KR830001143Y1 - Shanghai Dong Pulleys for Hanging Lamps - Google Patents

Abstract

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Description

Shanghai Dong Pulleys for Hanging Lamps

1 is an exploded perspective view of the various elements forming the device according to the present invention.

1A is a perspective view of the front half fuselage of the casing.

2 is an internal front view of the open device showing the rear half fuselage of the casing including a winding drum for the wires on which the lamp is suspended.

3 is an inside front view of an open device showing the front half fuselage of the casing with a seat for a metal plate that is part of the friction system of the device.

4A and 4B are perspective views of the locking ring for the electric cable to be located from the casing body to the closed sleeve inlet of the casing bottom.

5 is a partial front view of two parts of the central fixation axis of the device.

6 is a detailed front view of the winding drum with tooth detents on its side.

FIG. 7 is a front view similar to FIG. 6 shown from the side with grooves for the placement of the return spring, ie from the opposite side of the winding drum.

8 is a schematic diagram of a ratchet wheel with which the detent cooperates.

FIG. 9 is a side view of a Shanghai-dong fleece device assembled from a ceiling attachment rod and viewed from the outside.

Figure 10 is a partially cut side view showing the inside of the shanghai pulley device according to the present invention to clearly show the operation of the device.

Figure 11 is a partial detail of the casing top showing the application of a ceiling hook.

The present invention relates to a shanghai pulley device for a hanging lamp with significant structural improvement compared to the shanghai pulley device currently used for hanging height adjustable lamps.

Although only the lamp will be described here, the shanghai pulley device of the present invention may be used to support any other device that requires adjustment of the descent.

Several shanghai pulleys for hanging lamps are already known and have been used to improve useful devices, but still have some drawbacks.

The shortcomings are: noise produced by the internal mechanical elements of the device during operation, incomplete braking of the movement of the wires to suspend the lamp, such as in cables supplying current to the lamp, and high manufacturing costs due to having many factors. The lack of a universal system for attachment to the ceiling, the possibility of separation, and the destruction or departure of certain elements due to stress.

The shanghai pulley device according to the present invention eliminates these drawbacks, is formed of a limited number of elements, secured and secured, and is provided with a locking system with a butterfly screw disposed in an easily accessible position. This ensures a precise, step-by-step, precise operation without noise.

The shandong copper pulley device of the present invention has the fact that the winding drum is freely rotated in the return and rewind direction of the wire, while the winding drum is braked and controlled by the friction system in the direction of the descending ramp of the winding drum of the hanging wire. It's the kind that works with a ramp drop friction system.

One of the basic features of the Shanghai-dong pulley device according to the present invention is that a silent control mechanism is provided for the rotation of the winding drum of the wire on which the lamp is suspended. The device comprises a ratchet wheel provided with an internal crown with teeth and a tooth pawl axially axially anchored to a single central axis of the drum, The toothed pawls with elastic rods in full contact with the central fixed shaft abruptly come into contact with the teeth of the ratchet wheel during electrical release, but are able to retract without disturbing the rewinding movement in the opposite direction.

Another important feature is a friction system implemented by frictional contact between a rigid plastic ratchet wheel and a metal washer and plate surface, between which the disk surface of the ratchet wheel is driven by a thumbscrew disposed outside the casing. Gradually tightened.

Another important feature is the passage system of the electrical cable which is inserted into the closing sleeve of the casing bottom. This is achieved by verticalslots provided in the threaded bottom shelf of the casing, in cooperation with the moderately rounded surface of the casing body, and locking rings inserted in the bottom shelf between the casing body and the sleeve. Several grooves of different sizes have been prepared to have recesses to provide passages for various sizes.

A further feature is the universal shandong pulley system, which can be applied to any useful ceiling mounting system, and has a hole and screw for arbitrary application to a ring or ceiling attachment hook provided with an internally capped cap for screwing into the ceiling mounting rod. It is given by a system that joins the tops of two halves of a casing fuselage with a raised top bar.

According to an additional feature of the present invention, in order to facilitate assembly of the device and to provide symmetry, the central fixed shaft consists of two parts, one of which is inserted into the other, one of which is made of plastic material and made of plastic material. The other elements of the device cooperate with each other, for example a detent, a winding drum, a casing fuselage, etc., while the other parts are made of metal and made of other elements of the device made of metal, for example a washer and a friction system of the device. Co-operate with plates, appropriate thumbscrews to adjust friction.

In this respect the central fixation axis is very reasonable in use and function.

All these important features, advantages, and objectives of the improved shandong flip flops according to the present invention will become more apparent from the detailed description of the preferred embodiments with reference to the accompanying drawings.

Referring to some of the figures of the accompanying drawings, the shandong pulley device according to the present invention is a casing divided into two asymmetric half bodies, the front half body (1) and the rear half body (2) with respect to the suspended vertical axis. It is composed.

The casing has a threaded lower stem 3 screwed into the inner thread 4a of the sleeve 4 at the bottom thereof, which suspends the electrical cable 6 and the lamp from the sleeve 4. The wire 5 is shown.

The casing has threaded rods 7a-7b screwed to the ring 8 at the top thereof, and the ring 8 is threaded internally for screwing with the rod 10 attached to the ceiling. cop, 9).

The electrical cable 6 is freely inserted into the bottom rod 3 in the form of a single-pole lead 6a for connection to the main line through the vertical hole 11 of the threaded bottom rod 3. A plurality of grooves 14 of various sizes are revealed from the top of the slide 4 which cooperates with the provided support 13 and the overlapping bends 12 of the casing body.

Here one of the grooves is positioned to be placed in the electrical cable in such a position that coincides with the hole 11 and the bend 12. It is evident that the recess 14 is provided in a size corresponding to the size of the electrical cable 6. Inside the bottom rod 3 there is a pin 19 which serves to guide the wire 5 suspended from the device to the vertical outlet without friction. The threaded upper rod 7 of the casing consists of two half rods 7a-7b protruding from the corresponding half bodies of the casing, respectively, and the two halves of the thread when the two half bodies are joined together. Join the rods (7a-7b)

The casing has an internal fixed central axis formed of two parts 20a and 20b, the first part 20a being rearward since its fork end 41 is inserted into a dual seat 42 in the center of the casing. It is fixed to the half body (2). The fuselage of the component 20a has a central groove 24a into which the inner end of the spiral wing spring 22 is inserted, and the drum 21 having rims 45a and 45b protruding the outer end of the spring. Is inserted into a corresponding notch 43 provided on the wall of the interior chamber 44 of the chamber. The rim 45a has a hole 45c for fixing the end of the hanging wire to provide a fixing loop so that the wire does not protrude out of the drum.

The part 20a also has a thick neck 46 which is inserted correctly into the hole 47 in the circular closing surface 23 of the drum 21, which neck 46 has an inner surface of the hole 47. It has a slightly protruding edge 48 in contact with the provided steep 49. The part 20a is a projection which acts as a part to be inserted into the central through hole 51 of the part 20b with the rod 38a externally threaded out to accept the wing nut 40a. ends at (nose, 50) The component 20b also has a base 52 which acts as a contact shoulder to the neck 46 of the component 20a.

On the protruding finger 27a having a moderately reinforced thickness as part of the tooth detent 28 axially oriented with respect to the fixed center axis on the pin 29 protruding from the surface 23 of the drum 21. The lamp is dropped or suspended by a ratchet wheel 25 consisting of a circular plate having an inner crown 26 of the teeth engaged by the tooth and a hole 25a for the passage of the rod 38a in the component 20b of the central axis. Loosening of the wires 5 is controlled. When the drum rotates clockwise, that is, when the hanging wire is released, it moves between the bite position with the toothed crown 26 defined by the shoulder 31 and the release position defined by the stop pin 32. The detent 28 has an internal cavity 30 formed by an elastic rod 53 which is always in contact with the neck 46 of the central fixed shaft. As the tooth detent 28 is pivotally installed in the eccentric position with respect to the elastic rod 53 which makes contact with the neck 46, the tooth detent 28 is in the bite position and released in response to the rotation of the winding drum. Will rotate the position. When the drum rotates in the release direction, the pin 29 also rotates in the release direction. This allows the resilient rod to drive over the neck 46 in such a way that the tooth detent moves radially outward and is placed in the stand position. When the winding drum rotates in the rewinding direction, the resilient rod drives on the neck 46 in such a way that the tooth detent moves radially inward to be placed in the unlocked position. This property of the resilient rod 53 compensates for a secure contact between the rod 53 and the neck 46. In addition, the shoulder 31 has a stop cog 31a to achieve a more desirable fixation against excessive loosening for coordination with the protruding finger 27a. Thus, the bumper finger 27a of the detent 28 slips and jumps from the teeth of the crown 26 of the ratchet wheel 25 to the teeth during the ramp down, and stops at the desired height to stop one of the crowns 26. It is inserted in the tooth. When the lamp is to be sounded, manually pulling up causes the reverse rotation of the drum 21 to be disengaged in the released state, so that the projecting finger 27a is disengaged in the unwinded state. The moment the engagement finger with the first teeth of the crown 26 engages, it allows the free rewinding of the hanging wire until the lamp stops.

According to the present invention, the unwinding speed of a hanging wire is a friction system formed by friction between two metal surfaces that fasten the circular plate of the ratchet wheel 25, which is a rigid plastic material (for example polyamide), on both sides thereof. Is easily controlled.

The ratchet wheel 25 is a rectangular metal plate 55 that conforms to the shape of the bare rod 38a of the part 20b and is provided with a straight side and rounded upper and lower holes 56 to prevent any relative rotation of the elements. The metal washer 54 acts on the circular plate inner surface of the ratchet wheel and is held in place by the base portion 52 in the part 20b of the fixed center axis, while acting on the outer surface of the circular plate.

The rectangular metal plate 55 is arranged in the sheet 57 which has the same shape and is provided on the front half body 1.

At the center of the sheet 57 is a hole 58 of such a size that allows the ring of the thumb screw 40a to rotate and act directly on the square plate 55. In this way, the pressure is adjusted by adjusting the tightening position of the thumb screw 40a, and the wire on which the lamp is suspended while a frictional force is applied on the ratchet wheel 25 by the square plate 55 and the washer 54. It becomes clear that the unwinding speed of is adjusted.

Thus, all other parts of the device, except for the rectangular plate 55, the washer 54, the central fixing part 20b and the thumbscrew 40a, which form a group of mutually cooperative metal elements, are made of a suitable plastic material. You can lose.

Of course, various modifications, modifications, additions and exchanges of the elements based on the device according to the present invention may be made without departing from the spirit and scope of the present invention.

Claims (1)

A shanghai pulley for a hanging lamp having a friction system that can be adjusted to ramp down and adjustable to a desired height, comprising: an inner crown 26 provided on a ratcheted wheel 25 with teeth and a central axis; 20a, 20b and toothed detent 28 having an elastic rod 53 which is axially rotated on the drum 21 at an eccentric position with respect to the drum 21 and is always in contact with the neck 46. Such that the tooth detent 28 is engaged with the inner crown 26 in response to the rotation of the drum 21 in the unwinding direction and released from its engaged position in response to the rewinding direction of the drum 21. Shanghai Dong pulley device for the hanging lamp characterized in that.