CN221356300U - Folding chair frame - Google Patents

Abstract

A folding chair frame is provided with two rear supporting rods positioned at the rear, the lower sections of the rear supporting rods form supporting sections, the upper sections of the rear supporting rods form backrest sections, the upper ends of the backrest sections are connected with lower connecting pieces, an upper connecting piece is rotatably pivoted on the lower connecting pieces, an extension rod is connected to the upper connecting pieces, the upper connecting pieces rotate towards the upper end direction of the backrest sections relative to the lower connecting pieces and form propping limit after reaching the limit, the extension rod is supported above the backrest sections and is positioned on the same horizontal line with the backrest sections, and the extension rod is driven to be folded downwards to lean against the side face of the backrest sections after the upper connecting pieces reversely rotate relative to the lower connecting pieces. The backrest part of the utility model can be rotated and folded or stretched according to the use requirement, and the folding length of the chair frame can be shortened.

Description

Folding chair frame

Technical Field

The present utility model relates to chairs, and more particularly to a folding chair frame.

Background

The folding chair has the characteristics of portability and foldability, is convenient to carry and saves space, and is widely applied to various public places or is convenient to carry as an outdoor chair. The common folding chairs comprise a chair frame and chair cloth connected with the chair frame, the chair frame can be folded integrally, a backrest is also arranged in a plurality of folding chairs, and a backrest rod and backrest cloth which can be unfolded and folded simultaneously are added in the chair frame.

For the folding chairs with backrest rods, most of the backrest is in a fixed form, and the backrest rods are matched with the chair frame to be unfolded and folded integrally. In some common folding chairs with backrests, the chair frame comprises two backrest rods positioned at the rear side, the backrest rods are generally upright rod bodies, the height of the rod bodies is higher than that of a sitting rod or an armrest of the chair frame, the lower sections of the backrest rods form rear supports of the chair frame, and the upper sections of the backrest rods form backrests. In such a chair frame, since the backrest rod is of a fixed length, if a user only needs to lean against the back portion, he does not need to lean against the neck or head, or needs to raise a certain leaning height, the fixed backrest height cannot meet different use requirements. In addition, the backrest rod is generally the longest rod in the chair frame, so that the folding volume of the chair frame can be increased when the folding chair is folded, and the packaging and transportation cost is increased. The present case results therefrom.

Disclosure of utility model

The utility model aims to provide a folding chair, the backrest part of which can be rotated and folded or stretched according to the use requirement, and the folding length of the chair frame can be shortened.

In order to achieve the above object, the solution of the present utility model is:

A folding chair frame is provided with two rear supporting rods positioned at the rear, the lower sections of the rear supporting rods form supporting sections, the upper sections of the rear supporting rods form backrest sections, the upper ends of the backrest sections are connected with lower connecting pieces, an upper connecting piece is rotatably pivoted on the lower connecting pieces, an extension rod is connected to the upper connecting pieces, the upper connecting pieces rotate towards the upper end direction of the backrest sections relative to the lower connecting pieces and form propping limit after reaching the limit, the extension rod is supported above the backrest sections and is positioned on the same horizontal line with the backrest sections, and the extension rod is driven to be folded downwards to lean against the side face of the backrest sections after the upper connecting pieces reversely rotate relative to the lower connecting pieces.

Further, the upper connecting piece and the lower connecting piece respectively comprise a circular joint formed at one end of a connecting pipe sleeve, the connecting pipe sleeve is connected at the upper end of the backrest section or the lower end of the extension rod, the circular joint of the upper connecting piece and the circular joint of the lower connecting piece are pivoted at the circle center, a baffle table is arranged at the end part of the connecting pipe sleeve, a slide way with a quarter of circumference is formed in the baffle table, the circular joint is positioned at one side of the slide way, and the circular joint of the upper connecting piece rotates in the slide way of the lower connecting piece in a homeotropic manner.

Further, the connecting pipe sleeve is inserted in the upper end of the backrest section or the lower end of the extension rod is fixed in the lower end of the extension rod, a resisting plane is arranged in one end, far away from the sleeve, of the resisting table and is positioned at one end of the slideway, and the resisting plane in the upper connecting piece is abutted against the resisting plane of the lower connecting piece to form limit when the upper connecting piece rotates to the upper side of the lower connecting piece.

Further, in the circular joint of the upper connecting piece or the lower connecting piece, one side which forms close rotation with the other circular joint is defined as an inner side surface, wherein an arc-shaped positioning convex particle is outwards convexly arranged in the circumference of the inner side surface of one circular joint, a positioning notch is correspondingly concavely arranged in the circumference of the inner side surface of the other circular joint, and the positioning convex particle is positioned in the positioning notch when the upper connecting piece and the lower connecting piece form close limiting.

Further, the inner side surface circumference of one circular connector is convexly formed into an annular convex edge, the inner side surface circumference of the other circular connector is concavely provided with a circumferential step part for inserting the annular convex edge, and the annular convex edge is limited in the circumferential step part to rotate.

Further, the folding chair frame comprises left and right symmetrical supporting frames, crossed supporting rod groups are rotatably pivoted between the front parts and the rear parts of the two supporting frames respectively, each supporting frame comprises a rear supporting rod, an inclined supporting rod, a sitting rod, a handrail supporting rod and a handrail supporting rod, the upper ends of the inclined supporting rods are rotatably pivoted on a rear connecting piece, the lower ends of the handrail supporting rods are slidably connected to the rear supporting rods, the rear ends of the sitting rods are pivoted on the rear connecting piece, the front ends of the sitting rods are pivoted and supported on a front connecting seat fixed on the handrail supporting rods, the handrail supporting rods are movably connected between the rear supporting rods and the handrail supporting rods positioned in front of the rear supporting rods, and the upper sections of the rear supporting rods, which are positioned above the sitting rods, form backrest sections.

Further, a group of rear cross supporting rod groups are pivoted between the rear parts of the two rear supporting rods, the upper ends of the two supporting rods in the rear cross supporting rod groups are respectively pivoted to the backrest section, and the upper connecting piece is connected above the pivoting part of the upper ends of the supporting rods in the rear cross supporting rod groups.

Further, a group of front cross supporting rod groups are pivoted between the front parts of the two rear supporting rods, the upper ends of the two supporting rods in the front cross supporting rod groups are respectively pivoted on a front connecting seat, the front connecting seat is connected to the armrest supporting rods, and the front ends of the sitting rods are arranged on the front connecting seats.

Further, the front end of the handrail rod is provided with a joint, an inserting cavity is arranged below the joint, a socket is further formed in the side wall of the inserting cavity, a clamping plate capable of being pulled is arranged in the socket, the clamping plate is provided with a clamping hole, the top of the handrail supporting rod is provided with a ball head, a clamping groove is formed below the ball head, and the clamping hole is clamped in the clamping groove after the ball head penetrates through the clamping hole.

Further, the clamping plate is provided with a vertical plate and a horizontal plate, the vertical plate is vertically arranged at the end part of the horizontal plate, the horizontal plate is provided with a clamping hole, the horizontal plate is provided with a second kidney-shaped hole, a locking piece is fixedly penetrated below the joint, and the locking piece is penetrated in the second kidney-shaped hole; the outer side wall of the insertion cavity is concavely provided with a plate groove above the insertion opening, the plate groove is provided with a positioning column on the surface of the vertical plate, the positioning column is sleeved with a spring, the vertical plate is embedded in the plate groove, and the vertical plate compresses the spring when being pressed.

After the structure is adopted, the extension rod which can be flexibly adjusted is additionally arranged on the rod piece of the backrest part of the folding chair, and the extension rod can be turned up or folded down under the driving action of the upper connecting piece, so that the extension rod can be adjusted according to different use requirements, and different use requirements are met. When the chair frame is folded, the extension rod can be folded to reduce the whole length of the backrest rod piece, thereby being more convenient for packaging and transportation.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model (showing the back);

FIGS. 3 and 4 are schematic structural views of the upper and lower connectors of the present utility model;

FIG. 5 is a side view of the upper and lower connectors of the present utility model;

fig. 6 and 7 are exploded views of the handrail connecting member of the front end of the handrail lever according to the present utility model.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

As shown in fig. 1, the utility model discloses a folding chair frame, a piece of chair cloth (not shown in the figure) is arranged on the folding chair frame, the chair cloth can be synchronously unfolded and folded when the chair frame is unfolded, the unfolded folding chair frame comprises a sitting portion and a backrest portion, and the integrally unfolded backrest portion can enable the chair frame to be more comfortable to sit on. By arranging two rear support rods 1 positioned at the rear in the folding chair frame, the lower sections of the rear support rods 1 can form a support section to support the seat part of the chair frame, and the upper sections of the rear support rods 1 can form a backrest section to form a backrest support.

Referring to fig. 1 and 2, in this embodiment, the folding chair frame includes a left-right symmetrical supporting frame, a cross supporting rod set is rotatably pivoted between the front portion and the rear portion of the two supporting frames, each supporting frame includes a rear supporting rod 1, an inclined supporting rod 2, a sitting rod 3, a grab handle 4 and a handrail supporting rod 5, the rear supporting rod 1 in this embodiment forms a supporting upright rod inclined backward, the upper end of the inclined supporting rod 2 is rotatably pivoted on a rear connecting piece 21, the lower end of the handrail supporting rod 5 is slidably connected on the rear supporting rod 1, the lower end of the handrail supporting rod 5 is connected on a sliding block 51, and the sliding block 51 is sleeved on the lower section of the rear supporting rod 1 and is located above the lower pivot point in the cross supporting rod set. The rear end of the sitting rod 3 is pivoted to the rear connecting piece 21, the front end of the rear connecting piece 21 is connected with the sitting rod 3, the rear end is connected with the inclined stay rod 2, and a penetrating opening through which the rear support rod 1 can penetrate is formed in the middle. The front end of the sitting bar 3 is pivotally connected and supported on a front connecting seat 51 fixed to the armrest support bar 5. The grab rail 4 is movably connected between the rear support rod 1 and the grab rail 5 in front of the rear support rod, so that the front end of the grab rail 4 can be released from positioning when the chair frame is folded, thereby facilitating the integral folding of the chair frame.

The lower section of the rear supporting rod 1, which is positioned below the sitting rod 3, forms a supporting section 11, the upper section of the rear supporting rod 1, which is positioned above the sitting rod 3, forms a backrest section 12, and a backrest part for the back of a user to rest on is formed between the two backrest sections 12. A group of rear cross strut groups are pivoted between the rear parts of the two rear support rods 1, the upper ends of the two struts 61 in the rear cross strut groups are respectively pivoted to the backrest section 12, a group of front cross strut groups are pivoted between the front parts of the two rear support rods 1, the upper ends of the two struts 62 in the front cross strut groups are respectively pivoted on a front connecting seat 31, the front connecting seat 31 is connected to the armrest support rods 5, and the front ends of the sitting bars 3 are arranged on the front connecting seats 3.

In this embodiment, the armrest 4 can be released to facilitate the folding of the chair frame, as shown in fig. 1, 6 and 7, the front end of the armrest 4 has a connector 41, an insertion cavity 411 is provided below the connector 41, at least one insertion opening 411 is further provided on the side wall of the insertion cavity 411, a pullable clamping plate 42 is installed in the insertion opening 411, the clamping plate 42 has a clamping hole 4211, a ball head 52 is provided on the top of the armrest supporting rod 5, a clamping groove 53 is provided below the ball head 52, and the clamping hole 4211 is clamped in the clamping groove 53 after the ball head 52 passes through the clamping hole 4211, thereby fixing the connector 41 at the upper end of the armrest supporting rod 5 to fix the armrest 4. In order to facilitate pushing or pulling the clamping plate 42, the clamping plate 42 has a vertical plate 422 and a horizontal plate 421, the vertical plate 422 is vertically disposed at the end of the horizontal plate 421, the horizontal plate 421 is provided with a fastening hole 4211, the horizontal plate 4211 is provided with a second kidney-shaped hole 4212, a locking member is disposed below the connector 41 in a penetrating manner, and the locking member is disposed in the second kidney-shaped hole 4212 in a penetrating manner to limit the clamping plate 42. Further, in order to improve the convenience and flexibility of using the clamping plate 42, a plate slot 4112 is concavely formed in the outer side wall of the insertion cavity 411 above the insertion opening, a positioning column 4113 is formed on the surface of the plate slot 4112 opposite to the surface of the vertical plate 422, a spring (not shown) is sleeved on the positioning column 4113, the vertical plate 422 is embedded in the plate slot 4112, and the vertical plate 422 compresses the spring when being pressed. Further, a retractable cup holder 43 may be further disposed in the connector for being pulled out for use when needed, an insertion opening 412 is concavely disposed on the side wall of the connector 41, a cavity is formed in the connector 41 and located inside the insertion opening, a cup clamping portion 431 is formed at the front end of the cup holder 43, a first kidney-shaped hole 432 is formed at the rear end of the cup holder, a limiting member (not shown) is disposed on the handle rod in a penetrating manner, the limiting member is disposed in the first kidney-shaped hole 4321, the cup holder 43 is inserted into the cavity through the insertion opening 412, and the limiting member moves forward or backward along the length direction of the first kidney-shaped hole along with the extension or retraction of the cup clamping portion 431, so that the cup holder can be taken out according to the use requirement and pushed back when not in use.

In the utility model, in order to make the backrest part of the folding chair more flexible to use, a lower connecting piece 7 is connected to the upper end of the backrest section 12 of the rear supporting rod 1, an upper connecting piece 8 is rotatably pivoted on the lower connecting piece 7, an extension rod 9 is connected to the upper connecting piece 8, and after the upper connecting piece 8 rotates to the upper end direction of the backrest section 12 (anticlockwise in the embodiment) relative to the lower connecting piece 7 to the limit, the upper connecting piece 8 can form a supporting limit (no longer rotate), so that the extension rod 9 is supported above the backrest section 12 and is positioned on the same horizontal line with the backrest section, and the whole use length of the backrest section 12 is increased. Conversely, when the upper connecting piece 8 rotates reversely (downwards) relative to the lower connecting piece 7, the extension rod 9 can be driven to be folded downwards to lean against the side surface of the backrest section 12, and the extension rod 9 is folded downwards, so that the extension effect of the extension rod 9 is avoided. Wherein, the upper connecting piece 8 is connected above the upper end pivot joint of the support rod 61 in the rear cross support rod group, so as to avoid interference.

Specifically, as shown in fig. 3 and 4, the upper connector 8 may include a circular connector 82 formed at one end of a connecting tube sleeve 81, and the lower connector 7 may include a circular connector 72 formed at one end of a connecting tube sleeve 71, respectively. The connecting pipe sleeve 81 of the upper connecting piece 8 is connected to the lower end of the extension rod 9, the connecting pipe sleeve 71 of the lower connecting piece 7 is connected to the upper end of the backrest section 12, and the circular joint 82 of the upper connecting piece 8 is pivoted with the circular joint 72 of the lower connecting piece 7 at the center of a circle. The connecting tube sleeves 81 in the upper connecting piece 8 can be inserted into the lower end of the extension rod and then fixed, and the connecting tube sleeves 71 in the lower connecting piece 7 can be inserted into the upper end of the backrest section 12 and then fixed.

As shown in fig. 3 and 4, the end of each connecting sleeve is provided with a baffle, a quarter-circumference slide way 812 is formed in the baffle 811 in the connecting sleeve 81 of the upper connecting member 8, and the circular joint 82 is located at one side of the slide way 812. In the connecting sleeve 71 of the lower connecting piece 7, a quarter-circumferential slide 712 is formed in the abutment 711, and the circular joint 72 is located on one side of the slide 712. After the circular connector 72 is connected with the circular connector 82, the circular connector 82 of the upper connector 8 rotates in the slide way 712 of the lower connector 7, and the circular connector 72 of the lower connector 7 rotates in the slide way 812 of the upper connector 8. In each abutment, an abutment plane is provided at an end of the abutment remote from the socket sleeve at an end of the slide, as shown in the figure, and in the upper connecting member 8, an abutment plane 813 is provided at an end of the abutment 811 remote from the socket sleeve 81 at an end of the slide 812. In the lower connecting piece 7, a retaining plane 713 is provided in the end of the retaining table 711 remote from the socket sleeve 71 at the end of the slideway 712. Abutment plane 813 in upper link 8 may form a stop against abutment plane 713 of lower link 7 when upper link 7 is rotated over lower link 8, thereby allowing extension bar 9 to be positioned supportingly over back segment 12.

As shown in fig. 3 to 5, in the circular joint of the upper connecting piece 8 or the lower connecting piece 7, one side which forms a close rotation with the other circular joint is defined as an inner side surface, so that the circumference of the inner side surface of one circular joint is convexly formed into an annular convex edge, the circumference of the inner side surface of the other circular joint is concavely provided with a circumferential step part for inserting the annular convex edge, and the annular convex edge can be limited in the circumferential step part to rotate. In this embodiment, an annular protruding edge 721 is formed by protruding the inner side surface circumference of the circular connector 72 of the lower connector 7, a circumferential step portion 821 into which the annular protruding edge 721 is inserted is concavely provided in the inner side surface circumference of the circular connector 82 of the upper connector 8, and the annular protruding edge 721 can be limited in the circumferential step portion 821 to rotate, so that smooth rotation is ensured. Further, an arc-shaped positioning protrusion is protruding outwards from the inner side surface of one of the circular connectors, in this embodiment, an arc-shaped positioning protrusion 722 is protruding inwards from the inner side surface of the circular connector 72 of the lower connector 7, a positioning notch 822 is correspondingly recessed in the inner side surface of the circular connector 82 of the upper connector 8, and the positioning protrusion 722 can be positioned into the positioning notch 822 when the upper connector 8 and the lower connector 7 rotate to form an abutting limit, so that the upper connector 7 can be limited to abut against the upper side of the lower connector 8, and the extension rod 9 is supported more stably.

When the folding chair frame is used, the clamping plate 42 can be pressed firstly when the folding chair frame is folded, and after the clamping plate moves inwards, the ball 52 at the upper end of the handrail support rod 5 can be separated from the clamping hole 4211, so that the joint 41 is released from the upper end of the handrail support rod 5; after the positioning action of the armrest rod 4 is released, the front and rear two groups of crossed supporting rod groups are collected and leaned, when the upper ends of the two supporting rods 62 in the front crossed supporting rod group move upwards, the sliding blocks 51 at the bottom ends of the armrest supporting rods 5 are driven to slide upwards on the rear supporting rods 1, the upward movement of the armrest supporting rods 4 drives the front connecting seat 31 to lift, the sitting rod 3 is collected and leaned downwards, and the two rear supporting rods 1 are collected and leaned until the whole chair frame is collected and leaned together. For the backrest part in the chair frame, the extension rod 9 can be folded under the driving action of the upper connecting piece 8 in the upper section of the rear supporting rod 1, so that the length of the rear supporting rod 1 is shortened, the whole folding length of the folding chair frame is shortened, the length is shortened, and the folding chair frame is more convenient to package and transport. Otherwise, after the folding chair frame is unfolded, the front end connector of the handrail rod 4 is clamped above the handrail supporting rod for positioning. For the backrest part in the chair frame, when the backrest rod needs to be prolonged, the extension rod 9 can be turned over under the driving action of the upper connecting piece 8, so that the height of the backrest section is increased, and conversely, the backrest section can be folded down, thereby being capable of being adjusted according to different use requirements.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (10)

1. The utility model provides a folding chair frame is equipped with two back bracing pieces that are located the rear in the folding chair frame, and the hypomere of back bracing piece forms the braced segment, and the upper segment of back bracing piece forms back section, its characterized in that: the upper end of the backrest section is connected with a lower connecting piece, an upper connecting piece is rotatably pivoted on the lower connecting piece, an extension rod is connected on the upper connecting piece, the upper connecting piece rotates towards the upper end direction of the backrest section relative to the lower connecting piece and forms an abutting limit after reaching the limit, the extension rod is supported above the backrest section and is positioned on the same horizontal line with the backrest section, and the extension rod is driven to retract downwards to lean against the side surface of the backrest section after the upper connecting piece reversely rotates relative to the lower connecting piece.

2. A folding chair as claimed in claim 1, wherein: the upper connecting piece and the lower connecting piece respectively comprise a circular joint formed at one end of a connecting pipe sleeve, the connecting pipe sleeve is connected at the upper end of the backrest section or the lower end of the extension rod, the circular joint of the upper connecting piece and the circular joint of the lower connecting piece are pivoted at the circle center, a baffle table is arranged at the end part of the connecting pipe sleeve, a slide way with a quarter of circumference is formed in the baffle table, the circular joint is positioned at one side of the slide way, and the circular joint of the upper connecting piece rotates in the slide way of the lower connecting piece in a homeotropic manner.

3. A folding chair as claimed in claim 2, wherein: the connecting pipe sleeve is inserted into the upper end of the backrest section or the lower end of the extension rod is internally fixed, a resisting plane is arranged at one end of the retaining table far away from the sleeve and positioned at one end of the slideway, and the resisting plane in the upper connecting piece is abutted against the resisting plane of the lower connecting piece to form limit when the upper connecting piece rotates to the upper part of the lower connecting piece.

4. A folding chair as claimed in claim 2 or claim 3, wherein: in the circular joint of the upper connecting piece or the lower connecting piece, one side which forms close rotation with the other circular joint is defined as an inner side surface, wherein an arc-shaped positioning convex particle is outwards convexly arranged in the circumference of the inner side surface of one circular joint, a positioning notch is correspondingly concavely arranged in the circumference of the inner side surface of the other circular joint, and the positioning convex particle is positioned in the positioning notch when the upper connecting piece and the lower connecting piece form close limiting.

5. A folding chair as claimed in claim 4, wherein: the inner side surface circumference of one circular connector is convexly provided with an annular convex edge, the inner side surface circumference of the other circular connector is concavely provided with a circumferential step part for inserting the annular convex edge, and the annular convex edge is limited in the circumferential step part to rotate.

6. A folding chair as claimed in claim 1, wherein: the folding chair frame comprises left and right symmetrical supporting frames, crossed supporting rod groups are rotatably pivoted between the front parts and the rear parts of the two supporting frames respectively, each supporting frame comprises a rear supporting rod, an inclined supporting rod, a sitting rod, a handrail rod and a handrail supporting rod, the upper ends of the inclined supporting rods are rotatably pivoted on a rear connecting piece, the lower ends of the handrail supporting rods are slidably connected on the rear supporting rods, the rear ends of the sitting rods are pivoted on the rear connecting piece, the front ends of the sitting rods are pivoted and supported on a front connecting seat fixed on the handrail supporting rods, the handrail rod is movably connected between the rear supporting rods and the handrail supporting rods positioned in front of the rear supporting rods, and the upper sections of the rear supporting rods, which are positioned above the sitting rods, form backrest sections.

7. A folding chair as claimed in claim 6, wherein: a group of rear cross supporting rod groups are pivoted between the rear parts of the two rear supporting rods, the upper ends of the two supporting rods in the rear cross supporting rod groups are respectively pivoted on the backrest section, and the upper connecting piece is connected above the pivoting part of the upper ends of the supporting rods in the rear cross supporting rod groups.

8. A folding chair as claimed in claim 7, wherein: a group of front cross supporting rod groups are pivoted between the front parts of the two rear supporting rods, the upper ends of the two supporting rods in the front cross supporting rod groups are respectively pivoted on a front connecting seat, the front connecting seat is connected to the armrest supporting rods, and the front ends of the sitting rods are arranged on the front connecting seats.

9. A folding chair as in claim 6, wherein: the front end of the handrail rod is provided with a connector, an inserting cavity is arranged below the connector, a socket is further arranged on the side wall of the inserting cavity, a clamping plate capable of being pulled is arranged in the socket, the clamping plate is provided with a clamping hole, the top of the handrail supporting rod is provided with a ball head, a clamping groove is arranged below the ball head, and the clamping hole is clamped in the clamping groove after the ball head passes through the clamping hole.

10. A folding chair as claimed in claim 9, wherein: the clamping plate is provided with a vertical plate and a horizontal plate, the vertical plate is vertically arranged at the end part of the horizontal plate, the horizontal plate is provided with a clamping hole, the horizontal plate is provided with a second waist-shaped hole, a locking piece is fixedly penetrated below the joint, and the locking piece is penetrated in the second waist-shaped hole; the outer side wall of the insertion cavity is concavely provided with a plate groove above the insertion opening, the plate groove is provided with a positioning column on the surface of the vertical plate, the positioning column is sleeved with a spring, the vertical plate is embedded in the plate groove, and the vertical plate compresses the spring when being pressed.