JPH0242696Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a reel locking device for a cord winding device that draws in and accommodates the cord of an electric mosquito repellent or the like using a spring force.

BACKGROUND TECHNOLOGY Conventionally, a reel locking device that pulls out a cord to a desired length and locks it at that position has been developed
There is one shown in No. 57-23421. In this conventional example, the U-shaped spring that restricts the movement of the locking pawl is manufactured on the side of the reel that pivotally supports the locking pawl.

Problems to be solved by the invention In the conventional system described above, the locking pawl and the spring that restricts the movement of the locking pawl must be installed separately in the reel, which reduces the number of man-hours required to assemble the reel. There was a problem above.

Means and Effects for Solving the Problems The present invention was developed in view of the above, and it is possible to assemble the locking spring, which is a small installation part, and the locking pawl, which is also a small installation part, in a previous process. This invention provides a reel locking device for a cord winding device that can reduce the assembly process of small parts to the reel, which is a large assembly component, and shorten the assembly time of the entire cord winding device. Its structure is such that a reel is rotatably mounted on a fixed bottom and is biased in one direction by a spring, and near the periphery of the reel on the fixed bottom, the reel has circular arc diameters of different sizes and steps. A protrusion having two arcuate surfaces connected at one end is erected with the smaller diameter arcuate surface located on the downstream side in the winding direction of the reel, and a wedge-shaped locking pawl is provided on the reel. be rotatable and with the tip of the locking pawl facing in the radial direction of the reel, and the tip of the locking pawl is provided at a position where it interferes with the protrusion, and the locking pawl is provided on the outside of the base of the locking pawl. A locking spring formed in a wave shape in the rotational direction is disposed on the reel, and the locking claw is attached to the reel in such a position that the locking pawl rotates in the winding direction and its tip comes into contact with the stepped portion of the protrusion. The locking claw is engaged, and from this state, the locking pawl rotates slightly in the pull-out direction, and when its tip is in contact with the step, it disengages from the locking spring and comes into contact with the side surface of the locking spring. The tongue piece that urges the locking pawl in the pull-out direction and the locking pawl rotate in the pull-out direction and the tip comes into contact with the circular arc surface on the small diameter side and abuts against the locking spring to lock it. It has a configuration in which a stopper that biases the pawl in the winding direction is installed upright, and the locking pawl and the locking spring are assembled in a separate process from the assembly process of assembling the reel to the fixed bottom.

Embodiment Hereinafter, an embodiment in which the reel locking device in the cord winding device according to the present invention is applied to an electric mosquito repellent will be described based on the drawings.

In the figure, 1 is a fixed bottom, 2 is a fixed lid attached to the upper side of this fixed bottom 1, 3 is a reel rotatably supported in the fixed bottom 1 with a support shaft 4 as a fulcrum, and 5 is this reel 3 The rotary lid 5 is attached to the upper side of the fixed lid 2, and the rotary lid 5 faces upward from a hole 2a provided in the center of the fixed lid 2. A heating element 6 is fixed to the center of the upper surface of the reel 3, and a fumigation window 5a corresponding to the heating element 6 is provided on the rotary lid 5, and an insecticide is impregnated through this fumigation window 5a. The mat is inserted onto the heating element 6.

A body portion 8 is provided on the lower surface of the reel 3,
A cord 9 whose one end is connected to the heating element 6 is connected to the body 8.
is being wound. The cord 9 is drawn out in the tangential direction of the winding vortex from an outlet 10 opened on the side surface of the fixed bottom 1.

The reel 3 is biased by a spiral spring 11 in a direction to wind up the cord 9. The reel 3 rotates counterclockwise when viewed from above, thereby winding the cord 9, and is biased by a spring in the same direction.

A support shaft 12 is provided protruding from the upper surface of the reel 3 and on the outer side in the radial direction, and a locking pawl 1 is attached to the support shaft 12.
3 is rotatably supported. On the other hand, at an inner corner of the fixed bottom 1 and near the periphery of the reel 3, a protrusion 14 with which the locking pawl 13 is removably engaged is provided.

The protrusion 14 has two arcuate surfaces 14a and 14b having different arc diameters formed on the inner surface in the radial direction of the reel 3, and a stepped portion 1 is formed between the two arcuate surfaces 14a and 14b.
It is 4c. These two arcuate surfaces 14a, 1
4b, the small-diameter circular arc surface 14a is located on the downstream side in the winding rotation direction of the reel 3.

The locking claw 13 has a stepped portion 14c of the protrusion 14,
A key-shaped locking portion 13a that engages in a direction to prevent rotation of the reel 3 in the winding direction is provided. It is longer than the distance from the locking claw axis to the large diameter side circular arc surface 14b when the axis and the large diameter side circular arc surface 14b of the projection 14 are aligned in the radial direction, and this tip is Large diameter side arc surface 14b
The locking portion 13a abuts against and engages with the stepped portion 14c of the projection 14 and a part of the arcuate surface 14a on the small diameter side while being in contact with and tilted in the winding direction of the reel 3.

A plate-shaped locking spring 15 formed in a waveform in the direction of rotation of the locking pawl 13 is attached to the side surface of the boss portion of the locking pawl 13 . As shown in FIG. 1A, this locking spring 15 has both ends releasably engaged with grooves 13b and 13c on the back side of the locking pawl 13 and on both sides in the direction of rotation. It is now being installed by

On the upper surface of the reel 3 and near the spindle 12 that supports the locking pawl 13, a tongue piece 16 is provided on the upstream side in the winding direction of the reel 3, and a stopper 17 is provided on the downstream side.

The tongue piece 16 corresponds to the locking spring 15, and the locking pawl 13 is aligned in the winding direction (counterclockwise direction) of the reel 3.
The tip of the locking portion 13a engages with the protrusion 14.
It faces the arcuate surface 14b on the larger diameter side with a gap therebetween, and engages with the locking spring 15 as shown in FIG. It is designed to hold. At this time, the tongue piece 16 is also slightly elastically deformed together with the locking spring 15.

On the other hand, the stopper 17 is operated as shown in FIG. The lock spring 15 is brought into contact with the side surface of the lock spring 15 to deform the lock spring 15 in a counterclockwise direction.

Only the proximal end of the tongue piece 16 is integrally connected to the reel 3, and the other portion is separated from the reel 3 by the hole 3a.

The operation of the above configuration will be explained based on FIGS. 4 to 11.

The locking pawl 13 when the reel 3 is rotated in the winding direction (counterclockwise) by being biased by the mainspring spring.
is as shown in FIG. 4, and the locking pawl 13
Does not interfere with 4. However, the locking claw 13 is
4, the side surface of the locking spring 15 contacts the stopper 17, and the locking claw 13
Since the locking claw 13 is biased counterclockwise, each time the locking claw 13 is disengaged from the protrusion 14, the locking claw 13 is rotated to a position in which the tip protrudes to the side of the reel 3, as shown in FIG. .

When the cord 9 is pulled out, the reel 3 rotates in the pulling direction (clockwise) against the urging force of the mainspring spring 11. At this time, the locking pawl 13 contacts the projection 14 and rotates counterclockwise as shown in FIGS. 6 and 7, and the locking pawl 13 does not interfere with the projection 14. However, at this time, the locking claw 13 is in a position where the tip of the locking claw 13 interferes with the circular arc surface 14a of the small diameter portion of the projection 14, as shown in FIG. When the reel 3 rotates clockwise, the locking spring 15 and the locking claw 13 are biased as shown in FIG. The tongue piece 16 is slightly elastically deformed.

When the cord 9 is pulled out to a predetermined length and the cord 9 is released, the reel 3 is returned counterclockwise by the mainspring spring 11. At this time, since the locking pawl 13 is configured as shown in FIG. 8, when the reel 3 rotates counterclockwise, the tip end 13a of the locking pawl 13 is moved against the step of the protrusion 14, as shown in FIG. Part 14c
engage with.

When the reel 3 further rotates counterclockwise from this state, the locking pawl 13 is rotated clockwise by the stepped portion 14c of the protrusion 14. The locking claw 13 in this state becomes as shown in FIG. 10, and the locking claw 13
The key-shaped part of the locking part 13a is the stepped part 14 of the protrusion 14.
c and a part of the circular arc surface 14a on the small diameter side,
The force of the locking pawl 13 is supported by the entire protrusion 14 via the stepped portion 14c. Further, at this time, the locking spring 15 of the locking pawl 13 is removed from the tongue piece 16, but the locking pawl 13 is in contact with the tongue piece 16 and is spring-biased clockwise.

In the above state, the reel 3 is locked against the biasing force of the mainspring spring 11.

To wind the cord 9 again from the above locked state,
It can be wound up by pulling out the cord 9 a little and then letting go.

That is, when the cord 9 is pulled and the reel 3 is slightly rotated clockwise from the state shown in FIG. 10, the state shown in FIG. It is urged to rotate clockwise and becomes free. When the reel 3 rotates in the winding direction (counterclockwise) in this state, the locking pawl 13 becomes as shown in FIG.
does not interfere with the protrusion 14.

In the above embodiment, the tip 13a of the locking pawl 13 is formed into a key shape, and this tip 13a is attached to the protrusion 1.
Step portion 14c of No. 4 and arcuate surface 14 with smaller arc diameter
Although the example in which the tip portion 13a abuts on the tip portion 13a is shown, the shape of the tip portion 13a may be made into an acute angle shape as shown in FIG.

Furthermore, the locking spring 15 is not limited to a plate-like material, and may be made of a wire-like material.

Effects of the invention According to the invention, the locking spring 15 for regulating the movement of the locking pawl 13 is provided in a groove on one side of the base of the locking pawl 13 and on both sides of the base of the locking pawl 13. 1
3a and 13b, the locking spring 15, which is a small installation part, and the locking pawl 13, which is also a small installation part, can be assembled in the previous process, and therefore the assembly is a large part. The number of assembly steps for small parts on the reel 3 can be reduced, and the assembly time of the entire cord winding device can be shortened.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a plan view showing the main parts, Fig. 1A is an exploded rear view of the locking claw, Fig. 2 is a longitudinal sectional view, and Fig. 3 is an electric mosquito. FIGS. 4 to 11 are perspective views of the taker, FIGS. 4 to 11 are explanatory views of the main parts in the embodiment of the present invention, and FIG. 12 is a view of another example of the locking claw. 1 is a fixed bottom, 3 is a reel, 13 is a locking claw, 14
14a and 14b are arcuate surfaces, 14c is a stepped portion, 15 is a locking spring, 16 is a tongue piece, and 17 is a stopper.

Claims (1)

[Scope of utility model registration request] The reel 3 is provided on the fixed bottom 1 so as to be rotatable and biased in one direction by a spring, and near the periphery of the reel 3 on the fixed bottom 1, there are two reels having different arc diameters and connected by a stepped portion 14c. A protrusion 14 having arcuate surfaces 14a, 14b is erected with the arcuate surface 14a on the smaller diameter side of both the arcuate surfaces 14a, 14b positioned downstream in the winding direction of the reel 3, and
A wedge-shaped locking pawl 13 is rotatably provided, with the tip of the locking pawl 13 facing in the radial direction of the reel 3, at a position where the tip interferes with the protrusion 14, and the locking pawl 13 Grooves 13b and 13c are provided on one side of the base of the base and on both sides in the direction of rotation of the locking spring 15, and both ends of the locking spring 15 are formed in both grooves 13b and 13c in a waveform in the direction of rotation of the locking claw 13. A locking spring 15 is attached to the reel 3 in such a position that the locking pawl 13 rotates in the winding direction and its tip abuts against the stepped portion 14c of the protrusion 14. , and from this state, the locking pawl 13 rotates slightly in the pull-out direction, and when its tip comes into contact with the stepped portion 14c, it disengages from the locking spring 15 and the side surface thereof. a tongue piece 16 that comes into contact with and urges the locking pawl 13 in the pull-out direction;
A stopper 17 is provided which abuts the locking spring 15 and urges the locking pawl 13 in the winding direction when it rotates in the drawing direction and its tip abuts against the circular arc surface 14a on the small diameter side. A reel locking device for a cord winding device, characterized in that: