CN106766059A - Door body driving mechanism of air conditioner and air conditioner - Google Patents

Abstract

The invention discloses a door body driving mechanism of an air conditioner and the air conditioner, wherein the door body driving mechanism of the air conditioner comprises a rack seat and a gear assembly, the rack seat is provided with an outer side for mounting a door body of the air conditioner and an inner side back to the outer side, and a rack is mounted on the inner side; the gear assembly is in meshed transmission with the rack; the gear assembly is provided with a bearing part, the rack seat is provided with an abutting part which is pressed on the bearing part, and the abutting part and the bearing part are matched along the longitudinal sliding of the rack. The technical scheme of the invention can avoid the deformation of the rack due to the bearing of the air damper, and improve the reliability of the door body driving mechanism of the air conditioner.

Description

Door body driving mechanism of air conditioner and air conditioner

technical field

The invention relates to the field of air conditioner equipment, in particular to a door body driving mechanism of the air conditioner and the air conditioner.

Background technique

The damper of the air conditioner is located at the air outlet of the air conditioner, and the damper slides relative to the position of the air outlet. When the damper is opened, the air supplied by the air conditioner passes through the air outlet smoothly; when the damper is closed, the air outlet is blocked by the wind. The door is covered to prevent external dust from entering the air conditioner through the air outlet. The damper of the air conditioner generally has the function of automatic opening and closing. The opening and closing function relies on the driving system to drive the transmission mechanism to transmit power to the damper to control the opening and closing of the damper.

The transmission mechanism of the existing air conditioner is generally composed of a gear driving the rack, and the gear applies a torque transmission to the rack after meshing with the rack. However, the rack of the door driving mechanism of the existing air conditioner is generally installed on the damper. , the self-weight of the damper makes the rack bear pressure through the meshing between the rack and the gear. When the rack is partially deformed under pressure, it is easy to cause the movement track of the damper to change. The door drive mechanism of the air conditioner Not reliable.

Contents of the invention

The main purpose of the present invention is to provide a door body driving mechanism of an air conditioner and the air conditioner, aiming at preventing the rack from deforming under the pressure of the windshield door, and improving the reliability of the door body driving mechanism of the air conditioner.

In order to achieve the above object, the door drive mechanism of the air conditioner proposed by the present invention includes a rack seat and a gear assembly, the rack seat has an outer side for installing the air conditioner door body and an inner side facing away from the outer side, The inner side is equipped with a rack; the gear assembly is engaged with the rack for transmission; the gear assembly is provided with a receiving part, and the rack seat is provided with an abutment part that is crimped on the receiving part , the abutting portion and the receiving portion are slidably fitted along the longitudinal direction of the rack.

Preferably, the gear assembly includes a gear box and a gear located therein, the gear box has a side wall plate adapted to the profile of the rack, and the receiving portion is protruded from the side wall plate toward the The L-shaped boss on one side of the rack, the notch formed between the L-shaped boss and the side wall plate faces the first sliding groove vertically above, and the abutting part is inserted into the first sliding groove. The first rib in the slot.

Preferably, the side wall plate is provided with a second chute with a notch facing vertically downward, and the rack seat is provided with a chute that is inserted into the second chute and slidably fits with the second chute. The second rib.

Preferably, there are multiple first ribs, and the multiple first ribs are arranged at intervals in the first chute, and there are multiple second ribs, and the multiple second ribs are arranged at intervals in the second chute.

Preferably, the end of the first rib that is crimped with the receiving part is arranged in an arc or circular arc shape, and the end of the second rib that is inserted into the second chute is arranged in an arc or circular arc shape .

Preferably, the side of the rack seat facing the rack is provided with a first installation hole and a positioning portion, the rack is positioned and mounted on the rack seat through the positioning portion, and the rack is positioned through the positioning portion. Screws are fixed through the first mounting holes.

Preferably, the positioning portion is a plurality of third ribs spaced up and down along the vertical direction, and the rack is clamped in the plurality of third ribs.

The present invention also proposes an air conditioner, including a guide door body, a movable door assembly and the aforementioned air conditioner door driving mechanism, an air outlet is formed on the guide door body; the movable door assembly is arranged at the air outlet One side of the air outlet is used to open or close the air outlet; the gear assembly is fixedly installed on the guide door body, and the rack seat is connected to the movable door assembly.

Preferably, the movable door assembly includes a liner and a door body, one side of the liner is fixed on the door body, and the other side of the liner is connected to the rack seat.

Preferably, the liner is hinged to the rack seat, a pressure plate is provided on the side of the liner facing the rack seat, a support plate is provided on the rack seat, and the pressure plate abuts against the rack seat. support plate.

Preferably, the support plate on the rack seat is provided with a plurality of fourth ribs, and the lower surface of the pressure plate abuts against the plurality of fourth ribs.

Preferably, the air conditioner further includes a push rod, one end of the push rod is hinged to the rack seat, and the other end of the push rod is hinged to the door assembly.

Preferably, two ends of the push rod are provided with connecting holes, the rack seat is provided with a second mounting hole, and the door assembly is provided with a third mounting hole, and one end of the push rod is connected to the The second installation hole is axially installed, the other end of the push rod is axially installed with the third installation hole through the connection hole, and the push rod is provided with an opening along the axial direction of the two connection holes.

The technical scheme of the present invention is provided with a gear assembly and a rack seat on the door body driving mechanism of the air conditioner, the gear assembly and the rack seat are meshed for transmission, and the rack seat is connected with the door body of the air conditioner to output power to the air conditioner. door body. The gear assembly is provided with a receiving part, and the rack seat is provided with an abutment part that is crimped on the receiving part, and the weight of the rack seat and the door body is supported by the receiving part to reduce the normal force of the rack, so as to reduce The amount of deformation of the rack. In addition, the receiving portion on the gear assembly and the abutting portion of the rack seat slide and fit along the longitudinal direction of the rack, so that the rack is supported when it is stationary or in the process of longitudinal sliding, so as to prevent the rack from being damaged by the pressure of the windshield. Deformation improves the reliability of the door drive mechanism.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is the structural representation of an embodiment of the door body driving mechanism of the air conditioner of the present invention;

Fig. 2 is the exploded schematic diagram of Fig. 1;

Fig. 3 is the exploded schematic diagram of an embodiment of the air conditioner of the present invention;

Fig. 4 is a schematic diagram of the internal structure of an embodiment of the air conditioner of the present invention;

Fig. 5 is an enlarged view of part A in Fig. 3;

FIG. 6 is a structural schematic diagram of the push rod in FIG. 5 .

Explanation of reference numbers:

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The invention proposes a door body driving mechanism of an air conditioner, which is mainly used to drive the opening and closing of the windshield door of the air conditioner.

Referring to Fig. 1 and Fig. 2, in one embodiment of the present invention, the door driving mechanism of the air conditioner includes a rack seat 10 and a gear assembly 20, and the rack seat 10 has an outer side and a rear facing side for installing the air conditioner door body. The inner side of the outer side is equipped with a rack 30; the gear assembly 20 is engaged with the rack 30 for transmission; the gear assembly 20 is provided with a receiving portion 212, and the rack seat 10 is provided with an abutment that is crimped on the receiving portion 212 part 11 , the abutting part 11 and the receiving part 212 are slidably fitted along the longitudinal direction of the rack 30 .

The door body drive mechanism of the air conditioner is driven through gears and racks, wherein the gear assembly 20 is used to connect with the motor of the air conditioner to provide power output. The rack 30 is arranged on the rack seat 10. The rack seat 10 has an outer side and an opposite inner side for installing the air conditioner door body. The rack 30 is installed on the inner side of the rack seat 10 for meshing transmission with the gear assembly 20. The power of the gear assembly 20 is further output to the rack 30. The meshing methods described here can be various, such as straight tooth meshing, helical tooth meshing or other meshing methods, etc. Those skilled in the art can use the present invention Embodiments and accompanying drawings to obtain corresponding technical solutions, which will not be described here one by one. The connection between the rack seat 10 and the door body drives the door body to move. It should be clarified that there may be various connection methods described here, such as: fixing the rack seat 10 on the door body, or driving the door body through hinges. The door body presses the weight on the rack 30 through the meshing of the rack seat 10 and the gear assembly 20. In order to prevent the rack 30 from being deformed by the weight of the door body, as shown in Figure 2, in this embodiment , the gear assembly 20 is provided with a receiving portion 212 , and the rack housing 10 is provided with an abutting portion 11 that is crimped on the receiving portion 212 . The receiving part 212 is used to support the weight of the rack seat 10 and the door body, and reduce the normal force of the rack 30, so as to reduce the deformation of the rack 30, thereby improving the reliability of the door body driving mechanism. The receiving part 212 can be arranged in various ways, such as a flat plate, a chute, a protrusion or other forms of supporting structures, etc. The abutting part 11 can be a part of the rack housing 10 or it can be provided on the rack housing The protrusion of 10, of course, can also be provided with a corresponding connecting piece installed on the rack housing 10 to achieve the same purpose, and those skilled in the art can implement corresponding technical means through the embodiments of the present invention and the accompanying drawings. The abutting portion 11 and the receiving portion 212 are slidably fitted along the longitudinal direction of the rack 30, the abutting portion 11 abuts on the receiving portion 212, and when the rack seat 10 moves along the longitudinal direction of the rack 30, the abutting portion 11 is driven to And move toward the longitudinal direction of the rack 30 . The abutting portion 11 slides relative to the receiving portion 212 so that the abutting portion 11 always abuts on the receiving portion 212 to prevent the rack 30 from deforming under the pressure of the windshield door and improve the reliability of the door driving mechanism.

In order to make the sliding of the abutting portion 11 on the receiving portion 212 more reliable, as shown in FIG. 1 and FIG. The gear box 21 rotates inside to prevent the movement trajectory of the gear 22 from changing due to the entry of foreign objects. The gear box 21 has a side wall plate 211 adapted to the contour of the rack 30. The adaptation referred to here means that the shape of the side wall plate 211 does not interfere with the shape of the rack 30 and is in close contact with each other, and the side wall plate The length of 211 is greater than or equal to the length of the rack 30 , so that the sliding of the abutting portion 11 has a sufficient stroke. The receiving portion 212 is an L-shaped boss 2121 protruding from the side of the side wall plate 211 facing the rack 30, and a first chute 213 with a notch facing vertically upward is formed between the L-shaped boss 2121 and the side wall plate 211. The abutting portion 11 is a first rib 111 inserted into the first sliding groove 213 . The first rib 111 is inserted into the first slide groove 213 to prevent the abutting portion 11 from deviating from the sliding track during sliding in the first slide groove 213 , thereby further improving the reliability of the door driving mechanism. Considering the convenience of production, the first rib 111 can be arranged in various ways, such as being set as a whole rib along the longitudinal direction of the rack housing 10, or a plurality of independent ribs, etc.; the cross-section of the first rib 111 The shape is also not specifically limited, and the first rib 111 may be in the shape of a rectangle, a trapezoid, or other irregular shapes. Through the abutment of the first rib 111 and the first chute 213, the gear box 21 supports the weight of the door body and the rack seat 10, and the meshing between the gear 22 and the rack 30 only applies the driving force to rotate the rack 30 , to prevent the rack 30 from being deformed by gravity. In order to further stabilize the door body driving mechanism of the air conditioner, as shown in FIG. The second rib 112 inserted into the second chute 214 and slidably matched with the second chute 214 is provided. The second chute 214 can be formed by a baffle plate and a side wall plate extending downwards inclined to the side wall plate 211 211 is enclosed and formed, and an L-shaped boss can be arranged to be enclosed and formed by the side wall plate 211, etc. The shape of the second slide groove 214 is not specifically limited. The second convex rib 112 is inserted into the second chute 214 and is limited by the second chute 214 , so as to prevent the rack holder 10 from rotating and shifting around its longitudinal direction during the sliding process, so as to make it deviate when sliding along the longitudinal direction. The rack housing 10 slides relative to the gear case 21 . The first chute 213 is positioned at the top end of the vertical direction of the side wall plate 211, and the second chute 214 is positioned at the bottom end of the vertical direction of the side wall plate 211, so that the two ends of the rack seat 10 will be clamped on the gear On the box 21, it is convenient and stable to install.

In order to reduce the friction of the rack seat 10 in the sliding process of the gear box 21, as shown in FIG. The grooves 213 are arranged at intervals. This arrangement is convenient to reduce the contact area between the first rib 111 and the inner wall of the first sliding groove 213, reduces sliding friction, and makes the rack housing 10 slide on the gear box 21 more smoothly. Similarly, there are multiple second ribs 112, and multiple second ribs 112 are arranged at intervals in the second chute 214. This arrangement is convenient to reduce the contact area between the second ribs 112 and the inner wall of the second chute 214 , to reduce the sliding friction, so that the rack seat 10 slides on the gear box 21 more smoothly. In order to further make the rack seat 10 slide more smoothly on the gear box 21, the end of the first rib 111 that is crimped with the receiving portion 212 is arranged in an arc or circular arc shape, compared to the arrangement of the first rib 111 in a rectangular shape. Or the surface-to-surface contact of the trapezoidal section in the first sliding groove 213, the arc-shaped or circular arc-shaped end forms a line-surface contact with the first sliding groove 213, and the line-surface contact can reduce sliding friction. One end of the second rib 112 inserted into the second chute 214 is arranged in an arc or circular arc shape. Compared with the surface-to-surface contact of the second rib 112 arranged in a rectangular or trapezoidal cross-section in the second chute 214, The arc-shaped or arc-shaped end forms a line-surface contact with the second slide groove 214 , and the line-surface contact can reduce sliding friction, thereby further making the rack housing 10 slide on the gear box 21 more smoothly.

Considering that it is convenient to install the rack 30 on the rack housing 10, as shown in FIG. The rack 30 is positioned and installed on the rack housing 10 through the positioning portion 13 , and the positioning portion 13 may be a positioning groove or a rib group, etc., so that the rack 30 is positioned and installed in the rack housing 10 . The rack 30 is fixed through the first installation hole 12 by screws, so as to limit the movement of the rack 30 in the rack seat 10 . Considering the convenience of production, the positioning part 13 is a plurality of third ribs 131 spaced up and down in the vertical direction, and the rack 30 is clamped in the plurality of third ribs 131, so that the rack 30 can be easily fixed during installation. 30 is engaged, so as to limit the movement of the rack 30 in the up and down direction of the rack seat 10 , and make the rack seat 10 provide sufficient support for the rack 30 . By providing the third rib 131 , it is convenient for the rack 30 to be pre-positioned before installation, so that the rack 30 is conveniently fixed and installed with the rack holder 10 .

The present invention also proposes an air conditioner. Referring to FIG. 3 and FIG. 4 , in the embodiment of the present invention, it includes a guide door 40 , a dodge door assembly 50 and the aforementioned door drive mechanism of the air conditioner. An air outlet 41 is formed for adjusting indoor air. The movable door assembly 50 is arranged on one side of the air outlet 41 for opening or closing the air outlet 41. When the air conditioner is started, the movable door assembly 50 can be made to open the air outlet 41 so that the conditioned air of the air conditioner is discharged through the air outlet 41. ; When the air conditioner is closed, the movable door assembly 50 can close the air outlet 41 to prevent external dust from entering the air conditioner through the air outlet 41 . The gear assembly 20 is fixedly installed on the guide door body 40 , and the rack seat 10 is connected with the movable door assembly 50 . The sliding connection between the rack seat 10 and the gear box 21 in the door drive mechanism of the air conditioner makes the movable door assembly 50 slide open and close reliably relative to the guide door body 40, so that the sliding door assembly 50 of the air conditioner in the present invention The air outlet 41 can be opened or closed more reliably.

In order to make the sliding door assembly 50 more stable during the sliding process relative to the guide door body 40, as shown in FIG. The function of the door body 52 and the connecting door body 52 . One side of the lining plate 51 is fixed on the door body 52, so that the door body 52 and the lining plate 51 are connected as a whole; Connecting and hinged, the liner 51 is connected with the rack seat 10 and the door body 52 through a fixed connection. When the rack seat 10 slides relative to the gear box 21, the door body 52 slides relative to the guide door body 40. When the liner 51 is hinged to the rack seat 10 , the door body 52 can either slide along with the rack seat 10 or rotate around the hinge point between the rack seat 10 and the liner 51 . Those skilled in the art can obtain the corresponding technical solutions through the embodiments of the present invention and the accompanying drawings, which will not be repeated here. Considering that the sliding track of the door body 52 relative to the guide door body 40 is richer, as shown in FIG. 3 and FIG. One side is provided with a pressure plate 511, and the rack seat 10 is provided with a support plate 14, and the pressure plate 511 abuts on the support plate 14, so that the weight of the lining plate 51 and the door body 52 is carried on the support plate 14 through the pressure plate 511, when the door When the body 52 rotates around the hinge point between the rack seat 10 and the lining plate 51 , the pressing plate 511 slides on the supporting plate 14 . Correspondingly, the guide door body 40 is provided with a limiting sliding groove 42 adapted to the door body 52 to limit the movement track of the door body 52 . In order to reduce friction, the support plate 14 on the rack housing 10 is provided with a plurality of fourth ribs 141, the lower surface of the pressure plate 511 abuts against several fourth ribs 141, and the pressure plate 511 presses against the fourth ribs. Sliding on the 141 reduces the contact area during sliding, thereby reducing the sliding friction and making the pressing plate 511 slide on the support plate 14 more smoothly.

In order to facilitate the rotation of the sliding door assembly 50 around the rack seat 10, as shown in Figure 3 and Figure 6, in this embodiment, the air conditioner also includes a push rod 60, one end of the push rod 60 is hinged to the rack seat 10, and the push rod The other end of 60 is hinged with sliding door assembly 50 . One end of the push rod 60 is hinged to the rack seat 10, so that the sliding door assembly 50 can rotate around the hinge point on the rack seat 10; the other end of the push rod 60 is hinged to the sliding door assembly 50, and the hinge point can be arranged on the door body 52, or on the liner 51, the installation method of the hinge point can be by setting the rotating shaft on the rack seat 10; it can also be that a mounting hole is set on the rack seat 10, and then pass through the rotating shaft The mounting holes as well as connecting holes etc. Those skilled in the art can obtain the corresponding technical solutions through the embodiments of the present invention and the accompanying drawings, which will not be repeated here. By setting the hinge point, the sliding door assembly 50 can be rotated around the hinge point, and it is convenient to install the sliding door assembly 50 on the rack seat 10 . In order to further facilitate the installation of the sliding door assembly 50, in this embodiment, two ends of the push rod 60 are provided with connection holes 61, and the rack seat 10 is provided with a second installation hole 15 (not shown in the drawings). One end of the rod 60 is axially installed through the connecting hole 61 and the second mounting hole 15 through a rotating shaft or a pin shaft; Or the pin shaft is installed axially through the connecting hole 61 and the third mounting hole 53, and the push rod 60 is respectively provided with an opening 62 along the axial direction of the two connecting holes 61, so that when the rotating shaft or the pin shaft passes through the connecting hole 61, the opening 62 The hole wall of 62 is extruded and deformed, which makes the installation more convenient.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (13)

1. the door body drive mechanism of a kind of air-conditioner, it is characterised in that including：

Tooth bar seat, the tooth bar seat tool has outside for installing air-conditioner door body and the dorsad inner side in the outside, described interior Side is provided with tooth bar；

Gear assembly, the gear assembly and the tooth bar engaged transmission；

Carrier is provided with the gear assembly, the abutting part being crimped on the carrier is provided with the tooth bar seat, The abutting part is adapted to the carrier along the longitudinal sliding motion of the tooth bar.

2. the door body drive mechanism of air-conditioner as claimed in claim 1, it is characterised in that the gear assembly includes gearcase And position gear in the inner, with the sidewall paneling being adapted to the tooth bar profile, the carrier is to be convexly equipped in the gearcase The sidewall paneling forms notch direction towards the L-shaped boss of the side of the tooth bar between the L-shaped boss and the sidewall paneling First chute above vertically, the abutting part is the first convex tendon in insertion first chute.

3. the door body drive mechanism of air-conditioner as claimed in claim 2, it is characterised in that be provided with notch on the sidewall paneling Towards the second chute of lower section vertically, be provided with the tooth bar seat insertion second chute and with second slide Second convex tendon of adaptation.

4. the door body drive mechanism of air-conditioner as claimed in claim 3, it is characterised in that first convex tendon be it is a plurality of, it is many The interval setting in first chute of first convex tendon described in bar, second convex tendon is a plurality of, and a plurality of second convex tendon exists Interval setting in second chute.

5. the door body drive mechanism of air-conditioner as claimed in claim 4, it is characterised in that first convex tendon and the undertaking Portion's crimping one end is curved or circular arc is set, second convex tendon insert second chute one end is curved or circular arc Shape is set.

6. the door body drive mechanism of the air-conditioner as described in any one of claim 1 to 5, it is characterised in that the tooth bar seat surface The first mounting hole and location division are provided with to the side of the tooth bar, the tooth bar is by the location division location and installation in the tooth On bar seat, the tooth bar is fixed by screw through first mounting hole.

7. the door body drive mechanism of air-conditioner as claimed in claim 6, it is characterised in that the location division is for vertically Upper and lower spaced a plurality of 3rd convex tendon, the tooth bar is held in a plurality of 3rd convex tendon.

8. the air-conditioner any one of a kind of air-conditioner, including guiding door body, mobile door assembly and claim 1 to 7 Door body drive mechanism, it is characterised in that be formed with air outlet in the guiding door body；The mobile door assembly is arranged on described The side of air outlet is used to open or close the air outlet；The gear assembly is fixedly installed in the guiding door body, institute Tooth bar seat is stated to be connected with the mobile door assembly.

9. air-conditioner as claimed in claim 8, it is characterised in that the mobile door assembly includes liner plate and door body, the lining The side of plate is fixed in the door body, and the opposite side of the liner plate is connected with tooth bar seat.

10. air-conditioner as claimed in claim 9, it is characterised in that the liner plate is hinged with tooth bar seat, the liner plate court Pressing plate is provided with to the side of tooth bar seat, the tooth bar seat is provided with supporting plate, and the pressing plate is connected in the supporting plate.

11. air-conditioners as claimed in claim 10, it is characterised in that the supporting plate on tooth bar seat is provided with a plurality of the Four convex tendons, the lower surface of the pressing plate is connected on some articles of the 4th convex tendons.

Air-conditioner in 12. such as claim 8 to 11 as described in any one, it is characterised in that the air-conditioner also includes push rod, One end of the push rod is hinged with tooth bar seat, and the other end of the push rod is hinged with the door body assembly.

13. air-conditioners as claimed in claim 12, it is characterised in that the two ends of the push rod are provided with connecting hole, the tooth bar Seat is provided with the second mounting hole, and the door body assembly is provided with the 3rd mounting hole, and described push rod one end is by connecting hole and described the Two mounting holes are axially mounted, and the other end of the push rod is axially mounted with the 3rd mounting hole by connecting hole, the push rod Axially each along connecting hole described in two sets an opening.