Telescopic handle and sapper shovel
By designing a detachable connection structure for the sleeve and back cover of the telescopic handle, the problem of the existing handle requiring an additional locking switch is solved, and flexible adjustment and state maintenance of the handle are achieved, reducing costs and improving market competitiveness.
Patent Information
- Application Number
- CN202422822696.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing length-adjustable handles require an additional locking switch to lock the handle after length adjustment, which increases component costs and affects market competitiveness.
By designing a telescopic handle, utilizing the sleeve structure of the first sleeve and the second sleeve, combined with the detachable connection of the back cover, the handle length can be adjusted and locked without the need for an additional locking switch.
The flexible telescopic adjustment and state maintenance of the handle are realized, which reduces production costs and improves market competitiveness.
Smart Images
Figure CN223383441U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of length-adjustable handles, and more particularly to a telescopic handle and an engineer shovel. Background Art
[0002] Everyday tools such as mops and engineering shovels usually need to adjust the length of the handles to meet different needs in different usage states or in normal use and storage folding states.
[0003] Existing adjustable handles typically consist of sections with an additional locking switch. After adjusting the handle length, the handle needs to be tightened to maintain the adjusted length. This structure requires additional components, increasing component costs and reducing the tool's market competitiveness. Utility Model Content
[0004] The purpose of the present utility model is to overcome the problem that the existing length-adjustable handle requires an additional locking switch to lock the handle after length adjustment, which in turn increases the cost of parts. The utility model provides a telescopic handle and an engineer shovel that can achieve telescopic adjustment and state maintenance of the handle through its own structural design without the need for an additional locking switch.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A telescopic handle comprises a first sleeve, a second sleeve, and a back cover, wherein the front end of the first sleeve is provided with a limiting portion, and the second sleeve is sleeved on the outside of the first sleeve; in a shortened state, the front end of the second sleeve abuts against the limiting portion, the back cover is inserted into the gap between the first sleeve and the second sleeve, the outer side of the back cover is detachably connected to the rear end of the second sleeve, and the inner side of the back cover is detachably connected to the rear end of the first sleeve; in an extended state, the front end of the second sleeve is detachably connected to the rear end of the first sleeve, and the back cover is inserted into the rear end of the second sleeve and is detachably connected thereto.
[0007] The second sleeve of the present invention is a hollow structure, and the first sleeve can be a hollow or solid structure. By telescoping the first sleeve and the second sleeve, and utilizing the different telescoping positions of the two, the handle length can be adjusted. In the shortened state, the entire handle length is the sum of the length of the first sleeve exposed from the second sleeve, the length of the second sleeve, and the length of the rear cover exposed from the second sleeve. The rear cover is removably connected to the first and second sleeves to lock the handle length at this time, so that the handle remains in the shortened state. In the extended state, the entire handle length is also the sum of the length of the first sleeve exposed from the second sleeve, the length of the second sleeve, and the length of the rear cover exposed from the second sleeve. The removable connection between the first and second sleeves and the removable connection between the second sleeve and the rear cover locks the handle length at this time, so that the handle remains in the extended state. The difference between the extended and shortened states is that the length of the first sleeve exposed from the second sleeve is different in the two states, with the exposed portion being longer in the extended state. The handle of the present invention can be flexibly switched between the extended and shortened states, and the telescopic adjustment and state maintenance of the handle can be achieved without the need for an additional locking switch. Therefore, the production cost can be reduced and the market competitiveness in terms of price can be improved.
[0008] Furthermore, the rear end of the first sleeve is provided with an external thread, the front end and the rear end of the second sleeve are both provided with internal threads, the outer side of the end of the rear cover is provided with an external thread, and the inner side is provided with an internal thread; in the shortened state, the rear cover is threadedly connected to the rear end of the first sleeve and the rear end of the second sleeve respectively; in the extended state, the front end of the second sleeve is threadedly connected to the rear end of the first sleeve, and the rear cover is threadedly connected to the rear end of the second sleeve. In the shortened state, the front end position of the second sleeve is limited by the limiting portion, and the rear end position of the second sleeve is limited by the threaded connection between the rear cover, the first sleeve and the second sleeve. Therefore, the length of the handle in the shortened state can be maintained unchanged; when the handle needs to be extended, the threaded connection between the rear cover, the first sleeve and the second sleeve is first released, and the second sleeve is moved relative to the first sleeve until the front end of the second sleeve is threadedly connected to the rear end of the first sleeve. At this time, the first sleeve and the second sleeve can be tightened, and the rear cover is then threadedly connected to the rear end of the second sleeve to maintain the appearance and integrity of the handle; or only the threaded connection between the rear cover and the first sleeve can be released, and then the second sleeve is moved relative to the first sleeve until the front end of the second sleeve is threadedly connected to the rear end of the first sleeve, so that the handle can be extended. During this process, the rear cover always remains threadedly connected to the second sleeve.
[0009] Furthermore, the first sleeve is provided with a first clamping portion at the rear end, the second sleeve is provided with a second clamping portion at the front end, and a third clamping portion at the rear end, and the rear cover is provided with a fourth clamping portion at the end; in the shortened state, the fourth clamping portion is respectively engaged with the first clamping portion and the third clamping portion; in the extended state, the second clamping portion is engaged with the first clamping portion, and the fourth clamping portion is engaged with the third clamping portion. The threaded connection between the first sleeve and the rear cover, between the first sleeve and the second sleeve, and between the second sleeve and the rear cover is replaced with a clamping connection. Specifically, the clamping portion can be a slot or a protrusion, and the protrusion is engaged with the slot; in the shortened state, the front end of the second sleeve is limited by the limiting portion, and the rear end of the second sleeve is limited by the clamping connection between the rear cover and the first sleeve and the second sleeve, thereby maintaining the length of the handle unchanged in the shortened state; when the handle needs to be extended, the rear cover and the first sleeve and the second sleeve are first released. The second sleeve is clamped together, and the second sleeve is moved relative to the first sleeve until the front end of the second sleeve is clamped together with the rear end of the first sleeve. At this time, the first sleeve and the second sleeve can be fastened together, and then the rear cover is clamped together with the rear end of the second sleeve to keep the appearance of the handle beautiful and complete. Alternatively, only the clamping connection between the rear cover and the first sleeve can be released, and then the second sleeve is moved relative to the first sleeve until the front end of the second sleeve is clamped together with the rear end of the first sleeve to complete the extension of the handle. During this process, the rear cover always remains clamped together with the second sleeve.
[0010] Furthermore, the invention further comprises a front ferrule, which is sleeved on the outside of the first sleeve and forms the limiting portion. The front ferrule is provided separately from the first sleeve to facilitate processing. Preferably, the front ferrule can be riveted to the first sleeve.
[0011] Furthermore, the front ferrule further includes a first sealing ring. The front ferrule is provided with a first groove. The first sealing ring is located in the first groove. When in a shortened state, the first sealing ring abuts against the inner wall of the second sleeve. The first sealing ring can be an O-ring. The first sealing ring installed on the front ferrule serves to increase damping and prevent the threads from loosening.
[0012] Furthermore, the device further comprises a rear ferrule that is sleeved onto the rear end of the first sleeve. In the shortened state, the rear cover is inserted into the gap between the rear ferrule and the second sleeve, and the inner side of the rear cover is detachably connected to the rear ferrule. In the extended state, the front end of the second sleeve is detachably connected to the rear ferrule. The rear ferrule is disposed separately from the first sleeve to facilitate processing. Preferably, the rear ferrule can be riveted to the first sleeve.
[0013] Furthermore, the rear ferrule is provided with external threads, the front and rear ends of the second sleeve are both provided with internal threads, and the rear cover end is provided with external threads on the outside and internal threads on the inside. In the shortened state, the rear cover is threadedly connected to the rear ferrule; in the extended state, the front end of the second sleeve is threadedly connected to the rear ferrule, and the rear cover is threadedly connected to the rear end of the second sleeve. In the shortened state, the front end of the second sleeve is limited by the front ferrule, and the rear cover is threadedly connected to the rear ferrule to adjust and fix the position of the first sleeve. In the extended state, the second sleeve is limited by the rear ferrule, and the threaded connection with the rear ferrule allows the second sleeve to be adjusted and fixed relative to the first sleeve.
[0014] Furthermore, the rear ferrule is provided with a fifth clamping portion, the front end of the second sleeve is provided with a sixth clamping portion, the rear end is provided with a seventh clamping portion, and the end of the rear cover is provided with an eighth clamping portion. In the shortened state, the eighth clamping portion is respectively engaged with the fifth clamping portion and the seventh clamping portion; in the extended state, the sixth clamping portion is engaged with the fifth clamping portion, and the eighth clamping portion is engaged with the seventh clamping portion. In the shortened state, the rear cover is engaged with the rear ferrule to limit the position of the first sleeve; in the extended state, the second sleeve is engaged with the rear ferrule to maintain the extended position of the first and second sleeves unchanged. Here, the fifth clamping part, the sixth clamping part, the seventh clamping part and the eighth clamping part are used to distinguish from the first clamping part, the second clamping part, the third clamping part and the fourth clamping part in the previous text. The clamping parts mentioned in the previous text are directly provided on the first sleeve, the second sleeve and the back cover without providing a rear ring, while here they are named for the clamping structure after the rear ring is added. Of course, different clamping parts can also adopt similar structures in terms of structure.
[0015] Furthermore, the rear ferrule further includes a second sealing ring. The rear ferrule is provided with a second groove, and the second sealing ring is positioned within the second groove. The second sealing ring also abuts against the inner wall of the second sleeve. The second sealing ring can be an O-ring. The installation of the second sealing ring on the rear ferrule serves to increase damping and prevent the threads from loosening. Furthermore, when the second sleeve moves left and right without a threaded connection, the second sleeve will not be in an undamped state, thereby preventing the impact caused by the second sleeve sliding rapidly relative to the first sleeve and preventing abnormal noise when the second sleeve slides relative to the first sleeve.
[0016] The present invention also provides an engineer shovel, comprising a shovel head and the aforementioned telescopic handle, the shovel head being connected to the front end of the first sleeve. The telescopic structure of the handle allows the engineer shovel to be easily adjusted in length, making it easier to carry when shortened and easier to apply force when extended, thereby reducing the storage space required for the engineer shovel and improving portability. The provision of a first sealing ring also prevents sand and soil from entering the first sleeve when the handle is shortened.
[0017] The principle of using the engineer shovel:
[0018] In the shortened state of use, the front end of the first sleeve is brought into contact with the limiting portion of the second sleeve, and the rear cover is inserted into the gap between the rear ends of the first sleeve and the second sleeve and connected to both, so as to fix the rear end of the first sleeve and maintain the shortened state of the handle. The total length of the handle is the sum of the length of the first sleeve exposed from the second sleeve, the length of the second sleeve, and the length of the rear cover exposed from the second sleeve. At this time, only a very small front end portion of the first sleeve, that is, the portion connected to the shovel head, is exposed from the second sleeve, and the rest is shielded by the second sleeve.
[0019] In the extended use state, the connection between the back cover and the first sleeve is released, and then the second sleeve is pulled from left to right so that the front end of the second sleeve is connected and tightened to the rear end of the first sleeve to maintain the length of the first sleeve and the second sleeve unchanged, so as to maintain the integrity of the handle appearance. At this time, the handle is in the extended state, and the total length of the handle is the sum of the length of the first sleeve exposed from the second sleeve, the length of the second sleeve, and the length of the back cover exposed from the second sleeve. At this time, since the second sleeve slides to the rear end, a larger portion of the first sleeve is exposed from the second sleeve, and only a very small part of the connection between the two at the rear end of the first sleeve is covered by the second sleeve.
[0020] The beneficial effects of the utility model are:
[0021] The telescopic handle of the utility model can achieve telescopic adjustment and state maintenance of the handle through its own structural design, without the need for an additional locking switch. The engineer shovel of the utility model can flexibly switch the handle between the shortened and extended states, which not only meets the use requirements of the engineer shovel, but also facilitates its folding and storage when not in use, improving portability. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a structural diagram of a telescopic handle of the utility model when it is shortened.
[0023] Figure 2 yes Figure 1 sectional view of .
[0024] Figure 3 yes Figure 2 A partial enlarged view of point A.
[0025] Figure 4 yes Figure 2 A partial enlarged view of point B.
[0026] Figure 5 This is a structural diagram of a telescopic handle of the utility model when it is extended.
[0027] Figure 6 yes Figure 5 sectional view of .
[0028] Figure 7 yes Figure 6 A partial enlarged view of point C.
[0029] Figure 8 This is a structural diagram of an engineer shovel of the utility model when it is shortened.
[0030] Figure 9 This is a structural diagram of an engineer shovel of the utility model when it is extended.
[0031] The symbols in the diagram are explained as follows:
[0032] 1. First sleeve; 2. Second sleeve; 3. Back cover; 4. Front ferrule; 5. Back ferrule; 6. First sealing ring; 7. Second sealing ring; 8. Shovel head. DETAILED DESCRIPTION
[0033] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0035] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0036] Example 1
[0037] like Figures 1 to 7 The figure shows an embodiment 1 of a telescopic handle of the present invention, comprising a first sleeve 1, a second sleeve 2, and a back cover 3. The front end of the first sleeve 1 is provided with a limit portion, and the second sleeve 2 is sleeved on the outside of the first sleeve 1; in the shortened state, the front end of the second sleeve 2 abuts against the limit portion, the back cover 3 is inserted into the gap between the first sleeve 1 and the second sleeve 2, the outer side of the back cover 3 is detachably connected to the rear end of the second sleeve 2, and the inner side of the back cover 3 is detachably connected to the rear end of the first sleeve 1; in the extended state, the front end of the second sleeve 2 is detachably connected to the rear end of the first sleeve 1, and the back cover 3 is inserted into the rear end of the second sleeve 2 and detachably connected thereto.
[0038] The second sleeve 2 of the present invention is a hollow structure, and the first sleeve 1 can be a hollow or solid structure. By sleeve-connecting the first sleeve 1 and the second sleeve 2, and utilizing the different sleeve positions of the two, the length of the handle can be adjusted. In the shortened state, the length of the entire handle is the sum of the length of the first sleeve 1 exposed to the second sleeve 2, the length of the second sleeve 2, and the length of the back cover 3 exposed to the second sleeve 2. The detachable connection between the back cover 3, the first sleeve 1, and the second sleeve 2 is used to lock the handle length at this time, so that the handle remains in the shortened state; in the extended state, the length of the entire handle is the sum of the length of the first sleeve 1 exposed to the second sleeve 2, the length of the second sleeve 2, and the length of the back cover 3 exposed to the second sleeve 2. The detachable connection between the first sleeve 1 and the second sleeve 2, and the detachable connection between the second sleeve 2 and the back cover 3 are used to lock the handle length at this time, so that the handle remains in the extended state. The difference in length between the extended and shortened states lies in the difference in the length of the first sleeve 1 exposed from the second sleeve 2, with the exposed portion being longer in the extended state. The handle of the present invention can be flexibly switched between the extended and shortened states without requiring an additional locking switch, enabling the handle to be adjusted and maintained in this state. This reduces production costs and improves market competitiveness in terms of price.
[0039] As an improvement to this embodiment, the rear end of the first sleeve 1 is provided with external threads, the front and rear ends of the second sleeve 2 are both provided with internal threads, and the end of the rear cover 3 is provided with external threads on the outside and internal threads on the inside. In the shortened state, the rear cover 3 is threadedly connected to the rear ends of the first sleeve 1 and the second sleeve 2, respectively. In the extended state, the front end of the second sleeve 2 is threadedly connected to the rear end of the first sleeve 1, and the rear cover 3 is threadedly connected to the rear end of the second sleeve 2. In the shortened state, the position of the front end of the second sleeve 2 is limited by the limiting portion, and the rear end of the second sleeve 2 is limited by the threaded connection between the rear cover 3 and the first sleeve 1 and the second sleeve 2, thereby maintaining the length of the handle in the shortened state. When the handle needs to be extended, the threaded connection between the rear cover 3 and the first sleeve 1 is first released, and the second sleeve 2 is moved relative to the first sleeve 1 until the front end of the second sleeve 2 is threadedly connected to the rear end of the first sleeve 1. At this point, the first sleeve 1 and the second sleeve 2 are tightened, so that the handle maintains its aesthetic appearance and integrity.
[0040] Example 2
[0041] This embodiment is embodiment 2 of a telescopic handle. This embodiment is similar to embodiment 1, except that a first clamping portion is provided at the rear end of the first sleeve 1, a second clamping portion is provided at the front end of the second sleeve 2, a third clamping portion is provided at the rear end, and a fourth clamping portion is provided at the end of the rear cover 3; in the shortened state, the fourth clamping portion is respectively clamped with the first clamping portion and the third clamping portion; in the extended state, the second clamping portion is clamped with the first clamping portion, and the fourth clamping portion is clamped with the third clamping portion.
[0042] The threaded connections between the first sleeve 1 and the back cover 3, between the first sleeve 1 and the second sleeve 2, and between the second sleeve 2 and the back cover 3 are replaced with clamping connections. Specifically, the first clamping portion can be a protrusion, the second clamping portion is a slot, the third clamping portion is a slot, the outer side of the fourth clamping portion is a protrusion, and the inner side is a slot, and the protrusions and the slots are used for clamping; in the shortened state, the front end position of the second sleeve 2 is limited by the limiting portion, and then the slot on the inner side of the back cover 3 is clamped with the protrusion at the rear end of the first sleeve 1, and the back cover The outer projection of the second sleeve 3 is engaged with the slot at the rear end of the second sleeve 2 to limit the position of the rear end of the second sleeve 2, thereby maintaining the length of the handle in the shortened state. When the handle needs to be extended, the engagement between the rear cover 3 and the first sleeve 1 is first released, and the second sleeve 2 is moved relative to the first sleeve 1 until the slot at the front end of the second sleeve 2 is engaged with the projection at the rear end of the first sleeve 1. At this time, the first sleeve 1 and the second sleeve 2 are fastened in position, so that the handle maintains its aesthetic appearance and integrity. Within the scope of knowledge of those skilled in the art, the arrangement of the slot and the projection can also be interchangeable. In addition to the threaded connection and the snap connection structure, other detachable connection structures can also be used between the rear end of the first sleeve 1 and the front end of the second sleeve 2, between the rear end of the first sleeve 1 and the rear cover 3, and between the rear end of the second sleeve 2 and the rear cover 3.
[0043] Example 3
[0044] This embodiment is a telescopic handle embodiment 3, which is similar to embodiment 1, except that Figure 2 and Figure 3 As shown, the front ferrule 4 is also included. The front ferrule 4 is sleeved on the outside of the first sleeve 1 and forms a limit portion. The front ferrule 4 is set separately from the first sleeve 1 to facilitate processing. Preferably, the front ferrule 4 can be riveted to the first sleeve 1.
[0045] Furthermore, a first sealing ring 6 is included. A first groove is provided on the front ferrule 4. The first sealing ring 6 is located in the first groove. When in the shortened state, the first sealing ring 6 abuts against the inner wall of the second sleeve 2. The first sealing ring 6 can be an O-ring. The installation of the first sealing ring 6 on the front ferrule 4 serves to increase damping and prevent the threads from loosening.
[0046] As an improvement to this embodiment, Figure 4 and Figure 7 As shown, the device further includes a rear ferrule 5, which is sleeved onto the rear end of the first sleeve 1. In the shortened state, the rear cover 3 is inserted into the gap between the rear ferrule 5 and the second sleeve 2, and the inner side of the rear cover 3 is detachably connected to the rear ferrule 5. In the extended state, the front end of the second sleeve 2 is detachably connected to the rear ferrule 5. The rear ferrule 5 is provided separately from the first sleeve 1 to facilitate processing. Preferably, the rear ferrule 5 can be riveted to the first sleeve 1.
[0047] Furthermore, the rear ferrule 5 is provided with external threads, the front and rear ends of the second sleeve 2 are both provided with internal threads, and the rear cover 3 has external threads on the outer side and internal threads on the inner side. In the shortened state, the rear cover 3 is threadedly connected to the rear ferrule 5. In the extended state, the front end of the second sleeve 2 is threadedly connected to the rear ferrule 5, and the rear cover 3 is threadedly connected to the rear end of the second sleeve 2. In the shortened state, the front end of the second sleeve 2 is limited by the front ferrule 1, and the rear cover 3 is threadedly connected to the rear ferrule 5 to adjust and fix the position of the first sleeve 1. In the extended state, the second sleeve 2 is limited by the rear ferrule 5, and the threaded connection with the rear ferrule 5 allows the second sleeve 2 to be adjusted and fixed relative to the first sleeve 1.
[0048] Furthermore, a second sealing ring 7 is included. A second groove is defined on the rear ferrule 5. The second sealing ring 7 is positioned within the second groove and abuts against the inner wall of the second sleeve 2. The second sealing ring 7 can be an O-ring. The installation of the second sealing ring 7 on the rear ferrule 5 provides damping to prevent the threads from loosening. Furthermore, when the second sleeve 2 moves left and right without a threaded connection, the second sleeve 2 is not in an undamped state, thereby preventing impact caused by the rapid sliding of the second sleeve 2 relative to the first sleeve 1 and preventing abnormal noise from occurring when the second sleeve 2 slides relative to the first sleeve.
[0049] Example 4
[0050] This embodiment is a fourth embodiment of a telescopic handle. Similar to the first embodiment, the rear ferrule 5 is provided with a fifth clamping portion, the second sleeve 2 is provided with a sixth clamping portion at the front end and a seventh clamping portion at the rear end, and the rear cover 3 is provided with an eighth clamping portion at the end. In the shortened state, the eighth clamping portion engages with the fifth and seventh clamping portions, respectively. In the extended state, the sixth clamping portion engages with the fifth clamping portion, and the eighth clamping portion engages with the seventh clamping portion. The fifth, sixth, seventh, and eighth clamping portions are used to distinguish them from the first, second, third, and fourth clamping portions described above. The clamping portions described above are provided directly on the first sleeve 1, second sleeve 2, and rear cover 3 without the rear ferrule. These designations are specific to the clamping structure after the rear ferrule 5 is added. Of course, the clamping portions with different serial numbers may also employ similar structures.
[0051] In the shortened state, the rear cover 3 is engaged with the rear ferrule 5 to limit the position of the first sleeve 1; in the extended state, the second sleeve 2 is engaged with the rear ferrule 5 to maintain the extended positions of the first sleeve 1 and the second sleeve 2 unchanged.
[0052] Example 5
[0053] This embodiment is an embodiment of an engineer shovel. Figure 8 and Figure 9As shown, the shovel comprises a shovel head 8 and the aforementioned telescopic handle. The shovel head 8 is connected to the front end of the first sleeve 1. The rear end of the shovel head 8 abuts against the stopper, and the shovel head 8 is riveted to the front end of the first sleeve 1. The telescopic structure of the handle allows the engineer shovel to be easily adjusted in length, making it easier to carry when shortened and easier to apply force when extended. This reduces the storage space required for the engineer shovel and improves portability. The provision of a first sealing ring 6 also prevents sand and soil from entering the first sleeve 1 when the handle is shortened.
[0054] The principle of using the engineer shovel:
[0055] In the shortened state of use, the front end of the first sleeve 1 is brought into contact with the limiting portion of the second sleeve 2, and the rear cover 3 is inserted into the gap between the rear ends of the first sleeve 1 and the rear ends of the second sleeve 2 and connected to both, so as to limit the rear end of the first sleeve 1 and maintain the shortened state of the handle. The total length of the handle is the sum of the length of the first sleeve 1 exposed from the second sleeve 2, the length of the second sleeve 2, and the length of the rear cover 3 exposed from the second sleeve 2. At this time, only a very small front end portion of the first sleeve 1, that is, the portion connected to the shovel head 5, is exposed from the second sleeve 2, and the rest is shielded by the second sleeve 2.
[0056] In the extended use state, the back cover 3 is first removed, and then the second sleeve 2 is pulled from left to right to connect and tighten the front end of the second sleeve 2 to the rear end of the first sleeve 1 to maintain the length of the first sleeve 1 and the second sleeve 2 unchanged, so as to maintain the integrity of the handle appearance. At this time, the handle is in the extended state, and the total length of the handle is the sum of the length of the first sleeve 1 exposed from the second sleeve 2, the length of the second sleeve 2, and the length of the back cover exposed from the second sleeve 2. At this time, since the second sleeve 2 slides to the rear end, a larger portion of the first sleeve 1 is exposed from the second sleeve 2, and only a very small portion of the connecting portion of the first sleeve 1 and the second sleeve 2 is shielded by the second sleeve 2 at the rear end of the first sleeve 1.
[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A telescopic handle, characterized in that: The invention comprises a first sleeve (1), a second sleeve (2), and a back cover (3), wherein the front end of the first sleeve (1) is provided with a limiting portion, and the second sleeve (2) is sleeved on the outside of the first sleeve (1); in a shortened state, the front end of the second sleeve (2) abuts against the limiting portion, and the back cover (3) is inserted into the gap between the first sleeve (1) and the second sleeve (2); the outer side of the back cover (3) is detachably connected to the rear end of the second sleeve (2), and the inner side of the back cover (3) is detachably connected to the rear end of the first sleeve (1); in an extended state, the front end of the second sleeve (2) is detachably connected to the rear end of the first sleeve (1), and the back cover (3) is inserted into the rear end of the second sleeve (2) and detachably connected thereto.
2. The telescopic handle according to claim 1, characterized in that: The rear end of the first sleeve (1) is provided with an external thread, the front end and the rear end of the second sleeve (2) are both provided with an internal thread, and the outer side of the end of the rear cover (3) is provided with an external thread, and the inner side is provided with an internal thread; in a shortened state, the rear cover (3) is threadedly connected to the rear end of the first sleeve (1) and the rear end of the second sleeve (2), respectively; in an extended state, the front end of the second sleeve (2) is threadedly connected to the rear end of the first sleeve (1), and the rear cover (3) is threadedly connected to the rear end of the second sleeve (2).
3. The telescopic handle according to claim 1, characterized in that: The first sleeve (1) is provided with a first clamping portion at the rear end, the second sleeve (2) is provided with a second clamping portion at the front end and a third clamping portion at the rear end, and the end of the back cover (3) is provided with a fourth clamping portion; in a shortened state, the fourth clamping portion is clamped with the first clamping portion and the third clamping portion respectively; in an extended state, the second clamping portion is clamped with the first clamping portion, and the fourth clamping portion is clamped with the third clamping portion.
4. The telescopic handle according to any one of claims 1 to 3, characterized in that: It also includes a front ferrule (4), which is sleeved on the outside of the first sleeve (1) and forms the limiting portion.
5. The telescopic handle according to claim 4, characterized in that: It also includes a first sealing ring (6). A first groove is provided on the front ring (4). The first sealing ring (6) is located in the first groove. In the shortened state, the first sealing ring (6) also abuts against the inner wall of the second sleeve (2).
6. The telescopic handle according to claim 1, characterized in that: The invention also includes a rear ferrule (5), which is sleeved on the rear end of the first sleeve (1). When in a shortened state, the rear cover (3) is inserted into the gap between the rear ferrule (5) and the second sleeve (2), and the inner side of the rear cover (3) is detachably connected to the rear ferrule (5); when in an extended state, the front end of the second sleeve (2) is detachably connected to the rear ferrule (5).
7. The telescopic handle according to claim 6, characterized in that: The rear ferrule (5) is provided with an external thread, the front end and the rear end of the second sleeve (2) are both provided with an internal thread, and the outer side of the end of the rear cover (3) is provided with an external thread, and the inner side is provided with an internal thread; in the shortened state, the rear cover (3) is threadedly connected to the rear ferrule (5); in the extended state, the front end of the second sleeve (2) is threadedly connected to the rear ferrule (5), and the rear cover (3) is threadedly connected to the rear end of the second sleeve (2).
8. The telescopic handle according to claim 6, characterized in that: The rear ring (5) is provided with a fifth clamping portion, the front end of the second sleeve (2) is provided with a sixth clamping portion, the rear end is provided with a seventh clamping portion, and the end of the rear cover (3) is provided with an eighth clamping portion; in the shortened state, the eighth clamping portion is clamped with the fifth clamping portion and the seventh clamping portion respectively; in the extended state, the sixth clamping portion is clamped with the fifth clamping portion, and the eighth clamping portion is clamped with the seventh clamping portion.
9. The telescopic handle according to any one of claims 6 to 8, characterized in that: It also includes a second sealing ring (7), a second groove is provided on the rear ring (5), the second sealing ring (7) is located in the second groove, and the second sealing ring (7) is also in contact with the inner wall of the second sleeve (2).
10. An engineer shovel, characterized in that: It comprises a shovel head (8) and a telescopic handle according to any one of claims 1 to 9, wherein the shovel head (8) is connected to the front end of the first sleeve (1).