Seat back lifting adjustment mechanism and seat

Abstract

The utility model discloses a lifting and adjusting mechanism for a seat back and a seat. The lifting and adjusting mechanism for the seat back comprises a movable seat connected to the back, a fixed seat fixedly connected to the seat, a locking member, and an elastic member; the movable seat is mounted on the fixed seat and can slide relative to the fixed seat in the height direction, and a plurality of positioning parts arranged in the height direction are arranged on the fixed seat; the locking member comprises a rotating part, an operating part, and a locking part, the rotating part is pivotally connected to the movable seat so that the locking member and the movable seat can be rotatably matched, the elastic member is used to apply elastic stress to the locking member so that the locking member is combined with one of the positioning parts to limit the freedom of the movable seat and the fixed seat to move up and down, and the operating part is used to drive the locking member to swing around the rotating part relative to the movable seat so that the locking part and the positioning part combined with the locking part are separated. The utility model can conveniently and quickly adjust the backrest to an appropriate height, and the backrest height adjustment can be completed with a single-handed operation.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a lifting and lowering adjustment mechanism for a seat back and a seat. Background Art

[0002] The traditional seat back adopts a fixed structure, which cannot be adjusted up and down as needed, and it is difficult to meet the personalized needs of users. In order to improve the above defects of traditional seats, some existing seats have adjustable backrests installed on the back of the seat, especially some student seats, which connect the backrest to the longitudinal beam inside the seat. When adjusting, the backrest is moved up and down along the longitudinal beam by turning the adjustment knob. Although this student seat can change the comfort of the seat by adjusting the height of the backrest, the operation process of turning the adjustment knob is relatively cumbersome during use, and it is not convenient to use. Utility Model Content

[0003] The utility model aims to provide a lifting and adjusting mechanism for a seat back and a seat, which can realize the height adjustment of the seat back conveniently and quickly.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The lifting and lowering adjustment mechanism of the seat back comprises a movable seat connected to the back, a fixed seat fixedly connected to the seat, a locking member, and an elastic member;

[0006] The movable seat is installed on the fixed seat and can slide relative to the fixed seat in the height direction. The fixed seat is provided with a plurality of positioning parts arranged in the height direction.

[0007] The locking member includes a rotating part, an operating part located on one side of the rotating part, and a locking part located on the other side of the rotating part. The rotating part is pivotally connected to the movable seat so that the locking member and the movable seat can be rotatably matched. The elastic member is used to apply elastic stress to the locking member so that the locking member is combined with one of the positioning parts to limit the freedom of the movable seat and the fixed seat to move up and down. The operating part is used to drive the locking member to swing around the rotating part relative to the movable seat so that the locking part and the positioning part combined with the locking part are disengaged.

[0008] Preferably, the positioning portion is a card slot arranged on the fixing seat, and the locking portion is provided with a buckle that matches the shape of the card slot and can be embedded in the card slot.

[0009] Preferably, the fixed seat includes a mating surface facing the movable seat, the slot is arranged on the mating surface, the slot includes a bottom wall extending from the mating surface in a direction away from the movable seat, and a guide wall extending upward from a side of the bottom wall away from the movable seat to the mating surface at an angle; the bottom wall is perpendicular to the height direction, or the bottom wall gradually tilts downward from a side close to the movable seat to a side away from the movable seat.

[0010] Preferably, a slider is fixedly connected to the movable seat, a guide groove is formed on both sides of the slider, the openings of the two guide grooves are arranged opposite to each other, a guide rib extending along the height direction is respectively arranged on both sides of the fixed seat, the two guide ribs are respectively slidably embedded in the two guide grooves, a lower limit end is arranged at the bottom of the guide rib, and an upper limit end located at the top of the guide rib is arranged on the fixed seat or the seat, and the slider moves between the lower limit end and the upper limit end along the extension direction of the guide rib.

[0011] Preferably, the slider is fixedly connected to the movable seat in a detachable manner, and the locking member and the elastic member are both located in an installation space surrounded by the slider and the movable seat.

[0012] Preferably, the rotating part includes two shaft heads protruding from both sides of the locking piece respectively, and an shaft hole is formed between the movable seat and the slider. The two shaft heads are connected in the shaft hole so that the locking piece and the movable seat can be rotatably matched. The movable seat is provided with a first avoidance hole, and the operating part of the locking piece is passed through the first avoidance hole to protrude from the side of the movable seat away from the slider. The first avoidance hole is configured to enable the operating part to move up and down therein; the slider is provided with a second avoidance hole, and the locking part extends toward the fixed seat after passing through the second avoidance hole, and the second avoidance hole is configured to enable the locking part to move up and down therein.

[0013] Preferably, a limiting wall is formed on the upper edge of the second avoidance hole, and the elastic member is a spring arranged between the movable seat and the locking part, and the spring is used to apply elastic stress to the locking part so that the locking part presses against the limiting wall and protrudes from a side of the slider away from the movable seat.

[0014] Preferably, a boss is formed on one side of the locking portion close to the movable seat, a recess is provided on one side of the movable seat facing the slider, one end of the spring is sleeved on the boss, and the other end is embedded in the recess.

[0015] Preferably, two retaining walls are provided on the movable seat, and the two retaining walls are respectively located on both sides of the locking member to limit the freedom of axial movement of the locking member on the shaft head. A groove is provided on each of the two retaining walls, and the opening of the groove faces the slider and is covered by the slider to form an axis hole.

[0016] The invention is characterized in that it comprises the above-mentioned lifting and lowering adjustment mechanism for the seat back.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] When adjusting the height of the backrest, the user only needs to toggle the operating part of the locking member so that the locking member no longer limits the freedom of relative movement of the movable seat and the fixed seat, and then lightly lift or press the movable seat or the backrest to conveniently and quickly adjust the backrest to an appropriate height. The user only needs to operate with one hand to complete the adjustment of the backrest height, which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model and describes a usage state of the utility model;

[0021] Figure 3 for Figure 2 Magnified view at A in the middle;

[0022] Figure 4 for Figure 1 Schematic diagram of the assembly of the middle fixed seat and the slider;

[0023] Figure 5 for Figure 1 Structural schematic diagram of the middle movable seat;

[0024] Figure 6 1 is a schematic diagram of the structure of the locking member;

[0025] Figure 7 This is another schematic diagram of the utility model in use state.

[0026] Among them: 10, movable seat; 11, retaining wall; 12, groove; 13, first avoidance hole; 14, concave position; 20, fixed seat; 201, matching surface; 202, guide rib; 203, lower limit end; 21, slot; 211, bottom wall; 212, guide wall; 30, slider; 31, guide groove; 32, second avoidance hole; 40, locking piece; 41, shaft head; 42, operating part; 43, locking part; 431, buckle; 44, boss; 50, spring; 80, backrest; 90, seat. DETAILED DESCRIPTION

[0027] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] like Figure 1 , 2 , 3, 4, 5, 6, and 7 show a lifting and adjusting mechanism for a seat backrest of the utility model, which includes a movable seat 10 connected to the backrest 80, a fixed seat 20 fixedly connected to the seat 90, a locking member 40 and a spring 50. The movable seat 10 and the fixed seat 20 are slidably matched so that the movable seat 10 can move up and down relative to the fixed seat 20 along the height direction. A plurality of card slots 21 are provided on the fixed seat 20, and the plurality of card slots 21 are arranged along the height direction. The locking member 40 is installed on the movable seat 10, and includes a rotating part, an operating part 42 located on one side of the rotating part, and a locking part 43 located on the other side of the rotating part. The rotating part is pivotally connected to the movable seat 10 so that the locking member 40 and the movable seat 10 can be rotatably matched. The spring 50 is used to apply an elastic stress to the locking member 40 so that the locking part 43 on the locking member 40 always has a position facing the fixed seat 20. The locking member 40 is then moved in a direction away from the fixed seat 20 so that the buckle 431 on the locking member 43 is disengaged from the slot 21, and the locking member 43 and the slot 21 are no longer restricted in the upward and downward movement of the movable seat 10 relative to the fixed seat 20.

[0031] The above-mentioned slot 21 is used as a positioning portion to combine with the locking portion 43 on the locking member 40. In other embodiments, the positioning portion located on the fixed seat 20 can also be a protrusion arranged on the fixed seat 20. Correspondingly, a recessed portion can be arranged on the locking portion 43 to replace the above-mentioned buckle 431. When locking the movable seat 10 and the fixed seat 20, the recessed portion on the locking portion 43 is embedded in one of the protrusions on the fixed seat 20, so that the locking portion 43 is combined with one of the protrusions.

[0032] The spring 50 mentioned above can also be replaced by other elastic members such as elastic rubber blocks, as long as elastic stress can be applied to the locking member 40 all the time so that the locking portion 43 on the locking member 40 always maintains a tendency to swing toward the fixing seat 20.

[0033] See also Figure 2 When the utility model is in use, the elastic stress of the elastic member keeps the locking portion 43 on the locking member 40 engaged with one of the positioning portions on the fixed seat 20, thereby locking the movable seat 10 and the fixed seat 20, so that the backrest 80 and the seat 90 remain relatively fixed, ensuring the normal use of the seat 90. Figure 7 As shown, when the height of the seat 90 needs to be adjusted, the operating part 42 is toggled, and the locking member 40 is driven to swing by the operating part 42, so that the locking part 43 on the locking member 40 is separated from the positioning part combined therewith, and the movable seat 10 can be moved up and down at this time, and the backrest 80 can be adjusted to a suitable height, and then the external force on the operating part 42 is released, and the locking member 40 is pushed by the elastic stress of the elastic member, so that the locking part 43 is combined with the positioning part of the corresponding height, and the movable seat 10 is locked with the fixed seat 20. When adjusting the height of the backrest 80 of the utility model, it is only necessary to toggle the operating part 42 of the locking member 40 so that the locking member 40 no longer limits the freedom of relative movement of the movable seat 10 and the fixed seat 20, and then lightly lift or press the movable seat 10 or the backrest 80, so that the backrest 80 can be conveniently and quickly adjusted to a suitable height, and the user only needs to operate with one hand to complete the adjustment of the height of the backrest 80, saving time and effort.

[0034] In a preferred embodiment, the fixed seat 20 of the utility model includes a mating surface 201 facing the movable seat 10, and the mating surface 201 extends along the height direction. The above-mentioned multiple card slots 21 are arranged on the mating surface 201, and the card slot 21 includes a bottom wall 211 and a guide wall 212, wherein the bottom wall 211 extends from the mating surface 201 in a direction away from the movable seat 10, and the bottom wall 211 is arranged perpendicular to the height direction, and the guide wall 212 extends upward from the side of the bottom wall 211 away from the movable seat 10 to the mating surface 201 at an angle, so that the card slot 21 forms a structure with a triangular cross-section, and the buckle 431 on the locking portion 43 is consistent with the shape of the card slot 21. After the buckle 431 is placed in the slot 21, it is supported on the bottom surface of the buckle 431 by the bottom wall 211, thereby limiting the freedom of the movable seat 10 to move downward relative to the fixed seat 20. When the buckle 431 is in the slot 21, the movable seat 10 is lifted upward, and the movable seat 10 drives the locking member 40 to move upward. The inclined guide wall 212 can push the buckle 431 toward the movable seat 10, so that the buckle 431 is disengaged from the slot 21. In other words, when the backrest 80 needs to be adjusted upward, the movable seat 10 and the backrest 80 can be directly lifted upward without moving the operating part 42, thus further improving the convenience of adjusting the backrest 80. When the height of the backrest 80 needs to be adjusted downward, the operating part 42 is moved to disengage the buckle 431 from the slot 21, and then the movable seat 10 is moved downward. In order to make the buckle 431 and the slot 21 cooperate better to limit the freedom of the movable seat 10 to move downward, the above-mentioned bottom wall 211 can be set to an inclined state. Specifically, the bottom wall 211 gradually tilts downward from the side close to the movable seat 10 to the side away from the movable seat 10. When the buckle 431 is placed in the slot 21, the inclined bottom wall 211 can better prevent the buckle 431 from detaching from the slot 21, so that the combination of the locking portion 43 and the slot 21 is more stable.

[0035] A slider 30 is fixedly connected to the movable seat 10, and a guide groove 31 is formed on both sides of the slider 30, and the openings of the two guide grooves 31 are arranged opposite to each other. A guide rib 202 extending along the height direction is respectively arranged on both sides of the fixed seat 20, and the two guide ribs 202 are respectively slidably embedded in the two guide grooves 31. A lower limit end 203 is arranged at the bottom of the guide rib 202, and an upper limit end located at the top of the guide rib 202 is arranged on the top of the fixed seat 20 or the seat 90. The upper limit end and the lower limit end 203 are used to limit the up and down movement of the slider 30, so that the slider 30 slides between the upper limit end and the lower limit end 203 in the extension direction of the guide rib 202 to prevent the movable seat 10 from being separated from the fixed seat 20 when sliding. The slider 30 can be fixedly connected to the movable seat 10 in a detachable manner, and an installation space is formed between the slider 30 and the movable seat 10. The locking member 40 and the spring 50 are both installed in the installation space. The slider 30 and the movable seat 10 are detachably fixed by screws or other means to facilitate the installation of the locking member 40 and the spring 50 in the installation space.

[0036] The rotating part on the locking member 40 is two shaft heads 41 protruding from both sides of the locking member 40, and an axial hole is formed between the movable seat 10 and the slider 30. The two shaft heads 41 are respectively connected to the axial hole so that the locking member 40 and the movable seat 10 can be rotatably matched. The movable seat 10 is provided with a first avoidance hole 13. After the operating part 42 of the locking member 40 passes through the first avoidance hole 13, it protrudes on the side of the movable seat 10 away from the slider 30, so that the operating part 42 can be toggled on the side of the movable seat 10 away from the slider 30. The operating portion 42 is generally plate-shaped, and the first avoidance hole 13 is configured to have an appropriate vertical width. After the operating portion 42 is placed in the first avoidance hole 13, when the operating portion 42 is moved from the outside of the operating portion 42, the operating portion 42 can move up and down inside the first avoidance hole 13, that is, the first avoidance hole 13 is configured to enable the operating portion 42 to move up and down inside it, and the range of up and down movement is sufficient to allow the locking member 40 to swing a sufficient angle to ensure that the locking portion 43 can be separated from the slot 21. The slider 30 is provided with a second avoidance hole 32. After the locking portion 43 passes through the second avoidance hole 32, at least the buckle 431 on the locking portion 43 is exposed on the side of the slider 30 facing the fixed seat 20, so that the exposed buckle 431 can be embedded in the slot 21 of the fixed seat 20. The second avoidance hole 32 has a sufficient vertical width, so that the second avoidance hole 32 is configured to enable the locking portion 43 to move up and down inside it. A limiting wall is formed on the upper edge of the second avoidance hole 32, and two ends of the spring 50 respectively abut against the movable seat 10 and the locking portion 43 of the locking member 40. The spring 50 is used to apply elastic stress to the locking portion 43. Under the action of the elastic stress, the locking portion 43 always maintains a state of abutting against the limiting wall, so that the buckle 431 on the locking portion 43 can completely protrude from the side of the slider 30 away from the movable seat 10, thereby ensuring that the locking portion 43 can be more stably combined with the slot 21.

[0037] In order to prevent the spring 50 from detaching from the locking member 40 and the movable seat 10, a boss 44 is formed on the side of the locking portion 43 close to the movable seat 10, and a recess 14 is provided on the side surface of the movable seat 10 facing the slider 30. One end of the spring 50 is sleeved on the boss 44 and the other end is embedded in the recess 14.

[0038] Two retaining walls 11 are arranged on the movable seat 10, and the two retaining walls 11 are respectively located on both sides of the locking member 40, so as to limit the freedom of axial movement of the locking member 40 on the shaft head 41, that is, to limit the freedom of left and right movement of the locking member 40, so as to prevent the locking member 40 from moving left and right when rotating around the shaft head 41. A groove 12 is arranged on each of the two retaining walls 11, and the opening of the groove 12 faces the slider 30. During assembly, the locking member 40 is placed between the two retaining walls 11, so that the operating part 42 passes through the first avoidance hole 13, and the two shaft heads 41 are respectively embedded in the two grooves 12, and the spring 50 is placed between the locking part 43 and the movable seat 10, and then the slider 30 is fixedly connected to the movable seat 10 by screws, and the opening of the groove 12 is covered by the slider 30, and the opening of the groove 12 is covered by the slider 30 to form an axial hole.

[0039] The seat of the utility model includes the lifting and lowering adjustment mechanism of the seat back, and other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0040] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. The lifting and adjusting mechanism of the seat back is characterized in that: It includes a movable seat connected to the backrest, a fixed seat fixedly connected to the seat, a locking member, and an elastic member; The movable seat is installed on the fixed seat and can slide relative to the fixed seat in the height direction. The fixed seat is provided with a plurality of positioning parts arranged in the height direction. The locking member includes a rotating part, an operating part located on one side of the rotating part, and a locking part located on the other side of the rotating part. The rotating part is pivotally connected to the movable seat so that the locking member and the movable seat can be rotatably matched. The elastic member is used to apply elastic stress to the locking member so that the locking member is combined with one of the positioning parts to limit the freedom of the movable seat and the fixed seat to move up and down. The operating part is used to drive the locking member to swing around the rotating part relative to the movable seat so that the locking part and the positioning part combined with the locking part are disengaged.

2. The seat back lifting and adjusting mechanism according to claim 1, characterized in that: The positioning part is a card slot arranged on the fixing seat, and the locking part is provided with a buckle which matches the shape of the card slot and can be embedded in the card slot.

3. The seat back lifting and adjusting mechanism according to claim 2, characterized in that: The fixed seat includes a mating surface facing the movable seat, and the slot is arranged on the mating surface. The slot includes a bottom wall extending from the mating surface toward a direction away from the movable seat, and a guide wall extending upward from a side of the bottom wall away from the movable seat to the mating surface at an angle; the bottom wall is perpendicular to the height direction, or the bottom wall gradually tilts downward from a side close to the movable seat to a side away from the movable seat.

4. The seat back lifting and adjusting mechanism according to claim 1, characterized in that: A slider is fixedly connected to the movable seat, and a guide groove is formed on both sides of the slider. The openings of the two guide grooves are arranged opposite to each other. A guide rib extending along the height direction is respectively arranged on both sides of the fixed seat. The two guide ribs are respectively slidably embedded in the two guide grooves. A lower limit end is arranged at the bottom of the guide rib, and an upper limit end located at the top of the guide rib is arranged on the fixed seat or the seat. The slider moves between the lower limit end and the upper limit end along the extension direction of the guide rib.

5. The seat back lifting and adjusting mechanism according to claim 4, characterized in that: The slider is fixedly connected to the movable seat in a detachable manner, and the locking member and the elastic member are both located in an installation space surrounded by the slider and the movable seat.

6. The seat back lifting and adjusting mechanism according to claim 5, characterized in that: The rotating part includes two shaft heads protruding from both sides of the locking piece respectively, and an shaft hole is formed between the movable seat and the slider. The two shaft heads are connected in the shaft hole so that the locking piece and the movable seat can be rotatably matched. The movable seat is provided with a first avoidance hole, and the operating part of the locking piece is passed through the first avoidance hole to protrude from the side of the movable seat away from the slider. The first avoidance hole is configured to enable the operating part to move up and down therein; the slider is provided with a second avoidance hole, and the locking part extends toward the fixed seat after passing through the second avoidance hole, and the second avoidance hole is configured to enable the locking part to move up and down therein.

7. The seat back lifting and adjusting mechanism according to claim 6, characterized in that: A limiting wall is formed on the upper edge of the second avoidance hole. The elastic member is a spring arranged between the movable seat and the locking part. The spring is used to apply elastic stress to the locking part so that the locking part abuts against the limiting wall and protrudes from a side of the slider away from the movable seat.

8. The seat back lifting and adjusting mechanism according to claim 7, characterized in that: A convex platform is formed on one side of the locking part close to the movable seat, a concave position is arranged on one side surface of the movable seat facing the slider, one end of the spring is sleeved on the convex platform, and the other end is embedded in the concave position.

9. The seat back lifting and adjusting mechanism according to claim 6, characterized in that: Two retaining walls are arranged on the movable seat, and the two retaining walls are respectively located on both sides of the locking member to limit the freedom of the locking member to move axially on the shaft head. A groove is arranged on each of the two retaining walls, and the opening of the groove faces the slider and is covered by the slider to form an axial hole.

10. A seat, characterized in that: A lifting and adjusting mechanism for a seat back comprising the seat back according to any one of claims 1 to 9.

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