CN221037077U - Mechanical telescopic stick - Google Patents

Abstract

The utility model relates to the technical field of defending equipment and police equipment, in particular to a mechanical telescopic rod which at least comprises a first sleeve, a second sleeve, a lock body assembly and an unlocking rod assembly, wherein the first sleeve is movably sleeved outside the second sleeve, and the lock body assembly is arranged at the end part of the second sleeve and can be clamped with the first sleeve so as to lock the first sleeve and the second sleeve in an extending state; the unlocking rod assembly is movably inserted into the lock body assembly, and when the unlocking rod assembly is inserted into the lock body assembly to enable the lock body assembly to deform so as to be separated from the first sleeve, the first sleeve and the second sleeve are in a free telescopic state. The utility model aims to solve the problems that the existing mechanical telescopic stick is complex in structure, difficult to install and easy to damage, and provides a mechanical telescopic stick which is easy to install, difficult to damage and reliable in telescopic performance.

Description

Mechanical telescopic stick

Technical Field

The utility model relates to the technical field of defending equipment and police equipment, in particular to a mechanical telescopic rod.

Background

The mechanical telescopic rod in the prior art comprises a plurality of sleeves and two or more locking structures with locking blocks, wherein the two or more locking structures are arranged on each sleeve, the locking blocks of the locking structures are moved along the sleeves in the radial direction to lock and unlock the two adjacent sleeves, but the mechanical telescopic rod in the prior art is influenced by the locking structure of the two or more locking blocks, and has the defects of multiple parts, complex structure, difficult installation, easy damage and the like.

Disclosure of utility model

The utility model aims to solve the problems that the existing mechanical telescopic stick is complex in structure and difficult to install, and provides a mechanical telescopic stick which is easy to install, difficult to damage and reliable in telescopic performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The mechanical telescopic rod at least comprises a first sleeve, a second sleeve, a lock body assembly and an unlocking rod assembly, wherein the first sleeve is movably sleeved outside the second sleeve, and the lock body assembly is arranged at the end part of the second sleeve and can be clamped with the first sleeve so as to lock the first sleeve and the second sleeve in an extending state; the unlocking rod assembly is movably inserted into the lock body assembly, and when the unlocking rod assembly is inserted into the lock body assembly to enable the lock body assembly to deform so as to be separated from the first sleeve, the first sleeve and the second sleeve are in a free telescopic state.

In the scheme, the first sleeve is sleeved with the second sleeve to form a telescopic structure, the second sleeve is locked by the lock body assembly, so that the positions of the second sleeve and the first sleeve are fixed, and the extension of the telescopic stick is realized; utilize the unblock pole subassembly to peg graft with the lock body subassembly, make the lock body subassembly produce deformation, can make lock body subassembly and first sleeve pipe separation, and then release the lock body subassembly and to the locking effect of second sleeve pipe, make the second sleeve pipe shrink for first sleeve pipe, finally realize the shrink of expansion rod. The lock body assembly capable of being deformed is adopted, the lock body assembly is utilized to realize the locking or unlocking function in different states, the unlocking rod moves back and forth relative to the lock body assembly to unlock the lock body assembly, the structure is simple, the number of parts is small, the telescopic stick is easy to install, the cost is low, and the telescopic stick is not easy to damage.

Further, one end of the lock body component is inserted into the second sleeve, the other end of the lock body component protrudes out of the second sleeve, one end of the lock body component inserted into the second sleeve is defined as a first end, and one end of the lock body component protruding out of the second sleeve is defined as a second end; an avoidance space is formed between the side wall of the lock body assembly and the unlocking rod assembly, and when the unlocking rod assembly is inserted into different parts of the lock body assembly, the second end can be expanded or contracted to be clamped with or separated from the first sleeve. The first end of the lock body assembly is used for installing the second sleeve, and the second end of the lock body assembly is used for being clamped or separated from the first sleeve; specifically, utilize dodging the space on the lock body subassembly, make the lock body subassembly make first end prop up when unblock pole subassembly and first end grafting to drive the second end and produce deformation, second port portion shrink makes the second end break away from with first sheathed tube joint, thereby realizes the separation of lock body subassembly and first sheathed tube, makes the second sleeve pipe can make round trip movement in order to realize the shrink of flexible rod for first sleeve pipe.

Further, a through hole for plugging is formed in the middle of the lock body assembly in a penetrating manner, the aperture of the through hole at the first end is smaller than that of the through hole at the second end, the unlocking rod assembly is plugged with the through hole, the avoidance space is located at the second end, and a yielding gap is formed in the side wall of the lock body assembly at the second end; when the unlocking rod assembly is separated from the first end, the lock body assembly is clamped with the first sleeve; when the unlocking rod component is inserted into the first end, the lock body component is separated from the first sleeve. The aperture of the through hole at the first end is smaller than that of the through hole at the second end, and when the unlocking rod assembly and the through hole are inserted at the second end, the unlocking rod assembly cannot influence the lock body assembly due to the fact that a gap exists between the through hole and the unlocking rod assembly; when the unlocking rod assembly is gradually inserted into the through hole, the through hole is positioned at the first end, and the through hole is positioned at the first end, so that the unlocking rod assembly and the through hole are inserted into each other at the first end, the inner wall of the first end is extruded, the second end swings along with the first end, the second end contracts, the second end is separated from the inner wall of the first sleeve, and the unlocking function is realized. The setting of the notch of stepping down makes the second end can produce deformation under the atress of first end, dodges the space and makes the second end have deformation space, simultaneously, the setting of the notch of stepping down makes the shrinkage of the lock body subassembly of being convenient for, makes the shrink that the second end realized. To separate the lock body assembly from the first sleeve.

Further, the inner wall of the first sleeve is provided with a clamping groove, the second end of the first sleeve is provided with a boss, and the boss can be clamped with the clamping groove. The boss is limited with the draw-in groove in the joint, realizes the locking of lock body subassembly to the second sleeve pipe position in first sleeve pipe.

Further, the second sleeve inner wall is provided with a mounting groove, the outer wall of the lock body assembly between the first end and the second end is provided with a first limiting step, the first end is arranged in the mounting groove, and the first limiting step is abutted to the end part of the mounting groove, which is close to the first sleeve. The mounting groove is used for mounting the lock body assembly, so that the first end can be accommodated in the mounting groove, the first limiting step and the mounting groove are utilized to limit the first end, the first end is prevented from being separated from the mounting groove, the lock body assembly can be kept in a connection relation with the second sleeve no matter in a locking state or an unlocking state, and the locking or unlocking of the lock body assembly is realized only by changing the connection relation between the lock body assembly and the first sleeve.

Further, the lock body assembly is formed by connecting a plurality of lock blocks end to end in sequence and surrounding the lock blocks. The locking piece has elastic action, and the first end of the lock body component is deformed and contracted by the second end after being extruded by utilizing the deformation generated after the locking piece is stressed, so that the lock body component is separated from the first sleeve to be unlocked.

Further, the yielding gap is arranged between two adjacent locking blocks, and extends from the second end to the first end. The setting of the relief notch enables the lock body assembly to have a deformation space, so that the second end can be flexibly switched between an expanded state in an original state and a contracted state after deformation caused by stress.

Further, the outer sides of the locking blocks are provided with concave parts, and the concave parts of the plurality of locking blocks are all arranged along the same length position of the lock body assembly; the lock body assembly is also sleeved with a steel ring, and the steel ring is sleeved at the concave part. The lock body assembly utilizes the lever principle, when the unlocking rod assembly acts on the first end of the lock body assembly, the concave part cannot be outwards expanded and can only inwards contract by arranging the steel ring, and the concave part is used as a fulcrum of the lever, so that the first end is unfolded, and the second end is contracted at the same time, thereby realizing the separation of the lock body assembly and the first sleeve; preferably, the concave part is of an arc-shaped structure; specifically, the position of the recess portion may be set correspondingly according to the length of the lock body assembly, and preferably, the recess portion is located at a position of 1/3 to 1/2 of the position of the lock body assembly from the first end. So that the second end has better contraction effect when the unlocking rod component is used for expanding the first end.

Further, the unlocking rod assembly comprises a tail cover and an elastic rod piece, the tail cover is arranged at the end part of the first sleeve pipe, which is far away from the second sleeve pipe, the elastic rod piece is movably inserted with the tail cover, the end part of the elastic rod piece can be inserted into the lock body assembly, a second limiting step is arranged on the elastic rod piece, and the second limiting step can be in limiting connection with the tail cover. The tail cover is used for installing an elastic rod piece, so that the elastic rod piece is connected with the first sleeve; the elastic rod piece can realize back and forth telescopic motion relative to the second sleeve.

Further, the elastic rod piece comprises an unlocking button, a spring and an unlocking rod which are sequentially arranged, the spring is arranged outside the tail cover and sleeved on the unlocking rod, the unlocking rod is inserted into the tail cover, the unlocking rod can be inserted into the lock body assembly, the second limiting step is located on the unlocking rod, and the tail cover separates the second limiting step from the spring at two sides. The unlocking button can be conveniently pressed, the spring provides restoring force, the unlocking rod can move back and forth relative to the second sleeve under the action of the spring, and specifically, the unlocking rod moves forwards to achieve splicing with the first end by pressing the unlocking button to enable the spring to be stressed, so that the lock body assembly is unlocked; and under the action of restoring force of the spring, the unlocking rod can restore to the original position after the lock body component is unlocked, and at the moment, the second sleeve can stretch and retract relative to the first sleeve due to the unlocking.

Further, the device also comprises a third sleeve, wherein the third sleeve is movably sleeved in the second sleeve; the two lock body assemblies are arranged on the second sleeve and can be clamped with the first sleeve, the other lock body assembly is arranged on the third sleeve and can be clamped with the second sleeve, and when the second sleeve and the third sleeve are both unfolded, the end part of the unlocking rod assembly is close to the first end of the lock body assembly positioned on the second sleeve; when the second sleeve and the third sleeve are contracted, the unlocking rod assembly is sequentially spliced with the two lock body assemblies. The third sleeve is sleeved in the second sleeve, the telescopic rod protrudes out of the second sleeve in the unfolded state, the second sleeve protrudes out of the first sleeve, the telescopic rod is greatly extended, at the moment, the two lock body assemblies are in locking states, the third sleeve cannot move relative to the second sleeve, and the second sleeve cannot move relative to the first sleeve; when the lock body assembly is in the unlocking state, the third sleeve can retract into the second sleeve, and the second sleeve can retract into the first sleeve, so that the whole telescopic rod is in the contracted state. The locking and unlocking principle of the lock body assembly in the third sleeve is similar to that of the lock body assembly in the second sleeve, and the lock body assembly in the third sleeve is in a locking state when being clamped with the inner wall of the second sleeve; when the unlocking rod assembly is inserted into the whole lock body assembly, the locking effect of the lock body assembly can be released, so that the second sleeve is separated from the lock body assembly, and the third sleeve can stretch and retract relative to the second sleeve.

The lock body component is firm in structure and not easy to damage, the product quality of the mechanical telescopic rod is improved, and the problem of product failure caused by the damage of the lock body component in the process of striking or poking in the use process can be effectively reduced; the utility model has simple structure, reduces the number of product parts and improves the assembly production efficiency of the mechanical telescopic rod while improving the product performance of the mechanical telescopic rod.

Drawings

Fig. 1 is a block diagram of a mechanical telescopic rod according to embodiment 1 of the present utility model in a locked state of a lock assembly.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a partial enlarged view at B in fig. 1.

Fig. 4 is a structural diagram showing the plugging of the unlocking lever assembly and the lock body assembly according to embodiment 1 of the present utility model.

Fig. 5 is a block diagram of the lock body assembly of embodiment 1 of the present utility model in a first orientation.

Fig. 6 is a structural view of the lock body assembly of embodiment 1 of the present utility model in a second direction.

Fig. 7 is a block diagram of a mechanical telescopic rod according to embodiment 1 of the present utility model in an unlocked state of the lock assembly.

Fig. 8 is a structural view showing an embodiment 2 of a mechanical telescopic rod according to the present utility model in an unlocked state of a lock assembly.

Fig. 9 is a block diagram of a lock body assembly according to embodiment 2 of the present utility model in a first orientation.

Fig. 10 is a structural view of the lock body assembly of embodiment 2 of the present utility model in a second direction.

Fig. 11 is a C-C cross-sectional view of fig. 10.

Fig. 12 is a block diagram of a mechanical telescopic rod according to embodiment 3 of the present utility model in a locked state of the lock assembly.

Fig. 13 is a structural view showing an embodiment 3 of a mechanical telescopic rod according to the present utility model in an unlocked state of a lock assembly.

Wherein, the graphic marks are described as follows:

1. a first sleeve; 11. a clamping groove; 2. a second sleeve; 21. a mounting groove; 3. a lock body assembly; 31. a first end; 32. a second end; 321. a boss; 33. an avoidance space; 34. a through hole; 35. a relief notch; 36. a first limit step; 37. a locking piece; 371. a recessed portion; 38. a steel ring; 4. an unlocking lever assembly; 41. a tail cover; 42. an elastic rod member; 421. a second limit step; 422. an unlock button; 423. a spring; 424. unlocking the rod; 5. and a third sleeve.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

Referring to fig. 1 to 7, an embodiment 1 of a mechanical telescopic rod according to the present utility model includes a first sleeve 1, a second sleeve 2, a lock body assembly 3, and an unlocking lever assembly 4, wherein the first sleeve 1 is movably sleeved outside the second sleeve 2, the first sleeve 1 can move back and forth relative to the second sleeve 2, and the lock body assembly 3 is mounted at an end of the second sleeve 2 and can be clamped with the first sleeve 1, so that the first sleeve 1 and the second sleeve 2 are locked in an extended state; when the lock body assembly 3 is not clamped with the first sleeve 1, the second sleeve 2 can stretch and retract relative to the first sleeve 1, when the lock body assembly 3 is clamped with the first sleeve 1, the second sleeve 2 extends out of the first sleeve 1 to the longest extent, and the second sleeve 2 is locked, so that the second sleeve 2 cannot stretch and retract relative to the first sleeve 1; the unlocking rod assembly 4 is movably inserted into the lock body assembly 3, and when the unlocking rod assembly 4 is inserted into the lock body assembly 3 to deform the lock body assembly 3 so as to be separated from the first sleeve 1, the first sleeve 1 and the second sleeve 2 are in a free telescopic state; the lock body component 3 is clamped with the first sleeve 1 or the lock body component 3 is clamped with the first sleeve 1 by the unlocking rod component 4.

Specifically, one end 31 of the lock body assembly 3 is inserted into the second sleeve 2, the other end protrudes out of the second sleeve 2, the first end 31 is defined as one end of the lock body assembly 3 inserted into the second sleeve 2, and the second end 32 is defined as one end of the lock body assembly 3 protruding out of the second sleeve 2; an avoidance space 33 is formed between the side wall of the lock body assembly 3 and the unlocking lever assembly 4, and when the unlocking lever assembly 4 is inserted into different parts of the lock body assembly 3, the second end 32 can be expanded or contracted to be clamped with or separated from the first sleeve 1. When the unlocking rod assembly 4 is spliced with the second end 32 of the lock body assembly 3, the lock body assembly 3 is still in an original expanded state and is not affected, and at the moment, the lock body assembly 3 is clamped and locked with the first sleeve 1; when the unlocking rod assembly 4 passes through the second end 32 of the lock body assembly 3, enters the first end 31 of the lock body assembly 3 and is spliced with the first end 31, the second end 32 can be contracted to separate the lock body assembly 3 from the first sleeve 1, and the locking of the lock body assembly 3 to the first sleeve 1 is released.

The middle part of the lock body assembly 3 is provided with a through hole 34 for insertion, the aperture of the through hole 34 at the first end 31 is smaller than that of the through hole 34 at the second end 32, the unlocking rod assembly 4 is inserted into the through hole 34, the avoiding space 33 is positioned at the second end 32, and the side wall of the lock body assembly 3 at the second end 32 is provided with a yielding gap 35; when the unlocking lever assembly 4 is not spliced with the first end 31, the lock body assembly 3 is clamped with the first sleeve 1; when the unlocking lever assembly 4 is inserted into the second end 32 and the first end 31 in sequence, the lock body assembly 3 is separated from the first sleeve 1. Because the aperture of the through hole 34 at the first end 31 is smaller than that of the through hole 34 at the second end 32, when the unlocking lever assembly 4 is inserted into the first end 31, the first end 31 of the lock body assembly 3 can be opened, and at the moment, the second end 32 swings around the center of the through hole 34 of the first end 31, so that the second end 32 is in a contracted state, and the second end 32 is further separated from the first sleeve 1, so that the unlocking purpose is achieved.

Further, the inner wall of the first sleeve 1 is provided with a clamping groove 11, the second end 32 is provided with a boss 321, and the boss 321 can be clamped with the clamping groove 11. When the lock body assembly 3 locks the first sleeve 1 in a clamping way, the boss 321 is clamped with the clamping groove 11, so that the lock body assembly 3 locks the first sleeve 1 in a clamping way, and meanwhile, the lock body assembly 3 is fixedly arranged on the second sleeve 2, so that the lock body assembly 3 can lock the first sleeve 1 and the second sleeve 2 simultaneously, and the second sleeve 2 and the first sleeve 1 are prevented from generating relative displacement. Specifically, the inner wall of the second sleeve 2 is provided with a mounting groove 21, the outer wall of the lock body assembly 3 between the first end 31 and the second end 32 is provided with a first limiting step 36, the first end 31 is arranged in the mounting groove 21, and the first limiting step 36 is abutted with the end part of the mounting groove 21, which is close to the first sleeve 1. The first limiting step 36 is in abutting limiting connection with the mounting groove 21, so that the lock body assembly 3 is prevented from being separated from the second sleeve 2, and the lock body assembly 3 is connected with the second sleeve 2.

As a modification of this embodiment, the lock body assembly 3 is formed by sequentially connecting a plurality of lock blocks 37 end to end and surrounding, and the relief notch 35 is disposed between two adjacent lock blocks 37. Furthermore, the relief notch 35 extends from the second end 32 to the first end 31, the relief notch 35 having a depth of at least 1/2 of the length of the lock body assembly 3. When the first end 31 is opened by the arrangement of the yielding notch 35, the second end 32 swings around the center of the through hole 34 of the first end 31, so that the second end 32 is in a contracted state, and the second end 32 is disengaged from the first sleeve 1, thereby achieving the unlocking purpose. The deeper the relief notch 35, the greater the amplitude of the second end 32 swinging relative to the first end 31, which is more convenient for unlocking the lock body assembly 3 from the first sleeve 1 when the unlocking lever assembly 4 is plugged into the first end 31.

The unlocking rod assembly 4 comprises a tail cover 41 and an elastic rod piece 42, the tail cover 41 is arranged at the end part of the first sleeve 1, which is far away from the second sleeve 2, the elastic rod piece 42 is movably inserted into the tail cover 41, the end part of the elastic rod piece 42 is close to the first end 31, a second limiting step 421 is arranged on the elastic rod piece 42, and the second limiting step 421 can be in butt limiting with the tail cover 41. The tail cover 41 is used for installing the elastic rod piece 42, and the elastic rod piece 42 can be movably inserted into the first sleeve 1. The elastic rod member 42 utilizes the elasticity of the elastic rod member to realize automatic resetting after plugging movement in the first sleeve 1.

Specifically, the elastic rod 42 includes an unlocking button 422, a spring 423, and an unlocking rod 424 that are sequentially disposed, the spring 423 is disposed on the tail cover 41 and sleeved outside the unlocking rod 424, the unlocking rod 424 is inserted into the tail cover 41, the end of the unlocking rod 424 is close to the first end 31, the second limiting step 421 is located on the unlocking rod 424, and the tail cover 41 separates the second limiting step 421 from the spring 423 on two sides. The tail cap 41 is used for installing the spring 423 and the unlocking rod 424, and the unlocking button 422 can be used for conveniently pressing the unlocking rod 424; when the unlocking rod 424 is pressed, the unlocking rod 424 moves forward to be spliced with the first end 31 of the lock body assembly 3, so that the lock body assembly 3 and the first sleeve 1 are unlocked, after unlocking, the unlocking button 422 is released, and under the action of the spring 423, the unlocking rod 424 automatically resets to restore to the original state.

The escape space 33 provides a sufficient space for accommodating the unlocking lever in addition to the escape function.

Example 2

As shown in fig. 8 to 10, in embodiment 2 of a mechanical telescopic rod of the present utility model, the present embodiment is similar to embodiment 1, except that the outer side of the locking piece 37 is provided with an arc-shaped recess 371, and the recesses 371 of the plurality of locking pieces 37 are all arranged along the same length position of the lock body assembly 3; the lock body assembly 3 is also sleeved with a steel ring 38, and the steel ring 38 is sleeved at the concave part 371. The lock body assembly 3 utilizes the lever principle, when the unlocking rod assembly 4 acts on the first end of the lock body assembly 3, the concave part 371 can not be expanded outwards and can only be contracted inwards by arranging the steel ring 38, the concave part 371 is used as a fulcrum of the lever, the first end 31 is expanded, and the second end 32 is contracted at the same time, so that the lock body assembly 3 is separated from the first sleeve 1; specifically, the position of the recess 371 may be set correspondingly according to the length of the lock body assembly 3, and preferably, the recess 371 is located at 1/3 to 1/2 of the position of the lock body assembly 3 from the first end 31. To provide a more optimal retraction of the second end 32 when the release lever assembly 4 is extended to the first end 31.

Example 3

Fig. 12 to 13 show an embodiment 3 of a mechanical telescopic rod according to the present utility model, which is similar to embodiment 1, but further includes a third sleeve 5, wherein the third sleeve 5 is movably sleeved in the second sleeve 2; the number of the lock body assemblies 3 is two, one lock body assembly 3 is arranged on the second sleeve 2 and can be clamped with the first sleeve 1, the other lock body assembly 3 is arranged on the third sleeve 5 and can be clamped with the second sleeve 2, and when the second sleeve 2 and the third sleeve 5 are unfolded, the end part of the unlocking rod assembly 4 is close to the first end 31 of the lock body assembly 3 positioned on the second sleeve 2; when the second sleeve 2 and the third sleeve 5 are contracted, the unlocking rod assembly 4 is sequentially spliced with the two lock body assemblies 3.

When the second sleeve 2 and the third sleeve 5 are both unfolded, the unlocking rod assembly 4 is inserted into the second end 32 of the lock body assembly 3 in the second sleeve 2, but is not in contact with the first end 31 of the lock body assembly 3, when the second sleeve 2 is required to shrink, the unlocking rod assembly 4 is inserted into the first end 31 of the lock body assembly 3 after passing through the second end 32, so that the lock body assembly 3 can be unlocked, the second sleeve 2 can shrink relative to the first sleeve 1, and similarly, the fixing or stretching of the third sleeve 5 relative to the second sleeve 2 can be realized by adjusting the inserting position of the unlocking rod assembly 4 and the lock body assembly 3 in the third sleeve 5.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (9)

1. The mechanical telescopic rod is characterized by at least comprising a first sleeve (1), a second sleeve (2), a lock body assembly (3) and an unlocking rod assembly (4), wherein the first sleeve (1) is movably sleeved outside the second sleeve (2), and the lock body assembly (3) is arranged at the end part of the second sleeve (2) and can be clamped with the first sleeve (1) so as to lock the first sleeve (1) and the second sleeve (2) in an extending state; the unlocking rod assembly (4) is movably inserted into the lock body assembly (3), and when the unlocking rod assembly (4) is inserted into the lock body assembly (3) to enable the lock body assembly (3) to deform so as to be separated from the first sleeve (1), the first sleeve (1) and the second sleeve (2) are in a free telescopic state; the unlocking rod assembly (4) comprises a tail cover (41) and an elastic rod piece (42), the tail cover (41) is arranged at the end part of the first sleeve (1) away from the second sleeve (2), the elastic rod piece (42) is movably inserted into the tail cover (41), the end part of the elastic rod piece (42) can be inserted into the lock body assembly (3), a second limiting step (421) is arranged on the elastic rod piece (42), and the second limiting step (421) can be limited by being in butt joint with the tail cover (41).

2. The mechanical telescopic stick according to claim 1, wherein one end (31) of the lock body assembly (3) is inserted into the second sleeve (2), the other end protrudes out of the second sleeve (2), one end of the lock body assembly (3) inserted into the second sleeve (2) is defined as a first end (31), and one end of the lock body assembly (3) protruding out of the second sleeve (2) is defined as a second end (32); an avoidance space (33) is formed between the side wall of the lock body assembly (3) and the unlocking rod assembly (4), and when the unlocking rod assembly (4) is inserted into different parts of the lock body assembly (3), the second end (32) can be expanded or contracted to be clamped with or separated from the first sleeve (1).

3. The mechanical telescopic rod according to claim 2, wherein a through hole (34) for plugging is formed in the middle of the lock body assembly (3), the aperture of the through hole (34) at the first end (31) is smaller than that of the through hole (34) at the second end (32), the unlocking rod assembly (4) is plugged with the through hole (34), the avoidance space (33) is located at the second end (32), and a yielding gap (35) is formed in the side wall of the lock body assembly (3) at the second end (32); when the unlocking rod assembly (4) is separated from the first end (31), the lock body assembly (3) is clamped with the first sleeve (1); when the unlocking rod assembly (4) is plugged with the first end (31), the lock body assembly (3) is separated from the first sleeve (1).

4. A mechanical telescopic stick according to claim 3, wherein the inner wall of the first sleeve (1) is provided with a clamping groove (11), the second end (32) is provided with a boss (321), and the boss (321) can be clamped with the clamping groove (11).

5. The mechanical telescopic rod according to claim 4, wherein the inner wall of the second sleeve (2) is provided with a mounting groove (21), the outer wall of the lock body assembly (3) is provided with a first limiting step (36), the first end (31) is arranged in the mounting groove (21), and the first limiting step (36) is abutted with the end part, close to the first sleeve (1), of the mounting groove (21).

6. The mechanical telescopic stick according to claim 1, wherein the lock body assembly (3) is formed by a plurality of lock blocks (37) which are connected end to end in sequence and are arranged in a surrounding manner.

7. The mechanical telescopic stick according to claim 6, wherein the outer side of the locking piece (37) is provided with a concave part (371), and the concave parts (371) of the plurality of locking pieces (37) are all arranged along the same length position of the lock body assembly (3); the lock body assembly (3) is also sleeved with a steel ring (38), and the steel ring (38) is sleeved at the concave part (371).

8. The mechanical telescopic rod according to claim 1, wherein the elastic rod (42) comprises an unlocking button (422), a spring (423) and an unlocking rod (424) which are sequentially arranged, the spring (423) is arranged on the tail cover (41) and sleeved outside the unlocking rod (424), the unlocking rod (424) is spliced with the tail cover (41), the end part of the unlocking rod (424) can be inserted into the lock body assembly (3), the second limiting step (421) is located on the unlocking rod (424), and the tail cover (41) separates the second limiting step (421) from the spring (423) on two sides.

9. The mechanical telescopic stick according to claim 1, further comprising a third sleeve (5), the third sleeve (5) being movably sleeved in the second sleeve (2); the two lock body assemblies (3) are arranged, one lock body assembly (3) is arranged on the second sleeve (2) and can be clamped with the first sleeve (1), the other lock body assembly (3) is arranged on the third sleeve (5) and can be clamped with the second sleeve (2), and when the second sleeve (2) and the third sleeve (5) are unfolded, the end part of the unlocking rod assembly (4) is close to the first end (31) of the lock body assembly (3) positioned on the second sleeve (2); when the second sleeve (2) and the third sleeve (5) are contracted, the unlocking rod assembly (4) is sequentially spliced with the two lock body assemblies (3).