JPH0824183A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To facilitate the installation and removal of a power source cord to and from a body, and to obtain a stable connecting condition during use, and to automatically release the connecting condition when an excessive tension is applied to the cord. CONSTITUTION:A receptacle 35 of a body for a plug 36 of a power source cord 34 is arranged on the side of the peripheral side surface 3a of the body, remote from the suction port side, and a holding means for releasably holding the plug 36 of the cord 34 inserted into the receptacle 35, with a predetermined holding force, is provided in the vicinity of the receptacle 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner in which an upper case having a built-in electric blower and a lower case for collecting dust can be separated from each other, and more particularly, a power cord is connected to a main body of the electric vacuum cleaner. And the connection between the upper and lower cases in the remote control circuit.

[0002]

2. Description of the Related Art Conventionally, there is known an electric vacuum cleaner in which an upper case having a built-in electric blower and a lower case for collecting dust can be separated from each other. In such a vacuum cleaner, one end of the power cord is firmly connected to the main body of the vacuum cleaner in advance and the other end is pulled out from the main body of the vacuum cleaner, and the power cord is independent of the main body of the vacuum cleaner. There are two types, that is, a type configured to be connected and connected by being inserted into the insertion port of the electric vacuum cleaner body. Further, since the hose is connected to the lower case, the remote control circuit connected to the switch of the hand operation unit has a built-in lower case and electric blower in addition to the electrical connection between the hose and the lower case. It has an electrical connection with the upper case.

This will be described in more detail with reference to FIGS. 13 and 14. FIG. 13 is a vertical cross-sectional view showing a main body of a conventional electric vacuum cleaner of the type shown in Japanese Utility Model Laid-Open No. 1-175656 in which a power cord is independent of the electric vacuum cleaner main body, and FIG. 14 is a perspective view showing its appearance. It is a figure.

In this vacuum cleaner, the main body 1 is an electric blower 2
The upper case 3 with a built-in case and the lower case 5 containing the dust collecting bag 4 for collecting dust are separated, and the upper and lower cases 3 and 5 are integrated by a plate-shaped clamp body 6. . The lower case 5 is composed of a bottomed container made of a steel plate or a synthetic resin with an open top, and is fixed on a base 9 having fixed wheels 7 and casters 8 that can be oriented, and a hose (not shown) is provided on the peripheral side surface thereof. Is provided with a suction port 10 for connecting to. The suction port 10 is formed of an outer suction cylinder 12 and an inner suction cylinder 13 which are connected to a hole 11 formed in a side wall of the lower case 5 from the outside and the inside and screwed to each other.
The dust collecting bag 4 housed in the lower case 5 is attached to the paper bag 14 and the front opening of the paper bag 14 and has the dust collecting hole 1 at the center thereof.
And a rectangular mouth plate 16 in which 5 is formed,
The upper and lower sides of the hook are engaged with hooks 17 and 18 provided on the upper and lower sides of the inner suction cylinder 13 in the lower case 5 to be fixed at predetermined positions. Further, the periphery of the dust suction hole 15 of the mouth plate 16 is sealed by the sealing body 19 provided on the outer periphery of the inner suction cylinder 13. The upper case 3 has a handle 20 at the upper part thereof and a blower housing cylinder 21 at the lower part which fits into the lower case 5, so that the upper and lower cases 3 and 5 can be easily separated and assembled by the handle 20. Has become. Further, a power cord insertion port 22 is provided on the peripheral portion of the upper surface of the upper case 3, and a power cord (not shown) of the power brush (neither is shown) is provided at a position above the suction port of the lower case 5 on the peripheral side surface thereof. An insertion port 23 is installed. The reason for providing the power cord insertion port 22 on the upper surface of the upper case 3 is as follows. That is, the outlet near the wall into which one end of the power cord is plugged has a power (N) required to pull out the plug according to "Technical Standards and Bylaws of Electrical Appliances", that is, a plug holding power, with a rated current of 15A or less. If the number of poles is 2, it is defined as 5N or more and 60N or less, and in order to prevent disconnection accidents when tension occurs in the power cord, the electric device side (vacuum cleaner side) is inevitable. It is necessary to weaken the plug holding power of. However, for vacuum cleaners that are used while the device itself is constantly being moved,
Since tension is frequently generated in the power cord, it is necessary to prevent the power cord from being easily pulled out from the device side each time tension is generated. Furthermore, the plug holding force on the device side tends to deteriorate and weaken over time. In order to meet these contradictory requirements, in the conventional vacuum cleaner of the type in which the power cord is independently configured, the power cord insertion port 22 is provided on the upper surface of the upper case 3, and the extension direction of the power cord (tensile direction). ) And the plug is inserted in the direction that intersects with it, so that the power supply cord is prevented from coming off easily from the device side while the plug holding force on the device side is weakened.

Further, in such a case, when a remote control function is added by providing an ON-OFF switch of the electric blower 2 in the hand operation part of the hose, the remote control is performed because the hose is connected to the lower case 5. In the circuit, in addition to the electrical connection between the hose and the lower case 5, an electrical connection between the lower case 5 and the upper case 3 containing the electric blower 2 is required. In this case, the electrical connection between the hose and the lower case 5 is generally a pin electrode provided on one side and a connection plate provided on the other side when the hose is inserted into the suction port 10 and mechanically connected. And suction port 10
It is performed by contacting inside. Further, the electrical connection between the lower case 5 and the upper case 3 containing the electric blower 2 is also made by contacting the pin electrode provided on one side with the connecting plate provided on the other side when the upper and lower cases 3 and 5 are assembled. It is carried out by The electrical connection between the upper and lower cases 3 and 5 is
Conventionally, a structure has been adopted in which a wall body installed around a pin electrode or a connection plate is hermetically sealed at the time of connection.

[0006]

The conventional vacuum cleaner has the following problems.
The main body 1 is connected to the power source by inserting the linear or L-shaped plug, which is configured as described above and is provided at one end of the power cord, into the insertion port 22 from the upper surface of the upper case 3, and the tension is set. In the event of occurrence of this, this tension acts in a direction that intersects with the direction of pulling out the plug to prevent the power cord from coming off easily from the equipment side. For this reason, if excessive tension is applied to the power cord carelessly during use, there is a problem that a load is applied to the plug in the terminal bending direction to deform the connection portion or break the power cord. Such a problem also occurs in a type in which one end of the power cord is firmly connected to the main body of the vacuum cleaner in advance and the other end is pulled out from the main body of the vacuum cleaner.

The electrical connection between the lower case 5 and the upper case 3 in the remote control circuit is hermetically sealed at the time of connection with the wall, but the mating terminal is inserted into the wall. Since the use opening is formed, it is unavoidable that dust and water splashed from the cleaning tool (for example, floor wiper) enter the insertion opening when the upper and lower cases 3 and 5 are separated. Dust or water that has entered the insertion opening may cause a short-circuit accident or the like, so it must be removed from the insertion opening. Conventionally, this dust removal operation is performed when the upper and lower cases 3 and 5 are separated. In other words, it could only be performed when the vacuum cleaner was in an unusable state, and its function could not be utilized. Further, the upper case 3 has a heavy weight because the electric blower 2 and the like are built therein, and the center of gravity is unavoidably deviated from the center of the upper case due to the internal devices and the like. Another problem is that it is troublesome to assemble the upper case 3 and the lower case 5 while holding and aligning the electrical connection between the upper and lower cases 3 and 5.

The present invention has been made in view of the above points, and a first object thereof is that the power cord can be easily attached to and detached from the main body, a stable connection state can be obtained during use, and the power cord is excessive. The purpose is to be able to automatically release the connection state when tension is applied.

A second object of the present invention is to easily align the electrical connecting portions between the upper and lower cases in the remote control circuit so that the assembling work of the upper and lower cases can be performed easily and the electrical connection thereof can be made. Another object of the present invention is to enable the work of removing dust or the like that has entered the wall surrounding the portion to be performed while the electric vacuum cleaner is in operation.

[0010]

In the vacuum cleaner according to the present invention, the insertion port of the plug of the power cord is arranged on the side opposite to the suction port on the peripheral side surface of the main body, and the plug is inserted near the insertion port. A holding means for holding the plug of the power cord inserted in the mouth in a detachable manner with a predetermined holding force is provided.

Further, the holding means is swingably provided on one of the upper and lower cases via a lever, and the free end side is bent in a substantially U shape so as to engage with the taper portion or the flange portion of the plug from both sides of the power cord. The wire rod is formed from the formed wire rod, and the wire rod is provided at its free end with a locking portion that removably engages with the other peripheral edge portion of the upper and lower cases to join the upper and lower cases.

Further, the wire rod has both ends removably supported by the lever, and a narrow portion is formed on a part of the free end side thereof, and the narrow portion is engaged with the plug of the power cord.

Further, a guide wall for guiding the mating terminal is installed around the electrical connection between the upper and lower cases in the remote control circuit, and a part of the guide wall is connected to the outside when the upper and lower cases are assembled. It is provided with an opening.

Further, the electrical connection portion is provided so as to project outward from the main body.

Further, the terminal of the electrical connection portion is such that the connection plate is arranged on the upper case side and the pin electrode is arranged on the lower case side, and the height of the pin electrode is set lower than the upper end of the guide wall.

Further, the bottom of the space surrounded by the guide wall is hermetically sealed with a mounting plate for the pin electrode, and the upper surface of the mounting plate is formed as a slope inclined downward toward the open portion of the guide wall. .

Further, a gap is provided between the end face of the connecting plate side connecting portion fitted into the guide wall and the upper face of the mounting plate of the pin electrode.

Further, the pin electrode insertion hole formed in the end face of the connection plate side connection portion is formed in an elliptical shape having a major axis in the center direction of the upper case.

[0019]

In the present invention, the insertion port of the plug of the power cord is arranged on the peripheral side surface of the main body on the side opposite to the suction port. The vacuum cleaner is used while the suction port side of the main body is pulled by a hose and is constantly moved. Therefore, when tension is generated in the power cord under normal use, this tension acts in the direction of pulling out the plug of the power cord from the main body. Therefore, if excessive tension is inadvertently applied to the power cord, the power cord will easily detach from the main unit side,
The connection status is automatically released. As a result, deformation of the connecting portion and disconnection accident are prevented. In addition, a holding means for holding the plug of the power cord inserted in the insertion port detachably with a predetermined holding force is provided near the insertion port. This holding means prevents the power cord from coming off from the main body side due to the relatively weak tension that frequently occurs in normal use, and even when the plug holding force on the main body side deteriorates due to aging and weakens. , Keep a stable connection.

Further, the holding means is swingably provided on one of the upper and lower cases via a lever, and the free end side is bent into a substantially U shape so as to engage with the taper portion or the flange portion of the plug from both sides of the power cord. A plug holding force is formed by forming the wire rod from the formed wire rod, and providing the wire rod with a locking portion that detachably engages with the other peripheral edge portion of the upper and lower cases at the free end thereof to join the upper and lower cases. It can be easily obtained by the spring force of the wire, and the upper and lower cases can be coupled by the locking portion provided at the free end of the wire, and the plug holding means can have the function of clamping the upper and lower cases.

Furthermore, the wire member has a structure in which both ends of the wire member are detachably supported by the lever, and a narrow portion is formed in a part of the free end side, and the narrow portion is engaged with the plug of the power cord. For example, if excessive tension is applied to the power cord and the narrow part of the wire is pushed open, the wire will be separated from the lever and separated from the main body together with the plug.Therefore, an excessive pushing force will not act on the narrow part of the wire. Plastic deformation is prevented.
For this reason, it becomes easy to re-install after detachment. In addition, it is not necessary to set the wire length long to obtain the spring force that is the plug holding force, and the length dimension can be compressed, and the upper and lower cases for connecting the upper and lower cases of the plug engaging part (narrow part) can be connected. The size of the engaging portion can be set large regardless of the plug engaging portion, and the clamping function of the upper and lower cases can be enhanced.

Further, a guide wall for guiding the mating terminal is installed around the electrical connection between the upper and lower cases in the remote control circuit, and a part of the guide wall is connected to the outside when the upper and lower cases are assembled. Since the open part is provided, it is possible to remove dust that has entered the guide wall.
This can be done by bringing the suction port of the hose close to the open part while the vacuum cleaner is in operation.

Furthermore, the position of the electrical connecting portion between the upper and lower cases is made clear by providing the electrical connecting portion between the upper and lower cases so as to project outward from the main body, and aligning the electrical connecting portion between the upper and lower cases. Also, the work of assembling the upper and lower cases becomes easy.

Further, the terminals of the electrical connecting portions are arranged such that the connecting plate is arranged on the upper case side and the pin electrodes are arranged on the lower case side, and the height of the pin electrodes is set lower than the upper end of the guide wall. The connecting plate terminal on the upper case side can be guided to the pin electrode side by the guide wall from the stage before the connecting plate terminal on the case side contacts the pin electrode, making the electrical connection work between the upper and lower cases easier. Can be done.

Furthermore, the bottom of the space surrounded by the guide wall is sealed by the pin electrode mounting plate, and the upper surface of the mounting plate is formed as a slope inclined downward toward the open portion of the guide wall. The dust and water that have entered the guide wall can be naturally guided to the open portion and discharged to the outside, and the accumulated dust can be easily removed.

Further, by providing a gap between the end face of the connecting plate side connecting portion fitted in the guide wall and the upper face of the mounting plate of the pin electrode, even if dust enters the guide wall, this is a hindrance to the connection. It is possible to prevent this from happening, and it is possible to easily perform the removing work under the operating condition of the electric vacuum cleaner.

Furthermore, by forming the pin electrode insertion hole formed in the end face of the connecting plate side connecting portion into an elliptical shape having a major axis in the central direction of the upper case, the position of the center of gravity of the upper case is the center of the upper case. Even if the upper case tilts toward the electrical connection part during the connection work, the tilt can be absorbed by the elliptical hole, and the position of the electrical connection part between the upper and lower cases can be aligned. Can be performed more easily, and as a result, the work of assembling the upper and lower cases can be performed more easily. Further, by making the hole for inserting the pin electrode into an elliptical shape, it is possible to reduce the area of the opening, which can prevent dust from entering the electric contact portion and prevent contact failure.

[0028]

【Example】

Example 1. The present invention will be described below with reference to illustrated embodiments.
1 to 5 show an electric vacuum cleaner according to claims 1, 2 and 3 of the present invention. FIG. 1 is a vertical cross-sectional view showing the overall structure of the electric vacuum cleaner, and FIG. FIG. 3 is a perspective view showing an example of the dust bag, FIG. 5 is another example of the dust bag, and FIG. FIG. 4 is a perspective view showing a part of FIG.

In the electric vacuum cleaner of this embodiment, the main body 1 has a substantially cylindrical upper case 3 in which an electric blower 2 is built, and a hose 3.
And a substantially cylindrical lower case 5 having a suction port 10 for 0 connection and accommodating a dust bag 4 for collecting dust,
The upper and lower cases 3 and 5 are integrated by holding means 31A and 31B installed at two positions on the suction port side and the non-suction port side of the main body 1 (in this embodiment, a position directly above the suction port and its symmetrical position). Has become. A handle 32 or 33 is provided on the outer surface of the dust collecting bag 4 as shown in FIGS. Holding means 31B on the side opposite to the suction port on the peripheral side surface 3a of the upper case 3
The insertion port 35 of the power cord 34 is provided at a position corresponding to the power cord 34.
The female plug 36 is detachably held by the holding means 31B with a predetermined holding force. Holding means 31
B is formed of a wire 38 that is swingably provided on the lower case 5 via a lever 37. As shown in FIGS. 2 and 3, the wire 38 is bent into a substantially U shape, and both ends 38a and 38b thereof are detachably supported in the holes 37a and 37b of the lever 37, and one end of the wire 38 is free. A narrow portion 38c is formed in the portion, and the narrow portion 38c is adapted to engage with the female plug 36 from both sides of the power cord 34.
Further, the free end of the wire 38 is detachably engaged with the hooking portion 3b provided on the peripheral portion of the upper case 3, and the upper and lower cases 3, 5 are formed.
Is provided with a locking portion 38d. Lever 3
7 is attached to the lower case 5 via a pin 39 so as to be vertically rotatable. The holes 37a and 37b, which are the support portions of both ends 38a and 38b of the wire rod 38 in the lever 37, are formed at the positions where the lever 37 is rotated downward about the pin 39 until it abuts the outer peripheral surface of the lower case 5. , Wire rod 3
Both ends 38a, 38b of 8 are set at positions where they are locked beyond the imaginary point. The holding means 31A also holds the holding means 31B.
Is configured similarly to. Of the upper and lower hooks 17 and 18 that engage with the upper and lower sides of the mouth plate 16 of the dust collecting bag 4 to fix the mouth plate 16 at a predetermined position, the upper hook 17 is movably mounted in the lower case 5. ing. The power cord 34 has a male plug 41 at one end that is plugged into a wall outlet.
And a female plug 36 inserted into the insertion port 35 of the upper case 3 at the other end. Female plug 36
Is internally provided with a pair of blade receivers 36a for electrical connection, and is connected to the cord 36b. Also, the female plug 36
The section in which the blade receiver 36a is incorporated has a rectangular cross-sectional shape, and the taper portion 36c and the collar portion 36 are provided while reaching the cord side.
d is provided, and these constricted portions (tapered portions 36c in this embodiment) engage with the narrow portions 38c of the holding means 31B. It should be noted that casters 8 which can be oriented by wheel mounting legs 42 are attached to a plurality of locations (only one location is shown in FIG. 1) on the lower peripheral surface of the lower case 5. The other configuration is the same as the conventional one.

In the electric vacuum cleaner of the present embodiment, when the female plug 36 of the power cord 34 and the holding means 31B are assembled, the engaging portion 38d of the wire 38 of the holding means 31B is first attached to the hooking portion of the upper case 3. U of the wire 38 in the state of being removed from 3b
The female plug 36 is inserted into the character-shaped gap, and the inserted female plug 36 has a tapered portion 36 c, which is a narrow portion 38 of the wire 38.
Pull up until it fits between c. Next, while hooking the locking portion 38d of the wire 38 on the hooking portion 3b of the upper case 3,
After inserting the female plug 36 held between the narrow portions 38c of the wire 38 into the insertion port 35 of the upper case 3, rotate the lever 37 downward until it abuts the outer peripheral surface of the lower case 5. Thus, both ends 38a and 38b of the wire rod 38 are locked beyond the imaginary point. Thereby, the female plug 36 can be held by the holding means 31B. Further, since the holding means 31B also has a clamping function for the upper and lower cases 3 and 5, at the same time when the assembling of the female plug 36 and the holding means 31B is completed, the coupling of the upper and lower cases 3 and 5 on one side is also completed. . The upper and lower cases 3 and 5 are holding means 31.
When they are connected at both sides by A and 31B, the male plug 41 of the power cord 34 is inserted into an outlet near the wall, and cleaning is performed by an electric vacuum cleaner.

In the vacuum cleaner of this embodiment, the insertion port 35 of the female plug 36 of the power cord 34 is on the side opposite to the suction port of the peripheral side surface 3a of the upper case 3, that is, the suction port 1 in plan view.
It is arranged in a symmetrical position of 0. The electric vacuum cleaner is used while the main body 1 is always moved, and when moved, the main body 1 is pulled by the hose 30 so that the suction port 10 side is always located at the tip side in the moving direction. Therefore, when tension is generated in the power cord 34 under normal use, this tension is applied to the suction port 1
On the line connecting 0 and the wall-side outlet, that is, the insertion port 35
It acts in the direction of pulling out the female plug 36 from. Since the female plug 36 is held by the holding means 31B, the holding means 31B receives a comparatively weak tension that is frequently generated in a normal use state, and prevents the female plug 36 from coming out of the insertion port 35. . Also, carelessly use the power cord 34
When excessive tension is applied to the holding means 31B,
The narrow portion 38c of the wire rod 38 is expanded by the taper portion 36c of the female plug 36, whereby the distance between both ends 38a, 38b of the wire rod 38 is also widened, and both ends 38a, 38b of the wire rod 38 have holes 37a of the lever 37, 37b, it separates from the main body 1 together with the female plug 36, and the connection state is automatically released. Female plug 36 and holding means 3
To re-install 1B, both ends 38a, 38b of the wire 38
Is inserted into the holes 37a and 37b of the lever 37, and then the assembling work is performed according to the assembling procedure described above.

As described above, in the electric vacuum cleaner of this embodiment, since the insertion port 35 of the female plug 36 of the power cord 34 is arranged on the side opposite to the suction port of the peripheral side surface 3a of the upper case 3, the power source When a tension is generated in the cord 34, the tension can be applied in the pulling direction. Therefore, when excessive tension is inadvertently applied to the power cord 34, the power cord 34 can be easily detached from the upper case 3, thereby preventing deformation of the connection portion and disconnection accident. You can In addition, in the vicinity of the insertion port 35, the insertion port 35
Since the holding means 31B for detachably holding the female plug 36 of the power cord 34 inserted in the power cord 34 with a predetermined holding force is provided, the power cord 34 is urged by the relatively weak tension frequently generated in the normal use state. Can be prevented from coming off from the upper case 3, and a stable connection state can be obtained even when the plug holding force of the insertion port 35 deteriorates and weakens due to aging.

Further, the holding means 31B is swingably provided on the lower case 5 via a lever 37, and its free end side is substantially U-shaped so as to engage with the tapered portion 36c of the female plug 36 from both sides of the power cord 34. The wire member 38 is formed by bending the wire 38, and the free end of the wire member 38 has the hooking portion 3 of the upper case 3.
Since the locking portion 38d that detachably engages with b and connects the upper and lower cases 3 and 5 is provided, the plug holding force is increased.
It can be easily obtained by the spring force of 8, and
The upper and lower cases 3 and 5 can be coupled by a locking portion 38d provided at the free end of the wire 38, and the holding means 31B of the female plug 36 can have a clamping function for the upper and lower cases 3 and 5.

Furthermore, the wire 38 has both ends 38a,
38b is detachably supported in the holes 37a and 37b of the lever 37, and a narrow portion 38c is formed at a part of the free end side thereof.
Is formed so that the narrow portion 38c is engaged with the taper portion 36c of the female plug 36 of the power cord 34, excessive tension is applied to the power cord 34, and the narrow portion 38 of the wire 38 is formed.
When c is expanded, the wire 38 is separated from the lever 37 and separated from the main body together with the female plug 36. Therefore, it is possible to prevent an excessive expansion force from being applied to the narrow portion 38c of the wire 38. The plastic deformation can be prevented. For this reason, it is possible to easily re-install after detachment. Also, in order to obtain the spring force that becomes the plug holding force,
It is not necessary to set the wire 38 to be long, and the length dimension can be compressed, and the width dimension of the upper and lower case coupling locking portions 38d at the tip of the narrow portion 38c is set to be large regardless of the narrow portion 38c. Can be, upper and lower case 3,5
The clamping function of can be enhanced.

In the above-described embodiment, the insertion port 35 of the female plug 36 of the power cord 34 is provided on the peripheral side surface 3a of the upper case 3.
The vacuum cleaner body is arranged symmetrically with respect to the suction port 10 so that all the tension acts in the direction of pulling out the female plug 36.
Since it is configured to be freely rotatable in the horizontal plane, the intended purpose can be achieved no matter where the insertion port 35 is installed within a range of 90 ° to the left and right of the symmetrical position of the suction port 10.
In the above-described embodiment, the female plug 36 is held by engaging the narrow portion 38c of the wire 38 with the tapered portion 36c of the female plug 36.
As the engaging portion, other than that, for example, the narrow portion 38 of the wire 38
c may be engaged with the flange portion 36d of the female plug 36,
In short, the constricted portion of the female plug 36, that is, the portion that can gradually expand the narrow portion 38c when a tension acts, can obtain the same effect as that of the above-described embodiment even in such a case. You can

Example 2. 6 to 12 show an electric vacuum cleaner according to claims 4, 5, 6, 7, 8, and 9 of the present invention, and FIG. 6 is a cross-sectional view showing the arrangement of substrates of the remote control circuit. FIG. 7 is an enlarged vertical sectional view showing an electrical connection portion between the upper and lower cases, which is a main part thereof, FIG. 8 is a side view of the upper case, and FIG. 9 is an enlarged electrical connection portion on the upper case side. 10 is an enlarged vertical sectional view showing an electrical connection portion between the hose and the lower case, and FIG. 11 is an enlarged perspective view showing the electrical connection portion on the lower case side. FIG. 12 is an electric circuit diagram thereof. In each drawing, the same parts as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the vacuum cleaner of this embodiment, the substrate of the remote control circuit is housed in the upper case 3.
The boards of the remote control circuit are the main board 52 to which the bidirectional thyristor 51 is attached and the bidirectional thyristor 5.
2 of the transformer substrate 53 that forms a power supply circuit that fires 1
The heat radiation fins 56 of the bidirectional thyristor 51, which are integrally attached to the main board 52, are arranged in the notches 55 of the air passage wall 54 provided on the outer periphery of the electric blower 2 in the upper case 3. The heat radiation fins 56 cool the heat radiation fins 56 themselves by the exhaust flow from the electric blower 2, and are attached at a predetermined angle θ with respect to the tangent line of the air passage wall 54 so that the exhaust flow flows toward the transformer substrate 53. Has been. Further, in order to electrically connect the main board 52 to the transformer board 53 and the switch 58 provided on the hose proximal portion 57, a pair of connecting plates 59 are internally provided on the outer peripheral portion of the upper case 3 and protrude downward. The connection portion 61 is provided and the connection portion 6 is provided.
An elliptical hole 62 having a major axis in the center direction of the upper case 3 is formed in a portion of the end face 1 facing the connecting plate 59. On the other hand, the lower case 5 also has a connecting portion 61 on the upper case 3 side.
A pair of pin electrodes 63 are provided so as to project upward at positions (outer peripheral portions) facing each other, and a guide wall 64 is installed around the pin electrodes 63 so as to cover the pin electrodes 63.
By this, the connection portion 61 on the upper case 3 side can be guided. The height of the pin electrode 63 is set lower than that of the upper end of the guide wall 64. Further, the guide wall 64 is formed with an opening portion 64a at a position facing the peripheral side surface of the lower case 5 by a notch. The opening portion 64a is formed when the upper and lower cases 3 and 5 are assembled, that is, the connection plate 59 and the pin. Electrode 6
Even under the connection state of No. 3, it is set to communicate with the outside. The bottom of the space surrounded by the guide wall 64 is sealed by the mounting plate 65 of the pin electrode 63, and
The upper surface of 5 is formed as an inclined surface 65a that inclines downward toward the open portion 64a of the guide wall 64. The insertion depth of the connection portion 61 into the guide wall 64 is determined by the connection plate 59 and the pin electrode 6.
3 is set to a depth at which a gap A is generated between the end surface of the connection portion 61 and the upper surface (slope) of the pin electrode mounting plate 65 when electrically connecting the upper and lower cases 3 and 5. Pin electrode 63
Is electrically connected to the connection plate 68 that contacts the pair of electrodes 67 on the insertion pipe 66 side of the hose 30 in the suction port 10. The other structure is the same as that of the first embodiment.

In this embodiment, the electrical connection between the upper and lower cases 3 and 5 in the remote control circuit is
Since it is installed between the upper and lower cases 3 and 5 that are repeatedly mechanically attached and detached, it is necessary to ensure that the connection is made securely, and at the same time, the guide walls 64 are separated when the upper and lower cases 3 and 5 are separated. It is necessary to prevent a short-circuit accident from occurring due to invading dust or water splashed from cleaning equipment. At the time of connecting the upper and lower cases 3 and 5, the upper case 3 and the lower case 5 are assembled while aligning the electrical connection between the upper and lower cases 3 and 5 by holding the handle 20. Since the connecting portion 61 is formed so as to project outward, the connecting portion 61 is heavy, and the position of its center of gravity G is near the connecting portion 61 as shown in FIG. Therefore, the upper and lower cases 3, 5
At the time of aligning the electrical connection portion between the two, that is, when the connection portion 61 is fitted into the guide wall 64, the connection portion 61 side is lowered,
It tends to be diagonal.

In this embodiment, the hole 62 of the connecting portion 61 on the upper case 3 side into which the pin electrode 63 on the lower case 5 side is inserted is formed in an elliptical shape having the major axis in the center direction of the upper case 3. Therefore, even if the upper case 3 is tilted, this tilt can be absorbed by the elliptical hole 62, and the electrical connection between the upper and lower cases 3 and 5 can be easily aligned. As a result, the work of assembling the upper and lower cases 3 and 5 can be performed more easily. Further, by forming the hole 62 for inserting the pin electrode 63 into an elliptical shape, it is possible to reduce the opening area, which can prevent dust from entering the electrical contact portion and prevent contact failure. it can.

Further, since the electrical connection portion between the upper and lower cases 3 and 5 is installed so as to project outward from the main body 1, the position of this electrical connection portion becomes clear, and this electrical connection portion is made clear. It becomes easy to perform the position alignment and the assembling work of the upper and lower cases 3 and 5.

Further, since the upper end of the guide wall 64 on the lower case 5 side for guiding the connecting portion 61 on the upper case 3 side is set higher than the internal pin electrode 63, the connecting plate 59 is formed.
Since the connecting portion 61 can be guided from the stage before the contact with the pin electrode 63, the electrical connecting work between the upper and lower cases 3 and 5 can be performed more easily. Furthermore, the guide wall 6
4 protects the pin electrode 63 from an impact applied to the main body 1 during use of the vacuum cleaner, so that unnecessary bending load applied to the pin electrode 63 due to the impact during use can be suppressed, and the pin electrode 63 can be bent or contacted. It can be prevented from becoming defective.

Further, since the opening portion 64a is formed in the guide wall 64 and the opening portion 64a is set so as to communicate with the outside even when the connection plate 59 and the pin electrode 63 are connected, the inside of the guide wall 64 is formed. The work of removing the invaded dust or the like can be performed only by bringing the suction port of the hose 30 close to the opening portion 64a while the electric vacuum cleaner is in operation.

Further, the insertion depth of the connecting portion 61 into the guide wall 64 is set between the end face of the connecting portion 61 and the upper surface (slope) of the pin electrode mounting plate 65 when the connecting plate 59 and the pin electrode 63 are connected. Since the gap A is set in the guide wall 64, even if dust enters the guide wall 64, it can be prevented from interfering with the connection, and the dust can be removed during operation of the vacuum cleaner. Work can be performed easily.

The bottom of the space surrounded by the guide wall 64 is sealed by the pin electrode mounting plate 65, and the upper surface of the mounting plate 65 is inclined downward toward the open portion 64a of the guide wall 64. Since it is formed on the guide wall 6
It is possible to naturally guide the dust, water, etc. that have entered the inside of the container 4 to the open portion 64a and discharge them to the outside, and it is easy to remove the accumulated dust.

[0045]

As described above, according to the present invention, the insertion port of the plug of the power cord is arranged on the side opposite to the suction port on the peripheral side surface of the main body, and the insertion port is provided in the vicinity of the insertion port. Since a holding means is provided to hold the plug of the power cord plugged in with a predetermined holding force in a detachable manner, if excessive tension is inadvertently applied to the power cord, the power cord can be easily pulled from the main body side. It can be detached and the connection state can be automatically released. Therefore, it is possible to prevent the deformation of the connection portion and the disconnection accident due to the excessive tension. Further, the holding means can prevent the power cord from coming off the main body side due to the relatively weak tension frequently generated in the normal use state, and the plug holding force on the main body side deteriorates due to aging. Even if it becomes weak, it can be maintained in a stable connection state.

Further, according to the present invention, the holding means is provided swingably on one of the upper and lower cases via a lever, and the free end side of the holding means is engaged with the taper portion or the flange portion of the plug from both sides of the power cord. The wire member is formed from a U-shaped bent wire, and the wire member is provided at its free end with a locking portion that removably engages with the other peripheral edge of the upper and lower cases to join the upper and lower cases. Since the plug holding force can be easily obtained by the spring force of the wire rod, the upper and lower cases can be joined by the locking part provided at the free end of the wire rod, and the plug holding means can clamp the upper and lower cases. It can have a function.

Further, according to the present invention, both ends of the wire are detachably supported by the lever, and a narrow portion is formed on a part of the free end side so that the narrow portion is engaged with the plug of the power cord. Then, when excessive tension is applied to the power cord and the narrow part of the wire is pushed wide, the wire is separated from the lever and separated from the main body together with the plug.
It is possible to prevent an excessive pushing force from being applied to the narrow portion of the wire and prevent its plastic deformation. For this reason, it becomes easy to re-install after detachment. Furthermore, it is not necessary to set the wire length longer to obtain the spring force that is the plug holding force, and the length dimension can be compressed, and the upper and lower case couplings at the tip of the plug engagement part (narrow part) can be achieved. The size of the locking portion for use can be set large regardless of the plug engaging portion, and the clamp function of the upper and lower cases can be enhanced.

Further, according to the present invention, a guide wall for guiding the mating terminal is installed around the electrical connection between the upper and lower cases in the remote control circuit, and a part of the guide wall is provided with the upper and lower cases. Since the open part that connects to the outside is provided at the time of assembly, it is possible to easily remove dust that has entered the guide wall simply by bringing the suction port of the hose close to the open part while the vacuum cleaner is operating. .

Further, according to the present invention, since the electrical connection portion between the upper and lower cases is provided so as to project outward from the main body,
The position of the electrical connection portion is clarified, which facilitates the positioning of the electrical connection portion between the upper and lower cases and the assembling work of the upper and lower cases.

Further, according to the present invention, the terminal of the electrical connecting portion has the connecting plate on the upper case side and the pin electrode on the lower case side, and the height of the pin electrode is lower than the upper end of the guide wall. Since it is set, the connection plate terminal on the upper case side can be guided to the pin electrode side by the guide wall from the stage before contacting the connection plate terminal on the upper case side with the pin electrode. Connection work can be performed more easily.

Further, according to the present invention, the bottom of the space surrounded by the guide wall is sealed by the mounting plate of the pin electrode, and the upper surface of the mounting plate is inclined downward toward the open portion of the guide wall. Since it is formed, the dust and water that have entered the guide wall can be naturally guided to the open portion and discharged to the outside, and the accumulated dust can be easily removed.

Further, according to the present invention, since a gap is provided between the end face of the connecting plate side connecting portion fitted into the guide wall and the upper face of the mounting plate of the pin electrode, dust enters the guide wall. This can prevent the connection from being a hindrance to the connection, and the removal work can be easily performed while the electric vacuum cleaner is in operation.

Further, according to the present invention, the pin electrode insertion hole formed in the end face of the connecting plate side connecting portion is formed in an elliptical shape having a major axis in the central direction of the upper case, so that the center of gravity of the upper case is positioned. Shifts from the center of the upper case to the electrical connection part side, and the upper case tilts toward the electrical connection part side during the connection work,
This inclination can be absorbed by the elliptical hole, and the electrical connection between the upper and lower cases can be more easily aligned. Therefore, the work of assembling the upper and lower cases can be performed more easily. Further, the elliptical hole for inserting the pin electrode can reduce the area of the opening, which can prevent dust from entering the electrical contact portion. Therefore, contact failure can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the overall configuration of an electric vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an enlarged plug holding means which is a main part of the first embodiment.

FIG. 3 is a lateral cross-sectional view showing an enlarged plug insertion port portion, which is a main portion of the first embodiment.

FIG. 4 is a perspective view showing an example of a dust bag.

FIG. 5 is a perspective view showing another example of the dust bag.

FIG. 6 is a cross-sectional view showing an arrangement of substrates of a remote control circuit of the vacuum cleaner according to the second exemplary embodiment of the present invention.

FIG. 7 is an enlarged vertical cross-sectional view showing an electrical connection portion between upper and lower cases, which is an essential part of the second embodiment.

FIG. 8 is a side view of an upper case which is a main part of the second embodiment.

FIG. 9 is an enlarged perspective view showing an electrical connection portion on the upper case side, which is a main portion of the second embodiment.

FIG. 10 is an enlarged vertical sectional view showing an electrical connection portion between a hose and a lower case of the electric vacuum cleaner according to the second embodiment.

FIG. 11 is an enlarged perspective view showing an electrical connection part on the lower case side, which is a main part of the second embodiment.

FIG. 12 is an electric circuit diagram of the electric vacuum cleaner according to the second embodiment.

FIG. 13 is a vertical cross-sectional view of a conventional electric vacuum cleaner.

FIG. 14 is a perspective view showing an appearance of a conventional electric vacuum cleaner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 main body, 2 electric blower, 3 upper case, 3a peripheral side surface, 3b hooking part, 5 lower case, 10 suction port, 30
Hose, 31A, 31B holding means, 34 power cord,
35 outlet, 36 female plug (plug), 36c
Taper portion, 36d collar portion, 37 lever, 37a, 37
b lever hole, 38 wire, 38a, 38b both ends of wire, 38c narrow part, 38d locking part, 57 hose hand part, 58 switch, 59 connecting plate, 61 connecting part, 62 pin hole for inserting electrode, 63 pin Electrode, 64
Guide wall, 64a opening, 65 mounting plate, 65a slope.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koji Goto, Inventor Kanji Goto 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Inside Mitsubishi Electric Home Appliances Co., Ltd. 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Hidefumi Kubota 29 Kume 29, Iida City, Nagano Prefecture 4 Shinryo Electric Co., Ltd. (72) Inventor Tomohiro Fukuyo 29, Kume 4, Iida City, Nagano Prefecture 4 Shinryo Electric Co., Ltd. Within

Claims (9)

[Claims] 1. An electric vacuum cleaner having a main body having a plug-in port for a power cord and a suction port provided on a peripheral side surface of the main body, wherein the plug-in port is located on a side opposite to a suction port of the main body. And a holding means for holding the plug of the power supply cord inserted in the insertion port detachably with a predetermined holding force, in the vicinity of the insertion port. 2. The main body has an inlet for a power cord, an upper case with a built-in electric blower, and an inlet, and is separably assembled with the upper case to collect dust. The holding means comprises a case and is swingably provided on one of the upper and lower cases via a lever, and the free end side is bent from both sides of the power cord into a substantially U-shape that engages with the taper part or the flange part of the plug. 3. A bent wire rod, wherein the wire rod is provided with a locking portion at its free end for removably engaging with the other peripheral edge portion of the upper and lower cases to join the upper and lower cases. Vacuum cleaner as described. 3. A wire rod, wherein both ends of the wire rod are detachably supported by a lever, and a narrow portion is formed on a part of a free end side of the wire rod, and the narrow portion is engaged with a plug of a power cord. The electric vacuum cleaner according to Item 2. 4. The main body comprises an upper case having a built-in electric blower, and a lower case having a suction port and separably assembled with the upper case to collect dust, and between the upper and lower cases. A vacuum cleaner comprising an electrical connection part of a remote control circuit having a switch of a hand operation part of a hose connected to the suction port, wherein a mating terminal is provided around the electrical connection part of the lower case. An electric vacuum cleaner, in which a guide wall for guiding the above is installed, and an opening which is connected to the outside when the upper and lower cases are assembled is provided in a part of the guide wall. 5. The electric vacuum cleaner according to claim 4, wherein the electric connection portion is provided so as to project outward from the main body. 6. The terminal of the electrical connecting portion comprises a connecting plate on the upper case side and a pin electrode on the lower case side, and the height of the pin electrode is set lower than the upper end of the guide wall. The vacuum cleaner according to claim 5. 7. The bottom of the space surrounded by the guide wall is sealed by a pin electrode mounting plate, and the upper surface of the mounting plate is formed as a slope inclined downward toward the open portion of the guide wall. The vacuum cleaner according to claim 6, wherein 8. The vacuum cleaner according to claim 7, wherein a gap is provided between an end face of the connecting plate side connecting portion fitted in the guide wall and an upper face of the mounting plate of the pin electrode. 9. The electric vacuum cleaner according to claim 6, wherein the hole for inserting the pin electrode formed in the end face of the connecting plate side connecting portion is formed in an elliptical shape having a major axis in the center direction of the upper case.