Internal locking mechanism and telescopic rod

Abstract

An internal locking mechanism and a telescopic rod. The internal locking mechanism comprises a screw assembly, a wedge-shaped pressing block and a locking assembly, wherein the screw assembly is configured to be connected to an inner rod, and the screw assembly comprises a screw portion; the wedge-shaped pressing block is connected to the screw assembly; and the locking assembly comprises a threaded sleeve and a locking sleeve, the locking sleeve being connected to the threaded sleeve, at least part of the locking sleeve being sleeved at the periphery of the wedge-shaped pressing block, and the threaded sleeve being in threaded fit with the screw portion and being configured to convert the rotation of the screw portion into the axial movement thereof along the internal locking mechanism and drive the wedge-shaped pressing block to cause the locking sleeve to deform in the radial direction of the internal locking mechanism, so as to lock and unlock an outer rod. The internal locking mechanism can realize the stable locking of an inner rod and an outer rod of the telescopic rod.

Description

Internal locking mechanism and telescopic rod Technical Field

[0001] This invention relates to the field of daily necessities technology, specifically to an internal locking mechanism and a telescopic rod. Background Technology

[0002] The no-drill telescopic rod is supported between two walls for hanging objects. The telescopic rod in the related technology includes an inner rod and an outer rod, and a tension rod mechanism is set to lock the inner rod and the outer rod. By setting a screw and a threaded sleeve, the screw can be connected to the inner rod, and the tapered screw drives the threaded sleeve to open outward to lock the outer rod, thereby locking the inner rod and the outer rod. The structure is complicated and inconvenient to produce. Summary of the Invention

[0003] One object of the present invention is to provide an internal locking mechanism and a telescopic rod that can achieve stable locking of the inner and outer rods of the telescopic rod and simplify the structure of the internal locking mechanism.

[0004] According to an embodiment of the present invention, an internal locking mechanism for a telescopic rod includes an outer rod and an inner rod with its end passing through the outer rod. The internal locking mechanism includes: a screw assembly configured to connect to the inner rod, the screw assembly including a screw portion; a wedge-shaped clamping block connected to the screw assembly; and a locking assembly including a threaded sleeve and a locking sleeve, the locking sleeve being connected to the threaded sleeve and at least partially sleeved on the outer periphery of the wedge-shaped clamping block. The threaded sleeve is threadedly engaged with the screw portion to convert rotation of the screw portion into axial movement along the internal locking mechanism, and to drive the wedge-shaped clamping block to drive the locking sleeve to deform radially along the internal locking mechanism, thereby locking and unlocking the outer rod.

[0005] The internal locking mechanism of the telescopic rod according to an embodiment of the present invention can achieve stable locking of the inner and outer rods of the telescopic rod and simplify the structure of the internal locking mechanism.

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

[0007] In some embodiments, the locking sleeve and the threaded sleeve are integrated into one structure.

[0008] In some embodiments, the locking sleeve has a plurality of circumferentially distributed openings that penetrate the inner circumferential surface, the outer circumferential surface, and the end face away from the threaded sleeve of the locking sleeve; and / or, the locking sleeve extends axially along the threaded sleeve and one end of its periphery is connected to the threaded sleeve.

[0009] In some embodiments, the wedge-shaped forcing block and the screw assembly are configured as separate structures.

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

[0011] In some embodiments, the connecting rod extends along the axis of the screw portion, one end of the connecting rod 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 shank of the bolt, and the positioning portion is configured as the head of the bolt.

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

[0013] In some embodiments, the outer peripheral surface of the locking sleeve is provided with a plurality of raised ribs, the plurality of raised ribs being arranged to extend axially along the inner locking mechanism and to be distributed at intervals circumferentially along the inner locking mechanism; and / or, the outer peripheral surface of the locking sleeve is provided with a plurality of raised ribs, and the height of the raised ribs near the threaded sleeve gradually increases 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 near 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 radial dimension that gradually increases from the first end to the second end.

[0016] In some embodiments, the locking sleeve has a third end near the inner rod and a fourth end away from the inner rod, and the outer peripheral surface of the locking sleeve includes a second wedge-shaped ramp whose radial dimension gradually increases from the third end to the fourth end.

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

[0018] In some embodiments, the radial dimension of the connecting portion is greater than the radial dimension of the screw portion, for constructing a first step that limits the threaded sleeve; and / or, the connecting portion includes a first portion and a second portion, the first portion being farther away from the screw portion than the second portion, the first portion being used to fit onto the end of the inner rod, the second portion being connected to the screw portion, the radial dimension of the first portion being smaller than the radial dimension of the second portion, for constructing a second step that limits the end of the inner rod.

[0019] According to an embodiment of the present invention, a telescopic rod includes: a rod body, the rod body including an inner rod and an outer rod, one end of the inner rod passing through the outer rod; the aforementioned inner locking mechanism, the screw assembly being connected to the inner rod, and the locking sleeve being deformable outward to lock the outer rod or deformable inward to release the locking of the outer rod.

[0020] In some embodiments, at least one end of the rod is provided with an adjustable base, the adjustable base including a seat, a cover and an axial locking structure, the cover being rotatably connected to the seat, a swivel structure being provided between the cover and the seat, the swivel structure being configured to convert the rotational motion of the cover into the axial movement of the seat, and the axial locking structure connecting the cover and the seat for limiting the axial displacement of the seat relative to the cover.

[0021] In some embodiments, the inner locking mechanism is configured to lock the inner rod and the outer rod when the inner rod rotates about a first direction, and the rotating top structure is configured to push out the seat when the cover rotates about a second direction, wherein 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 rod and outer rod after the inner rod extends to a predetermined length, so as to lock the length of the telescopic rod. The structure is stable and the operation is convenient. Multiple slots on the locking sleeve enable stable contact between the locking sleeve and the inner circumferential surface of the outer rod, improving the stability of the locking structure of the inner and outer rods. The locking sleeve and threaded sleeve are integrated, ensuring the structural strength of the locking assembly even with multiple slots on the locking sleeve, thus extending the service life of the internal locking mechanism. Furthermore, the wedge-shaped clamping block and the screw assembly are separate structures, simplifying the screw assembly structure, improving its molding efficiency, and reducing costs. The wedge-shaped clamping block and the screw assembly can be made of different materials to improve material utilization and avoid waste. The taper of both the locking sleeve and the wedge-shaped clamping block tapers towards the inner rod, so that when the inner rod is rotated for locking, it pulls outwards, meaning that the overall length of the inner and outer rods increases without shortening during rotation. Attached Figure Description

[0023] Figure 1 is a schematic diagram of an internal locking mechanism according to an embodiment of the present invention.

[0024] Figure 2 is an exploded view of the internal locking mechanism according to an embodiment of the present invention.

[0025] Figure 3a is a cross-sectional view of an internal locking mechanism according to an embodiment of the present invention.

[0026] Figure 3b is a cross-sectional view of the internal locking mechanism according to another embodiment of the present invention.

[0027] Figure 4 is an exploded view of the internal locking mechanism according to an embodiment of the present invention.

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

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

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

[0031] Figure 8 is a schematic diagram of the base of an adjustable base according to an embodiment of the present invention.

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

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

[0034] Figure 11 is a partial cross-sectional view of an adjustable base according to an embodiment of the present invention, wherein the swivel block is supported at a high position on the first helical guide surface.

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

[0036] Figure 13 is a magnified view of a portion of area A circled in Figure 12.

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

[0038] Figure 15 is a magnified view of a portion of the area circled in Figure 14.

[0039] Figure 16 is a partial schematic diagram of the base of an adjustable base according to an embodiment of the present invention.

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

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

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

[0043] Figure 20 is a magnified view of a portion of the area circled in Figure 19.

[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, seat body 21, first bottom wall 211, first surrounding wall 212, second surrounding wall 213, flange 214, cover 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 2313, top block 232, first locking part 241, second locking part 242, third spiral guide surface 2421, second spiral guide surface 2411, first rib 24 12, Second rib 2422, Spring buckle 2423, Protrusion 2413, Positioning part 25, Inner locking mechanism 30, Screw assembly 31, Screw part 311, Connecting rod part 312, Positioning part 313, Connecting part 314, First part 3141, Second part 3142, Wedge-shaped pressing block 32, First half 321, First groove part 3211, First long groove 3212, Second half 322, Second groove part 3221, Second long groove 3222, Locking assembly 33, Threaded sleeve 331, Locking sleeve 332, Rib 333, Opening groove 334, First wedge-shaped inclined surface 341, Second wedge-shaped inclined surface 342, First wall 200a, Second wall 200b. Detailed Implementation

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

[0046] As shown in Figures 1 to 3, the present invention provides an inner locking mechanism 30, which 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 inserted therethrough. The inner 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 block 32, and a locking assembly 33. The screw assembly 31 includes a screw portion 311, which can be configured to connect to the inner rod. The wedge-shaped 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, and at least a portion of the locking sleeve 332 is sleeved on the outer periphery of the wedge-shaped block 32. The threaded sleeve 331 is threadedly engaged with the screw portion 311 to convert the 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. This movement drives the wedge-shaped 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 locking of 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 connected to the inner rod 11.

[0049] Initially, 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, rotating the inner rod 11 will cause the screw part 311 to rotate. The locking component 33 is located inside the outer rod 12 and has a certain frictional force with the outer rod 12. The relative rotation of the screw part 311 and the threaded sleeve 331 will be converted into the movement of the screw part 311 or the threaded sleeve 331 along the axial direction of the inner locking mechanism 30. Due to the moving frictional force between the locking component 33 and the outer rod 12, the threaded sleeve 331 will not move. If the screw assembly 311 moves axially or the threaded sleeve 331 moves axially for a certain displacement and then cannot move further, the rotational motion of the screw part 311 will be converted into axial movement. The axial movement of the screw assembly 31 will drive the wedge-shaped pressing block 32 to move axially. The axial movement of the wedge-shaped pressing block 32 will drive the locking sleeve 332 to deform radially. When the locking sleeve 332 deforms 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, and then locking the inner rod 11 and the outer rod 12.

[0050] The inner locking mechanism 30 according to an embodiment of the present invention can be applied to the telescopic rod 100 so as to lock the inner rod 11 and the outer rod 12 after the inner rod 11 of the telescopic rod 100 extends to a predetermined length, so as to lock the length of the telescopic rod 100. The structure is stable and the operation is convenient.

[0051] Furthermore, to facilitate the deformation of the locking sleeve 332 by using the wedge-shaped pressing block 32, the inner diameter of the locking sleeve 332 can be set to be smaller than the outer diameter of the wedge-shaped pressing block 32; or, the inner circumferential surface of the locking sleeve 332 can be set to a shape where the radial dimension varies along the axial direction, and the outer diameter of the wedge-shaped pressing 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 circumferential surface of the wedge-shaped pressing 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, and 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 merely some embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] As shown in Figure 2, in some embodiments, the locking sleeve 332 and the threaded sleeve 331 are integrated into one structure. By integrating the locking sleeve 332 and the threaded sleeve 331, the structure of the inner locking mechanism 30 can be simplified, facilitating its manufacturing and assembly. In addition, the locking sleeve 332 can abut against the inner wall of the outer rod 12 during use. Since the threaded sleeve 331 and the locking sleeve 332 are integrated into one structure, the friction between the locking sleeve 332 and the outer rod 12 will also act 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 part 311 will move under the action of the thread, thereby driving the wedge-shaped forcing block 32 to open the locking sleeve 332, thereby increasing the locking force between the locking sleeve 332 and the outer rod 12.

[0053] Furthermore, as shown in Figures 2 and 5, the locking sleeve 332 has multiple circumferentially distributed opening slots 334, which penetrate the inner circumferential surface, outer circumferential surface, and end face away from the threaded sleeve 331 of the locking sleeve 332. By providing multiple opening slots 334, the locking sleeve 332 can be easily opened using the wedge-shaped forcing block 32, and the deformation of the locking sleeve 332 at different positions along the circumference can be made more consistent. This, in turn, makes the opening degree of different parts of the locking sleeve 332 along the axial direction consistent, so that the friction between the locking sleeve 332 and the outer rod 12 at different positions along the circumference is more uniform. This effectively improves the connection strength between the inner locking mechanism 30 and the outer rod 12, and achieves stable locking of the inner rod 11 and the outer rod 12.

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

[0055] Additionally, the locking sleeve 332 can be configured to extend axially along the threaded sleeve 331, and one end of the threaded sleeve 331 is connected to the threaded sleeve 331. Both the locking sleeve 332 and the threaded sleeve 331 surround the screw assembly 31 and extend along the axial direction of the inner locking mechanism 30. The screw assembly 31 may include a connecting portion 314 for connecting the inner tube. The locking sleeve 332 can be located on the side of the threaded sleeve 331 and away from the connecting portion 314 relative to the threaded sleeve 331.

[0056] As shown in Figures 2 to 4, in some embodiments, the wedge-shaped clamping block 32 and the screw assembly 31 are designed as separate structures. This simplifies the shape of the screw assembly 31 and facilitates its manufacturing and forming. Furthermore, during operation, the wedge-shaped clamping block 32 needs to rub against the locking sleeve 332, which may cause wear on both. Therefore, by designing the wedge-shaped clamping block 32 and the screw assembly 31 as separate structures, it is easier to optimize the design of the wedge-shaped clamping block 32, such as by performing surface treatment to increase its wear resistance. This effectively improves the stability of the fit between the wedge-shaped clamping block 32 and the locking block.

[0057] Additionally, as shown in Figure 2, the wedge-shaped clamping 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 3211, and the second half 322 includes a second groove 3221. The first half 321 and the second half 322 are assembled on both sides of the connecting rod portion and surround and hug the connecting rod portion. Furthermore, the bottom surface of the first groove 3211 is provided with a first long groove 3212, and the bottom surface of the second groove 3221 is provided with a second long groove 3222 to facilitate the deformation of the first half 321 and the second half 322.

[0058] As shown in Figures 2 and 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 can be constructed around the connecting rod portion 312 between the screw portion 311 and the positioning portion 313. At least a portion of the wedge-shaped pressing block 32 can be positioned between the screw portion 311 and the positioning portion 313. This facilitates the assembly of the wedge-shaped pressing block 32 with the screw assembly 31, allowing the screw assembly 31 to drive the wedge-shaped pressing block 32 to move, thereby improving the connection strength and stability between the screw assembly 31 and the wedge-shaped pressing block 32. The wedge-shaped block 32 is separately mounted on the rod 312. The wedge-shaped block 32 will not rotate synchronously with the screw assembly 31 but will only move axially, thus avoiding frictional resistance in the rotational direction between the wedge-shaped block 32 and the first wedge-shaped inclined surface 341, and thus preventing jamming due to frictional resistance in the rotational direction.

[0059] As shown in Figure 3b, in some embodiments, the connecting rod extends along the axis of the screw portion 311, with one end of the connecting rod bolted to the screw portion 311 and the other end connected to the positioning portion 31325. Optionally, the connecting rod and the positioning portion 31325 are configured as a bolt, with the connecting rod forming the shank of the bolt and the positioning portion 31325 forming the head of the bolt. This facilitates the forming and connection of the connecting rod 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 further facilitates the fabrication and forming of the bolt assembly and improves the positioning stability of the wedge-shaped clamping block 32.

[0061] As shown in Figure 3, in some embodiments, the wedge-shaped block 32 has a first end near 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, the first wedge-shaped inclined surface 341 having a radial dimension that gradually increases from the first end to the second end.

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

[0063] By setting the first wedge-shaped inclined surface 341 or the second wedge-shaped inclined surface 342, when the wedge-shaped pressing block 32 moves 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 part to rotate, when the rotational motion of the inner rod 11 is converted into a movement in the direction of extending the outer rod 12, it will cause the wedge-shaped pressing block 32 to deform in the direction of locking the outer rod 12, thereby realizing the locking of the outer rod 12. This not only makes it easy to lock 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, and make it easier to position the telescopic rod.

[0064] In addition, a wear-resistant layer can be provided on the outer peripheral surface of the wedge-shaped pressing block 32 to improve the stability of the fit between the wedge-shaped pressing block 32 and the locking sleeve 332, and extend the service life of the inner locking mechanism 30. Alternatively, the wedge-shaped pressing block 32 can be made flexible, or a flexible layer can be provided on its outer peripheral surface. This allows for a certain amount of deformation of the wedge-shaped pressing block 32, further improving the structural strength of the fit between the wedge-shaped pressing block 32 and the locking sleeve 332.

[0065] Optionally, as shown in Figure 5, the outer peripheral surface of the locking sleeve 332 is provided with a plurality of raised ribs 333, which extend axially along the inner locking mechanism 30 and are distributed at intervals circumferentially along the inner locking mechanism 30. Further, the outer peripheral surface of the locking sleeve 332 is provided with a plurality of raised ribs 333, and the height of the raised ribs 333 gradually increases from the end near the threaded sleeve 331 to the direction away from the threaded sleeve 331. This allows the outer rod 12 to be movably engaged with the inner rod 12 axially before the locking sleeve 332 deforms, and after deformation, it enables stable positioning of the locking sleeve 332 and the outer rod 12, improving the connection stability between the inner rod 11 and the outer rod 12.

[0066] Optionally, the screw portion 311 is designed as a straight screw. This simplifies the structure of the screw assembly 31 and facilitates its production and molding. Furthermore, it simplifies the threaded drive structure, prevents 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, as shown in FIG2, the screw assembly 31 further includes a connecting portion 314, which is connected to the screw portion 311 and the connecting portion 314 and the screw portion 311 are distributed along the axial direction of the inner locking mechanism 30. The connecting portion 314 is used to connect the inner rod 11. The radial dimension of the connecting portion 314 is larger than the radial dimension of the screw portion 311, thereby constructing a first step between the connecting portion 314 and the screw portion 311. The first step is used to limit the threaded sleeve 331. By setting the step structure, a limiting structure for limiting the threaded segment can be constructed, which can improve the stability of the mating structure between the threaded segment and the screw portion 311.

[0068] Optionally, the circumferential surface of the connecting portion 314 is provided with a step for engaging with the inner tube. Specifically, the connecting portion 314 includes a first portion 3141 and a second portion 3142. The first portion 3141 is farther away from the screw portion 311 than the second portion 3142. The first portion 3141 is used to fit onto the end of the inner rod 11, and 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, which is used to construct a second step that limits the end of the inner rod 11.

[0069] Additionally, as shown in Figure 2, the 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. Furthermore, the outer peripheral surface of the wedge-shaped pressing block 32 is provided as 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 face of the locking sleeve 332.

[0070] As shown in Figure 6, the present invention also provides a telescopic rod 100, including a rod body 10 and the aforementioned inner locking mechanism 30. The rod body 10 includes an inner rod 11 and an outer rod 12, with one end of the inner rod 11 passing through the outer rod 12. A screw assembly 31 is connected to the inner rod 11, and a threaded sleeve 331 is used to move along the threaded rod and drive the wedge-shaped forcing block 32 to push outward and open the locking sleeve 332, thereby locking it to the outer rod 12. By setting the aforementioned inner locking mechanism 30, the corresponding functions of the aforementioned inner locking mechanism 30 can be achieved, which will not be elaborated further in this invention.

[0071] In conjunction with the foregoing, the length of the rod 10 can be initially determined by the relative movement of the inner rod 11 and the outer rod 12. However, since there is no pre-tension between the rod 10 and the wall, it is difficult to support the rod 10 between the two walls for supporting items. Therefore, in some embodiments of the present invention, at least one end of the rod 10 is provided with an adjustable base 20. The adjustable base 20 includes a seat 21, a cover 22 and an axial locking structure. The cover 22 is rotatably connected to the seat 21. A swivel structure is provided between the cover 22 and the seat 21. The swivel structure is configured to convert the rotational movement of the cover 22 into the movement of the seat 21 along the axis. The axial locking structure connects the cover 22 and the seat 21 and is used to limit the axial displacement of the seat 21 relative to the cover 22.

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

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

[0074] The pole 10 has bases at both ends. Preferably, the first base 20a at one end of the inner pole 11 is an adjustable base, and the second base 20b at the other end is either a regular base or an adjustable base. The adjustable base 20 may have a first insertion hole 221, and the regular base may have a second insertion hole. The pole 10 is connected to the adjustable base 20 through the first insertion hole 221 and to the regular base through the second insertion hole to form a complete telescopic pole 100 product, which is installed between two walls.

[0075] The adjustable base 20 includes a positioning part 25 (pad or suction cup), a base body 21, and a cover body 22. The positioning part 25 is fixedly disposed at the end of the base body 21 and is connected and fixed by a plug-in structure. A rotating top structure is provided between the base body 21 and the cover body 22. 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 an external force, the rotating top structure can cause the base body 21 to be displaced relative to the cover body 22 in the axial direction.

[0076] The seat 21 includes a first surrounding wall 212 and a second surrounding wall 213. The first surrounding wall 212 and the second surrounding wall 213 extend upward from the bottom of the seat 21 to a certain height. In this embodiment, the upward extension height of the first surrounding wall 212 is lower than that of the second surrounding wall 213. The second surrounding wall 213 is fitted with the inner wall of the cover 22. The cover 22 can rotate around / relative to the first surrounding wall 212 under the drive of an 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 arranged around the outer periphery of the second surrounding wall 213, and the fourth surrounding wall 224 is arranged around the inner periphery of the first surrounding wall 212.

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

[0078] Preferably, there are multiple first spiral guide surfaces 231 (e.g., at least two or more to achieve smooth rotation; in this embodiment, three are preferred), arranged in an array on the top of the first surrounding wall 212. Each first spiral guide surface 231 has a low position and a high position 2311. The high position 2311 is provided with a positioning step, and a stop portion 2313 (used to limit the rotation stroke of the outer cover) is provided between adjacent first spiral guide surfaces 231. The number of top screw blocks 232 corresponds to the number of first spiral guide surfaces 231. After the cover 22 and the seat 21 are assembled, the initial position of the top screw blocks 232 is theoretically located at the low position of the first spiral guide surfaces 231.

[0079] If the top block 232 is not at the lowest position of the first spiral guide surface 231, when the inner rod 11 is locked relative to the outer surface, the rotation of the inner rod 11 will also drive the cover 22 to rotate back to the lowest position (there is friction between the connecting end of the inner rod 11 and the insertion hole of the cover, so the rotation of the inner rod 11 will also drive the cover to rotate).

[0080] Under the action of external force, the cover 22 is rotated. The rotation of the cover 22 will cause the top block 232 to slide from the low position 2312 of the first spiral guide surface 231 to the high position 2311. The cover 22 and the base 21 will be displaced in the axial direction, thereby extending the length of the entire telescopic rod 100 (that is, through the top structure, the rotational motion of the cover 22 is converted into linear / telescopic motion), so that the base of the telescopic rod 100 has a greater clamping force applied to the wall (one end of the rod 10 is connected to the base. When the relative lengths of the inner rod and the outer rod are fixed, the further extension and retraction of the adjustable base will increase the overall length of the telescopic rod 100. Furthermore, when the specific relative lengths between the two walls are determined, the slight increase in the overall length of the telescopic rod 100 will increase the clamping force applied to the wall, thereby ensuring that the telescopic rod 100 is firmly supported between the two walls and avoids falling).

[0081] Furthermore, the included angle between the lower and upper positions of the first spiral guide surface 231 is preferably 5 degrees to 25 degrees. The distance L generated between the seat 21 and the cover 22 under the action of the rotating top structure is relatively small, mainly playing the role of fine adjustment and tightening. The gasket / suction cup is preferably made of flexible material, so that it has elastic compression space under the action of the rotating top structure.

[0082] Preferably, an axial locking structure is further provided between the cover 22 and the seat 21. The axial locking structure includes a recessed post (i.e., the first locking part 241) located at the center of the cover 22, which extends toward the seat 21 and sinks downwards, and an undercut (i.e., the second locking part 242) located at the center of the second surrounding wall 213. The undercut and the first surrounding wall 212 form a receiving groove, and the recessed post extends toward the seat 21 and is received in the receiving groove. Furthermore, a limiting sleeve is provided with an upward protrusion at the center of the recessed post, and the center of the limiting sleeve is a through mounting hole. The inner wall is surrounded by several first ribs 2412, and the first ribs 2412 are provided with second spiral guide surfaces 2411. The inverted buckle extends upward from the bottom of the seat body 21 and passes through the mounting hole. The inverted buckle is provided with a spring buckle 2423. 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 restricted axially by the first ribs 2412. 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 ribs 2412.

[0083] The axial locking structure can not only lock the cover 22 and the seat 21 in the axial direction, but also limit them in the radial direction. At the same time, because the axial locking structure is also a screw-on structure, it can ensure that the left and right rotational displacement distances of the cover 22 and the seat 21 are kept at the same distance, thus maintaining stability. Without this structure, the seat 21 and the cover 22 would wobble / shake after the helical displacement, resulting in weak clamping force and affecting the user experience. Assuming that the helical guide rib of the axial locking structure is not the structure of the first helical guide surface 231, when the screw-on block 232 on the cover 22 rotates to the highest position 2311 of the first helical guide surface 231, the axial locking structure will become loose, and the axial locking effect will be greatly reduced.

[0084] The cover 22 is locked to the seat 21 by an axial locking structure, but it only limits the movement in the axial direction. The cover 22 can still rotate relative to the seat 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 around the first direction, and the rotating top structure is configured to push out the seat 21 when the cover 22 rotates around the second direction, where the first direction and the second direction are opposite circumferential directions. In this way, once the lengths of the inner rod 11 and the outer rod 12 are initially determined, the inner rod 11 can be driven to rotate along 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 along the first direction will drive the cover 22 to rotate along the first direction, and the rotation of the cover 22 along the first direction will release the pushing action on the seat 21, and the seat 21 will reset, for example, the rotating top block 232 will rotate to the low position of the first helical guide surface 231.

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

[0087] The inner 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 part 314, which is embedded in the inner rod 11 and fixedly connected to the end of the inner rod 11. The screw assembly 31 may also include a screw part 311, a connecting rod part 312 and a positioning part 31325. The screw part 311 may be a straight screw part 311. One end of the connecting rod part 312 is connected to the screw part 311 and the other end is connected to the positioning part 313. A positioning groove is formed between the connecting rod part 312 and the positioning part 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 external threads. A step is provided between the straight screw and the connecting portion 314 to construct a limiting stop. The diameter of the limiting 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. 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 to improve the strength of the tensioned end and prevent it from being stretched under stress. The connecting rod portion 312 and the positioning portion 313 can be a bolt structure, formed into the screw portion 311 by secondary injection molding or overmolding process.

[0089] The locking assembly includes a threaded sleeve 331, a locking sleeve 332, and a wedge-shaped clamping block 32. The locking sleeve 332 is connected to the threaded sleeve 331 sleeved on the screw part 311. The threaded sleeve 331 has an internal thread that engages with the external thread of the screw part 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 that communicates with the threaded sleeve 331. The inner surface of the through hole is an inverted conical inner hole.

[0090] A wedge-shaped clamping block 32 (which may include two opposing blocks for easy assembly) is fitted onto the screw section 311. The outer surface of the wedge-shaped clamping block 32 is an inverted conical cylinder. Working principle: Hold the outer rod 12 with your left hand and the inner rod 11 with your right hand. Pull the inner rod 11 outward to determine the length of the rod body 10. Then rotate the inner rod 11 to drive the straight screw to rotate. The inner screw sleeve moves on the straight screw, which in turn drives the inclined locking sleeve 332 to cooperate with the wedge-shaped clamping block 32. The inclined locking sleeve 332 is opened and pressed against the inner wall of the outer rod 12 for fixation.

[0091] In this invention, the taper direction of the wedge-shaped pressing block 32 and the locking sleeve 332 can be set as follows: the taper direction can be set as a tapered taper that gradually narrows towards the inner rod, so that when the inner rod 11 is rotated, it is pulled outward (that is, when rotating and locking, the overall length of the inner and outer rods 12 will become longer rather than shorter).

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

[0093] Step 1: As shown in Figure 17, the second base 20b of the telescopic rod 100 is abutted against the second wall 200b (one end of the outer rod 12).

[0094] Step 2: As shown in 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 inner rod 11 is rotated 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 22 is reset to the original position, that is, the top block 232 rotates to the low position of the first spiral guide surface 231.

[0095] Step 3: As shown in Figures 19 and 20, after the inner rod 11 is locked and positioned relative to the outer rod 12, rotate the cover 22 in the second direction (that is, the opposite direction of the rotation to the locking of the inner rod 11; at this time, the user needs to hold the inner rod with his other hand so that the inner rod is not rotated by the cover). The rotating block 232 on the cover 22 rotates from the low position of the first spiral guide surface 231 to the high position 2311, thereby causing the seat 21 to have a relative displacement relative to the cover 22, and further pressing the pad, so that the supporting force of the telescopic rod 100 between the walls is greatly enhanced.

[0096] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0098] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0099] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to 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 having its end passing through the outer rod, characterized in that, The internal locking mechanism includes: A screw assembly configured to connect an inner rod, the screw assembly including a screw portion; A wedge-shaped clamping block, which is connected to the screw assembly; A 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 periphery of the wedge-shaped pressing 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 to drive the wedge-shaped pressing block to drive the locking sleeve to deform radially along the inner locking mechanism, so as to lock and unlock the outer rod.

2. The internal locking mechanism according to claim 1, characterized in that, The locking sleeve and the threaded sleeve are integrated into one structure; And / or, the locking sleeve has a plurality of circumferentially distributed openings that penetrate the inner circumferential surface, the outer circumferential surface, and the end face away from the threaded sleeve of the locking sleeve; And / or, the locking sleeve extends axially along the threaded sleeve, and one end of the sleeve is peripherally connected to the threaded sleeve.

3. The internal locking mechanism according to claim 1, characterized in that, The wedge-shaped forcing block and the screw assembly are designed as separate structures.

4. The internal 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 internal locking mechanism according to claim 4, characterized in that, The connecting rod extends along the axis of the screw portion, one end of the connecting rod 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 shank of the bolt, and the positioning portion is configured as the head of the bolt.

6. The internal locking mechanism according to claim 4, characterized in that, The screw section is made of plastic. And / or, the connecting rod portion is a metal connecting rod; And / or, the positioning part is a metal block.

7. The internal locking mechanism according to claim 1, characterized in that, The outer circumferential surface of the locking sleeve is provided with multiple raised ribs. Wherein, the plurality of protruding ribs are arranged to extend axially along the inner locking mechanism and are distributed at intervals circumferentially along the inner locking mechanism; and / or, the height of the protruding ribs near the threaded sleeve gradually increases in the direction away from the threaded sleeve.

8. The internal locking mechanism according to claim 1, characterized in that, The screw section is designed as a straight screw.

9. The internal locking mechanism according to claim 1, characterized in that, The wedge-shaped block has a first end near 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 whose radial dimension gradually increases from the first end to the second end; And / or, the locking sleeve has a third end near 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 whose radial dimension gradually increases from the third end to the fourth end.

10. The internal 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. The connecting portion is used to connect the inner rod. Wherein, the radial dimension of the connecting portion is greater than the radial dimension of the screw portion, for constructing a first step that limits the threaded sleeve; and / or, the connecting portion includes a first part and a second part, the first part being farther away from the screw portion than the second part, the first part being used to fit onto the end of the inner rod, the second part being connected to the screw portion, the radial dimension of the first part being smaller than the radial dimension of the second part, for constructing a second step that limits the end of the inner rod.

11. A telescopic pole, characterized in that, include: A rod body, comprising an inner rod and an outer rod, wherein one end of the inner rod passes through the outer rod; The inner locking mechanism according to any one of claims 1-10, wherein the screw assembly is connected to the inner rod, and the locking sleeve is deformable outward to lock the outer rod or deformable inward to release the locking of the outer rod.

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

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 rotating top structure is configured to push out the seat when the cover rotates around a second direction, wherein the first direction and the second direction are opposite circumferential directions.

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