TWI527971B - Roof luggage rack lock structure - Google Patents

Description

Roof luggage rack locking structure

The locking structure of the roof rack of the present case relates to a type of luggage rack that can be finely adjusted to match the vehicle roof to make it stable.

Most of the vehicles currently on the market have roof racks that can be used to carry bicycles, surfboards, luggage, etc. However, not all models are equipped with a roof rack. For vehicles without a roof rack, a roof rack mount is required to mount the roof rack to the roof of the vehicle.

For the roof frame fixing seat of (1), please refer to the TWM285499 patent, which is provided with a fixing seat on the roof, and then uses the fixing member of the fixing seat and the adjusting bolt to drive a plate displacement, thereby the roof frame. The clamping is fixed between the fixing seat and the abutting plate; however, since the fastener is directly connected between the adjusting bolt and the abutting plate, the labor saving effect cannot be achieved.

For the use of the roof mounts of (2), please refer to the TWM394933 patent, which can be installed on the top of the vehicle and erected with crossbars to further secure other luggage. However, such roof mounts are subject to The structural limitation can only be applied to a vehicle body of a fixed size. If the size of the vehicle body changes greatly, there will be a situation in which it is not easy to buckle.

In view of this, the inventors have developed a new "car roof rack locking structure" based on years of experience in the industry and multi-party testing.

The roof luggage rack locking structure of the invention is designed to be suitable for a stable and labor-saving locking luggage rack of various types of vehicles.

The roof luggage rack locking structure of the invention comprises a seat body, a foot seat, a cover body, a limiting body, an adjusting structure, a clamping structure and an anti-theft structure, wherein the foot seat is composed of a rotating seat, a soft seat and a joint. The spherical edge of the joint is placed in the through hole of the rotating seat, and the rotating seat and the soft seat are combined to form a foot. The adjusting structure comprises a frame body, a positioning member and an adjusting bolt, and the clamping structure comprises abutting piece, a connecting piece and a buffering part. , clamping member, moving member, linking member and adjusting bolt, anti-theft structure, including the clamping member and the locking head; the footrest is fixed at the bottom of the seat body, so that the locking member and the locking head of the anti-theft structure are respectively matched It is disposed on the side of the seat body and the cover body, so that the frame body lug of the adjustment structure is placed in the limiting body, so that the arc hole of the lug is opposite to the horizontal bar hole of the limiting body, and the pin insertion hole has a transverse screw hole. The frame body and the limiting body are combined to be movable, and a plug with a transverse screw hole is inserted into the through hole below the limiting body, so that the abutting piece of the clamping structure is placed on the outer side of the limiting body, and the abutting piece is convex. The through hole of the ear is aligned with the oblique hole of the limiting body, and the rivet is riveted to make the abutment and the limit The combination of activities causes the limiting body to be placed in the seat body, so that the positioning member of the adjusting structure is locked in front of the seat body, and the adjusting bolt of the adjusting structure is inserted through the middle through hole of the setting member, and then the buckle is buckled and then screwed on The transverse screw hole of the top pin of the limiting body is such that the two ends of the connecting member of the clamping structure are respectively placed in the circular groove of the buffering member and the through hole of the abutting piece, so that the transverse through hole of the rivet through the buffering member and the transverse direction of the connecting member are transversely penetrated The hole is arranged such that the buffering member, the moving member and the clamping member are arranged, so that the buffering member and the moving member are placed in the elliptical hole of the clamping member, so that the linking member is placed in the arc opening at the rear of the moving member, so that an adjusting bolt is worn. After the through hole of the connecting member is screwed to the transverse screw hole of the bolt below the limiting body, the locking structure of the roof rack is completed.

Therefore, with the above structure of the present invention, it has the following advantages:

1. According to the invention, the adjusting bolt of the clamping structure can be used to move and clamp the clamping structure. The piece, the cushioning member, the connecting piece and the abutting piece are displaced upwards and upwards, and the clamping piece can clamp the roof of the automobile. When the adjusting bolt is reversed, the moving part and the clamping piece of the clamping structure can be When the cushioning member, the connecting member and the abutting piece are displaced downward and outward, the clamping member releases the roof, which is convenient and labor-saving.

2. The clamping structure of the present invention can be moved up and down in the inclined strip hole of the limiting body by adjusting the rotation of the bolt, so that the clamping structure stays at any position within the distance of the inclined strip hole. In order to adjust the tightness of the clamps in accordance with various types of vehicles, the present invention can be applied to various types of vehicles.

3. The invention is provided with flanges on both sides of the rotating seat top surface of the foot seat, so that when the invention is locked on the roof of the vehicle, the flange is pressed against the bottom surface of the seat body to make the locking more stable and avoid loosening.

4. The invention has a universally rotatable foot on the bottom of the seat body, and the angle of the foot seat can be arbitrarily adjusted to match the inclination and curvature of the roof, so no matter what kind of vehicle is installed, Smooth device.

5. The invention is provided with an anti-theft structure in the seat body and the cover body. When the invention is fixed and fixed on the roof of the vehicle, the cover cover can be combined and locked to prevent theft of the thief, and the user is more comfortable.

〔this invention〕

(1) ‧ ‧ ‧ body

(10) ‧‧‧ accommodating slots

(11) ‧‧‧ displacement trench

(12)‧‧‧Connected ears

(13)‧‧‧ Rivets

(2) ‧‧‧ feet

(20)‧‧‧ Rotating seat

(201) ‧‧‧through holes

(202)‧‧‧Flange

(21)‧‧‧Soft seat

(22)‧‧‧Connectors

(220) ‧‧‧spherical edge

(3) ‧ ‧ cover

(30) ‧‧‧Locking edge

(31)‧‧‧Connected ears

(4) ‧‧‧Limited bodies

(40) ‧‧‧ horizontal bars

(41) ‧‧‧through holes

(42) ‧‧‧ diagonal bars

(43) ‧‧‧Latch

(430)‧‧‧Transverse screw holes

(44) ‧‧‧Latch

(440)‧‧‧Transverse screw holes

(45)‧‧‧ Rivets

(5) ‧ ‧ adjustment structure

(50) ‧‧‧ frame

(502) ‧ ‧ lugs

(503)‧‧‧Arc holes

(51)‧‧‧ Positioning body

(510) ‧‧‧through holes

(511) ‧‧‧through holes

(52) ‧ ‧ adjusting bolts

(53)‧‧‧ screws

(54) ‧‧‧ buckle

(6)‧‧‧Clamping structure

(60) ‧‧‧

(600)‧‧‧ holes

(601)‧‧‧through holes

(602) ‧ ‧ lugs

(603) ‧‧‧through holes

(61)‧‧‧Links

(610)‧‧‧Transverse through holes

(62) ‧‧‧ cushioning parts

(620)‧‧‧•Shrapnel

(621)‧‧‧ Round slot

(622)‧‧‧Transverse through holes

(63)‧‧‧Clip components

(630)‧‧‧Clamping end

(631)‧‧‧Elliptical hole

(64)‧‧‧Mobile parts

(640) ‧‧‧Flange

(641)‧‧‧Arc opening

(65)‧‧‧ linkages

(650)‧‧‧through holes

(66)‧‧‧ Adjusting bolts

(67)‧‧‧ Rivets

(7) ‧ ‧ security structure

(70) ‧‧‧ Cards

(71)‧‧‧Locks

(72)‧‧‧ screws

Figure 1 is a perspective view of the invention (opening)

Figure 2 is a perspective exploded view of the present invention (1) (opening)

Figure 3 is a perspective exploded view of the present invention (2) (opening)

Figure 4 is a cross-sectional view of the A-A of the present invention (opening)

Figure 5 is a schematic view of the action of the A-A section of the present invention (1) (opening)

Figure 6 is a schematic view of the action of the A-A section of the present invention (2) (closed)

Figure 7 is a three-dimensional combination diagram of the present invention (closed)

Figure 8 is a schematic view of the action of the A-A section of the present invention (3) (closed)

The roof luggage rack locking structure of the present invention (see FIG. 1-4) mainly includes a seat body (1), a foot seat (2), a cover body (3), a limiting body (4), The adjusting structure (5), the clamping structure (6) and the anti-theft structure (7), wherein the seat body (1) has a space for the limiting body (4), the adjusting structure (5) and the clamping structure (6) The accommodating groove (10) has a displacement groove (11) at the top, the displacement groove (11) is in communication with the accommodating groove (10); the foot seat (2) is a rotating seat (20), a soft seat (21) and the joint (22), wherein the top of the rotating base (20) has a through hole (201) combined with the joint (22), and a flange (202) is provided on each of the top sides of the top surface to make the joint (22) The spherical edge (220) is placed in the through hole (201) of the rotating base (20), and the rotating base (20) is closed with the soft seat (21); the cover body (3) has an inner side thereof The lock is placed at the edge (30), the other side is provided with a connecting ear (31), the limiting body (4) is a squat type, and the outer side is provided with an inclined surface, and the tops of the two sides are respectively provided with corresponding horizontal a hole (40) having a corresponding through hole (41) at the bottom, and a corresponding oblique hole (42) between the horizontal hole (40) and the through hole (41); adjusting structure (5) , including The body (50), the positioning member (51) and the adjusting bolt (52), wherein the lower portion of the frame body (50) is provided with two lugs (502), and the lugs (502) are provided with corresponding arc holes (503) The positioning member (51) has a through hole (510) through which the adjusting bolt (52) is disposed at the center, and the through hole (510) is provided with a through hole (511) for locking on both sides; the clamping structure ( 6), comprising a resisting piece (60), a connecting piece (61), a cushioning member (62), a clamping member (63), a moving member (64), a linking member (65) and an adjusting bolt (66), wherein The piece (60) is set to have the same inclination as the outer side of the limiting body (4), and is placed against An inclined surface on the outer side of the limiting body (4) is provided with a strip hole (600) at a lower portion thereof, and a through hole (601) through which the connecting member (61) is inserted is disposed above the hole (600), and both sides thereof are respectively A lug (602) is provided, the lug (602) has a through hole (603), a connecting member (61) having a lateral through hole (610) at a side thereof and a cushioning member (62), the inner side of which is fitted The sheet (60) has a sloped surface with a spring piece (620) at the top, a circular groove (621) for the connection member (61) at the center, and a lateral direction communicating with the circular groove (621) at the side. The through hole (622), the clamping member (63), the lower portion of which has a clamping end (630) for clamping the roof of the automobile, and the upper portion is provided with an ellipse for the buffering member (62) and the moving member (64) a hole (631), a moving member (64), the cover is disposed outside the clamping member (63), and has a flange inserted therein into the elliptical hole (631) of the clamping member (63) ( 640), the inner side surface is provided with a sloped surface with the inclination of the abutting piece (60), and the lower part of the outer side surface is provided with an arcuate opening (641) for inserting the linking member (65), and a linking member (65). Is placed in the moving member (64), has a through hole (650) for the adjusting bolt (66) to pass through the center; and an anti-theft structure (7), The clamping member (70) and the locking member (71) are respectively locked with screws (72) on one side of the seat body (1), and the locking head (71) is assembled on the cover body. (3) The lock is placed in the edge (30), so that after the cover (3) is closed, the latch (70) can be inserted into the lock (30) of the cover (3). (71) Corresponding.

The cover body (3) is joined with the other engaging ear (12) by the rivet (13) with the engaging ear (31) on one side and then engaged with the engaging ear of the seat body (1), then the cover body (30) When the cover is closed, the lock head (71) can be locked by the latching member (70) to prevent theft, so that the foot seat (2) is locked at the bottom of the seat body (1), so that the rotating seat (20) The top flange (202) bears against the bottom surface of the seat body (1), and the seat body (1) can be supported by the foot (2) spherical edge (22) 0) For various angle adjustments, the lug (502) under the frame (50) of the adjustment structure (5) is placed in the limiting body (4) so that the arc hole (503) of the lug (502) is After the horizontal strip holes (40) of the limiting body (4) are aligned, the pins (3) having the transverse screw holes (430) are inserted into the opposite arc holes (503) and the horizontal strip holes (40). The frame body (50) is combined with the limiting body (4), and a pin (44) with a transverse screw hole (440) is inserted into the through hole (41) under the limiting body (4) to make the clamping structure (6) The abutting piece (60) abuts against the inclined surface on the outer side of the limiting body (4), and the through hole (603) of the tab (60) lug (602) and the diagonal strip of the limiting body (4) The holes (42) are aligned, and the rivets (45) are riveted to combine the two activities, so that the frame body (4) combined with the frame body (50) and the abutting piece (60) is placed in the seat body (1). The groove (10) is placed, and the top of the frame body (50) falls behind the top displacement groove (11) of the seat body (1), so that the positioning member (51) of the adjustment structure (5) is placed on the top of the seat body (1). In front of the displacement groove (11), the screw (53) is inserted through the locking through hole (511) on both sides of the positioning member (51), and then locked to the seat body (1), so that the adjusting bolt (52) is set. The middle through hole (510) of the position piece (51) is buckled with a buckle (54), and then screwed The transverse screw hole (430) of the pin (43) at the top of the limiting body (4) is inserted, and one end of the connecting member (61) of the clamping structure (6) is placed in the circular groove (621) of the buffering member (62). The other end is inserted through the through hole (601) of the abutting piece (60), and the lateral through hole (610) of the connecting piece (61) is aligned with the lateral through hole (622) of the buffering member (62), When the rivet (67) is riveted, the cushioning member (62) will just sit on the outer side of the abutting piece (60), and the top edge of the clamping piece (63) is placed on the elastic piece (620) at the top of the cushioning member (62). Bottom, and the top surface of the rear portion of the cushioning member (62) is clamped to the top edge of the elliptical strip hole (631) of the clamping member (63), so that the moving member (64) is sleeved on the clamping member (63), so that Its internal flange (6 40) falling under the elliptical strip hole (631) of the clamping member (63), the top surface of the moving member (64) just abuts against the bottom surface of the cushioning member (62), and the linking member (65) is placed on the moving member (64) The rear curved opening (641) allows the adjusting bolt (66) to sequentially pass through the through hole (650) of the linking member (65), the flange (640) of the moving member (64), and the strip (60). After the hole (600) is screwed to the lateral screw hole (440) of the insertion pin (44) inserted in the through hole (41) below the limiting body (4), the locking structure of the roof rack is completed; when the clamping structure ( 6) In the un-clamped state, the abutting piece (60), the connecting piece (61), the cushioning member (62), the clamping member (63) and the linking member (64) are located below the seat body (1). The adjusting bolt (66) has a higher end with the pin (43) of the limiting body (4) and a lower inclined state at the other end.

When in use (please refer to Figures 5-7), when the present invention is to be assembled on the roof of a car, the universally rotating foot (2) is placed on the roof at an angle to the roof, and After adjusting the seat body (1) to make it stable, the clamping end (630) of the clamping piece (63) is hooked on the roof, and the opening body (3) is turned to adjust the adjusting bolt (66), because the adjusting bolt (66) One end cooperates with the lateral screw hole (440) of the bottom pin (44) of the limiting body (4), so when the adjusting bolt (66) is rotated, the bolt (44) also rotates in the opposite direction, and the adjusting bolt (66) is compliant. When turning, the mating end of the adjusting bolt (66) and the bolt (44) will be gradually displaced downward due to the reversal of the bolt (44), and the adjusting bolt (66) will use the bolt (44) as a fulcrum to make it and the linkage ( 65) When one end is displaced upward, and the end is displaced upward, the adjusting bolt (66) drives the linking member (65) to rotate in the arcuate opening (641) of the moving member (64), and adjusts When the bolt (66) and the linking member (65) are combined to move up one end, the moving member (64), the clamping member (63) and the cushioning member (6) of the locking structure (6) are 2), the connecting member (61) and the abutting piece (60) are topped so as to be displaced upwardly against the inclined surface on the outer side of the limiting body (4) to the upper position of the seat body (1), and due to the limit position The outer side of the body (4) is inclined so that when the above components of the locking structure (6) are moved up, the clamping member (63) is also displaced to the inside, and the car roof is clamped, and after the clamping is completed, The rotating body (20) can be supported by the top surface flange (202) against the seat body (1) so that the clamping jaw is more stable and not loose, and the cover body (3) is closed by rotating the lock head (71). The latching member (70) can be locked by the latching member (70); when the adjusting bolt (66) is reversed, the mating end of the adjusting bolt (66) and the latch (44) is gradually rotated by the latch (44). Displace upward, adjust the bolt (66) and use the pin (44) as a fulcrum to move the other end down, so that the clamping structure (6) moves down to the lower part of the seat (1), then the clamp The piece (63) moves to the outside to relax the state in which the roof is unfolded.

When the clamping structure (6) is displaced up and down, the adjusting bolt (66) is such that the two ends thereof are supported by the bolt (44), and the upper part of the hole (600) provided by the abutting piece (60) is upper. The alternate action of the next activity.

When the moving member (64), the clamping member (63), the cushioning member (62), the connecting member (61) and the abutting piece (60) of the clamping structure (6) are adjusted to be displaced up and down, the abutting piece (60) The rivet (45) of the lug (602) that is coupled to the movable body (4) is displaced in the oblique hole (42) of the limiting body (4), thereby limiting the clamping structure ( 6) The displacement distance is such that the clamping structure (6) can finely adjust the clamping position within the range of the oblique hole (42) of the limiting body (4) to match various types of vehicle types. To achieve the most tight clamping (as shown in Figures 5 and 8).

(1) ‧ ‧ ‧ body

(10) ‧‧‧ accommodating slots

(11) ‧‧‧ displacement trench

(12)‧‧‧Connected ears

(13)‧‧‧ Rivets

(2) ‧‧‧ feet

(20)‧‧‧ Rotating seat

(201) ‧‧‧through holes

(202)‧‧‧Flange

(21)‧‧‧Soft seat

(22)‧‧‧Connectors

(220) ‧‧‧spherical edge

(3) ‧ ‧ cover

(30) ‧‧‧Locking edge

(31)‧‧‧Connected ears

(4) ‧‧‧Limited bodies

(40) ‧‧‧ horizontal bars

(41) ‧‧‧through holes

(42) ‧‧‧ diagonal bars

(43) ‧‧‧Latch

(430)‧‧‧Transverse screw holes

(44) ‧‧‧Latch

(440)‧‧‧Transverse screw holes

(45)‧‧‧ Rivets

(50) ‧‧‧ frame

(502) ‧ ‧ lugs

(503)‧‧‧Arc holes

(51)‧‧‧ Positioning parts

(510) ‧‧‧through holes

(511) ‧‧‧through holes

(52) ‧ ‧ adjusting bolts

(53)‧‧‧ screws

(54) ‧‧‧ buckle

(6)‧‧‧Clamping structure

(60) ‧‧‧

(600)‧‧‧ holes

(601)‧‧‧through holes

(602) ‧ ‧ lugs

(603) ‧‧‧through holes

(61)‧‧‧Links

(610)‧‧‧Transverse through holes

(62) ‧‧‧ cushioning parts

(620)‧‧‧•Shrapnel

(622)‧‧‧Transverse through holes

(63)‧‧‧Clip components

(630)‧‧‧Clamping end

(631)‧‧‧Elliptical hole

(64)‧‧‧Mobile parts

(640) ‧‧‧Flange

(641)‧‧‧Arc opening

(65)‧‧‧ linkages

(650)‧‧‧through holes

(66)‧‧‧ Adjusting bolts

(67)‧‧‧ Rivets

(70) ‧‧‧ Cards

(71)‧‧‧Locks

(72)‧‧‧ screws

Claims (8)

The utility model relates to a roof luggage rack locking structure, which comprises a seat body, a foot seat, a cover body, a limiting body, an adjusting structure, a clamping structure and an anti-theft structure, wherein: the top of the seat body has a displacement groove, and the displacement groove is The accommodating groove is connected to the inside of the seat body, and the accommodating groove is provided for the adjusting structure and the clamping structure, and one side of the seat body is movably combined with the side of the cover body, so that the cover body can be covered with the seat body, and the bottom of the seat body Combined with the foot activity; the limiting body has corresponding horizontal strip holes at the tops of the two sides, and corresponding corresponding through holes at the bottom, and corresponding oblique strip holes between the horizontal strip holes and the through holes The adjusting structure comprises a frame body, a positioning member and an adjusting bolt, wherein the lower part of the frame body is provided with two lugs, the lug is provided with a corresponding arc hole, and the positioning member has a through hole for the adjusting bolt to be inserted. Each of the through holes is provided with a through hole for locking; the clamping structure comprises a pressing piece, a connecting piece, a buffering piece, a clamping piece, a moving part, a linking piece and an adjusting bolt, wherein the abutting piece is arranged a strip hole is arranged on the outer side of the limiting body, and a hole is arranged above the middle of the limiting hole The lugs of the through holes are provided on both sides thereof, and the side of the connecting member has a transverse through hole, the center of the cushioning member has a circular groove for the connecting member, and the lateral side has a transverse through hole communicating with the circular groove, the clamping The piece is provided with an elliptical hole for the buffer member and the moving member, and the movable member cover is disposed outside the clamping member, and the inner side has a flange inserted in the hole of the elliptical strip of the clamping member, and the lower portion of the outer side surface is provided An arc-shaped opening for inserting the linking member, the center of the linking member has a through hole for the adjusting bolt to be pierced; the anti-theft structure is disposed at a proper position with the seat body and the cover body; and the frame body lug of the adjusting structure is placed in the limit In the body, after the arc hole of the lug is aligned with the horizontal hole of the limiting body, the latch with the transverse screw hole is inserted to make the frame body and the limiting body move in motion. Inserting another transverse screw hole into the through hole below the limiting body, so that the abutting piece of the clamping structure is placed on the outer side of the limiting body, and the through hole of the abutting lug and the oblique hole of the limiting body The aligning is performed by rivet riveting to combine the contact piece and the limiting body, so that the limiting body is placed in the seat body, and the positioning member of the adjusting structure is locked in front of the seat body, so that the adjusting bolt of the adjusting structure is worn through the setting member. After the middle through hole is fastened with a buckle, and then screwed to the transverse screw hole of the top pin of the limiting body, the two ends of the connecting member of the clamping structure are respectively placed in the circular groove of the buffering member and the through hole of the abutting piece, so that the rivet The transverse through hole of the buffering member and the transverse through hole of the connecting member are disposed, so that the buffering member, the moving member and the clamping member are assembled and placed in the elliptical hole of the clamping member, so that the linking member is placed in the rear arc of the moving member The shape of the opening is such that the adjusting bolt of the clamping structure sequentially passes through the through hole of the linking member, the flange between the moving member and the hole of the abutting piece, and then is screwed to the horizontal screw hole of the pin below the limiting body to complete the roof baggage Frame locking structure. The roof luggage rack locking structure according to claim 1, wherein the foot base is composed of a rotating seat, a soft seat and a joint, wherein the top of the rotating seat is provided with a flange to support the bottom of the seat body, and the joint has The spherical edge can be forced into the through hole of the rotating seat, and the rotating seat is covered with the soft seat, so that the foot seat is locked at the bottom of the seat body, and the seat body can be adjusted by various angles of the ball ball edge. The roof luggage rack locking structure according to claim 1, wherein the anti-theft structure comprises a latching member and a locking head, and the latching member and the locking latching system are respectively disposed on the same side of the base body and the cover body. The cover is closed, and the lock can be clamped to the latch, so that the cover cannot be opened and theft can be prevented. The locking structure of the roof rack according to claim 1, wherein one side of the limiting body and the abutting piece are inclined surfaces, and the clamping piece, the buffering part and the moving part of the clamping structure are One side of the limiting body is arranged to have the same inclined surface as the limiting body, and the locking structure is moved according to the path of the inclined surface of the limiting body when the upper and lower parts are displaced, and the clamping member can be clamped inward.掣 or relax. For example, the roof luggage rack locking structure described in claim 1 of the patent scope, wherein the adjustment of the clamping structure When the bolt rotates, the bolt at the bottom of the matching body is reversed, and the adjusting bolt and the pin engaging end are lowered, and the adjusting bolt is used as a fulcrum to raise the end of the coupling with the linkage, and the clamp is clamped. The clamping member, the moving member, the cushioning member, the connecting member and the abutting piece of the solid structure are topped up, so that the clamping member is upwardly displaced and moved inward for clamping. The roof luggage rack locking structure according to the first, fourth or fifth aspect of the patent application, wherein the adjusting bolt of the clamping structure is fulcrum with the matching bolt, so that the two ends perform the alternating action of the upper and lower activities. At the time, it is carried out in the hole provided under the abutting piece. For example, the roof luggage rack locking structure described in claim 1, 4 or 5, wherein the upper and lower displacements of the nip piece, the connecting member, the cushioning member, the clamping member and the moving member of the clamping structure are limited. The position of the oblique hole is set in the position of the body, and the position of the inclined hole can be adjusted to be located at any position within the range of the inclined hole, thereby finely adjusting the clamping of the clamping member. For example, in the locking structure of the roof rack of the first aspect of the patent application, wherein the adjusting bolt of the adjusting structure is reversed, the bolt matched with the bolt is arranged in the arc hole of the frame body and the horizontal strip hole of the limiting body. After the internal movement, the frame body is displaced inward and upward in the displacement groove at the top of the seat body, and when the adjustment bolt is turned, the frame body is displaced outward and downward in the displacement groove at the top of the seat body.