A telescopic sitting and lying chair

Abstract

The telescopic chair for sitting and lying is provided in the present invention. The left and right upper frame cross pieces, the left and right lower frame cross pieces, the left and right front main support pieces and the left and right rear main support pieces of the chair frame respectively form two parallelogram mechanisms on the left and right sides. The left and right sides of the seat part respectively form left and right guide rail motion pairs with the left and right upper frame cross pieces. The locking assembly is arranged on a pair of parts with relative motion, and the armrest assembly is arranged between the chair back part and the chair frame part. When the locking assembly is locked, the chair is in the sitting position. When it is released, the parallelogram mechanism rotates backward, the chair back, the seat, the armrest and the telescopic member are linked, the chair back and the seat are lengthened, and the seat part is translated downward to the lying position, so that the conversion between sitting and lying can be realized at one time. The present invention makes full use of the motion characteristics of the parallelogram mechanism, has telescopic characteristics, has the advantages of simple structure, simple use, small floor occupation, small space, low cost, etc., and is expected to solve the two major problems of mass consumption and limitations in use that are difficult to achieve in current sitting and lying chairs.

Description

Technical Field

[0001] The invention relates to the technical field of furniture, in particular to a telescopic sitting and lying chair. Background Art

[0002] Existing dual-purpose chairs for sitting and lying have solved two common problems in daily life: "the harm caused by long-term sitting" and "the benefits brought by taking a nap". However, existing dual-purpose chairs for sitting and lying have two major problems: it is difficult to realize mass consumption and the limitations of use. For example:

[0003] 1) At present, many computer chairs, boss chairs and racing chairs on the market have added retractable or foldable footrests, which, combined with the adjustable backrest angle, add the function of lying / resting. For example, they are equipped with patent number ZL2015210134233 "a foldable footrest device" or patent number ZL201320071075X "a chair footrest". However, this type of chair needs to be used for both sitting and lying: ① When sitting or lying, it has a high backrest, a high seat and a high footrest of fixed size; ② The height of the chair for sitting and lying is determined by the height of the seat, and when lying, it is at the same height as the sitting position, so that the chair occupies a larger space when lying; ③ In order to prevent the center of gravity of the human body from shifting backward after lying down and causing the chair to tip backward, the area of ​​the chair legs contacting the ground must be large enough; ④ The comfort of the footrest is limited by the strength, extension length and size of the footrest, and its comfort is not as good as that of a recliner; ⑤ To achieve sitting or lying, a chair back, seat and footrest and their adjustment mechanism are required. The first four points bring about the shortcomings of existing reclining chairs, such as large space and area occupied, and the problem of footrest comfort; the fifth point brings about the disadvantages of high cost and inconvenient operation. As a result, there are two major problems: ① It is difficult for existing reclining chairs to achieve mass consumption; ② The limitations of use make it difficult to use them in crowded places.

[0004] 2) The "retractable sitting and lying dual-purpose office and study chair" with application number 201721517914.0 greatly reduces the floor area occupied when sitting and the space occupied when lying; omits the footrest device, simplifies the structure and operation, and reduces the product cost. As a result, it better solves the two major problems of the current sitting and lying dual-purpose chairs, namely, the difficulty in realizing mass consumption and the limitations in use.

[0005] However, the patent application technology still has room for improvement and enhancement: ① For example, in the first implementation example, there is room for improvement in its armrests and operation, etc. - the linkage, structure and use can be more refined and upscale; ② For example, in the second implementation example, there is a complex structure of positioning parts and auxiliary parts that require four auxiliary support parts; there is a disadvantage that the chair is not fully extended when lying down; ③ Although the above two implementation examples are examples under the same scheme, it is difficult to achieve modular design and production. All these make the technology still have room for improvement in development methods, structure, processing, use and cost, and it can be more refined, further improve the level of popular application and change the limitations of use. Summary of the invention

[0006] The main purpose of the present invention is to provide a telescopic sitting and lying dual-purpose chair, which is an improvement and upgrade of the "telescopic sitting and lying dual-purpose office and study chair" with application number 201721517914.0. It makes fuller use of the motion characteristics of the main mechanism of the "telescopic sitting and lying dual-purpose office and study chair" - the parallelogram mechanism, improves and upgrades the structure, use and operation of the "telescopic sitting and lying dual-purpose office and study chair", simplifies the manufacturing process, realizes modular, standardized, serialized development and production, and attempts to further solve the two major problems of mass consumption and limitations in use that are difficult to achieve in current sitting and lying chairs.

[0007] In order to achieve the above-mentioned main purpose, the present invention is realized through the following technical solutions. It is mainly composed of a chair back component, a chair seat component, a chair frame component and a locking assembly. The chair back component is mainly composed of two back side components and a back inner component. The two back side components are a left back side component and a right back side component. The back inner component is connected to the appropriate positions of the two back side components. The chair seat component is mainly composed of two seat side components, a seat component and a seat cross component. The two seat side components are a left seat side component and a right seat side component. The left seat side component is fixedly connected to the left side of the seat component, and the right seat side component is fixedly connected to the right side of the seat component. The left and right ends of the seat cross component are respectively fixedly connected to the appropriate positions of the left seat side component and the right seat side component. The chair frame components are mainly composed of four main support members, two upper frame cross members, two lower frame cross members, secondary support members, pins, telescopic members and reinforcement members. The four main support members are the left front main support member, the left rear main support member, the right front main support member and the right rear main support member. The two upper frame cross members are the left upper frame cross member and the right upper frame cross member. The two lower frame cross members are the left lower frame cross member and the right lower frame cross member. The pins are the left pin and the right pin. The front end of the left upper frame cross member is movably connected to the upper end of the left front main support member. The rear end of the left upper frame cross member is movably connected to the appropriate position of the left rear main support member through the left pin. The front end of the right upper frame cross member is movably connected to the upper end of the right front main support member. The rear end of the frame crosspiece is movably connected to the appropriate position of the right rear main support member through the right pin shaft, the front end of the left lower frame crosspiece is movably connected to the lower position of the left front main support member, the rear end of the left lower frame crosspiece is movably connected to the lower position of the left rear main support member, the front end of the right lower frame crosspiece is movably connected to the lower position of the right front main support member, the rear end of the right lower frame crosspiece is movably connected to the lower position of the right rear main support member, the left four-bar mechanism composed of the left upper frame crosspiece, the left lower frame crosspiece, the left front main support member and the left rear main support member is a left parallelogram mechanism, and the right four-bar mechanism composed of the right upper frame crosspiece, the right lower frame crosspiece, the right front main support member and the right rear main support member is a right parallelogram mechanism. The secondary support member is connected to the rear of the telescopic member, the telescopic member is movably connected to the space enclosed by the two seat side members, the seat member and the seat cross member of the seat component, and the two ends of the reinforcement member are respectively fixed to the left front main support member and the right front main support member. The left end of the seat cross member of the seat component and the left upper frame cross member of the chair frame component form a left motion guide pair, and the right end of the seat cross member of the seat component and the right upper frame cross member of the chair frame component form a right motion guide pair. The locking assembly is arranged on the pair of parts that have relative motion.

[0008] A pushed part is arranged at a suitable position of the seat component, and the pushed part is divided into a left pushed part and a right pushed part. The left pushed part is arranged on the left side of the seat component, and the right pushed part is arranged on the right side of the seat component. Two groups of armrest assemblies are arranged between the backrest component and the frame component, and the armrest assemblies are composed of a handrail, a connecting piece and a straight piece. The two groups of armrest assemblies are divided into a left armrest assembly and a right armrest assembly. The left armrest assembly is mainly composed of a left handrail, a left connecting piece and a left straight piece, and the right armrest assembly is mainly composed of a right handrail, a right connecting piece and a right straight piece. One end of the left handrail is movably connected to a suitable position of the left back side part of the backrest component, and the other end of the left handrail is movably connected to one end of the left connecting piece, and the other end of the left connecting piece is movably connected to the left straight piece. The upper end of the left straight piece is movably connected, the lower end of the left straight piece is fixedly connected to the appropriate position of the left lower frame cross piece of the chair frame component, one end of the right handrail is movably connected to the appropriate position of the right back side piece of the chair back component, the other end of the right handrail is movably connected to one end of the right connecting piece, the other end of the right connecting piece is movably connected to the upper end of the right straight piece, the lower end of the right straight piece is fixedly connected to the appropriate position of the right lower frame cross piece of the chair frame component, the left straight piece is movably connected to the left pushed piece, and the right straight piece is movably connected to the right pushed piece.

[0009] The locking assembly is arranged on the pair of parts with relative movement as follows: the pair of parts with relative movement are the straight piece of the armrest assembly and the pushed piece of the seat component, the straight piece and the pushed piece are a movable connection pair, and the locking assembly arranged between the movable connection pair is a movable locking assembly, and the movable locking assembly mainly consists of a locking piece, a positioning shell, a tension spring I and a positioning pin, the locking piece is provided with a groove, and its front end is an inclined surface, the positioning shell is fixedly connected to the appropriate position of the straight piece, the appropriate position of the positioning shell is provided with a hole, the locking piece and the positioning shell are movably connected, the positioning pin passes through the hole on the positioning shell, the groove on the locking piece and the hole on the straight piece respectively, and is fixedly connected, one end of the tension spring I is connected to the positioning pin, and the other end of the tension spring I is connected to the locking piece, and the front end of the locking piece can support the pushed piece.

[0010] The locking assembly is arranged on the pair of parts with relative movement as follows: the pair of parts with relative movement are the back side part of the chair back part and the seat cross part of the chair seat part, and the locking assembly arranged between the back side part and the seat cross part is a closed locking assembly I, which is mainly composed of an elastic closing hook part I and a fastening part I, one end of the closing hook part I is a bent hook, and the closing hook part I is fixedly connected to the appropriate position of the back side part by the fastening part I, and the bent hook of the closing hook part I can hook the side of the seat cross part.

[0011] The locking assembly is arranged on the pair of parts with relative movement as follows: the pair of parts with relative movement are the back side part of the chair back part and the seat cross part of the chair seat part, and another locking assembly arranged between the back side part and the seat cross part is a closed locking assembly II, which is mainly composed of a hook part II, a fastening part II, and a compression spring. After the fastening part II passes through the hole of the hook part II, it is connected to the back side part, and the compression spring is arranged between the hook part II and the head of the fastening part II. The two ends of the hook part II are hooks, and the hook at one end of the hook part II is hooked on the side of the back side part, and the hook at the other end of the hook part II can hook the side of the seat cross part.

[0012] The locking assembly is arranged on the pair of parts with relative movement as follows: the pair of parts with relative movement are the back side piece of the chair back component and the appropriate part of the seat component, the locking assembly composed of the back side piece and the appropriate part of the seat component is a hook-type locking assembly, and the hook-type locking assembly consists of a hook end piece, a positioning pin, a tension spring II and a control pin, the hook end piece is movably connected to the back side piece, the control pin is fixedly connected to the appropriate position of the back side piece, the positioning pin is fixedly connected to the appropriate part of the seat component, one end of the tension spring II is connected to the back side piece, and the other end of the tension spring II is connected to the hook end piece.

[0013] Positioning members are respectively arranged at appropriate positions of the left front main supporting member and the right front main supporting member, and the positioning members can be placed on the left lower frame cross member and the right lower frame cross member.

[0014] A limiting member is arranged between the telescopic member and the seat member.

[0015] The left pin shaft and the right pin shaft of the chair frame component are connected together as shaft members, and the upper part of the auxiliary supporting member is connected to the shaft member.

[0016] The length of the secondary supporting member is adjustable.

[0017] Through the above structure, the telescopic sitting and lying chair can be mainly composed of the following three typical products:

[0018] 1) With armrest assembly. The backrest, seat, auxiliary support, telescopic part, armrest assembly and movable locking assembly are linked; 2) Without armrest assembly. The auxiliary support, telescopic part and backrest are linked, and the combined locking assembly I and seat are manual; 3) Without armrest assembly. The auxiliary support, telescopic part, combined locking assembly II and seat are manual. The specific operations and actions of these three products are as follows.

[0019] 1. Armrest assembly: The main operation and linkage of the product with chair back, chair seat, auxiliary support, telescopic parts, armrest assembly and movable locking assembly.

[0020] When the movable locking assembly is in the locked state, the locking piece of the movable locking assembly presses against the lower plane of the pushed piece, and the chair is in the high sitting position. When sitting, the floor space occupied is minimal. Pulling apart the locking pieces of the two sets of movable locking assemblies, the locking pieces disengage from the pushed piece, and the movable locking assembly is in the loosened state, so that the back of the chair rotates backwards - the two parallelogram mechanisms on the left and right rotate backwards. The motion characteristics of the mechanism make the seat always in the position of front-back and up-down translation; the motion characteristics of the mechanism make the distance of the two upper frame cross pieces moving backwards and downwards larger than the distance of the two lower frame cross pieces moving backwards and downwards. Therefore, 1) the seat component connected to the upper frame cross piece moving guide pair, under the condition that the pushed piece set thereon is blocked by the left and right straight pieces, makes its backward translation distance smaller than the upper frame cross piece, thus: ① the seat component moves forward relative to the position of the upper frame cross piece; ② the shaft connected to the rear main support member and pulled by the auxiliary support member, most of the telescopic member is pulled out of the seat component. The seat moves forward and the telescopic part moves backward, which greatly lengthens the length of the seat or the backrest; 2) The distance that the upper frame cross piece moves downward is greater than the distance that the lower frame cross piece moves downward. When changing from a sitting position to a lying position, the left and right straight pieces will gradually rise above the seat piece, so that the left and right armrest assemblies are in a suitable position when lying; 3) After the auxiliary support piece pulled out by the shaft touches the ground, the chair occupies the smallest space and the largest ground surface, which is the best state for a lying position. Reverse rotation of the backrest component - the left and right parallelogram mechanisms rotate forward. The above-mentioned upper frame cross piece and other parts move in the opposite direction. When the chair returns to the sitting position, the locking piece connected to the left and right straight pieces again presses against the lower plane of the pushed piece, and the movable locking assembly is automatically locked.

[0021] The grade of this kind of reclining chair with this technology is improved. Only one operation is needed to realize the linkage of the armrest assembly, the backrest, the seat, the auxiliary support, the telescopic member and the movable locking assembly, so that the change between sitting and lying can be realized at one time, and the operation is simple and convenient; when sitting, the chair is retracted and occupies less ground; when lying, the chair is extended, the seat or the backrest is lengthened, the contact surface between the chair and the ground is large, safe, but occupies less space; the seat position is lowered, the feet are placed on the ground, and the adjustment mechanisms and parts such as the footrest device and the backrest are omitted, and the manufacturing cost is low.

[0022] 2. No armrest assembly. The main operations and movements of the product include the auxiliary support, telescopic parts and chair back linkage, combined locking assembly I and manual seat.

[0023] When the combined locking assembly I is in the locked state, the hook of the elastic hook member I hooks the side of the seat cross member. The chair is in the high sitting position. When sitting, the floor space is minimal. The hook of the hook member I is separated from the seat cross member, and the two combined locking assemblies I are released, so that the chair back rotates backwards - the two parallelogram mechanisms on the left and right rotate backwards. The motion characteristics of the mechanism make the seat always in a position of forward and backward, up and down translation; the motion characteristics of the mechanism make the distance of the two upper frame cross members moving backward and downward greater than the distance of the two lower frame cross members moving backward and downward. Therefore, 1) the seat part connected to the upper frame cross member motion guide pair is pulled forward by hand; 2) the telescopic part is pulled out of the seat part by the shaft part connected to the rear main support member and through the pull of the auxiliary support member. The seat part moves forward and the telescopic part moves backward, which greatly lengthens the length of the seat or the backrest. 3) After the auxiliary support part pulled out by the shaft part touches the ground, the chair occupies the smallest space and the largest ground, which is the best state for lying. Reverse rotation of the backrest part - the left and right parallelogram mechanisms rotate forward. The above-mentioned upper frame cross member moves in the opposite direction. When the chair returns to the sitting position, the hook of the hook member I hooks the side of the seat cross member again, and the closed locking assembly I is in the locked state again.

[0024] This simplified sitting and lying chair of this technology has the largest contact area with the ground and is safe; the seat position is lowered and the feet are placed on the ground, eliminating the footrest device, armrest assembly and some adjustment mechanisms and parts. It is simpler and more compact in structure, simpler in process and lower in cost than the previous sitting and lying chair; when changing from sitting to lying, the auxiliary support part, telescopic part and chair back are linked, and the operation is relatively convenient and simple.

[0025] 3. No armrest assembly. The main operations and movements of the auxiliary support, telescopic parts, combined locking assembly II and manual seat.

[0026] When the combined locking assembly II is in the locked state, the hook at one end of the combined hook member II hooks the side of the back member, and the hook at the other end of the combined hook member II hooks the side of the seat cross member. The chair is in the high sitting position. When sitting, the floor space occupied is minimal. The hook of the combined hook member II hooked on the seat cross member is released, and the combined locking assembly II is opened, so that the chair back rotates backwards - the two parallelogram mechanisms on the left and right rotate backwards. The motion characteristics of the mechanism make the seat member always in a position of forward and backward, up and down translation; the motion characteristics of the mechanism make the distance that the two upper frame cross members translate backwards and downwards greater than the distance that the two lower frame cross members translate backwards and downwards. Therefore, 1) the seat member connected to the upper frame cross member motion guide pair is pulled forward by hand; 2) the auxiliary support member connected to the telescopic member is pulled backward by hand. Since the pull-out position of the telescopic member is not limited by the parallelogram mechanism, the auxiliary support member and the telescopic member can be set to the required position within a certain range. The seat part moves forward and the telescopic part is pulled out backward, which greatly lengthens the length of the seat or the backrest; 3) After the pulled-out auxiliary support part touches the ground, the chair occupies the smallest space and the largest ground, which is the best state for lying. Reverse rotation of the backrest part - the left and right parallelogram mechanisms rotate forward. The above-mentioned upper frame cross member moves in the opposite direction. When the chair returns to the sitting position, the hook of the combined locking component II hooks the side of the seat cross member again, and the combined locking component II is in the locked state again.

[0027] This simplified sitting and reclining chair has the largest contact area with the ground and is safe; the seat is lowered and the feet are placed on the ground, eliminating the footrest device, armrest assembly and many adjustment mechanisms and shaft parts. It is simpler and more compact than the second type of sitting and reclining chair, with simpler process and lower cost; when changing from sitting to lying, the backrest component and the combined locking component II are linked, and the operation is more convenient and simple. The biggest advantage of this type of sitting and reclining chair is that the position of the auxiliary support and the telescopic part is not limited by the parallelogram mechanism, and the range of selection is wide.

[0028] To sum up, the present invention improves and upgrades the structure, use and operation of the "telescopic sitting and lying dual-purpose office and study chair" on the basis of more fully utilizing the motion characteristics of the parallelogram mechanism, the main mechanism of the "telescopic sitting and lying dual-purpose office and study chair" with application number 201721517914.0, simplifies the manufacturing process, facilitates modular, standardized and serialized development and production, reduces manufacturing costs, shortens the production cycle, and can further solve the two major problems of mass consumption and usage limitations that are difficult to achieve in current sitting and lying chairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The best implementation scheme of the present invention will be described below with reference to the accompanying drawings.

[0030] Figure 1 A left side schematic diagram of a telescopic sitting and lying chair in a preferred embodiment of an armrest assembly;

[0031] Figure 2 for Figure 1 A-direction schematic diagram;

[0032] Figure 3 for Figure 2 Schematic diagram of direction B;

[0033] Figure 4 It is a left side schematic diagram of another preferred embodiment of a telescopic sitting and lying chair without an armrest assembly;

[0034] Figure 5 for Figure 4 Schematic diagram of C direction;

[0035] Figure 6 for Figure 5 D-direction schematic diagram. DETAILED DESCRIPTION

[0036] The following is a detailed description of Example 1 and Example 2 of the present invention in conjunction with the accompanying drawings.

[0037] See Figure 1 and Figure 2 and Figure 3 The first embodiment of the present invention mainly consists of five parts, namely, a backrest component 1, a seat component 2, a frame component 3, a locking assembly 4 and an armrest component 5. The backrest component 1 mainly consists of two back side components 1-1 and a back inner component 2-1. The two back side components 1-1 are a left back side component 1-1-1 and a right back side component 2-1-1. The back inner component 2-1 is fixedly connected to the two back side components 1-1. The seat component 2 mainly consists of two seat side components 1-2, a seat component 2-2 and two seat cross components 3-2 ( Figure 3 The two seat side members 1-2 are a left seat side member 1-1-2 and a right seat side member 2-1-2, the left seat side member 1-1-2 and the right seat side member 2-1-2 are respectively fixedly connected to the left and right sides of the seat member 2-2, and the left and right ends of the two seat cross members 3-2 are respectively fixedly connected to the left seat side member 1-1-2

[0038] And on the right seat side piece 2-1-2. The chair frame component 3 is mainly composed of four main support members 1-3, two upper frame cross members 2-3, two lower frame cross members 3-3, auxiliary support members 4-3, pins 5-3, telescopic members 6-3 and reinforcement members 7-3. The four main support members 1-3 are the left front main support member 1-1-3, the left rear main support member 2-1-3, the right front main support member 3-1-3 and the right rear main support member 4-1-3. The two upper frame cross members 2-3 are the left upper frame cross member 1-2-3 and the right upper frame cross member 2-2-3. The two lower frame cross members 3-3 are the left lower frame cross member 1-3-3 and the right lower frame cross member 2-3-3. The pins 5-3 are the left pins 1-5-3 and the right pins 2-5-3. In this example, the left pins 1-5-3 and the right pins 2-5-3 are connected together by the shaft member 8-3 ( Figure 2The front end of the left upper frame cross member 1-2-3 is slidably connected to the upper end of the left front main support member 1-1-3, the rear end of the left upper frame cross member 1-2-3 is slidably connected to the upper end of the left rear main support member 2-1-3 through the left pin shaft 1-5-3 (i.e., the left end of the shaft member 8-3), the front end of the right upper frame cross member 2-2-3 is slidably connected to the upper end of the right front main support member 3-1-3, the rear end of the right upper frame cross member 2-2-3 is slidably connected to the right rear main support member 4-1-3 through the right pin shaft 2-5-3 (i.e., the right end of the shaft member 8-3), the front end of the left lower frame cross member 1-3-3 is slidably connected to the lower part of the left front main support member 1-1-3 Then, the rear end of the left lower frame cross member 1-3-3 is slidably connected to the lower part of the left rear main support member 2-1-3, the front end of the right lower frame cross member 2-3-3 is slidably connected to the lower part of the right front main support member 3-1-3, the rear end of the right lower frame cross member 2-3-3 is slidably connected to the lower part of the right rear main support member 4-1-3, the left upper frame cross member 1-2-3, the left lower frame cross member 1-3-3, the left front main support member 1-1-3 and the left rear main support member 2-1-3 form a left parallelogram mechanism, and the right upper frame cross member 2-2-3, the right lower frame cross member 2-3-3, the right front main support member 3-1-3 and the right rear main support member 4-1-3 form a right parallelogram mechanism. The two ends of the reinforcing member 7-3 are respectively fixedly connected to the left front main support member 1-1-3 and the right front main support member 3-1-3, and the extended ends of the two ends of the reinforcing member 7-3 can be placed on the left lower frame cross member 1-3-3 and the right lower frame cross member 2-3-3 (the extended ends are equivalent to the positioning members 9-3 arranged on the left front main support member 1-1-3 and the right front main support member 3-1-3). The auxiliary support member 4-3 is fixedly connected to the rear of the telescopic member 6-3, and the upper part of the auxiliary support member 4-3 is connected to the shaft member 8-3. The telescopic member 6-3 is slidably connected to the space enclosed by the two seat side members 1-2, the seat member 2-2 and the two seat cross members 3-2 of the seat member 2. The left ends of the two seat cross members 3-2 and the left upper frame cross member 1-2-3 form a left motion guide pair, and the right ends of the two seat cross members 3-2 and the right upper frame cross member 2-2-3 form a right motion guide pair.

[0039] A total of four pushed members 4-2 are arranged on the seat member 2, and the four pushed members are divided into two left pushed members 1-4-2 and two right pushed members 2-4-2. The two left pushed members 1-4-2 are further divided into left pushed members I 1-1-4-2 and left pushed members II 2-1-4-2, and the two right pushed members 2-4-2 are further divided into right pushed members I 1-2-4-2 and right pushed members II 2-2-4-2. In this example, the left pushed member I1-1-4-2 and the right pushed member I 1-2-4-2 are connected as a whole and fixedly connected to the front seat cross member 3-2 ( Figure 3As shown in the upper dotted line, the left pushed member II 2-1-4-2 and the right pushed member II 2-2-4-2 are respectively fixedly connected to the left seat side member 1-1-2 and the right seat side member 2-1-2, and two groups of armrest assemblies 5 are arranged between the chair back member 1 and the chair frame member 3. The armrest assembly 5 consists of a handrail 1-5, a connecting member 2-5 and a straight member 3-5. The two groups of armrest assemblies 5 are a left armrest assembly Z-5 and a right armrest assembly Y-5. The left armrest assembly Z-5 consists of a left handrail 1-Z-5, a left connecting member 2-Z-5 and a left straight member 3-Z-5. The right armrest assembly Y-5 consists of a right handrail 1-Y-5, a right connecting member 2-Y-5 and a right straight member 3-Y-5. One end of the left handrail 1-Z-5 is slidably connected to the left back side member 1-1-1 of the chair back member 1. The left handrail 1-Z-5 is slidably connected to the left back side member 1-1-1 of the chair back member 1. The other end of 5 is slidably connected to one end of the left connecting member 2-Z-5, the other end of the left connecting member 2-Z-5 is slidably connected to the upper end of the left straight member 3-Z-5, the lower end of the left straight member 3-Z-5 is fixedly connected to the left lower frame cross member 1-3-3 of the chair frame component 3, one end of the right handrail 1-Y-5 is slidably connected to the right back side member 2-1-1 of the chair back component 1, the other end of the right handrail 1-Y-5 is slidably connected to one end of the right connecting member 2-Y-5, the other end of the right connecting member 2-Y-5 is slidably connected to the upper end of the right straight member 3-Y-5, the lower end of the right straight member 3-Y-5 is fixedly connected to the right lower frame cross member 2-3-3 of the chair frame component 3, the left straight member 3-Z-5 and the left pushed member I 1-1-4-2 and the left pushed member II 2-1-4-2 are slidingly connected, and the right straight member 3-Y-5 and the right pushed member I 1-2-4-2 and the right pushed member II 2-2-4-2 are slidingly connected.

[0040] The locking assembly 4 is two sets of movable locking assemblies Y-4 set on both sides of the reclining chair, each set of movable locking assemblies Y-4 is composed of a locking member 1-Y-4, a positioning shell 2-Y-4, a tension spring 1 3-Y-4 and a positioning pin 4-Y-4 ( Figure 2 The locking member 1-Y-4 is composed of a groove, a front end of which is an inclined surface, a positioning shell 2-Y-4 is fixedly connected to the straight member 3-5, a hole is provided on the positioning shell 2-Y-4, the locking member 1-Y-4 is slidably connected with the positioning shell 2-Y-4, and the positioning pin 4-Y-4 passes through the hole on the positioning shell 2-Y-4, the groove on the locking member 1-Y-4 and the hole on the straight member 3-5 respectively and is then fixedly connected, one end of the tension spring 1 3-Y-4 is connected to the positioning pin 4-Y-4, and the other end of the tension spring 1 3-Y-4 is connected to the locking member 1-Y-4, and the front end of the locking member 1-Y-4 can support the lower plane of the pushed member 4-2. Figure 1 The figure shown by the double-dotted line in the lower left part shows the state of the sitting and lying dual-purpose chair when it is in the low position.

[0041] See Figure 4 and Figure 5 and Figure 6The second embodiment is composed of four parts, namely, a backrest component 1, a seat component 2, a chair frame component 3 and a locking assembly 4. The parts and structures of the backrest component 1 and the seat component 2 are the same as those of the first embodiment (there is no pushed member 4-2 on the seat component 2). The chair frame component 3 is mainly composed of four main support members 1-3, two upper frame cross members 2-3, two lower frame cross members 3-3, a secondary support member 4-3, two pins 5-3, a telescopic member 6-3 and a reinforcement member 7-3. The four main support members 1-3 are the left front main support member 1-1-3, the left rear main support member 2-1-3, the right front main support member 3-1-3 and the right rear main support member 4-1-3. The two upper frame cross members 2-3 are the left upper frame cross member 1-2-3 and the right upper frame cross member 2-2-3. The two lower frame cross members 3-3 are the left lower frame cross member 1-3-3 and the right lower frame cross member 2-3-3. The pin 5-3 is the left pin 1-5-3 ( Figure 5 upper dotted line) and right pin 2-5-3 ( Figure 5The front end of the left upper frame cross member 1-2-3 is slidably connected to the upper end of the left front main support member 1-1-3, the rear end of the left upper frame cross member 1-2-3 is slidably connected to the upper end of the left rear main support member 2-1-3 through the left pin shaft 1-5-3, the front end of the right upper frame cross member 2-2-3 is slidably connected to the upper end of the right front main support member 3-1-3, the rear end of the right upper frame cross member 2-2-3 is slidably connected to the right rear main support member 4-1-3 through the right pin shaft 2-5-3, the front end of the left lower frame cross member 1-3-3 is slidably connected to the lower part of the left front main support member 1-1-3, and the left lower frame cross member 1-3-3 is slidably connected to the upper end of the left rear main support member 2-1-3. The rear end of the right lower frame cross piece 2-3-3 is slidably connected to the lower part of the left rear main support 2-1-3, the front end of the right lower frame cross piece 2-3-3 is slidably connected to the lower part of the right front main support 3-1-3, the rear end of the right lower frame cross piece 2-3-3 is slidably connected to the lower part of the right rear main support 4-1-3, the left upper frame cross piece 1-2-3, the left lower frame cross piece 1-3-3, the left front main support 1-1-3 and the left rear main support 2-1-3 form a left parallelogram mechanism, and the right upper frame cross piece 2-2-3, the right lower frame cross piece 2-3-3, the right front main support 3-1-3 and the right rear main support 4-1-3 form a right parallelogram mechanism. The two ends of the reinforcing member 7-3 are respectively fixedly connected to the left front main support member 1-1-3 and the right front main support member 3-1-3, and the extended ends of the two ends of the reinforcing member 7-3 can be placed on the left lower frame cross member 1-3-3 and the right lower frame cross member 2-3-3 (the extended ends are equivalent to the positioning members 9-3 set on the left front main support member 1-1-3 and the right front main support member 3-1-3). The auxiliary support member 4-3 is fixedly connected to the rear of the telescopic member 6-3, and the telescopic member 6-3 is provided with two limiting members 10-3, and the limiting members 10-3 can contact the seat cross member 3-2. The telescopic member 6-3 is slidably connected to the space enclosed by the two seat side members 1-2, the seat member 2-2 and the two seat cross members 3-2 of the chair seat member 2. The left ends of the two seat cross members 3-2 and the left upper frame cross member 1-2-3 form a left motion guide pair, and the right ends of the two seat cross members 3-2 and the right upper frame cross member 2-2-3 form a right motion guide pair.

[0042] The locking assembly 4 is two combined locking assemblies II H-4 set on both sides of the reclining chair. The two combined locking assemblies IIH-4 are composed of a hook piece II 1-H-4, a fastening piece II 2-H-4 and a compression spring 3-H-4. After the fastening piece II 2-H-4 passes through the hole of the hook piece II 1-H-4, it is fixedly connected to the back part 1-1. The compression spring 3-H-4 is set between the heads of the hook piece II 1-H-4 and the fastening piece II2-H-4. The two ends of the hook piece II 1-H-4 are hooks. The hook at one end of the hook piece II 1-H-4 is hooked on the side of the back part 1-1, and the hook at the other end of the hook piece II 1-H-4 can hook the side of the rear seat cross piece 3-2. Figure 4 The figure shown by the double-dotted line in the lower left part shows the state of the sitting and lying dual-purpose chair when it is in the low position.

[0043] Through the above structure, the specific operations and actions of Example 1 and Example 2 of a telescopic sitting and lying chair are as follows.

[0044] 1. Main operations and linkages of Example 1.

[0045] When the two sets of movable locking components Y-4 are in a locked state, the front ends of the locking pieces 1-Y-4 of the two sets of movable locking components Y-4 press against the lower plane of the pushed component 4-2, and the chair is in a high sitting position. When sitting, the floor space occupied is minimal. Pulling apart the locking pieces 1-Y-4 of the two sets of movable locking components Y-4, the locking pieces 1-Y-4 disengage from the pushed component 4-2, and the two sets of movable locking components Y-4 are in a loosened state, so that the chair back component 1 rotates backwards - the two parallelogram mechanisms on the left and right rotate backwards. The motion characteristics of the mechanism make the seat component always in a position of front-back, up-and-down translation; the motion characteristics of the mechanism make the distance of the two upper frame cross members 2-3 moving backwards and downwards larger than the distance of the two lower frame cross members 3-3 moving backwards and downwards. The motion characteristics of the mechanism make the distance of the two upper frame cross members 2-3 moving backwards and downwards larger than the distance of the two lower frame cross members 3-3 moving backwards and downwards. As a result, 1) the seat component 2 connected to the upper frame cross member 2-3 motion guide pair is blocked by the left straight member 3-Z-5 and the right straight member 3-Y-5 by the pushed member 4-2 arranged thereon, so that its backward translation distance is less than the upper frame cross member 2-3, thereby: ① the seat component 2 moves forward relative to the upper frame cross member 2-3; ② most of the telescopic member 6-3 is pulled out of the seat component 2 by the shaft member 8-3 connected to the left rear main support member 2-1-3 and the right rear main support member 4-1-3 and through the auxiliary support member 4-3. The seat part 2 translates forward, and the telescopic part 6-3 translates backward, which greatly lengthens the length of the seat part 2 or the backrest part 1; 2) The distance that the upper frame cross member 2-3 translates downward is greater than the distance that the lower frame cross member 3-3 translates downward, and the left straight member 3-Z-5 and the right straight member 3-Y-5 are higher than the seat part 2-2, so that the armrest assembly 5 is in a suitable position when lying; 3) After the auxiliary support member 4-3 pulled out by the shaft member 8-3 lands on the ground, the chair occupies the smallest space and the largest ground, which is the best state for lying. Reverse rotation of the backrest part 1 - the left and right parallelogram mechanisms rotate forward. The above-mentioned upper frame cross member 2-3 and other parts move in the opposite direction. When the chair returns to the sitting position, the locking member 1-Y-4 connected to the left straight member 3-Z-5 and the right straight member 3-Y-5 again supports the lower plane of the pushed member 4-2, and the movable locking assembly Y-4 is automatically locked.

[0046] The grade of the reclining chair of this technology is improved. Only one operation is required to realize the linkage of the armrest assembly 5, the backrest component 1, the seat component 2, the auxiliary support component 4-3, the telescopic component 6-3 and the movable locking component Y-4, and the chair can be extended and retracted at one time to realize the change between sitting and lying, which is simple and convenient to operate; when sitting, the chair shrinks and occupies less ground; when lying, the chair extends, the seat component 2 or the backrest component 1 is lengthened, the contact surface between the chair and the ground is large, safe, but occupies less space; at the same time, the seat position is lowered, the feet are placed on the ground, and the adjustment mechanisms and parts such as the footrest device and the backrest component 1 are omitted, thereby reducing the manufacturing cost and simplifying the process.

[0047] 2. Main operations and linkages of Example 2.

[0048] When the two combined locking components II H-4 are in the locked state, the hook at one end of the hook component II 1-H-4 hooks the side of the back component 1-1, and the hook at the other end of the hook component II 1-H-4 hooks the side of the seat cross member 3-2. The chair is in a high sitting position. When sitting, the floor space occupied is minimal. The hooks of the two hook components II 1-H-4 hooked on the seat cross member 3-2 are released, and the two combined locking components II H-4 are opened, so that the chair back component 1 rotates backwards - the two parallelogram mechanisms on the left and right rotate backwards. The motion characteristics of the mechanism make the seat component always in a position of forward and backward, up and down translation; the motion characteristics of the mechanism make the distance of the two upper frame cross members 2-3 moving backward and downward greater than the distance of the two lower frame cross members 3-3 moving backward and downward. Thus, 1) the seat part 2 connected to the upper frame cross member 2-3 motion guide rail pair is pulled forward by hand; 2) the telescopic member 6-3 connected to the auxiliary support member 4-3 is pulled back by hand. Since the pulling-out position of the telescopic member 6-3 is not limited by the parallelogram mechanism, the auxiliary support member 4-3 and the telescopic member 6-3 can be set at the desired position within a certain range. The seat part 2 is translated forward and the telescopic member 6-3 is pulled back, which greatly lengthens the length of the seat part 2 or the backrest part 1; 3) after the pulled-out auxiliary support member 4-3 touches the ground, the chair occupies the smallest space and the largest ground, which is the best state for lying. Reverse rotation of the backrest part 1 - the left and right parallelogram mechanisms rotate forward. The above-mentioned upper frame cross member 2-3 and the like make reverse movements. When the chair returns to the sitting position, the hooks of the two combined locking components II H-4 hook the side of the seat cross member 3-2 again, and the combined locking component II H-4 is in the locked state again.

[0049] This simplified sitting and reclining chair has the largest contact surface with the ground and is safe; the seat is lowered, the feet are placed on the ground, the space occupied is minimal, and the footrest device, armrest assembly and many adjustment mechanisms and shaft parts are omitted. It is simpler and more compact than the second type of sitting and reclining chair, the process is simpler and the cost is lower; when changing from sitting to lying, the backrest component 1 and the combined locking component II H-4 are linked, and the operation is more convenient and simple. The biggest advantage of this type of sitting and reclining chair is that the positions of the auxiliary support member 4-3 and the telescopic member 6-3 are not limited by the parallelogram mechanism, and the range of selection is large.

[0050] To sum up, the present invention improves and upgrades the structure, use and operation of the "telescopic sitting and lying dual-purpose office and study chair" on the basis of more fully utilizing the motion characteristics of the parallelogram mechanism, the main mechanism of the "telescopic sitting and lying dual-purpose office and study chair" with application number 201721517914.0, simplifies the manufacturing process, facilitates modular, standardized and serialized development and production, reduces manufacturing costs, shortens the production cycle, and can further solve the two major problems of mass consumption and usage limitations that are difficult to achieve in current sitting and lying chairs.

Claims

1. A telescopic sitting and lying chair, which consists of a chair back component, a chair seat component, a chair frame component and a locking assembly, characterized in that: The chair back component (1) is composed of two back side components (1-1) and a back inner component (2-1), wherein the two back side components (1-1) are a left back side component (1-1-1) and a right back side component (2-1-1), and the back inner component (2-1) is connected to appropriate positions of the two back side components (1-1). The chair seat component (2) is composed of two seat side components (1-2), a seat component (2-2) and a seat cross component (3-2), wherein the two seat side components (1-2) are a left seat side component (1-1-2) and a right seat side component (2-1-2), wherein the left seat side component (1-1-2) is fixedly connected to the left side of the seat component (2-2), and the right seat side component (2-1-2) is fixedly connected to the left side of the seat component (2-2). On the right side of the seat frame (2-2), the left and right ends of the seat cross member (3-2) are respectively fixedly connected to the appropriate positions of the left seat side member (1-1-2) and the right seat side member (2-1-2), and the chair frame member (3) is composed of four main support members (1-3), two upper frame cross members (2-3), two lower frame cross members (3-3), a secondary support member (4-3), a pin shaft (5-3), a telescopic member (6-3) and a reinforcing member (7-3), the four main support members (1-3) are the left front main support member (1-1-3), the left rear main support member (2-1-3), the right front main support member (3-1-3) and the right rear main support member (4-1-3), the two upper frame cross members (2-3) are the left upper frame cross member (1 -2-3) and a right upper frame cross member (2-2-3), the two lower frame cross members (3-3) are a left lower frame cross member (1-3-3) and a right lower frame cross member (2-3-3), the pin shaft (5-3) is a left pin shaft (1-5-3) and a right pin shaft (2-5-3), the front end of the left upper frame cross member (1-2-3) and the upper end of the left front main support member (1-1-3) are movably connected, the rear end of the left upper frame cross member (1-2-3) is movably connected through the left pin shaft (1-5-3) and the appropriate position of the left rear main support member (2-1-3), the front end of the right upper frame cross member (2-2-3) and the upper end of the right front main support member (3-1-3) are movably connected The rear end of the right upper frame cross member (2-2-3) is movably connected to the appropriate position of the right rear main support member (4-1-3) through the right pin shaft (2-5-3), the front end of the left lower frame cross member (1-3-3) is movably connected to the lower position of the left front main support member (1-1-3), the rear end of the left lower frame cross member (1-3-3) is movably connected to the lower position of the left rear main support member (2-1-3), the front end of the right lower frame cross member (2-3-3) is movably connected to the lower position of the right front main support member (3-1-3), the rear end of the right lower frame cross member (2-3-3) is movably connected to the lower position of the right rear main support member (4-1-3),The left four-bar mechanism composed of the left upper frame cross member (1-2-3), the left lower frame cross member (1-3-3), the left front main support member (1-1-3) and the left rear main support member (2-1-3) is a left parallelogram mechanism; the right four-bar mechanism composed of the right upper frame cross member (2-2-3), the right lower frame cross member (2-3-3), the right front main support member (3-1-3) and the right rear main support member (4-1-3) is a right parallelogram mechanism; the auxiliary support member (4-3) is connected to the rear of the telescopic member (6-3); the telescopic member (6-3) is connected to the two seat side members (1- 2), the space enclosed by the seat member (2-2) and the seat cross member (3-2) is connected for movement, the two ends of the reinforcing member (7-3) are respectively fixed to the left front main support member (1-1-3) and the right front main support member (3-1-3), the left end of the seat cross member (3-2) of the seat member (2) and the left upper frame cross member (1-2-3) of the chair frame member (3) form a left motion guide pair, the right end of the seat cross member (3-2) of the seat member (2) and the right upper frame cross member (2-2-3) of the chair frame member (3) form a right motion guide pair, and the locking assembly (4) is arranged on a pair of parts that move relative to each other, A pushed member (4-2) is arranged at a suitable position of the seat component (2), and the pushed member (4-2) is divided into a left pushed member (1-4-2) and a right pushed member (2-4-2). The left pushed member (1-4-2) is arranged on the left side of the seat component (2), and the right pushed member (2-4-2) is arranged on the right side of the seat component (2). Two groups of armrest assemblies (5) are arranged between the backrest component (1) and the chair frame component (3). The armrest assemblies (5) are composed of a handlebar (1-5), a connecting member (2-5) and a connecting member (2-5). and a straight piece (3-5), the two groups of armrest assemblies (5) are divided into a left armrest assembly (Z-5) and a right armrest assembly (Y-5), the left armrest assembly (Z-5) is composed of a left handlebar (1-Z-5), a left connecting piece (2-Z-5) and a left straight piece (3-Z-5), the right armrest assembly (Y-5) is composed of a right handlebar (1-Y-5), a right connecting piece (2-Y-5) and a right straight piece (3-Y-5), one end of the left handlebar (1-Z-5) is movably connected to the left back side piece (1-1-1) of the chair back component (1) The other end of the left handrail (1-Z-5) is movably connected to one end of the left connecting member (2-Z-5), the other end of the left connecting member (2-Z-5) is movably connected to the upper end of the left straight member (3-Z-5), the lower end of the left straight member (3-Z-5) is fixedly connected to the left lower frame cross member (1-3-3) of the chair frame member (3) at a suitable position, one end of the right handrail (1-Y-5) is movably connected to the right back side member (2-1-1) of the chair back member (1), and the right handrail (1-Y-5) is movably connected to the right back side member (2-1-1) of the chair back member (1). The other end of (1-Y-5) is movably connected to one end of the right connecting member (2-Y-5), the other end of the right connecting member (2-Y-5) is movably connected to the upper end of the right straight member (3-Y-5), the lower end of the right straight member (3-Y-5) is fixedly connected to a suitable position of the right lower frame cross member (2-3-3) of the chair frame component (3), the left straight member (3-Z-5) is movably connected to the left pushed member (1-4-2), the right straight member (3-Y-5) is movably connected to the right pushed member (2-4-2), The locking assembly (4) is arranged on the pair of parts that move relative to each other in the following way: the pair of parts that move relative to each other are the straight piece (3-5) of the armrest assembly (5) and the pushed piece (4-2) of the seat component (2); the straight piece (3-5) and the pushed piece (4-2) are a movable connection pair; the locking assembly (4) arranged between the movable connection pair is a movable locking assembly (Y-4); the movable locking assembly (Y-4) is composed of a locking piece (1-Y-4), a positioning shell (2-Y-4), a tension spring I (3-Y-4) and a positioning pin (4-Y-4); the locking piece (1-Y-4) is provided with a groove, the front end of which is an inclined surface; the positioning shell (2-Y-4) The straight member (3-5) is fixedly connected at a suitable position of the positioning shell (2-Y-4), a hole is provided at a suitable position of the positioning shell (2-Y-4), the locking member (1-Y-4) and the positioning shell (2-Y-4) are movably connected, the positioning pin (4-Y-4) passes through the hole on the positioning shell (2-Y-4), the groove on the locking member (1-Y-4) and the hole on the straight member (3-5) respectively, and is then fixedly connected, one end of the tension spring I (3-Y-4) is connected to the positioning pin (4-Y-4), the other end of the tension spring I (3-Y-4) is connected to the locking member (1-Y-4), the front end of the locking member (1-Y-4) can support the lower plane of the pushed member (4-2), The locking assembly (4) is arranged on the pair of parts that can move relative to each other in the following way: the pair of parts that can move relative to each other are the back part (1-1) of the chair back part (1) and the seat cross part (3-2) of the chair seat part (2); the locking assembly (4) arranged between the back part (1-1) and the seat cross part (3-2) is a combined locking assembly I, and the combined locking assembly I is composed of an elastic hook part I and a fastening part I, one end of the hook part I is a bent hook, and the hook part I is fixedly connected to the appropriate position of the back part (1-1) by the fastening part I, and the bent hook of the hook part I can hook the side of the seat cross part (3-2).

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