Insulating telescopic rod

Abstract

The insulating telescopic rod comprises a telescopic rod body and a conductive core, and a containing channel penetrating through the two ends of the telescopic rod body is formed in the telescopic rod body; the conductive core is of a telescopic structure and is arranged in the containing channel, the two ends of the conductive core are fixedly connected with the two ends of the telescopic rod body respectively, and the conductive core stretches out and draws back synchronously along with stretching out and drawing back of the telescopic rod body. The technical scheme has the beneficial effects that the length of the telescopic rod body can be changed as required so as to adapt to different operation distances. The conductive core can conduct an operation object and a device needing to be connected without winding, and the conductive core is located in the telescopic rod body, so that the conductive core is not interfered by the outside and does not affect external operation, and is more convenient and safer for an operator.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrician's tool technical field, concretely relates to an insulating telescopic rod. BACKGROUND

[0002] In some live working, because the object to be operated is far away, and the voltage is high, it needs to use the insulating telescopic rod to operate. The operation specifically includes electricity testing and grounding, etc. In order to realize these operations, the operating tool is arranged at the end of the telescopic rod, and these operating tools need to be grounded through the wire or connected with other equipment. These wires have the problems of winding and being interfered by the outside world, and are inconvenient to use. UTILITY MODEL CONTENTS

[0003] In view of the defects in the prior art, the utility model provides an insulating telescopic rod, which can ensure safe conduction and avoid the winding of the conductive wire.

[0004] The utility model provides a technical scheme, which is an insulating telescopic rod, which comprises:

[0005] A telescopic rod body is internally provided with an accommodating channel penetrating through both ends thereof;

[0006] A conductive core is arranged in the accommodating channel and is in a telescopic structure. Both ends of the conductive core are fixedly connected with both ends of the telescopic rod body, and the conductive core synchronously telescopes with the telescopic rod body.

[0007] The beneficial effects of the above technical scheme are as follows: the telescopic rod body can change the length as required to adapt to different operation distances. The conductive core can conduct the operation object and the equipment to be connected, and winding does not occur. Since the conductive core is located in the interior of the telescopic rod body, it is not interfered by the outside world and does not affect the operation of the outside world. For the operator, it is more convenient and safe.

[0008] Further, the telescopic rod body comprises a holding rod and a plurality of telescopic rod body units which are sequentially and slidably sleeved and connected with the holding rod. The top end of the holding rod and the top end of the telescopic rod body unit are both provided with an upper end cover which prevents the adjacent telescopic rod body unit from being separated. The joint of the telescopic rod body is further provided with a locking member.

[0009] Further, the locking member is arranged at the lower end of the telescopic rod body unit. The locking member comprises a locking shaft which is coaxially connected with the telescopic rod body. The locking shaft is circumferentially provided with a variable-diameter arc edge. The locking shaft is externally provided with an expansion part. The variable-diameter arc edge extrudes the expansion part when the telescopic rod body unit rotates to lock the telescopic rod body.

[0010] Furthermore, the expansion part includes two docking action blocks, the outside of the two action blocks is covered with an elastic layer, and the inner side of the action blocks is provided with a ridge in contact with the variable diameter arc edge. When locking, the two action blocks are pushed away from each other by the variable diameter arc edge to press the elastic layer against the inner wall of the telescopic rod body.

[0011] Furthermore, the variable diameter arc edge has two sections, and the two sections of the variable diameter arc edge are centrally symmetrically distributed along the axis of the locking shaft and correspond one-to-one to the two action blocks.

[0012] Furthermore, an electroscope is provided at the end of the telescopic rod.

[0013] Furthermore, a resistor is conductively connected between the electroscope and the conductive core.

[0014] Furthermore, a lower end cover is provided at the bottom end of the gripping rod, and an aviation plug is also provided on the lower end cover, and the aviation plug is electrically connected to the conductive core.

[0015] Furthermore, a fixing plate is provided at the bottom end of the conductive core, and a groove for accommodating the fixing plate is provided at the top end of the lower end cover. The fixing plate is fixed in the groove to fix the bottom end of the conductive core to the lower end cover.

[0016] Furthermore, a connecting sleeve is provided at the top of the conductive core, the connecting sleeve is fixed to the top of the telescopic rod body, and a fixing hole for connecting the resistor is also provided at the top of the connecting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the lower portion of the telescopic rod body in an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional view of the upper portion of the telescopic rod body in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic structural diagram of a locking member in an embodiment of the utility model;

[0022] Figure 5 This is an axial schematic diagram of the locking member in the embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the end portion of the telescopic rod body in an embodiment of the utility model.

[0024] Figure numerals: holding rod 100, upper end cover 110, blocking edge 111, lower end cover 120, aviation plug 121, second spring 122, rod body unit 200, conductive core 300, fixing plate 310, connecting sleeve 320, locking shaft 400, reducing arc edge 401, step 402, docking sleeve 410, action block 420, ridge 421, elastic layer 430, annular groove 431, electroscope 500, resistor 600, bakelite sleeve 610, first copper stud 620, first spring 621, second copper stud 630. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0027] like Figure 1-6 As shown, this embodiment provides an insulating telescopic rod comprising a telescopic rod body made of insulating material and a conductive core 300 made of conductive material. The telescopic rod body is constructed with a receiving channel extending through both ends. The telescopic rod body can be adjusted according to the distance between the operating object and the operator to ensure normal operation. The conductive core 300 is a telescopic structure formed by multiple sections of conductive metal rods connected in sequence and positioned within the receiving channel. The ends of the conductive core 300 are fixedly connected to the ends of the telescopic rod body, and the conductive core 300 extends and retracts synchronously with the extension and contraction of the telescopic rod body. In other words, when the telescopic rod body extends, the conductive core 300 also extends. When the telescopic rod body shortens, the conductive core 300 also shortens. The conductive core 300 does not hinder the extension and retraction of the telescopic rod body and remains conductive even when the length of the telescopic rod body changes. The conductive core 300 is used to connect equipment that requires electrical communication with the operating object, such as grounding equipment or detection equipment. The conductive core 300 will not be entangled and is located inside the telescopic rod body, so it will not be disturbed by the outside world and will not affect the operation of the outside world, which is more convenient and safer for the operator. The number of metal rods of the conductive core 300 is preferably the same as the number of sections of the telescopic rod body.

[0028] In some embodiments, the telescopic rod body includes a gripping rod 100 and a plurality of rod units 200 that are slidably connected to the gripping rod 100 and are slidably sleeved in sequence. The top ends of the gripping rod 100 and the rod unit 200 are both provided with an upper end cap 110 that prevents adjacent rod units 200 from detaching. A locking member is also provided at the joint of the telescopic rod body. The gripping rod 100 and the rod unit 200 are both hollow rods. The hollow portions of the gripping rod 100 and the rod unit 200 constitute a receiving channel, leaving space for the conductive core 300 to be installed. The upper end cap 110 is buckled onto the top ends of the gripping rod 100 and the rod unit 200. The upper end cap 110 is roughly cylindrical. The inner diameter of the upper end cap 110 is roughly the same as the outer diameter of the target to be buckled. Preferably, it is interference fit with the target to be buckled, thereby making it difficult for the upper end cap 110 to fall off during use. The top end of the upper end cap 110 is provided with a radially inwardly extending retaining edge 111. The retaining edge 111 serves as a limiter to prevent the telescopic rod from becoming disjointed. In other words, when the upper end cap 110 is fastened to the gripping rod 100, the inner diameter of the upper end cap 110 is approximately the same as the outer diameter of the gripping rod 100. Furthermore, the upper end cap 110 is fastened to the gripping rod 100 using an interference fit. The inner diameter of the retaining edge 111 of the upper end cap 110 is slightly smaller than the inner diameter of the gripping rod 100, but slightly larger than the outer diameter of the rod unit 200 sliding in the gripping rod 100, allowing the rod unit 200 to slide out normally.

[0029] The number of rod units 200 can be determined according to actual needs. There can be three rod units 200, and the three rod units 200 are located in the outermost layer and slide into the gripping rod 100. The three rod units 200 can be extended and retracted independently. When all three rod units 200 are extended, the telescopic rod is in its longest state, and when all three rod units 200 are retracted, the telescopic rod is in its shortest state. In other words, the telescopic rod has a total of four sections, and correspondingly, the conductive core also includes four metal rods. On the entire telescopic rod, the diameter of each section on the telescopic rod gradually increases from top to bottom. In other words, the gripping rod has the largest diameter, and the rod unit at the top has the smallest diameter. The arrangement order of the conductive core is opposite to that of the telescopic rod. Specifically, the diameter of the metal rods in the conductive core 300 gradually decreases from top to bottom. The metal rod at the top has the largest diameter, and the metal rod connected to the gripping rod 100 has the smallest diameter.

[0030] In some embodiments, a locking member is disposed at the lower end of the rod unit 200. The locking member comprises a locking shaft 400 coaxially connected to the telescopic rod. The locking shaft 400 is circumferentially configured with a variable diameter arc 401. An expansion portion is sheathed around the locking shaft 400. The variable diameter arc 401 compresses the expansion portion as the rod unit 200 rotates, locking the telescopic rod. During telescoping, the locking member is in an unlocked state, allowing the corresponding rod unit 200 to freely extend and retract. When the desired length is reached, the locking member is locked. Specifically, the locking and unlocking states of the locking member are both achieved by rotating the rod unit 200. Driven by the rod unit 200, the contact point between the variable diameter arc 401 and the expansion portion changes. When the maximum diameter of the variable diameter arc 401 contacts the expansion portion, the locking member is locked. Conversely, when the minimum diameter of the variable diameter arc 401 contacts the expansion portion, the locking member is unlocked. This means that the expansion portion and the locking shaft 400 are movably connected, and the expansion portion does not rotate with the rotation of the locking shaft 400. Since the rod unit 200 is hollow, in order to facilitate the installation of the locking shaft 400 on the rod unit 200, a docking sleeve 410 is provided at the upper end of the locking shaft 400. The inner diameter of the docking sleeve 410 is substantially the same as the outer diameter of the rod unit 200, and the docking sleeve 410 is sleeved on the bottom end of the rod unit 200 using an interference fit. The outer diameter of the docking sleeve 410 is larger than the outer diameter of the rod unit 200 it is sleeved on, so the docking sleeve 410 also acts as a stop. In other words, the outer diameter of the docking sleeve 410 is larger than the inner diameter of the retaining edge 111 of the upper end cover 110. The position where the docking sleeve 410 and the retaining edge 111 of the upper end cover 110 contact is the maximum position at which a single rod unit 200 can be extended.

[0031] To unlock or lock, you need to hold two adjacent rod units 200, or the gripping rod 100 and the adjacent rod unit 200, with both hands. Hold the one with the larger outer diameter still, and rotate the sliding inner unit to unlock and lock. If the rod unit 200 is currently unlocked, simply stretch or retract it, and after moving it into position, rotate the sliding inner unit until it can no longer rotate. This completes the lock. To unlock, rotate the inner unit in the opposite direction until it can freely extend and retract, then stop rotating. Once it is fully extended and retracted, lock again.

[0032] In some embodiments, the expansion portion includes two docking action blocks 420, and the outside of the two action blocks 420 is coated with an elastic layer 430, and the length of the elastic layer 430 is consistent with that of the action blocks 420. A ridge 421 is provided on the inner side of the action block 420, which contacts the variable arc edge 401. When locked, the two action blocks 420 are pushed away from each other by the variable arc edge 401 to press the elastic layer 430 against the inner wall of the telescopic rod. The two action blocks 420 can enhance the locking force and balance. The two action blocks 420 are symmetrically fitted along the axial section, and the combination of the two action blocks 420 after fitting is cylindrical. The cylindrical action block 420 can better cover the elastic layer 430. The elastic layer 430 is preferably a rubber ring. In order to enhance friction, a plurality of annular grooves 431 are constructed from top to bottom on the outer circumference of the rubber ring.

[0033] In some embodiments, the variable diameter arc edge 401 has two sections, and the two sections of the variable diameter arc edge 401 are centrally symmetrically distributed along the axis of the locking shaft 400, and correspond one-to-one to the two action blocks 420. Specifically, the variable diameter arc edge 401 is a curve with a gradually changing diameter when viewed from the axial direction. Preferably, the maximum diameter of the variable diameter arc edge 401 is the inner diameter of the action block 420, and the variable diameter arc edge 401 gradually decreases from the maximum. The reduced diameter plus the thickness of the ridge 421 is the maximum diameter of the variable diameter arc edge 401. The variable diameter arc edge 401 forms a step 402 between the smallest point and the outer periphery of the locking shaft 400, so that the ridge 421 can be stuck at the smallest point of the variable diameter arc edge 401. Since the two sections of the variable diameter arc edge 401 are centrally symmetrically distributed, the two sections of the variable diameter arc edge 401 can simultaneously push the two action blocks 420 away from each other. That is, when one ridge 421 is at the minimum point of the corresponding variable-diameter arc 401, the other ridge 421 must also be at the minimum point of its corresponding variable-diameter arc 401, indicating the locking member is unlocked. In this unlocked state, the elastic layer 430 is not pressed against the corresponding gripping rod 100 or the inner wall of the rod unit 200, and the rod unit 200 corresponding to the locking member can freely extend and retract. To lock, the inner rod unit 200 is rotated, driving the locking shaft 400 (clockwise rotation in the figure indicates the locking direction). The diameter of the variable-diameter arc 401 corresponding to the ridge 421 gradually increases, causing the actuating block 420 to expand radially outward, squeezing the two sides of the rubber ring against the corresponding inner wall. The friction between the rubber ring and the inner wall is sufficiently great that the rod unit 200 cannot be further extended or retracted. The unlocking operation is the opposite. The rod body unit 200 is rotated so that the relative position of the ridge 421 and the variable diameter arc edge 401 returns to the position where the ridge 421 is located at the minimum diameter of the variable diameter arc edge 401. At this time, the rubber ring returns to a circular cross-section under the action of its elastic force. The rubber ring no longer presses against the inner side of the corresponding object (the gripping rod 100 or the adjacent outer rod body unit 200), and the unlocking is completed.

[0034] In some embodiments, the end of the telescopic rod body is also provided with an electroscope 500.

[0035] In some embodiments, the electroscope 500 and the conductive core 300 are also electrically connected through a resistor 600. The resistor 600 is a high resistance 600 in the electrical industry, which can reduce the current flowing through the conductive core 300, improve safety, or facilitate the connection of other equipment. The resistor 600 is in the shape of a cylinder, and a bakelite sleeve 610 is wrapped outside the resistor 600. The upper end of the bakelite sleeve 610 is screwed with a first copper stud 620, the first copper stud 620 is electrically connected to the resistor 600 and the electroscope 500, and the first copper stud 620 and the electroscope 500 are fixedly connected, providing adhesion for the upper end of the bakelite sleeve 610. The lower end of the bakelite sleeve 610 is screwed with a second copper stud 630, the second copper stud 630 is screwed and fixed to the conductive core 300 to provide adhesion for the lower end of the bakelite sleeve 610, and the second copper stud 630 is also electrically connected to the resistor 600 and the conductive core 300. In order to improve the stability of the electrical connection, a first spring 621 is arranged between the first copper stud 620 and the resistor 600.

[0036] In some embodiments, the bottom end of the holding rod 100 is provided with a lower end cover 120, and a navigation plug 121 is further arranged on the lower end cover 120, which is electrically connected to the conductive core 300. In operation, after the electroscope 500 on the telescopic rod body is electrically connected to the operating object, the navigation plug 121 realizes electrical connection with the operating object, and subsequent grounding can be achieved by connecting the ground wire through the navigation plug 121. The navigation plug 121 can also be connected to the required detection equipment, etc. The side wall of the lower end cover 120 is provided with a screw hole, and a through hole is arranged on the outer wall of the holding rod 100 corresponding to the position of the screw hole of the lower end cover 120, so that the lower end cover 120 can be fixed by a bolt.

[0037] In some embodiments, the bottom end of the conductive core 300 is provided with a fixing disc 310, the top end of the lower end cover 120 is provided with a groove accommodating the fixing disc 310, and the fixing disc 310 is fixed in the groove to fix the bottom end of the conductive core 300 to the lower end cover 120. A second spring 122 is arranged between the fixing disc 310 and the navigation plug 121. The outer side of the fixing disc 310 is configured with a plurality of screw holes, and a through hole corresponding to the plurality of screw holes of the fixing disc 310 is arranged on the outer periphery of the lower end cover 120, so that the fixing disc 310 can be fixed in the groove of the lower end cover 120 by a bolt.

[0038] In some embodiments, the top end of the conductive core 300 is provided with a connecting sleeve 320, the connecting sleeve 320 is fixed to the top end of the telescopic rod body, and the top of the connecting sleeve 320 is further provided with a fixing hole for connecting the resistor 600. The second copper stud 630 of the resistor 600 is screwed to the fixing hole.

[0039] In the description of this application, it should be understood that the terms used in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0040] In this application, unless otherwise specified or limited, the terms "connected," "connect," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0041] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems, and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An insulating telescopic rod, characterized in that: include: A telescopic rod body, wherein the telescopic rod body is provided with a receiving channel running through both ends thereof; A conductive core (300) is a telescopic structure, disposed in the accommodating channel, with two ends of the conductive core (300) respectively fixedly connected to two ends of the telescopic rod body, and the conductive core (300) is synchronously extended and retracted with the extension and retraction of the telescopic rod body.

2. The insulating telescopic rod according to claim 1, characterized in that: The telescopic rod body comprises a gripping rod (100) and a plurality of rod units (200) slidably connected to the gripping rod (100) and slidably sleeved in sequence. The top ends of the gripping rod (100) and the rod units (200) are both provided with upper end covers (110) for preventing adjacent rod units (200) therein from being separated. Locking members are also provided at the joints of the telescopic rod body.

3. The insulating telescopic rod according to claim 2, characterized in that: The locking member is arranged at the lower end of the rod unit (200), and the locking member comprises a locking shaft (400) coaxially connected to the telescopic rod, the locking shaft (400) is circumferentially structured with a variable diameter arc edge (401), and an expansion portion is sleeved on the outer circumference of the locking shaft (400), and the variable diameter arc edge (401) presses the expansion portion when rotating with the rod unit (200) to lock the telescopic rod.

4. The insulating telescopic rod according to claim 3, characterized in that: The expansion portion comprises two butted action blocks (420), the exteriors of the two action blocks (420) being coated with an elastic layer (430), and the interiors of the action blocks (420) being provided with ridges (421) in contact with the variable-diameter arc edge (401). When locked, the two action blocks (420) are pushed away from each other by the variable-diameter arc edge (401) to press the elastic layer (430) against the inner wall of the telescopic rod.

5. The insulating telescopic rod according to claim 4, characterized in that: The variable diameter arc edge (401) has two sections, and the two sections of the variable diameter arc edge (401) are centrally symmetrically distributed along the axis of the locking shaft (400) and correspond one-to-one to the two action blocks (420).

6. The insulating telescopic rod according to any one of claims 1 to 5, characterized in that: An electroscope (500) is also provided at the end of the telescopic rod.

7. The insulating telescopic rod according to claim 6, characterized in that: A resistor (600) is also conductively connected between the electroscope (500) and the conductive core (300).

8. The insulating telescopic rod according to claim 2 or 3, characterized in that: The bottom end of the gripping rod (100) is provided with a lower end cover (120), and the lower end cover (120) is further provided with an aviation plug (121), and the aviation plug (121) is electrically connected to the conductive core (300).

9. The insulating telescopic rod according to claim 8, characterized in that: A fixing plate (310) is provided at the bottom end of the conductive core (300), and a groove for accommodating the fixing plate (310) is provided at the top end of the lower end cover (120). The fixing plate (310) is fixed in the groove to fix the bottom end of the conductive core (300) to the lower end cover (120).

10. The insulating telescopic rod according to claim 7, characterized in that: A connecting sleeve (320) is provided at the top end of the conductive core (300), the connecting sleeve (320) is fixed to the top end of the telescopic rod body, and a fixing hole for connecting to the resistor (600) is also provided at the top of the connecting sleeve (320).

Images