CN215752770U - Adjustable rear goods shelf of motorcycle - Google Patents

Abstract

The utility model relates to an adjustable rear goods shelf of a motorcycle, comprising: bearing platform and locating component, bearing platform has fixing base and sliding seat, the sliding seat is movably connected in the fixing base, make the sliding seat can move to primary importance or extended position, let bearing platform's whole length can the selectivity increase or shorten, and locating component is equipped with two setting elements and by the setting element between fixing base and sliding seat, wherein, when the sliding seat moves to primary importance or extended position, can connect in one of them setting element by the setting element, let the sliding seat can be fixed a position in primary importance or extended position, borrow this, connect in the setting element by the setting element and can be in order to let the sliding seat can't remove for the fixing base, and then when the motorcycle moved and produced the vibration, the sliding seat then can continuously keep at primary importance or extended position.

Description

Adjustable rear goods shelf of motorcycle

Technical Field

The utility model relates to an adjustable goods shelf capable of changing the whole length, in particular to an adjustable goods shelf applied to a motorcycle, which enables a user to adjust the whole length of the adjustable goods shelf according to the requirement, and the adjustable goods shelf can not randomly change the whole length when the motorcycle moves.

Background

Motorcycles are two-wheeled and three-wheeled vehicles that can be moved by an engine or a motor, and the motorcycle can change the moving direction by a steering handle, so that the motorcycle has the effects of easy operation, convenient parking and high maneuverability, and is the most popular vehicle at present.

Wherein, though general motorcycle is provided with storage box and running-board and supplies the user to place article, the motorcycle leads to storage box and running-board both's storage space can't satisfy in all users ' demand because the automobile body is less, and then when the motorcycle need place a large amount of article, all article all often can't all place in storage box's inside or on the running-board.

In order to make the motorcycle capable of carrying more or larger articles, a user can install a rear goods shelf at the rear of the motorcycle, however, the rear goods shelf capable of carrying bulky articles depends on the carrying area of the rear goods shelf, once the carrying area of the rear goods shelf is too small, the rear goods shelf cannot carry bulky or heavy articles, and once the carrying area of the rear goods shelf is too large, the transverse width or length of the motorcycle is increased, so that the motorcycle is too bulky.

SUMMERY OF THE UTILITY MODEL

The utility model aims to improve the structural style of the rear shelf, so that the rear shelf not only can change the overall length of the rear shelf according to the size of an article, but also can limit the overall length of the rear shelf even after the overall length of the rear shelf is changed, and the overall length of the rear shelf is not easy to change.

In order to achieve the above object, the present invention provides an adjustable rear luggage carrier of a motorcycle, which is mainly composed of a carrying platform and a positioning assembly.

The bearing platform is provided with a fixed seat and a movable seat, the fixed seat is provided with an installation space capable of accommodating the movable seat, the movable seat is movably connected with an original position of the fixed seat, so that the whole length of the bearing platform presents an original length, and the movable seat can be moved to an extended position to change the overall length of the bearing platform into an extended length with the length greater than the original length, the positioning component is provided with two positioning parts and a positioned part, the two positioning parts are arranged on one of the fixed seat and the movable seat, the positioned part is arranged on the other of the fixed seat and the movable seat, when the movable seat moves to the original position or the extended position, the positioned part is connected to one of the positioning parts, so that the movable seat cannot move freely relative to the fixed seat.

In this embodiment, the fixing base is provided with a through opening communicated with the installation space, the through opening is provided with an upper opening part positioned on the top surface of the fixing base and a side opening part positioned on the side surface of the fixing base, and the positioning assembly is provided with a guiding structure which can limit the movable base to pass through the side opening part when moving between the original position and the extended position.

In a preferred embodiment, the guiding structure has a guide rail and a sliding block, the guide rail is disposed on one of the fixed base and the movable base, and the sliding block is inserted into the guide rail and disposed on the other of the fixed base and the movable base.

In another preferred embodiment, the two positioning members are configured as positioning holes, the positioning assembly is configured with a guiding groove to communicate with each of the positioning holes, the positioned member is configured as a positioning protrusion capable of being engaged with the positioning hole, and the positioning protrusion can penetrate into the guiding groove, so that the positioning protrusion and the guiding groove together form the guiding structure.

In the two embodiments, the positioning element has a connecting arm and two clamping arms extending from two ends of the connecting arm, one of the clamping arms has an accommodating section formed on the connecting arm and a positioning section extending from the accommodating section and formed obliquely, a distance between the accommodating section and the other clamping arm is set to be an accommodating length with a length greater than the thickness of the positioned element, and a distance between the positioning section and the other clamping arm is set to be a positioning length with a length less than the thickness of the positioned element.

In addition, the positioning component is further provided with an auxiliary positioning part positioned between the two positioning parts, the auxiliary positioning part can be connected with the positioned part, the movable seat is stopped at an auxiliary extending position positioned between the original position and the extending position, and the whole length of the bearing platform has an auxiliary extending length with a length between the original length and the extending length.

Furthermore, the upper side of the fixed seat has a fixed carrying area, and the upper side of the movable seat has a movable carrying area with a height position the same as that of the fixed carrying area, wherein the installation space is a first space communicated with the through opening and a second space located inside the fixed seat, and the movable seat has a first movable portion located inside the first space and a second movable portion located inside the second space.

Finally, in another embodiment, the movable seat is pivotally connected to the fixed seat, so that the movable seat can move to the original position or the extended position along a swinging path.

The utility model has the advantages that when the movable seat can be selectively moved to the original position or the extended position to increase or decrease the overall length of the bearing platform, the positioned piece can be connected with one of the positioning pieces to position the movable seat at the original position or the extended position, so that the movable seat can not move relative to the fixed seat due to manual operation, and the overall length of the bearing platform can be limited by the mutual matching of the positioning pieces and the positioning pieces, therefore, a user can position the movable seat at a specific position only by operating the movable seat with bare hands, and does not need to additionally utilize other tools to position the movable seat at the specific position, even when the motorcycle moves to generate vibration, the movable seat can still be continuously kept at the original position or the extended position through the positioning assembly, and the movable seat can not move relative to the fixed seat.

Drawings

FIG. 1 is a schematic view of an adjustable shelf of the present invention mounted to a motorcycle;

FIG. 2 is an exploded view of an adjustable shelf according to a first preferred embodiment of the present invention;

FIG. 3 is a schematic view of the movable seat assembled to the fixed seat;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5A and 5B are schematic views of the movable seat at an original position;

FIG. 5C is a schematic view showing deformation of the first and second clamp arms contracting the positioned member;

FIG. 5D is a schematic view of the positioning member being positioned within the retracted positioned member;

FIGS. 6A and 6B are schematic views of the movable seat in an extended position;

FIG. 6C is a schematic view showing deformation of the first and second clamp arms of the elongated to-be-positioned member;

FIG. 6D is a schematic view of the positioning member positioned within the elongated positioned member;

FIG. 7 is an exploded view of an adjustable shelf according to a second preferred embodiment of the present invention;

FIG. 8 is a schematic view of the positioning member connected to the auxiliary positioning member;

FIGS. 9 and 10 are exploded views of an adjustable shelf according to a third preferred embodiment of the present invention;

fig. 11 and 12 are exploded views of an adjustable shelf according to a fourth preferred embodiment of the utility model.

Description of reference numerals: 1-adjustable goods shelves; 10-a load-bearing platform; 11-a fixed seat; 111-installation space; 111 a-a first space; 111 b-a second space; 112-a first fixed ride area; 113-a second fixed ride area; 114-through openings; 114 a-upper opening; 114 b-side opening part; 12-a movable seat; 121-a first movable part; 122-a second movable portion; 123-active ride area; 20-a positioning assembly; 21-a positioned part; 21 a-a locating post; 21 b-positioning bumps; 22-a positioning element; 22 a-original positioning clip; 22 b-an extension locator clip; 22 c-locating holes; 221-a linker arm; 222-a first clip arm; 222 a-a first housing section; 222 b-a first positioning segment; 222 c-a first guide segment; 223-a second clamp arm; 223 a-a second housing section; 223 b-a second positioning section; 223 c-a second guide section; 23-a sliding block; 24-a guide rail; 25-an auxiliary positioning element; 25 a-auxiliary positioning holes; 26-a guide groove; 30-a motorcycle; 31-cushion; l1-accommodated length; l2-positioning length; l3-original length; l4-extension length; l5-auxiliary extension length; m-a guide structure; p1-home position; p2-extended position; p3-auxiliary extended position.

Detailed Description

The utility model will be further described with reference to specific embodiments and drawings, the advantages and features of which will become apparent as the description proceeds.

Referring to fig. 1 and 2, the adjustable loading shelf 1 of the present invention is located at the rear side of a motorcycle 30, and, in a first preferred embodiment, the adjustable loading shelf 1 is mainly composed of a supporting platform 10 and a positioning assembly 20, as shown in the figure, the supporting platform 10 has two parts, namely a fixed seat 11 and a movable seat 12, the fixed seat 11 is fixedly connected to the motorcycle 30 to fix the fixed seat 11 relative to the motorcycle, wherein the fixed seat 11 is recessed from the rear to the front to form a mounting space 111 with a substantially rectangular appearance, and the upper side of the fixed seat 11 is provided with a first fixed loading area 112 with a height higher than the mounting space 111 and a second fixed loading area 113 with a height lower than the first fixed loading area 112, wherein the first fixed loading area 112 is used for contacting an object (not shown), and the second fixed loading area 113 is used for contacting a cushion 31 of the motorcycle 30, as shown in fig. 2 and 3, the fixing base 11 is recessed from the rear side of the first fixed loading area 112 to form a through opening 114 communicating with the installation space 111, and the contour of the through opening 114 is smaller than that of the installation space 111, wherein a partial area of the through opening 114 is disposed in the first fixed loading area 112 to form an upper opening 114a with an upward opening direction, a remaining area of the through opening 114 is disposed as a side opening 114b located at the rear side of the fixing base 11, the opening direction of the side opening 114b faces the rear side of the fixing base 11, a partial area of the installation space 111 is located right below the upper opening 114a to form a first space 111a communicating with the side opening 114b, and a remaining area of the installation space 111 is located in the fixing base 11 to form a second space 111b located at the front side of the first space 111 a.

Referring to fig. 2 and 3, the movable seat 12 of the supporting platform 10 has a first movable portion 121 and a second movable portion 122 having a thickness smaller than that of the first movable portion 121, wherein the upper side of the first movable portion 121 is configured as a movable loading area 123 capable of contacting the object, the positioning assembly 20 is located between the fixed seat 11 of the supporting platform 10 and the movable seat 12 of the supporting platform 10, the positioning assembly 20 has a positioned member 21 (as shown in fig. 5B), two positioning members 22, two sliding blocks 23 and two guide rails 24, wherein the positioned member 21 is configured as a positioning post 21a (as shown in fig. 5B) having a polygonal column shape, the positioned member 21 is disposed on the second movable portion 122 of the movable seat 12, and both positioning members 22 are disposed on the fixed seat 11, and both positioning members 22 are disposed in the first space 111a of the installation space 111, in this embodiment, the two positioning members 22 are spaced apart from each other, and one positioning member 22 is located in the central region of the fixing base 11 to serve as an original positioning clip 22a, and the other positioning member 22 is located close to the side opening 114b to serve as an extended positioning clip 22 b.

As shown in the drawings, the two sliding blocks 23 of the positioning assembly 20 are respectively disposed on opposite sides of the second movable portion 122, so that the positioning column 21a of the positioning assembly 20 is located between the two sliding blocks 23, in addition, the two guide rails 24 are arranged at intervals, and each guide rail 24 is disposed inside the installation space 111 of the fixing base 11, wherein the positioning element 22 of the positioning assembly 20 is located between the two guide rails 24, in this embodiment, each guide rail 24 is located inside the first space 111a of the assembly space.

Referring to fig. 4, both the original positioning clamp 22a and the extended positioning clamp 22b have a connecting arm 221, the connecting arm 221 is assembled to the fixing seat 11 of the supporting platform 10, and one end of the connecting arm 221 extends to form a first clamping arm 222 capable of deforming, and the other end of the connecting arm 221 forms a second clamping arm 223 capable of deforming, wherein the first clamping arm 222 is arranged at intervals on the second clamping arm 223, and the first clamping arm 222 has a first receiving section 222a formed on the connecting arm 221, and the first receiving section 222a extends from one end far from the connecting arm 221 toward a direction close to the second clamping arm 223 to form a first positioning section 222b, and the first positioning section 222b extends from one end far from the first receiving section 222a toward a direction far from the second clamping arm 223 to form a first guiding section 222c, wherein a partial section of the second clamping arm 223 is formed on the connecting arm 221 to be a second receiving section 223a located on one side of the first receiving section 222a, the remaining area of the second clamping arm 223 is provided with a second positioning section 223b extending from the second receiving section 223a toward the direction close to the first clamping arm 222 and a second guiding section 223c extending from the second positioning section 223b toward the direction far from the first clamping arm 222, as shown in the figure, the distance between the first receiving section 222a and the second receiving section 223a is provided with a receiving length L1 whose length is greater than the thickness of the to-be-positioned member 21, and the distance between the first positioning section 222b and the second positioning section 223b is provided with a positioning length L2 whose length is less than the thickness of the to-be-positioned member 21.

Referring to fig. 3, the movable seat 12 of the supporting platform 10 is disposed in the installation space 111 of the fixed seat 11, when the movable seat 12 is located in the installation space 111, the first movable portion 121 of the movable seat 12 is located in the first space 111a of the installation space 111, the second movable portion 122 of the movable seat 12 is located in the second space 111b of the installation space 111, the to-be-positioned member 21 of the positioning assembly 20 is located between the two positioning members 22 of the positioning assembly 20, and the two sliding blocks 23 of the positioning assembly 20 penetrate into one of the guide rails 24 of the positioning assembly 20 one by one, so that the movable seat 12 is movably connected to the fixed seat 11, and the movable seat 12 can move relative to the fixed seat 11, wherein when the first movable portion 121 is located in the first space 111a, the movable carrying area 123 of the movable seat 12 is aligned with the first fixed carrying area 112 of the fixed seat 11, in this embodiment, the two sliding blocks 23 respectively penetrate the guide rails 24 to form a guiding structure M together, and the guiding structure M is used to limit the movable seat 12 to pass through the side opening 114b of the through opening 114 when moving, so that the movable seat 12 cannot pass through the upper opening 114a of the through opening 114 through the guiding structure M.

Referring to fig. 5A, 5B, 5C and 5D, the movable seat 12 of the supporting platform 10 is pushed to move the movable seat 12 along the direction of the arrow in the drawings through the guiding structure M, so that the positioning pillar 21a of the positioning assembly 20 is gradually close to the original positioning clip 22a of the positioning assembly 20, the moving movable seat 12 can change the relative position between the positioning pillar 21a, the original positioning clip 22a and the extended positioning clip 22B, when the positioning pillar 21a touches the first guiding section 222C of the original positioning clip 22a or the second guiding section 223C of the original positioning clip 22a, the positioning pillar 21a can move into between the first clamping arm 222 and the second clamping arm 223 of the original positioning clip 22a, and because the positioning length L2 of the original positioning clip 22a is smaller than the thickness of the positioning pillar 21a, the positioning pillar 21a can push against the first clamping arm, the second clamping arm 222 and the second clamping arm 223 of the original positioning clip 22a, The two positioning sections 222b, 223b, and thus the first clamping arm 222 of the original positioning clamp 22a is deformed toward the direction away from the second clamping arm 223 of the positioning member 22, and at the same time, the second clamping arm 223 of the original positioning clamp 22a is deformed toward the direction away from the first clamping arm 222 of the positioning member 22, so that the positioning column 21a can move into the space between the first and second receiving sections 222a, 223a of the original positioning clamp 22a, wherein when the positioning column 21a is located between the first and second receiving sections 222a, 223a of the original positioning clamp 22a, the first and second clamping arms 222, 223 of the original positioning clamp 22a are deformed inward to approach each other, so that the first and second clamping arms 222, 223 of the original positioning clamp 22a return to the original shape, and the first and second positioning sections 222b, 223b of the original positioning clamp 22a can limit the positioning column 21a to stay in the first and second clamping arms 223 of the original positioning clamp 22a, Between the two receiving sections 222a, 223a, the movable seat 12 can be located at an original position P1, at this time, the first movable portion 121 of the movable seat 12 is located in the first space 111a of the installation space 111, and the second movable portion 122 of the movable seat 12 is located in the second space 111b of the installation space 111 at the same time, so that the movable carrying area 123 of the movable seat 12 can be close to the first fixed carrying area 112 of the fixed seat 11 to shorten the overall length of the platform 10, and the overall length of the platform 10 is the original length L3.

Referring to fig. 6A, 6B, 6C and 6D, the movable seat 12 of the supporting platform 10 is pulled to make the movable seat 12 linearly move along the arrow direction in the drawing through the guiding structure M to change the relative position between the positioned part 21 and the two positioning parts 22, so that the positioning column 21a of the positioning component 20 gradually approaches the extending positioning clip 22B of the positioning component 20, wherein during the process that the positioning column 21a approaches the extending positioning clip 22B, the first movable part 121 of the movable seat 12 protrudes out of the installation space 111 of the fixed seat 11 through the through opening 114 of the fixed seat 11, and the second movable part 122 of the movable seat 12 moves into the first space 111a of the installation space 111 from the second space 111B of the installation space 111, so that the second movable part 122 can be exposed out of the supporting platform 10 through the through opening 114 of the fixed seat 11, wherein, when the positioning post 21a touches the first guiding section 222c of the extending positioning clip 22b or the second guiding section 223c of the extending positioning clip 22b, the positioning post 21a is pressed against the first and second positioning sections 222b, 223b of the extending positioning clip 22b, so that the first and second clamping arms 222, 223 of the extending positioning clip 22b are deformed to allow the positioning post 21a to move into between the first and second accommodating sections 222a, 223a of the extending positioning clip 22b, at this time, the first and second positioning sections 222b, 223b of the extending positioning clip 22b can limit the positioning post 21a to stay between the first and second accommodating sections 222a, 223a of the extending positioning clip 22b, so that the movable seat 12 can be located at an extending position P2 to increase the overall length of the supporting platform 10, so that the overall length of the supporting platform 10 is changed to an original length L4 which is greater than the original length L3, as shown in the figure, when the movable seat 12 is located at the extending position P2, a portion of the first movable portion 121 protrudes outward from the mounting space 111.

Referring to fig. 7, in the second preferred embodiment, the difference from the first preferred embodiment is that the contour of the through opening 114 is substantially the same as the installation space 111 of the fixing base 11, so that the first and second spaces 111a and 111b of the installation space 111 are both communicated with the through opening 114, and the overall thickness of the movable base 12 is substantially the same, so that the thickness of the first movable portion 121 is the same as the thickness of the second movable portion 122, in addition, the positioning assembly 20 is composed of a positioning member 21, two positioning members 22, an auxiliary positioning member 25 and a guiding groove 26, wherein the positioning member 21 is a positioning protrusion 21b, the two positioning members 22 of the positioning assembly 20 are both positioning holes 22c, the auxiliary positioning member 25 is an auxiliary positioning hole 25a, the auxiliary positioning member 25 is located between the two positioning members 22, and the guiding groove 26 is simultaneously communicated with the two positioning holes 22c and the auxiliary positioning hole 25a, the positioning protrusion 21b and the guiding groove 26 together form a guiding structure M.

Referring to fig. 8, the movable seat 12 of the loading platform 10 moves relative to the fixed seat 11 of the loading platform 10, so that the positioning projection 21b of the positioning member 20 moves along the guide groove 26 of the positioning member 20, when the positioning protrusion 21b moves into the auxiliary positioning hole 25a, the movable seat 12 stays at an auxiliary extending position P3 between the original position P1 and the extending position P2 to change the overall length of the supporting platform 10, thereby allowing the overall length of the supporting platform 10 to have an auxiliary extending length L5 between the original length L3 and the extending length L4, and thus seat 12, can remain in different positions to allow for a variety of changes in the overall length of load-bearing platform 10, however, in this embodiment, the auxiliary positioning member 25 is provided as one auxiliary positioning hole 25a for convenience of description, that is, the auxiliary positioning member 25 may be provided as a plurality of auxiliary positioning holes 25 a.

Referring to fig. 9 and 10, the difference between the third preferred embodiment and the second preferred embodiment is that the positioning assembly 20 does not have the guiding groove 26, so that the two positioning holes 22c and the auxiliary positioning hole 25a are arranged at intervals, and the positioning bump 21b of the positioning assembly 20 can deform by being pressed, as shown in the figure, in the process that the positioned piece 21 approaches the auxiliary positioning hole 25a from the original position P1 or the extended position P2, the fixing base 11 will be pressed against the positioning bump 21b to deform the positioning bump 21b, and when the positioning bump 21b is aligned with the auxiliary positioning hole 25a, the positioning bump 21b will return to the original shape, so that the positioning bump 21b can penetrate into the auxiliary positioning hole 25a, and the movable base 12 can stay at the auxiliary extended position P3.

Referring to fig. 11 and 12, in the fourth preferred embodiment, the difference from the first preferred embodiment lies in the connection relationship between the fixed base 11 of the platform 10 and the movable base 12 of the platform 10, in this embodiment, the movable base 12 is pivoted to the fixed base 11, so that the movable base 12 can move to the original position P1 or the extended position P2 through a swinging path.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. An adjustable rear carrier for a motorcycle, comprising:

the bearing platform is provided with a fixed seat and a movable seat, the fixed seat is provided with an installation space capable of accommodating the movable seat, and the movable seat is movably connected to an original position of the fixed seat, so that the whole length of the bearing platform presents an original length, and the movable seat can move to an extended position, and the whole length of the bearing platform is changed into an extended length with the length larger than the original length; and

the positioning assembly is provided with two positioning parts and a positioned part, the two positioning parts are arranged on one of the fixed seat and the movable seat, and the positioned part is arranged on the other of the fixed seat and the movable seat;

when the movable seat moves to the original position or the extended position, the positioned part is connected to one of the positioning parts, so that the movable seat cannot move freely relative to the fixed seat.

2. The adjustable rear carrier for motorcycles as claimed in claim 1, wherein said positioning member has a connecting arm and two clamping arms extending from both ends of said connecting arm, one of said clamping arms has a receiving section formed on said connecting arm and a positioning section extending obliquely from said receiving section, and a distance between said receiving section and the other of said clamping arms is set to a receiving length longer than a thickness of said positioned member, and a distance between said positioning section and the other of said clamping arms is set to a positioning length shorter than the thickness of said positioned member.

3. The adjustable rear cargo rack of motorcycle as claimed in claim 1, wherein the positioning assembly has an auxiliary positioning member disposed between the two positioning members, the auxiliary positioning member being capable of being connected to the positioning member to allow the movable seat to stay at an auxiliary extending position between the original position and the extending position, and the entire length of the carrying platform has an auxiliary extending length between the original length and the extending length.

4. The adjustable rear carrier for motorcycles as claimed in claim 1, wherein said fixed seat has a fixed riding area on an upper side thereof, and said movable seat has a movable riding area on an upper side thereof at a height position identical to that of said fixed riding area.

5. The adjustable rear cargo rack of motorcycle as claimed in claim 1, wherein the fixing base has a through opening communicating with the installation space, the through opening has an upper opening portion at a top surface of the fixing base and a side opening portion at a side surface of the fixing base, and the positioning member has a guiding structure capable of restricting the movable base from passing through the side opening portion when moving between the original position and the extended position.

6. The adjustable rear carrier of motorcycle as claimed in claim 5, wherein the guiding structure has a guide rail and a sliding block, the guide rail is disposed on one of the fixed seat and the movable seat, and the sliding block is inserted into the guide rail and disposed on the other of the fixed seat and the movable seat.

7. The adjustable rear carrier of motorcycle as claimed in claim 5, wherein the two positioning members are each a positioning hole, the positioning member has a guiding groove for communicating with each positioning hole, the positioned member is a positioning protrusion capable of engaging with the positioning hole, and the positioning protrusion is capable of penetrating into the guiding groove, so that the positioning protrusion and the guiding groove together form the guiding structure.

8. The adjustable rear carrier of motorcycle as claimed in claim 5, wherein the installation space is a first space communicating with the through opening and a second space located inside the fixed seat, and the movable seat has a first movable portion located inside the first space and a second movable portion located inside the second space.

9. The adjustable rear carrier of a motorcycle of claim 8, wherein when the movable seat is moved to the extended position, the second movable portion is movable from the second space toward the first space such that the second movable portion is exposed to the load-bearing platform through the through opening.

10. The adjustable rear carrier for motorcycles as claimed in claim 1, wherein said movable seat is pivotally connected to said fixed seat so that said movable seat can move to said original position or said extended position through a swing path.

Images