Internal lock mechanism and telescopic rod

Abstract

The utility model discloses an internal locking mechanism and a telescopic rod, the internal locking mechanism comprises a screw rod assembly, a wedge-shaped forcing block and a locking assembly, the screw rod assembly is configured to be connected with an inner rod, and the screw rod assembly comprises a screw rod part; the wedge-shaped forcing block is connected with the screw rod assembly; the locking assembly comprises a threaded sleeve and a locking sleeve, the locking sleeve is connected with the threaded sleeve, at least part of the locking sleeve is arranged on the periphery of the wedge-shaped forcing block in a sleeving mode, and the threaded sleeve is in threaded fit with the screw rod part and used for converting rotation of the screw rod part into axial movement along the inner locking mechanism and driving the wedge-shaped forcing block to drive the locking sleeve to deform in the radial direction of the inner locking mechanism so as to lock and unlock the outer rod. According to the internal locking mechanism of the telescopic rod, stable locking of the inner rod and the outer rod of the telescopic rod can be achieved, and the structure of the internal locking mechanism is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of daily necessities, in particular to an inner locking mechanism and a telescopic rod. Background Art

[0002] The punch-free telescopic rod is supported between two walls and is used to hang objects. The telescopic rod in the related art includes an inner rod and an outer rod, and a tension rod mechanism is provided to achieve locking of the inner rod and the outer rod. A screw and a threaded sleeve are provided, wherein the screw can be connected to the inner rod, and the tapered screw is used to drive the threaded sleeve outward to achieve locking of the outer rod, thereby achieving locking of the inner rod and the outer rod. The structure is complex and inconvenient to produce. Utility Model Content

[0003] One purpose of the present utility model is to provide an inner locking mechanism and a telescopic rod, which can achieve stable locking of the inner rod and the outer rod of the telescopic rod and simplify the structure of the inner locking mechanism.

[0004] According to the internal locking mechanism for a telescopic rod of an embodiment of the present invention, the telescopic rod includes an outer rod and an inner rod whose end portion is passed through the outer rod, and the internal locking mechanism includes: a screw assembly, the screw assembly is configured to connect the inner rod, the screw assembly includes a screw portion; a wedge-shaped forced block, the wedge-shaped forced block is connected to the screw assembly; a locking assembly, the locking assembly includes a threaded sleeve and a locking sleeve, the locking sleeve is connected to the threaded sleeve and is at least partially sleeved on the outer circumference of the wedge-shaped forced block, the threaded sleeve is threadedly engaged with the screw portion, and is used to convert the rotation of the screw portion into axial movement along the internal locking mechanism, and drive the wedge-shaped forced block to drive the locking sleeve to deform radially along the internal locking mechanism to lock and unlock the outer rod.

[0005] According to the inner locking mechanism of the telescopic rod of the embodiment of the present utility model, the inner rod and the outer rod of the telescopic rod can be stably locked, and the structure of the inner locking mechanism is simplified.

[0006] In addition, the internal locking mechanism of the telescopic rod according to the above embodiment of the present invention may also have the following additional technical features:

[0007] In some embodiments, the locking sleeve and the threaded sleeve are configured as an integral structure.

[0008] In some embodiments, the locking sleeve has a plurality of open grooves distributed along the circumferential direction, and the open grooves penetrate the inner circumferential surface, the outer circumferential surface and the end surface facing away from the threaded sleeve of the locking sleeve; and / or, the locking sleeve extends along the axial direction of the threaded sleeve, and one end circumference is connected to the threaded sleeve.

[0009] In some embodiments, the wedge-shaped pressing block and the screw assembly are configured as a split structure.

[0010] In some embodiments, the screw assembly further includes a connecting rod portion and a positioning portion, wherein one end of the connecting rod portion is connected to the screw portion, and the other end is connected to the positioning portion, and at least a portion of the wedge-shaped block is positioned between the screw portion and the positioning portion.

[0011] In some embodiments, the connecting rod portion extends along the axis of the screw portion, one end of the connecting rod portion is bolted to the screw portion and the other end is connected to the positioning portion; and / or, the connecting rod portion and the positioning portion are configured as a bolt, the connecting rod portion is configured as the rod portion of the bolt, and the positioning portion is configured as the head of the bolt.

[0012] In some embodiments, the screw portion is configured as a plastic screw; and / or the connecting rod portion is configured as a metal connecting rod; and / or the positioning portion is configured as a metal block.

[0013] In some embodiments, the outer circumferential surface of the locking sleeve is provided with a plurality of ribs, and the plurality of ribs are arranged to extend along the axial direction of the inner locking mechanism and are distributed at intervals along the circumference of the inner locking mechanism; and / or, the outer circumferential surface of the locking sleeve is provided with a plurality of ribs, and the end of the rib close to the threaded sleeve gradually increases in height in the direction away from the threaded sleeve.

[0014] In some embodiments, the screw portion is configured as a straight screw.

[0015] In some embodiments, the wedge-shaped block has a first end close to the inner rod and a second end away from the inner rod, and an outer circumferential surface of the wedge-shaped block includes a first wedge-shaped inclined surface with a radial dimension gradually increasing from the first end to the second end.

[0016] In some embodiments, the locking sleeve has a third end close to the inner rod and a fourth end away from the inner rod, and the outer circumferential surface of the locking sleeve includes a second wedge-shaped inclined surface with a radial dimension gradually increasing from the third end to the fourth end.

[0017] In some embodiments, the screw assembly further includes a connecting portion, which is connected to the screw portion and distributed along the axial direction of the inner locking mechanism, and is used to connect to the inner rod.

[0018] In some embodiments, the radial dimension of the connecting portion is larger than the radial dimension of the screw portion, and is used to construct a first step for limiting the threaded sleeve; and / or, the connecting portion includes a first part and a second part, the first part is farther away from the screw portion than the second part, the first part is used to be sleeved on the end of the inner rod, the second part is connected to the screw portion, and the radial dimension of the first part is smaller than the radial dimension of the second part, and is used to construct a second step for limiting the end of the inner rod.

[0019] According to an embodiment of the present invention, the telescopic rod includes: a rod body, the rod body including an inner rod and an outer rod, one end of the inner rod is inserted into the outer rod; the aforementioned internal locking mechanism, the screw assembly is connected to the inner rod, and the locking sleeve can be deformed outward to lock the outer rod or deformed inward to release the lock on the outer rod.

[0020] In some embodiments, at least one end of the rod body is provided with an adjustable base, and the adjustable base includes a base body, a cover body and an axial locking structure. The cover body is rotatably connected to the base body, and a screw-top structure is provided between the cover body and the base body. The screw-top structure is configured to convert the rotational motion of the cover body into movement of the base body along the axis. The axial locking structure connects the cover body and the base body, and is used to limit the axial displacement of the base body relative to the cover body.

[0021] In some embodiments, the inner locking mechanism is configured to lock the inner rod and the outer rod when the inner rod rotates around a first direction, and the screw-top structure is configured to eject the seat body when the cover body rotates around a second direction, and the first direction and the second direction are opposite circumferential directions.

[0022] According to the internal locking mechanism and telescopic rod of the present invention, the internal locking mechanism can lock the inner and outer rods after the inner rod is extended to a predetermined length, thereby locking the length of the telescopic rod. The structure is stable and easy to operate. The multiple openings on the locking sleeve enable the locking sleeve to achieve stable contact with the inner circumference of the outer rod, improving the stability of the locking structure of the inner and outer rods. The locking sleeve and the threaded sleeve are configured as an integrated structure. Even after the multiple openings on the locking sleeve are provided, the structural strength of the locking assembly can still be guaranteed, thereby extending the service life of the internal locking mechanism. In addition, the wedge-shaped block and the screw assembly are configured as separate structures, which can simplify the structure of the screw assembly, improve the molding efficiency of the screw assembly, and reduce costs. The wedge-shaped block and the screw assembly can be made of different materials to improve material utilization and avoid material waste. The taper direction of the locking sleeve and the wedge-shaped block is gradually reduced toward the inner rod. In this way, when the inner rod is rotated to lock, it is pulled outward, that is, when the inner rod is rotated to lock, the overall length of the inner and outer rods is lengthened rather than shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the inner locking mechanism of an embodiment of the present utility model.

[0024] Figure 2 It is an exploded schematic diagram of the inner locking mechanism of one embodiment of the utility model.

[0025] Figure 3a It is a cross-sectional view of an inner locking mechanism of an embodiment of the present utility model.

[0026] Figure 3bIt is a cross-sectional view of an inner locking mechanism of another embodiment of the present invention.

[0027] Figure 4 It is an exploded schematic diagram of the inner locking mechanism of one embodiment of the utility model.

[0028] Figure 5 It is a schematic diagram of a locking assembly of an inner locking mechanism according to an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of a telescopic rod according to an embodiment of the present invention.

[0030] Figure 7 It is a cross-sectional view of an adjustable base according to an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram of the seat body of the adjustable base according to one embodiment of the present invention.

[0032] Figure 9 It is a schematic diagram of a cover of an adjustable base according to an embodiment of the present invention.

[0033] Figure 10 It is a partial cross-sectional view of an adjustable base according to an embodiment of the present invention, wherein the top screw block is supported at a lower position of the first spiral guide surface.

[0034] Figure 11 It is a partial cross-sectional view of an adjustable base according to an embodiment of the present utility model, wherein the top screw block is supported at a high position of the first spiral guide surface.

[0035] Figure 12 It is a partial cross-sectional view of an adjustable base according to an embodiment of the present invention, wherein the second rib is arranged at a lower position of the second spiral guide surface.

[0036] Figure 13 yes Figure 12 A partial enlarged schematic diagram of the area A in the middle circle.

[0037] Figure 14 It is a partial cross-sectional view of an adjustable base according to an embodiment of the present invention, wherein the second rib is arranged at a high position of the second spiral guide surface.

[0038] Figure 15 yes Figure 14 A partial enlarged schematic diagram of the area in the middle circle B.

[0039] Figure 16 It is a partial schematic diagram of the seat body of the adjustable base in one embodiment of the utility model.

[0040] Figure 17 It is a schematic diagram of the first step of the support rod installation step of an embodiment of the present invention.

[0041] Figure 18 It is a schematic diagram of the second step of the support rod installation process of an embodiment of the present invention.

[0042] Figure 19 It is a schematic diagram of the third step of the support rod installation process of an embodiment of the present invention.

[0043] Figure 20 yes Figure 19 A partial enlarged schematic diagram of the area C in the middle circle.

[0044] Reference numerals: support rod 100, rod body 10, inner rod 11, fixing sleeve 111, outer rod 12, first base 20a, second base 20b, adjustable base 20, base body 21, first bottom wall 211, first surrounding wall 212, second surrounding wall 213, flange portion 214, cover body 22, first insertion hole 221, second bottom wall 222, third surrounding wall 223, fourth surrounding wall 224, first spiral guide surface 231, high position 2311, low position 2312, stop portion 2313, screw-top block 232, first locking portion 241, second locking portion 242, third spiral guide surface 2421, second spiral guide surface 2411, first rib 24 12, second rib 2422, spring catch 2423, convex portion 2413, positioning portion 25, internal locking mechanism 30, screw assembly 31, screw portion 311, connecting rod portion 312, positioning portion 313, connecting portion 314, first portion 3141, second portion 3142, wedge-shaped block 32, first half 321, first groove portion 3211, first long groove 3212, second half 322, second groove portion 3221, second long groove 3222, locking assembly 33, threaded sleeve 331, locking sleeve 332, rib 333, open groove 334, first wedge-shaped inclined surface 341, second wedge-shaped inclined surface 342, first wall 200a, second wall 200b. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] like Figure 1 As shown in Figure 3, the present invention provides an internal locking mechanism 30 that can be used for a telescopic rod 100. The telescopic rod 100 includes an outer rod 12 and an inner rod 11 with its end portion passed through. The internal locking mechanism 30 can be configured to lock the inner rod 11 and the outer rod 12 in the telescopic rod 100.

[0047] Specifically, the inner locking mechanism 30 may include: a screw assembly 31, a wedge-shaped pressing block 32, and a locking assembly 33. The screw assembly 31 may be configured to connect to the inner rod, and the screw assembly 31 includes a screw portion 311. The wedge-shaped pressing block 32 is connected to the screw assembly 31. The locking assembly 33 includes a threaded sleeve 331 and a locking sleeve 332. The locking sleeve 332 is connected to the threaded sleeve 331. At least a portion of the locking sleeve 332 is sleeved around the outer circumference of the wedge-shaped pressing block 32. The threaded sleeve 331 is threadedly engaged with the screw portion 311 to convert rotation of the screw portion 311 relative to the threaded sleeve 331 into axial movement of the screw portion 311 relative to the threaded sleeve 331 along the inner locking mechanism 30, thereby driving the wedge-shaped pressing block 32 to drive the locking sleeve 332 to deform radially along the inner locking mechanism 30. When the locking sleeve 332 deforms radially outward, it can lock the outer rod; when the locking sleeve 332 deforms radially inward, it can release the lock on the outer rod.

[0048] When the inner locking mechanism 30 is applied to the telescopic rod 100 , the rod body 10 of the telescopic rod 100 may include an inner rod 11 and an outer rod 12 , and the screw assembly 31 of the inner locking mechanism 30 may be configured to be connected to the inner rod 11 .

[0049] In the initial state, the inner rod 11 and the outer rod 12 can move relative to each other. After the relative positions of the inner rod 11 and the outer rod 12 are basically determined, the inner rod 11 is rotated, and the rotation of the inner rod 11 will drive the screw portion 311 to rotate; the locking assembly 33 is arranged in the outer rod 12 and has a certain friction with the outer rod 12. The relative rotation of the screw portion 311 and the threaded sleeve 331 will be converted into an axial movement of the screw portion 311 or the threaded sleeve 331 along the inner locking mechanism 30; due to the friction between the locking assembly 33 and the outer rod 12, the threaded sleeve 331 will not be able to move When the locking sleeve 332 is deformed radially outward, the friction between the locking sleeve 332 and the outer rod 12 increases, thereby locking the locking sleeve 332 and the outer cylinder, thereby locking the inner rod 11 and the outer rod 12.

[0050] According to the embodiment of the present invention, the inner locking mechanism 30 can be applied to the telescopic rod 100 so as to complete the locking of the inner rod 11 and the outer rod 12 after the inner rod 11 of the telescopic rod 100 is extended to a predetermined length, so as to lock the length of the telescopic rod 100. The structure is stable and easy to operate.

[0051] In addition, in order to facilitate the use of the wedge-shaped forcing block 32 to drive the locking sleeve 332 to deform, the inner diameter of the locking sleeve 332 can be set to be smaller than the outer diameter of the wedge-shaped forcing block 32; or the inner circumference of the locking sleeve 332 can be set to have a shape with a radial dimension that varies along the axial direction, and the outer diameter of the wedge-shaped forcing block 32 can be set to be smaller than the maximum inner diameter of the locking sleeve 332 and larger than the minimum inner diameter of the locking block; or the radial dimension of the outer circumference of the wedge-shaped forcing block 32 can be set to vary along the axial direction, and the minimum outer diameter of the wedge-shaped block can be set to be smaller than the inner diameter of the locking sleeve 332, while the maximum outer diameter of the wedge-shaped block can be larger than the inner diameter of the locking sleeve 332, etc. Of course, the above descriptions are only some embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] like Figure 2 In some embodiments, the locking sleeve 332 and the threaded sleeve 331 are integrally formed. By forming the locking sleeve 332 and the threaded sleeve 331 as an integral structure, the structure of the inner locking mechanism 30 can be simplified, and the manufacture and assembly of the inner locking mechanism 30 can be facilitated. In addition, the locking sleeve 332 can abut the inner wall surface of the outer rod 12 during use. Since the threaded sleeve 331 and the locking sleeve 332 are integrally formed, the friction between the locking sleeve 332 and the outer rod 12 also acts on the threaded sleeve 331, so that the threaded sleeve 331 can maintain a relative position with the outer rod 12. At this time, by rotating the inner rod 11, the screw portion 311 will move under the action of the threads, thereby driving the wedge-shaped pressing block 32 to open the locking sleeve 332, thereby increasing the locking force between the locking sleeve 332 and the outer rod 12.

[0053] Further, if Figure 2 and Figure 5 The locking sleeve 332 has a plurality of circumferentially distributed open slots 334 extending through the inner and outer circumferential surfaces of the locking sleeve 332, as well as the end surface facing away from the threaded sleeve 331. The provision of the plurality of open slots 334 facilitates the use of the wedge-shaped pressing block 32 to open the locking sleeve 332, ensuring consistent deformation of the locking sleeve 332 at different circumferential locations. This in turn facilitates consistent expansion of the locking sleeve 332 at different axial locations, thereby ensuring uniform friction between the locking sleeve 332 and the outer rod 12 at different circumferential locations. This effectively enhances the connection strength between the inner locking mechanism 30 and the outer rod 12, achieving stable locking of the inner and outer rods 11 and 12.

[0054] The number of the opening slots 334 can be set to no more than ten, for example, the number of the opening slots 334 can be set to two, three, four or six, etc. The number of the opening slots 334 can be determined according to the size of the locking sleeve 332. The multiple opening slots 334 can be set to be evenly spaced along the axial direction of the locking sleeve 332 to further improve the uniformity of the locking sleeve 332 when it is opened.

[0055] In addition, the locking sleeve 332 can be set to extend along the axial direction of the threaded sleeve 331, and one end of the threaded sleeve 331 is connected to the threaded sleeve 331 at its periphery. The locking sleeve 332 and the threaded sleeve 331 both surround the screw assembly 31 and extend along the axial direction of the inner locking mechanism 30. The screw assembly 31 can include a connecting portion 314 for connecting to the inner tube. The locking sleeve 332 can be set on the side of the threaded sleeve 331 and away from the connecting portion 314 relative to the threaded sleeve 331.

[0056] like Figures 2 to 4 In some embodiments, the wedge-shaped block 32 and the screw assembly 31 are configured as separate structures. This simplifies the shape of the screw assembly 31 and facilitates its manufacture and molding. Furthermore, during operation, the wedge-shaped block 32 rubs against the locking sleeve 332 , potentially causing wear on the locking sleeve 332 and the wedge-shaped block 32 . Therefore, by configuring the wedge-shaped block 32 and the screw assembly 31 as separate structures, it is possible to optimize the design of the wedge-shaped block 32 , such as performing surface treatment on the wedge-shaped block 32 to increase its wear resistance. This effectively improves the mating stability between the wedge-shaped block 32 and the locking block.

[0057] In addition, if Figure 2 As shown, the wedge-shaped pressing block 32 may include a first half 321 and a second half 322. The first half 321 and the second half 322 extend along the axial direction of the inner locking mechanism 30 and are connected radially. The first half 321 includes a first groove portion 3211, and the second half 322 includes a second groove portion 3221. The first half 321 and the second half 322 are assembled on both sides of the connecting rod portion and surround and embrace the connecting rod portion. In addition, the bottom surface of the first groove portion 3211 is provided with a first long groove 3212, and the bottom surface of the second groove portion 3221 is provided with a second long groove 3222 to facilitate deformation of the first half 321 and the second half 322.

[0058] like Figure 2 3 , in some embodiments, the screw assembly 31 further includes a connecting rod portion 312 and a positioning portion 313. One end of the connecting rod portion 312 is connected to the screw portion 311 and extends along the axis of the screw portion 311 in a direction away from the screw portion 311. The other end of the connecting rod portion 312 is connected to the positioning portion 313. A positioning groove surrounding the connecting rod portion 312 can be formed between the screw portion 311 and the positioning portion 313. At least a portion of the wedge-shaped block 32 can be positioned between the screw portion 311 and the positioning portion 313. This facilitates assembly of the wedge-shaped block 32 with the screw assembly 31, facilitates movement of the wedge-shaped block 32 by the screw assembly 31, and improves the connection strength and stability between the screw assembly 31 and the wedge-shaped block 32.

[0059] like Figure 3bIn some embodiments, the connecting rod portion extends along the axis of the screw portion 311, with one end of the connecting rod portion being bolted to the screw portion 311 and the other end being connected to the positioning portion 31325. Alternatively, the connecting rod portion and the positioning portion 31325 may be configured as a bolt, with the connecting rod portion being the shank of the bolt and the positioning portion 31325 being the head of the bolt. This facilitates the molding and connection of the connecting rod portion and the screw portion 311, simplifies the structure of the screw assembly 31, and improves assembly efficiency.

[0060] Optionally, the screw portion 311 is a plastic screw; and / or the connecting rod portion is a metal connecting rod; and / or the positioning portion 31325 is a metal block. This can further facilitate the production and molding of the bolt assembly and improve the positioning stability of the wedge-shaped pressing block 32.

[0061] As shown in Figure 3, in some embodiments, the wedge-shaped block 32 has a first end close to the inner rod 11 and a second end away from the inner rod 11. The outer peripheral surface of the wedge-shaped block 32 includes a first wedge-shaped inclined surface 341, and the radial dimension of the first wedge-shaped inclined surface 341 gradually increases in the direction from the first end to the second end.

[0062] In other embodiments, the locking sleeve 332 has a third end proximal to the inner rod 11 and a fourth end distal to the inner rod 11. The inner circumferential surface of the locking sleeve 332 includes a second wedge-shaped inclined surface 342. The second wedge-shaped inclined surface 342 gradually increases in radial dimension from the third end to the fourth end. Optionally, the second wedge-shaped inclined surface 342 extends to the end surface of the locking sleeve 332. This facilitates the expansion of the locking sleeve 332 when the wedge-shaped pressing block 32 moves axially along the screw portion 311, thereby improving the stability of the engagement between the locking sleeve 332 and the outer rod 12.

[0063] By providing the above-mentioned first wedge-shaped inclined surface 341 or the second wedge-shaped inclined surface 342, when the wedge-shaped forced block 32 moves in the direction from the second end to the first end, it will cause the locking sleeve 332 to deform radially outward to lock the outer rod 12. That is, when the inner rod 11 drives the screw portion to rotate, when the rotational motion of the inner rod 11 is converted into movement in the direction of extending the outer rod 12, it will cause the wedge-shaped forced block 32 to deform in the direction of locking the outer rod 12, thereby achieving locking of the outer rod 12. This not only facilitates the locking of the inner rod 11 and the outer rod 12, but also, during the locking process, the inner rod 11 extends relative to the outer rod 12, which can further increase the pre-tightening force of the telescopic rod against the first wall and the second wall, making it more convenient to achieve the positioning of the telescopic rod.

[0064] In addition, a wear-resistant layer can be provided on the outer circumference of the wedge-shaped block 32 to improve the stability of the fit between the wedge-shaped block 32 and the locking sleeve 332, thereby extending the service life of the internal locking mechanism 30. Furthermore, the wedge-shaped block 32 can be made flexible, or a flexible layer can be provided on the outer circumference of the wedge-shaped block 32. This provides a certain amount of deformation for the wedge-shaped block 32, further improving the structural strength of the fit between the wedge-shaped block 32 and the locking sleeve 332.

[0065] Alternatively, as Figure 5 The outer circumference of the locking sleeve 332 is provided with a plurality of ribs 333. These ribs 333 are arranged to extend axially along the inner locking mechanism 30 and are spaced apart circumferentially along the inner locking mechanism 30. Furthermore, the outer circumference of the locking sleeve 332 is provided with a plurality of ribs 333, and the ribs 333 gradually increase in height from the end closest to the threaded sleeve 331 as they move away from the threaded sleeve 331. This allows the locking sleeve 332 to movably engage with the outer rod 12 in the axial direction before deformation. After deformation, the locking sleeve 332 and the outer rod 12 are stably positioned, thereby improving the connection stability between the inner rod 11 and the outer rod 12.

[0066] Optionally, the screw portion 311 is configured as a straight screw. This simplifies the structure of the screw assembly 31 and facilitates its production and molding. Furthermore, it simplifies the threaded transmission structure, avoids locking between the screw portion 311 and the threaded sleeve 331, and improves the stability of the internal locking mechanism 30.

[0067] In some embodiments, such as Figure 2 The screw assembly 31 further includes a connecting portion 314, which is connected to the screw portion 311. The connecting portion 314 and the screw portion 311 are arranged axially along the inner locking mechanism 30. The connecting portion 314 is used to connect to the inner rod 11. The radial dimension of the connecting portion 314 is larger than the radial dimension of the screw portion 311, thereby forming a first step between the connecting portion 314 and the screw portion 311. The first step is used to limit the position of the threaded sleeve 331. By providing a step structure, a limiting structure for limiting the position of the threaded segment can be constructed, thereby improving the stability of the mating structure between the threaded segment and the screw portion 311.

[0068] Optionally, a step is provided on the circumference of the connecting portion 314 for docking with the inner tube. Specifically, the connecting portion 314 includes a first portion 3141 and a second portion 3142. The first portion 3141 is further away from the screw portion 311 than the second portion 3142. The first portion 3141 is configured to be sleeved onto the end of the inner rod 11, while the second portion 3142 is connected to the screw portion 311. The radial dimension of the first portion 3141 is smaller than the radial dimension of the second portion 3142, and is configured to form a second step that limits the end of the inner rod 11.

[0069] In addition, if Figure 2The connecting portion 314, the screw portion 311 and the wedge-shaped pressing block 32 are arranged to be distributed along the axial direction of the inner locking mechanism 30. In addition, the outer peripheral surface of the wedge-shaped pressing block 32 is provided with a first wedge-shaped inclined surface 341 whose radial dimension gradually increases in the direction away from the threaded sleeve 331; and / or, at least a portion of the inner peripheral surface of the locking sleeve 332 has a second wedge-shaped inclined surface 342, which gradually expands in the direction away from the threaded sleeve 331 and extends to the end surface of the locking sleeve 332.

[0070] like Figure 6 The present invention further provides a telescopic rod 100 comprising a rod body 10 and the aforementioned internal locking mechanism 30. The rod body 10 comprises an inner rod 11 and an outer rod 12, one end of the inner rod 11 being inserted into the outer rod 12. A screw assembly 31 is connected to the inner rod 11, and a threaded sleeve 331 is configured to move along the threaded rod and drive a wedge-shaped pressing block 32 to push outward against a locking sleeve 332, thereby locking the outer rod 12. By providing the aforementioned internal locking mechanism 30, the corresponding functions of the aforementioned internal locking mechanism 30 can be achieved, and the present invention will not be further described.

[0071] In combination with the above, the relative movement of the inner rod 11 and the outer rod 12 can be used to preliminarily determine the length of the rod body 10. However, there is no pre-tightening force between the rod body 10 and the wall, and it is difficult to support the rod body 10 between the two walls for supporting objects. Therefore, in some embodiments of the present invention, at least one end of the rod body 10 is provided with an adjustable base 20, and the adjustable base 20 includes a base 21, a cover body 22 and an axial locking structure. The cover body 22 is rotatably connected to the base body 21, and a screw-top structure is provided between the cover body 22 and the base body 21. The screw-top structure is configured to convert the rotational motion of the cover body 22 into movement of the base body 21 along the axis. The axial locking structure connects the cover body 22 and the base body 21 to limit the axial displacement of the base body 21 relative to the cover body 22.

[0072] The telescopic rod according to a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0073] Combine Figures 1 to 16 The telescopic rod of the present invention mainly includes: a rod body 10, the rod body 10 includes an inner rod 11 and an outer rod 12, one end of the inner rod 11 is sleeved in the outer rod 12, and an internal locking mechanism is provided, which can lock the inner rod 11 relative to the outer rod 12.

[0074] The rod body 10 is provided with bases at both ends. Preferably, the first base 20a provided at one end of the inner rod 11 is an adjustable base, and the second base 20b provided at the other end is a conventional base or an adjustable base. The adjustable base 20 may have a first socket 221, and the conventional base may have a second socket. The rod body 10 connects to the adjustable base 20 via the first socket 221 and to the conventional base via the second socket to form a complete telescopic rod 100 product, which is installed between two walls.

[0075] The adjustable base 20 includes a positioning portion 25 (gasket or suction cup), a base body 21, and a cover body 22; the positioning portion 25 is fixedly arranged at the end of the base body 21, and the connection and fixation are achieved by a plug-in structure; a screw-top structure is provided between the base body 21 and the cover body 22, and the cover body 22 can rotate relative to the base body 21. When the cover body 22 rotates relative to the base body 21 under the action of external force, the base body 21 can be displaced in the axial direction relative to the cover body 22 under the action of the screw-top structure.

[0076] The base 21 includes a first surrounding wall 212 and a second surrounding wall 213. The first and second surrounding walls 212 and 213 extend upward from the bottom of the base 21 to a certain height. In this embodiment, the first surrounding wall 212 extends upward to a lower height than the second surrounding wall 213. The second surrounding wall 213 is assembled with the inner wall of the cover 22. The cover 22 can rotate around or relative to the first surrounding wall 212 under external force. The cover 22 is provided with a second bottom wall 222, a third surrounding wall 223, and a fourth surrounding wall 224. The third surrounding wall 223 is disposed around the outer circumference of the second surrounding wall 213, and the fourth surrounding wall 224 is disposed around the inner circumference of the first surrounding wall 212.

[0077] Specifically, the screw-on structure includes a first spiral guide surface 231 arranged on the top of the first surrounding wall 212, and a screw-on block 232 arranged on the first bottom wall 211 of the cover body 22. The screw-on block 232 can be integrally formed with the inner wall of the cover body 22 or assembled and disassembled. The screw-on block 232 and the spiral guide surface cooperate to form the screw-on structure.

[0078] The first spiral guide surfaces 231 are preferably multiple (e.g., at least two or more to achieve smooth rotation, preferably three in this embodiment) and are arrayed at the top of the first surrounding wall 212. The first spiral guide surfaces 231 have a low position and a high position 2311. The high position 2311 is provided with a positioning step. Stops 2313 are provided between adjacent first spiral guide surfaces 231 (to limit the rotational travel of the outer cover). The number of screw-top blocks 232 provided corresponds to the number of first spiral guide surfaces 231. After the cover body 22 and the base body 21 are assembled, the screw-top blocks 232 are theoretically initially located at the low position of the first spiral guide surfaces 231.

[0079] If the screw-top block 232 is not at the lowest position of the first spiral guide surface 231, when the inner rod 11 is rotated to lock it relative to the outer surface, the rotation of the inner rod 11 will also drive the cover body 22 to rotate and return to the lowest position (there is friction between the connecting end of the inner rod 11 and the cover body socket, so the rotation of the inner rod 11 will also drive the cover body to rotate);

[0080] When the cover 22 is rotated under the action of an external force, the rotation of the cover 22 causes the screw-on block 232 to slide from the low position 2312 of the first spiral guide surface 231 to the high position 2311, and an axial displacement occurs between the cover 22 and the base 21, thereby extending the length of the entire telescopic rod 100 (i.e., the rotational motion of the cover 22 is converted into a linear / telescopic motion through the screw-on structure), so that the base of the telescopic rod 100 has a greater pressing force applied to the wall (one end of the rod body 10 is connected to the base. When the relative lengths of the inner rod and the outer rod are fixed, further extension and retraction of the adjustable base will increase the overall length of the telescopic rod 100. Furthermore, when the relative distance between the two walls is determined, fine-tuning the overall length of the telescopic rod 100 will increase the pressing force applied to the wall, thereby ensuring that the telescopic rod 100 is firmly supported between the two walls to prevent it from falling).

[0081] Furthermore, the angle between the low position and the high position 2311 of the first spiral guide surface 231 is preferably 5 degrees to 25 degrees, and the distance L between the seat body 21 and the cover body 22 under the action of the screw-top structure is relatively small, which mainly plays the role of fine-tuning and tightening; the gasket / suction cup is preferably made of flexible material, so that it has elastic compression space under the action of the screw-top structure.

[0082] Preferably, an axial locking structure is further provided between the cover body 22 and the base body 21, and the axial locking structure includes a concave column (i.e., a first locking portion 241) provided at the center of the cover body 22, the concave column extending toward the base body 21, i.e., sinking downward) and an undercut (i.e., a second locking portion 242) provided at the center of the second surrounding wall 213, a receiving groove is formed between the undercut and the first surrounding wall 212, the concave column extends toward the base body 21 and is received in the receiving groove; further, a limit sleeve is provided at the center of the concave column, which protrudes upward, and the center of the limit sleeve is a mounting hole provided through it. A plurality of first ribs 2412 are arranged around the inner wall, and the first rib 2412 is provided with a second spiral guide surface 2411; the undercut extends upward from the bottom of the seat body 21 through the mounting hole, and the undercut is provided with a spring buckle 2423, and the maximum outer diameter of the spring buckle 2423 is larger than the diameter of the mounting hole. When the spring buckle 2423 is compressed, it can pass through the through hole. When the spring buckle 2423 is reset, the spring buckle 2423 is axially restricted by the first rib 2412, and the bottom of the spring buckle 2423 is a third spiral guide surface 2421 that cooperates with the second spiral guide surface 2411 of the first rib 2412.

[0083] The axial locking structure can not only lock the cover body 22 and the seat body 21 in the axial direction, but also realize radial limitation. At the same time, because the axial locking structure is also a screw-top structure, it can ensure that the distance of the left and right rotational displacement of the cover body 22 and the seat body 21 is kept at the same distance, thereby maintaining stability. If there is no such structure, there will be shaking / rocking between the seat body 21 and the cover body 22 after the spiral displacement, and the tightening force will not be strong, affecting the user experience. Assuming that the spiral guide rib position of the axial locking structure is not the first spiral guide surface 231 structure, then when the screw-top block 232 on the cover body 22 rotates to the highest position 2311 of the first spiral guide surface 231, the axial locking structure will become relaxed, and the axial locking effect will be greatly reduced.

[0084] The cover 22 is locked on the base 21 by an axial locking structure, but only produces a limiting effect in the axial direction, and the cover 22 can still rotate relative to the base 21.

[0085] Optionally, the inner locking mechanism 30 is configured to lock the inner rod 11 and the outer rod 12 when the inner rod 11 rotates in a first direction, and the screw-on mechanism is configured to eject the base body 21 when the cover body 22 rotates in a second direction, wherein the first direction and the second direction are opposite circumferential directions. In this way, after the lengths of the inner rod 11 and the outer rod 12 are preliminarily determined, the inner rod 11 can be driven to rotate in the first direction to lock the inner rod 11 and the outer rod 12. During the locking process, the rotation of the inner rod 11 in the first direction will drive the cover body 22 to rotate in the first direction, and the rotation of the cover body 22 in the first direction will release the ejection effect on the base body 21, causing the base body 21 to reset, for example, the screw-on block 232 rotates to the lower position of the first spiral guide surface 231.

[0086] The inner locking mechanism 30 of a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0087] The internal locking mechanism 30 of the present invention may include a screw assembly 31 and a locking assembly 33. The screw assembly 31 may include a connecting portion 314, which is embedded in the inner rod 11 and fixedly connected to the end of the inner rod 11. The screw assembly 31 also includes a screw portion 311, a connecting rod portion 312 and a positioning portion 31325, wherein the screw portion 311 can be set as a straight screw portion 311, one end of the connecting rod portion 312 is connected to the screw portion 311, and the other end is connected to the positioning portion 313, and a positioning groove is formed between the connecting rod portion 312 and the positioning portion 313. The screw portion 311 is connected between the connecting rod portion 312 and the connecting portion 314. The outer surface of the screw portion 311 is provided with an external thread. A step is provided between the straight screw and the connecting portion 314 to construct a limit stop. The diameter of the limit stop is larger than the diameter of the screw portion 311; the diameter of the connecting rod portion 312 is smaller than the diameter of the screw portion 311, and the diameter of the positioning portion 31325 is larger than the diameter of the connecting rod portion 312.

[0088] Preferably, the connecting rod portion 312 and the positioning portion 313 are made of metal material to enhance the strength of the tension end and prevent it from being broken after being stressed. The connecting rod portion 312 and the positioning portion 313 can be a bolt structure, which is formed into the screw portion 311 through secondary injection molding or encapsulation technology.

[0089] The locking assembly includes a threaded sleeve 331, a locking sleeve 332, and a wedge-shaped pressing block 32. The locking sleeve 332 is connected to the threaded sleeve 331 of the screw portion 311. The threaded sleeve 331 is provided with an internal thread that mates with the external thread of the screw portion 311. The locking sleeve 332 and the threaded sleeve 331 are integrally formed (or can be assembled from two parts). The locking sleeve 332 has a through hole connected to the threaded sleeve 331, and the inner surface of the through hole is an inverted tapered inner hole.

[0090] The wedge-shaped block 32 (which can consist of two opposing blocks for ease of assembly) is fitted over the screw portion 311. The outer surface of the wedge-shaped block 32 is an inverted tapered cylinder. Operating Principle: Hold the outer rod 12 with your left hand and the inner rod 11 with your right hand, pulling the inner rod 11 outward to determine the length of the rod body 10. Then, rotate the inner rod 11, which drives the straight screw. The inner screw sleeve moves on the straight screw, which in turn drives the pitch locking sleeve 332 to engage with the wedge-shaped block 32. The pitch locking sleeve 332 is stretched and pressed against the inner wall of the outer rod 12, securing it.

[0091] In the present invention, the taper direction of the wedge-shaped pressing block 32 and the locking sleeve 332 can be set to: the taper direction can be set to a taper gradually decreasing toward the inner rod, so that when the inner rod 11 is rotated, it is pulled outward (that is, when the rotation is locked, the overall length of the inner and outer rods 12 will be lengthened but not shortened).

[0092] The following describes the steps (working principle) of using the telescopic rod 100 of the present invention with reference to the accompanying drawings:

[0093] Step 1: If Figure 17 , the second base 20b of the telescopic rod 100 is against the second wall 200b (the base at one end of the outer rod 12);

[0094] Step 2: If Figure 18 The user holds the outer rod 12 with one hand and pulls the inner rod 11 out with the other hand, so that the end face of the first base 20a (the base at one end of the inner rod 11) initially abuts against the first wall 200a. The user rotates the inner rod 11 in the first direction. Under the action of the inner locking mechanism, the inner rod 11 is locked and positioned relative to the outer rod 12. At the same time, driven by the rotation of the inner rod 11, the cover body 22 returns to its original position, that is, the screw-top block 232 rotates to the lower position of the first spiral guide surface 231.

[0095] Step 3: If Figure 19 and Figure 20After the inner rod 11 is locked and positioned relative to the outer rod 12; the cover body 22 is rotated in the second direction (i.e., opposite to the rotation direction of the inner rod 11 when it is locked. At this time, the user needs to hold the inner rod with his other hand so that the inner rod will not be rotated by the cover body). The screw-top block 232 on the cover body 22 rotates from the low position of the first spiral guide surface 231 to the high position 2311, thereby causing the base body 21 to be relatively displaced relative to the cover body 22, and further pressing the gasket, so that the supporting force of the telescopic rod 100 between the wall is greatly enhanced.

[0096] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0098] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0099] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0100] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0101] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An internal locking mechanism for a telescopic rod, the telescopic rod comprising an outer rod and an inner rod with an end portion passing through the outer rod, characterized in that: The inner locking mechanism comprises: a screw assembly configured to connect to the inner rod, the screw assembly comprising a screw portion; a wedge-shaped pressing block connected to the screw assembly; A locking assembly comprising a threaded sleeve and a locking sleeve, wherein the locking sleeve is connected to the threaded sleeve and is at least partially sleeved on the outer circumference of the wedge-shaped forced block. The threaded sleeve is threadedly engaged with the screw portion to convert the rotation of the screw portion into axial movement along the inner locking mechanism, and drive the wedge-shaped forced block to drive the locking sleeve to deform radially along the inner locking mechanism to lock and unlock the outer rod.

2. The inner locking mechanism according to claim 1, characterized in that: The locking sleeve and the threaded sleeve are configured as an integral structure; And / or, the locking sleeve has a plurality of open grooves distributed along the circumferential direction, and the open grooves penetrate the inner circumferential surface, the outer circumferential surface and the end surface facing away from the threaded sleeve of the locking sleeve; And / or, the locking sleeve extends along the axial direction of the threaded sleeve, and one end periphery is connected to the threaded sleeve.

3. The inner locking mechanism according to claim 1, characterized in that: The wedge-shaped pressing block and the screw assembly are configured as a split structure.

4. The inner locking mechanism according to claim 1 or 3, characterized in that: The screw assembly further includes a connecting rod portion and a positioning portion, one end of the connecting rod portion is connected to the screw portion and the other end is connected to the positioning portion, and at least a portion of the wedge-shaped block is positioned between the screw portion and the positioning portion.

5. The inner locking mechanism according to claim 4, characterized in that: The connecting rod portion extends along the axis of the screw portion, one end of the connecting rod portion is bolted to the screw portion and the other end is connected to the positioning portion; And / or, the connecting rod portion and the positioning portion are configured as a bolt, the connecting rod portion is configured as the rod portion of the bolt, and the positioning portion is configured as the head portion of the bolt.

6. The inner locking mechanism according to claim 4, characterized in that: The screw portion is configured as a plastic screw; And / or, the connecting rod portion is configured as a metal connecting rod; And / or, the positioning portion is configured as a metal block.

7. The inner locking mechanism according to claim 1, characterized in that: The outer circumference of the locking sleeve is provided with a plurality of ribs. Wherein, the multiple ribs are arranged to extend along the axial direction of the inner locking mechanism and are distributed at intervals along the circumference of the inner locking mechanism; and / or, the end of the rib close to the threaded sleeve gradually increases in height in the direction away from the threaded sleeve.

8. The inner locking mechanism according to claim 1, wherein: The screw portion is configured as a straight screw.

9. The inner locking mechanism according to claim 1, characterized in that: The wedge-shaped block has a first end close to the inner rod and a second end away from the inner rod, and the outer peripheral surface of the wedge-shaped block includes a first wedge-shaped inclined surface with a gradually increasing radial dimension in a direction from the first end to the second end; And / or, the locking sleeve has a third end close to the inner rod and a fourth end away from the inner rod, and the inner circumferential surface of the locking sleeve includes a second wedge-shaped inclined surface with a radial dimension gradually increasing in a direction from the third end to the fourth end.

10. The inner locking mechanism according to claim 1, characterized in that: The screw assembly further includes a connecting portion, which is connected to the screw portion and distributed along the axial direction of the inner locking mechanism, and is used to connect the inner rod. In which, the radial dimension of the connecting portion is larger than the radial dimension of the screw portion, and is used to construct a first step for limiting the threaded sleeve; and / or, the connecting portion includes a first part and a second part, the first part is farther away from the screw portion than the second part, the first part is used to be sleeved on the end of the inner rod, and the second part is connected to the screw portion, the radial dimension of the first part is smaller than the radial dimension of the second part, and is used to construct a second step for limiting the end of the inner rod.

11. A telescopic rod, characterized in that: include: A rod body, the rod body comprising an inner rod and an outer rod, one end of the inner rod being inserted into the outer rod; The inner locking mechanism according to any one of claims 1 to 10, wherein the screw assembly is connected to the inner rod, and the locking sleeve can be deformed outward to lock the outer rod or deformed inward to release the lock on the outer rod.

12. The telescopic rod according to claim 11, characterized in that At least one end of the rod body is provided with an adjustable base, and the adjustable base includes a base body, a cover body and an axial locking structure. The cover body is rotatably connected to the base body, and a screw-top structure is provided between the cover body and the base body. The screw-top structure is configured to convert the rotational motion of the cover body into movement of the base body along the axis. The axial locking structure connects the cover body and the base body, and is used to limit the axial displacement of the base body relative to the cover body.

13. The telescopic rod according to claim 12, characterized in that: The inner locking mechanism is configured to lock the inner rod and the outer rod when the inner rod rotates around a first direction, and the screw-top structure is configured to eject the seat body when the cover body rotates around a second direction, and the first direction and the second direction are opposite circumferential directions.

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