JPS5934349Y2 - Automatic rotation device for brush body of brush with handle - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic rotating device for a brush body in a brush with a handle, which has directionality due to countless short raised bristles lying in one direction.

A device for changing the direction of the brush body of a dust removal brush by 180 degrees by pressing a direction change lever is disclosed in Japanese Patent Application Laid-open No. 42-2.
No. 0359 is known.

In this device, when the direction change lever is pressed toward the handle side of the main body, a pair of convex parts provided on the protrusion of the rotary plate are pressed by a pair of convex parts formed at the tip of the direction change lever, and the brush body Remove it from the main body and lower it to the left about 160 degrees.
- When the next rotation is made and the pressure on the direction change lever is released, the repulsive force of the lever return spring pushes up the convex part of the lever, and at the same time, the repulsive force of another spring pushes up the sloped part of the rotating plate into the convex part of the main body. Push the brush body with one end on the left front side and one end on the right side of the rear side to move the brush body to the left by about 20 degrees.
This relates to a two-stage rotation system that performs secondary rotation.

However, in this device, the brush body is simply a shallow recess formed inside the slope of the rotating plate, which is engaged with a low protrusion formed in an elliptical shape on the lower surface of the main body. Therefore, the locking is uncertain, and a lever return spring is an essential component in order to perform secondary rotation.

Furthermore, in the direction change device, even if a primary rotation of around 160° can be performed, when the pressure on the direction change lever is released, it is difficult to completely perform the remaining secondary rotation of around 20°. Store your shortcomings.

The present invention differs from this in that the brush body and the holder are engaged by deeply and reliably engaging the protrusions protruding from the brush body in the engagement groove between the cam walls extending half way around the holder. Automatic rotation of the brush body of the brush with a handle, in which the upper end of the protrusion rides on each high end of the cam wall for half the circumference by pressing the operating lever, and the brush body can be rotated 180 degrees in one step. The purpose is to provide equipment.

To explain the embodiment shown in FIGS. 1 to 9, a brush body 4 with raised bristles slanted in one direction (direction of arrow a in FIG. 2) is attached to a brush holder 2 having a handle 1.
is pivoted to the holder 2 so as to be movable up and down by disposing a pressure spring 8 on the shaft 5 protruding from the holder 2 inside a hollow boss-like part 7 protruding above the central part of the back plate 6. ,
The spring 8 is actuated between the top plate of the boss-shaped portion 7 and a spring seat 9 attached to the lower end of the shaft 5 to bias the brush body 4 toward the holder 2 side.

At this time, the peripheral wall edge 11 of the shell portion 10 of the holder 2 fits into the inner periphery of the annular wall 12 formed at the peripheral edge of the back plate 6 of the brush body 4, and the brush body 4 is stably seated on the holder 2. That's how it is.

Next, on the holder 2, a cam wall 13 having a radius larger than the boss-shaped portion 7 of the brush body 4 and extending halfway around the shaft 5 is provided.
a and 13 b to protrude toward the brush body 4 side,
Descending slopes 14 a and 14 b that are inclined in the same circumferential direction are formed at the protruding ends of each of the cam walls 13 a and 13 b.

When the brush body 4 rotates, each cam wall 13a, 1
When the brush body 4 is stably seated on the holder shell portion 10, the respective descending slopes 14
Adjacent high end portions 15 a, 15 of a, 14 b
b and the locking groove 1 between the lower ends 16 a and 16 b
Plate-shaped protrusions 18a and 18b are provided to protrude so as to fit into the plate-shaped protrusions 7 and 17, and lower protrusions 19a and 19b are integrally formed on the extension line of the plate-shaped protrusions 18a and 18b. Form.

On the other hand, the operating lever 20 is inserted into the shell 10 through the opening 23 provided in the rear peripheral wall of the shell 10 of the holder 2, and the upper edge of the opening 23 is used as a fulcrum, and the fulcrum notch of the operating lever 20 is attached to the upper edge of the opening 23. 3 and 4.
As shown in the figure, the tip portion 2 of the operating lever 20 is divided into two.
1 a and 21 b, each protrusion 19 a of the boss-like portion 7
, 19b, and when the brush body 4 is rotated, the rotational force for causing the upper end of each protrusion 18a, 18b to ride on each higher end 15a, 15b of each descending slope. Pressure slope 2 to give F1
2 a and 22 b are formed.

In this case, if the brush body 4 does not rotate, the tip end portions of the tips 21a and 21b are formed into a downwardly bent pressing slope 22a and an upwardly bent pressing slope 22b, respectively. As shown in FIG. 2, the protrusions 19 a and 19 b are positioned at the upper ends of the corresponding protrusions 19 a and 19 b, respectively.

If you now hold the handle 1 and pull up the operating part 25 of the operating lever 20 with the fingers of the same hand, each of the pressing slopes 22 of the tips 21 a and 21 b of the lever 20 will move due to the principle of leverage.
Since the downward force F2 exerted by the protrusions 19a and 22b acts to press the protrusions 19a and 19b downward, the protrusions 18a that have been engaged in the locking grooves 17 and 17.

18b is gradually coming down.

In this case, at the same time as the component force F2 that pushes down each of the protrusions 19a and 19b, the downwardly bent pressing slope 22a pushes the protrusion 19a toward the handle 1, producing a rotational force F1. , and a pressing slope 22 bent upward.
b pushes the protrusion 19b in the opposite direction to the pressing slope 22a, and a rotational force F1 acts thereon.

However, while the protrusions 18a and 18b are engaged in the locking grooves 17 and 17, the brush body 4 moves in the direction indicated by the arrow in FIG. Since the brush body 4 cannot rotate in the direction shown in FIG.
Due to the action of the downward force F2 on a and 19b, they are only pushed down against the spring 8 as shown in FIGS. 6 and 7.

However, as a result of this, the annular wall 12 on the periphery of the brush body 4 first comes off from the shell layer wall edge 11 on the periphery of the holder 2, and
The protrusion 18a that was engaged between each of the locking grooves 17, 17
, 18b are gradually coming down.

The upper end of each protrusion 18a, 18b is connected to the locking groove 1.
7, 17 and reaches above the respective high end portions 15a, 15b, the rotational force F1, which had been suppressed by the action of the spring 8, acts, and the brush body begins to move as shown by the arrow in FIG. The protrusions 18a, 18 are rotated slightly in the direction of
b runs onto each higher end 15a, 15b of each descending slope, as shown in FIG. 8.9.

If you release your finger from the operating lever 20 in this state, each protrusion 1
Since the pressing force on 9a and 19b ceases to work, the brush body 4 is attracted to the holder 2 by the action of the spring 8, and during the operation, it rides on the high end portions 19a and 19b of each descending slope. Each protrusion 18 a
, 18b onto the respective descending slopes 14a, 14b as shown in Figures 8-9.
In addition to the component force F3 that pulls the brush body 4 towards the holder 2, the component force F4 that rotates it in the direction indicated by the arrow acts to attract the brush body 4, which was slightly downwardly away from the peripheral wall edge 11 of the holder 2, toward the holder 2 and automatically move it in the direction indicated by the arrow. The terminals 18a, 18b are then rotated 180°, and then each terminal 18a, 18b is connected to each descending slope 14a.
, 14 b toward the lower end portions 16 a , 16 b while engaging in the locking grooves 17 , 17 .

As a result of the above operations, the brush body 4 moves 180 degrees from its original direction.
Since the holder peripheral wall edge 11 fits into the inner periphery of the annular wall 12 in the reversed position, the brushing in the direction opposite to the direction of arrow a in FIG. 2 is stabilized.

Furthermore, when returning the brushing direction to its original state, the brush body 4 can be dynamically rotated 180' in the same direction with a single touch by simply repeating the lever operation to return it to its original orientation.

10 and 11 show another embodiment, in which a hollow boss-shaped portion 45 protruding from the center of the shell portion 44 of the holder 43 has a diameter smaller than that of the bottom plate 4 of the brush body 41.
The upper end collar 47 of the shaft 46 is inserted into the hollow shaft portion 42 protruding from the center upper part of the brush body 41 and is elastically fitted into the hollow shaft portion 42 on the brush body 41 side, and the bottom plate 48 of the boss-like portion 45 on the holder 43 side. In between, actuate the push spring 49 wound around the hollow shaft part 42,
The brush body 41 is pivotally attached to the holder 43 so as to be movable up and down, and is biased toward the holder 43 to form the descending slopes 50a, 5.
The cam walls 55 a and 55 b forming the 0 b also serve as the peripheral wall of the boss-shaped portion 45 .

51 a and 51 b are descending slopes 50 a and 50 b
The projections 52 a and 52 b that cooperate with the operating lever 53
These are protrusions that are pushed by pressing slopes 54a and 54b.

The operation of this embodiment is exactly the same as that in FIGS. 1 to 9, and therefore will not be described here.

As is clear from the above explanation, according to this invention,
By simply operating the lever, the brushing direction can be easily and quickly reversed dynamically with one touch, and since the lever operation can be easily performed with the fingers of the same hand holding the handle, directional inclination is possible. Using a raised brush becomes extremely convenient.

Note that the operating lever may be pivotally connected to the holder by a shaft.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of one embodiment, Figure 2a is a cross-sectional view, Figure 2 is a partial slope view showing the initial contact state of the pressing slope with the protrusion, and Figure 3 is the exploded slope. Figures 4 and 5 show the initial state of pressing the protrusion by the pressing slope, Figures 6 and 7 show the state where the protrusion has been pushed further than the state shown in Figures 4 and 5, and Figures 8 and 9 show the protrusion being pressed. A vertical cross-sectional view and a cross-sectional view of the main part showing a state in which it rides on the high end of the cam wall, FIG. 10 is a vertical cross-sectional view of the main part showing another embodiment, and FIG. 11 is a cross-sectional view of the same. be. 1...Handle, 2,43...Holder, 3...Fluff, 4.41...Brush body, 8,49... Spring, 13...Cam wall, 14a, 14b, 50a, 50b
...-downhill slope, 15 a, 15 b...
High end portion, 16a, 16b...low end portion, 17
......Latching groove, 18a, 18b, 35,
51 a, 51 b ・・・・Protrusion, 19a. 19b, 52a, 52b...Protrusion, 21a
, 21 b...,, tip, 20,53...
...operation lever, 22a, 22b, 54a
, 54b... Pressing slope, Fl, F4...
...Rotational component force, F2...Press down component force.

Claims (1)

[Scope of utility model registration request] A brush body with numerous short raised bristles lying down in one direction is pivotally attached to a brush holder with a handle so that it can move up and down, and the brush body is biased toward the holder by a spring. A cam wall protruding toward the brush body side is provided around the pivot part, and a descending slope inclined in the same direction around the circumference is formed at each protruding end, and a descending slope of each cam wall is attached to the brush body along the diameter line thereof. Protrusions that abut at symmetrical positions are provided protrudingly, and protrusions are also provided at symmetrical positions with respect to the center of rotation, and each of the protrusions is applied to the tip of the operating lever attached to the holder along with the downward force applied to the protrusions. An automatic rotation device for a brush body of a brush with a handle, which is formed with a pressing slope that provides a rotational force that causes the tip of the child to ride on the high end of the descending slope of each cam wall.