JPH052531Y2 - - 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 object, this invention provides a locking part and an engaging part on the outer periphery of the reel at separate positions, and facing the outer periphery of the reel. An arc-shaped recess with an opening on the reel side is formed on the inner circumferential surface of the case, and a plate spring-shaped locking stopper is formed in the recess, the middle part is held by a retaining wall provided in the recess, and both ends are held in the recess. The locking stopper extends so as to be able to abut against the outer circumferential edge of the reel and is housed so as to be slidable in the circumferential direction of the reel. When the reel rotates in the biasing direction with the reel in abutment with the reel, the one end engages with the locking part and slides, and this sliding causes the other end to abut against the outer periphery of the reel. In the state
When the reel rotates in a direction opposite to the biasing direction, the one end that is locked and released from the locking portion is displaced outward so that it does not lock with the locking portion due to the restoring force of the spring. It is characterized by being configured.

(5) Operation When the cord is pulled out, the reel rotates, and the rotation of the reel causes the locking part to disengage from one end of the stopper, while the locking part comes to engage with the other end of the stopper. , the stopper is pushed and slid within the recess. This sliding disengages the engagement portion from the other end of the stopper, so that the cord wound around the reel is then pulled out to a desired length. Next, when the withdrawal of the cord is stopped, the cord is rotated in the opposite direction by the biasing force, the cord is wound up, and the locking part is locked with one end of the stopper due to the reverse rotation of the reel, In this locked state, the stopper is pushed and slid within the recess toward the opposite side. 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 being locked with the locking part of the reel, is displaced outward so that it no longer locks with the locking part due to the spring restoring force. , this causes the reels to spin backwards again,
The cord is completely wound onto the reel.

(6) Embodiment In Figures 1 and 2, 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. reel 2
A locking recess 6 cut out facing the direction in which the reel is urged and a locking step 7 cut out facing in the direction opposite to the direction in which the reel is urged are formed on the outer circumferential edge of the reel, and the locking recess 6 is cut out in the direction opposite to the direction in which the reel is urged. It is installed in a certain position. Further, on the inner peripheral surfaces of the case 1 and the cover 5 facing the outer peripheral edge of the reel 2, there is an arcuate recess 8 that is open on the reel 2 side.
The case 1 and the cover 5 are each formed by a wall portion 10 that bulges out from the outer peripheral wall thereof. A retaining wall 12 is provided within the recess 8 at an intermediate position in the circumferential direction along the wall 10 and spaced therefrom.

A plate spring-like locking stopper 15 having a predetermined length is contained in the recess 8 , the middle portion of which is held by the retaining wall 12 , and both ends thereof extend from the recess 8 so as to be able to abut against the outer peripheral edge of the reel 2 . The reel 2 is housed so as to be slidable in the circumferential direction of the reel 2. 16, 16' is stopper 15
A pair of engaging protrusions are provided at a predetermined interval at an intermediate position on the inner circumferential surface of the reel 2 side, and are used to prevent the stopper 15 from sliding, and to prevent the stopper 15 from coming off the recess 8. It can be engaged with one end edge or the other end edge.

18 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 18 is pulled into the cylindrical wall 20 provided around the central axis 19 on the surface, while being held between the double walls forming the opening 21, and is connected to a pair of brushes (not shown). )It is connected to the.

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

One end of the stopper 15 is inserted into the locking recess 6 of the reel 2.
1 and 2, when the cord 18 is pulled out against the biasing force of the spring 4, the reel 2 rotates in the direction of the arrow. This rotation of the reel 2 causes the locking recess 6 to disengage from one end of the stopper 15, while the engagement step 7 comes into engagement with the other end of the stopper 15 (Fig. 3A), and the stopper 15 engaged with this engagement step 7 is pushed and slid to the left in the drawing within the recess 8. Then, when the engagement projection 16' of the stopper 15 is positioned near the retaining wall 12, the engagement between the engagement step 7 and the other end of the stopper 15 is released (Fig. 3B), and the cord 18 wound on the reel 2 is then pulled out to the desired length. When the desired length is reached, the withdrawal of the cord 18 is stopped, and the reel 2 then rotates in the reverse direction due to the biasing force of the spring 4, and the cord 18 is wound up. This reverse rotation of the reel 2 causes the locking recess 6 to lock onto one end of the stopper 15 that has come into abutment with the outer periphery of the reel 2 due to the sliding movement, and in this locked state the stopper 15 is pushed and slid to the right in the drawing within the recess 8. Then, when the engaging projection 16 of the stopper 15 is positioned near the retaining wall 12, the reverse rotation of the reel 2 stops, and the cord 18 is wound up.
8 cannot be wound any further (FIG. 3C).

Here, when the cord 18 is pulled out again, the locking recess 6 of the reel 2 separates from one end of the stopper 15, and as a result of this separation, the one end of the stopper 15 released from the locking recess 6 becomes a spring. Due to the restoring force, the reel 2 is displaced outward so that it does not engage with the locking recess 6 (FIG. 3D), and as a result, the reel 2 rotates in the opposite direction again.
The cord 18 is completely wound onto the reel 2.

In the above embodiment, the structure of the locking recess 6, the engagement step 7, and the stopper 15 that locks or engages with these at the end is shown as an example, and the detailed design such as the shape may be other than this. Furthermore, although a contact type cord winding device has been shown as an example, it goes without saying that a non-contact type cord winding device 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 plan view with the cover removed showing an embodiment of this invention, Fig. 2 is a longitudinal sectional side view of the same as above, Figs. It is a principal part top view which shows an example. 1...Case, 2...Reel, 4...Spring, 5
... Cover, 6 ... Locking recess, 7 ... Locking step,
8... Arc-shaped recess, 10... Wall, 12... Retaining wall, 15... Locking stopper, 18... Cord.

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, a locking portion and an engaging portion are provided on the outer peripheral edge of the reel at separate positions, and An arc-shaped recess with an opening on the reel side is formed on the inner peripheral surface of the case facing the outer peripheral edge of the reel, and a leaf spring-shaped locking stopper is inside this recess, and the intermediate part is held by a retaining wall provided in the recess. The locking stopper extends from the recess so as to be able to abut against the outer circumferential edge of the reel, and is housed in a slidable manner in the circumferential direction of the reel. When the reel rotates in the biasing direction with one end abutting against the outer circumferential edge of the reel, the one end engages with the locking part and slides, and this sliding causes the other end to move around the reel. When the reel rotates in the opposite direction to the urging direction while the reel is in contact with the outer peripheral edge of the reel, the one end that is unlocked and released from the locking portion is locked with the locking portion by the restoring force of the spring. A reel locking device in a cord winding device, characterized in that the reel locking device is configured to be displaced outwardly when it does not meet.