KR200157811Y1 - Extention pipe of vacuum cleaner - Google Patents

Abstract

The present invention relates to an extension tube of a cleaner for cleaning by suction force of the driving means, there is no fear of contact failure when the third lead wire is fitted to the first extension means of the extension tube, of course, the third lead wire There is no fear that the first extension means may be burned by the heat generated at the lead terminal of the terminal connecting member to which the terminal is connected, while it may be burned by heat generated at the portion where the circular terminal of the terminal connecting member and the antenna of the power supply means are in close contact. There will be no.

The configuration of the present invention, the first extension means 200 is connected to the third lead wire of the suction port which can smoothly suck the dust in the room is connected to the power source, the suction hose for guiding the foreign matter to the main body and The second extension means 300, which can be connected to the connecting portion of the handle member connected, and the first and second extension means so that foreign matter sucked through the first extension means is moved to the suction hose through the second extension means. Both ends are fixed to the first and second extension means so that power can be supplied even when the length adjustment is made between the extension control means 400 and the first and second extension means, which are installed to enable mutual adjustment of the lengths. In the extension tube of the vacuum cleaner consisting of the power supply means 500, the first extension means 200, the first body pipe 210 in close contact with the suction port and the upper side of the first end of the first body pipe Upright compression Spring 220, the fastening button 230 is installed to be rotatably installed on the upper end of the first body pipe and is elastically supported by the compression spring, and the compression spring and the fastening button is escaped to be installed In addition, a lower terminal base 240 having a predetermined shape formed of an insulating material, and a terminal connection member 250 including a lead terminal, a wire, and a circular terminal, one end of which is seated on the lower terminal base and connected to the third lead wire. And an upper terminal base 260 fastened to an upper portion of the lower terminal base so that one end of the terminal connection member is seated, and the circular terminal of the terminal connection member and the antenna of the power supply means. The first fixing base 270 formed of an insulating material so that the fixing is fixed, and the screw for fixing the circular terminal of the terminal connecting member in close contact with the antenna ( 280) and a first body pipe which is installed to operate the fastening button installed in the first body pipe and is coupled to the first body pipe by a screw so that the compression spring and the terminal connection member are not exposed to the outside. The cover 290 has a structure.

Description

Cleaner tube

The present invention relates to a vacuum cleaner, and in particular, when the third lead wire is inserted into the first extension device of the extension pipe, there is no fear of contact failure, as well as occurring at the lead terminal of the terminal connection member to which the third lead wire is connected. The first extension device is not concerned with the combustion of the heat due to the heat, and the extension tube of the vacuum cleaner so that there is no fear of burning by the heat generated in the portion in which the circular terminal of the terminal connection member and the antenna of the power supply.

In general, the vacuum cleaner includes a main body (1) having a built-in suction motor and a dust pack and a power supply device for supplying power therein, and air containing dust so that dust is sucked into the dust pack of the main body (1). A suction hose (2) having one end connected to a handle member (3) formed at an end thereof to guide the flow and having a wire (4) connected inside the power supply device disposed at the end thereof; 2) a suction brush which is rotated by a driving motor to disperse the dust in the room through the 2) and scatters the dust is disposed inside, and the third lead wire 6 is disposed at one end thereof. (5) and guides the flow of air containing dust and foreign matter so that the air containing dust and foreign matter sucked through the suction inlet (5) flows to the suction hose (2) and the suction inlet (5). ) And the above handle Made of the extension pipe connected between the member (3).

Here, the extension pipe, the first extension device 200 is connected to the third lead wire 6 of the suction port (5) that can smoothly suck the dust in the room and the power is connected, and the foreign matter Through the second extension device 300 and the first extension device 200, which can be connected to the connection portion 4 of the handle member 3 connected to the suction hose (2) to guide (1) And an extension control device 400 installed to allow length adjustment of the first and second extension devices 200 and 300 so that the sucked foreign matter is moved to the suction hose 2 through the second extension device 300. In addition, both ends of the second extension device (200,300) is made of a power supply device 500 is fixed to the first and second extension devices (200,300) so that the power is supplied even when the power is made.

Here, the first extension device 200, the first body pipe 210 in close contact with the suction inlet 5 and the compression spring 220 erected vertically on the upper end of one side of the first body pipe 210. And a fastening button 230 installed to be rotatably installed on one side end of the first body pipe 210 and elastically supported by the compression spring 220, and the power supply device 500. Screw 280 for fixing the antenna 510 to be described later, the compression spring 220, the fastening button 230 and the screw 280 is not screwed to the first body pipe 210 so as not to be exposed to the outside ( 281 is coupled with the first body pipe cover 290 having a projection 291 protruding downward.

The first body pipe 210, the locking button seating portion 211, the locking button 230 is seated rotatably seated, and the projection 291 of the first body pipe cover 290 is fitted into each corner A body 218 having a hole 217, a projection 218a through which the third lead wire 6 is inserted and connected to the antenna 510 of the power supply device 500, and the first body pipe The antenna 510 is interposed between the screw fastening portion 219a fastened to the screw 281 fitted to the cover 290 and between the square hole 217 and the screw fastening portion 219. The antenna mounting portion 219b protrudes to be fixed.

The second extension device 300 includes a second body pipe 310 inserted into and connected to the connecting portion 4 of the handle member 3, and a power supply device 500 accommodated in the second body pipe 310. The second body pipe cover 350 and the inner circumference of the antenna body 510 and the lead terminal 540 are coupled to the second body pipe 310 via a screw 360 so that most of the antenna 510 and the lead terminal 540 are not exposed to the outside. A well-known length adjusting device (not shown) is provided to adjust the extension length of the extension adjusting device 400.

Here, as shown in FIG. 2, the second body pipe 310 has a terminal seat in which the lead terminal 540 fixed to the end of the antenna 510 of the power supply device 500 is not moved in the longitudinal direction. The fastening hook portion 316 is provided at both ends in the longitudinal direction such that the portion 314 and the second body pipe cover 350 are fastened to the second body pipe 310.

In addition, the extension control device 400, while being fitted into the interior of the second body pipe 310, the tip is inserted into the interior of the first body pipe 210 to be fixed by the first body pipe cover 290 The formed quadrangular through hole 421 and a plurality of length adjusting grooves 423 formed along the longitudinal direction in a sawtooth shape downward of the quadrangular through hole 421.

The power supply device 500, the predetermined position is fixed to the antenna seat 219b via the screw 280 so that one end is in close contact with the protrusion 218a of the first body pipe 210 and can be stretched. While the multi-stage antenna 510 and the other end of the antenna 510 is fixed to the other end of the antenna 510 and the lead seating portion 314 is fixed so as not to move in the axial direction while the front end is the handle member It consists of a lead terminal 540 which can be inserted and connected to the connection part 4 of (3).

Therefore, the fastening button seating portion 211 so that the fastening button 230 is elastically rotated by the compression spring 220 that is erected vertically to the front end of the first body pipe 210 constituting the first extension device 200. After seating on, the antenna 510 of the power supply device 500 is fixed to the antenna seat 219b with a screw 280 as a medium.

Thereafter, the projection 291 protruding from the lower portion of the first body pipe cover 290 is pushed into the space between the antenna 510 and the antenna 510 to form a quadrangular hole 217 formed through the first body pipe 210. Insert the screw 281 in the upper portion of the first body pipe cover 290 by inserting the screw 281 into the quadruple through hole 421 of the extension adjusting device 400 and fastening the screw body 219a to the first body pipe. The first body pipe cover 290 is fastened to the upper portion of the 210.

At this time, the fastening button 230 may be partially protruded into the first body pipe cover 290 to be manipulated.

In addition, the other end of the extension adjusting device 400 is pushed into the second body pipe 310 so that the length adjusting groove 423 is sequentially caught by the length adjusting device installed inside the second body pipe 310. Enter to accommodate a certain length.

Thereafter, the lead terminal 540 fixed to the antenna 510 of the power supply device 500 rests on the lead seating portion 314 to be seated thereon, and then the second body pipe cover is seated on the fastening hook portion 316. The pressure 350 is fixed by pressing.

Thereafter, when the second body pipe 310 is exerted in a direction stretching and contracting with respect to the first body pipe 210, the extension control device 400 is moved out of the second body pipe 310 and moved. The length of the extension tube is stretched while the length adjusting groove 423 of the extension adjusting device 400 is caught by the length adjusting device 115.

At this time, the antenna 510 of the power supply device 500 is extended to the lead terminal 540 while being stretched in the antenna type in accordance with the overall length change of the extension tube.

That is, the distance between the handle member 3 and the suction port 5 may be changed by the first and second extension devices at all times regardless of whether the place to be cleaned during the indoor cleaning is near or far from the user. By doing so, the user can more easily perform the cleaning function.

However, when the third lead wire 6 of the suction port 5 is inserted and connected to the center of the antenna 510 of the power supply field 500 in close contact with the protrusion 218a of the first extension device 200. The tip of the third lead wire 6 is not reliably connected inside the antenna 510, resulting in a defect in contact.

In addition, there is a problem that the first extension device is burned by heat at the place where the third lead wire is connected.

The present invention is devised to solve the above-described drawbacks, and there is no fear of contact failure when the third lead wire is fitted to the first extension device of the extension tube, as well as the terminal connection to which the third lead wire is connected. The first extension device does not have to be burned by the heat generated at the lead terminal of the member, while the cleaner does not have to be burned by the heat generated at the portion where the circular terminal of the terminal connection member and the antenna of the power supply device are in close contact with each other. The purpose is to provide an extension tube.

1 is an exploded perspective view showing a disassembled cleaner to which one example of a conventional extension tube is applied.

Figure 2 is an exploded perspective view showing a disassembled state of the extension of the conventional tube according to the first example.

3 is an exploded perspective view of the extension tube according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a partial perspective view showing the main portion of the extension pipe according to the present invention.

* Explanation of symbols for main parts of the drawings

1: main body 2: suction hose

3: handle member 4: connection part

5: suction port 6: third lead wire

200: first extension device 210: first body pipe

220: compression spring 230: fastening button

240: bottom terminal bottom member 250: terminal connection member

251: Lead terminal 252: Wire

253: circular terminal 260: upper terminal bottom member

270: first fixed bottom member 280: screw

281: screw 290: the first body pipe cover

300: second extension device 310: second body pipe

350: second body pipe cover 360: screw

400: extension control device 500: power supply device

510: antenna

The present invention for achieving the above object, the first extension device which is connected to the third lead wire of the suction port to be able to suck the dust in the room smoothly connected to the power source, and guides the foreign matter to the main body A second extension device adapted to be connected to a connection part of the handle member connected to the suction hose, and first and second extension devices so that foreign matter sucked through the first extension device is moved to the suction hose through the second extension device; Extension control device installed so as to control the length of each other, and both ends are fixed to the first and second extension device so that power can be supplied even when the length adjustment is made between the first and second extension devices In the extension tube of the vacuum cleaner comprising a device, the first extension device, the first body pipe which is in close contact with the suction inlet and the upper surface of the first end of the first body pipe A shaft spring, a fastening button installed to be rotatably installed on one side end of the first body pipe and being elastically supported by the compression spring, and the compression spring and the fastening button are escaped to be installed and formed of an insulating material. A lower terminal bottom member having a predetermined shape, a terminal connecting member comprising a lead terminal, a wire and a circular terminal, one end of which is seated on the lower terminal bottom member and connected to the third lead wire, and an upper portion of the lower terminal bottom member. The upper terminal bottom member to which one end of the terminal connection member is seated, the screw for fixing the terminal of the terminal connection member in close contact with the antenna, and the fastening button installed in the first body pipe. The first body pie is installed so that the compression spring and the terminal connection member are not exposed to the outside. A screw coupled to the mediator is characterized in that the pipe cover consisting of a first body.

Hereinafter, an embodiment of a cleaner according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view of the extension tube according to the present invention, Figure 4 is a cross-sectional view taken along line AA of Figure 3, Figure 5 is a partial perspective view showing the main portion of the extension pipe according to the present invention, Figure 1 and The same reference numerals are attached to the same parts as those in FIG. 2, and description thereof is omitted.

Extension tube according to the present invention is connected to the third lead wire (6) of the suction port (5) so as to smoothly suck the dust in the room, the first extension device 200 and the power connected to the main body and the foreign matter Through the second extension device 300 and the first extension device 200, which can be connected to the connection portion 4 of the handle member 3 connected to the suction hose (2) to guide (1) And an extension control device 400 installed to allow length adjustment of the first and second extension devices 200 and 300 so that the sucked foreign matter is moved to the suction hose 2 through the second extension device 300. In addition, both ends of the second extension device (200,300) is made of a power supply device 500 is fixed to the first and second extension devices (200,300) so that the power is supplied even when the power is made.

The first extension device 200, the first body pipe 210 in close contact with the suction inlet 5, and the compression spring 220 erected vertically on the upper end of one side of the first body pipe (210) And, the fastening button 230 is installed so as to be rotatable on the upper end of one side of the first body pipe 210 and is elastically supported by the compression spring 220, the compression spring 220 and the fastening button The lower terminal bottom member 240 of a predetermined shape formed of an insulating material and the lower terminal bottom member 240 formed of an insulating material are evacuated so that the third lead wire 6 and the third lead wire 6 are installed. A terminal connection member 250 formed of a lead terminal 251, a wire 252, and a circular terminal 253, one end of which is seated on the lower terminal bottom member 240 to be connected to the third lead wire 6; Even if one end of the terminal connecting member 250 is seated by being fastened to the upper portion of the lower terminal bottom member 240 The upper terminal bottom member 260 and the first body pipe 210 are seated on the lock, and the other end of the terminal connecting member 250 and the antenna 510 of the power supply device 500 are fixed with an insulating material. The first fixed bottom member 270, a screw 280 for fixing the other end of the terminal connecting member 250 to the first fixed bottom member 270, and the first body pipe 210 The compression spring 220 and the lower / upper terminal bottom members 240 and 260 and the terminal connection member 250 and the first fixed bottom member 270 are installed to operate the fastening button 230 installed to the outside. The first body pipe cover 290 is provided with a protrusion 291 coupled to the first body pipe 210 via a screw 281 so as not to be exposed.

The first body pipe 210 may include a fastening button seating portion 211 in which the fastening button 230 is rotatably seated, and a bottom member seating portion 212 in which the lower terminal bottom member 240 is seated. A bottom member seating portion 212 on which the first fixed bottom member 270 is seated; a fixed bottom member seating portion 213 on which the first fixed bottom member 270 is seated; and the terminal connecting member 250. Wire 252 is inserted into the wire seating portion 214, the antenna cover seating portion 215, one end of the antenna cover 520 is seated and the first sealing member 410 is fitted A quadrangular member formed between a sealing member seating part 216 and the fixed bottom member seating part 213 and the antenna cover seating part 215, into which the protrusion 291 of the first body pipe cover 290 is fitted. The terminal connecting member accommodated in the lower terminal bottom member 240 by inserting the hole 217 and the respective seating portions and having the third lead wire 6 inserted thereinto ( It consists of a body 218 having a projection 218a and a rotation preventing projection 218b to be connected to the lead terminal 251 of 250.

The second extension device 300 is seated at a predetermined position on the upper surface of the first body pipe 310 and the second body pipe 310 which is inserted into and connected to the connecting portion 4 of the handle member 3. In addition, the second fixed bottom member 320 formed of an insulating material so that the antenna 510 of the power supply device 500 is fixed, and the antenna 510 is disposed above the second fixed bottom member 320. A lead wire 330 composed of a circular terminal 331 raised to be in close contact with the state, a lead terminal 333 connected to the wire 332 and the connecting portion 4 of the handle member 3, and the lead wire 330. ) And a screw nail 340 fastened to the end of the antenna 510 to the second fixed bottom member 320, and a second fixed bottom member 320 and a lead wire accommodated in the second body pipe 310. A second body pipe cover 350 coupled to the second body pipe 310 so that most of the 330 is not exposed to the outside, and the second body It consists of a pipe cover 350 with screws 360 for fastening the second pipe body (310).

Here, the second body pipe 310 may include a reinforcing grate portion 311 into which the power supply device 500 is fitted, and a fixed bottom member seating portion 312 on which the second fixed bottom member 320 is seated. A wire seating portion 313 to which the wire 332 of the lead wire 330 is fitted, a terminal seating portion 314 to which the lead terminal 333 of the lead wire 330 is seated, and the second Two pairs of fastening hook portions 316 formed to face the opposite ends of the body pipe cover 350 to be fastened to the second body pipe 310 and the rotation preventing protrusion 422 of the extension pipe 420 to be described later. The pair of anti-rotation grooves 317 formed on the inner circumferential surface of the place where a predetermined length is entered from the tip of the side where the reinforcement extremity 311 is formed, and the lower portion of the reinforcement extremity 311 and the anti-rotation groove 317 are formed. The lower inclined protrusion 431 of the pipe fixing housing 430, which will be described later, is inserted into a hole having a diameter larger than the diameter and fastened. It consists of a housing fixing part 318 formed to be.

In addition, the extension control device 400 is coupled to the end of the first body pipe 210 and the first sealing member 410 is installed so as to seal, and fitted into the first body pipe 310, An extension pipe 420 whose tip is inserted into the first body pipe 210 and fixed by the first body pipe cover 290, and the second body pipe 310 is fitted to the extension pipe 420. Pipe fixing housing 430 which is inserted into the inside of the pipe and seated to guide the extension pipe 420, and is fitted to the rear end of the pipe fixing housing 430 to prevent the air from leaking to the place where it is in contact with the extension pipe 420. The separation preventing ring 450 is inserted into the second sealing member 440 and the extension pipe 420 so that the extension pipe 420 does not fall out by the pipe fixing housing 430 and the second sealing member 440. And, C-shaped soup seated on the middle portion of the outer peripheral surface of the pipe fixing housing 430 460, a roller seating member 470 in close contact with the pipe fixing housing 430 by the C-shaped spring 460, and a cylindrical roller 480 seated and positioned by the roller seating member 470. And a hook 491 for stretching the length of the extension pipe 420 by being inserted into the lower end of the first body pipe 310 to be engaged with the roller seating member 470 before and after. The knob 490.

The extension pipe 420 is cocked at a predetermined angle to the opposite end of the quadruple through hole 421 into which the projection 291 of the first body pipe cover 290 is fitted. A pair of anti-rotation protrusions 422, a plurality of length adjusting grooves 423 formed along the longitudinal direction in the form of a serrated downward of the quadruple through hole 421, and the rotation of the first body pipe 210 It has a structure with a rotation preventing groove 424 formed to fit to the prevention projection (128b).

The power supply device 500 is a multi-stage antenna 510 which is fixed to both ends of the first and second fixed bottom members (270,320) and is extensible as well as the power supply, and the antenna 510 An antenna cover 520 fixed to the first body pipe 210 and fitted to prevent electric shock, and a screw fastened to fix the antenna cover 520 to the first body pipe 210. It consists of 530.

Hereinafter will be described the assembly and operation according to the configuration of the present invention.

The fastening button 230 is elastically rotated by the compression spring 220 which is erected vertically at the distal end of the first body pipe 210 constituting the first extension device 200. After seating, the lead terminal 251 of the pair of terminal connecting members 250 to which the third lead wire 6 is reliably connected to the lower terminal bottom member 240 formed of an insulating material is also formed into an insulating material. When the upper terminal bottom member 260 is fixed, the combustion is prevented by the heat generated from the lead terminal 251.

In addition, the bottom member seating portion 212 of the first body pipe 210 must be seated so as not to interfere with the fastening button 230 so that it can be easily separated from the suction port 5.

Thereafter, the circular terminal 253, which is the other end of the terminal connection member 250, is connected to the first fixed bottom member 270 together with the tip of the antenna 510 constituting the power supply device 500 through the screw 280. After fixing, the first fixed bottom member 270 is seated on the fixed bottom member seating portion 213 of the first body pipe 210 and the wire 252 portion of the terminal connection member 250 is first mounted. It is fixed to the wire seating portion 214 of the body pipe 210.

Next, the antenna cover 520 is inserted into the pair of antennas 510 and fixed to the antenna cover seating part 215 of the first body pipe 210 through the screw 530.

In addition, after the first sealing member 410 is coupled to the sealing member seating portion 216 formed at the rear end of the first body pipe 210, the tip of the extension pipe 420 is fitted to the release preventing ring 450 and In addition, the first sealing member 410 passes through the pipe fixing housing 430 in which the second sealing member 440, the C-shaped spring 460, the roller seating member 470, and the roller 480 are installed. It is inserted into the installed first body pipe 210 to a predetermined depth.

Thereafter, the quadruple hole 217 and the tetragonal through hole 421 of the extension pipe 420 are formed to penetrate the protrusion 291 protruding from the lower portion of the first body pipe cover 290 to the first body pipe 210. In addition to the fitting on the screw 281 is fastened to the body 218 via a medium.

Next, the anti-rotation protrusion 422 cocked at the rear of the extension pipe 420 is inserted in accordance with the second body pipe 310, and the pipe fixing housing 430 fitted to the extension pipe 420 is inserted into the second body. It is inserted and fixed to coincide with the tip of the pipe 310.

After that, the hook portion 491 of the bidirectional manipulation knob 490 inserted from the lower portion of the second body pipe 310 is inserted into the second body pipe 310 to be seated on the roller seating member 470 to be seated. The member 470 can be moved back and forth.

In addition, by inserting the antenna 510 and the antenna cover 520 of the power supply device 500 through the reinforcement portion 311 of the second body pipe 310 and the screw 340 as a medium. After fixing to the second fixed bottom member 320 to be in close contact with the pair of lead wires 330, the second fixed bottom member 320 is seated on the fixed bottom member seating portion 312.

Thereafter, the wire 332 and the lead terminal 333 of the lead wire 330 are seated on the wire seating portion 313 and the terminal seating portion 314 of the second body pipe 310 and then the second body pipe. The cover 350 is fixed to the fastening hook portion 316 so that the power supply device 500, the lead wire 330, and the second fixed bottom member 320 are not exposed to the outside.

Thereafter, when the roller 480 is seated on the escape portion of the roller seating member 470 by pushing the bidirectional manipulation knob 490 forward and backward, it is separated from the length adjusting groove 423 of the extension pipe 420 to extend the pipe. As the 420 is moved out of the second body pipe 310 and enters to be moved, the entire length of the extension pipe is stretchable.

At this time, the antenna 510 of the power supply device 500 is stretched in the antenna type according to the change in the overall length of the extension tube is to be energized from the terminal connecting member 250 to the lead wire 330.

In addition, the antenna cover 520 can prevent the safety accident by reducing the electric shock due to the back of the user's hand is in contact with the antenna 510 when the length of the extension tube is increased.

As described above, according to the present invention, the terminal connecting member is installed to supply power to the third lead wire through a screw in the antenna of the power supply device, and the lead terminal of the terminal connecting member is formed of an insulating material with a circular terminal. The upper / lower terminal bottom member and the first fixed bottom member are installed as a medium, so that there is no fear of contact failure when the third lead wire is inserted into the first extension device of the extension tube, and the third lead wire is While the first extension device may not be burned by the heat generated at the lead terminal of the terminal connection member to be connected, it may be burned by heat generated at a portion where the circular terminal of the terminal connection member and the antenna of the power supply device are in close contact with each other. There is no effect.

Although one specific embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and those skilled in the art may make various changes and modifications based on the technical idea of the present invention.

Claims (1)

A first extension device connected to a third lead wire of a suction port which can smoothly suck dust in the room, and a power supply connected thereto, and a connection part of the handle member connected to a suction hose for guiding foreign substances to the main body. Extension device for adjusting the length of the second extension device and the first and second extension device so that the foreign matter sucked through the first extension device is moved to the suction hose through the second extension device to be able to be adjusted. And, in the extension tube of the cleaner consisting of a power supply device is fixed to the first and the second extension device so that the power is energized even when the length adjustment is made between the first and second extension device, the first An extension device includes: a first body pipe in close contact with the suction inlet, a compression spring erected vertically on an upper end of one side of the first body pipe, and one side end of the first body pipe. A fastening button installed to be rotatably installed and elastically supported by the compression spring, and a lower terminal bottom member of a predetermined shape formed of an insulating material and escaped to be installed to the compression spring and the fastening button, and the bottom terminal bottom. A terminal connection member having one end seated on the member and connected to the third lead wire, a terminal connection member consisting of a wire and a circular terminal, and an upper terminal fastened to an upper portion of the lower terminal bottom member to allow one end of the terminal connection member to be seated thereon; The first fixed bottom member and the circular terminal of the terminal connecting member are formed of an insulating material so as to be seated on the bottom member, the first body pipe and to secure the circular terminal of the terminal connecting member and the antenna of the power supply device. And screw for fixing in close contact with the fastening button installed in the first body pipe And a first body pipe cover coupled to the first body pipe by a screw so that the compression spring and the terminal connection member are not exposed to the outside.