Telescopic rod for installing electrical appliance knob

Abstract

The present invention relates to a telescopic rod for installing an electrical appliance knob, comprising an outer fixed tube with at least one edge, an inner telescopic column slidably installed in the outer fixed tube, a closed end of the outer fixed tube abutting against the inner telescopic column through a spring, a limit block is arranged on the outer side wall of the inner telescopic column, an elastic buckle is arranged near the opening of the outer fixed tube and is engaged with the limit block, an installation groove for installing an external knob is provided at one end of the inner telescopic column away from the spring, a sliding groove is arranged on the outer side wall of the inner telescopic column, the sliding groove comprises a lower pressure groove and a rebound groove, a pressing block is arranged on the outer side wall of the inner telescopic column, the pressing block is located between the lower pressure groove and the rebound groove, a clamping groove is arranged at one end of the pressing block near the installation groove, a swing hook is rotatably installed on the inner side wall of the outer fixed tube, and a clamping block engaged with the clamping groove is arranged on the swing hook. The present invention can place a knob on an electrical appliance inside the electrical appliance, making the electrical appliance more beautiful, and has the advantage of preventing the knob from being accidentally touched.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary structures for electrical appliance knobs, and in particular to a telescopic rod for installing electrical appliance knobs. Background Art

[0002] In existing electrical appliances with knobs, the knobs are usually exposed outside the electrical appliances. This design makes it easy to adjust the electrical appliances by turning the knobs.

[0003] A Chinese utility model patent with application number CN201821184095.7 discloses a rotary button in an oven, including an outer knob, an inner knob, a light-emitting circuit board, a knob seat, a valve stem sleeve and an LED lamp, wherein the inner knob is inserted into the outer knob, the LED lamp is fixed on the inner knob, and the LED lamp is connected to the light-emitting circuit board, the light-emitting circuit board is fixed in the knob seat by a pin, the inner knob is inserted into the knob seat, and one end of the inner knob passes through the knob seat and is inserted into the valve stem sleeve.

[0004] The utility model disclosed in the above application document increases the structural strength of the rotating installation by setting two inner and outer knobs, and the positioning effect between the inner knob and the knob seat and the valve stem sleeve is good and not easy to be misplaced. However, in actual use, this design method not only affects the aesthetics of the electrical appliance, but also easily causes the problem of accidental contact due to the protrusion of the knob and the installation of the knob seat. Therefore, a new solution is needed to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a telescopic rod for installing an electrical appliance knob.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0007] The cam is an elastic member which is engaged with the inner sleeve and is adapted to engage with the outer sleeve of the outer sleeve when the cam is engaged.

[0008] By adopting the above technical solution, the telescopic rod is in a natural state, and the spring is in a contracted state. At this time, the clamping block and the clamping groove are clamped with each other, the inner telescopic column is contracted in the outer fixed tube, and the knob installed on the installation groove is located inside the surface of the electrical appliance, so that the surface of the electrical appliance is in a smooth and flat state. When the electrical appliance needs to be adjusted by turning the knob, by pressing the knob, the spring is compressed, so that the inner telescopic column first moves a distance toward the closed end of the outer fixed tube, so that the clamping block withdraws from the clamping groove, and then the knob is released. The spring uses its own elasticity to drive the inner telescopic column to move toward the opening direction of the outer fixed tube. At the same time, the clamping block on the swing hook slides out of the rebound groove until the limit clamping block is clamped with the elastic buckle, and the movement of the inner telescopic column stops. By turning the knob, the electrical appliance can be adjusted. After the electrical appliance is adjusted, press the knob again, the spring is compressed, and the inner telescopic column moves toward the closed end of the outer fixed tube. At the same time, the clamping block on the swing hook enters the lower pressing groove. Release the knob, and the clamping block moves toward the pressing block due to the elastic effect of the spring and clamps with the clamping groove. At this time, the telescopic rod returns to its natural state. The coordination between the clamping block, the clamping groove and the sliding groove, as well as the use of the spring, enables the telescopic rod to have the functions of contraction and reset, which can shrink the knob on the electrical appliance into the surface of the electrical appliance, making the surface of the electrical appliance look smoother and more beautiful. The sliding coordination between the outer fixed tube and the inner telescopic column can also meet the function of the knob to adjust the machine. At the same time, the telescopic rod can retract the knob into the electrical appliance and avoid the phenomenon of accidental touch during the use of the electrical appliance, thereby improving the user experience when the electrical appliance is used. The telescopic rod is easy and quick to use and replace, and has a low production cost.

[0009] In a preferred example, the present invention can be further configured as follows: a plurality of limiting plates for limiting the swing hook are arranged on the inner side wall of the outer fixed cylinder.

[0010] By adopting the above technical solution, when the inner telescopic column slides in the outer fixed tube, the clamping block on the swing hook slides in the sliding groove, and the limiting plate limits the end of the swing hook away from the clamping groove, so that during the sliding process of the inner telescopic column, the swing hook is always between the limiting plate and the wall of the outer fixed tube, preventing the clamping block from sliding out of the sliding groove, making the sliding between the swing hook and the inner telescopic column smoother, thereby improving the stability of the telescopic rod during the telescopic process.

[0011] In a preferred example, the present invention can be further configured as follows: a support portion for supporting the swing hook is provided at one end of the swing hook close to the clamping block.

[0012] By adopting the above technical solution, when the inner telescopic column slides in the outer fixed tube, the clamping block on the swing hook slides in the sliding groove, and at the same time, the support part moves synchronously with the swing hook in the sliding groove. During the movement of the clamping block, the support part plays an auxiliary supporting role for the clamping block, preventing the swing hook from detaching from the outer fixed tube, making the installation of the swing hook more stable, and at the same time, making the movement of the clamping block smoother and more stable, thereby improving the sliding effect between the inner telescopic column and the outer fixed tube.

[0013] In a preferred example, the present invention can be further configured as follows: a guide groove is provided on the inner side wall of the outer fixed cylinder, and a guide block slidably matched with the guide groove is provided on the outer side wall of the inner telescopic column.

[0014] By adopting the above technical solution, a guide groove is provided on the inner side wall of the outer fixed tube, and a guide block slidingly matched with the guide groove is provided on the outer side wall of the inner telescopic column. When the inner telescopic column slides in the outer fixed tube, the guide block follows the inner telescopic column to slide in the guide groove. The sliding match between the guide block and the guide groove, on the one hand, guides the movement of the inner telescopic column, making the sliding of the inner telescopic column more stable and firm, and on the other hand, the cooperation between the two prevents the inner telescopic column from rotating relative to each other in the outer fixed tube, ensuring that the clamping block slides stably in the sliding groove.

[0015] In a preferred example, the present invention can be further configured as follows: a reinforcing rib is provided on the outer side wall of the inner telescopic column, a limiting strip is provided on the end of the reinforcing rib away from the inner telescopic column, and a limiting groove slidably matched with the limiting strip is provided on the inner side wall of the outer fixed tube.

[0016] By adopting the above technical solution, reinforcing ribs are arranged on the inner telescopic column, limiting strips are arranged on the reinforcing ribs, and limiting grooves that slide and cooperate with the limiting strips are opened on the inner side wall of the outer fixed tube. When the inner telescopic column slides in the outer fixed tube, the limiting strips follow the inner telescopic column and slide synchronously in the limiting grooves. The sliding cooperation between the limiting strips and the limiting grooves limits the sliding of the inner telescopic column, preventing the inner telescopic column from rotating on the inner side wall of the outer fixed tube, making the sliding of the inner telescopic column more stable; at the same time, the reinforcing ribs increase the cooperation strength between the inner telescopic column and the outer fixed tube, making the inner telescopic column more stable and firm when driving the outer fixed tube to rotate, improving the overall strength of the telescopic rod and increasing the service life of the telescopic rod.

[0017] In a preferred example, the present invention can be further configured as follows: a plug-in column is provided at one end of the outer fixed tube near its closed part, a plug-in groove is provided at one end of the inner telescopic column near the plug-in column, one end of the spring is sleeved on the plug-in column, and the other end is located in the plug-in groove.

[0018] By adopting the above technical solution, when the spring is installed, one end of the spring is sleeved on the side wall of the plug-in column, and the other end is inserted into the plug-in slot and abuts against the bottom of the slot. This installation method increases the stability of the spring during the expansion and contraction process, prevents the spring from being misplaced or not firmly abutted during the sliding process of the inner telescopic column, and improves the stability of the inner telescopic column sliding in the outer fixed tube.

[0019] In a preferred example, the present invention can be further configured as follows: a mounting hole for facilitating the installation of the swing hook is provided through one closed end of the external fixing tube.

[0020] By adopting the above technical solution, when the telescopic rod needs to be repaired or disassembled, especially when the swing hook needs to be removed from the external fixing tube, if the swing hook is directly disassembled from the opening of the external fixing tube, the disassembly process is relatively troublesome, which seriously affects the disassembly efficiency. A mounting hole is opened at one closed end of the external fixing tube, and the swing hook can be directly disassembled from the closed end of the external fixing tube, and the swing hook can be taken out through the mounting hole. The mounting hole makes the disassembly and installation of the swing hook more convenient and labor-saving, facilitates the inspection and disassembly of the telescopic rod, and improves the disassembly efficiency.

[0021] In a preferred example, the present invention can be further configured as follows: a rotating hole is provided on the side wall of the external fixed cylinder, a rotating shaft rotatably matched with the rotating hole is provided at one end of the swing hook away from the clamping block, and an inclined groove is extended on the hole wall of the mounting hole to facilitate the rotating shaft to enter the mounting hole.

[0022] By adopting the above technical solution, when the swing hook is installed on the external fixed tube, the rotating shaft on the swing hook needs to be inserted into the rotating hole. Since the telescopic rod is small in size and the swing hook needs to be installed in the external fixed tube, it is not convenient to operate with the rotating shaft, so the rotating shaft is not convenient to insert into the rotating hole. An inclined groove is provided on the hole wall of the installation hole. When the swing hook is installed, the rotating shaft on the swing hook is first aligned with the inclined groove, and then the swing hook is pushed into the external fixed tube. The rotating shaft can be inserted into the rotating hole during the pushing process. The inclined groove facilitates the docking of the rotating shaft with the rotating hole, facilitates the installation of the swing hook, is more convenient and quick to use, and improves the efficiency of the installation of the swing hook.

[0023] In a preferred example, the present invention can be further configured as follows: a notch is provided at one end of the external fixing tube close to its opening to facilitate opening of the elastic buckle.

[0024] By adopting the above technical solution, when the telescopic rod needs to be repaired or disassembled, the inner telescopic column needs to be taken out from the outer fixed tube. Since the elastic buckle and the limit block are mutually engaged, it is not convenient to directly pull the inner telescopic column out of the outer fixed tube when the inner telescopic column is taken out. On the other hand, if the inner telescopic column is directly pulled out of the outer fixed tube by brute force, the limit block and the elastic buckle are easily damaged. A notch is provided at the opening of the outer fixed tube. When the inner telescopic column is taken out from the outer fixed tube, the elastic buckle can be first stretched into the notch with a finger to break the elastic buckle in the direction away from the limit block, so that the elastic buckle and the limit block are separated by one end, and then the inner telescopic column is pulled out. The notch facilitates the separation of the inner telescopic column and the outer fixed tube, and facilitates the repair and disassembly of the telescopic column. The design is more convenient and reasonable.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects:

[0026] 1. The cooperation among the clamping block, the clamping groove and the sliding groove, and the use of the spring, enable the telescopic rod to have the functions of contraction and reset, and can shrink the knob on the electrical appliance into the surface of the electrical appliance, making the surface of the electrical appliance look smoother and more beautiful, and the sliding cooperation between the outer fixed tube and the inner telescopic column can also meet the function of the knob to adjust the machine; at the same time, the telescopic rod can shrink the knob into the electrical appliance and avoid the phenomenon of accidental touch during the use of the electrical appliance, thereby improving the user experience when the electrical appliance is used. The telescopic rod is convenient and quick to use and replace, and the production cost is low;

[0027] 2. By providing a guide groove on the inner side wall of the outer fixed tube and a guide block that slides with the guide groove on the outer side wall of the inner telescopic column, when the inner telescopic column slides in the outer fixed tube, the guide block follows the inner telescopic column to slide in the guide groove. The sliding cooperation between the guide block and the guide groove, on the one hand, guides the movement of the inner telescopic column, making the sliding of the inner telescopic column more stable and firm, and on the other hand, the cooperation between the two prevents the inner telescopic column from rotating relatively in the outer fixed tube, ensuring that the clamping block slides stably in the sliding groove;

[0028] 3. An inclined groove is provided on the hole wall of the mounting hole, which facilitates the docking of the rotating shaft with the rotating hole and the installation of the swing hook, making the use more convenient and quick, and improving the efficiency of the swing hook installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an overall schematic diagram of the spring in the present invention in a relaxed state;

[0030] Figure 2 is a cross-sectional schematic diagram of the spring in the present invention in a compressed state;

[0031] Figure 3It is a structural schematic diagram of the matching relationship between the inner telescopic column and the swing hook in the present invention.

[0032] Figure numerals: 1. External fixed cylinder; 2. Internal telescopic column; 3. Plug-in column; 4. Plug-in slot; 5. Spring; 6. Mounting slot; 7. Limiting block; 8. Elastic buckle; 9. Notch; 10. Guide slot; 11. Guide block; 12. Reinforcing rib; 13. Limiting strip; 14. Limiting slot; 15. Swing hook; 16. Rotating hole; 17. Rotating shaft; 18. Mounting hole; 19. Inclined slot; 20. Sliding slot; 201. Pressing slot; 202. Rebound slot; 21. Snap-in block; 22. Tightening block; 23. Snap-in slot; 24. Limiting piece; 25. Support part. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0034] Reference Figure 1 and Figure 2 As shown, a telescopic rod for installing an electrical appliance knob disclosed in the present invention comprises a semi-cylindrical outer fixed tube 1, the outer fixed tube 1 being a structure with one end open and the other end closed, and an inner telescopic column 2 slidably matched therewith is installed in the outer fixed tube 1. A cylindrical plug-in column 3 is integrally formed near the closed end of the outer fixed tube 1, and a circular plug-in groove 4 is provided at the end of the inner telescopic column 2 near the plug-in column 3, and the plug-in column 3 is coaxially arranged with the plug-in tube. A spring 5 is installed between the closed end of the outer fixed tube 1 and the inner telescopic column 2, and one end of the spring 5 is sleeved on the plug-in column 3, and the other end is inserted into the plug-in groove 4. A semi-circular mounting groove 6 is provided at the end of the inner telescopic column 2 away from the spring 5, and the mounting groove 6 is used to install the knob of the electrical appliance.

[0035] A triangular plate-shaped limiting block 7 is integrally formed on the arc-shaped outer wall of the inner telescopic column 2, and the limiting block 7 is located on the side of the inner telescopic column 2 away from the mounting groove 6, and an elastic buckle 8 that is engaged with the limiting block 7 is integrally formed on the side of the outer fixed tube 1 close to its opening. The engagement of the elastic buckle 8 and the limiting block 7, on the one hand, prevents the inner telescopic column 2 from sliding out of the outer fixed tube 1, and plays a role in limiting the inner telescopic column 2, and on the other hand, the elastic buckle 8 and the limiting block 7 can be used to realize the disassembly and installation between the outer fixed tube 1 and the inner telescopic column 2. A square notch 9 is provided on the side of the outer fixed tube 1 close to its opening, and the elastic buckle 8 is located in the notch 9. The notch 9 facilitates the separation of the inner telescopic column 2 and the outer fixed tube 1, and facilitates the inspection and disassembly of the telescopic column.

[0036] Two rectangular guide grooves 10 are symmetrically provided on the inner side wall of the outer fixed tube 1 about the axis direction thereof, and a guide block 11 slidingly matched with the guide groove 10 is integrally formed on the outer side wall of the inner telescopic column 2. When the inner telescopic column 2 slides in the outer fixed tube 1, the guide block 11 follows the inner telescopic column 2 to slide in the guide groove 10. The sliding match between the guide block 11 and the guide groove 10, on the one hand, guides the movement of the inner telescopic column 2, and on the other hand, prevents the inner telescopic column 2 from rotating relatively in the outer fixed tube 1, and ensures that the clamping block 21 slides stably in the sliding groove 20.

[0037] A long strip-shaped reinforcing rib 12 is integrally formed on the outer side wall of the inner telescopic column 2, and the length direction of the reinforcing rib 12 is parallel to the axial direction of the inner telescopic column 2. A long strip-shaped limiting strip 13 is integrally formed on the end of the reinforcing rib 12 away from the inner telescopic column 2, and the length direction of the limiting strip 13 is parallel to the length of the reinforcing rib 12 in the opposite direction. A limiting groove 14 that slidably cooperates with the limiting strip 13 is provided on the inner side wall of the outer fixed tube 1. When the inner telescopic column 2 slides in the outer fixed tube 1, the limiting strip 13 follows the inner telescopic column 2 and slides synchronously in the limiting groove 14. The sliding fit between the limit strip 13 and the limit groove 14 limits the sliding of the inner telescopic column 2, preventing the inner telescopic column 2 from rotating on the inner side wall of the outer fixed tube 1, making the sliding of the inner telescopic column 2 more stable; at the same time, the reinforcing rib 12 increases the fit strength between the inner telescopic column 2 and the outer fixed tube 1, making the inner telescopic column 2 more stable and firm when driving the outer fixed tube 1 to rotate, thereby improving the overall strength of the telescopic rod and increasing the service life of the telescopic rod.

[0038] Combination Figure 2 and Figure 3 As shown, an elliptical swing hook 15 is rotatably mounted on the side wall near the closed end of the outer fixed tube 1. The swing hook 15 realizes rotation on the outer fixed tube 1 through a rotation hole 16 and a rotating shaft 17. The rotation hole 16 is circular and is provided on the side wall of the outer fixed tube 1 near the closed end. The swing hook 15 is integrally formed with a rotating shaft 17 on the side wall near the rotating hole 16 to rotate with the rotating hole 16. A rectangular mounting hole 18 is provided through the closed end of the outer fixed tube 1. The mounting hole 18 facilitates the installation and removal of the swing hook 15. A square inclined groove 19 is provided on the hole wall of the mounting hole 18 near one end of the rotating hole 16. The lower end of the inclined groove 19 is arranged toward the outer fixed tube 1 away from the opening direction thereof. The inclined groove 19 facilitates the alignment between the rotating shaft 17 and the rotating hole 16, making the installation of the swing hook 15 more convenient.

[0039] A sliding groove 20 is provided on one side of the inner telescopic column 2 near the swing hook 15, and one end of the sliding groove 20 near the mounting hole 18 is connected to the mounting hole 18. A clamping block 21 sliding in the sliding groove 20 is integrally formed at one end of the swing hook 15 near the inner telescopic column 2, and the clamping block 21 is triangular in shape as a whole. The sliding groove 20 includes a downward pressing groove 201 and a rebound groove 202, and the two are interconnected. The inner telescopic column 2 is integrally formed with a tightening block 22, and the tightening block 22 is located between the downward pressing groove 201 and the rebound groove 202. A triangular clamping groove 23 is provided at one end of the clamping block 22 away from the mounting hole 18, and the clamping groove 23 is adapted to be clamped with the clamping block 21.

[0040] Those skilled in the art should understand that: in actual use, the outer fixing tube 1 is installed in the electrical appliance, and a knob is installed in the mounting groove 6. The electrical appliance is adjusted by turning the knob. In order to explain the telescopic rod structure in detail in this invention, the knob and the electrical appliance are not shown in the drawings of the specification. In the natural state of the telescopic rod, the spring 5 is in a contracted state. At this time, the clamping block 21 and the clamping groove 23 are mutually engaged, the inner telescopic column 2 is contracted in the outer fixing tube 1, and the knob installed on the mounting groove 6 is located in the surface of the electrical appliance, so that the surface of the electrical appliance is in a smooth and flat state.

[0041] When the electrical appliance needs to be adjusted by turning the knob, the spring 5 is compressed by pressing the knob, so that the inner telescopic column 2 first moves a distance toward the closed end of the outer fixed tube 1, so that the clamping block 21 withdraws from the clamping groove 23, and then the knob is released. The spring 5 uses its own elasticity to drive the inner telescopic column 2 to move toward the opening direction of the outer fixed tube 1. At the same time, the clamping block 21 on the swing hook 15 slides out of the rebound groove 202 until the limit clamping block 7 is clamped with the elastic buckle 8, and the movement of the inner telescopic column 2 stops. The electrical appliance is adjusted by turning the knob. After the electrical appliance is adjusted, the knob is pressed again, the spring 5 is compressed, and the inner telescopic column 2 moves toward the closed end of the outer fixed tube 1. At the same time, the clamping block 21 on the swing hook 15 enters the lower pressing groove 201, and the knob is released. The clamping block 21 moves toward the abutting block 22 due to the elastic action of the spring 5 and is clamped with the clamping groove 23. At this time, the telescopic rod returns to its natural state.

[0042] A plurality of rectangular limiting plates 24 are integrally formed on one side of the outer fixed tube 1 near the swing hook 15. Preferably, two rectangular limiting plates 24 are selected and symmetrically arranged about the axis of the outer fixed tube 1. The swing hook 15 is located between the limiting plates 24 and the side wall of the outer fixed tube 1 to prevent the clamping block 21 from sliding out of the sliding groove 20, so that the swing hook 15 and the inner telescopic column 2 can slide more smoothly. A triangular support portion 25 is integrally formed on one end of the swing hook 15 near the clamping block 21. The support portion 25 plays an auxiliary supporting role for the clamping block 21, preventing the swing hook 15 from detaching from the outer fixed tube 1, so that the installation of the swing hook 15 is more stable.

[0043] The implementation principle of this embodiment is as follows: when the telescopic rod is in a natural state, the spring 5 is in a contracted state, at which time the clamping block 21 and the clamping groove 23 are mutually clamped, the inner telescopic column 2 is contracted in the outer fixed tube 1, and the knob installed on the mounting groove 6 is located in the surface of the electrical appliance, so that the surface of the electrical appliance is in a smooth and flat state. When the electrical appliance needs to be adjusted by turning the knob, by pressing the knob, the spring 5 is compressed, so that the inner telescopic column 2 first moves one end distance toward the closed end of the outer fixed tube 1, so that the clamping block 21 withdraws from the clamping groove 23, and then the knob is released, and the spring 5 uses its own elasticity to drive the inner telescopic column 2 to move toward the opening direction of the outer fixed tube 1. When the inner telescopic column 2 slides in the outer fixed tube 1, the guide block 11 follows the inner telescopic column 2 to slide in the guide groove 10, and the limit bar 13 follows the inner telescopic column 2 to slide synchronously in the limit groove 14. At the same time, the clamping block 21 on the swing hook 15 slides out of the rebound groove 202 until the limit clamping block 7 is clamped with the elastic buckle 8, and the movement of the inner telescopic column 2 stops. The electrical appliance can be adjusted by turning the knob. After the electrical appliance is adjusted, the knob is pressed again, the spring 5 is compressed, and the inner telescopic column 2 moves toward the closed end of the outer fixed tube 1. At the same time, the clamping block 21 on the swing hook 15 enters the lower pressing groove 201. The knob is released, and the clamping block 21 moves toward the pressing block 22 due to the elastic action of the spring 5 and is clamped with the clamping groove 23. At this time, the telescopic rod returns to its natural state.

[0044] The cooperation among the clamping block 21, the clamping groove 23 and the sliding groove 20, and the use of the spring 5, enable the telescopic rod to have the functions of contraction and reset, and can make the knob on the electrical appliance retract into the surface of the electrical appliance, making the surface of the electrical appliance look smoother and more beautiful, and the sliding cooperation between the outer fixed tube 1 and the inner telescopic column 2 can also meet the function of the knob to adjust the machine; at the same time, the telescopic rod can retract the knob into the electrical appliance and avoid the phenomenon of accidental touch of the electrical appliance during use, thereby improving the user experience when using the electrical appliance, and the telescopic rod is convenient and quick to use and replace. , and the production cost is low; the sliding cooperation between the guide block 11 and the guide groove 10, on the one hand, guides the movement of the inner telescopic column 2, making the inner telescopic column 2 slide more smoothly and firmly, and on the other hand, the cooperation between the two places the inner telescopic column 2 to rotate relatively in the outer fixed tube 1, ensuring that the clamping block 21 slides stably in the sliding groove 20; the sliding cooperation between the limit strip 13 and the limit groove 14 limits the sliding of the inner telescopic column 2, preventing the inner telescopic column 2 from rotating on the inner side wall of the outer fixed tube 1, making the inner telescopic column 2 slide more smoothly.

[0045] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A telescopic rod for installing an electrical appliance knob, characterized in that: The invention comprises an external fixing tube (1) having at least one edge, the external fixing tube (1) being a structure with one end open and the other end closed, an inner telescopic column (2) being slidably mounted in the external fixing tube (1), the closed end of the external fixing tube (1) being in contact with the inner telescopic column (2) via a spring (5), a limit block (7) being arranged on the outer side wall of the inner telescopic column (2), an elastic buckle (8) being arranged near the opening of the external fixing tube (1) and being engaged with the limit block (7), an installation groove (6) for mounting an external knob being arranged at the end of the inner telescopic column (2) away from the spring (5), and the outer side wall of the inner telescopic column (2) being provided with a plurality of springs. A sliding groove (20) is provided on the side wall, the sliding groove (20) comprising a lower pressing groove (201) and a rebound groove (202), the lower pressing groove (201) and the rebound groove (202) being connected to each other, a clamping block (22) is provided on the outer side wall of the inner telescopic column (2), the clamping block (22) is located between the lower pressing groove (201) and the rebound groove (202), a clamping groove (23) is provided at one end of the clamping block (22) close to the mounting groove (6), a swing hook (15) is rotatably mounted on the inner side wall of the outer fixed cylinder (1), and a clamping block (21) is provided on the swing hook (15) and is clamped with the clamping groove (23); A guide groove (10) is provided on the inner wall of the outer fixed cylinder (1), and a guide block (11) slidably matched with the guide groove (10) is provided on the outer wall of the inner telescopic column (2); A mounting hole (18) is formed through one closed end of the outer fixing tube (1) to facilitate the mounting of the swing hook (15); A rotating hole (16) is provided on the side wall of the external fixing cylinder (1), a rotating shaft (17) rotatably matched with the rotating hole (16) is provided at one end of the swing hook (15) away from the clamping block (21), and an inclined groove (19) is extended on the hole wall of the mounting hole (18) to facilitate the rotating shaft (17) to enter the mounting hole (18).

2. The telescopic rod for installing an electrical appliance knob according to claim 1, characterized in that: A plurality of limiting plates (24) for limiting the position of the swing hook (15) are arranged on the inner side wall of the outer fixed cylinder (1).

3. The telescopic rod for installing an electrical appliance knob according to claim 1, characterized in that: A supporting portion (25) having a supporting function is provided at one end of the swing hook (15) close to the clamping block (21).

4. The telescopic rod for mounting an electrical appliance knob according to claim 1, characterized in that: A reinforcing rib (12) is provided on the outer side wall of the inner telescopic column (2), a limiting strip (13) is provided at one end of the reinforcing rib (12) away from the inner telescopic column (2), and a limiting groove (14) slidably matched with the limiting strip (13) is provided on the inner side wall of the outer fixed cylinder (1).

5. The telescopic rod for mounting an electrical appliance knob according to claim 1, characterized in that: An inserting column (3) is provided at one end of the outer fixed cylinder (1) close to the closed part thereof, an inserting slot (4) is provided at one end of the inner telescopic column (2) close to the inserting column (3), one end of the spring (5) is sleeved on the inserting column (3), and the other end is located in the inserting slot (4).

6. The telescopic rod for mounting an electrical appliance knob according to claim 1, characterized in that: A notch (9) is provided at one end of the outer fixing tube (1) close to its opening to facilitate opening the elastic buckle (8).

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