KR100962730B1 - A Hose Connecting Device of Centralized Type Vacuum Suction System - Google Patents

Abstract

Provides a hose connection for a centralized vacuum suction system.

The present invention provides a device for connecting between the suction port and the flexible hose provided at the end of the suction pipe extending from the central dust collecting device, comprising a connection pipe coupled to the suction port, the depression portion for externally exposing the tip of the connection pipe A rear frame provided; A cover rotatably assembled to a hinge portion provided in the recess to open and close the connecting pipe; a front frame having a predetermined size opening for exposing the cover to the rear frame and assembled to the rear frame; An adapter outer tube having an elastic part elastically fastened to the rear frame while the cover is rotated in an opening direction at a front end facing the cover and inserted into the recess through the opening; And an adapter inner tube connected to an end of the flexible hose and assembled in the adapter outer tube.

According to the present invention, the user can easily and quickly perform the operation of connecting the adapter with the suction port even with one hand during the cleaning operation can improve the convenience in use.

Centralized, Vacuum Suction, Flexible Hose, Adapter, Frame, Cover, Terminal

Description

Hose Connecting Device of Centralized Type Vacuum Suction System

The present invention relates to a hose connection device provided in the centralized vacuum suction system, and more particularly, the user can easily and quickly connect the adapter to the suction port even with one hand during the cleaning operation to improve convenience in use. It relates to a hose connecting device of a centralized vacuum suction system which has been improved to be possible.

In general, the centralized vacuum suction system is provided in apartments, offices, hospitals, and hotels where people live or work for 24 hours to provide strong suction power to each unit space, and thereby use dust and foreign substances on the bottom of the unit space. It is equipped with a suction structure to force the suction to the central dust collector to provide a cleaner living environment.

In this centralized vacuum suction system, as shown in FIG. 7, a central dust collector 10 is installed at any part of a building, and the suction force generated by the central dust collector 10 when power is applied to each unit space portion. To provide, the suction port 30 provided at the end of the suction pipe 20 extends to the bottom 1 or the wall 2 of the space, respectively.

The suction port 30 is coupled to the adapter 42 connected to one end of the flexible hose 41 via the suction inlet 50, and thus is transferred to the inhaler 40 provided at the other end of the flexible hose 41. As a suction force, the bottom surface of each space is cleaned.

However, as shown in FIG. 8, the suction inlet 50 has a bracket 51 having a connecting pipe 52 connected to the suction port 30 extending to the wall 2, and the bracket 51. Since the upper end of the cover 53 is rotatably assembled via a spring member (not shown), the user opens the cover 53 to expose the front surface of the bracket 51 during cleaning. The adapter 42 was inserted to form a suction line.

In addition, the Republic of Korea Registered Utility Model Publication No. 20-0426922 (2006.9.13. Registration date) is composed of a cover formed with a handle, a head formed with a support jaw and a body formed integrally with the lower side of the suction valve is coupled to the inlet As disclosed, such a suction valve, the user opens the cover to clean the outside of the suction hole of the main body, and then inserts the adapter 42 to configure the suction line.

However, in order to connect the adapter with the suction inlet or the suction valve, the conventional user grasps the lower end of the cover 53 with one hand, rotates it, and opens it, and then installs the adapter 42 with the other hand of the user. ) Must be inserted into the connection pipe 52 of the bracket 51 or the suction hole of the main body, the user has to use both hands when using the vacuum cleaner, which is very inconvenient in use and adds to the burden on the user.

In addition, when the adapter 42 is removed after use of the cleaner, the cover is closed to seal the bracket and the main body by the elastic force of the built-in restoring spring member. And bumping each other with excessive impact force, and the components made of resin are damaged and damaged, and must be replaced by the loss of its function when broken, thereby lowering the reliability of the product.

In addition, the electrical connection structure for the electrical connection between the signal line provided in the flexible hose 41 and the central dust collector 10 is unstable and complicated, resulting in poor connection, and acted as a main cause of increase in manufacturing cost.

In addition, it is difficult to change the size of the suction inlet in accordance with various installation conditions of the wall or the floor, which is the construction area provided with the suction port 30, there was a problem that the construction period required to install the suction inlet is long.

Therefore, the present invention is to solve the above problems, the purpose of the user can easily and quickly perform the task of connecting the adapter to the suction port even with one hand during the cleaning operation to improve the convenience in use To provide a hose connecting device of a centralized vacuum cleaner.

Another object of the present invention is to provide a hose connecting device of the centralized vacuum suction system that can prevent the component from being damaged by the external force generated when the adapter is attached and detached.

It is another object of the present invention to provide a hose connecting device of a centralized vacuum suction system that can realize more stable and reliable electrical connection with the central dust collecting device when the adapter is coupled.

Another object of the present invention is to provide a hose connecting device of the centralized vacuum suction system that can elastically adjust the shape of the frame assembly according to various installation conditions of the wall or the floor is provided with the suction port.

As a specific means for achieving the above object, the present invention is a device for connecting between the suction port and the flexible hose provided at the end of the suction pipe extending from the central dust collecting device, having a connection pipe coupled to the suction port A rear frame having a recess for exposing the front end of the connecting pipe to the outside; A cover rotatably assembled to a hinge portion provided in the recess to open and close the connecting pipe; a front frame having a predetermined size opening for exposing the cover to the outside and assembled to the rear frame; An adapter outer tube having an elastic part elastically fastened to the rear frame while the cover is rotated in an opening direction at a front end facing the cover and inserted into the recess through the opening; And an adapter inner tube connected to an end of the flexible hose and assembled in the adapter outer tube. The hose connecting device of the centralized vacuum suction system is provided.

Preferably, the connecting tube includes a small diameter portion disposed in the depression, and a large diameter portion coupled to the suction port.

Preferably, the rear frame has a first locking hole in which left and right sides of the recessed part are inserted with a first elastic piece extending a predetermined length from the rear surface of the front frame, and the locking jaw formed at the front end of the first elastic piece is fixed. .

Preferably, the rear frame is provided on any one of a floor or a wall on which the suction port is installed.

Preferably, the rear frame has any one of upper and lower cutting lines on the rear surface.

Preferably, the recess further includes a pair of left and right first terminal parts electrically connected to the central dust collector on a rear surface thereof, the first terminal part being a boss integrally provided with the recessed part, and a screw fastened to the boss. A member and a terminal pin inserted into the boss and exposed to the inner circumferential surface of the connecting pipe and a spring member provided between the screw member and the terminal pin to elastically support the terminal pin.

Preferably, the cover has a left and right wings protruding rearward from the left and right upper sides, the left and right wings are provided with hinge pins rotatably assembled in the hinge hole formed in the hinge portion.

Preferably, the cover has a circular ring having an inner diameter size that is relatively larger than the outer diameter of the connector tube tip.

Preferably, the cover further includes an elastic body having a fixed end fixed to the fitting jaw formed on the outer surface of the front end of the connecting tube, extending a predetermined length from the fixed end and having a free end contacting the upper end of the cover. do.

Preferably, the elastic portion includes a second elastic piece provided between the pair of cutouts formed on the outer surface of the adapter outer tube, the second elastic piece is elastically in the second engaging hole formed in the recessed portion at the tip It is provided with a locking jaw to be inserted.

More preferably, the second elastic piece has a pressing member which protrudes at a rear end and is inserted into the second locking hole to release the locking of the locking jaw.

Preferably, the adapter outer tube further includes a second terminal portion electrically connected to a signal line provided in the flexible hose, wherein the second terminal portion is a pair of left and right arrangements recessed on a lower outer surface of the adapter outer tube. It is disposed in, and comprises a terminal plate protruding to form a fixing jaw is inserted into the fixing hole formed in the mounting portion on the top.

Preferably, the adapter inner tube includes a front body having an incision cut in an arc at the front end facing the connecting tube, and a rear body protruding the engaging jaw coupled to the end of the flexible hose on the outer surface. .

More preferably, between the front body and the rear body is provided with a projection that is caught on the step formed on the inner surface of the adapter outer tube.

According to the present invention, when the cleaner is used, the user can easily and quickly couple to the frame assembly provided on the floor or the wall while the adapter assembly is attached by one hand to perform the operation of connecting with the suction port, thereby improving convenience in use. It can reduce the workload of the user.

In addition, since the closing of the connection pipe connected to the suction port after the cleaning operation is naturally performed by the self-weight or elastic force of the cover released from the restraining force, it is possible to prevent the component from being damaged by excessive external force as much as possible. Can be.

Further, when the adapter assembly and the frame assembly are coupled, electrical connection is made between the first terminal portion provided in the rear frame and the second terminal portion of the adapter outer tube, so that the electrical connection with the central dust collector is more stable and reliable without a connection failure. Can be implemented to improve the reliability of the product.

In addition, by changing the size of the rear frame provided on the wall or floor according to various installation conditions of the wall or floor provided with the suction port, it is possible to shorten the time required to construct the frame assembly to increase the work productivity. Effect is obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a hose connection device of the centralized vacuum suction system according to a preferred embodiment of the present invention, Figure 2 is a hose connection device of the centralized vacuum suction system according to a preferred embodiment of the present invention 3 is a perspective view showing a cover employed in the hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention, and FIG. 4 is a centralized vacuum suction system according to a preferred embodiment of the present invention. Figure 5 is a longitudinal cross-sectional view showing a hose connection device of Figure 5 is a state diagram of the hose connection device of the centralized vacuum suction system according to a preferred embodiment of the present invention is separated, Figure 6 is a centralized type according to a preferred embodiment of the present invention This is a state diagram in which the hose connecting device of the vacuum suction system is combined.

Hose connecting device 100 according to a preferred embodiment of the present invention is a flexible hose having an inlet and an inlet of the suction pipe extending from the central dust collector installed in any part of the building to the wall or floor of the building and The user can easily and quickly connect with one hand to perform the vacuum cleaning operation, which is the rear frame 110, the cover 120, the front frame 130, the adapter outer tube 140 and the adapter Inner tube 150 is included.

1 and 2 and 4, the rear frame 110 is a rectangular plate-like structure integrally provided with a connection pipe 111 coupled to the suction port corresponding to the end of the suction pipe.

The rear frame 110 is provided with a recess 112 formed in a predetermined depth so as to expose the front end of the connecting pipe 111 to the outside, the upper and lower parts of the recess 112, the bottom body (1) or a fastening hole 113 to which the fastening member is fastened so as to be easily assembled and fixed to the wall 2.

Accordingly, the rear frame 110 may be selectively fixed to the bottom body 1 or the wall 2 according to the position where the suction port 30 is installed and disposed.

The connecting pipe 111 integrally provided in the central region of the rear frame 110 may include a small diameter portion 111a disposed in the recess 112 and a large diameter portion 111b coupled to the suction port 30. It includes, the large diameter portion (111b) extends a predetermined length from the rear of the recessed portion 112 to the rear. Accordingly, the tip of the suction port 30 inserted into the large diameter portion 111b is caught by the stepped portion 111c formed in the boundary region between the small diameter portion 111a and the large diameter portion 111b.

In addition, the left and right sides of the recess 112, the first elastic piece 134a, 134b extending a predetermined length from the rear of the front frame 130 is inserted into the front end of the first elastic piece (134a, 134b) It has a first locking hole (114a, 114b) is fixed to the locking jaw is formed protruding, the locking jaw is projected toward the connecting pipe 111 side and separated after completion of insertion from the first locking hole (114a, 114b) Do not let go.

The upper and lower cutting lines may be easily and elastically adjusted on the rear surface of the rear frame 110 so that the upper and lower forming heights of the rear frame 110 can be adjusted easily and elastically according to the size of the position where the suction port 30 is installed and disposed. At least one of (C1, C2) is provided.

Accordingly, by cutting and removing the upper or lower body of the rear frame 110 along the incision line (C1, C2) it is possible to easily reduce the size of the rear frame 110 according to the construction conditions of the wall or floor. .

Meanwhile, a rear side of the recess 112 includes a pair of left and right first terminal portions 115 to which signal lines electrically connected to the central dust collector are connected, and the first terminal portion 115 is the recess 112. ) The terminal 115 is provided integrally, the screw member 115b fastened to the boss (115a), and the terminal pin is inserted into the boss (115a) and the tip is exposed to the inner peripheral surface of the connector (111) 115d and a spring member 115c provided between the screw member 115b and the terminal pin 115d to elastically support the terminal pin 115d.

Accordingly, by connecting the signal line to the screw member 115b, the terminal pin 115d may be electrically connected to the central dust collector 10.

1 and 3 and 4, the cover 120 is rotatably assembled to the hinge portion 118 provided in the recess 112 of the rear frame 110, the connector ( 111) to open or close the tip.

The cover 120 has left and right wings 124 protruding rearward from the upper left and right sides, and the left and right wings 124 are rotatably assembled in the hinge hole 118a formed in the hinge portion 118. The hinge pin 122 is provided. Accordingly, the cover 120 is to be rotated around the hinge hole (118a) to open or close the front end of the connecting pipe 111.

The cover 120 has a circular ring 125 having an inner diameter size that is larger than the outer diameter of the distal end of the connecting tube 111 to completely cover the front end of the connecting tube 111 on the rear surface.

Here, the cover 120 has a fixed end 127a, one end of which is fixed to the fitting jaw 126 protruding from the front end outer surface of the connecting pipe 111, and extends a predetermined length horizontally from the fixed end 127a. It is preferable to include an elastic body 127 having a free end (127b) is the other end is bent in a substantially perpendicular direction and in contact with the top of the cover.

Accordingly, the fixed end 127a of the elastic body 127 is fixed to the fitting jaw 126, and the free end 127b of the elastic body 127 is close to the hinge pin of the cover 120. By maintaining the contact state, the free end (127b) in contact with the end of the cover 120 is switched to the horizontal state when the adapter outer tube 140 is inserted is bent toward the fitting jaw 126 to generate an elastic restoring force.

Here, the elastic body 127 is illustrated and described as being provided with a leaf spring, but is not limited thereto, and a fixed end is fitted into the fitting jaw 126 to be fixed and a free end is provided as a coil spring in contact with the cover 120. May be

On the other hand, when the adapter outer tube 140 is separated, the cover 120 is converted to a vertical state by the elastic restoring force of the elastic body 127 to close the tip inlet of the connecting pipe 111.

Here, the cover 120 is shown and described as being closed by the elastic restoring force of the elastic body 127, but is not limited thereto, and the cover 120 opened when the adapter outer tube 140 is inserted into the adapter outer tube. When the 140 is separated, it may be naturally closed by its own weight.

1 and 2 and 4, the front frame 130 is a frame structure assembled to the front of the rear frame 110, the rear frame (in the central region of the front frame 130) Through the opening 132 of a predetermined size through which the cover 120 assembled to the outside 110 is exposed.

The rear surface of the front frame 130 is provided with a pair of left and right first elastic pieces 134a, 134b extending a predetermined length to the rear, and each rear end of the first elastic piece 134a, 134b at the rear frame 110 It is inserted into the first engaging holes (114a, 114b) formed in the left and right sides of the depression 112 of the) is provided with a locking jaw elastically caught therein.

The adapter outer tube 140 is inserted into the recess 112 of the rear frame 110 through the opening 132 of the front frame 130, as shown in Figs. The adapter outer pipe 140 is a tubular member, the insertion force of the adapter outer pipe 140 around the hinge hole (118a) when the cover 120 is in contact with the cover 120 at the tip facing the cover 120 It is provided with an elastic portion 142 to rotate the cover 120 in the opening direction.

The elastic portion 142 is provided with a second elastic piece 142b provided between the pair of cutouts 142a formed on the outer surface of the adapter outer tube 140, and the second elastic piece 142b of The free end is provided with a locking step 142c that is elastically inserted into the second locking hole 117 formed in the recess 112.

Then, at the rear end of the second elastic piece 142b, the pressing member 142d is protruded to be inserted into the second locking hole 117 so as to release the locking of the locking step 142c.

Accordingly, when the adapter outer tube 140 is inserted through the opening 132 of the front frame 130, the elastic portion 142 provided at the tip of the adapter outer tube 140 is the rear frame 110. Contact the upper end of the cover 120 rotatably assembled to the hinge portion 118 of the), and by the insertion force of the adapter outer tube 140, the cover 120 is a hinge hole of the hinge portion 118 The tip of the connecting pipe 111 of the rear frame 110 is opened by being flipped while pivoting in the opening direction (clockwise in the drawing) with respect to 118a.

At this time, the free end 127b of the elastic body 127 in contact with the end of the cover 120 is bent into the fitting jaw 126 to have an elastic restoring force.

At the same time, the locking jaw 142c formed at the front end of the second elastic piece 142b is elastically inserted into the second locking hole 117 formed in the recess 112 of the rear frame 110 to be locked. The adapter outer tube 140 is fixedly coupled to the rear frame 110 while the tip outer surface of the adapter outer tube 140 is spaced between the inner surface of the recess 112 and the outer surface of the connector tube 111. It is inserted into the vacuum suction input is in close contact with the external leakage.

On the contrary, when the adapter outer tube 140 is to be separated, when the pressing member 142d protruding from the rear end of the second elastic piece 142b is pressed, the tip of the second elastic piece 142b is lowered. As it is lowered to the second locking hole 117 and the latch is easily released, and at the same time the adapter outer tube 140 is pulled out to separate from the rear frame 130.

At the same time, the cover 120 that has been flipped to open the front end of the connecting pipe 111 is released by the binding force by the adapter outer pipe 140 and is freed, thereby allowing the hinge hole to be resilient by the elastic restoring force of the elastic body 127. 118a is rotated back to its original state (counterclockwise in the drawing) and is converted to a vertical state to block the front end of the connecting pipe 111.

Meanwhile, the adapter outer tube 140 includes a second terminal portion 145 to be electrically connected to a signal line provided in the flexible hose 41, and the second terminal portion 145 includes the adapter outer tube 140. And the first terminal portion 115 protruding from the inner circumferential surface of the recess 112 when the coupling between the rear frame 110 and the electrical contact.

The second terminal portion 145 is a terminal plate 145a disposed in the left and right pair of placement portions 147 formed in the lower outer surface of the adapter outer tube 140, and the fixing hole formed in the placement portion 147 The fixing jaw 145b protrudes from the upper end of the terminal plate 145a to be inserted into and fixed to the 147a.

1 and 2 and 4, the adapter inner tube 150 is provided with a tube member connected to the end of the flexible hose 41 and assembled in the adapter outer tube 140, such an adapter The inner tube 150 has a front body 151 having an incision 153 cut in an arc at the tip facing the connecting tube, and a coupling jaw 154 coupled to an end of the flexible hose on an outer surface. Equipped with a protruding rear body 152 is configured.

Between the front body 151 and the rear body 152 is provided integrally with the annular projection 155 is caught on the step 149 formed on the inner surface of the adapter outer tube 140 and the projection 155 It is provided with a fastening hole 155a to be matched with the fastening hole 148 formed on the outer surface of the adapter outer tube 140 is fastened to the fastening member.

Accordingly, the adapter inner tube 150 inserted into the adapter outer tube 140 is fastened to the fastening hole 155a of the protrusion 155 and the fastening hole 148 of the adapter outer tube 140. It is assembled integrally by the fastening member.

In addition, the protruding portion 155 includes a withdrawal groove 155b through which a signal line provided in the flexible hose 41 coupled to the rear body 152 is drawn out, and the withdrawal is provided on the outer surface of the front body 151. By having the arrangement groove 156 in which the signal line drawn out through the groove 155b is disposed, an end of the signal line disposed in the arrangement groove 156 is provided in the adapter outer tube 140. It is electrically connected to the fixing jaw (145b) formed on the terminal plate (145a).

When the cleaning operation is to be performed using the hose connecting device 100 having such a configuration, as shown in FIGS. 5 and 6, a frame in which the front frame 130 is coupled to the front of the rear frame 110 is coupled. The assembly is installed on the floor 1 or the wall 2 on which the suction port 30 of the suction pipe 20 extending from the central dust collector 10 is disposed.

At this time, the front end of the connecting pipe 111 provided in the rear frame 110 is closed by a cover 120, the rear end of the connecting pipe 111 is connected to the suction port (30).

In addition, the adapter inner tube 150 connected to the flexible hose 41 is coupled to the inside of the adapter outer tube 140 to form an adapter assembly.

In this state, the user mounts the adapter assembly with one hand and inserts the adapter outer tube 140 into the depression 112 of the front frame 110 through the opening 132 of the front frame 130. In this case, the second elastic piece 142b of the elastic portion 142 provided at the tip of the adapter outer tube 140 is in contact with the cover 120 and the adapter outer tube (118a) around the hinge hole (118a) By rotating the cover 130 in the opening direction (counterclockwise in the drawing) by the insertion force of 140, the front end of the connecting pipe 111 connected to the suction port 30 is switched to the horizontal state at the same time. Done.

Here, when the free end (127b) in contact with the end of the cover 120 is provided with an elastic body 127, the free end of the elastic body 127 is bent toward the fitting jaw 126 to generate an elastic restoring force. .

In succession, the locking jaw 142d formed at the tip of the second elastic piece 142b is elastically inserted into the second locking hole 117 formed in the recess 112 to be engaged and coupled to the frame assembly. The locking force of the outer tube 140 is maintained until the cleaning is completed.

At this time, the terminal pin 115d of the first terminal portion 115 provided in the rear frame 110 protrudes to the inner surface of the recess 112, and the second terminal portion provided in the adapter outer tube 140. Since the terminal plate 145a of the 145 is exposed to the outside, the first terminal 115 and the second terminal 145 are electrically connected to each other when the adapter outer tube 140 and the frame assembly are coupled to each other. Accordingly, when the first and second terminal portions 115 and 145 are connected, the control switch generates a vacuum suction input by a signal applied to the central dust collector 10 and is electrically connected to the signal line of the flexible hose 41. By using it can be appropriately adjusted the strength of the suction force provided by the central dust collector (10).

On the other hand, when all the cleaning work is finished to remove the adapter outer tube 140, the user presses the pressing member 142d protruding to the rear end of the second elastic piece 142b with one hand to press the 2 As the front end of the elastic piece 142b is lowered to the lower side and the locking with the second locking hole 117 provided in the rear frame 110 is released, the adapter outer tube 140 is inserted in the opposite direction to the insertion direction. Pulling to separate the adapter assembly from the frame assembly 110.

At the same time, since the cover 120 which has been switched to a horizontal state to open the front end of the connecting pipe 111 is released from the adapter outer tube 140, the binding force is released, so that the weight of the cover 120 or the elastic body By the elastic restoring force of 127, the hinge hole 118a is rotated back to its original state (clockwise in the drawing) and converted to a vertical state, thereby blocking the front end of the connecting pipe 111.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is an exploded perspective view showing a hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention.

Figure 2 is a rear perspective view showing a hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention.

3 is a perspective view showing a cover employed in the hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention.

Figure 4 is a longitudinal sectional view showing a hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention.

5 is a state diagram in which the hose connection device of the centralized vacuum suction system according to the preferred embodiment of the present invention is separated.

Figure 6 is a state diagram coupled to the hose connecting device of the centralized vacuum suction system according to a preferred embodiment of the present invention.

7 is a schematic diagram illustrating a general centralized vacuum suction system.

8 is a perspective view showing a suction inlet employed in a general centralized vacuum suction system.

Explanation of symbols on the main parts of the drawings

10: central dust collector 20: suction pipe

30: inlet 41: flexible hose

110: rear frame 111: connector

112: depression 114a, 114b: first locking hole

115: first terminal portion 118: hinge portion

120: cover 122: hinge pin

130: front frame 132: opening

134a, 134b: first elastic piece 140: adapter outer tube

142: elastic portion 142b: second elastic piece

145: second terminal portion 150: adapter inner tube

Claims (14)

In the device for connecting between the suction port and the flexible hose provided at the end of the suction pipe extending from the central dust collector, A rear frame having a connection pipe coupled to the suction port, and having a depression for exposing the front end of the connection pipe to the outside; A cover rotatably assembled to a hinge part provided in the depression to open and close the connection pipe; A front frame having a predetermined size opening for exposing the cover to the outside and assembled to the rear frame; An adapter outer tube having an elastic part elastically fastened to the rear frame while the cover is rotated in an opening direction at a front end facing the cover and inserted into the recess through the opening; And And an adapter inner tube connected to an end of the flexible hose and assembled in the adapter outer tube. The adapter inner tube includes a front body having an incision cut in an arc at the front end facing the connecting tube, and a rear body protruding the engaging jaw coupled to the end of the flexible hose on the outer surface. Hose connection of centralized vacuum suction system. The hose connecting device of claim 1, wherein the connection pipe includes a small diameter part disposed in the recess and a large diameter part coupled to the suction port. The first locking hole of claim 1, wherein the rear frame has first and second elastic pieces extending a predetermined length from the rear surface of the front frame at left and right sides of the recessed part, and fastening the locking jaw formed at the front end of the first elastic piece. Hose connecting device of the centralized vacuum suction system characterized in that it comprises a. The method of claim 1, wherein the rear frame is connected to the hose of the centralized vacuum suction system, characterized in that the suction port is provided on any one of the floor or wall. The hose connecting device of the centralized vacuum suction system according to claim 1, wherein the rear frame has any one of an upper and a lower cutting line on the rear surface. The method of claim 1, wherein the depression further comprises a pair of left and right first terminal portion which is electrically connected to the central dust collector on the rear surface, The first terminal portion includes a boss integrally provided with the recessed portion, a screw member fastened to the boss, a terminal pin inserted into the boss to expose a tip to an inner circumferential surface of the connecting pipe, and between the screw member and the terminal pin. The hose connecting device of the centralized vacuum suction system, characterized in that it comprises a spring member provided to support the terminal pin elastically. According to claim 1, The cover has a left and right wings protruding rearward from the left and right both sides, The left and right wings are characterized in that it comprises a hinge pin rotatably assembled in the hinge hole formed in the hinge portion Hose connection of centralized vacuum suction system. The hose connecting device of the centralized vacuum suction system according to claim 1, wherein the cover has a circular ring having an inner diameter larger than an outer diameter of the connector end. According to claim 1, wherein the cover is fixed to the fitting end formed on the outer surface of the front end of the connecting tube, and further includes an elastic body having a free end extending in a predetermined length from the fixed end and in contact with the top of the cover Hose connecting device of the centralized vacuum suction system characterized in that. According to claim 1, wherein the elastic portion includes a second elastic piece provided between the pair of cutouts formed on the outer surface of the adapter outer tube, The second elastic piece is connected to the hose of the centralized vacuum suction system, characterized in that the front end is provided with a locking jaw is elastically inserted into the second locking hole formed in the depression. The hose connection of the centralized vacuum suction system according to claim 10, wherein the second elastic piece has a pressing member which protrudes at a rear end and is inserted into the second locking hole to release the locking of the locking jaw. Device. According to claim 1, The adapter outer tube further includes a second terminal portion electrically connected to the signal line provided in the flexible hose, The second terminal portion is disposed on the left and right pairs of placement portions formed in the lower outer surface of the adapter outer tube, and includes a terminal plate protruding to the upper end of the fixing jaw inserted and fixed in the fixing hole formed in the placement portion Hose connecting device of the centralized vacuum suction system, characterized in that. delete The method of claim 1, wherein the hose connecting device of the centralized vacuum suction system, characterized in that between the front body and the rear body is provided with a projection on the step formed on the inner surface of the adapter outer tube.

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