CN217906977U - Rotatable folding chair armrest - Google Patents

Abstract

The utility model discloses a rotatable folding chair armrest, a concave cavity with an open cavity opening is arranged on the armrest mounting seat of the product; the rotary lock catch piece is movably and transversely hung at the left lower part in the concave cavity, and lock catch grooves are formed in the upper end and the lower end of the rotary lock catch piece; the root part of the armrest handle is connected with a follow-up rotation adjusting plate, is provided with a lock catch rotation adjusting gap, is movably and transversely hung in the middle of the concave cavity, extends a buckle piece in the middle of the lock catch rotation adjusting gap, and extends a convex lock catch pushing piece from the side wall below the left side to the gap direction; the lock catch pushing piece, the buckle piece and the lock catch groove are matched to unlock and lock; the product can be unlocked and locked by manually pulling the armrest handle to rotate, and is folded downwards for storage after being unlocked, a special switch piece is not needed, manual locking is avoided, the complexity of the structure of the lock device is reduced, the operation is convenient, the use is convenient, the application range is wide, and the lock device is particularly suitable for people of the old, the weak, the sick, the disabled and the young; meanwhile, the production cost is reduced.

Description

Rotatable folding chair armrest

Technical Field

The utility model relates to a domestic chair part especially relates to a rotatable folding chair handrail.

Background

For example, 1: publication number published by the national intellectual property office: CN207928091U, which discloses a foldable handrail, comprising a fixed base 1, a folding mechanism and a handrail body 3; the folding mechanism comprises a connecting rod assembly and a locking assembly for realizing locking control on the connecting rod assembly; the link assembly includes a first link 21 and a second link 22; the first connecting rod 21 and the second connecting rod 22 both comprise two ends, which are marked as a first end and a second end; the first end of the first connecting rod 21 and the first end of the second connecting rod 22 are both pivoted with the fixed base 1, and the second end of the first connecting rod 21 and the second end of the second connecting rod 22 are both pivoted with the armrest body 3; the locking assembly is arranged at the pivoting position of the second connecting rod 22 and the fixed base 1; the locking assembly comprises a ratchet wheel 23 and a blocking element 24 which can be engaged with and disengaged from the ratchet wheel 23; the ratchet wheel 23 is fixed on the fixed base 1, and the blocking element 24 is arranged on the second connecting rod 22; when the blocking element 24 is engaged with the ratchet wheel 23, the second connecting rod 22 is static relative to the fixed base 1; when the locking assembly is in a locking state, the connecting rod assembly is static relative to the fixed base 1; when the locking assembly is in an unlocking state, the connecting rod assembly and the fixed base 1 and the connecting rod assembly and the handrail body 3 can rotate relatively, so that the handrail body 3 is folded downwards;

the locking assembly also comprises a switch element 25 for controlling the engagement and disengagement of the position control element 24 and the ratchet wheel 23, and the switch element 25 is arranged on the armrest body 3; when the switch member 25 is opened, the detent member 24 is disengaged from the ratchet wheel 23. Preferably, the switch member 25 controls the engagement state of the position control member 24 and the ratchet wheel 23 through a cable 27, the cable 27 being disposed inside the second link 22; when the blocking element 24 is separated from the ratchet wheel 23, the second connecting rod 22 and the first connecting rod 21 both rotate downwards around the fixed base 1, and the handrail body 3 is driven to move downwards and realize folding in the process of downward rotation of the connecting rod assembly; the folding of the armrest body 3 is realized through the mutual matching of the ratchet wheel 23 and the blocking element 24;

the locking assembly further comprises a return spring 26, one end of the return spring 26 is fixed on the second connecting rod 22, and the other end of the return spring 26 is fixed on the position-limiting element 24; the return spring 26 always applies elastic force to the clamping element 24 to move towards the ratchet wheel 3; when the armrest body 3 moves upward from the folded state, the return spring 26 can drive the detent element 24 to move, so that the detent element 24 engages with the ratchet wheel 23.

The folding parts of the chair armrest are many, the structure is complex, the production cost is high, the switch piece 25 is required to be manually operated, the inhaul cable 27 is pulled to open the clamping element 24 to be separated from the ratchet wheel 23, then the armrest body 3 is rotated, and the chair armrest can be folded, so that the chair armrest is inconvenient for old, weak, sick, disabled and young children.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a structural design is reasonable, and the part is few, and it is rotatory through pulling armrest handle, makes to cooperate automatic unblock and the automatic rotatable folding chair handrail of locking between hasp impeller, buckle spare, the hasp groove three.

The scheme for solving the technical problems is as follows:

a rotatable folding chair armrest belongs to chair components, and comprises an armrest mounting seat, an armrest handle and a rotary locking piece;

the top and the front part of the handrail mounting seat are provided with a concave cavity with an open cavity opening inwards from the peripheral side wall, a rear limiting wall is formed at the rear cavity opening of the open cavity opening, and a lower limiting wall is formed at the front lower cavity opening; the rotary lock catch piece is movably transversely hung and connected at the lower left part in the cavity by taking the middle as the center, and lock catch grooves are formed in the upper end and the lower end of the rotary lock catch piece;

the root of the armrest handle is connected with a follow-up rotation adjusting plate, lock catch rotation adjusting notches are formed in the left side of the periphery of the follow-up rotation adjusting plate and below the left side of the periphery of the follow-up rotation adjusting plate, and the lock catch rotation adjusting notches provide space for a rotation lock catch piece in the rotation process;

the follow-up rotation adjusting plate is movably transversely hung and connected in the middle of the cavity by taking the middle as a center, and the armrest handle can only be rotatably adjusted in the cavity opening range between the rear limiting wall and the lower limiting wall;

a convex fastener extends from the side wall of the follow-up rotation adjusting plate positioned in the middle of the lock catch rotation adjusting notch;

a convex lock catch pushing piece extends from the side wall below the left side of the follow-up rotation adjusting plate to the direction of the notch, and the lock catch pushing piece is used for pushing the rotation lock catch piece to rotate, unlock and lock;

the lock catch pushing piece, the buckle piece and the lock catch groove are matched for unlocking and locking, after the lock catch pushing piece pushes the rotary lock catch piece to rotate vertically, the buckle piece is in a locking and locking state when falling into the lock catch groove, and the handrail handle is unfolded and transversely arranged and fixed; on the contrary, after the lock catch pushing piece pushes the rotary lock catch piece to rotate and is not vertical, the lock catch piece is in an unlocking state when being separated from the lock catch groove, and the handrail handle can rotate and fold downwards.

The utility model discloses a rotatable folding chair handrail beneficial effect does: the handrail installation seat is characterized in that a cavity with an open cavity opening is formed in the peripheral side wall of the handrail installation seat inwards, a follow-up rotation adjusting plate and a rotation locking piece are movably installed in the cavity, a locking rotation adjusting notch is formed in the follow-up rotation adjusting plate, a buckling piece and a locking piece pushing piece extend from the locking rotation adjusting notch, locking grooves are formed in the upper end and the lower end of the rotation locking piece, the locking piece pushing piece, the buckling piece and the locking grooves are matched for unlocking and locking, after the locking piece pushing piece pushes the rotation locking piece to rotate vertically, the buckling piece falls into the locking grooves and is in a locking state, and a handrail handle is unfolded and transversely arranged and fixed; on the contrary, after the lock catch pushing piece pushes the rotary lock catch piece to rotate and is not vertical, the buckle piece is in an unlocking state when being separated from the lock catch groove, and the handrail handle can be rotated and folded downwards; the product can be unlocked and locked by manually pulling the armrest handle to rotate, and is folded downwards for storage after being unlocked, a special switch piece is not needed, manual locking is avoided, the complexity of the structure of the lock device is reduced, the operation is convenient, the use is convenient, the application range is wide, and the lock device is particularly suitable for people who are old, weak, sick, disabled and young; meanwhile, the production cost is reduced.

Drawings

Fig. 1 and fig. 2 are perspective views of the product of the present invention;

fig. 3 is a front view of the armrest handle of the utility model in a normal use state in a horizontal unfolded state;

fig. 4 is a cross sectional view of the handle of the utility model in a horizontal state, wherein the locking member, the rotary locking member and the locking groove are locked and supported by a follow-up rotary adjusting plate to be fixed, and the locking member, the rotary locking member and the locking groove are locked and locked;

FIG. 5 is a perspective view of the product of the present invention in a locked state with the following rotary adjustment plate, the locking member, the rotary locking member and the locking groove;

FIG. 6 is a perspective view showing the state of the product of the present invention in which the locking member and the rotation locking member are separated;

fig. 7 and 8 are perspective views of the handrail mounting base of the product of the present invention;

fig. 9 is a front view of the handle of the handrail of the utility model in a horizontal state, wherein the locking member, the rotary locking member and the locking groove are locked and supported by a follow-up rotary adjusting plate for fixation, and the locking member, the rotary locking member and the locking groove are in a locking and locking state;

fig. 10 is a schematic view of the state that the armrest handle of the utility model is turned over after being lifted, the buckle piece is separated from the locking groove after the follow-up rotation adjusting plate and the armrest handle rotate anticlockwise, and the locking pushing piece contacts the bottom of the rotating locking piece to push the rotating locking piece to turn over and topple over;

fig. 11 is a schematic view of the state that the armrest handle of the utility model is turned over after being lifted, the buckle piece is separated from the locking groove after the follow-up rotation adjusting plate and the armrest handle rotate anticlockwise, and the locking pushing piece pushes the rotary locking piece to turn over and topple over;

fig. 12 is a schematic view showing a state of the rotary latch of the present invention in a clockwise rotation folding process of pressing the armrest handle, the follower rotation adjusting plate, and the armrest handle after being overturned;

fig. 13 is a schematic view of the armrest handle of the utility model after being rotated clockwise and completely folded;

fig. 14 is a schematic view of the product of the present invention in a state where the handle is completely folded and then lifted up, the follower rotation adjusting plate and the handle rotate counterclockwise, and the latch pushing member pushes the bottom end of the rotary latch member to rotate and the rotary latch member is made to be vertical;

FIG. 15 is a schematic view showing a state in which the armrest handle is pressed down, the adjustment plate is rotated in a follow-up manner, the armrest handle is rotated clockwise, and the latch member falls into the locking groove to be locked;

fig. 16 is a schematic view showing the locked state after the catch has been dropped into the catch groove, and the armrest handle is deployed and fixed in the lateral disposition.

The handrail installation seat 1, a cavity 11, an open cavity 1101, a shaft penetrating hole 12, a screw 13, a nail penetrating hole 14, a lock nail 15, a lower limit wall 16, a lower limit wall 17, an installation connecting piece 1A, a circular bulge 1B, a rotary lock catch piece 2, a lock catch groove 21, a penetrating hole 22, a follow-up rotary adjusting plate 3, a lock catch rotary adjusting notch 31, a buckle piece 32, a lock catch pushing piece 33, a protection piece 34, a left upper lock catch hiding space 35, a left lower lock catch hiding space 36, a plate penetrating hole 37, a handle joint 38, a hollow hole 39 and a handrail handle 4.

Detailed Description

A rotatable folding chair armrest belongs to chair components, is mainly used on wheelchair products, and comprises an armrest mounting seat 1, an armrest handle 4 and a rotary lock catch 2;

the top and the front part of the handrail installation seat 1 are internally provided with a cavity 11 with an open cavity 1101 from the peripheral side wall, a lower limiting wall 16 is formed at the rear cavity of the open cavity 1101, a lower limiting wall 17 is formed at the front lower cavity, the rotary locking piece 2 is movably and transversely hung and connected to the left lower part in the cavity 11 by taking the middle as the center, and the upper end and the lower end of the rotary locking piece 2 are both provided with locking grooves 21;

the root of the armrest handle 4 is connected with a follow-up rotation adjusting plate 3, lock catch rotation adjusting notches 31 are formed in the left side of the periphery of the follow-up rotation adjusting plate 3 and below the left side of the periphery of the follow-up rotation adjusting plate 3, and the lock catch rotation adjusting notches 31 provide space for the rotation locking fastener 2 in the rotation process;

the follow-up rotation adjusting plate 3 is movably hung and connected in the middle of the cavity 11 by taking the middle as a center, and the handrail handle 4 can only rotate and adjust in the cavity opening range between the lower limiting wall 16 and the lower limiting wall 17;

a convex fastener 32 extends from the side wall of the follow-up rotation adjusting plate 3 in the middle of the lock catch rotation adjusting notch 31;

a convex lock catch pushing piece 33 extends from the lower side wall of the left side of the follow-up rotation adjusting plate 3 to the direction of the notch, and the lock catch pushing piece 33 is used for pushing the rotation lock catch piece 2 to rotate, unlock and lock;

the lock catch pushing piece 33, the buckle piece 32 and the lock catch groove 21 are matched to unlock and lock, after the lock catch pushing piece 33 pushes the rotary lock catch piece 2 to rotate vertically, the buckle piece 32 is in a locking and locking state when falling into the lock catch groove 21, and the handrail handle 4 is unfolded and transversely arranged and fixed; conversely, when the latch pushing member 33 pushes the rotary latch 2 to rotate non-vertically, the latch 32 is unlocked when it is separated from the latch slot 21, and the handle 4 can be folded down.

The above structure is a basic structure that the armrest handle 4 can be unfolded for normal use and folded for storage.

The technical scheme is further as follows: the concave cavity 11 is flat, the inner cavity of the concave cavity is circular, and the diameter of the concave cavity 11 is slightly larger than that of the follow-up rotation adjusting plate 3; the follow-up rotation adjusting plate 3 is flat, the periphery of the follow-up rotation adjusting plate is circular, the thickness of the follow-up rotation adjusting plate 3 is slightly smaller than the width of the concave cavity 11, and the follow-up rotation adjusting plate 3 can be just inserted into the concave cavity 11; the diameter of the follow-up rotary adjusting plate 3 is 4-8 cm, and the thickness is 0.5-3 cm.

The lock catch pushing piece 33 extends and protrudes in a circumferential arc shape, and the front end of the lock catch pushing piece 33 is unlocked and locked in a turnover-type rotating mode by pushing the outer wall of the bottom low point of the rotating lock catch 2. The shape and structure of the concave cavity 11, the follow-up rotation adjusting plate 3 and the lock catch pushing piece 33 are reasonably arranged.

The technical scheme is further as follows: the fastener 32 is an arc-shaped extending protrusion, and the fastener 32 and the lock catch pushing piece 33 are arranged in a split manner. This is due to the shape and structure of the snap-in element 32, and the arrangement position between the snap-in element 32 and the lock catch pushing element 33.

The technical scheme is further as follows: the periphery left edge of follow-up rotation regulating plate 3 extends downwards and is equipped with the convex guard piece 34 of circumference arc shape, after follow-up rotation regulating plate 3 back upset, prevents that hasp rotation regulation breach 31 from exposing open accent 1101, prevents that people's finger from probably stretching into the intracavity from opening accent 1101 and causing careless tong, protects the security of holding up handle 4 with the upset.

The technical scheme is further as follows: a left upper lock hidden space 35 is formed between the guard 34 and the upper left of the lock rotation adjustment notch 31, and the left upper lock hidden space 35 is also a part of the lock rotation adjustment notch 31; a left lower lock catch hiding space 36 is formed between the lock catch pushing piece 33 and the left lower side of the lock catch rotation adjusting notch 31, and the left lower lock catch hiding space 36 is also a part of the lock catch rotation adjusting notch 31; the left upper lock catch hiding space 35 and the left lower lock catch hiding space 36 are enough spaces for the follow-up rotation adjustment plate 3 to have enough movement spaces for the rotation lock catch 2, and do not affect the arrangement positions of the protection member 34 and the lock catch pushing member 33, so that the left upper lock catch hiding space 35 and the left lower lock catch hiding space 36 are formed.

The technical scheme is further as follows: the middle of the follow-up rotation adjusting plate 3 is provided with a plate through hole 37, the left side wall and the right side wall in the middle of the cavity 11 are provided with through shaft holes 12, screws 13 transversely penetrate through the through shaft holes 12 and the plate through holes 37, and the screws 13 are fixedly connected to the handrail mounting seat 1, so that the follow-up rotation adjusting plate 3 is movably and transversely hung in the middle of the cavity 11; the movable structure that the follow-up rotation adjusting plate 3 is connected with the handrail mounting seat 1 is reasonably arranged;

two side walls at the lower left of the cavity 11 are provided with nail through holes 14, the middle of the corresponding rotary fastener 2 is transversely provided with a through hole 22, a lock nail 15 transversely penetrates through the nail through holes 14 and the through hole 22, and the lock nail 15 is fixedly connected to the handrail mounting seat 1, so that the rotary fastener 2 is movably transversely hung and connected at the lower left in the cavity 11; the movable structure that the rotary lock catch piece 2 is connected with the handrail installation seat 1 is reasonably arranged;

the technical scheme is further as follows: the follow-up rotation adjusting plate 3 is provided with hollow holes 39, the hollow holes 39 are used for energy-saving materials, and the quality of the follow-up rotation adjusting plate 3 is reduced.

The technical scheme is further as follows: the follow-up rotation adjusting plate 3 comprises a handle joint 38 with the top extending forwards, the follow-up rotation adjusting plate 3 and the handle joint 38 are integrally formed by injection molding, the lock catch rotation adjusting notch 31, the fastener 32, the lock catch pushing piece 33, the protection piece 34, the hollow hole 39 and the plate through hole 37 are also integrally formed, the handle joint 38 is fixedly connected with the armrest handle 4 in a threaded screwing or clamping or inserting mode, and the armrest handle 4 is made of plastic or metal or a composite of plastic and metal.

The technical scheme is further as follows: handrail mount pad 1 is injection moulding as an organic whole, including erection joint spare 1A and circular bulge 1B, and circular bulge 1B's top and front are inwards offered the cavity 11 of an open accent 1101 by the periphery lateral wall, and open accent 1101 is the open accent 1101 of circular arc periphery. After the handrail installation seat 1 is integrally formed by injection molding, a shaft penetrating hole 12, a nail penetrating hole 14, an installation connecting piece 1A, a circular protruding part 1B, an open cavity 1101, a cavity 11, a lower limiting wall 16 and a lower limiting wall 17 are also integrally formed.

The technical scheme is further as follows: the arc-shaped peripheral angle of the open cavity 1101 is 120-220 degrees, preferably 180 degrees.

The specific application embodiment is as follows:

a rotatable folding chair armrest belongs to chair components and comprises an armrest mounting seat 1, an armrest handle 4, a rotary locking piece 2 and a follow-up rotary adjusting plate 3; the armrest mounting seats 1 are used for being mounted on the left side wall and the right side wall of the backrest of the chair;

the handrail mounting seat 1 comprises a mounting connecting piece 1A and a circular protruding part 1B, the side wall of the mounting connecting piece 1A is extended to be connected with the circular protruding part 1B, the whole body is integrally injection-molded and is a hard plastic part after molding, the top and the front part of the circular protruding part 1B are hollowed inwards by the peripheral side wall to form a circular cavity 11 with an open cavity opening 1101, the open cavity opening 1101 is an open cavity opening 1101 with a circular arc periphery, and the arc periphery angle of the open cavity opening 1101 is 180 degrees (namely, one circumference of the circular protruding part 1B is based on 360 degrees, and half area of the circumference is the open cavity opening 1101), so that the maximum rotation angle of the handle joint 38 and the handrail 4 is 180 degrees; a lower limiting wall 16 is formed at the top rear cavity of the open cavity 1101, and a lower limiting wall 17 is formed at the front lower cavity; the lower limiting wall 16 is used for preventing the handle joint 38 from going beyond the rear position when the armrest handle 4 is lifted up to drive the follow-up rotation adjusting plate 3 to turn over, the lower limiting wall 17 is used for preventing the handle joint 38 from going beyond the lower position when the armrest handle 4 is pressed down to drive the follow-up rotation adjusting plate 3 to turn over downwards, so that the handle joint 38 can only rotate and work in the range of an open cavity 1101 between the lower limiting wall 16 and the lower limiting wall 17, and the opposite armrest handle 4 can only rotate and adjust in the range of a cavity between the lower limiting wall 16 and the lower limiting wall 17;

the follow-up rotation adjusting plate 3 comprises a handle joint 38 with the top extending forwards, the follow-up rotation adjusting plate 3 and the handle joint 38 are integrally formed by injection molding, and the handle joint 38 is fixedly connected with the armrest handle 4; lock catch rotation adjusting notches 31 are formed in the left side of the peripheral side wall of the follow-up rotation adjusting plate 3 and below the left side of the peripheral side wall of the follow-up rotation adjusting plate, and the lock catch rotation adjusting notches 31 provide space for the rotation locking piece 2 in the rotation process; a convex fastener 32 extends from the side wall of the follow-up rotation adjusting plate 3 in the middle of the lock catch rotation adjusting notch 31; a convex lock catch pushing piece 33 extends from the lower side wall on the left side of the follow-up rotation adjusting plate 3 to the direction of the notch (the lock catch pushing piece 33 is used for pushing the rotary lock catch piece 2 to rotate, unlock and lock), the lock catch pushing piece 33 extends in a circumferential arc shape and protrudes, and the front end of the lock catch pushing piece 33 pushes the outer wall of the bottom low point of the rotary lock catch piece 2 to rotate, unlock and lock in a turnover mode;

the buckling piece 32 extends and protrudes in an arc shape, the buckling piece 32 and the lock catch pushing piece 33 are arranged in a split mode, and the buckling piece 32 is arranged above the lock catch pushing piece 33;

the protection piece 34 which is protruded in a circumferential arc shape extends downwards from the left edge of the periphery of the follow-up rotation adjusting plate 3, after the follow-up rotation adjusting plate 3 is turned over, the lock catch rotation adjusting notch 31 is prevented from being exposed out of the opening 1101, the fingers of a person are prevented from possibly extending into the cavity from the opening 1101 to cause careless clamping, and the safety of turning over the armrest handle 4 by hands is protected;

a left upper lock hidden space 35 is formed between the guard 34 and the upper left of the lock rotation adjustment notch 31, and the left upper lock hidden space 35 is also a part of the lock rotation adjustment notch 31; a left lower lock catch hiding space 36 is formed between the lock catch pushing piece 33 and the left lower side of the lock catch rotation adjusting notch 31, and the left lower lock catch hiding space 36 is also a part of the lock catch rotation adjusting notch 31; the left upper lock catch hiding space 35 and the left lower lock catch hiding space 36 are enough spaces for the follow-up rotation adjusting plate 3 to have enough moving spaces in the rotation process, so that the rotary lock catch 2 has enough moving spaces, and the arrangement positions of the protection piece 34 and the lock catch pushing piece 33 are not influenced, and therefore, the left upper lock catch hiding space 35 and the left lower lock catch hiding space 36 are formed;

the concave cavity 11 is flat, and the inner cavity of the concave cavity is circular; the follow-up rotation adjusting plate 3 is flat, the periphery of the follow-up rotation adjusting plate is circular, the thickness of the follow-up rotation adjusting plate 3 is slightly smaller than the width of the concave cavity 11, and the follow-up rotation adjusting plate 3 can be just inserted into the concave cavity 11;

the middle of the follow-up rotation adjusting plate 3 is provided with a plate through hole 37, the left side wall and the right side wall in the middle of the cavity 11 are provided with through hole holes 12, after the follow-up rotation adjusting plate 3 is inserted into the cavity 11, the through hole holes 12 and the through hole holes are transversely penetrated through screws 13, the screws 13 are fixedly connected to the handrail mounting seat 1 in a nut or riveting mode, and therefore the follow-up rotation adjusting plate 3 is movably and transversely hung and connected in the middle of the cavity 11 by taking the middle as the center;

two side walls at the left lower side of the cavity 11 are provided with nail through holes 14, the middle of the corresponding rotary fastener 2 is transversely provided with a through hole 22, after the rotary fastener 2 is inserted into the left lower side of the cavity 11, a lock nail 15 transversely penetrates through the nail through holes 14 and the through hole 22, the lock nail 15 is fixedly connected to the handrail mounting seat 1 in a nut or riveting mode, so that the rotary fastener 2 is movably and transversely hung and connected at the left lower side in the cavity 11 by taking the middle as the center, the upper end and the lower end of the rotary fastener 2 are provided with fastener grooves 21, and the two fastener grooves 21 are identical in structure and are arranged oppositely; the rotary locking piece 2 is a solid square, is integrally injection-molded through an injection molding machine, and is a hard plastic part after molding.

The lock catch pushing piece 33, the buckle piece 32 and the lock catch groove 21 are matched to unlock and lock, after the lock catch pushing piece 33 pushes the rotary lock catch piece 2 to rotate vertically, the buckle piece 32 is in a locking and locking state when falling into the lock catch groove 21, and the handrail handle 4 is unfolded and transversely arranged and fixed; conversely, when the latch pushing member 33 pushes the rotary latch 2 to rotate non-vertically, the latch 32 is unlocked when it is separated from the latch slot 21, and the handle 4 can be folded down.

The upper and lower ends of the rotary latch member 2 are both provided with latch grooves 21, and the locking state is achieved when the fastener 32 falls into the latch groove 21 at any end.

The folding and storage working process of the armrest handle is as follows:

as shown in fig. 9 to 13: in a normal state, the handrail handle 4 is horizontally and transversely arranged and is in an unfolded use state for the handrail handle 4, the rotating locking piece 2 belongs to a vertical state, the buckling piece 32 falls into the locking groove 21 for clamping and fixing, and the rotating locking piece 2 supports the tightly following rotating adjusting plate 3 for fixing, so that the handrail handle 4 can be horizontally and transversely fixed, and a person can press the handrail handle 4 or hold the handrail handle 4 for use.

When the foldable storage box is folded, the armrest handle 4 is held by a hand and turned backwards to be lifted, the follow-up rotary adjusting plate 3 rotates anticlockwise in a follow-up mode, the lock catch pushing piece 33 also rotates anticlockwise, the buckle piece 32 is separated from the lock catch groove 21, the lock catch pushing piece 33 pushes the bottom end of the rotary lock catch piece 2 to rotate anticlockwise in a rotating process, and the rotary lock catch piece 2 does not block the buckle piece 32 from rotating along with the follow-up rotary adjusting plate 3 any more; the rotary locking piece 2 always rotates anticlockwise;

then clockwise pushes down handrail handle 4 again, and follow-up rotation regulating plate 3 follow-up clockwise rotation, and hasp impeller 33 is clockwise rotation also, and when rotatory to the utmost extent, handrail handle 4 is down and accomplish down folding and accomodate.

The unfolding working process of the armrest handle is as follows:

as shown in fig. 14 to 16: under the normal state, the armrest handle 4 is in a folded storage state downwards, after the armrest handle 4 is folded and stored, when the armrest handle 4 needs to be opened again for use, the armrest handle 4 is held by a hand and is turned upwards to be lifted, the armrest handle is turned upwards anticlockwise and is lifted, the follow-up rotating adjusting plate 3 rotates anticlockwise in a follow-up mode, the lock catch pushing piece 33 also rotates anticlockwise, the lock catch pushing piece 33 pushes the bottom end of the rotating locking piece 2 to rotate anticlockwise in the rotating process, when the follow-up rotating adjusting plate 3 rotates anticlockwise to the maximum, the rotating locking piece 2 is just turned into a vertical state in a pushed mode, the lock catch groove 21 is centered upwards, the armrest handle 4 is pressed clockwise, the follow-up rotating adjusting plate 3 rotates clockwise, the buckling piece 32 can fall into the lock catch groove 21 to be clamped and fixed, the rotating locking piece 2 supports the follow-up rotating adjusting plate 3 to be fixed, therefore, the armrest handle 4 can be horizontally and transversely fixed, and a hand of a person can be pressed on the armrest handle 4 or the armrest handle 4 to be held tightly for use.

The rotating locking piece 2 rotates 180 degrees to perform an unfolding and folding storage process.

Claims (10)

1. The utility model provides a rotatable folding chair handrail, belongs to the chair part, including handrail mount pad, handrail handle, its characterized in that: the rotary lock catch also comprises a rotary lock catch piece;

the top and the front part of the handrail mounting seat are provided with a concave cavity with an open cavity opening inwards from the peripheral side wall, a rear limiting wall is formed at the rear cavity opening of the open cavity opening, and a lower limiting wall is formed at the front lower cavity opening; the rotary locking fastener is movably and transversely hung and connected to the lower left part in the cavity by taking the middle as the center, and the upper end and the lower end of the rotary locking fastener are provided with locking grooves;

the root of the armrest handle is connected with a follow-up rotation adjusting plate, lock catch rotation adjusting notches are formed in the left side of the periphery of the follow-up rotation adjusting plate and below the left side of the periphery of the follow-up rotation adjusting plate, and the lock catch rotation adjusting notches provide space for a rotation lock catch piece in the rotation process;

the follow-up rotation adjusting plate is movably transversely hung and connected in the middle of the cavity by taking the middle as a center, and the armrest handle can only be rotatably adjusted in the cavity opening range between the rear limiting wall and the lower limiting wall;

a convex fastener extends from the side wall of the follow-up rotation adjusting plate positioned in the middle of the lock catch rotation adjusting notch;

a convex lock catch pushing piece extends from the side wall below the left side of the follow-up rotation adjusting plate to the direction of the notch, and the lock catch pushing piece is used for pushing the rotation lock catch piece to rotate, unlock and lock;

the lock catch pushing piece, the buckle piece and the lock catch groove are matched for unlocking and locking, after the lock catch pushing piece pushes the rotary lock catch piece to rotate vertically, the buckle piece is in a locking and locking state when falling into the lock catch groove, and the handrail handle is unfolded and transversely arranged and fixed; on the contrary, after the lock catch pushing piece pushes the rotary lock catch piece to rotate and not to be vertical, the buckle piece is in an unlocking state when being separated from the lock catch groove, and the handrail handle can be rotated and folded downwards.

2. The rotatable armrest of a folding chair as claimed in claim 1, wherein: the concave cavity is flat, and the inner cavity of the concave cavity is circular; the follow-up rotation adjusting plate is flat, the periphery of the follow-up rotation adjusting plate is circular, the thickness of the follow-up rotation adjusting plate is smaller than the width of the concave cavity, and the follow-up rotation adjusting plate can be just inserted into the concave cavity;

the lock catch pushing piece is extended and protruded in a circumferential arc shape, and the front end of the lock catch pushing piece is rotationally unlocked and locked in a turnover mode by pushing the outer wall of the bottom low point of the rotary lock catch piece.

3. The rotatable armrest of a folding chair as claimed in claim 1, wherein: the buckle piece is arc-shaped and extends and protrudes, and the buckle piece and the lock catch pushing piece are arranged in a split mode.

4. The rotatable armrest of a folding chair as claimed in claim 1, wherein: the periphery left edge of follow-up rotation regulating plate is followed the downwardly extending and is had the convex guard piece of circumference arc.

5. The armrest of claim 4, wherein: a left upper lock catch hiding space is formed between the protection piece and the left upper part of the lock catch rotation adjusting notch, and the left upper lock catch hiding space is also a part of the lock catch rotation adjusting notch.

6. The armrest of claim 1, wherein: a left lower lock buckle hiding space is formed between the lock buckle pushing piece and the left lower side of the lock buckle rotation adjusting notch, and the left lower lock buckle hiding space is also a part of the lock buckle rotation adjusting notch.

7. A rotatable armrest for a folding chair as claimed in any one of claims 1 to 6, wherein: the middle of the follow-up rotation adjusting plate is provided with a plate through hole, the left side wall and the right side wall in the middle of the concave cavity are provided with a through shaft hole, a screw transversely penetrates through the through shaft hole and the plate through hole, and the screw is fixedly connected to the handrail mounting seat, so that the follow-up rotation adjusting plate is movably and transversely hung in the middle of the concave cavity;

two side walls at the left lower side of the cavity are provided with nail through holes, the middle of the corresponding rotary locking piece is transversely provided with a through hole, a locking nail transversely penetrates through the nail through holes and the through hole, and the locking nail is fixedly connected to the handrail mounting seat, so that the rotary locking piece is movably transversely hung and connected at the left lower side in the cavity;

the follow-up rotation adjusting plate is provided with a hollow hole.

8. A rotatable armrest for a folding chair as claimed in any one of claims 1 to 6, wherein: the follow-up rotation adjusting plate comprises a handle joint extending forwards from the top, the follow-up rotation adjusting plate and the handle joint are integrally formed by injection molding, and the handle joint is fixedly connected with a handrail.

9. A rotatable armrest for a folding chair as claimed in any one of claims 1 to 6, wherein: the handrail mount pad is injection moulding as an organic whole, including erection joint spare and circular bulge, and the top and the front portion of circular bulge are by the periphery lateral wall toward interior cavity of seting up an open accent, and open accent is the open accent of convex periphery.

10. The rotatable armrest of a folding chair as claimed in claim 9, wherein: the arc peripheral angle of the opening cavity is 120-220 degrees.

Images