Easy-to-use telescopic rod and its double-control telescopic mechanism

Abstract

The utility model discloses an easy-to-use telescopic rod and a double-control telescopic mechanism thereof, the double-control telescopic mechanism comprises a telescopic body and an adjusting body movably matched with the telescopic body, the telescopic body is matched with an electric drive device, the electric drive device is matched with the adjusting body through a bidirectional clutch device and drives the adjusting body to move relative to the telescopic body. The easy-to-use telescopic rod has an electric control operation mode and can conveniently adjust the length of the telescopic rod.

Description

Technical Field

[0001] This utility model relates to the field of telescopic poles, and in particular to an easy-to-use telescopic pole and its dual-control telescopic mechanism. Background Technology

[0002] Telescopic poles are adjustable in length and, with the fixing brackets at both ends, can be securely installed between fixed surfaces (such as walls) at certain intervals. In daily life, telescopic poles are widely used as clotheslines, curtain rods, shower curtain rods, and projection screen hanging rods, etc.

[0003] When using existing telescopic poles, the length is usually adjusted manually by the user, which requires the user to use both hands. Moreover, the entire manual operation is difficult, and it is difficult for the user to quickly adjust the length of the telescopic pole so that both ends of the telescopic pole can stably abut against the fixed surfaces on both sides.

[0004] In view of the above problems, it is necessary to study an easy-to-use telescopic rod and its dual-control telescopic mechanism, which can easily adjust the length. Utility Model Content

[0005] The purpose of this utility model is to provide an easy-to-use telescopic rod and its dual-control telescopic mechanism, which can conveniently adjust the length.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A dual-control telescopic mechanism includes a telescopic body and an adjusting body that moves in conjunction with the telescopic body. The telescopic body is equipped with an electric drive device, which engages with the adjusting body via a bidirectional clutch and drives the adjusting body to move relative to the telescopic body.

[0008] The electric drive device has an electric shaft that can rotate in both directions. The electric shaft is connected to a two-way clutch device, which is keyed to an adjusting body. The adjusting body is threaded to a telescopic body.

[0009] The bidirectional clutch device includes a guide seat, an output seat, an input seat, and at least two clutch balls. The guide seat is fixedly fitted to the telescopic body and is magnetic. The output seat has an output post connected to the adjusting body and an output cylinder nested with the guide seat, forming a clutch cavity between the output cylinder and the guide seat. The inner wall of the output cylinder has at least two clutch grooves along its circumference. The input seat is connected to the electric shaft of the electric drive device and is rotatably fitted to the guide seat. The input seat has a shifting part located in the guide seat, and the shifting part has at least two clutch shifting blocks. Each clutch ball... Each clutch ball is housed within the clutch cavity and positioned between two adjacent clutch levers. The clutch balls are magnetically attracted to the guide seat, movably engaged with the clutch groove, and in contact with the clutch levers. When the bidirectional clutch device is in the disengaged state, each clutch ball disengages from the clutch groove of the output cylinder and is magnetically engaged with the guide seat. When the bidirectional clutch device is in the engaged state, each clutch ball is pushed into the clutch groove by the clutch levers, allowing each clutch lever to form a circumferential limiting engagement with the output cylinder through the clutch balls.

[0010] The telescopic body has a connecting body with an external thread; the adjusting body has an internal thread that is screwed into the external thread; the electric drive device and the bidirectional clutch device are installed in the connecting body of the telescopic body, and a sealing ring is sandwiched between the output seat of the bidirectional clutch device and the inner wall of the connecting body.

[0011] The electric drive device is provided with a charging interface and at least one control button. The control button is fitted with a button cap. The connecting body of the telescopic body is provided with a button hole that seals with the button cap. The connecting body of the telescopic body is also provided with a charging hole corresponding to the charging interface, and a charging cap is fitted into the charging hole.

[0012] The electric drive device includes a control circuit board, a drive motor, a reduction mechanism, and an electric shaft. The drive motor is connected to the electric shaft through the reduction mechanism. The control circuit board is connected to the drive motor and has at least one control button.

[0013] The electric drive device also includes a power supply battery electrically connected to the control circuit board; the control circuit board is also provided with a charging interface.

[0014] An easy-to-use telescopic pole, comprising the dual-control telescopic mechanism described above.

[0015] The telescopic body includes a telescopic main body and a movable body movably connected to the telescopic main body; the movable body is fitted onto the telescopic main body, and the movable body has a row of adjustment holes along its axial direction; the telescopic main body is equipped with a positioning component that is movably inserted into each adjustment hole of the movable body, and a switch component that controls whether the positioning component is inserted into the adjustment hole.

[0016] The positioning assembly includes a mounting base, a positioning seat, a positioning spring, a positioning rack, and a positioning gear. The mounting base is fixedly mounted on the telescopic body. The positioning seat is slidably connected to the mounting base, and the positioning seat is provided with a positioning pin for insertion into the adjustment hole. The positioning seat is also provided with positioning teeth. The positioning spring is sandwiched between the positioning seat and the mounting base and is used to drive the positioning pin into the adjustment hole. The positioning rack is slidably connected to the mounting base, and the positioning gear is rotatably engaged with the mounting base. The positioning gear meshes with the positioning teeth of the positioning rack and the positioning seat. The switch assembly cooperates with the positioning rack and is used to drive the positioning rack to move.

[0017] The switch assembly includes a switch base, a switch button, a return spring, and a linkage rocker block. The switch base is fixedly mounted on the telescopic body, the switch button slides on the switch base, the return spring is located between the switch button and the switch base and is used to drive the switch button to reset, and the linkage rocker block is rotatably connected to the switch base. The linkage rocker block has a pressing part and a linkage part. The pressing part is for the switch button to press, and the linkage part is connected to the positioning rack through a linkage rope.

[0018] The end of the telescopic body away from the adjusting body and the end of the adjusting body away from the telescopic body are both connected to a fixed base.

[0019] With the above solution, when using the easy-to-use telescopic pole of this utility model, the user can drive the adjusting body to move relative to the telescopic body through the electric drive device and the two-way clutch device, thereby realizing the electric adjustment of the length of the easy-to-use telescopic pole of this utility model, allowing the user to easily adjust the length of the easy-to-use telescopic pole. In addition, through the two-way clutch device, the user can directly manually drive the adjusting body to move relative to the telescopic body, thereby realizing the manual adjustment of the length of the easy-to-use telescopic pole of this utility model, which is convenient for the user when the electric drive device is out of power or damaged. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the easy-to-use telescopic rod of this utility model.

[0021] Figure 2 This is an exploded view of the structure of the easy-to-use telescopic rod of this utility model.

[0022] Figure 3 A cross-sectional view of the easy-to-use telescopic rod of this utility model. Figure 1 .

[0023] Figure 4 for Figure 3 Enlarged view of point A.

[0024] Figure 5 for Figure 3 Enlarged view of point B.

[0025] Figure 6 for Figure 3 Enlarged view of point C.

[0026] Figure 7 A cross-sectional view of the easy-to-use telescopic rod of this utility model. Figure 2 (The two-way clutch is in the disengaged state).

[0027] Figure 8 A cross-sectional view of the easy-to-use telescopic rod of this utility model. Figure 3 (The two-way clutch is engaged.)

[0028] Figure 9 This is an exploded view of the telescopic body of this utility model.

[0029] Figure 10 This is an exploded view of the bidirectional clutch device of this utility model.

[0030] Label Explanation:

[0031] Telescopic body 1,

[0032] Telescopic body 11,

[0033] Movable body 12, Adjustment hole 121,

[0034] Positioning component 13, mounting base 131, positioning seat 132, positioning pin 1321, positioning teeth 1322, positioning spring 133, positioning rack 134, positioning gear 135.

[0035] Switch assembly 14, switch base 141, switch button 142, return spring 143, linkage rocker block 144, pressing part 1441, linkage part 1442.

[0036] Linkage rope 15,

[0037] Connector body 16, button hole 161, charging hole 162, connecting external thread 163

[0038] Adjusting body 2, connected by internal thread 21,

[0039] Electric drive unit 3, electric rotating shaft 31, control circuit board 32, control button 321, button cap 3211, charging interface 322, charging cap 3221, drive motor 33, reduction mechanism 34, power supply battery 35.

[0040] A two-way clutch device 4 includes a clutch chamber 40, a guide seat 41, a rotating hole 411, an output seat 42, an output post 421, an output cylinder 422, a clutch groove 4221, a guide hole 4222, an input seat 43, an actuating part 431, a clutch lever 4311, a connecting part 432, a guide part 433, and a clutch ball 44.

[0041] Fixed base 5,

[0042] Sealing ring a. Detailed Implementation

[0043] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0044] like Figures 1 to 10 As shown, this utility model discloses an easy-to-use telescopic rod with a dual-control telescopic mechanism. The dual-control telescopic mechanism includes a telescopic body 1 and an adjusting body 2 that is movably coordinated with the telescopic body 1. The telescopic body 1 is equipped with an electric drive device 3. The electric drive device 3 cooperates with the adjusting body 2 through a two-way clutch device 4 and drives the adjusting body 2 to move relative to the telescopic body 1.

[0045] In use, the user can manually adjust the length of the telescopic pole by driving the adjusting body 2 relative to the telescopic body 1 via the electric drive device 3. This allows for convenient length adjustment (the operation of the electric drive device 3 is very simple and can be controlled via buttons or a touch screen). Furthermore, the bidirectional clutch device 4 allows the user to directly and manually drive the adjusting body 2 relative to the telescopic body 1, further enabling manual length adjustment when the electric drive device 3 is out of power or damaged.

[0046] In an embodiment of this utility model, the electric drive device 3 may have an electric rotating shaft 31 that can rotate in both directions. The electric rotating shaft 31 is connected to a two-way clutch device 4, which is keyed to the adjusting body 2, and the adjusting body 2 is threaded to the telescopic body 1. The electric rotating shaft 31 of the electric drive device 3 drives the adjusting body 2 to rotate through the two-way clutch device 4, thereby driving the adjusting body 2 to move relative to the telescopic body 1. When the electric drive device 3 is out of power or damaged, the user can directly rotate the adjusting body 2 manually to drive the adjusting body 2 to move relative to the telescopic body 1, thereby realizing the manual adjustment of the length of the easy-to-use telescopic rod of this utility model.

[0047] In an embodiment of this utility model, the bidirectional clutch device 4 includes a guide seat 41, an output seat 42, an input seat 43, and at least two clutch balls 44; the guide seat 41 is fixedly engaged with the telescopic body 1 and is magnetic; the output seat 42 has an output post 421 keyed to the adjusting body 2 and an output cylinder 422 sleeved with the guide seat 41, forming a clutch cavity 40 between the output cylinder 422 and the guide seat 41; the inner wall of the output cylinder 422 is provided with at least two clutch grooves 4221 along the circumferential direction; the input seat 43 is connected to the electric shaft 31 of the electric drive device 3 and the input seat 44... 3. The input seat 43 is rotatably engaged with the guide seat 41. The input seat 43 has a toggle part 431 located in the guide seat 41. The toggle part 431 is provided with at least two clutch levers 4311. Each clutch ball 44 is housed in the clutch cavity 40 and each clutch ball 44 is located between two adjacent clutch levers 4311. The clutch ball 44 is magnetically engaged with the guide seat 41 (at least one of the clutch ball 44 and the guide seat 41 is magnetic, preferably the clutch ball 44 is magnetic). The clutch ball 44 is movably fitted with the clutch groove 4221 and the clutch ball 44 is movably abutting against the clutch lever 4311. When the bidirectional clutch device 4 is in the disengaged state, each clutch ball 44 disengages from the clutch groove 4221 of the output cylinder 422 and the clutch ball 44 is magnetically attracted to the guide seat 41. At this time, the output seat 42 can rotate freely relative to the input seat 43, allowing the user to directly rotate the adjusting body 2 manually. When the bidirectional clutch device 4 is in the engaged state, each clutch ball 44 is pushed by the clutch lever 4311 and embedded into the clutch groove 4221 respectively, so that each clutch lever 4311 forms a circumferential limiting engagement with the output cylinder 422 through the clutch ball 44. At this time, the input seat 43 can drive the output seat 42 to rotate, so that the electric shaft 31 of the electric drive device 3 can drive the adjusting body 2 to rotate through the bidirectional clutch device 4. The guide seat 41 may have a rotating hole 411 at its center, and the input seat 43 has a rotatable connecting part 432 that can be inserted into the rotating hole 411. The connecting part 432 is connected to the electric shaft 31 of the electric drive device 3. The input seat 43 also has a guide part 433, and the output cylinder 422 of the output seat 42 has a guide hole 4222 for fitting the guide part 433, so that the input seat 43 and the output seat 42 rotate smoothly. It should be noted that the bidirectional clutch device 4 used in this utility model is not limited to the aforementioned structure. The bidirectional clutch device 4 can be driven by manual and electric drive devices 3 as long as it allows the adjusting body 2 to move relative to the telescopic body 1. For example, the bidirectional clutch device 4 can also use an existing electromagnetic clutch device.

[0048] In an embodiment of this utility model, the electric drive device 3 may include a control circuit board 32, a drive motor 33, a reduction mechanism 34, and an electric rotating shaft 31. The drive motor 33 is connected to the electric rotating shaft 31 through the reduction mechanism 34, and the control circuit board 32 is connected to the drive motor 33. The reduction mechanism 34 can increase the torque of the rotating shaft to ensure that the adjusting body 2 can be driven to rotate. The reduction mechanism 34 may be a planetary reduction mechanism or other commonly used reduction mechanism. The control circuit board 32 is used to control the operation of the drive motor 33.

[0049] In an embodiment of this utility model, the control circuit board 32 is provided with at least one control button 321, and the control button 321 is equipped with a button cap 3211. The user controls the operation of the drive motor 33 by pressing the control button 321, which is simple to operate. Specifically, the control circuit board 32 may be provided with two control buttons 321, one control button 321 is used to control the drive motor 33 to rotate forward, and the other control button 321 is used to control the drive motor 33 to rotate in reverse.

[0050] In an embodiment of this utility model, the electric drive device 3 may further include a power supply battery 35 electrically connected to the control circuit board 32, the power supply battery 35 being used to supply power to the control circuit board 32 and the drive motor 33; the control circuit board 32 is also provided with a charging interface 322 to charge the power supply battery 35 using an external power source. It should be noted that the control circuit board 32 may also be directly powered by an external power source.

[0051] In an embodiment of this utility model, the telescopic body 1 may have a connecting body 16, which has an external connecting thread 163; the adjusting body 2 has an internal connecting thread 21 that is screwed into the external connecting thread 163; the electric drive device 3 and the bidirectional clutch device 4 are installed in the connecting body 16 of the telescopic body 1, and the connecting body 16 protects the electric drive device 3 and the bidirectional clutch device 4. A sealing ring a is sandwiched between the output seat 42 of the bidirectional clutch device 4 and the inner wall of the connecting body 16 to prevent water ingress; the telescopic body 1 has a charging hole 162 corresponding to the charging interface 322, and a charging cap 3221 is fitted into the charging hole 162 to prevent water ingress; the telescopic body 1 has a button hole 161 that seals with the button cap 3211 to ensure the operation of the control button 321 and prevent water ingress; and the guide seat 41 can be fixedly connected to the connecting body 16 to achieve a fixed fit with the telescopic body 1.

[0052] In embodiments of this utility model, the length of the telescopic body 1 itself can be adjusted, which further improves the length adjustment range of the easy-to-use telescopic rod of this utility model. Specifically, the telescopic body 1 may include a telescopic main body 11 and a movable body 12 movably connected to the telescopic main body 11. The telescopic main body 11 is connected to the connecting body 16, and the movable body 12 is sleeved on the telescopic main body 11. The movable body 12 has a row of adjustment holes 121 along its axial direction. The telescopic body 1 is equipped with a positioning component 13 that is movably inserted into each adjustment hole 121 of the movable body 12, and a switch component 14 that controls whether the positioning component 13 is inserted into the adjustment hole 121, so that the user can select different adjustment holes 121 of the movable body 12 to cooperate with the positioning component 13, thereby realizing the length adjustment of the telescopic body 1.

[0053] In an embodiment of this utility model, the positioning component 13 may include a mounting base 131, a positioning base 132, a positioning spring 133, a positioning rack 134, and a positioning gear 135. The mounting base 131 is fixedly disposed on the telescopic body 11. The positioning base 132 is slidably connected to the mounting base 131, and the positioning base 132 is provided with a positioning pin 1321 for insertion into the adjustment hole 121, and the positioning base 132 is provided with positioning teeth 1322. The positioning spring 133 is sandwiched between the positioning base 132 and the mounting base 131, and the positioning spring 133 is used to drive the positioning pin 1321 into the adjustment hole 121. The positioning rack 134 is slidably connected to the mounting base 131, and the positioning gear 135 is rotatably engaged with the mounting base 131. The positioning gear 135, the positioning rack 134, and the positioning base 132 are slidably connected to each other. The positioning teeth 1322 engage; the switch assembly 14 cooperates with the positioning rack 134 and is used to drive the positioning rack 134 to move. When the user applies force to the switch assembly 14 and drives the positioning rack 134 to move, the positioning rack 134 drives the positioning seat 132 to move through the positioning gear 135, so that the positioning pin 1321 of the positioning seat 132 disengages from the adjustment hole 121 of the movable body 12. At this time, the movable body 12 and the telescopic body 11 can be moved relative to each other to adjust the length of the telescopic body 1. After the length of the telescopic body 1 is adjusted, the user releases the force applied to the switch assembly 14, the positioning spring 133 activates the positioning seat 132 to reset, so that the positioning pin 1321 is inserted into the corresponding adjustment hole 121, thereby positioning the movable body 12 and the telescopic body 11.

[0054] In an embodiment of this utility model, the switch assembly 14 includes a switch base 141, a switch button 142, a return spring 143, and a linkage rocker block 144. The switch base 141 is fixedly disposed on the telescopic body 11 and can be sealed with the telescopic body 11 to prevent water ingress. The switch button 142 is slidably connected to the switch base 141. The return spring 143 is disposed between the switch button 142 and the switch base 141 and is used to drive the switch button 142 to reset. The linkage rocker block 144 rotates with the switch base 141. The linkage block 144 is equipped with a pressing part 1441 and a linkage part 1442. The pressing part 1441 is used for pressing the switch button 142, and the linkage part 1442 is connected to the positioning rack 134 through the linkage rope 15. The user can press the switch button 142 to drive the linkage block 144 to rotate, and the linkage block 144 then drives the positioning rack 134 through the linkage rope 15. When the user releases the pressure on the switch button 142, the reset spring 143 drives the switch button 142 to reset.

[0055] In an embodiment of this utility model, the switch assembly 14 is disposed on one side of the telescopic body 11 in conjunction with the electric drive device 3, while the positioning assembly 13 is disposed on the other side of the telescopic body 11. This arrangement can reduce the interference of the switch assembly 14 on the movable body 12, thereby making the length adjustment range of the telescopic body 1 large.

[0056] It should be noted that the telescopic body 1 is not limited to the structure described above for length adjustment; the telescopic body 1 can also be length-adjusted by splicing multiple sections. Furthermore, the length of the telescopic body 1 can be fixed, allowing for the use of telescopic bodies 1 and adjusting bodies 2 of different lengths to create easy-to-use telescopic rods with varying length adjustment ranges.

[0057] In an embodiment of this utility model, the end of the telescopic body 1 away from the adjusting body 2 (i.e., the end of the movable body 12 away from the adjusting body 2) and the end of the adjusting body 2 away from the telescopic body 1 can both be connected to a fixed seat 5. The fixed seat 5 has a large area, which can improve the stability of the easy-to-use telescopic rod of this utility model against the fixed surface. The fixed seat 5 can have a rough surface pad.

[0058] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A dual-control telescopic mechanism, characterized in that: It includes a telescopic body and an adjusting body that moves in conjunction with the telescopic body. The telescopic body is equipped with an electric drive device, which engages with the adjusting body through a two-way clutch and drives the adjusting body to move relative to the telescopic body.

2. The dual-control telescopic mechanism as described in claim 1, characterized in that: The electric drive device has an electric shaft that can rotate in both directions. The electric shaft is connected to a two-way clutch device, which is keyed to an adjusting body. The adjusting body is threaded to a telescopic body.

3. The dual-control telescopic mechanism as described in claim 2, characterized in that: The bidirectional clutch device includes a guide seat, an output seat, an input seat, and at least two clutch balls. The guide seat is fixedly fitted to the telescopic body and is magnetic. The output seat has an output column connected to the adjusting body and an output cylinder nested with the guide seat. A clutch cavity is formed between the output cylinder and the guide seat. At least two clutch grooves are provided circumferentially on the inner wall of the output cylinder. The input seat is connected to the electric shaft of the electric drive device and is rotatably fitted to the guide seat. The input seat has a toggle part located in the guide seat, and the toggle part has at least two clutch levers. Each clutch ball is housed in the clutch cavity and is located between two adjacent clutch levers. The clutch balls are magnetically attracted to the guide seat, and the clutch balls are movably engaged with the clutch grooves and movably abut against the clutch levers. When the two-way clutch is in the disengaged state, each clutch ball disengages from the clutch groove of the output cylinder and the clutch ball magnetically engages with the guide seat. When the two-way clutch is engaged, each clutch ball is pushed into the clutch groove by the clutch lever, so that each clutch lever forms a circumferential limiting fit with the output cylinder through the clutch ball.

4. The dual-control telescopic mechanism as described in claim 2, characterized in that: The telescopic body has a connecting body with an external thread; the adjusting body has an internal thread that is screwed into the external thread; the electric drive device and the bidirectional clutch device are installed in the connecting body of the telescopic body, and a sealing ring is sandwiched between the output seat of the bidirectional clutch device and the inner wall of the connecting body.

5. The dual-control telescopic mechanism as described in claim 4, characterized in that: The electric drive device is provided with a charging interface and at least one control button. The control button is fitted with a button cap. The connecting body of the telescopic body is provided with a button hole that seals with the button cap. The connecting body of the telescopic body is also provided with a charging hole corresponding to the charging interface, and a charging cap is fitted into the charging hole.

6. The dual-control telescopic mechanism as described in claim 2, characterized in that: The electric drive device includes a control circuit board, a drive motor, a reduction mechanism, and an electric shaft. The drive motor is connected to the electric shaft through the reduction mechanism. The control circuit board is connected to the drive motor and has at least one control button.

7. The dual-control telescopic mechanism as described in claim 6, characterized in that: The electric drive device also includes a power supply battery electrically connected to the control circuit board; the control circuit board is also provided with a charging interface.

8. An easy-to-use telescopic pole, characterized in that: Includes the dual-control telescopic mechanism as described in claim 1.

9. The easy-to-use telescopic pole as described in claim 8, characterized in that: The telescopic body includes a telescopic main body and a movable body that is movably connected to the telescopic main body; The movable body is fitted with the telescopic main body, and the movable body has a row of adjustment holes along its axial direction; the telescopic main body is equipped with positioning components that are movably inserted into each adjustment hole of the movable body, as well as a switch component that controls whether the positioning components are inserted into the adjustment holes.

10. The easy-to-use telescopic pole as described in claim 9, characterized in that: The positioning assembly includes a mounting base, a positioning seat, a positioning spring, a positioning rack, and a positioning gear. The mounting base is fixedly mounted on the telescopic body. The positioning seat is slidably connected to the mounting base, and the positioning seat is provided with a positioning pin for insertion into the adjustment hole, and the positioning seat is provided with positioning teeth. The positioning spring is sandwiched between the positioning seat and the mounting base, and the positioning spring is used to drive the positioning pin to insert into the adjustment hole. The positioning rack is slidably connected to the mounting base, and the positioning gear is rotatably engaged with the mounting base, and the positioning gear meshes with the positioning teeth of the positioning rack and the positioning seat. The switch assembly cooperates with the positioning rack and is used to drive the positioning rack to move.

11. The easy-to-use telescopic pole as described in claim 10, characterized in that: The switch assembly includes a switch base, a switch button, a return spring, and a linkage rocker block. The switch base is fixedly mounted on the telescopic body, the switch button slides on the switch base, the return spring is located between the switch button and the switch base and is used to drive the switch button to reset, and the linkage rocker block is rotatably connected to the switch base. The linkage rocker block has a pressing part and a linkage part. The pressing part is for the switch button to press, and the linkage part is connected to the positioning rack through a linkage rope.

12. The easy-to-use telescopic pole as described in claim 8, characterized in that: The end of the telescopic body away from the adjusting body and the end of the adjusting body away from the telescopic body are both connected to a fixed base.

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