JPH052532Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field This invention relates to a reel locking device in a cord winding device used in various electrical devices.

(2) Prior Art As this type of reel locking device, there is, for example, Japanese Utility Model Publication No. 57-23421 proposed by the present applicant, which is located near the periphery of the reel 52 as shown in FIG. An arrow-shaped protrusion 58 consisting of a hook-shaped head 56 and an arc-shaped tail 57 is attached to the surface opposite to the winding surface of the cord, while a locking claw 59 is attached to the bottom wall of the case 51. It is arranged facing in the radial direction, its base end is pivotally supported by a pin 60, and the locking claw 5
The tip of 9 is positioned so as to abut against the protrusion 58. The locking pawl 59 is always urged as shown in the figure by a U-shaped spring 61 held by a rod-shaped and U-shaped projection 65 provided on the bottom wall of the case 51, and this U-shaped A protrusion 63 is provided in the middle of one side of the spring 61 with which a protrusion 62 provided at the rear end of the locking claw 59 engages when the locking claw 59 swings counterclockwise. .

(3) Problems to be solved by the invention By the way, in the conventional locking device, apart from the projection 58 on the reel 52 side, there is a locking pawl 59 that abuts the projection 58 on the case 51 side, and a locking claw 59 that abuts the projection 58 on the case 51 side. Since the U-shaped spring 61 that biases the retaining pawl 59 is a separate component, the structure becomes complicated and the manufacturing cost increases.

Therefore, the object of this invention is to provide a reel locking device that has a simple structure and can be manufactured at low cost by reducing the number of parts on the case side.

(4) Means for solving the problem In order to achieve the above-mentioned object, this invention has a cord on the surface of the reel or on the bottom wall of the case near the outer periphery of the reel and opposite to the winding surface of the cord. An arc-shaped projection having an engaging part on the front surface in the drawing direction and a locking part on the rear surface is provided, and a leaf spring-like locking member is provided on the bottom wall of the case or the surface of the reel that overlaps the projection on the circumference. The stopper is provided such that an intermediate portion thereof is held by a holding portion, and both end portions extend in an arc shape so as to be able to abut against the protrusion and are slidable in the circumferential direction;
When the reel rotates in the biasing direction with one end of the reel opposite to the biasing direction abutting against the surface of the reel or the bottom wall of the case, this locking stopper rotates in the biasing direction.
The one end is engaged with the locking part of the protrusion and slid, and this sliding causes the other end to abut against the surface of the reel or the bottom wall of the case, and the reel moves in the opposite direction to the urging direction. The one end portion that is locked and released from the locking portion is configured to be displaced outward so that it does not lock with the locking portion due to the restoring force of the spring. do.

(5) Operation When the cord is pulled out, the reel rotates, and as the reel rotates, the other end of the stopper comes to engage with the engaging part of the protrusion, and the stopper is pushed along the holding part. be slid. This sliding disengages the other end of the stopper from the engaging portion, so that the cord wound around the reel is then pulled out to a desired length. Next, when the cord is stopped being pulled out, the reel is rotated in the opposite direction by the biasing force, the cord is wound up, and one end of the stopper is locked in the locking part of the protrusion due to the reverse rotation of the reel. In this locked state, the stopper is pushed and slid along the holding portion in the opposite direction. Then, the reel stops rotating in reverse, and the cord is no longer wound. When the cord is pulled out again in this state, one end of the stopper, which is released from the locking part of the protrusion, is displaced outward so that it does not lock with the locking part due to the spring restoring force. , which causes the reel to spin backwards again and the cord to be fully wound onto the reel.

(6) Embodiment In Figs. 1 to 3, 1 is a case, in which a reel 2 is installed rotatably and biased in one direction by a spring 4, and a cover is provided on the surface of the reel 2. 5 is coated. A locking stopper 7 in the form of a leaf spring of a predetermined length is held near the outer peripheral edge of the reel 2 on the surface of the reel 2 on the side opposite to the cord winding surface, and the intermediate portion is held by a holding portion 8. Further, both ends extend in an arc shape and are slidably provided so as to be able to abut against the bottom wall of the case 1. The holding part 8 consists of a rectangular opening bored in the reel 2 and a holding piece 11 provided in the radial direction in the middle of the opening. The stopper 7 is held at both side edges of the stopper 7. 13 is an arcuate guide provided on the surface of the reel 2 along the sliding direction of the stopper 7, and 15, 15' are guides 1 provided at predetermined intervals on the inner surface of the stopper 7 facing the bottom wall of the case 1. A holding piece 11 is provided with a pair of locking protrusions to prevent the stopper 7 from coming off from the holding part 8 when the stopper 7 slides.
It is possible to engage with one side edge or the other side edge of.

15 is a cord wound on the surface of the reel 2 opposite to the spring 4, and a plug (not shown) is attached to one end pulled out from the outlet (not shown) of the case 1.
is installed. The other end of the cord 15 is drawn into a cylindrical wall 17 provided around the central axis 16 on the surface through an opening (not shown) and connected to a pair of brushes (not shown).

An arc-shaped protrusion 20 is provided at a position on the bottom wall of the case 1 that overlaps the stopper 7 on the circumference, and an engagement stepped portion 21 is provided on the front surface of this protrusion 20 in the cord pulling direction, and a locking recess is provided on the rear surface of the protrusion 20. 22 is formed.

Next, the operation of the above embodiment will be explained with reference to FIG.

When the cord 15 is pulled out against the urging force of the spring 4, the reel 2 rotates in the direction of the arrow. This rotation of the reel 2 causes the other end of the stopper 7 to move into the protrusion 20.
(FIG. 4A), and the stopper 7 that has engaged with this engaging step 21 is pushed and slid to the left in the drawing along the holding part 8. . Then, when the engagement protrusion 15 of the stopper 7 comes to be located near the holding piece 11, the stopper 7
Since the engagement between the other end and the engagement stepped portion 21 is disengaged (FIG. 4B and C), the cord 15 wound around the reel 2
is then pulled out to the desired length. When the cord 15 is stopped being pulled out when the desired length is reached, the reel 2 is rotated in the opposite direction by the biasing force of the spring 4, and the cord 15 is wound up. Due to the reverse rotation of the reel 2, one end of the stopper 7 that abuts on the bottom wall of the case 1 comes to be locked in the locking recess 22 of the protrusion 20 due to the sliding, and in this locked state, the stopper 7 7 is pushed and slid along the holding part 8 to the right in the drawing. Then, when the engaging protrusion 15' of the stopper 7 comes to be located near the holding piece 11, the reverse rotation of the reel 2 is stopped.
The cord 15 will no longer be wound up (FIG. 4D).

Here, when the cord 15 is pulled out again, one end of the stopper 7 separates from the locking recess 22, and as a result of this separation, the one end of the stopper 7 released from the locking recess 22 is subjected to the spring restoring force. Therefore, it is displaced outward so that it does not lock with the locking recess 22 (FIG. 4E),
This causes reel 2 to rotate backwards again and code 1
5 is completely wound onto reel 2 (FIG. 4F).

In the above embodiment, the stopper 7 is arranged on the surface of the reel 2, and the projection 20 is arranged on the bottom wall of the case 1, but the arrangement of the stopper 7 and the projection 20 may be reversed.

In addition, the structure of the engagement step 21 and engagement recess 22 formed on the protrusion 20 and the stopper 7 that engages or locks these at the end is shown as an example, and the detailed design such as the shape may be other than the above. Also,
Although the contact method was shown as an example of a cord winding device,
It goes without saying that a non-contact type may also be used.

(7) Effects of the invention This invention is as described above, and it is possible to reduce the number of parts on the case side to only one, the locking stopper, instead of two parts as in the past. In comparison, the structure is simpler, the manufacturing is easier, and the manufacturing cost can be kept low.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing an embodiment of this invention, Fig. 2 is a longitudinal front view taken along the - line in Fig. 1, Fig. 3 is an exploded perspective view of the case and reel, and Fig. 4 is a longitudinal sectional side view showing an embodiment of this invention.
Figures A to F are plan views of main parts to explain the action, and Figure 5
The figure is a plan view of main parts showing a conventional example. 1...Case, 2...Reel, 4...Spring, 5
... Cover, 7 ... Locking stopper, 8 ... Holding section, 10 ... Opening, 11 ... Holding piece, 15 ... Cord, 20 ... Protrusion, 21 ... Engaging step, 22 ...
...Latching recess.

Claims (1)

[Scope of utility model registration request] In a cord winding device in which a cord reel is installed in a case so as to be rotatable and biased in one direction, the surface of the reel near the outer periphery of the reel and opposite to the cord winding surface or The bottom wall of the case is provided with an arcuate projection having an engaging part on the front face in the direction in which the cord is pulled out and a locking part on the rear face, and on the bottom wall of the case or the surface of the reel that overlaps with this projection on the circumference. , a leaf spring-shaped locking stopper is provided with an intermediate portion held by a holding portion, and both ends extending in an arc shape so as to be able to abut against the protrusion and to be slidable in the circumferential direction; When the reel rotates in the biasing direction with one end on the opposite side of the reel in the biasing direction abutting against the surface of the reel or the bottom wall of the case, the one end of the locking stopper touches the protrusion. When the reel is rotated in the opposite direction to the urging direction with the other end abutting the surface of the reel or the bottom wall of the case due to this sliding, the locking part is locked and slid. A reel in a cord winding device, characterized in that one end portion which is locked and released from a locking portion is configured to be displaced outwardly from being locked with the locking portion by a spring restoring force. Locking device.