Rod-shaped telescopic device

Abstract

The invention discloses a rod-shaped telescopic device, and belongs to the field of telescopic devices. The device comprises a support assembly, a screw assembly, a pull rope, a motor assembly, a battery, a spring, a PCBA and a base assembly. A threaded rod assembly and a pull rope are arranged in the support assembly, the support assembly is fixed to the base assembly, the pull rope is wound in the threaded groove and connected with the support assembly, and other components are installed in the base assembly. The battery supplies power to the motor assembly and the PCBA, the PCBA controls the motor assembly, and the motor assembly can move up and down in the base assembly. Through clockwise or anticlockwise rotation of the base locking piece, switching of stretching and retracting of the sliding rod component in the support assembly can be manually and electrically controlled. The support assembly is formed by connecting a plurality of sliding rod parts in a pairwise sliding mode, and the sliding rod parts are reasonable in structural design and are tightly matched with one another. The device is flexible in operation mode, stable in structure and convenient to maintain, effectively solves the problems of a traditional rod-mounted telescopic device, and has high practical value.

Description

Technical Field

[0001] The invention belongs to the field of telescopic devices, and in particular relates to a rod-shaped telescopic device. Background Art

[0002] In the field of telescopic devices, the traditional method of making multi-stage telescopic devices with ropes is complex in structure. The more stages there are, the more ropes there are, which makes production difficult, resulting in poor stability and difficulty in widespread application in real life. In addition, during the telescopic process, it is easy to shake or get stuck, affecting the user experience and even causing damage to the equipment on board.

[0003] Existing pole-mounted telescopic devices have many limitations in actual use. Some traditional telescopic devices can only be telescoped manually; traditional electric telescopic methods have few levels and a small stroke, which cannot meet the needs of different scenarios. When operated manually, the efficiency is low in scenarios where the length needs to be adjusted quickly; electric operation cannot meet the needs of use when encountering sudden power problems or when extremely high operating precision is required. This new pole-mounted telescopic device is developed to solve these problems. Summary of the invention

[0004] The purpose of the present invention is to provide a rod-shaped telescopic device, aiming to solve the problems existing in the above-mentioned background technology. To achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0005] A rod-shaped telescopic device comprises a bracket assembly, a screw assembly, a pull rope, a motor assembly, a battery, a spring, a PCBA and a base assembly. The bracket assembly is provided with a screw assembly inside, the pull rope is wound around the threaded groove of the screw in the screw assembly, the pull rope comprises an upper pull rope and a lower pull rope, one end of the upper pull rope and one end of the lower pull rope are respectively installed at the bottom and the top of the screw assembly, the bracket assembly is fixed to the base assembly, the motor assembly, the battery, the spring and the PCBA are installed inside the base assembly, the motor assembly is connected to the bottom of the screw assembly, the spring is arranged at the bottom of the motor assembly, the PCBA and the battery are arranged on one side of the motor assembly, the battery electrically connects the motor assembly and the PCBA, the battery is used to supply power to the motor assembly and the PCBA, the PCBA is used to control the motor assembly, the motor assembly moves up and down on the base assembly, when the base lock rotates clockwise, the bosses on both sides of the base lock cause the motor assembly to separate from the screw assembly, at this time the sliding rod component inside the bracket assembly can be manually controlled to be telescopic, when the base lock rotates counterclockwise, the spring causes the motor assembly to be connected to the screw assembly, at this time the motor assembly can control the sliding rod component inside the bracket assembly to be telescopic.

[0006] Preferably, the bracket assembly includes a first sliding bar component, a second sliding bar component, a third sliding bar component and a fourth sliding bar component. The first sliding bar component, the second sliding bar component, the third sliding bar component and the fourth sliding bar component are slidably connected in pairs, and one or more third sliding bar components are arranged between the second sliding bar component and the fourth sliding bar component. The first sliding bar component includes a first upper fixing piece, a first upper sliding hole, a first lower fixing piece, a first lower sliding hole, a first steel shaft, a first aluminum tube and a screw fixing hole. The first upper fixing piece and the first lower fixing piece are connected by two first steel shafts. The first aluminum tube is arranged above the first lower fixing piece and wraps the first upper fixing piece and the first steel shaft. The first upper fixing piece is provided with a first upper sliding hole and a screw fixing hole, and the first lower fixing piece is provided with a first lower sliding hole.

[0007] Preferably, the second sliding rod component includes a second upper fixing piece, a second upper sliding hole, a second lower fixing piece, a second lower sliding hole, a second steel shaft and a second aluminum tube, the second upper fixing piece is provided with a second upper sliding hole, the second lower fixing piece is provided with a second lower sliding hole, four steel shafts are provided between the second upper fixing piece and the second lower fixing piece, the second steel shaft is connected to the first upper sliding hole, the first steel shaft is connected to the second lower sliding hole, the second aluminum tube is provided above the second lower fixing piece and wraps the second upper fixing piece and the second steel shaft, the second lower fixing piece is provided with an internal threaded hole inside, and the internal threaded hole is used for threaded connection with the screw assembly.

[0008] Preferably, the third sliding rod component includes a third upper fixing piece, a third upper sliding hole, a third lower fixing piece, a third lower sliding hole, a third steel shaft and a third aluminum tube. The third upper fixing piece is provided with a third upper sliding hole, the third lower fixing piece is provided with a third lower sliding hole, four steel shafts are provided between the third upper fixing piece and the third lower fixing piece, the third steel shaft is connected to the second upper sliding hole, the second steel shaft is connected to the third lower sliding hole, and the third aluminum tube is provided above the third lower fixing piece and wraps the third upper fixing piece and the third steel shaft.

[0009] Preferably, the fourth sliding rod component includes a fourth upper fixing part, a fourth upper sliding hole, a fourth lower fixing part, a fourth lower sliding hole, a fourth steel shaft, a fourth aluminum tube and an upper fixing part cover, the fourth upper fixing part is provided with a fourth upper sliding hole, the fourth lower fixing part is provided with a fourth lower sliding hole, two steel shafts are provided between the fourth upper fixing part and the fourth lower fixing part, the fourth steel shaft is connected to the third upper sliding hole, the third steel shaft is connected to the fourth lower sliding hole, the fourth aluminum tube is provided above the fourth lower fixing part and wraps the fourth upper fixing part and the fourth steel shaft, and the upper fixing part cover is installed on the top of the fourth upper fixing part.

[0010] Preferably, the screw assembly includes a first screw, a second screw, a screw, a screw protruding shaft, an upper pull rope fixing hole, an upper pull rope, a lower pull rope fixing hole and a lower pull rope, the thread of the screw is threadedly connected to the internal threaded hole, the first screw and the second screw are both installed inside the fourth upper fixing member, the bottom of the screw is connected to the motor assembly, the top of the screw is provided with an integrally formed screw protruding shaft, the screw protruding shaft is fixed to the screw fixing hole, the bottom of the screw is provided with an upper pull rope fixing hole, one end of the upper pull rope is connected to the upper pull rope fixing hole and wrapped around the screw, the other end of the upper pull rope passes through the first axis of the second lower fixing member, the axis of the second upper fixing member, the axis of the third lower fixing member, the axis of the third upper fixing member and the axis of the fourth lower fixing member in sequence, and is installed inside the fourth upper fixing member through the second screw, the head of the screw is provided with a lower pull rope fixing hole, one end of the lower pull rope is fixed to the lower pull rope fixing hole and wrapped around the screw, and the other end of the lower pull rope passes through the second axis of the second lower fixing member and the axis of the fourth lower fixing member in sequence and is installed inside the fourth upper fixing member through the first screw.

[0011] Preferably, the motor assembly includes a reduction motor, a motor bracket and a protruding shaft, the reduction motor is mounted on the motor bracket, two protruding shafts are arranged on both sides of the motor bracket, and the protruding shafts are assembled on the base assembly.

[0012] Preferably, the base assembly includes a base, a slot, a locking member, a boss and a bottom cover. The base is connected to the first sliding member. Slots are provided on both sides of the base, the slots correspond to the protruding shafts, and the protruding shafts move up and down in the slots. A locking member is provided on the outer side of the base, a boss corresponding to the protruding shaft is provided on the inner side of the locking member, and a bottom cover is provided at the bottom of the base.

[0013] Preferably, the first lower fixing member, the second lower fixing member, the third lower fixing member and the fourth lower fixing member are further provided with a first buckle position, the first buckle position is used to fix the corresponding aluminum tube, and the fourth upper fixing member is further provided with a second buckle position.

[0014] Beneficial effects of the present invention:

[0015] Compact, stable and reliable structure: The screw and the pull rope are cleverly combined. While the screw drives a group of slide rods to rise and fall, it also drives other slide rods to rise and fall at the same time through the pull rope. The slide rod assembly can be multi-level as needed, and only two pull ropes are needed, which reduces the manufacturing difficulty. The two pull ropes are fixed and wrapped in the threads at both ends of the screw. One pull rope contracts and the other is released. The contraction and release lengths are equal, so as to ensure that the bracket can be positioned when it is extended to any length. The interior of the bracket assembly is composed of multiple slide rod components that are slidably connected in pairs. This design enables the device to maintain good stability during the extension and retraction process, reducing shaking and jamming. At the same time, the slide rod components are connected by steel shafts and fixed with aluminum tubes, which enhances the strength of the overall structure, ensures that the device is not easily deformed and damaged when subjected to a certain external force, and extends its service life.

[0016] Reasonable design of parts and components for easy maintenance: The end of the pull rope is connected to the slide rod by screws, and the tightness of the pull rope can be adjusted by screws, which is convenient for later debugging and maintenance. In addition, the motor assembly, battery and other components are installed inside the base assembly, with a reasonable layout, which is convenient for daily maintenance and overhaul, and reduces maintenance costs.

[0017] Flexible switching of operation modes: The device has two operation modes, manual and electric, which can be easily switched by the rotation direction of the base lock. When the base lock rotates clockwise, the bosses on both sides of the base lock cause the motor assembly to separate from the screw assembly, and the extension and retraction of the slide bar component inside the bracket assembly can be manually controlled, which is suitable for scenes that require fine adjustment or power is inconvenient; when rotating counterclockwise, the spring causes the motor assembly to connect with the screw assembly, and the motor assembly controls the extension and retraction of the slide bar component, which has obvious advantages in situations where efficiency is sought, greatly improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a bracket assembly provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of a bracket assembly provided in an embodiment of the present invention;

[0021] Figure 4 is a cross-sectional view of the overall structure of an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of a partial structure enlargement of an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of a partial structure enlargement of an embodiment of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of partial components of an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of a motor assembly and a boss structure according to an embodiment of the present invention;

[0026] Fig. 9 It is a schematic diagram of the separation structure of the boss and the protruding shaft according to an embodiment of the present invention;

[0027] Fig.10 It is a schematic diagram of the boss extrusion protruding shaft structure of an embodiment of the present invention.

[0028] Among them, the reference numerals in the figure are:

[0029] 1. Bracket assembly; 11. First slide bar component; 111. First upper fixing member; 112. First upper sliding hole; 113. First lower fixing member; 114. First lower sliding hole; 115. First steel shaft; 116. First aluminum tube; 117. Screw fixing hole; 12. Second slide bar component; 121. Second upper fixing member; 122. Second upper sliding hole; 123. Second lower fixing member; 124. Second lower sliding hole; 125. Second steel shaft; 126. Second aluminum tube; 127. Internal threaded hole; 13. Third slide bar component; 131. Third upper fixing member; 132. Third upper sliding hole; 133. Third lower fixing member; 134. Third lower sliding hole; 135. Third steel shaft; 136. Third aluminum tube Tube; 14, fourth sliding rod component; 141, fourth upper fixing piece; 142, fourth upper sliding hole; 143, fourth lower fixing piece; 144, fourth lower sliding hole; 145, fourth steel shaft; 146, fourth aluminum tube; 147, upper fixing piece cover; 2, screw assembly; 21, first screw; 22, second screw; 23, screw; 24, screw protruding shaft; 25, upper pull rope fixing hole; 26, lower pull rope fixing hole; 3, motor assembly; 31, reduction motor; 32, motor bracket; 33, protruding shaft; 4, battery; 5, spring; 6, PCBA; 7, base assembly; 71, base; 72, slot; 73, lock; 74, boss; 75, bottom cover; 8, first buckle position; 9, second buckle position. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. The terms "upper end", "lower end", "left side", "right side", "front end", "rear end" and similar expressions used herein are positional relationships with reference to the accompanying drawings.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0034] like Figures 1 to 10 As shown, an embodiment of the present invention provides a rod-shaped telescopic device, including a bracket assembly 1, a screw assembly 2, a motor assembly 3, a battery 4, a spring 5, a PCBA 6, a base assembly 7 and a pull rope 10. The bracket assembly 1 is provided with a screw assembly 2 inside, and the pull rope 10 is wound around the thread groove of the screw in the screw assembly 2. The pull rope 10 includes an upper pull rope 101 and a lower pull rope 102. One end of the upper pull rope 101 and one end of the lower pull rope 102 are respectively installed at the bottom and the top of the screw assembly 2. The bracket assembly 1 is fixed to the base assembly 7. The motor assembly 3, the battery 4, the spring 5 and the PCBA 6 are installed inside the base assembly 7. The bottom of the screw assembly 2 is connected to the motor assembly 3. The motor assembly 3 is reached, a spring 5 is arranged at the bottom of the motor assembly 3, a PCBA6 and a battery 4 are arranged on one side of the motor assembly 3, the battery 4 is electrically connected to the motor assembly 3 and the PCBA6, the battery 4 is used to supply power to the motor assembly 3 and the PCBA6, the PCBA6 is used to control the motor assembly 3, the motor assembly 3 moves up and down on the base assembly 7, when the base 71 bracket rotates clockwise, the motor assembly 3 is separated from the screw assembly 2, at this time the sliding rod component inside the bracket assembly 1 is manually controlled to be extended and retracted, when the base 71 bracket rotates counterclockwise, the motor assembly 3 is connected to the screw assembly 2, at this time the motor assembly 3 controls the sliding rod component inside the bracket assembly 1 to be extended and retracted.

[0035] In the embodiment, the bracket assembly 1 includes a first sliding bar component 11, a second sliding bar component 12, a third sliding bar component 13 and a fourth sliding bar component 14. The first sliding bar component 11, the second sliding bar component 12, the third sliding bar component 13 and the fourth sliding bar component 14 are slidably connected in pairs, and one or more third sliding bar components 13 are arranged between the second sliding bar component 12 and the fourth sliding bar component 14. The first sliding bar component 11 includes a first upper fixing member 111, a first upper sliding hole 112, and a first lower fixing member 113. , a first lower sliding hole 114, a first steel shaft 115, a first aluminum tube 116 and a screw fixing hole 117, the first upper fixing piece 111 and the first lower fixing piece 113 are connected by two first steel shafts 115, the first aluminum tube 116 is arranged above the first lower fixing piece 113 and wraps the first upper fixing piece 111 and the first steel shaft 115, the first upper fixing piece 111 is provided with a first upper sliding hole 112 and a screw fixing hole 117, and the first lower fixing piece 113 is provided with a first lower sliding hole 114.

[0036] In the embodiment, the second sliding rod component 12 includes a second upper fixing piece 121, a second upper sliding hole 122, a second lower fixing piece 123, a second lower sliding hole 124, a second steel shaft 125 and a second aluminum tube 126. The second upper fixing piece 121 is provided with a second upper sliding hole 122, the second lower fixing piece 123 is provided with a second lower sliding hole 124, four steel shafts are provided between the second upper fixing piece 121 and the second lower fixing piece 123, the second steel shaft 125 is connected to the first upper sliding hole 112, the first steel shaft 115 is connected to the second lower sliding hole 124, the second aluminum tube 126 is provided above the second lower fixing piece 123 and wraps the second upper fixing piece 121 and the second steel shaft 125, and the interior of the second lower fixing piece 123 is provided with an internal threaded hole 127, and the internal threaded hole 127 is used for threaded connection with the screw assembly 2.

[0037] In the embodiment, the third sliding rod component 13 includes a third upper fixing piece 131, a third upper sliding hole 132, a third lower fixing piece 133, a third lower sliding hole 134, a third steel shaft 135 and a third aluminum tube 136. The third upper fixing piece 131 is provided with a third upper sliding hole 132, the third lower fixing piece 133 is provided with a third lower sliding hole 134, four steel shafts are provided between the third upper fixing piece 131 and the third lower fixing piece 133, the third steel shaft 135 is connected to the second upper sliding hole 122, the second steel shaft 125 is connected to the third lower sliding hole 134, and the third aluminum tube 136 is provided above the third lower fixing piece 133 and wraps the third upper fixing piece 131 and the third steel shaft 135.

[0038] In the embodiment, the fourth sliding rod component 14 includes a fourth upper fixing piece 141, a fourth upper sliding hole 142, a fourth lower fixing piece 143, a fourth lower sliding hole 144, a fourth steel shaft 145, a fourth aluminum tube 146 and an upper fixing piece cover 147. The fourth upper fixing piece 141 is provided with a fourth upper sliding hole 142, the fourth lower fixing piece 143 is provided with a fourth lower sliding hole 144, two steel shafts are provided between the fourth upper fixing piece 141 and the fourth lower fixing piece 143, the fourth steel shaft 145 is connected to the third upper sliding hole 132, the third steel shaft 135 is connected to the fourth lower sliding hole 144, the fourth aluminum tube 146 is provided above the fourth lower fixing piece 143 and wraps the fourth upper fixing piece 141 and the fourth steel shaft 145, and the upper fixing piece cover 147 is installed on the top of the fourth upper fixing piece.

[0039] In the embodiment, the screw assembly 2 includes a first screw 21, a second screw 22, a screw 23, a screw protruding shaft 24, an upper pull rope fixing hole 25 and a lower pull rope fixing hole 26. The thread of the screw 23 is threadedly connected to the internal threaded hole 127. The first screw 21 and the second screw 22 are both installed inside the fourth upper fixing member 141. The bottom of the screw is connected to the motor assembly 3. An integrally formed screw protruding shaft 24 is provided at the top of the screw 23. The screw protruding shaft 24 is fixed to the screw fixing hole 117. An upper pull rope fixing hole 25 is provided at the bottom of the screw 23. One end of the upper pull rope 101 is connected to the upper pull rope fixing hole 25 and is wrapped around the screw 23. The other end of the pull rope 101 passes through the first axis of the second lower fixing piece 123, the axis of the second upper fixing piece 121, the axis of the third lower fixing piece 133, the axis of the third upper fixing piece 131 and the axis of the fourth lower fixing piece 143 in sequence, and is then installed inside the fourth upper fixing piece 141 through the second screw 22. A pull rope fixing hole 26 is provided at the head of the screw rod 23. One end of the pull rope 102 is fixed to the pull rope fixing hole 26 and wrapped around the screw rod 23. The other end of the pull rope 102 passes through the second axis of the second lower fixing piece 123 and the axis of the fourth lower fixing piece 143 in sequence, and is then installed inside the fourth upper fixing piece 141 through the first screw 21.

[0040] In the embodiment, the motor assembly 3 includes a reduction motor 31 , a motor bracket 32 ​​and a protruding shaft 33 . The reduction motor 31 is mounted on the motor bracket 32 ​​. Two protruding shafts 33 are provided on both sides of the motor bracket 32 ​​. The protruding shafts 33 are assembled on the base assembly 7 .

[0041] In the embodiment, the base assembly 7 includes a base 71, a slot 72, a lock 73, a boss 74 and a bottom cover 75. The base 71 is connected to the first sliding component. The base 71 is provided with slots 72 on both sides. The slots 72 correspond to the protruding shaft 33. The protruding shaft 33 moves up and down in the slot 72. The outer side of the base 71 is provided with a lock 73. The inner side of the lock 73 is provided with a boss 74 corresponding to the protruding shaft 33. The bottom of the base 71 is provided with a bottom cover 75.

[0042] In the embodiment, the first lower fixing member 113 , the second lower fixing member 123 , the third lower fixing member 133 and the fourth lower fixing member 143 are further provided with a first buckle position 8 for fixing the corresponding aluminum tube, and the fourth upper fixing member 143 is further provided with a second buckle position 9 .

[0043] like Figure 4 As shown, the first slide bar component 11 is fixed, and when the reduction motor 31 drives the screw rod 23 to rotate clockwise, the screw rod 23 drives the second slide bar component 12 to move upward through the internal threaded hole 127 of the second lower fixing member 13 in the second slide bar component 12. At the same time, the upper pull rope 101 is wound and contracted due to the rotation of the screw rod 23, and the upper pull rope 101 pulls the third slide bar component 13 and the fourth slide bar component 14 to rise, and at the same time, the lower pull rope 102 is released by the screw rod 23, and the released length of the lower pull rope 102 is equal to the contracted length of the upper pull rope 101, thereby ensuring that the bracket assembly 1 can be positioned at any length after being extended.

[0044] Similarly, when the reduction motor 31 drives the screw rod 23 to rotate counterclockwise, the lower pull rope 102 is wound and contracted, the upper pull rope 101 is released, and the second slide bar component 12, the third slide bar component 13 and the fourth slide bar component 14 are contracted.

[0045] like Figure 9-10 As shown, when the lock 73 is rotated clockwise, the boss 74 squeezes the protruding shaft 33, so that the motor assembly 3 moves downward as a whole, and the output shaft of the reduction motor 31 is separated from the screw 23. At this time, the aluminum tube and the bracket assembly 1 can be manually pulled to extend and retract;

[0046] When the lock 73 is rotated counterclockwise, the boss 74 is separated from the protruding shaft 33, and the spring causes the motor assembly 3 to move upward as a whole. The output shaft of the reduction motor 31 is inserted into the hole of the screw rod 23, and the reduction motor 31 can be used to control the extension and retraction of the aluminum tube and the bracket assembly 1.

[0047] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A rod-shaped telescopic device, characterized in that: The invention comprises a bracket assembly, a screw assembly, a pull rope, a motor assembly, a battery, a spring, a PCBA and a base assembly, wherein the screw assembly is arranged inside the bracket assembly, the pull rope is wound around the thread groove of the screw in the screw assembly, the pull rope comprises an upper pull rope and a lower pull rope, one end of the upper pull rope and one end of the lower pull rope are respectively mounted on the bottom and the top of the screw assembly, the bracket assembly is fixed to the base assembly, the motor assembly, the battery, the spring and the PCBA are installed inside the base assembly, the bottom of the screw assembly is connected to the motor assembly, the bottom of the motor assembly is provided with the spring, and one side of the motor assembly is provided with the PCBA and The battery is electrically connected to the motor assembly and the PCBA, the battery is used to power the motor assembly and the PCBA, the PCBA is used to control the motor assembly, the motor assembly moves up and down in the base assembly, bosses are provided on both sides of the base lock, when the base lock rotates clockwise, the bosses on both sides of the base lock cause the motor assembly to separate from the screw assembly, at this time the sliding rod component inside the bracket assembly can be manually controlled to extend and retract, when the base lock rotates counterclockwise, the spring causes the motor assembly to be connected to the screw assembly, at this time the motor assembly can control the sliding rod component inside the bracket assembly to extend and retract.

2. A rod-shaped telescopic device according to claim 1, characterized in that: The bracket assembly includes a first sliding bar component, a second sliding bar component, a third sliding bar component and a fourth sliding bar component, the first sliding bar component, the second sliding bar component, the third sliding bar component and the fourth sliding bar component are slidably connected in pairs, one or more third sliding bar components are arranged between the second sliding bar component and the fourth sliding bar component, the first sliding bar component includes a first upper fixing piece, a first upper sliding hole, a first lower fixing piece, a first lower sliding hole, a first steel shaft, a first aluminum tube and a screw fixing hole, the first upper fixing piece and the first lower fixing piece are connected by two first steel shafts, the first aluminum tube is arranged above the first lower fixing piece and wraps the first upper fixing piece and the first steel shaft, the first upper fixing piece is provided with the first upper sliding hole and the screw fixing hole, and the first lower fixing piece is provided with the first lower sliding hole.

3. A rod-shaped telescopic device according to claim 2, characterized in that: The second sliding rod component includes a second upper fixing piece, a second upper sliding hole, a second lower fixing piece, a second lower sliding hole, a second steel shaft and a second aluminum tube, the second upper fixing piece is provided with the second upper sliding hole, the second lower fixing piece is provided with the second lower sliding hole, four steel shafts are provided between the second upper fixing piece and the second lower fixing piece, the second steel shaft is connected to the first upper sliding hole, the second steel shaft is connected to the second lower sliding hole, the second aluminum tube is provided above the second lower fixing piece and wraps the second upper fixing piece and the second steel shaft, the second lower fixing piece is provided with an internal threaded hole inside, and the internal threaded hole is used for threaded connection with the screw assembly.

4. A rod-shaped telescopic device according to claim 3, characterized in that: The third sliding rod component includes a third upper fixing piece, a third upper sliding hole, a third lower fixing piece, a third lower sliding hole, a third steel shaft and a third aluminum tube. The third upper fixing piece is provided with the third upper sliding hole, the third lower fixing piece is provided with the third lower sliding hole, four steel shafts are provided between the third upper fixing piece and the third lower fixing piece, the third steel shaft is connected to the second upper sliding hole, the second steel shaft is connected to the third lower sliding hole, and the third aluminum tube is provided above the third lower fixing piece and wraps the third upper fixing piece and the third steel shaft.

5. A rod-shaped telescopic device according to claim 4, characterized in that: The fourth sliding rod component includes a fourth upper fixing piece, a fourth upper sliding hole, a fourth lower fixing piece, a fourth lower sliding hole, a fourth steel shaft, a fourth aluminum tube and an upper fixing piece cover, the fourth upper fixing piece is provided with the fourth upper sliding hole, the fourth lower fixing piece is provided with the fourth lower sliding hole, two steel shafts are provided between the fourth upper fixing piece and the fourth lower fixing piece, the fourth steel shaft is connected to the third upper sliding hole, the third steel shaft is connected to the fourth lower sliding hole, the fourth aluminum tube is provided above the fourth lower fixing piece and wraps the fourth upper fixing piece and the fourth steel shaft, and the upper fixing piece cover is installed on the top of the fourth upper fixing piece.

6. A rod-shaped telescopic device according to claim 5, characterized in that: The screw assembly includes a first screw, a second screw, a screw, a screw protruding shaft, an upper pull rope fixing hole and a lower pull rope fixing hole. The thread of the screw is threadedly connected to the internal threaded hole. The first screw and the second screw are both installed inside the fourth upper fixing member. The bottom of the screw is connected to the motor assembly. The top of the screw is provided with an integrally formed screw protruding shaft, and the screw protruding shaft is fixed to the screw fixing hole. The bottom of the screw is provided with the upper pull rope fixing hole, and one end of the upper pull rope is connected to the upper pull rope fixing hole and wrapped around the screw The other end of the upper pull rope passes through the first axis of the second lower fixing piece, the axis of the second upper fixing piece, the axis of the third lower fixing piece, the axis of the third upper fixing piece and the axis of the fourth lower fixing piece in sequence, and is then installed inside the fourth upper fixing piece through the second screw. The head of the screw rod is provided with the lower pull rope fixing hole, one end of the lower pull rope is fixed to the lower pull rope fixing hole and wrapped around the screw rod, and the other end of the lower pull rope passes through the second axis of the second lower fixing piece and the axis of the fourth lower fixing piece in sequence, and is then installed inside the fourth upper fixing piece through the first screw.

7. A rod-shaped telescopic device according to claim 5 or 6, characterized in that: The motor assembly includes a reduction motor, a motor bracket and a protruding shaft. The reduction motor is mounted on the motor bracket. Two protruding shafts are arranged on both sides of the motor bracket. The protruding shafts are assembled on the base assembly.

8. A rod-shaped telescopic device according to claim 7, characterized in that: The base assembly includes a base, a slot, a locking piece, a boss and a bottom cover, the base is connected to the first sliding component, the slots are provided on both sides of the base, the slots correspond to the protruding shaft, the protruding shaft moves up and down in the slots, the locking piece is provided on the outer side of the base, the boss corresponding to the protruding shaft is provided on the inner side of the locking piece, and the bottom of the base is provided with a bottom cover.

9. A rod-shaped telescopic device according to claim 8, characterized in that: The first lower fixing member, the second lower fixing member, the third lower fixing member and the fourth lower fixing member are also provided with a first buckle position, and the first buckle position is used to fix the corresponding aluminum tube, and the fourth upper fixing member is also provided with a second buckle position.

Images