the clamping sleeve part. Since the guide sleeve is circumferentially closed, the locking assembly is less likely to be separated from the guide part, and the guiding effect is stable and reliable. In addition, since the clamping sleeve part and the telescopic rod are coaxially arranged, the central axis of the guide sleeve and the central axis of the clamping sleeve part form a set angle, which can ensure that the guiding direction of the guide sleeve and the central axis of the inner retracting rod are also at a set angle, thereby ensuring that the guide sleeve can guide the locking assembly to move in a direction close to or away from the outer peripheral wall of the inner retracting rod to achieve locking or releasing the inner retracting rod.

[0019] In an optional embodiment, the guide portion is a guide surface that gradually shrinks toward the retracted rod.

[0020] Beneficial effect: The guide portion adopts a design of a guide surface that gradually shrinks toward the inwardly contracted rod, which has a good guiding effect and a simple structure.

[0021] In an optional embodiment, the support body further includes a hinge portion disposed away from the guide portion, and the support body and the locking assembly are hingedly connected via the hinge portion.

[0022] Beneficial effect: The hinged portion of the support body facilitates the connection between the support body and the locking assembly.

[0023] In an optional embodiment, the hinged portion is fixedly disposed on the outer wall of the sleeve portion of the support body, and the hinged portion includes two hinged plates disposed opposite to each other, and the two hinged plates are respectively provided with a first hinged hole suitable for hinged connection with the locking assembly.

[0024] Beneficial effects: The hinged part is fixed on the outer wall of the sleeve part, and the hinged part adopts two hinged plates arranged opposite to each other. One end of the locking assembly connected to the hinged part is placed in the two hinged plates. The overall structure is more compact. By connecting the first hinge holes and the locking assembly on the two hinged plates with pins, the hinged connection between the locking assembly and the supporting body can be achieved, and the connection is more stable and reliable.

[0025] In an optional embodiment, the locking assembly includes a driving member and a locking member movably connected to the driving member, the driving member is hinged to one end of the support body away from the guide portion, and the locking member is movably arranged in the guide portion, so that when the driving member approaches or moves away from the telescopic rod, the locking member is driven by the driving member to move along the guide portion in a direction close to the retracted rod to press the retracted rod to put the telescopic rod in a locked state, or the locking member is driven by the driving member to move along the guide portion in a direction away from the retracted rod to release the retracted rod to put the telescopic rod in an unlocked state.

[0026] Beneficial effect: The locking assembly adopts a structural design of a driving member and a locking member movably connected to the driving member, and the driving member is hinged to the supporting body, which ensures that the driving member can be driven to drive the locking member to move freely while preventing the locking assembly from being separated from the supporting body.

[0027] In an optional embodiment, the driving member includes a wrench and a transmission connecting member, the wrench is hinged to an end of the supporting body away from the guide portion, and the transmission connecting member is hinged to the wrench and the locking member respectively.

[0028] Beneficial effect: The transmission connection member can convert the rotational motion of the wrench into the reciprocating motion of the locking member along the length direction of the guide portion, so that the locking member can move telescopically along the guide portion to achieve pressing or releasing the retracted rod.

[0029] In an optional embodiment, the wrench comprises:

[0030] Grip part;

[0031] The connecting part has a first end fixedly connected to the gripping part, a second end hinged to an end of the supporting body away from the guiding part, and a first end of the connecting part hinged to the transmission connecting member.

[0032] Beneficial effects: The wrench adopts the design of a gripping part and a connecting part, wherein the gripping part can be set to an arc plate shape or a cylindrical shape, etc., thereby improving the user's gripping experience, and the design of the connecting part makes it easier to articulate the wrench with the transmission connector and the supporting body.

[0033] In an optional embodiment, the second end of the connecting part is provided with a second hinge hole suitable for being hinged to an end of the supporting body away from the guide part; the connecting part is also provided with a third hinge hole suitable for being hinged to the first end of the transmission connecting member, and the third hinge hole is located between the second hinge hole and the holding part.

[0034] In the above embodiment, one end of the connecting part is hinged to the supporting body through the second hinge hole, and the other end is provided with a grip for the user to hold, and the middle part is hinged to the transmission connecting part through the third hinge hole, so that when the entire wrench is driven to move by the grip, the locking part can be driven to move more easily.

[0035] In an optional embodiment, the transmission connection member includes an arc-shaped connecting rod, and two ends of the arc-shaped connecting rod are respectively hinged to the wrench and the locking member.

[0036] Beneficial effect: The transmission connection piece adopts the design of an arc-shaped connecting rod, so that the rotational motion of the wrench can be transmitted through the arc-shaped connecting rod and converted into the reciprocating motion of the locking piece.

[0037] In an optional embodiment, the locking member includes:

[0038] A locking rod, wherein a first end of the locking rod is hinged to the driving member, and a second end of the locking rod is configured as an abutment end adapted to abut against the retracted rod;

[0039] The guide part is provided with an opening for the abutting end to contact the inner retracted rod.

[0040] Beneficial effect: The locking member adopts the form of a locking rod, which has a simple structure and is easy to process and form. Through the opening arranged on the guide part corresponding to the abutting end of the locking rod, the locking rod can pass through the guide part to abut against the retracted rod, thereby pressing down and fixing the retracted rod.

[0041] In an optional embodiment, a side of the outer peripheral wall of the abutting end close to the retracted rod is cut into a flat surface;

[0042] Alternatively, a side of the outer peripheral wall of the abutting end close to the inner retracted rod is cut into an arc surface matching the outer peripheral wall of the inner retracted rod.

[0043] Beneficial effect: By cutting the side of the outer peripheral wall of the abutting end close to the retracted rod into a flat surface or an arc surface, the contact area between the abutting end and the retracted rod can be increased, the friction force can be increased, and the locking effect can be improved.

[0044] In an optional implementation, a protruding structure is provided on the plane or the curved surface.

[0045] Beneficial effect: By providing a raised structure at the end where the locking rod and the retracting rod act, the force-bearing area of ​​the contact between the locking rod and the retracting rod is reduced, thereby increasing the pressure applied by the locking rod on the retracting rod, making the locking rod more stable and less likely to slip when locking and fixing the retracting rod, thereby further improving the locking effect.

[0046] In an optional embodiment, the guide portion is a guide sleeve, and an opening is provided on the side of the guide sleeve facing the retracted rod. The locking rod moves along the guide sleeve through the opening to contact the retracted rod.

[0047] Beneficial effect: The opening provided on the guide sleeve facilitates the abutting end of the locking rod to extend out and abut against the retracted rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 It is a structural schematic diagram of the telescopic locking mechanism in the embodiment of the utility model in a locked state;

[0050] Figure 2 for Figure 1 A partial enlarged view of the middle locking structure;

[0051] Figure 3 for Figure 2 A front view of

[0052] Figure 4 for Figure 2 A cross-sectional view of

[0053] Figure 5 for Figure 1 Axonometric view of the locking knot in ;

[0054] Figure 6 for Figure 1 A schematic structural diagram of the locking structure in the embodiment of the present invention from a perspective close to one end of the second cylinder section;

[0055] Figure 7 for Figure 5 A front view of

[0056] Figure 8 It is a partial structural schematic diagram of the telescopic locking mechanism in the embodiment of the utility model in the unlocked state;

[0057] Fig. 9 for Figure 8 A front view of

[0058] Fig.10 for Figure 8 sectional view of .

[0059] Description of reference numerals:

[0060] 10. Telescopic rod; 11. Outer rod; 12. Inner retractable rod;

[0061] 20. Locking structure;

[0062] 21. Support the main body;

[0063] 211, guide portion; 2110, opening;

[0064] 212, ferrule portion; 2120, limiting step; 2121, first cylinder section; 2122, second cylinder section;

[0065] 213. Articulation

[0066] 22. Locking assembly;

[0067] 221, driving member; 2211, wrench; 22111, gripping portion; 22112, connecting portion; 2212, transmission connecting member;

[0068] 222, locking member; 2221, abutting end; 2222, protruding structure. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0070] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0073] Combine the following Figures 1 to 10 , describing an embodiment of the utility model.

[0074] According to an embodiment of the utility model, the utility model provides a telescopic locking mechanism, including a telescopic rod 10 and a locking structure 20, the telescopic rod 10 includes an outer rod 11 and an inner retracted rod 12 slidably sleeved in the outer rod 11 along the length direction of the outer rod 11; the locking structure 20 includes a support body 21 and a locking assembly 22; wherein the support body 21 is fixedly arranged on the outer rod 11, and the support body 21 includes a guide portion 211 that gradually shrinks toward the inner retracted rod 12, the locking assembly 22 moves along the guide portion 211 in a direction close to the inner retracted rod 12 to press the inner retracted rod 12 to put the telescopic rod 10 in a locked state, or the locking assembly 22 moves along the guide portion 211 in a direction away from the inner retracted rod 12 to release the inner retracted rod 12 to put the telescopic rod 10 in an unlocked state.

[0075] In the above embodiment, the locking structure 20 includes a supporting body 21 and a locking assembly 22, and through a guide portion 211 gradually shrinking toward the inner retracted rod 12 provided on the supporting body 21, the locking assembly 22 can move along the guide portion 211 in a direction close to or away from the inner retracted rod 12, thereby realizing locking or releasing the telescopic rod 10. When the telescopic rod 10 is in a locked state, the locking assembly 22 applies an oblique pressing force to the telescopic rod 10, and the force can be decomposed into a locking force perpendicular to the inner retracted rod 12 and an anti-slip force parallel to the inner retracted rod 12, thereby realizing that the inner retracted rod 12 can be stably locked and fixed in a set position, effectively preventing the inner retracted rod 12 and the outer rod 11 from sliding relative to each other, and the overall structure is relatively simple, the operation is relatively convenient, and the locking effect is stable and reliable, and it is not easy to fail, which effectively solves the problem that the telescopic locking mechanism in the prior art, which squeezes the spring to lock by rotating the wrench 2211, has a relatively complex structure and is prone to aging and failure, thereby affecting the locking effect.

[0076] Specifically, the outer rod 11 is a hollow cylindrical structure, one end of the inner rod 12 is movably limited in the outer rod 11, and the other end extends out of the outer rod 11 and is exposed, and the outer diameter of the inner rod 12 is smaller than the inner diameter of the outer rod 11, so that the inner rod 12 can be telescopically moved along the length direction of the outer rod 11, so that the rod body length of the telescopic rod 10 can be adjusted by controlling the telescopic movement of the inner rod 12 in the outer rod 11.

[0077] Furthermore, the support body 21 can be fixed on the outer rod 11 by means of snap connection, screws, interference fit, etc. The guide portion 211 gradually extends in an inclined direction toward the inner retracted rod 12 to guide the locking assembly 22 to move toward or away from the inner retracted rod 12, thereby achieving the pressing or releasing of the inner retracted rod 12.

[0078] It should be noted that, in the present embodiment, the “gradual contraction” of the guide portion 211 toward the retracted rod 12 refers to the outer peripheral wall of the retracted rod 12, and the vertical distance between the guide portion 211 and the outer peripheral wall of the retracted rod 12 in the radial direction of the retracted rod 12 gradually decreases from the end away from the retracted rod 12 to the end close to the retracted rod 12, so as to be in a contracted state.

[0079] In some embodiments, the retracted rod 12 at least partially extends out of the outer rod 11 , and the guide portion 211 gradually shrinks toward the retracted rod 12 located outside the outer rod 11 .

[0080] In the above embodiment, the retracted rod 12 includes a hidden section located inside the outer rod 11 and an exposed section located outside the outer rod 11. In one example, the guide portion 211 is configured to gradually tilt and shrink toward the hidden section located inside the outer rod 11 to guide the locking assembly 22 to press against the outer peripheral wall of the hidden section of the retracted rod 12. To this end, it is necessary to, for example, open a hole on the outer rod 11 so that the locking assembly 22 can extend from the outside of the outer rod 11 and then apply pressure to the retracted rod 12. In another example, in order to simplify the structure and allow the locking structure in the present application to be directly used without improving the telescopic rod 10, the guide portion 211 is configured to gradually tilt and shrink toward the exposed section located outside the outer rod 11 to guide the locking assembly 22 to press against the outer peripheral wall of the exposed section of the retracted rod 12, thereby preventing the exposed section from extending outward or shrinking inward, thereby locking the position of the retracted rod 12.

[0081] Specifically, in this embodiment, the guide portion 211 gradually shrinks in an inclined direction toward the outer peripheral wall of the retracted rod 12 from one end close to the hidden section of the retracted rod 12 to one end close to the exposed section of the retracted rod 12 .

[0082] In some embodiments, the support body 21 further includes a sleeve portion 212 , which is sleeved at the junction of the outer rod 11 and the retracted rod 12 and is clamped and fixed with the outer rod 11 , and the guide portion 211 is disposed on the sleeve portion 212 .

[0083] In the above embodiment, the support body 21 is supported by a sleeve portion 212, and the sleeve portion 212 is sleeved at the junction of the outer rod 11 and the inner retracted rod 12. On the one hand, it can hide the intersection marks between the outer rod 11 and the inner retracted rod 12 to improve the aesthetics. On the other hand, the intersection position is also more convenient for the arrangement of the guide portion 211. In addition, the sleeve portion 212 is fixed to the outer rod 11 by a snap-on method, which makes disassembly and assembly more convenient and quick.

[0084] Specifically, the sleeve portion 212 is cylindrical and is coaxially arranged with the inner retractable rod 12 and the outer rod 11. The sleeve portion 212 is sleeved at the intersection of the outer rod 11 and the inner retractable rod 12 and is clamped and fixed to the outer rod 11. The inner diameter of the sleeve portion 212 is larger than the outer diameter of the inner retractable rod 12 to ensure that the inner retractable rod 12 can be freely telescopically moved.

[0085] In some embodiments, the sleeve portion 212 includes a first barrel section 2121 and a second barrel section 2122. The first barrel section 2121 is sleeved on the outside of the outer rod 11 and has an interference fit with the outer rod 11; the second barrel section 2122 is sleeved on the outside of the retracted rod 12 and has a clearance fit with the retracted rod 12; the inner diameter of the first barrel section 2121 is larger than the inner diameter of the second barrel section 2122, and a limit step 2120 is formed at the junction of the first barrel section 2121 and the second barrel section 2122, and the limit step 2120 is pressed against the end wall of the outer rod 11 for limit.

[0086] In the above embodiment, the sleeve portion 212 is designed by adopting a first barrel section 2121 and a second barrel section 2122 whose inner diameter is smaller than that of the first barrel section 2121, wherein the first barrel section 2121 is interference fit outside the outer rod 11, and the first barrel section 2121 and the outer rod 11 are tightly fitted to achieve fixation, and the limiting step 2120 formed at the junction of the first barrel section 2121 and the second barrel section 2122 can also abut against the end of the outer rod 11, which can further prevent the sleeve portion 212 from slipping and improve the stability, so that the entire sleeve portion 212 can be stably clamped and fixed on the outer rod 11, and in addition, the second barrel section 2122 is clearance-fitted with the retracted rod 12, so that the retracted rod 12 can slide freely in the second barrel section 2122.

[0087] In some embodiments, the guide portion 211 is a guide sleeve fixedly disposed on the sleeve portion 212 , and the central axis of the guide sleeve forms a set angle with the central axis of the sleeve portion 212 .

[0088] In the above embodiment, the guide portion 211 adopts a structural design of a guide sleeve fixedly arranged on the clamping sleeve portion 212. Since the guide sleeve is circumferentially closed, the locking assembly 22 is less likely to be separated from the guide portion 211, and the guiding effect is stable and reliable. In addition, since the clamping sleeve portion 212 is coaxially arranged with the telescopic rod 10, the central axis of the guide sleeve and the central axis of the clamping sleeve portion 212 form a set angle, which can ensure that the guiding direction of the guide sleeve and the central axis of the inner retracting rod 12 also form a set angle, thereby ensuring that the guide sleeve can guide the locking assembly 22 to move in a direction close to or away from the outer peripheral wall of the inner retracting rod 12 to achieve locking or releasing the inner retracting rod 12.

[0089] Specifically, the guide sleeve is integrally formed with the ferrule portion 212, the guide sleeve is arranged on the outer wall of the ferrule portion 212, a part of the guide sleeve is fixed on the first barrel section 2121, and the other part is fixed on the second barrel section 2122. The angle between the central axis of the guide sleeve and the central axis of the ferrule portion 212 is less than 90°.

[0090] In some embodiments, the guide portion 211 is a guide surface that gradually shrinks toward the retracted rod 12 .

[0091] In the above embodiment, the guide portion 211 is designed with a guide surface that gradually shrinks toward the retracted rod 12, which has a good guiding effect and a simple structure.

[0092] In other alternative embodiments, the guide portion 211 may adopt a structural form such as a guide groove, a guide rail, etc., which is not limited in this embodiment.

[0093] In some embodiments, the support body 21 further includes a hinge portion 213 disposed away from the guide portion 211 , and the support body 21 and the locking assembly 22 are hingedly connected via the hinge portion 213 .

[0094] In the above embodiment, the support body 21 is provided with a hinge portion 213 to facilitate the connection between the support body 21 and the locking assembly 22 .

[0095] In some embodiments, the hinge portion 213 is fixedly disposed on the outer wall of the sleeve portion 212 of the support body 21 , and the hinge portion 213 includes two hinge plates disposed opposite to each other, each of which is provided with a first hinge hole suitable for hinged connection with the locking assembly 22 .

[0096] In the above embodiment, the hinged portion 213 is fixedly arranged on the outer wall of the sleeve portion 212, and the hinged portion 213 adopts two hinged plates arranged opposite to each other. The end of the locking assembly 22 connected to the hinged portion 213 is placed in the two hinged plates, and the overall structure is more compact. In one example, a hinge hole is provided on the locking assembly 22. By connecting the first hinge hole on the two hinged plates and the hinge hole on the locking assembly 22 with a pin, the hinge between the locking assembly 22 and the support body 21 can be realized, and the connection is more stable and reliable.

[0097] In some embodiments, the locking assembly 22 includes a driving member 221 and a locking member 222 movably connected to the driving member 221. The driving member 221 is hinged to one end of the support body 21 away from the guide portion 211, and the locking member 222 is movably arranged in the guide portion 211, so that when the driving member 221 approaches or moves away from the telescopic rod 10, the locking member 222 moves along the guide portion 211 in a direction close to the retracted rod 12 under the drive of the driving member 221 to press the retracted rod 12 to put the telescopic rod 10 in a locked state, or the locking member 222 moves along the guide portion 211 in a direction away from the retracted rod 12 under the drive of the driving member 221 to release the retracted rod 12 to put the telescopic rod 10 in an unlocked state.

[0098] In the above embodiment, the locking assembly 22 adopts a structural design of a driving member 221 and a locking member 222 movably connected to the driving member 221. The driving member 221 is hinged to the support body 21, while ensuring that the driving member 221 can be driven to drive the locking member 222 to move freely, while preventing the locking assembly 22 from being separated from the support body 21.

[0099] In some embodiments, the driving member 221 includes a wrench 2211 and a transmission connecting member 2212 . The wrench 2211 is hinged to one end of the supporting body 21 away from the guide portion 211 . The transmission connecting member 2212 is hinged to the wrench 2211 and the locking member 222 , respectively.

[0100] In the above embodiment, the transmission connection 2212 can convert the rotational movement of the wrench 2211 into the reciprocating movement of the locking member 222 along the length direction of the guide portion 211, so that the locking member 222 can move telescopically along the guide portion 211 to achieve pressing or releasing the retracted rod 12.

[0101] In some embodiments, the wrench 2211 includes a gripping portion 22111 and a connecting portion 22112, wherein the first end of the connecting portion 22112 is fixedly connected to the gripping portion 22111, the second end of the connecting portion 22112 is hinged to an end of the support body 21 away from the guide portion 211, and the connecting portion 22112 is hinged to the first end of the transmission connecting member 2212.

[0102] In the above embodiment, the wrench 2211 adopts the design of a gripping portion 22111 and a connecting portion 22112, wherein the gripping portion 22111 can be set to an arc-shaped plate or a cylindrical shape, etc., to improve the user's gripping experience, and the design of the connecting portion 22112 makes it more convenient to articulate the wrench 2211 with the transmission connector 2212 and the support body 21.

[0103] Specifically, the gripping portion 22111 is integrally formed at one end of the connecting portion 22112 away from the supporting body 21, and a set angle is formed between the gripping portion 22111 and the connecting portion 22112. Preferably, the angle is greater than 90° and less than 135°, so that it is convenient for the user to hold and operate the wrench 2211 to lock or release the retracted rod 12, and the user experience is better.

[0104] In some embodiments, the second end of the connecting portion 22112 is provided with a second hinge hole suitable for being hinged to an end of the supporting body 21 away from the guide portion 211; the connecting portion 22112 is also provided with a third hinge hole suitable for being hinged to the first end of the transmission connecting member 2212, and the third hinge hole is located between the second hinge hole and the holding portion 22111.

[0105] In the above embodiment, one end of the connecting portion 22112 is hinged to the supporting body 21 through the second hinge hole, and the other end is provided with a gripping portion 22111 for the user to hold, and the middle portion is hinged to the transmission connecting member 2212 through the third hinge hole, so that when the entire wrench 2211 is driven to move by the gripping portion 22111, the locking member 222 can be driven to move more easily.

[0106] Specifically, the connecting portion 22112 includes two connecting plates arranged opposite to each other, one end of the two connecting plates close to the gripping portion 22111 is fixed to the gripping portion 22111, and the other end is placed in the two hinged plates. The two connecting plates are respectively provided with a second hinge hole and a third hinge hole, and the second hinge hole and the first hinge hole, as well as the transmission connecting member 2212 and the third hinge hole are respectively connected by pins, and the first end of the transmission connecting member 2212 is placed in the two connecting plates, which can make the structure more compact.

[0107] In some embodiments, a damping mechanism may be provided between the wrench 2211 and the hinge portion 213 , and the damping mechanism is used to prevent the wrench 2211 from moving randomly.

[0108] Optionally, the damping mechanism includes a damping plate or a damping washer arranged in the second hinge hole.

[0109] In some embodiments, the transmission connection member 2212 includes an arc-shaped connecting rod, and two ends of the arc-shaped connecting rod are respectively hinged to the wrench 2211 and the locking member 222.

[0110] In one example, hinge holes are respectively provided at both ends of the arc-shaped connecting rod, the hinge hole at the first end is connected to the third hinge hole mentioned above through a pin, and the hinge hole at the second end is hinged to the locking rod described below.

[0111] In the above embodiment, the transmission connection member 2212 adopts the design of an arc-shaped connecting rod, so that the rotational motion of the wrench 2211 can be converted into the reciprocating motion of the locking member 222 through the transmission of the arc-shaped connecting rod.

[0112] Optionally, the opening of the arc-shaped connecting rod faces the connection side of the support body 21 and the wrench 2211 .

[0113] In some embodiments, the locking member 222 includes a locking rod, a first end of which is hinged to the driving member 221, and a second end of which is constructed as an abutting end 2221 suitable for abutting against the retracted rod 12; an opening 2110 is provided on the guide portion 211 for the abutting end 2221 to contact the retracted rod 12.

[0114] In one example, the first end of the locking rod includes two arms arranged opposite to each other, and a hinge hole is provided on the arm, which is connected to the hinge hole at the second end of the arc-shaped connecting rod through a pin.

[0115] In the above embodiment, the locking member 222 adopts the form of a locking rod, which has a simple structure and is easy to process and form. Through the opening 2110 set on the guide portion 211 corresponding to the abutting end 2221 of the locking rod, the locking rod can pass through the guide portion 211 to abut against the retracted rod 12, thereby pressing down and fixing the retracted rod 12.

[0116] Specifically, the guide portion 211 has a hollow guide channel, the locking rod is a straight rod-shaped structure, the outer diameter of the locking rod is smaller than the inner diameter of the guide channel, and it can move freely in the guide channel. The opening 2110 is arranged at one end of the guide portion 211 away from the first cylinder and is located on the inner circumferential wall of the guide portion 211. The opening 2110 connects the inner cavity of the guide portion 211 and the inner cavity of the sleeve portion 212.

[0117] Furthermore, the guide portion 211 and the sleeve portion 212 are integrally formed, and the guide portion 211 and the sleeve portion 212 share part of the side wall, and the opening 2110 is provided on the shared common side wall. Therefore, the opening 2110 can also be said to be provided on the sleeve portion 212, specifically, on the peripheral wall at one end of the second cylinder away from the first cylinder, and the opening 2110 connects the guide portion 211 and the second cylinder.

[0118] In some embodiments, the side of the outer peripheral wall of the abutting end 2221 close to the inner retracted rod 12 is cut into a plane; or, the side of the outer peripheral wall of the abutting end 2221 close to the inner retracted rod 12 is cut into an arc surface matching the outer peripheral wall of the inner retracted rod 12.

[0119] In the above embodiment, by cutting the side of the outer peripheral wall of the abutting end 2221 close to the inner retracting rod 12 into a flat surface or an arc surface, the contact area between the abutting end 2221 and the inner retracting rod 12 can be increased, the friction force can be increased, and the locking effect can be improved. Of course, a friction plate can also be provided on the abutting end 2221 of the locking rod to increase the friction force between it and the inner retracting rod 12.

[0120] In some embodiments, a protruding structure 2222 is disposed on the plane or curved surface.

[0121] In the above embodiment, a protruding structure 2222 is provided at the end where the locking rod and the retracting rod 12 act, thereby reducing the contact force area between the locking rod and the retracting rod 12, thereby increasing the pressure exerted by the locking rod on the retracting rod 12, making the locking rod more stable when locking and fixing the retracting rod 12, and less likely to slip, thereby further improving the locking effect.

[0122] Optionally, the raised structure 2222 may be in the form of anti-slip grooves, ridges, or wavy convex strips.

[0123] In some embodiments, the guide portion 211 is a guide sleeve, and an opening 2110 is provided on the side of the guide sleeve facing the retracted rod 12 . The locking rod moves along the guide sleeve through the opening 2110 and contacts the retracted rod 12 .

[0124] In the above embodiment, the opening 2110 provided on the guide sleeve facilitates the abutting end 2221 of the locking rod to extend and abut against the retracted rod 12 .

[0125] Combine the following Figures 1 to 10 , the structure and working principle of the telescopic locking mechanism of this embodiment are introduced.

[0126] like Figures 1 to 4 As shown, in this embodiment, the locking structure 20 is sleeved on the telescopic rod 10 in the form of a sleeve, and the locking structure 20 includes a supporting body 21 and a locking assembly 22, wherein the supporting body 21 includes a sleeve portion 212, a guide portion 211 and a hinge portion 213, and the locking assembly 22 includes a driving member 221 and a locking member 222, the driving member 221 includes a wrench 2211, and a transmission connecting member 2212 hinged between the locking member 222 and the wrench 2211, the transmission connecting member 2212 is connected to the wrench 2211 and the locking member 222 respectively by pins, and the wrench 2211 and the supporting body 21 are also connected by pins.

[0127] Locking and unlocking principle: When using, Figures 1 to 7 As shown, the wrench 2211 is rotated in the direction close to the telescopic rod 10, and the wrench 2211 drives the locking member 222 to move obliquely downward along the guide portion 211 under the transmission of the transmission connecting member 2212. The locking member 222 passes through the opening 2110 and is pressed down onto the retracted rod 12. The pressure applied by the locking member 222 to the retracted rod 12 achieves a locking effect; conversely, Figures 8 to 10 As shown, the wrench 2211 is rotated in a direction away from the telescopic rod 10, and the locking member 222 moves obliquely upward along the guide portion 211 away from the retracting rod 12, so as to cancel the pressure applied by the locking member 222 on the retracting rod 12, thereby achieving unlocking. The telescopic locking mechanism provided in this embodiment locks and unlocks by converting the rotation of the wrench 2211 into the movement of the locking member 222, and has a simple structure and is easy to operate.

[0128] The telescopic locking mechanism provided in this embodiment is widely used in products that require adjustment of the length of the rod body, such as mop rods, tent building rods, and legs of tables or chairs that require adjustment of height.

[0129] Preferably, the telescopic locking mechanism provided in this embodiment is applied to the mop rod of the mop to adjust the length of the mop rod, which is convenient for users to use.

[0130] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A telescopic locking mechanism, characterized in that: include: A telescopic rod (10), the telescopic rod (10) comprising an outer rod (11) and an inner retractable rod (12) slidably sleeved inside the outer rod (11) along the length direction of the outer rod (11); A locking structure (20), the locking structure (20) comprising a supporting body (21) and a locking assembly (22); wherein the supporting body (21) is fixedly arranged on the outer rod (11), the supporting body (21) comprises a guiding portion (211) which gradually shrinks toward the retracted rod (12), the locking assembly (22) moves along the guiding portion (211) in a direction close to the retracted rod (12) to press against the retracted rod (12) so that the telescopic rod (10) is in a locked state, or the locking assembly (22) moves along the guiding portion (211) in a direction away from the retracted rod (12) to release the retracted rod (12) so that the telescopic rod (10) is in an unlocked state.

2. The telescopic locking mechanism according to claim 1, characterized in that: The retracted rod (12) at least partially extends out of the outer rod (11), and the guide portion (211) gradually shrinks toward the retracted rod (12) located outside the outer rod (11).

3. The telescopic locking mechanism according to claim 2, characterized in that: The supporting body (21) further comprises a clamping sleeve portion (212), wherein the clamping sleeve portion (212) is sleeved at the junction of the outer rod (11) and the retracted rod (12) and is clamped and fixed to the outer rod (11), and the guide portion (211) is arranged on the clamping sleeve portion (212).

4. The telescopic locking mechanism according to claim 3, characterized in that: The ferrule portion (212) comprises: A first cylindrical section (2121) which is sleeved outside the outer sleeve (11) and is interference fit with the outer sleeve (11); A second barrel section (2122) is sleeved outside the retractable rod (12) and is clearance-matched with the retractable rod (12); The inner diameter of the first barrel section (2121) is greater than the inner diameter of the second barrel section (2122), and a limiting step (2120) is formed at the junction of the first barrel section (2121) and the second barrel section (2122), and the limiting step (2120) is abutted against and limited by the end wall of the outer sleeve (11).

5. The telescopic locking mechanism according to claim 3 or 4, characterized in that: The guide portion (211) is a guide sleeve fixedly arranged on the clamping sleeve portion (212), and the central axis of the guide sleeve forms a set angle with the central axis of the clamping sleeve portion (212).

6. The telescopic locking mechanism according to any one of claims 1 to 4, characterized in that: The guide portion (211) is a guide surface that gradually shrinks toward the retracted rod (12).

7. The telescopic locking mechanism according to any one of claims 1 to 4, characterized in that: The supporting body (21) further comprises a hinged portion (213) disposed away from the guiding portion (211), and the supporting body (21) and the locking assembly (22) are hingedly connected via the hinged portion (213).

8. The telescopic locking mechanism according to claim 7, characterized in that: The hinged portion (213) is fixedly arranged on the outer wall of the clamping sleeve portion (212) of the supporting body (21), and the hinged portion (213) comprises two hinged plates arranged opposite to each other, and the two hinged plates are respectively provided with a first hinged hole suitable for hinged connection with the locking assembly (22).

9. The telescopic locking mechanism according to any one of claims 1 to 4 and 8, characterized in that: The locking assembly (22) comprises a driving member (221) and a locking member (222) movably connected to the driving member (221); the driving member (221) is hinged to an end of the supporting body (21) away from the guide portion (211); the locking member (222) is movably arranged in the guide portion (211), so that when the driving member (221) approaches or moves away from the telescopic rod (10), the locking member (222) is driven by the driving member (221) to move along the guide portion (211) in a direction close to the retracted rod (12) to press against the retracted rod (12) so that the telescopic rod (10) is in a locked state; or the locking member (222) is driven by the driving member (221) to move along the guide portion (211) in a direction away from the retracted rod (12) to release the retracted rod (12) so that the telescopic rod (10) is in an unlocked state.

10. The telescopic locking mechanism according to claim 9, characterized in that: The driving member (221) comprises a wrench (2211) and a transmission connecting member (2212); the wrench (2211) is hinged to one end of the supporting body (21) away from the guide portion (211); and the transmission connecting member (2212) is hinged to the wrench (2211) and the locking member (222), respectively.

11. The telescopic locking mechanism according to claim 10, characterized in that: The wrench (2211) comprises: A grip portion (22111); A connecting portion (22112), wherein the first end of the connecting portion (22112) is fixedly connected to the holding portion (22111), the second end of the connecting portion (22112) is hinged to an end of the supporting body (21) away from the guiding portion (211), and the connecting portion (22112) is hinged to the first end of the transmission connecting member (2212).

12. The telescopic locking mechanism according to claim 11, characterized in that: The second end of the connecting portion (22112) is provided with a second hinge hole suitable for being hinged to an end of the supporting body (21) away from the guiding portion (211); the connecting portion (22112) is also provided with a third hinge hole suitable for being hinged to the first end of the transmission connecting member (2212), and the third hinge hole is located between the second hinge hole and the holding portion (22111).

13. The telescopic locking mechanism according to any one of claims 10 to 12, characterized in that: The transmission connecting member (2212) comprises an arc-shaped connecting rod, and two ends of the arc-shaped connecting rod are respectively hinged to the wrench (2211) and the locking member (222).

14. The telescopic locking mechanism according to any one of claims 10 to 12, characterized in that: The locking member (222) comprises: A locking rod, wherein the first end of the locking rod is hinged to the driving member (221), and the second end of the locking rod is configured as an abutment end (2221) suitable for abutting against the retracted rod (12); The guide portion (211) is provided with an opening (2110) through which the abutting end (2221) and the retracted rod (12) can come into contact.

15. The telescopic locking mechanism according to claim 14, characterized in that: The side of the outer peripheral wall of the abutting end (2221) close to the retracted rod (12) is cut into a flat surface; Alternatively, a side of the outer peripheral wall of the abutting end (2221) close to the retracted rod (12) is cut into a curved surface that matches the outer peripheral wall of the retracted rod (12).

16. The telescopic locking mechanism according to claim 15, characterized in that: A protruding structure (2222) is provided on the plane or the curved surface.

17. The telescopic locking mechanism according to claim 15 or 16, characterized in that: The guide portion (211) is a guide sleeve, and an opening (2110) is provided on the side of the guide sleeve facing the retracted rod (12). The locking rod moves along the guide sleeve through the opening (2110) and contacts the retracted rod (12).

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