Backrest adjusting structure and beach chair

Abstract

The utility model discloses a backrest adjusting structure and a beach chair, and aims to overcome the defect that the height of a backrest of the beach chair cannot adapt to the use of everyone. The telescopic backrest comprises an upper backrest rod and a lower backrest rod, the upper backrest rod and the lower backrest rod are connected in a sleeved mode to achieve telescopic movement, a locking mechanism is connected between the upper backrest rod and the lower backrest rod, an elastic pin is installed on the locking mechanism, and the elastic pin is connected between the upper backrest rod and the lower backrest rod to achieve locking. According to the backrest adjusting structure, the height of the backrest of the beach chair can be telescopically adjusted, the using requirements of different users are met, and the packaging size is small after the backrest of the beach chair is folded.

Description

TECHNICAL FIELD

[0001] The utility model relates to folding chair technical field, more specifically, it relates to a backrest adjusting structure and beach chair. BACKGROUND

[0002] At present, the use of beach chair is very wide, and lying on the beach chair can relax people's body and mind during leisure activities, and the beach chair is an indispensable good partner whether for family outing or friend gathering. However, the backrest of many beach chairs used at present cannot adapt to everyone, and the user with large body size has the problem of insufficient backrest height when using the beach chair, and directly increasing the height of the backrest of the beach chair will lead to the increase of the packaging size, thereby increasing the packaging and transportation cost. SUMMARY

[0003] In order to overcome the above-mentioned defects, the utility model provides a backrest adjusting structure and beach chair, the height of the backrest of the beach chair can be telescopic adjusted to meet the use requirements of different users, and the packaging volume of the beach chair is small after folding the backrest.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a backrest adjusting structure, comprising an upper backrest rod and a lower backrest rod, the upper backrest rod and the lower backrest rod are connected in a telescopic manner, a locking mechanism is connected between the upper backrest rod and the lower backrest rod, a spring pin is installed on the locking mechanism, and the spring pin is connected between the upper backrest rod and the lower backrest rod to realize locking.

[0005] When adjusting the backrest, the upper backrest rod and the lower backrest rod are moved in a telescopic manner, so that the length of the whole backrest rod is adjusted to adapt to the use requirements of different users. The upper backrest rod and the lower backrest rod are connected in a telescopic manner, and the telescopic movement is stable and reliable. After the upper backrest rod and the lower backrest rod are moved in a telescopic manner, the spring pin of the locking mechanism is inserted between the upper backrest rod and the lower backrest rod to realize locking, so as to ensure the stability of the backrest rod. When it is necessary to adjust the upper backrest rod and the lower backrest rod, the spring pin is unlocked first, then the upper backrest rod and the lower backrest rod are moved in a telescopic manner, and after being moved in place, the spring pin is bounced back to the original position to realize the locking of the upper backrest rod and the lower backrest rod.

[0006] The backrest adjusting structure of the patent application can adjust the height of the backrest of the beach chair in a telescopic manner, meet the use requirements of different users, and the packaging volume of the beach chair is small after folding the backrest.

[0007] Preferably, the locking mechanism comprises a locking seat, a pre-tightening spring is installed on the locking seat, and the spring pin is slidably installed on the locking seat.

[0008] The pre-tightening spring provides a pre-tightening force for the spring pin, the spring pin is slidably installed on the locking seat, and the movement is stable and reliable.

[0009] As preferred, the push plate is installed on the locking seat and is provided with a pushing slope, the elastic pin is provided with a guiding slope, the pushing slope and the guiding slope are arranged in close contact, and the push plate moves to push the elastic pin to move.

[0010] The push plate moves and is guided by the close contact between the pushing slope and the guiding slope, so as to push the movement of the elastic pin.

[0011] As preferred, the push plate is connected to the driving mechanism through the connecting rod, the driving mechanism comprises a driving seat, a driving plate and a driving button which are movably installed on the driving seat, the driving button and the driving plate are respectively provided with a driving slope and a driven slope which are arranged in close contact, the connecting rod is connected to the driving plate, and the driving plate is pushed to move by pressing the driving button.

[0012] The driving button is pressed to move inward, the driving plate is pushed to move through the cooperation between the driving slope and the driven slope, the connecting rod is connected between the driving plate and the push plate, and thus the push plate is pushed to move by pressing the driving button, and the elastic pin is further pushed to move.

[0013] In the second scheme, the push plate is connected to the driving mechanism through the connecting rod, the driving mechanism comprises a sliding seat, and the sliding seat is connected to the push button.

[0014] In this scheme, the push button is directly pushed to move, the sliding seat is pushed to move, the push plate is further pushed to move, and the push plate pushes the elastic pin to move.

[0015] In the third scheme, the push plate is connected to the driving mechanism through the connecting rod, the driving mechanism comprises a mounting seat, the mounting seat is rotatably connected to a driving gear, the connecting rod is provided with a rack, the driving gear is in mesh transmission with the rack, and the driving gear is connected to the knob.

[0016] In this scheme, the knob is rotated, the connecting rod is driven to move through the mesh transmission between the driving gear and the rack, the push plate is further pushed to move, and the push plate pushes the elastic pin to move.

[0017] As preferred, the driving mechanism is installed at an upper position of the upper backrest rod, the locking mechanism is installed at a lower position of the upper backrest rod, a plurality of locking holes are arranged at intervals on the upper backrest rod, and the elastic pin is inserted into the locking hole to achieve locking positioning.

[0018] The elastic pin is arranged at the lower position of the upper backrest rod, the backrest rod at the position of the elastic pin is covered by the seat cloth when the seat cloth is installed, and at this time, the elastic pin is directly pressed for operation, which is inconvenient. The driving mechanism is arranged at the upper position of the upper backrest rod and is not covered by the seat cloth, so that the operation is facilitated.

[0019] As preferred, the push plate is provided with a limiting elastic buckle, the locking seat is provided with a mounting hole, the side wall of the mounting hole is provided with a limiting slot, the lower part of the push plate is movably inserted into the mounting hole, and the limiting elastic buckle is installed in the limiting slot.

[0020] After the push plate is installed to the locking seat, the limiting elastic buckle is clamped to the limiting groove, so that the limiting elastic buckle is limited to slide in the limiting groove, and the push plate is prevented from sliding away from the locking seat.

[0021] As preferred, the locking seat is provided with an installation groove, the bottom of the installation groove is provided with a sliding groove and an insertion groove, the elastic pin is provided with a downward protruding guide strip at the bottom, the elastic pin is installed in the installation groove, the guide strip is connected with the sliding groove in a matched mode, and the lower end of the push plate is matched with the insertion groove.

[0022] During movement of the elastic pin, the guide strip slides along the sliding groove accurately and reliably, and the insertion groove provides accommodation space for the end of the push plate, so that interference is avoided.

[0023] A beach chair comprises a beach chair body, and a backrest adjusting structure is arranged on the beach chair body.

[0024] The backrest adjusting structure is arranged on the beach chair, so that the height of the backrest of the beach chair can be adjusted, and the use requirements of different users are met.

[0025] Compared with the prior art, the beach chair has the following beneficial effects: (1) the backrest adjusting structure of the beach chair can be telescopic adjusted, the use requirements of different users are met, and the packing size of the beach chair is small after the backrest is folded; and (2) the elastic pin is driven to move by the driving mechanism, the driving mechanism is not covered by the seat cloth, and the operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of embodiment 1 of the utility model.

[0027] Figure 2 is a partial sectional view of embodiment 1 of the utility model.

[0028] Figure 3 is a partial exploded view of embodiment 1 of the utility model.

[0029] Figure 4 is a structural schematic view of embodiment 2 of the utility model.

[0030] Figure 5 is a partial sectional view of embodiment 2 of the utility model.

[0031] Figure 6 is a partial exploded view of embodiment 2 of the utility model.

[0032] Figure 7 is a structural schematic view of embodiment 3 of the utility model.

[0033] Figure 8 is a partial sectional view of embodiment 3 of the utility model.

[0034] Figure 9is a partial exploded view of the embodiment 3 of the utility model.

[0035] In the figure: 1, upper backrest rod, 2, lower backrest rod, 3, locking mechanism, 4, spring pin, 5, locking hole, 6, locking seat, 7, fastening hole, 8, pre-tightening spring, 9, push plate, 10, push inclined plane, 11, guide inclined plane, 12, installation slot, 13, sliding slot, 14, insertion slot, 15, guide strip, 16, limit elastic buckle, 17, limit slot, 18, driving mechanism, 19, driving seat, 20, driving plate, 21, driving button, 22, driving inclined plane, 23, driven inclined plane, 24, abutment seat, 25, connecting slot, 26, containing slot, 27, guide slot, 28, positioning slot, 29, positioning elastic buckle, 30, guide strip, 31, limit sleeve, 32, flange, 33, limit sheet, 34, support rod, 35, sliding seat, 36, push button, 37, connecting column, 38, mounting seat, 39, driving gear, 40, rack, 41, knob, 42, connecting rod. DETAILED DESCRIPTION

[0036] The technical scheme of the utility model will be further specifically described below by specific embodiments and in conjunction with the drawings:

[0037] Embodiment 1: a backrest adjusting structure (see Figure 1 、 Figure 2 、 Figure 3 ), including upper backrest rod 1 and lower backrest rod 2, upper backrest rod 1 and lower backrest rod 2 are connected in a sleeve and realize telescopic movement, in the embodiment, upper backrest rod 1 is sleeved in lower backrest rod 2 at the lower part, locking mechanism 3 is connected between upper backrest rod 1 and lower backrest rod 2, locking mechanism 3 is arranged at the lower end of upper backrest rod 1, spring pin 4 is installed on locking mechanism 3, and spring pin 4 is connected between upper backrest rod 1 and lower backrest rod 2 to realize locking.

[0038] Locking mechanism 3 includes locking seat 6, locking seat 6 is provided with fastening hole 7, fastening pin is connected between upper backrest rod 1 and fastening hole 7, so that locking seat 6 is in fixed position with upper backrest rod 1. Pre-tightening spring 8 is installed on locking seat 6, spring pin 4 is slidably installed on locking seat 6, and pre-tightening spring 8 abuts on spring pin 4. Push plate 9 movably arranged on locking seat 6, spring pin 4 moves radially, push inclined plane 10 is arranged on push plate 9, guide inclined plane 11 is arranged on spring pin 4, push inclined plane 10 and guide inclined plane 11 are arranged in abutment, and push plate 9 moves to push spring pin 4 to move.

[0039] The locking seat 6 is provided with a mounting groove 12, the bottom of the mounting groove 12 is provided with a sliding groove 13 and a plug groove 14, the bottom of the plug groove 14 is provided with a downward protruding guide strip 15, the plug pin 4 is installed in the mounting groove 12, the guide strip 15 is connected with the sliding groove 13, the guide strip 15 slides along the sliding groove 13 in the moving process of the plug pin 4, and the lower end of the push plate 9 is matched with the plug groove 14. The push plate 9 is provided with two blocks, the upper ends of the two push plates 9 are connected together to form an inverted U-shaped structure, the push inclined surface 10 is arranged at the lower end of the push plate 9, the bottom of the mounting groove 12 is provided with two plug grooves 14, the two plug grooves 14 are respectively arranged on the two sides of the sliding groove 13, and the two plug grooves 14 are correspondingly arranged with the two push plates 9. The plug pin 4 is provided with a guide inclined surface 11 on both sides, and the two guide inclined surfaces 11 are respectively close to the push inclined surface 10 on the two push plates 9. One end of the mounting groove 12 is open, the other end of the mounting groove 12 is closed, one end of the plug pin 4 is a locking end, the locking end is exposed from the opening end of the mounting groove 12 and is inserted together with the locking hole 5, one end of the pre-tightening spring 8 abuts against the plug pin 4, and the other end of the pre-tightening spring 8 abuts against the closed end of the mounting groove 12.

[0040] The push plate 9 is provided with a limiting elastic buckle 16, the locking seat 6 is provided with a mounting hole, the side wall of the mounting hole is provided with a limiting groove 17, the lower part of the push plate 9 is movably inserted into the mounting hole, and the limiting elastic buckle 16 is installed in the limiting groove 17. The limiting elastic buckle 16 is provided with a protruding point, the protruding point is clamped in the limiting groove 17, so that the protruding point can slide along the limiting groove 17 and is not easy to slide out of the limiting groove 17, thereby limiting the push plate 9.

[0041] The push plate 9 is connected with the driving mechanism 18 through a connecting rod 42, and the driving mechanism 18 is installed at the upper position of the upper backrest rod 1. The plug pin 4 is arranged at the lower position of the upper backrest rod 1, and when the seat cloth is installed, the backrest rod at the position of the plug pin 4 will be covered by the seat cloth, at this time, it is inconvenient to directly press the plug pin 4. The driving mechanism 18 is arranged at the upper position of the upper backrest rod 1 and will not be covered by the seat cloth, so that the operation is convenient. The driving mechanism is installed in the hollow upper backrest rod 1, the driving mechanism 18 comprises a driving seat 19, a driving plate 20 and a driving button 21 movably installed on the driving seat 19, a driving inclined surface 22 and a driven inclined surface 23 are respectively arranged on the driving button 21 and the driving plate 20, the end of the driving button 21 extends out of the outer wall of the upper backrest rod 1, the driving seat 19 and the upper backrest rod 1 are tightly connected through screws, the driving inclined surface 22 and the driven inclined surface 23 are close to each other, the connecting rod 42 is connected with the driving plate 20, the driving plate 20 is pushed to move by pressing the driving button 21. The connecting rod 42 is provided with an abutting seat 24 at the upper and lower ends, and the upper and lower abutting seats 24 are respectively arranged in abutment with the driving plate 20 and the push plate 9.

[0042] The driving seat 19 is provided with a connecting groove 25, the top surface of the connecting groove 25 is provided with a containing groove 26 and a guide groove 27, the driving seat 19 is provided with an inserting groove, the inserting groove is communicated with the connecting groove 25, the driving plate 20 is provided with two pieces, the lower ends of the two driving plates 20 are connected together to form a U-shaped structure, the upper ends of the two driving plates 20 are provided with driven inclined surfaces 23, the driving button 21 is provided with two driving inclined surfaces 22, the two driving inclined surfaces 22 are respectively close to the two driven inclined surfaces 23. The side wall of the inserting groove is provided with a positioning groove 28, the driving plate 20 is provided with a positioning elastic buckle 29, the positioning elastic buckle 29 is movably inserted into the positioning groove 28, the positioning elastic buckle 29 is provided with a convex point, the convex point slides along the positioning groove 28 without being separated from the positioning groove 28, so that the driving plate 20 is limited. The two sides of the guide groove 27 are provided with containing grooves 26, the upper ends of the two driving plates 20 correspond to the two containing grooves 26 respectively, the upper part of the driving button 21 is provided with a convex guide strip 30, the guide strip 30 is adaptively and insertably connected with the guide groove 27.

[0043] The driving button 21 is pressed, the driving button 21 moves inward, and the driving plate 20 is pushed to move through the cooperation of the driving inclined surface 22 and the driven inclined surface 23, the connecting rod 42 is connected between the driving plate 20 and the push plate 9, therefore the push plate 9 can be pushed to move by pressing the driving button 21, and then the elastic pin 4 is pushed to move.

[0044] A beach chair comprises a beach chair body, and a backrest adjusting structure is arranged on the beach chair body. The lower backrest rod 2 is connected with a limiting sleeve 31 at the upper end, and a flange 32 is arranged on the upper edge of the limiting sleeve 31. Two limiting sheets 33 are arranged on the outer wall of the upper backrest rod 1, and a plug is arranged on the limiting sheet 33. The outer wall of the upper backrest rod 1 is provided with a plug hole, and the plug and the plug hole are insertably connected. The flange 32 limits the limiting sheet 33, so as to prevent the upper backrest rod 1 and the lower backrest rod 2 from being separated from each other. The upper backrest rod 1 is connected with a U-shaped supporting rod 34, which plays a supporting role.

[0045] When the backrest adjusting operation is performed, the upper backrest rod 1 and the lower backrest rod 2 are moved to be extended and retracted to each other, so as to adjust the length of the whole backrest rod, so as to adapt to the use requirements of different users. The upper backrest rod 1 and the lower backrest rod 2 are connected in a sleeved manner and are stably and reliably moved to be extended and retracted. After the upper backrest rod 1 and the lower backrest rod 2 are moved to be extended and retracted to be in place, the elastic pin 4 of the locking mechanism 3 is insertably connected between the upper backrest rod 1 and the lower backrest rod 2, so as to be locked, and the stability of the backrest rod is ensured. When the upper backrest rod 1 and the lower backrest rod 2 need to be adjusted, the elastic pin 4 is unlocked by the driving mechanism 18, and then the upper backrest rod 1 and the lower backrest rod 2 are moved to be extended and retracted. After being moved to be in place, the elastic pin 4 is returned to the original position, so as to lock the upper backrest rod 1 and the lower backrest rod 2.

[0046] Embodiment 2: a backrest adjusting structure (see Figure 4 、 Figure 5 、 Figure 6), including the upper backrest rod 1 and the lower backrest rod 2, the upper backrest rod 1 and the lower backrest rod 2 are connected to realize telescopic movement, the upper backrest rod 1 is sleeved in the lower backrest rod 2 in the embodiment, a locking mechanism 3 is connected between the upper backrest rod 1 and the lower backrest rod 2, the locking mechanism 3 is arranged at the lower end position of the upper backrest rod 1, a spring pin 4 is arranged on the locking mechanism 3, and the spring pin 4 is connected between the upper backrest rod 1 and the lower backrest rod 2 to realize locking. The locking mechanism 3 is arranged at the lower position of the upper backrest rod 1, a plurality of locking holes 5 are arranged on the upper backrest rod 2 in an upper-lower interval, and the spring pin 4 is inserted and arranged in the locking hole 5 to realize locking positioning.

[0047] The locking mechanism 3 comprises a locking seat 6, a fastening hole 7 is arranged on the locking seat 6, a fastening pin is connected between the upper backrest rod 1 and the fastening hole 7, so that the locking seat 6 is positioned and fixed with the upper backrest rod 1. A pre-tightening spring 8 is arranged on the locking seat 6, the spring pin 4 is slidingly arranged on the locking seat 6, and the pre-tightening spring 8 abuts against the spring pin 4. A push plate 9 movably arranged on the locking seat 6, the push plate 9 moves axially, the spring pin 4 moves radially, a push inclined surface 10 is arranged on the push plate 9, a guide inclined surface 11 is arranged on the spring pin 4, the push inclined surface 10 and the guide inclined surface 11 are arranged in abutment, and the push plate 9 moves to push the spring pin 4 to move.

[0048] An installation groove 12 is arranged on the locking seat 6, a sliding groove 13 and a plug groove 14 are arranged at the bottom of the installation groove 12, a guide strip 15 protruding downward is arranged at the bottom of the spring pin 4, the spring pin 4 is arranged in the installation groove 12, the guide strip 15 is connected with the sliding groove 13 in a matched mode, the guide strip 15 slides along the sliding groove 13 in the movement process of the spring pin 4, and the lower end of the push plate 9 is matched with the plug groove 14. The push plate 9 is provided with two plates, the upper ends of the two push plates 9 are connected together to form an inverted U-shaped structure, the push inclined surface 10 is arranged at the lower end of the push plate 9, the bottom of the installation groove 12 is provided with two plug grooves 14, the two plug grooves 14 are respectively arranged on the two sides of the sliding groove 13, and the two plug grooves 14 are arranged in correspondence with the two push plates 9. The spring pin 4 is provided with the guide inclined surface 11 on both sides, and the two guide inclined surfaces 11 are respectively in abutment with the push inclined surface 10 on the two push plates 9. One end of the installation groove 12 is open, the other end of the installation groove 12 is closed, one end of the spring pin 4 is a locking end, the locking end is exposed from the open end of the installation groove 12 and is inserted together with the locking hole 5, one end of the pre-tightening spring 8 abuts against the spring pin 4, and the other end of the pre-tightening spring 8 abuts against the closed end of the installation groove 12.

[0049] A limiting spring buckle 16 is arranged on the push plate 9, an installation hole is arranged on the locking seat 6, a limiting groove 17 is arranged on the side wall of the installation hole, the push plate 9 is movably inserted in the installation hole, and the limiting spring buckle 16 is arranged in the limiting groove 17. A protruding point is arranged on the limiting spring buckle 16, the protruding point is clamped in the limiting groove 17, so that the protruding point can slide along the limiting groove 17 and is not easy to slide out of the limiting groove 17, thereby limiting the push plate 9.

[0050] The push plate 9 is connected with the driving mechanism 18 through the connecting rod 42, and the driving mechanism 18 is installed at the upper position of the upper backrest rod 1. The elastic pin 4 is arranged at the lower position of the upper backrest rod 1, and the position of the backrest rod is covered by the seat cloth when the seat cloth is installed. At this time, it is inconvenient to directly press the elastic pin 4. The driving mechanism 18 is arranged at the upper position of the upper backrest rod 1 and is not covered by the seat cloth, so that the operation is facilitated. The driving mechanism is installed in the hollow upper backrest rod 1, and the driving mechanism 18 comprises a sliding seat 35 connected with a push button 36. The upper and lower ends of the connecting rod 42 are connected with abutting seats 24, and the upper and lower abutting seats 24 are arranged in abutment with the sliding seat 35 and the push plate 9, respectively. The sliding seat 35 and the push button 36 are connected through a connecting column 37, the outer wall of the push button 36 is provided with anti-skid lines, the side wall of the upper backrest rod 1 is provided with an avoiding slot, the connecting column 37 passes through the avoiding slot, and the connecting column 37 slides along the avoiding slot in the pushing process of the push button 36. In the scheme, the push button 36 is directly pushed to move, the sliding seat 35 is driven to move, and then the push plate 9 is driven to move, and the push plate 9 drives the elastic pin 4 to move.

[0051] A beach chair comprises a beach chair body, and a backrest adjusting structure is arranged on the beach chair body. The lower backrest rod 2 is connected with a limiting sleeve 31 at the upper end, the limiting sleeve 31 is provided with a flange 32 at the upper edge, the outer wall of the upper backrest rod 1 is connected with two limiting sheets 33, the limiting sheets 33 are provided with pins, the outer wall of the upper backrest rod 1 is provided with a hole, the pin and the hole are connected through insertion, the flange 32 limits the limiting sheets 33, and the upper backrest rod 1 and the lower backrest rod 2 are prevented from being separated from each other. The upper backrest rod 1 is connected with a U-shaped supporting rod 34, and the supporting rod 34 plays a supporting role.

[0052] When the backrest adjusting operation is performed, the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction relative to each other, so that the length of the whole backrest rod is adjusted to adapt to the use requirements of different users. The upper backrest rod 1 and the lower backrest rod 2 are connected in a sleeved manner and are stably and reliably moved in extension and retraction. After the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction to a position, the elastic pin 4 of the locking mechanism 3 is inserted between the upper backrest rod 1 and the lower backrest rod 2 to realize locking, so that the stability of the backrest rod is ensured. When the upper backrest rod 1 and the lower backrest rod 2 need to be adjusted, the elastic pin 4 is first unlocked through the driving mechanism 18, then the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction, and after being moved to a position, the elastic pin 4 is returned to the original position to realize the locking of the upper backrest rod 1 and the lower backrest rod 2.

[0053] Embodiment 3: a backrest adjusting structure (see Figure 7 、 Figure 8 、 Figure 9), including the upper backrest rod 1 and the lower backrest rod 2, the upper backrest rod 1 and the lower backrest rod 2 are connected to realize telescopic movement, the upper backrest rod 1 is sleeved in the lower backrest rod 2 in the embodiment, a locking mechanism 3 is connected between the upper backrest rod 1 and the lower backrest rod 2, the locking mechanism 3 is arranged at the lower end position of the upper backrest rod 1, a spring pin 4 is arranged on the locking mechanism 3, and the spring pin 4 is connected between the upper backrest rod 1 and the lower backrest rod 2 to realize locking. The locking mechanism 3 is arranged at the lower position of the upper backrest rod 1, a plurality of locking holes 5 are arranged on the upper backrest rod 2 in an upper-lower interval, and the spring pin 4 is inserted and arranged in the locking hole 5 to realize locking positioning.

[0054] The locking mechanism 3 comprises a locking seat 6, a fastening hole 7 is arranged on the locking seat 6, a fastening pin is connected between the upper backrest rod 1 and the fastening hole 7, so that the locking seat 6 is positioned and fixed with the upper backrest rod 1. A pre-tightening spring 8 is arranged on the locking seat 6, the spring pin 4 is slidingly arranged on the locking seat 6, and the pre-tightening spring 8 abuts against the spring pin 4. A push plate 9 movably arranged on the locking seat 6, the push plate 9 moves axially, the spring pin 4 moves radially, a push inclined surface 10 is arranged on the push plate 9, a guide inclined surface 11 is arranged on the spring pin 4, the push inclined surface 10 and the guide inclined surface 11 are arranged in abutment, and the push plate 9 moves to push the spring pin 4 to move.

[0055] An installation groove 12 is arranged on the locking seat 6, a sliding groove 13 and a plug groove 14 are arranged at the bottom of the installation groove 12, a guide strip 15 protruding downward is arranged at the bottom of the spring pin 4, the spring pin 4 is arranged in the installation groove 12, the guide strip 15 is connected with the sliding groove 13 in a matched mode, the guide strip 15 slides along the sliding groove 13 in the movement process of the spring pin 4, and the lower end of the push plate 9 is matched with the plug groove 14. The push plate 9 is provided with two plates, the upper ends of the two push plates 9 are connected together to form an inverted U-shaped structure, the push inclined surface 10 is arranged at the lower end of the push plate 9, the bottom of the installation groove 12 is provided with two plug grooves 14, the two plug grooves 14 are respectively arranged on the two sides of the sliding groove 13, and the two plug grooves 14 are arranged in correspondence with the two push plates 9. The spring pin 4 is provided with the guide inclined surface 11 on both sides, and the two guide inclined surfaces 11 are respectively in abutment with the push inclined surface 10 on the two push plates 9. One end of the installation groove 12 is open, the other end of the installation groove 12 is closed, one end of the spring pin 4 is a locking end, the locking end is exposed from the open end of the installation groove 12 and is inserted together with the locking hole 5, one end of the pre-tightening spring 8 abuts against the spring pin 4, and the other end of the pre-tightening spring 8 abuts against the closed end of the installation groove 12.

[0056] A limiting spring buckle 16 is arranged on the push plate 9, an installation hole is arranged on the locking seat 6, a limiting groove 17 is arranged on the side wall of the installation hole, the push plate 9 is movably inserted in the installation hole, and the limiting spring buckle 16 is arranged in the limiting groove 17. A protruding point is arranged on the limiting spring buckle 16, the protruding point is clamped in the limiting groove 17, so that the protruding point can slide along the limiting groove 17 and is not easy to slide out of the limiting groove 17, thereby limiting the push plate 9.

[0057] The push plate 9 is connected with the driving mechanism 18 through the connecting rod 42, and the driving mechanism 18 is arranged at the upper position of the upper backrest rod 1. The elastic pin 4 is arranged at the lower position of the upper backrest rod 1, and the backrest rod at the position of the elastic pin 4 is covered by the seat cloth when the seat cloth is installed, so that the operation of directly pressing the elastic pin 4 is inconvenient. The driving mechanism 18 is arranged at the upper position of the upper backrest rod 1 and is not covered by the seat cloth, so that the operation is convenient. The driving mechanism is arranged in the hollow upper backrest rod 1, and the driving mechanism 18 comprises a mounting seat 38, the mounting seat 38 is rotationally connected with a driving gear 39, the connecting rod 42 is provided with a rack 40, the driving gear 39 is in meshing transmission with the rack 40, the driving gear 39 is connected with a knob 41, and the knob 41 is arranged outside the upper backrest rod 1. The connecting rod 42 is connected with an abutting seat 24 at the lower end, and the abutting seat 24 and the push plate 9 are arranged in abutment. In the scheme, the knob 41 is rotated, the driving gear 39 is in meshing transmission with the rack 40, the connecting rod 42 is driven to move, and then the push plate 9 is driven to move, so that the push plate 9 drives the elastic pin 4 to move.

[0058] The beach chair comprises a beach chair body, and backrest adjusting structure is arranged on the beach chair body. The lower backrest rod 2 is connected with a limiting sleeve 31 at the upper end, the limiting sleeve 31 is provided with a flange 32 at the upper edge, two limiting sheets 33 are connected with the outer wall of the upper backrest rod 1, the limiting sheets 33 are provided with a plug pin, the outer wall of the upper backrest rod 1 is provided with a plug hole, the plug pin and the plug hole are in plug connection, the flange 32 limits the limiting sheets 33, and the upper backrest rod 1 and the lower backrest rod 2 are prevented from being separated from each other. The upper backrest rod 1 is connected with a U-shaped supporting rod 34, and the supporting rod 34 plays a supporting role.

[0059] When the backrest adjusting operation is performed, the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction relative to each other, so that the length of the whole backrest rod is adjusted, so as to adapt to the use requirements of different users. The upper backrest rod 1 and the lower backrest rod 2 are connected in sleeve and are stably and reliably moved in extension and retraction. After the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction to the position, the plug pin of the locking mechanism 3 is plugged between the upper backrest rod 1 and the lower backrest rod 2 to realize locking, so as to ensure the stability of the backrest rod. When the upper backrest rod 1 and the lower backrest rod 2 need to be adjusted, the plug pin 4 is unlocked through the driving mechanism 18, then the upper backrest rod 1 and the lower backrest rod 2 are moved in extension and retraction, the plug pin 4 is returned to the position after the movement to the position, and the locking of the upper backrest rod 1 and the lower backrest rod 2 is realized.

[0060] The above-described embodiments are only the preferred schemes of the present application and do not limit the present application in any form, and other variants and modifications can be made without departing from the technical schemes recorded in the claims.

Claims

1. A backrest adjustment structure, characterized in that, The backrest adjusting structure comprises an upper backrest rod and a lower backrest rod, the upper backrest rod and the lower backrest rod are connected to realize telescopic movement, a locking mechanism is connected between the upper backrest rod and the lower backrest rod, a spring pin is installed on the locking mechanism, and the spring pin is connected between the upper backrest rod and the lower backrest rod to realize locking.

2. The backrest adjustment structure according to claim 1, wherein The locking mechanism comprises a locking seat, a pre-tightening spring is installed on the locking seat, and the spring pin is slidably installed on the locking seat and abuts against the pre-tightening spring.

3. The backrest adjustment structure according to claim 2, wherein A push plate movably installed on the locking seat is installed on the locking seat, a push inclined surface is arranged on the push plate, a guide inclined surface is arranged on the spring pin, the push inclined surface and the guide inclined surface are arranged in abutment, and the push plate is moved to move the spring pin.

4. The backrest adjustment structure according to claim 3, wherein The push plate is connected to a driving mechanism through a connecting rod, the driving mechanism comprises a driving seat, a driving plate and a driving button movably installed on the driving seat, a driving inclined surface and a driven inclined surface are respectively arranged on the driving button and the driving plate, the driving inclined surface and the driven inclined surface are arranged in abutment, the connecting rod is connected to the driving plate, and the driving plate is moved by pressing the driving button.

5. The backrest adjustment structure according to claim 3, wherein The push plate is connected to a driving mechanism through a connecting rod, the driving mechanism comprises a sliding seat, and the sliding seat is connected to a push button.

6. The backrest adjustment structure according to claim 3, wherein The push plate is connected to a driving mechanism through a connecting rod, the driving mechanism comprises a mounting seat, a driving gear is rotatably connected to the mounting seat, a rack is arranged on the connecting rod, the driving gear is in mesh transmission with the rack, and the driving gear is connected to a knob.

7. A backrest adjustment structure according to claim 4 or 5 or 6, characterised in that, The driving mechanism is installed at an upper position of the upper backrest rod, the locking mechanism is installed at a lower position of the upper backrest rod, a plurality of locking holes are arranged at intervals on the lower backrest rod, the spring pin is inserted into and locked in the locking hole.

8. The backrest adjustment structure according to claim 3 or 4 or 5 or 6, characterized in that, A limiting spring buckle is arranged on the push plate, an installation hole is arranged on the locking seat, a limiting groove is arranged on a side wall of the installation hole, the push plate is movably inserted into the installation hole, and the limiting spring buckle is installed in the limiting groove.

9. The backrest adjustment structure according to claim 3 or 4 or 5 or 6, characterized in that, A mounting groove is arranged on the locking seat, a sliding groove and a plug groove are arranged at a bottom of the mounting groove, a downward protruding guide strip is arranged at a bottom of the spring pin, the spring pin is installed in the mounting groove, the guide strip is connected to the sliding groove in a matched manner, and a lower end of the push plate is matched with the plug groove.

10. A beach chair characterized by, The beach chair body is provided with the backrest adjusting structure according to any one of claims 1 to 9.

Images