CN114114251A - Automatic locking expansion device applied to distributed radar life detection instrument - Google Patents
Automatic locking expansion device applied to distributed radar life detection instrument Download PDFInfo
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- CN114114251A CN114114251A CN202111359313.2A CN202111359313A CN114114251A CN 114114251 A CN114114251 A CN 114114251A CN 202111359313 A CN202111359313 A CN 202111359313A CN 114114251 A CN114114251 A CN 114114251A
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- guide
- telescopic device
- inner tube
- automatic locking
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/887—Radar or analogous systems specially adapted for specific applications for detection of concealed objects, e.g. contraband or weapons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
本发明公开了生命探测仪领域的一种应用于分布式雷达生命探测仪的自动锁止伸缩装置，包括伸缩装置、雷达单元一和雷达单元二，所述伸缩装置两端部均设置有旋转装置，所述雷达单元一和所述雷达单元二分别设置在两个所述旋转装置的底端。本发明可以通过推动滑板，使得过渡斜面将定位柱向上顶起，进而使得定位柱与导向定位条上的定位孔分开，可以沿着内管滑动第一伸缩外壳，实现对伸缩装置的长度进行调节，松开开关时，可以在弹簧的反向作用下，使得开关恢复到原位，当调节到另一个定位孔处时，在弹簧的作用下，使得定位柱与定位孔配合，实现对伸缩装置在伸长位置或者伸缩位置的自动锁紧固定，极其方便。
The invention discloses an automatic locking telescopic device applied to a distributed radar life detector in the field of life detectors. , the radar unit 1 and the radar unit 2 are respectively arranged at the bottom ends of the two rotating devices. In the present invention, by pushing the sliding plate, the transition slope can push the positioning column upward, so that the positioning column is separated from the positioning hole on the guide positioning strip, and the first telescopic casing can be slid along the inner tube to realize the adjustment of the length of the telescopic device. , When the switch is released, the switch can be restored to its original position under the reverse action of the spring. When it is adjusted to another positioning hole, under the action of the spring, the positioning column is matched with the positioning hole to realize the adjustment of the telescopic device. The automatic locking and fixing in the extended position or the telescopic position is extremely convenient.
Description
Technical Field
The invention relates to the field of life detection instruments, in particular to an automatic locking telescopic device applied to a distributed radar life detection instrument.
Background
The radar life detection instrument is high-tech lifesaving equipment which is developed by integrating a micropower ultra-wideband radar technology and a biomedical engineering technology, is specially used for emergency rescue tasks such as earthquake disasters, landslide accidents and the like, effectively improves rescue quality and work efficiency, analyzes and judges whether a living body exists in the ruins and specific position information of the living body based on a time domain Doppler effect generated by human body movement on radar echo, and is a basic adjusting structure of a distributed radar life detection instrument. Accordingly, one skilled in the art provides an automatic locking retractor device for a distributed radar life detection device to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide an automatic locking telescopic device applied to a distributed radar life detection instrument, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an automatic locking expansion device applied to a distributed radar life detection instrument comprises an expansion device, a first radar unit and a second radar unit, wherein rotating devices are arranged at two end parts of the expansion device, the first radar unit and the second radar unit are respectively arranged at the bottom ends of the two rotating devices, the first radar unit, the second radar unit and the rotating devices are connected through screws, the expansion device is connected with the rotating devices through screws, the expansion device comprises a first expansion shell, a second expansion shell, a switch, an inner pipe, a sliding plate, a positioning column, a spring, a sliding block upper cover, a sliding block box body, a guiding and positioning strip and a POM ring, the inner pipe is positioned inside the first expansion shell, the inner pipe is inserted into the second expansion shell, and the inner pipe and the second expansion shell are connected through screws, and a cable penetrating through the interior of the telescopic device is connected between the first radar unit and the second radar unit.
As a further scheme of the invention: the POM ring is arranged in a clamping groove in the outer wall of one end of the inner tube, the inner tube is in sliding connection with the first telescopic shell through the POM ring, a guide groove is formed in the side wall of the inner tube, a line passing hole is formed in the inner tube in an integrated mode, and the guide groove penetrates through the POM ring.
As a further scheme of the invention: the slider upper cover sets up inside the inner tube, slider upper cover bottom both sides integrated into one piece has the guide post, sliding connection has the reference column on the guide post, the reference column includes the cylinder, set up in cylinder top middle part guiding hole, integrated into one piece in reference column outlying supporting platform board is in with the setting the side deflector of supporting platform board both sides.
As a further scheme of the invention: the guide post with guiding hole sliding connection, the spring sets up the guiding hole internal portion is located the periphery of guide post, the spring with the slider upper cover and on the reference column the equal card of supporting platform board is pressed and is connected.
As a further scheme of the invention: the supporting platform board with side deflector integrated into one piece, the supporting platform board with cylinder integrated into one piece.
As a further scheme of the invention: the guide positioning strip is arranged in the guide groove of the inner tube and is in sliding connection with the guide groove, the guide positioning strip is provided with a positioning hole and a fixing hole, and the guide positioning strip is fixedly connected with the inner tube through a screw penetrating through the inner tube in the fixing hole.
As a further scheme of the invention: the slide plate is arranged between the upper part of the guide positioning strip and the upper cover of the slide block, the switch is fixed at the bottom of one end of the slide plate through a screw, and the switch penetrates through the inner tube.
As a further scheme of the invention: the guiding orientation strip is including offering in the locking via hole at both ends, setting are in on the guiding orientation strip the jack-up piece of locking via hole one side, setting are in the transition inclined plane of locking via hole opposite side, the side guide strip that sets up in one of them transition inclined plane one side and setting are in the movable stopper of guiding orientation strip one end bottom.
As a further scheme of the invention: the locking via hole is waist type slot hole, the activity stopper and the side guide strip with the homogeneous body shaping of direction location strip, the slider box body sets up the guide way outside on the inner tube.
As a further scheme of the invention: the slider box body with guide way sliding connection, the locating hole has all been seted up to slider box body top both sides, the fixed orifices has been seted up to locating hole one side, the locating hole with cylinder sliding fit, the slider box body with first flexible shell passes through the inside screw fixed connection of fixed orifices.
Compared with the prior art, the invention has the beneficial effects that:
1. the sliding plate is pushed, so that the transition inclined surface jacks up the positioning column, the positioning column is separated from the positioning hole in the guide positioning strip, the first telescopic shell can slide along the inner tube, the length of the telescopic device is adjusted, when the switch is loosened, the switch can be restored to the original position under the reverse action of the spring, when the switch is adjusted to the other positioning hole, the positioning column is matched with the positioning hole under the action of the spring, and the automatic locking and fixing of the telescopic device at the extension position or the telescopic position are realized, so that the telescopic device is extremely convenient;
2. according to the invention, when the inner pipe slides in the first telescopic shell, the POM ring is arranged on the periphery of the inner pipe, and the POM ring material has a self-lubricating characteristic, so that the user experience is improved, the metal dry friction after lubricating oil is dried up is avoided, and the movement reliability of the telescopic device can be greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a view showing the construction of the retractor of the present invention;
FIG. 3 is a cross-sectional view of the retractor of the present invention;
FIG. 4 is a view showing the structure of the extendable device of the present invention after being extended;
FIG. 5 is a cross-sectional view of the retractor of the present invention shown extended;
FIG. 6 is a view showing the construction of the inner tube portion in the present invention;
FIG. 7 is a left side sectional view of the inner tube of the present invention at the cylindrical portion;
FIG. 8 is a structural view of a first telescoping housing of the present invention;
FIG. 9 is a view showing the construction of the guide positioning bar of the present invention;
FIG. 10 is a structural view of the slide plate of the present invention;
FIG. 11 is a schematic view of a positioning post of the present invention.
In the figure: 1. a first radar unit; 2. a second radar unit; 3. a rotating device; 4. a telescoping device; 5. a first telescoping outer shell; 6. a second telescoping outer shell; 7. a switch; 8. an inner tube; 8-1, a guide groove; 8-2, a wire through hole; 9. a slide plate; 9-1, transition inclined plane; 9-2, a jacking block; 9-3, locking the through hole; 9-4, a movable limiting block; 9-5, side guide strips; 10. a positioning column; 10-1, a guide hole; 10-2, cylindrical; 10-3, supporting a platform plate; 10-4, side guide plates; 11. a spring; 12. a cable; 13. an upper cover of the slide block; 13-1, a guide post; 14. a slider case; 15. a guiding and positioning strip; 15-1, positioning holes; 15-2, fixing holes; 16. and (3) a POM ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 11, in the embodiment of the present invention, an automatic locking retractor device applied to a distributed radar life detector includes a retractor device 4, a first radar unit 1 and a second radar unit 2, both ends of the retractor device 4 are provided with rotating devices 3, the first radar unit 1 and the second radar unit 2 are respectively disposed at the bottom ends of the two rotating devices 3, the first radar unit 1 and the second radar unit 2 are connected to the rotating devices 3 through screws, the retractor device 4 is connected to the rotating devices 3 through screws, the retractor device 4 includes a first retractor housing 5, a second retractor housing 6, a switch 7, an inner tube 8, a sliding plate 9, a positioning post 10, a spring 11, a slider upper cover 13, a slider box 14, a guiding and positioning bar 15 and a POM ring 16, the inner tube 8 is located inside the first retractor housing 5, the inner tube 8 is inserted into the second retractor housing 6, and the inner tube 8 is connected to the second retractor housing 6 through screws, be connected with between radar unit 1 and the radar unit two 2 and pass the inside cable 12 of telescoping device 4, through the flexible of telescoping device 4, can change the antenna array base length in radar unit 1 and the radar unit two 2, it is adjustable to realize radar resolution ratio, radar unit 1 and radar unit two 2 have had certain clearance under the extension mode, rely on rotary device 3, rotational positioning function can be realized to radar unit 1 and radar unit two 2, the polarization direction of its inside antenna array can the independent assortment, realize the independent assortment of two antenna array test directions, form multipolar or full polarization detection function.
The POM ring 16 is arranged in a clamping groove in the outer wall of one end of the inner tube 8, the inner tube 8 is connected with the first telescopic shell 5 in a sliding mode through the POM ring 16, a guide groove 8-1 is formed in the side wall of the inner tube 8, a line passing hole 8-2 is formed in the inner tube 8 in an integrated mode, the guide groove 8-1 penetrates through the POM ring 16, the inner tube 8 slides in the first telescopic shell 5, the length adjustment POM ring of the telescopic device 4 can have a self-lubricating characteristic, user experience is improved, metal dry friction after lubricating oil is dried up is avoided, and reliability of movement of the telescopic device can be greatly improved.
The inner tube 8 is provided with an upper sliding block cover 13, guide columns 13-1 are integrally formed on two sides of the bottom end of the upper sliding block cover 13, positioning columns 10 are connected to the guide columns 13-1 in a sliding mode, each positioning column 10 comprises a cylinder 10-2, a middle guide hole 10-1 is formed in the middle of the upper portion of the cylinder 10-2, a supporting platform plate 10-3 is integrally formed on the periphery of the positioning column 10, and side guide plates 10-4 are arranged on two sides of the supporting platform plate 10-3.
The guide post 13-1 is connected with the guide hole 10-1 in a sliding mode, the spring 11 is arranged inside the guide hole 10-1 and located on the periphery of the guide post 13-1, and the spring 11 is connected with the upper sliding block cover 13 and the supporting platform plate 10-3 on the positioning post 10 in a clamping and pressing mode.
The supporting platform plate 10-3 and the side guide plate 10-4 are integrally formed, the supporting platform plate 10-3 and the cylinder 10-2 are integrally formed, the guide positioning strip 15 is arranged in the guide groove 8-1 of the inner tube 8 and is in sliding connection with the guide groove 8-1, the guide positioning strip 15 is arranged on the positioning hole 15-1 and the fixing hole 15-2, and the guide positioning strip 15 and the inner tube 8 are fixedly connected through a screw penetrating through the fixing hole 15-2.
Wherein, slide 9 sets up between direction location strip 15 top and slider upper cover 13, and switch 7 passes through the fix with screw in slide 9 one end bottom, and switch 7 runs through inner tube 8 setting, can pull slide 9 through switch 7 and slide.
The guide positioning strip 15 comprises locking through holes 9-3 arranged at two ends of the guide positioning strip 15, a jacking block 9-2 arranged at one side of the locking through hole 9-3, a transition inclined plane 9-1 arranged at the other side of the locking through hole 9-3, a side guide strip 9-5 arranged at one side of one transition inclined plane 9-1 and a movable limiting block 9-4 arranged at the bottom of one end of the guide positioning strip 15, wherein the movable limiting block 9-4 can limit the sliding of the guide positioning strip 15, the locking through hole 9-3 is a waist-shaped long hole, the movable limiting block 9-4 and the side guide strip 9-5 are integrally formed with the guide positioning strip 15, and a slider box body 14 is arranged outside a guide groove 8-1 on the inner tube 8.
The slider box body 14 is connected with the guide groove 8-1 in a sliding mode, positioning holes 15-1 are formed in the two sides above the slider box body 14, fixing holes 15-2 are formed in one side of each positioning hole 15-1, the positioning holes 15-1 are in sliding fit with the cylinders 10-2, the extension position and the contraction position of the telescopic device 4 can be fixed quickly, and the slider box body 14 is fixedly connected with the first telescopic shell 5 through screws in the fixing holes 15-2.
The working principle of the invention is as follows: the positioning column 10 can be jacked upwards by the transition inclined plane 9-1 by pushing the sliding plate 9, so that the positioning column 10 is separated from the positioning hole 15-1 on the guide positioning strip 15, the first telescopic shell 5 can slide along the inner tube 8, the length of the telescopic device 4 can be adjusted, when the switch 7 is loosened, the switch 7 can be restored to the original position under the reverse action of the spring 11, when the other positioning hole 15-1 is adjusted, the positioning column 10 is matched with the positioning hole 15-1 under the action of the spring 11, the automatic locking and fastening of the telescopic device 4 at the extension position or the telescopic position can be realized, the operation is extremely convenient, when the inner tube 8 slides in the first telescopic shell 5, the POM ring 16 is arranged on the periphery of the inner tube 8, the POM ring 16 material has the self-lubricating characteristic, the user experience is improved, and the metal dry friction after the lubricating oil is dried up is avoided, the reliability of the movement of the telescopic device can be greatly improved, the reliability of the movement of the telescopic device 4 can be greatly improved, and the guide groove 8-1 below the inner pipe 8 is matched with the guide positioning strip 15, so that the accurate positioning in the sliding direction can be realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides an automatic locking telescoping device for distributed radar life detection instrument, includes telescoping device (4), radar unit one (1) and radar unit two (2), its characterized in that: the two ends of the telescopic device (4) are respectively provided with a rotating device (3), the first radar unit (1) and the second radar unit (2) are respectively arranged at the bottom ends of the two rotating devices (3), the first radar unit (1) and the second radar unit (2) are connected with the rotating devices (3) through screws, the telescopic device (4) is connected with the rotating devices (3) through screws, the telescopic device (4) comprises a first telescopic shell (5), a second telescopic shell (6), a switch (7), an inner tube (8), a sliding plate (9), a positioning column (10), a spring (11), a sliding block upper cover (13), a sliding block box body (14), a guiding and positioning strip (15) and a POM ring (16), the inner tube (8) is positioned in the first telescopic shell (5), and the inner tube (8) is inserted into the second telescopic shell (6), and the inner pipe (8) is connected with the second telescopic shell (6) through a screw, and a cable (12) penetrating through the inside of the telescopic device (4) is connected between the first radar unit (1) and the second radar unit (2).
2. The automatic locking telescopic device applied to the distributed radar life detection instrument according to claim 1, is characterized in that: the POM ring (16) is arranged in a clamping groove in the outer wall of one end of the inner tube (8), the inner tube (8) is connected with the first telescopic shell (5) in a sliding mode through the POM ring (16), a guide groove (8-1) is formed in one side wall of the inner tube (8), a wire passing hole (8-2) is formed in the inner portion of the inner tube (8) in an integrated mode, and the guide groove (8-1) penetrates through the POM ring (16) to be arranged.
3. The automatic locking telescopic device applied to the distributed radar life detection instrument is characterized in that according to claim 2: slider upper cover (13) set up inside inner tube (8), slider upper cover (13) bottom both sides integrated into one piece has guide post (13-1), sliding connection has reference column (10) on guide post (13-1), reference column (10) include cylinder (10-2), set up in cylinder (10-2) top middle part guiding hole (10-1), integrated into one piece in reference column (10) outlying supporting platform board (10-3) and setting are in side deflector (10-4) of supporting platform board (10-3) both sides.
4. The automatic locking telescopic device applied to the distributed radar life detection instrument is characterized in that: guide post (13-1) with guide hole (10-1) sliding connection, spring (11) set up inside being located of guide hole (10-1) the periphery of guide post (13-1), spring (11) with slider upper cover (13) and on reference column (10) the equal card of supporting platform board (10-3) is pressed and is connected.
5. The automatic locking telescopic device applied to the distributed radar life detection instrument is characterized in that: the supporting platform plate (10-3) and the side guide plate (10-4) are integrally formed, and the supporting platform plate (10-3) and the cylinder (10-2) are integrally formed.
6. The automatic locking telescopic device applied to the distributed radar life detection instrument is characterized in that: the guide positioning strip (15) is arranged in a guide groove (8-1) of the inner pipe (8) and is in sliding connection with the guide groove (8-1), the guide positioning strip (15) is provided with a positioning hole (15-1) and a fixing hole (15-2), and the guide positioning strip (15) is fixedly connected with the inner pipe (8) through a screw penetrating through the fixing hole (15-2).
7. The automatic locking telescopic device applied to the distributed radar life detection instrument is characterized in that: the sliding plate (9) is arranged above the guide positioning strip (15) and between the sliding block upper cover (13), the switch (7) is fixed to the bottom of one end of the sliding plate (9) through a screw, and the switch (7) penetrates through the inner tube (8).
8. The automatic locking telescopic device applied to the distributed radar life detection instrument according to claim 7, wherein: the guide positioning strip (15) comprises locking through holes (9-3) arranged at two ends of the guide positioning strip (15), a jacking block (9-2) arranged on one side of the locking through holes (9-3), a transition inclined plane (9-1) arranged on the other side of the locking through holes (9-3), a side guide strip (9-5) arranged on one side of one transition inclined plane (9-1) and a movable limiting block (9-4) arranged at the bottom of one end of the guide positioning strip (15).
9. The automatic locking telescopic device applied to the distributed radar life detection instrument according to claim 8, wherein: the locking through hole (9-3) is a waist-shaped long hole, the movable limiting block (9-4) and the side guide strip (9-5) and the guide positioning strip (15) are integrally formed, and the sliding block box body (14) is arranged on the outer side of a guide groove (8-1) on the inner pipe (8).
10. The automatic locking telescopic device applied to the distributed radar life detection instrument according to claim 9, wherein: the sliding block box body (14) is connected with the guide groove (8-1) in a sliding mode, positioning holes (15-1) are formed in the two sides of the upper portion of the sliding block box body (14), fixing holes (15-2) are formed in one side of each positioning hole (15-1), the positioning holes (15-1) are in sliding fit with the cylinders (10-2), and the sliding block box body (14) is fixedly connected with the first telescopic shell (5) through screws in the fixing holes (15-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359313.2A CN114114251A (en) | 2021-11-17 | 2021-11-17 | Automatic locking expansion device applied to distributed radar life detection instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359313.2A CN114114251A (en) | 2021-11-17 | 2021-11-17 | Automatic locking expansion device applied to distributed radar life detection instrument |
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| CN114114251A true CN114114251A (en) | 2022-03-01 |
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| CN202111359313.2A Pending CN114114251A (en) | 2021-11-17 | 2021-11-17 | Automatic locking expansion device applied to distributed radar life detection instrument |
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| CN206972680U (en) * | 2017-05-25 | 2018-02-06 | 东莞市扎克电子科技有限公司 | A Selfie telescopic rod |
| CN208431240U (en) * | 2018-05-29 | 2019-01-25 | 苏州凯弘橡塑有限公司 | A kind of automatic locking telescoping tube |
| CN109667998A (en) * | 2018-06-26 | 2019-04-23 | 广东和睦家水科技有限公司 | A kind of retractable connecting tube |
| CN208997113U (en) * | 2018-09-21 | 2019-06-18 | 广东为众消防科技股份有限公司 | A kind of telescopic rod and its fire-fighting opium pipe of application |
| CN110500349A (en) * | 2019-01-17 | 2019-11-26 | 深圳前海帕拓逊网络技术有限公司 | A kind of telescopic rod and cleaning brush for adjustment length |
| CN210484294U (en) * | 2019-01-17 | 2020-05-08 | 深圳前海帕拓逊网络技术有限公司 | A telescopic link and cleaning brush for adjusting length |
| CN209925374U (en) * | 2019-01-22 | 2020-01-10 | 顺丰科技有限公司 | a telescopic mechanism |
| CN211370919U (en) * | 2019-09-24 | 2020-08-28 | 西安麦德凯智能科技有限公司 | Telescopic tube structure |
| CN111398953A (en) * | 2020-04-28 | 2020-07-10 | 湖南正申科技有限公司 | Telescopic distributed radar life detection positioning equipment |
| CN111398951A (en) * | 2020-04-28 | 2020-07-10 | 湖南正申科技有限公司 | Rotatable distributed radar life detection positioning equipment |
| CN214092616U (en) * | 2020-06-19 | 2021-08-31 | 源德盛塑胶电子（深圳）有限公司 | Telescopic rod |
| CN112283221A (en) * | 2020-08-10 | 2021-01-29 | 厦门群典家居饰品有限公司 | Extension tube assembly |
| CN213808346U (en) * | 2020-10-29 | 2021-07-27 | 杭州华一强实业有限公司 | Telescopic rod with reinforcing structure |
| CN112576584A (en) * | 2020-12-08 | 2021-03-30 | 东阳市优至工贸有限公司 | Push type adjusting and locking device of telescopic rod |
| CN112696409A (en) * | 2020-12-08 | 2021-04-23 | 东阳市优至工贸有限公司 | Rocker type adjusting and locking device of telescopic rod |
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