JPS63288120A - Upright type electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a self-propelled upright vacuum cleaner.

(b) Conventional technology In this type of upright vacuum cleaner, for example, Japanese Utility Model Publication No. 54-23176 and Japanese Utility Model Publication No. 57-21643 disclose a sliding mechanism on a handle pipe portion rotatably pivoted to the main body. Disclosed is a self-propelled device that is equipped with a flexible handle and that allows the main body to move forward and backward by operating a forward and backward movement control switch attached to the handle pipe in conjunction with the forward and backward sliding of this handle. has been done. However, in the former case, when the handle is slid back and forth, the motor changes forward and backward instantly by switching the control switch, so the overload caused by the back electromotive force is not applied to the switch, which can cause a malfunction. There are drawbacks. So, like the latter, by using a variable resistor to lower the voltage applied to the motor during forward and reverse rotation, it is possible to generate a back electromotive force. Because current flows through it, it cannot withstand long-term use, and when the handle is slid instantaneously to switch between forward and backward movement, the forward and reverse rotation motor is reversed before it stops, which generates a back electromotive force. The drawback is that the back electromotive force can cause malfunctions of electrical components such as burn-in of switch contacts.

(C) Problems to be Solved by the Invention The present invention is designed to prevent the IIT current caused by the back electromotive force of the forward/reverse rotation motor from being applied to electrical components such as switches when switching between forward and reverse motion by sliding the handle back and forth. The purpose is to provide an upright vacuum cleaner with improved reliability and no breakdown of electrical components.

(d) Means for solving the problems The upright vacuum cleaner of the present invention is shown in Figs.
As shown in FIG. mouth(
3), a dust collecting part (19) that collects dust sucked in from the main body (1), a floating handle vibe (10) rotatably attached to the rear of the main body (1), and a handle vibe (10) that slides on the handle vibe (10). A movably equipped handle (20) and the handle vibe (
10) and a forward switch (23) and a reverse switch (24) that are provided in the handle (20) and control the forward/reverse rotation of the forward/reverse rotation motor (14) in conjunction with the sliding of the handle (20);
The operating protrusion (22) provided on the handle (20) for operating the forward/reverse switch (23) (24), and the operating protrusion (22>) that operates the forward/reverse switch (23>(
Slow speed mechanism (27) that lengthens the time between 24>
This configuration is characterized by having the following. As shown in FIG. 1, this slow speed mechanism (27) has an operating protrusion (
It consists of a slot (28) provided in the center of the ball (22) and a ball (31) pressed by a spring (30).
) is inserted into the slot (28) once to slow down the speed, and as shown in Fig. 6, the handle vibe (10 ) and the handle 20.
), and a ball (34) fitted between the spiral groove (32) and the circumferential groove (33). (34) moves in the spiral circumferential groove (32), so that the operating protrusion (22) moves forward/reverse switch (23) (24).
), the sliding speed of the handle (20) is slowed down near the middle of the handle (20), as shown in FIG.
Magnet (35) attached to O) and fA pole magnet (36)
When the operating protrusion (22) is located in the middle, the handle (20) faces the inside of the handle (20) and the 5%
A magnet (37) with the same polarity as the handle vibe magnet (35) is placed inside the handle (20) at the front and back positions in the axial direction of the polar magnet (36).
There is a configuration in which (37) is attached to make use of magnetic repulsion and attraction to slow down the speed.

(e) Function With the above structure, the main body (1) can be moved forward or backward by switching the forward/reverse switch (23>(24) as the handle (20) slides back and forth. The slow speed mechanism (27) is activated when the handle (20) is slid, and the time during which the operating protrusion (22) of the handle (20) is located between the forward/reverse switch (23>(24>) becomes longer; Therefore, the time to turn off the power supply to the forward/reverse rotation motor (14) becomes longer, and after the t current due to the back electromotive force generated as the motor (14) transitions from rotation to stop has disappeared or greatly decreased. The rotation of the motor 114) is reversed, so that the flow of electricity caused by the reverse rotation is greatly reduced, and there is no possibility of current flowing into electrical components such as switches and causing malfunctions when switching between forward and forward travel.

(f) Example Hereinafter, the configuration of the upright vacuum cleaner of the present invention will be explained based on an example shown in the drawings.

(1) is a main body that is placed on the floor, and is equipped with a floor suction port (3) on which a rotating brush (2) is pivoted in the front part, and an electric blower (4) that communicates with this suction port (3). ) is built-in.
The rotating shaft of this electric blower (4) and the rotating brush (2)
A belt (not shown) or the like is used to bridge the space between the rotary brush (2) and the rotary brush (2), which is rotated by an electric blower (4). In addition, the front axle (
5), and an axle (7) on which driving wheels (6) are rotatably supported at the rear. (8) is a main body cover that covers the upper part and im side of the main body (1).

(9) is a handle vibe part rotatably attached to the rear part of the main body (1), and the handle pipe part <9> includes a handle vibe (10) and two parts at the bottom of the handle vibe (10). a forked pivot arm <11) and a hood reel case (12) attached to the handle pipe (10)
A pair of rotating pivot parts (13) at the lower end of the pivot arm (11) are loosely inserted into the axle (7>) and pivotally attached to the cord reel case (12). A food reel (not shown), a forward/reverse rotation motor (14) for drive car #1, and a reduction gear mechanism (15) for decelerating the rotation of the motor (14) are housed inside.

(16) is from the reduction gear mechanism (work 5) to the wheel (6).
), which meshes with the front 21st gear gear mechanism (15) and the chain meshing gears (17) and (18) that are pivotally attached to the axle (7). ! ! It is suspended.

(19) is the collection Jl attached to the rear of the main body (1)!
One part consists of a bag body, communicates with the electric blower (4), and collects dust sucked in from the suction port (3) by the electric blower (4).

(20) is a handle provided at the upper end of the handle pipe (10) so as to be slidable a certain distance back and forth in the axial direction, and a notch hole (21
) to the operating prong g6 (22>) to the handle vibe (10)
protrudes inward.

(23) and (24) are R11 advance switch / switch and reverse switch provided in the handle vibe (10) facing each other in the axial direction, and when the handle (20) is slid forward or backward, the The protrusion (22) is connected to the tiii switch (2).
3) Or the operation part of the reverse switch (24) <23
') or (24') to activate the corresponding switch. The handle (2o) is formed by supporting the shaft (25) passing through the handle vibe (work 0) in the center of the spring (26).
2o), the protrusion (22) is held between the forward switch (23) and the backward switch (24) to maintain a neutral position.

(27) is the forward switch (23) and the reverse switch (
24) is a slow speed mechanism provided in order to prolong the time for holding the protrusion (22), and this slow speed! a4fI
! (27) is located between the slot (28) provided in the center of the operating protrusion (22) of the handle (2o) and the forward/backward switches (23) and (24) as shown in Figure 1. A cylindrical body fixed to the handle vibe (1o) (consisting of a ball (31) pressed in the direction of the operating protrusion (22) by a spring (3o) housed in the handle vibrator (2), During sliding, the ball (31) once enters the slot (28) and then pops out, thereby slowing down the sliding speed.

As shown in FIG. 6, this speed reduction mechanism (27) is constructed by comparing the inclination angle (A) of both end portions (32a) (32a) with respect to the circumferential direction to the inclination angle CB of the central portion (32b) with respect to the circumferential direction. Steep and handle vibe (lO)
A spiral circumferential groove hole (32) provided on the outer surface of the handle and a handle (2
F1 circumferential groove (33) recessed in the circumferential direction on the inner surface of 0), and a ball loosely fitted between the spiral circumferential groove (32) and the circumferential groove (33). It consists of (34) and
As the handle (20) slides, the ball (34) moves within the spiral circumferential groove (32), so that the operation protrusion (22) moves the forward/reverse switch (23) (2).
4) The sliding speed of the handle (20) may be slowed down near the middle position.

In addition, as shown in FIG. 7, the slowing mechanism (27) has a magnet (35) attached to the handle vibe (lO), and the operating protrusion (22) is connected to the forward/reverse switch (23) (
24) The magnet 1' is housed on the inner surface of the handle (20) so as to be attracted when it is in the intermediate position. Stone (3
6) Grinding with the same polarity as the magnet (35) of the handle vibe (10) attached to the inner surface of the handle (20) at the front and rear positions in the axial direction.

It may be configured to consist of stones (37) and (37), and to slow down by using magnetic repulsion and attraction.

FIG. 5 is an electrical circuit diagram with no force applied to the handle (20), in which (38) is a commercial power source, (
39) is a main TG switch that simultaneously turns on and off the power supply to the electric transmission R machine (4) and the forward/reverse rotation motor (14), (40) is a rectifier diode, and (41) is a smoothing capacitor. The normally closed contacts <23a) (24a) of the forward switch (23) and reverse switch (24) are connected to the positive electrode of the rectifier diode (40).
) and the normally closed contact (23b) of the reverse switch (24) (2
4b) is connected to the negative electrode of the t/f diode (40) on the surface 5.
The forward switch (23) and the reverse switch (24>) have switching switches (23c) <24C) that are connected to the forward/reverse rotation motor (1).
4) are all connected.

With the above configuration, when the user turns on the main single source switch (39), the front '&! ,! Power is supplied to the dynamic blower (4) and the forward/reverse rotation motor (14), but since the handle 20) maintains the neutral position, the forward/reverse rotation motor (14) does not rotate. ) forward, the changeover switch (23c) of the forward switch (23) changes to the normally closed contact (
23b) to the normally open contact (23a), the forward/reverse rotation motor (14) rotates in the forward direction, and this rotational driving force is transmitted to the wheels (6) via the chain (16) and the main body (
1) moves forward. When the handle (20) is pulled and slid backward to switch from the forward drive state to the reverse drive state, the changeover switch (OC) of the reverse drive switch (24) changes to the normally closed contact <24b.
) switches to the normally open contact (24a), and current flows through the forward/reverse rotation motor <14) in the opposite direction to the above, causing it to rotate in the opposite direction, the wheels (6>) also to reverse, and the main body (1>) to move backwards. .

When switching from forward movement to reverse movement or from reverse movement to forward movement, the sliding speed of the handle (20) is controlled by the forward/reverse switch (23) (
The time required to pass through the intermediate position t (neutral position f) of
), the rotational speed decreases significantly or stops once, and then reverses, so the current due to the back electromotive force decreases or disappears before the motor (14) reverses, and therefore an excessive current flows to the switch contact at the time of switching. Since there is no flow, electrical equipment failures such as burn-in of switch contacts do not occur.

()・)Effects of the Invention According to the present invention, when the handle is switched between forward and reverse by sliding, the time during which the operating protrusion of the handle is between the forward and reverse switches is lengthened by the slow speed mechanism. During this time, the overcurrent caused by the back electromotive force generated in the forward/reverse rotating motor disappears or is greatly reduced, so no overcurrent flows to the switch contacts during switching, and therefore electrical components such as switch contacts are damaged due to overcurrent. It is possible to obtain a highly reliable upright vacuum cleaner without any failures.

[Brief explanation of the drawing]

The drawings all relate to the upright vacuum cleaner of the present invention,
Figure 1 is a sectional view of the main part of the handle, Figure 2 is a side view, and Figure 3 is a cross-sectional view of the main part of the handle.
The figure is a cross-sectional side view of the main part, with two points S! 4m shows the rotating state of the handle vibe part, 4th @ is a bottom view, 5rXJ is an electric circuit diagram, and Figure 6 is a diagram of the handle part of another example (A) (B)
150. is the main part lr surface 150. which shows the operating state. (c) is a perspective view of the handle pipe, (d) is a sectional view taken along line XX of (a), and FIG. 7 is a sectional view of a main part of the handle portion of still another example. (1) Main unit, (4) Electric blower, (10)
...Handle pipe, (14)...Forward/reverse rotation motor, (23)...Forward switch, (24)...Reverse switch, (27)...Slow speed am.

Claims (1)

[Claims] (1) A main body equipped with a floor suction port, an electric blower, and wheels driven by a forward and reverse rotation motor, a dust collection section that collects dust sucked in from the suction port by the blower, and a rear part of the main body. a handle pipe rotatably attached to the handle pipe; a handle slidably mounted on the handle pipe; A forward switch and a reverse switch that switch and control reverse rotation, an operating protrusion provided on the handle that operates the forward/reverse switch, and a time period during which the operating protrusion is located between the forward/reverse switch. An upright vacuum cleaner characterized by having a slow speed mechanism that lengthens the time.