WO2018036259A1

WO2018036259A1 - Automatic telescopic selfie stick and automatic telescopic stick

Info

Publication number: WO2018036259A1
Application number: PCT/CN2017/090021
Authority: WO
Inventors: 叶世峰
Original assignee: 叶世峰
Priority date: 2016-08-23
Filing date: 2017-06-26
Publication date: 2018-03-01
Also published as: CN205979059U

Abstract

An automatic telescopic stick (10). The automatically telescopic stick (10) comprises a sleeve tube (14), a rotating shaft (12) and a threaded tube (13) separately received in the sleeve tube (14), and a motor (11) provided at one end of the sleeve tube (14) and used for driving the rotating shaft (12) to rotate. When the motor (11) drives the rotating shaft (12) to rotate, the rotating shaft (12) pushes the threaded tube (13) to move away from the motor (11), or the rotating shaft (12) drives the threaded tube (13) to retract to the motor (11). The automatic telescopic stick (10) achieves automatic adjustment and improves user experience. Also disclosed is a selfie stick with the automatic telescopic stick.

Description

Instruction manual Name: Self-timer lever and automatic telescopic rod for automatic telescopic

[0001] The utility model relates to the technical field of telescopic rods, in particular to an automatic telescopic self-timer rod and an automatic expansion rod.

Background technique

[0002] At present, the selfie stick is the most popular self-timer artifact. The selfie stick can be arbitrarily stretched within a preset length. Users only need to fix the phone or camera on the fixture of the selfie stick to achieve multi-angle self-timer. .

technical problem

[0003] In the prior art, the self-timer bar needs to repeatedly adjust the length of the self-timer in the self-timer process, and requires repeated manual operation by the user, which has the inconvenience of use and labor, and seriously affects the user's experience.

Problem solution

Technical solution

[0004] The utility model provides an automatic telescopic self-timer lever and an automatic telescopic rod, which can realize automatic adjustment and improve user experience.

[0005] In order to solve the above technical problem, one technical solution adopted by the present invention is: providing an automatic telescopic rod, comprising: a sleeve, a rotating shaft and a threaded tube respectively received in the sleeve, and being disposed at one end of the sleeve The motor for driving the rotating shaft rotates, and when the motor drives the rotating shaft to rotate, the rotating shaft pushes the threaded tube to move away from the motor, or the rotating shaft drives the threaded tube to contract in the direction of the motor.

[0006] wherein the sleeve includes a first sleeve, a second sleeve and a third sleeve disposed coaxially, the motor is disposed at one end of the first sleeve, and the second sleeve is movable and retractable relative to the first sleeve The third sleeve is movable and retractable relative to the second sleeve.

[0007] wherein the threaded tube comprises a first threaded tube and a second threaded tube, the first threaded tube is provided with an internal thread and an external thread, the second threaded tube is provided with an internal thread, and the first threaded tube is provided with a first limit at one end thereof The other end of the first threaded pipe is sleeved on the rotating shaft, and the internal thread of the first threaded pipe is matched with the external thread of the rotating shaft, and the second threaded pipe is provided with a second limiting portion at one end thereof, the second thread The other end of the tube is sleeved on the first thread And the internal thread of the second threaded pipe is engaged with the external thread of the first threaded pipe.

[0008] wherein, the outer diameter of the first limiting portion is equal to the inner diameter of the second threaded tube, the outer diameter of the second limiting portion is equal to the outer diameter of the second threaded tube, and the third limit of the rotating shaft away from the motor is provided. The outer diameter of the third limiting portion is equal to the inner diameter of the first threaded pipe.

[0009] wherein the other end of the first threaded tube is provided with a height of the internal thread of 3 cm to 5 cm, and the other end of the second threaded tube is provided with a height of the internal thread of 3 cm to 5 cm.

[0010] wherein, the outer diameter of the first limiting portion is larger than the inner diameter of the first threaded tube and smaller than the outer diameter of the first threaded tube, and the outer diameter of the second limiting portion is equal to the outer diameter of the second threaded tube.

[0011] wherein, one end of the rotating shaft away from the motor is provided with a first elastic piece corresponding to the external thread of the rotating shaft, and the inner thread of the first threaded tube is disposed near the end of the motor with a first groove for receiving the first elastic piece; One end of the threaded tube away from the motor is provided with a second elastic piece corresponding to the external thread of the first threaded tube, and the internal thread of the second threaded tube is disposed near the motor with a second groove for receiving the second elastic piece.

[0012] wherein, the height of the internal thread of the first threaded tube is the same as the height of the first threaded tube, and the height of the internal thread of the second threaded tube is the same as the height of the second threaded tube.

[0013] wherein the first sleeve, the second sleeve and the third sleeve are each provided with a limiting groove.

[0014] In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a self-timer lever that automatically expands, and the self-timer lever includes any of the above-mentioned automatic telescopic rods.

Advantageous effects of the invention

Beneficial effect

[0015] The utility model has the beneficial effects that the automatic telescopic rod of the present invention comprises a sleeve, a rotating shaft and a threaded tube respectively received in the sleeve, and is disposed at one end of the sleeve and is different from the prior art. In the motor that drives the rotating shaft to rotate, after the motor drives the rotating shaft to rotate, the rotating shaft pushes the threaded tube to move away from the motor, or the rotating shaft drives the threaded tube to contract in the direction of the motor; the utility model drives the rotating shaft to rotate by the motor, and further The automatic telescopic rod realizes automatic adjustment to improve the user experience.

Brief description of the drawing

DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are merely practical. Some of the novel embodiments may be used to obtain other figures from those skilled in the art without any inventive effort. among them:

1 is a cross-sectional view of an automatic telescopic rod according to a first embodiment of the present invention;

Figure 2 is a cross-sectional view of the automatic telescopic rod of Figure 1 fully retracted;

3 is a schematic structural view of a limiting groove of FIG. 1;

4 is a cross-sectional view of an automatic telescopic rod according to a second embodiment of the present invention;

[0021] FIG. 5 is a cross-sectional view of the automatic telescopic rod of FIG. 4 fully contracted;

6 is a schematic structural view of an automatic telescopic self-timer lever according to a first embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. All examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

The terms "first", "second", and "third" are used in the description of the present invention for the purpose of description only, and are not to be construed as indicating or implying the relative importance or implicitly indicating the indicated technical features. quantity. Thus, features defining "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

1 is a cross-sectional view of an automatic telescopic rod according to a first embodiment of the present invention. As shown in FIG. 1 , the automatic telescopic rod 10 disclosed in the embodiment can realize automatic expansion and contraction. The automatic telescopic rod 10 includes a sleeve 14 , a rotating shaft 12 and a threaded tube 13 respectively received in the sleeve 14 , and One end of the sleeve 14 is used to drive the motor 11 that rotates the rotating shaft 12.

In the present embodiment, the number of the sleeves 14 is three, including a first sleeve 141, a second sleeve 14 2 and a third sleeve 143 which are coaxially disposed. The inner diameter of the second sleeve 142 is smaller than the inner diameter of the first sleeve 141, and the inner diameter of the third sleeve 143 is smaller than the inner diameter of the second sleeve 142; thus, the second sleeve 142 can be retracted relative to the first sleeve 141, and the third sleeve 143 is movable and retractable relative to the second sleeve 142, it being understood that when the third sleeve 143 is contracted to The second sleeve 142 is internally bored, and the second sleeve 142, together with the third sleeve 143, is also co-contracted within the first sleeve 141.

[0027] The rotating shaft 12 is housed in the first sleeve 141, and an outer peripheral surface thereof is provided with an external thread.

[0028] The motor 11 is fixedly disposed at one end of the first sleeve 141, and the rotating shaft 12 is fixed on the motor 11, and the motor 11 drives the transmission shaft 12 to rotate. The motor 11 can drive the rotating shaft 12 to rotate in the first direction or the second direction, and the first direction is opposite to the second direction, for example, the first direction is a smooth direction and the second direction is a reverse direction.

In the present embodiment, the number of the threaded tubes 13 is two, including the first threaded tube 131 and the second threaded tube 132.

The first threaded tube 131 is provided with an internal thread and an external thread, and one end thereof is provided with a first limiting portion 133; the second threaded tube 132 is provided with an internal thread, and one end thereof is provided with a second limiting portion 134. The other end of the first threaded tube 131 is sleeved on the rotating shaft 12, and the internal thread of the first threaded tube 131 is externally threaded with the rotating shaft 12. The outer diameter of the first limiting portion 133 is equal to the inner diameter of the second threaded tube 132, so that the first limiting portion 133 is engaged with the second threaded tube 132 to prevent the first threaded tube 131 from rotating relative to the rotating shaft 12 And the first limiting portion 1 33 can also contract in the direction of the first threaded pipe 131 toward the motor 11, prevent the rotating shaft 12 from passing through the first threaded pipe 13 1, and move in the direction away from the motor 11 in the second threaded pipe 132. The second threaded tube 132 is prevented from coming off the first threaded tube 131.

[0030] The other end of the second threaded tube 132 is sleeved on the first threaded tube 131, and the internal thread of the second threaded tube 132 is matched with the external thread of the first threaded tube 131, and the outer diameter of the second limiting portion 134 It is equal to the outer diameter of the second threaded tube 132 so as to contract the second threaded tube 132 toward the motor 11 to prevent the first threaded tube 131 from passing through the second threaded tube 132. In other embodiments, a person skilled in the art can completely set the multi-section threaded pipe 13 according to the actual situation, for example, a four-section threaded pipe 13 and an intermediate threaded pipe, for example, the second section, the third section is the same as in this embodiment. The structure of the first threaded tube 131, the last threaded tube 13 is the same as the second threaded tube 132 in this embodiment, and will not be described herein. Similarly, when the number of the threaded tubes 13 is 4 吋, the number of the sleeves 14 is 5. Alternatively, the number of the sleeves 14 can be more than the number of the threaded tubes 13 2, that is, the first section and the last section The threaded tube 13 is not provided in the tube 14, specifically, the last section of the sleeve 14 is directly provided with an internal thread, and no threaded tube is provided. For example, the threaded tube 13 in this embodiment includes the first threaded tube 131, and the third The sleeve 143 is directly provided with an internal thread, and no second threaded tube 132 is provided.

[0031] One end of the rotating shaft 12 away from the motor 11 is provided with a third limiting portion 121, and the outer diameter of the third limiting portion 121 is equal to The inner diameter of the first threaded tube 131, the third limiting portion 121 is for moving the first threaded tube 131 away from the motor 11 to prevent the first threaded tube 131 from coming off the rotating shaft 12.

[0032] Preferably, the other end of the first threaded tube 131 is provided with a height hi of the internal thread of 3 cm to 5 cm, and the other end of the second threaded tube 132 is provided with a height h2 of the internal thread of 3 cm to 5 cm.

[0033] Preferably, the first limiting portion 133, the second limiting portion 134, and the third limiting portion 121 are preferably discs. The inner diameter of the first limiting portion 133 is smaller than the outer diameter of the third limiting portion 121, and the inner diameter of the second limiting portion 134 is smaller than the outer diameter of the first limiting portion 133.

[0034] The principle of expansion and contraction of the automatic telescopic rod 10 will be described in detail below.

[0035] After the automatic telescopic rod 10 is extended, the user drives the rotating shaft 12 to rotate by controlling the motor 11, for example, the rotating shaft 12 rotates in the first direction, and the first threaded tube 131 and the second threaded tube 132 are away from the motor 11. Directional movement.

[0036] First, the first threaded tube 131 moves away from the motor 11 until the third limiting portion 121 abuts the internal thread 吋 of the first threaded tube 131, and the rotating shaft 12 is caught by the third limiting portion 121. The threaded tube 131, the rotating shaft 12 drives the first threaded tube 131 to rotate together.

[0037] The second threaded tube 132 is then moved away from the motor 11 until the first limiting portion 133 abuts the internal thread 吋 of the second threaded tube 132, and the first threaded tube 131 is caught by the first limiting portion 133. Second threaded tube 132

, the 吋 motor 11 controls the rotating shaft 12 to stop rotating.

[0038] wherein the rotation of the rotating shaft 12 generates a thrust force on the first threaded tube 131 and the second threaded tube 132, since the first damping exists between the first sleeve 141 and the second sleeve 142, the second sleeve 142 and the first There is a second damping between the three sleeves 143.

[0039] When the first damping is less than or equal to the second damping 吋, the second sleeve 142 first protrudes relative to the first sleeve 141 under the action of the thrust, and the third sleeve 143 is contracted in the second sleeve Within 142. The second sleeve 142 then extends completely out of the first sleeve 141 and the third sleeve 143 extends relative to the second sleeve 142.

[0040] When the first damping is greater than the second damping 吋, the third sleeve 143 first protrudes relative to the second sleeve 142 under the action of the thrust, and the second sleeve 142 is contracted in the first sleeve 141 . Then, the third sleeve 143 is completely extended relative to the second sleeve 142, and the second sleeve 142 is extended relative to the first sleeve 141, as shown in FIG.

[0041] After the automatic telescopic rod 10 is contracted, the user drives the rotating shaft 12 to rotate by controlling the motor 11, for example, the rotating shaft 12 is rotated in the second direction, and the first threaded tube 131 and the second threaded tube 132 are contracted toward the motor 11.

[0042] First, the first threaded tube 131 is contracted toward the motor 11 until the third limiting portion 121 abuts the first threaded tube.

The first limiting portion 133 of the 131, the rotating shaft 12 drives the first threaded tube 131 to rotate.

[0043] Then, the second threaded tube 132 is contracted toward the motor 11 until the first limiting portion 133 is in contact with the second threaded tube

The second limiting portion 134 of the 132, the motor 11 controls the rotating shaft 12 to stop rotating.

[0044] When the first damping is less than or equal to the second damping 吋, the second sleeve 142 is first contracted relative to the first sleeve 141

The third sleeve 143 is fully extended relative to the second sleeve 142. The second sleeve 142 is then fully contracted relative to the first sleeve 141 and the third sleeve 143 is retracted relative to the second sleeve 142.

[0045] When the first damping is greater than the second damping bore, the third sleeve 143 is first contracted relative to the second sleeve 142, and the second sleeve 142 is fully extended relative to the first sleeve 141. Then at the third sleeve 143 relative to the second sleeve

The second sleeve 142 is fully contracted and the second sleeve 142 is contracted relative to the first sleeve 141. After the automatic telescopic rod 10 is fully contracted, as shown in Figure 2.

[0046] Optionally, as shown in FIG. 3, the first sleeve 141, the second sleeve 142, and the third sleeve 143 are each provided with a limit groove 15 for preventing the first sleeve Sliding occurs between the 141 and the second sleeve 142, the second sleeve 142, and the third sleeve 143.

[0047] Optionally, a rotation speed adjustment module (not shown) may be disposed between the motor 11 and the rotating shaft 12, and the rotation speed adjustment module is connected between the motor 11 and the rotating shaft 12 for adjusting the rotation of the rotating shaft 12. Speed, and then adjust the telescopic speed of the telescopic rod.

[0048] In this embodiment, the rotating shaft 12 is rotated by the motor 11, and the automatic telescopic rod 10 is automatically adjusted to improve the user experience.

[0049] The present invention further provides an automatic telescopic rod of the second embodiment, which is different from the automatic telescopic rod 10 disclosed in the first embodiment in that: as shown in FIG. 4, the first limit of the first threaded tube 231 The outer diameter of the seat portion 233 is larger than the inner diameter of the first threaded tube 231 and smaller than the outer diameter of the first threaded tube 231, and the outer diameter of the second limiting portion 232 is equal to the outer diameter of the second threaded tube 232.

[0050] The first elastic piece 221 of the rotating shaft 22 is disposed away from the outer end of the rotating shaft 22, and the inner thread of the first threaded tube 231 is disposed near the end of the motor 21 with the first elastic piece 221 A groove 235. The first threaded tube 231 is disposed away from the end of the motor 21 with a second elastic piece 236 that is aligned with the external thread of the first threaded tube 231. The internal thread of the second threaded tube 232 is disposed adjacent to the end of the motor 21 for receiving The second recess 237 of the second elastic piece 236.

[0051] After the first threaded tube 231 moves away from the motor 21, the first elastic piece 221 is pressed by the internal thread of the first threaded tube 231 until the first elastic piece 221 reaches the first groove 235, and the first elastic piece 221 Ejecting to catch the rotating shaft 22 and the first threaded tube 231; when the first threaded tube 231 is contracted toward the motor 21, the first elastic piece 221 is pressed by the internal thread of the first threaded tube 231, and the first elastic piece 221 is withdrawn The first groove 235. After the second threaded tube 232 moves away from the motor 21, the second elastic piece 236 is pressed by the internal thread of the second threaded tube 232 until the second elastic piece 236 reaches the second groove 237, and the second elastic piece 236 is ejected to The first threaded tube 231 and the second threaded tube 232 are clamped; when the second threaded tube 232 is contracted toward the motor 21, the second elastic piece 23 is pressed by the internal thread of the second threaded tube 232, and the second elastic piece 236 is withdrawn. The second groove 237.

[0052] The principle of expansion and contraction of the automatic telescopic rod is described in detail below.

[0053] After the automatic telescopic rod is extended, the user drives the rotating shaft 22 to rotate by controlling the motor 21, for example, the rotating shaft 22 rotates in the first direction, and the first threaded tube 231 and the second threaded tube 232 are away from the motor 21. Sports

[0054] First, the first threaded tube 231 moves away from the motor 21 until the first elastic piece 221 reaches the first groove.

235, the first elastic piece 221 is ejected to catch the rotating shaft 22 and the first threaded tube 231, and the rotating shaft 22 drives the first threaded tube 231 to rotate.

[0055] The second threaded tube 232 is then moved away from the motor 21 until the second spring 236 reaches the second groove.

237, the second elastic piece 236 is ejected to catch the first threaded pipe 231 and the second threaded pipe 232, and the first motor 1

1 Control the rotary axis 12 to stop the rotation.

[0056] wherein the rotation of the rotating shaft 22 generates a thrust force on the first threaded tube 231 and the second threaded tube 232, since the first damping is present between the first sleeve 241 and the second sleeve 242, the second sleeve 242 and the first There is a second damping between the three sleeves 243.

[0057] When the first damping is less than or equal to the second damping 吋, the second sleeve 242 first protrudes relative to the first sleeve 241 under the action of the thrust, and the third sleeve 243 is contracted in the second sleeve Within 242. The second sleeve 242 then extends completely out of the first sleeve 241 and the third sleeve 243 extends relative to the second sleeve 242.

[0058] When the first damping is greater than the second damping 吋, the third sleeve 243 first protrudes relative to the second sleeve 242 under the action of the thrust, and the second sleeve 242 is contracted in the first sleeve 241 . The third sleeve 243 then extends completely out of the second sleeve 242, and the second sleeve 242 extends relative to the first sleeve 241. Automatic expansion The rod is fully extended, as shown in Figure 4.

[0059] When the automatic telescopic rod is contracted, the user rotates the rotating shaft 22 by controlling the motor 21, for example, the rotating shaft 22 rotates in the second direction, and the first threaded tube 231 and the second threaded tube 232 are contracted toward the motor 21.

[0060] First, the first threaded tube 231 is contracted toward the motor 21, the first elastic piece 221 is pressed by the internal thread of the first threaded tube 231, and the first elastic piece 221 is withdrawn from the first groove 235 until the rotating shaft 22 is in contact with the first The first limiting portion 233 of the threaded tube 231, the rotating shaft 22 drives the first threaded tube 231 to rotate.

[0061] Then, the second threaded tube 232 is contracted toward the motor 21, the second elastic piece 236 is pressed by the internal thread of the second threaded tube 232, and the second elastic piece 236 is withdrawn from the second groove 237 until the first limiting portion 233 interferes. To the second threaded tube

The second limiting portion 234 of the 232, the motor 21 controls the rotating shaft 22 to stop rotating.

[0062] When the first damping is less than or equal to the second damping 吋, the second sleeve 242 is first contracted relative to the first sleeve 241

The third sleeve 243 is completely extended relative to the second sleeve 242. The second sleeve 242 is then fully contracted relative to the first sleeve 241 and the third sleeve 243 is retracted relative to the second sleeve 242.

[0063] When the first damping is greater than the second damping bore, the third sleeve 243 is first contracted relative to the second sleeve 242, and the second sleeve 242 is fully extended relative to the first sleeve 241. Then in the third sleeve 243 relative to the second sleeve

The second sleeve 242 is fully contracted and the second sleeve 242 is contracted relative to the first sleeve 241. Automatic telescopic rod is fully contracted吋

, as shown in Figure 5.

[0064] Preferably, the height of the internal thread of the first threaded tube 231 is the same as the height of the first threaded tube 231, and the height of the internal thread of the second threaded tube 232 is the same as the height of the second threaded tube 232. That is, the inner side of the first threaded tube 231 is entirely provided with internal threads, and the inner side of the second threaded tube 232 is entirely provided with internal threads. In other embodiments, one of ordinary skill in the art can set the height of the internal thread of the first threaded tube 231 and the height of the internal thread of the second threaded tube 232 as the case may be.

[0065] The present invention further provides an automatic telescopic self-timer lever. As shown in FIG. 6, the self-timer lever of the embodiment includes an automatic telescopic rod 81 and a fixing device 82, and the fixing device 82 is used for fixing a mobile phone or a camera, and automatically expanding and contracting. The lever 81 is in wireless communication with the mobile phone of the fixing device 82 through the Bluetooth module. The automatic telescopic rod 81 is preferably the structure of the automatic telescopic rod described in the first embodiment and the second embodiment, and details are not described herein.

[0066] In summary, the automatic telescopic rod of the present invention comprises a sleeve, a rotating shaft and a threaded tube respectively received in the sleeve, and a motor disposed at one end of the sleeve for driving the rotating shaft to rotate, and the rotating shaft is driven by the motor Rotate 吋, the rotating shaft pushes the threaded pipe to move away from the motor, or the rotating shaft drives the threaded pipe to contract in the direction of the motor; the utility model drives the rotating shaft to rotate by the motor, and then the automatic telescopic rod realizes automatic adjustment, thereby improving the user experience.

The above is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and the drawings of the present invention, or directly or indirectly applied to other The related technical fields are all included in the scope of patent protection of the present invention.

Claims

Claim

An automatic telescopic rod, wherein the automatic telescopic rod comprises a sleeve, a rotating shaft and a threaded tube respectively received in the sleeve, and one end of the sleeve is disposed for driving the rotating shaft to rotate The motor rotates the rotating shaft, the rotating shaft pushes the threaded tube to move away from the motor, or the rotating shaft drives the threaded tube to contract toward the motor.

The automatic telescopic rod according to claim 1, wherein the sleeve comprises a first sleeve, a second sleeve and a third sleeve disposed coaxially, and the motor is disposed at the first sleeve At one end, the second sleeve is movable and retractable relative to the first sleeve, and the third sleeve is movable and retractable relative to the second sleeve.

The automatic telescopic rod according to claim 2, wherein the threaded tube comprises a first threaded tube and a second threaded tube, the first threaded tube is provided with an internal thread and an external thread, and the second threaded tube An internal thread is disposed, one end of the first threaded tube is provided with a first limiting portion, the other end of the first threaded tube is sleeved on the rotating shaft, and the internal thread of the first threaded tube is The second threaded tube is provided with a second limiting portion at one end of the second threaded tube, the other end of the second threaded tube is sleeved on the first threaded tube, and the second The internal thread of the threaded tube cooperates with the external thread of the first threaded tube.

The automatic telescopic rod according to claim 3, wherein an outer diameter of the first limiting portion is equal to an inner diameter of the second threaded tube, and an outer diameter of the second limiting portion is equal to the second An outer diameter of the threaded tube is disposed at a distal end of the rotating shaft away from the motor, and a third limiting portion is disposed, and an outer diameter of the third limiting portion is equal to an inner diameter of the first threaded tube.

The automatic telescopic rod according to claim 4, wherein the other end of the first threaded tube is provided with an internal thread having a height of 3 cm to 5 cm, and the other end of the second threaded tube is provided with an internal thread having a height of 3 cm. -5cm.

The automatic telescopic rod according to claim 3, wherein an outer diameter of the first limiting portion is larger than an inner diameter of the first threaded tube and smaller than an outer diameter of the first threaded tube, the second The outer diameter of the limiting portion is equal to the outer diameter of the second threaded tube.

The automatic telescopic rod according to claim 6, wherein the rotating shaft is away from the One end of the motor is provided with a first elastic piece corresponding to the external thread of the rotating shaft, and an internal thread of the first threaded pipe is disposed near one end of the motor with a first groove for accommodating the first elastic piece; a second elastic piece corresponding to the external thread of the first threaded pipe is disposed at one end of the first threaded pipe away from the motor, and an internal thread of the second threaded pipe is disposed near one end of the motor for accommodating The second groove of the second elastic piece is described.

[Claim 8] The automatic telescopic rod according to claim 7, wherein the height of the internal thread of the first threaded tube is the same as the height of the first threaded tube, and the inside of the second threaded tube The height of the thread is the same as the height of the second threaded tube.

[Claim 9] The automatic telescopic rod according to claim 2, wherein the first sleeve, the second sleeve, and the third sleeve are each provided with a limit groove.

[Claim 10] An automatic telescopic self-timer lever, characterized in that the self-timer lever includes the automatic telescopic rod according to any one of claims 1-9.