JP3505796B2 - Electric vacuum cleaner - Google Patents

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. It is related to the improvement of the section.

[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.

This will be described in more detail with reference to FIGS. 6 and 7. FIG. 6 is a vertical cross-sectional view showing a main body portion 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 from the electric vacuum cleaner main body, and FIG. 7 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 satisfy these contradictory requirements, in the conventional vacuum cleaner of the type in which the power cord is configured independently, the power cord insertion port 22 is provided on the upper surface of the upper case 3 to extend the power cord in the extending direction (tension 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.

[0005]

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 present invention has been made in view of the above points, and an object thereof is to easily attach and detach the power cord to and from the main body.
A stable connection state can be obtained during use, and the connection state can be automatically released when excessive tension is applied to the power cord.

[0007]

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 upper case, and the plug is provided near the insertion port. Holding means for detachably holding the plug of the power cord inserted into the insertion opening with a predetermined holding force is provided, and the holding means is provided with an engaging portion for detachably engaging the upper and lower cases.

Further, the plug of the power cord is arranged on the side opposite to the suction port on the peripheral side surface of the upper case, and the plug of the power cord plugged into the plug is provided in the vicinity of the plug. A holding means is provided which is detachably held by a holding force. The holding means is swingably provided on one of the upper and lower cases via a lever, and the free end side is engaged with the taper portion or the flange portion of the plug from both sides of the power cord. An engaging portion for joining the upper and lower cases by releasably engaging the free end of the wire with the other peripheral edge of the upper and lower cases. Is provided.

In addition, both ends of the wire rod are detachably supported by the lever, and a narrow portion is formed on a part of the free end side, and the narrow portion is engaged with the plug of the power cord. Is.

[0010]

In the present invention, the insertion port for the plug of the power cord is located on the side opposite to the suction port on the peripheral side surface of the upper case.
In the vacuum cleaner, the suction port side of the main body is pulled by a hose,
It is always used while being 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, when excessive tension is inadvertently applied to the power cord, the power cord is easily detached from the main body side and the connection state 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, by providing the holding means with an engaging portion for removably engaging the upper and lower cases, the holding means for the plug can have a clamping function for the upper and lower cases.

Furthermore, the insertion port of the plug of the power cord is arranged on the side opposite to the suction port of the peripheral side surface of the upper case, and the plug of the power cord inserted into the insertion port is located near the insertion port. The holding means is provided so as to be detachably held by the holding force of the holding means. This holding means is swingably provided on one of the upper and lower cases via a lever, and the free end side is a taper part or a flange part of the plug from both sides of the power cord. An engaging U-shaped wire that is bent and has a free end releasably engaged with the other peripheral edge of the upper and lower cases to join the upper and lower cases. By providing the portion, the plug holding force can be easily obtained by the spring force of the wire rod, and the upper and lower cases can be coupled by the locking portion provided at the free end of the wire rod, and the upper and lower case can be connected to the plug holding means. of It is possible to have a lamp function.

Furthermore, 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 of the wire. The narrow portion is engaged with the plug of the power cord. According to this, when excessive tension is applied to the power cord and the narrow portion of the wire is widened, the wire separates from the lever and separates from the main body together with the plug, so an excessive pushing force does not act on the narrow portion of the wire. The 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.

[0013]

The present invention will be described below with reference to the illustrated embodiments.
1 to 5 show an electric vacuum cleaner according to an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view showing the entire structure of the electric vacuum cleaner, and FIG. 2 is an enlarged view of a plug holding means which is a main part thereof. FIG. 5 is an exploded perspective view, FIG. 3 is a cross-sectional view showing an enlarged plug insertion port portion, FIG. 4 is a perspective view showing an example of a dust collecting bag, and FIG. 5 is a perspective view showing another example of a dust collecting bag. In the respective drawings, the portions corresponding to the conventional ones are designated by the same reference numerals, and the description thereof will be omitted.

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, the 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 and formed in 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 positions of the holes 37a and 37b, which are the support portions of both ends 38a and 38b of the wire 38 in the lever 37, are formed in a state in which 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 the upper and lower sides of the mouth plate 16 of the dust bag 4 and 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 this embodiment, when the female plug 36 of the power cord 34 and the holding means 31B are assembled, first, the engaging portion 38d of the wire 38 of the holding means 31B is 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 the present 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 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

[0021]

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 upper case, and the plug is inserted near the insertion port. Since the holding means for detachably holding the plug of the power cord inserted into the mouth with a predetermined holding force is provided, and the holding means is provided with the engaging portion for detachably engaging the upper and lower cases, carelessly When excessive tension is applied to the power cord, the power cord can be easily detached from the main body side, 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. In addition, the holding means can prevent the power cord from coming off the main body side due to the relatively weak tension that frequently occurs in normal use, 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, the plug holding means can have a clamp function for the upper and lower cases.

Further, 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 of the peripheral side surface of the upper case, and the power source inserted into the insertion port is near the insertion port. A holding means for detachably holding the plug of the cord with a predetermined holding force is provided. The holding means is swingably provided on one of the upper and lower cases via a lever, and the free end side tapers the plug from both sides of the power cord. Portion of the upper and lower cases, which is bent into a substantially U-shape and engages with the flange portion or the collar portion, and the free end of which is detachably engaged with the other peripheral portion of the upper and lower cases. Since the locking part for connecting the plugs is provided, the plug holding force can be easily obtained by the spring force of the wire, and the upper and lower cases can be connected by the locking part provided at the free end of the wire. Hold the holding means up and down. It is possible to provide a scan of the clamp 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, and the narrow portion is engaged with the plug of the power cord. In this way, 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 with the plug.Therefore, excessive spreading force will be applied to the narrow part of the wire. Can be prevented and its plastic deformation can be prevented. 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.

[Brief description of drawings]

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

FIG. 3 is an enlarged horizontal cross-sectional view of a plug insertion port portion that is a main portion of the present 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 vertical sectional view of a conventional electric vacuum cleaner.

FIG. 7 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 portion, 38d locking portion.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kanji Goto 1728 Omaeda Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Inside Mitsubishi Electric Home Appliances Co., Ltd. (72) Tomohisa Imai 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 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 Shinryo Electric Co., Ltd. In-house company (56) Reference JP-A-50-76854 (JP, A) Actual development 1-69447 (JP, U) Actual development 1-69448 (JP, U) Actual development 54-28967 (JP, U) Actual development 53-50166 (JP, U) Actual development 51-47569 (JP, U) Actual development 53-15658 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) ) A47L 9/26

Claims (3)

(57) [Claims] [Claim 1] have a receptacle for the plug of the power cord, electrostatic
It has an upper case with a built-in blower and a suction port.
A lower case that is detachably attached to the case to collect dust.
And a power cord inserted into the insertion port in the vicinity of the insertion port while the insertion port is disposed on the side opposite to the suction port of the peripheral side surface of the upper case. Holding means for detachably holding the plug with a predetermined holding force , and the upper and lower cases are detachably engaged with the holding means.
An electric vacuum cleaner provided with an engaging portion . 2. A has a receptacle for the plug of the power cord has a upper case having a built-in electric blower, a suction port, the upper
A lower case that is detachably attached to the case to collect dust.
In the electric vacuum cleaner having a slot, the insertion port is arranged on the side opposite to the suction port on the peripheral side surface of the upper case.
At the same time, insert it into the insertion port near the insertion port.
It is possible to remove the plug of the above-mentioned power cord with a predetermined holding force.
A holding means for holding is provided on one of the upper and lower cases via a lever.
It is movably installed and the free end side is pulled from both sides of the power cord.
Bent in a substantially U shape that engages the taper or flange of the lug
Made of a wire rod, and the wire rod has a free end
Is detachably engaged with the other peripheral edge of the upper and lower cases.
An electric vacuum cleaner provided with a locking portion for connecting these upper and lower cases . 3. A wire rod is detachably supported at its both ends by a lever, and a narrow portion is formed at a part of its free end side, and the narrow portion is engaged with a plug of a power cord.
The vacuum cleaner according to claim 2 .