CN208851432U - A kind of dish-washing machine with permanent magnetism suction upper cover - Google Patents

Abstract

The utility model discloses a kind of dish-washing machines with permanent magnetism suction upper cover, being fixed on dish-washing machine ontology including dish-washing machine ontology, side can be rotated to be opened and closed the upper cover of dish-washing machine, upper lid is equipped with the first permanent magnet, position corresponding with the first permanent magnet is equipped with the second permanent magnet on dish-washing machine ontology, it further include the driving device for driving the second permanent magnet mobile, the driving device is located at the lower section of the second permanent magnet, it is connect by connecting column with the second permanent magnet, the connection post part is located in driving device, and driving device is drivingly connected column and moves up and down.The utility model is using magnet as locking mechanism, and structure is simple, and easy to operate, failure rate is low.

Description

A kind of dish-washing machine with permanent magnetism suction upper cover

Technical field

The utility model belongs to dish-washing machine field, specifically, being related to a kind of dish-washing machine with permanent magnetism suction upper cover.

Background technique

Currently, the door of most of undercounter dish-washing machine on the market, generally uses buckle as locking mechanism, leads at closing time It crosses buckle to be closed side door, but structure is complicated for snap device, and high failure rate, is not easy to be commonly used.

Application No. is the Chinese patents of CN201120484676.4 to disclose a kind of side door attracting device of dish washing machine, including side Door body, and the side plate connecting with side door body peripheral face, the side plate at left and right sides of side door ontology pass through door lining connection gear Water plate, the bottom of two sides water fender are equipped with the door-hinge for connecting with dish-washing machine ontology, the surface of side plate of side door body upper end Equipped with the magnet for side door ontology and dish-washing machine ontology to be attracted.But the structure is since magnet positions are fixed, so that side door Attraction is constant for being bonded between ontology and dish-washing machine ontology, and the unlatching of side door ontology is influenced if the close magnetic force in position is larger, It needs to open compared with great strength, the closing of side door ontology is influenced if magnetic force is smaller farther out if position, it has not been convenient to which user uses.

In view of this special to propose the utility model.

Utility model content

It is a kind of with permanent magnetism suction the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide The dish-washing machine of upper cover, using magnet as locking mechanism, structure is simple, easy to operate, and failure rate is low.

In order to solve the above technical problems, the basic idea of the utility model adopting the technical scheme is: a kind of inhale with permanent magnetism The dish-washing machine of formula upper cover, being fixed on dish-washing machine ontology including dish-washing machine ontology, side can be rotated to be opened and closed the upper cover of dish-washing machine, Upper lid is equipped with the first permanent magnet, and position corresponding with the first permanent magnet is equipped with the second permanent magnet on dish-washing machine ontology, further includes The driving device for driving the second permanent magnet mobile.

The driving device is located at the lower section of the second permanent magnet, is connect by connecting column with the second permanent magnet.Driving device The second permanent magnet can be driven to rise or fall by connecting column.

Preferably, the connection post part is located in driving device, and driving device is drivingly connected column and moves up and down.Driving dress It sets drive connection column to move up and down, and then moves up and down the second permanent magnet being located on connecting column.

The driving device is motor, and is equipped with command reception module.When motor receives shutdown instruction, motor is driven Second permanent magnet up moves, and the magnetic attraction between the first permanent magnet and the second permanent magnet is in close state door；Work as motor When receiving door open command, motor drives the second permanent magnet to move down, the magnetic attraction between the first permanent magnet and the second permanent magnet It disappears.

The junction of the dish-washing machine ontology and upper cover is equipped with the damping unit of control upper cover composed view.It is hindered by adjusting The gravity of Buddhist nun's device, the pulling force of damper and upper cover can keep balancing in a position between 0 ° of α ∝, upper cover with horizontal direction Angle is that the position of α is static.The first elastic construction that can flick upper cover is additionally provided on dish-washing machine ontology or upper lid.

First elastic construction is located on the lower surface of upper cover and dish-washing machine body contacts, with first on dish-washing machine ontology The corresponding position of elastic construction is equipped with deep gouge.When second permanent magnet rises, upper cover and dish-washing machine ontology closure are located on upper lid The first elastic construction be squeezed compression enter dish-washing machine ontology on deep gouge in so that nothing at upper cover and dish-washing machine ontology closure Gap；When second permanent magnet declines, compressing force suffered by the first elastic construction disappears, and the first elastic construction moment flicked, and restores Natural elongation state, upper cover are flicked.

First elastic construction is located on the upper surface that dish-washing machine ontology is contacted with upper cover, upper cover and the first elastic construction Corresponding position be equipped with deep gouge.When second permanent magnet rises, upper cover and dish-washing machine ontology closure, on dish-washing machine ontology First elastic construction, which is squeezed to compress, to be entered in the deep gouge of upper cover, so that gapless at upper cover and dish-washing machine ontology closure；Second When permanent magnet declines, compressing force suffered by the first elastic construction disappears, and the first elastic construction moment flicked, and restores nature elongate State, upper cover are flicked.

The inner cavity of the deep gouge is greater than the shape of the first elastic construction, and it is complete that the depth of deep gouge is greater than the first elastic construction Length when compression, less than the length under the first elastic construction nature elongation state.The inner cavity of deep gouge is greater than the first elasticity knot The shape of structure, so that the first elastic construction enters the compressed inner cavity into Shi Buyu deep gouge in deep gouge and generates interference；Deep gouge Depth is greater than length when the first elastic construction compresses completely, submerges deep gouge completely when allowing the first elastic construction compressed In, without generating interference with upper cover or the body ontology that washes the dishes；The depth of deep gouge is less than under the first elastic construction nature elongation state Length so that in the state of compression when the first elastic construction submerges in deep gouge, when the decline of the second permanent magnet, the first elasticity Compressing force suffered by structure disappears, and is restored by compressive state to natural elongation state, upper cover is flicked.Preferably, described first Elastic construction is spring.Spring is more common in life, and use is wide, which is reaching expected using spring Cost can be reduced in the case where purpose again.

Alternatively, the alternative of above scheme is, it is equipped in dish-washing machine and is connect with upper cover and control upper cover composed view Second elastic mechanism.By adjusting the second elastic mechanism, the gravity of elastic pulling force and upper cover can be in one between 0 ° of 90 ° of < α < A position keeps balance, and upper cover is static in α angle.

Second elastic mechanism include elastic portion, adjust elastic portion elastic force flexible adjustment portion, connection upper cover and The rotation section of the hinge arrangement of dish-washing machine ontology, the interconnecting piece of connects hinge structure and elastic portion, support interconnecting piece.

The elastic portion is the spring that drag hook is equipped with positioned at the both ends for the motor spindle that washes the dishes；The flexible adjustment portion is and elasticity The connected elastic adjusting plate at least two open-minded teeth in portion.One end drag hook of spring is connected with flexible adjustment portion, adjustable The other end drag hook of the elastic force of spring, spring is connected with interconnecting piece, and the pulling force of spring is passed to upper cover, controls upper cover Folding；Elastic portion is connected from different open-minded teeth, and the level of stretch of elastic portion is different, thus it is possible to vary the elastic force of elastic portion.

The hinge arrangement includes hinge shaft and hinge connector, and hinge shaft runs through the side wall of dish-washing machine ontology, and one End is fixedly connected with upper cover, and one end part that is connected by a hinge is connect with interconnecting piece.When interconnecting piece generates pulling force to hinge arrangement, hinge Chain shaft rotates through the part of the side wall of dish-washing machine ontology, and hinge shaft is fixed on the part on lid and upwarps, upper cover It opens.

The interconnecting piece is rope, and the rotation section is the fixed pulley for being fixed on rope corner.Fixed pulley can be not The direction for changing rope in the case where changing the drawing force of rope transmitting, guides drawing force to be transmitted to upper cover from elastic portion, controls The folding of upper cover.

After adopting the above technical scheme, the utility model has the advantages that compared with prior art.

1, driving device can drive the second permanent magnet to rise or fall by connecting column；

2, the driving device is motor, and is equipped with command reception module, when motor receives shutdown instruction, motor band Dynamic second permanent magnet up moves, and the magnetic attraction between the first permanent magnet and the second permanent magnet is in close state door；Work as electricity When machine receives door open command, motor drives the second permanent magnet to move down, the magnetic between the first permanent magnet and the second permanent magnet Power disappears；

3, the junction of the dish-washing machine ontology and upper cover is equipped with the damping unit of control upper cover composed view.Pass through adjusting The gravity of damper, the pulling force of damper and upper cover can keep balancing in a position between 0 ° of α ∝, upper cover with level side It is static to the position that angle is α；

4, the second elastic mechanism that upper cover composed view is connect and controlled with upper cover is equipped in dish-washing machine, by adjusting second The gravity of elastic mechanism, elastic pulling force and upper cover can keep balancing in a position between 0 ° of 90 ° of < α <, and upper cover is in α angle It is static；

5, the elastic portion is the spring that drag hook is equipped with positioned at the both ends for the motor spindle that washes the dishes, one end drag hook and elasticity of spring Adjustment portion is connected, and the other end drag hook of the elastic force of adjustable spring, spring is connected with interconnecting piece, and the pulling force of spring is passed Upper cover is passed, the folding of upper cover is controlled；

6, the flexible adjustment portion is the elastic adjusting plate at least two open-minded teeth being connected with elastic portion, elastic portion with Different open-minded tooth connections, the level of stretch of elastic portion are different, thus it is possible to vary the elastic force of elastic portion；

7, fixed pulley can change the direction of rope in the case where not changing the drawing force of rope transmitting, guide drawing force It is transmitted to upper cover from elastic portion, controls the folding of upper cover.

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.

Detailed description of the invention

The a part of attached drawing as the utility model, is further understood from the utility model for providing, this is practical Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model. Obviously, the accompanying drawings in the following description is only some embodiments, to those skilled in the art, is not paying creation Property labour under the premise of, can also be obtained according to these attached drawings other accompanying drawings.In the accompanying drawings:

Fig. 1 is the dish-washing machine schematic diagram that the utility model has permanent magnetism suction upper cover；

Fig. 2 is another embodiment schematic diagram of dish-washing machine that the utility model has permanent magnetism suction upper cover；

Fig. 3 is the utility model the second elastic mechanism schematic diagram.

In figure: 1, dish-washing machine ontology；2, upper cover；3, the first permanent magnet；4, the second permanent magnet；5, driving device；6, second Elastic mechanism；7, connecting column；8, elastic portion；9, flexible adjustment portion；10, interconnecting piece；11, rotation section；12, hinge arrangement；13, it cuts with scissors Chain shaft；14, hinge connector；15, damping unit；16, the first elastic construction.

It should be noted that these attached drawings and verbal description are not intended to limit the design of the utility model in any way Range, but illustrate the concept of the utility model for those skilled in the art by referring to specific embodiments.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer The technical solution in embodiment is clearly and completely described in attached drawing in type embodiment, and following embodiment is for illustrating this Utility model, but be not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that term " on ", "lower", "front", "rear", "left", "right", The orientation or positional relationship of the instructions such as "vertical", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for describing the utility model and simplifying description, rather than the device or element of indication or suggestion meaning must have specific side Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary. For the ordinary skill in the art, can be understood with concrete condition above-mentioned term in the present invention specifically contain Justice.

As shown in Figure 1 to Figure 3, a kind of dish-washing machine with permanent magnetism suction upper cover of the utility model, including dish-washing machine ontology 1, side, which is fixed on dish-washing machine ontology 1, can be rotated to be opened and closed the upper cover 2 of dish-washing machine, and upper cover 2 is equipped with the first permanent magnet 3, washes Position corresponding with the first permanent magnet 3 is equipped with the second permanent magnet 4 on bowl machine ontology 1, further includes driving the second permanent magnet 4 mobile Driving device 5.

The driving device 5 is located at the lower section of the second permanent magnet 4, is connect by connecting column 7 with the second permanent magnet 4.Driving Device 5 can drive the second permanent magnet 4 to rise or fall by connecting column 7.

The driving device 5 is motor, and is equipped with command reception module.When motor receives shutdown instruction, motor band Dynamic second permanent magnet 4 up moves, and the magnetic attraction between the first permanent magnet 3 and the second permanent magnet 4 is in close state door；When When motor receives door open command, motor drives the second permanent magnet 4 to move down, between the first permanent magnet 3 and the second permanent magnet 4 Magnetic attraction disappears.

A kind of upper cover folding control method of the dish-washing machine with permanent magnetism suction upper cover, dish-washing machine send opening signal to drive Dynamic device 5；Driving device 5 receives opening signal, and the second permanent magnet 4 of control is mobile to the direction far from the first permanent magnet 3；It washes the dishes Machine sends door signal to driving device 5；Driving device 5 receives door signal, and the second permanent magnet 4 of control is to close to the first permanent magnetism The direction of iron 3 is mobile.

Embodiment one

7 part of connecting column described in the present embodiment is located in driving device 5, and driving device 5 is drivingly connected on column 7 and moves down Dynamic, driving device 5 is drivingly connected column 7 and moves up, and the second permanent magnet 4 on connecting column 7 moves up, the first permanent magnet 3 and the second magnetic attraction between permanent magnet 4 upper cover 2 is in close state；Driving device 5 is drivingly connected column 7 and moves down, position It is moved down in the second permanent magnet 4 on connecting column 7, the magnetic attraction between the first permanent magnet 3 and the second permanent magnet 4 disappears.

Embodiment two

As shown in Fig. 2, the junction of dish-washing machine ontology 1 and upper cover 2 described in the present embodiment is equipped with control 2 composed view of upper cover Damping unit 15.The angle of upper cover 2 and horizontal direction is set as α, by adjusting damping unit 15, the active force of damping unit 15 It can keep balancing in a position between 0 ° of α ∝ with the gravity of upper cover 2, upper cover 2 is static here.

It is corresponding, the first elastic construction 16 that can flick upper cover 2 is additionally provided on dish-washing machine ontology 1 or upper cover 2.

First elastic construction 16 is located on the lower surface that upper cover 2 is contacted with dish-washing machine ontology 1, on dish-washing machine ontology 1 Deep gouge is equipped with the corresponding position of the first elastic construction 16.When second permanent magnet 4 rises, upper cover 2 and dish-washing machine ontology 1 are closed It closes, the first elastic construction 16 in upper cover 2, which is squeezed to compress, to be entered in the deep gouge on dish-washing machine ontology 1, so that 2 He of upper cover Gapless at 1 closure of dish-washing machine ontology；When second permanent magnet 4 declines, compressing force suffered by the first elastic construction 16 disappears, and first 16 moment of elastic construction flicks, and restores nature elongation state, and upper cover 2 is flicked.

First elastic construction 16 is located on the upper surface that dish-washing machine ontology 1 is contacted with upper cover 2, upper cover 2 and the first bullet Property structure 16 corresponding position be equipped with deep gouge.When second permanent magnet 4 rises, upper cover 2 and dish-washing machine ontology 1 are closed, positioned at washing The first elastic construction 16 on bowl machine ontology 1, which is squeezed to compress, to be entered in the deep gouge of upper cover 2, so that upper cover 2 and dish-washing machine ontology 1 Gapless at closure；When second permanent magnet 4 declines, compressing force suffered by the first elastic construction 16 disappears, the first elastic construction 16 Moment flicks, and restores nature elongation state, and upper cover 2 is flicked.

The inner cavity of the deep gouge is greater than the shape of the first elastic construction 16, and the depth of deep gouge is greater than the first elastic construction 16 Completely compression when length, less than the length under the natural elongation state of the first elastic construction 16.The inner cavity of deep gouge is greater than first The shape of elastic construction 16, so that the first elastic construction 16 enters the compressed inner cavity generation into Shi Buyu deep gouge in deep gouge and does It relates to；The depth of deep gouge be greater than the first elastic construction 16 completely compression when length so that the first elastic construction 16 can when compressed To submerge in deep gouge completely, without generating interference with upper cover 2 or the body ontology 1 that washes the dishes；The depth of deep gouge is less than the first elasticity knot Length under the natural elongation state of structure 16, so that the state in compression when the first elastic construction 16 submerges in deep gouge, when second When permanent magnet 4 declines, compressing force suffered by the first elastic construction 16 disappears, and is restored by compressive state to natural elongation state, on Lid 2 is flicked.Preferably, first elastic construction 16 is spring.Spring is more common in life, and use is wide, this One elastic construction can reduce cost in the case where achieving the desired purpose using spring again.

Embodiment three

As shown in figures 1 and 3, it is equipped in the present embodiment dish-washing machine and the of 2 composed view of upper cover is connect and controlled with upper cover 2 Two elastic mechanisms 6.By the second elastic mechanism 6 of adjusting, the gravity of elastic pulling force and upper cover 2 can be in one between 0 ° of 90 ° of < α < A position keeps balance, and upper cover 2 is static in α angle.

Second elastic mechanism 6 is including in elastic portion 8, the flexible adjustment portion 9 for adjusting 8 elastic force of elastic portion, connection The hinge arrangement 12 of lid 2 and dish-washing machine ontology 1, the interconnecting piece 10 of connects hinge structure 12 and elastic portion 8, support interconnecting piece 10 Rotation section 11.

Example IV

As shown in figure 3, elastic portion 8 described in the present embodiment is the spring for being equipped with drag hook positioned at the both ends for the motor spindle that washes the dishes. One end drag hook of spring is connected with flexible adjustment portion 9, the elastic force of adjustable spring, the other end drag hook of spring with connect Portion 10 is connected, and the pulling force of spring is passed to upper cover 2, controls the folding of upper cover 2.

Embodiment five

As shown in figure 3, flexible adjustment portion 9 described in the present embodiment is to be connected with elastic portion 8 at least two open-minded teeth Elastic adjusting plate.Elastic portion 8 is connected from different open-minded teeth, and the level of stretch of elastic portion 8 is different, thus it is possible to vary elastic portion 8 Elastic force, and then adjust upper cover 2 it is static when angle [alpha] size.

Embodiment six

As shown in figure 3, hinge arrangement 12 described in the present embodiment includes hinge shaft 13 and hinge connector 14, hinge turns Axis 13 be three folded structures, the part of the first folding be connected by a hinge part 14 connection connect with interconnecting piece 10, the part of the second folding is Side wall that is horizontal positioned and running through dish-washing machine ontology 1, the part of third folding are fixedly connected with upper cover 2, the side in direction and upper cover 2 In parallel.When interconnecting piece 10 generates pulling force to hinge arrangement 12, hinge shaft 13 occurs through the part of the side wall of dish-washing machine ontology 1 Rotation, the part that hinge shaft 13 is fixed in upper cover 2 upwarp, and upper cover 2 is opened.

Embodiment seven

As shown in figure 3, interconnecting piece 10 described in the present embodiment is rope, the rotation section 11 is to be fixed on rope corner Fixed pulley.Fixed pulley can change the direction of rope in the case where not changing the drawing force of rope transmitting, guide drawing force It is transmitted to upper cover 2 from elastic portion 8, controls the folding of upper cover 2.

Embodiment eight

Groove body is equipped in the upper and lower panel of upper cover 2 described in the present embodiment, the first permanent magnet 3 is fixed in the groove body, slot Body size and the shape of the first permanent magnet 3 are agreed with；The upper end of connecting column 7 is equipped with trench structure, and the second permanent magnet 4 is fixed on this In trench structure, groove body size and the shape of the second permanent magnet 4 are agreed with.First permanent magnet 3 and the second permanent magnet 4 are equal in slot bottom Can not move, avoid upper cover 2 folding and connecting column 7 move up and down during magnet and groove body generate collide with, extension first The service life of permanent magnet 3 and the second permanent magnet 4.

Embodiment nine

It is equipped with command reception module in driving device 5 described in the present embodiment, the to be connected with upper cover 2 is equipped in dish-washing machine Two elastic mechanisms 6, adjust the second elastic mechanism 6, the gravity of the pulling force of the second elastic mechanism 6 and upper cover 20 ° of 90 ° of < α < it Between a position keep balance, when driving device 5 receive shutdown instruction when, driving device 5 drive the second permanent magnet 4 up Mobile, the magnetic attraction between the first permanent magnet 3 and the second permanent magnet 4 is in close state upper cover 2；When driving device 5 receives When to door open command, driving device 5 drives the second permanent magnet 4 to move down, the magnetic between the first permanent magnet 3 and the second permanent magnet 4 Suction disappears, and the drawing force of the second elastic mechanism 6 makes upper cover 2 return to the position that angle is α, and door is opened.

The above is only the preferred embodiment of the utility model, not makees in any form to the utility model Limitation, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with The technical staff of this patent is not departing within the scope of technical solutions of the utility model, when the technology contents work using above-mentioned prompt A little equivalent embodiment changed or be modified to equivalent variations out, but all contents without departing from technical solutions of the utility model, Any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still belong to In the range of the utility model.

Claims (10)

1. a kind of dish-washing machine with permanent magnetism suction upper cover, including dish-washing machine ontology (1), side are fixed on dish-washing machine ontology (1) It is upper to can be rotated to be opened and closed the upper cover (2) of dish-washing machine, it is characterised in that: upper cover (2) is equipped with the first permanent magnet (3), dish-washing machine sheet Position corresponding with the first permanent magnet (3) is equipped with the second permanent magnet (4) on body (1), further includes driving the second permanent magnet (4) mobile Driving device (5).

2. a kind of dish-washing machine with permanent magnetism suction upper cover as described in claim 1, it is characterised in that: the driving device (5) it is located at the lower section of the second permanent magnet (4), is connect by connecting column (7) with the second permanent magnet (4).

3. a kind of dish-washing machine with permanent magnetism suction upper cover as claimed in claim 2, it is characterised in that: the connecting column (7) Part is located in driving device (5), and driving device (5) is drivingly connected column (7) and moves up and down.

4. a kind of dish-washing machine with permanent magnetism suction upper cover as described in claim 1, it is characterised in that: the driving device (5) it is motor, and is equipped with command reception module.

5. a kind of dish-washing machine with permanent magnetism suction upper cover as described in claim 1, it is characterised in that: the dish-washing machine ontology (1) and the junction of upper cover (2) is equipped with the damping unit (15) for controlling upper cover (2) composed view, dish-washing machine ontology (1) or upper cover (2) the first elastic construction (16) that can flick upper cover (2) is additionally provided on.

6. a kind of dish-washing machine with permanent magnetism suction upper cover as described in claim 1, it is characterised in that: be equipped in dish-washing machine with Upper cover (2) connection and the second elastic mechanism (6) for controlling upper cover (2) composed view.

7. a kind of dish-washing machine with permanent magnetism suction upper cover as claimed in claim 6, it is characterised in that: the described second elastic machine Structure (6) includes elastic portion (8), the flexible adjustment portion (9) for adjusting elastic portion (8) elastic force, connection upper cover (2) and dish-washing machine sheet The hinge arrangement (12) of body (1), the interconnecting piece (10) of connects hinge structure (12) and elastic portion (8), support interconnecting piece (10) Rotation section (11).

8. a kind of dish-washing machine with permanent magnetism suction upper cover as claimed in claim 7, it is characterised in that: the elastic portion (8) For the spring for being equipped with drag hook positioned at the both ends for the motor spindle that washes the dishes；The flexible adjustment portion (9) is to have with what elastic portion (8) was connected The elastic adjusting plate of at least two open-minded teeth.

9. a kind of dish-washing machine with permanent magnetism suction upper cover as claimed in claim 7, it is characterised in that: the hinge arrangement It (12) include hinge shaft (13) and hinge connector (14), hinge shaft (13) runs through the side wall of dish-washing machine ontology (1), one end It is fixedly connected with upper cover (2), one end part (14) that is connected by a hinge is connect with interconnecting piece (10).

10. a kind of dish-washing machine with permanent magnetism suction upper cover as claimed in claim 7, it is characterised in that: the interconnecting piece It (10) is rope, the rotation section (11) is the fixed pulley for being fixed on rope corner.