A seat locking control mechanism

Abstract

This utility model discloses a seat locking control mechanism, including a locking hole and a control component for being set on the front or rear linkage. The control component includes a base for being set on the armrest, a locking member movably connected to the base, and a linkage seat. A linkage structure is provided between the linkage seat and the locking member. A transmission member is connected to the linkage seat, and the transmission member is connected to a control switch. The linkage structure is configured such that when an external force acts on the control switch and drives the linkage seat to move through the transmission member, the linkage seat and the locking member engage or disengage from the corresponding locking hole, so that the front or rear linkage switches between a locked state and a swinging state. This allows the user to control the swinging or locking of the front and rear linkages simply by using the control switch, thereby locking and unlocking the backrest and seat, meeting the user's needs and enriching the seat's functionality.

Description

Technical Field

[0001] This utility model relates to the field of seats, and in particular to a seat locking control mechanism. Background Technology

[0002] Most office chairs or ergonomic chairs are equipped with a backrest that can rotate forward and backward and tilt, allowing the backrest to switch between an upright and reclined position to provide support for the back of the user who is working upright or resting in a reclining position. However, when the backrest is supported and rotated backward, the center of rotation of the user's back is higher than that of the backrest, which can create a "rubbing" sensation on the back. At the same time, a backrest that is tilted too far back can also cause the center of gravity of the chair to shift backward, making the chair easy to tip over. This is not ergonomic and does not meet the user's needs.

[0003] The applicant designed a chair with a linked backrest and seat to improve the stability of the chair and reduce the "rubbing sensation" of the backrest against the back. The chair includes a base, armrests on both sides of the base, and a seat between the two armrests. Linkage components are connected to the left and right sides of the seat. The linkage components are hinged to the corresponding armrests. Front and rear linkages are hinged between the side of the seat and the corresponding armrest, forming a parallelogram linkage mechanism between the armrests, the front and rear linkages, and the seat. When the backrest rotates backward, the linkage components can cause the parallelogram linkage mechanism to deform, causing the seat to move back and forth, reducing the "rubbing sensation" and improving the stability of the chair.

[0004] However, if users do not want the seat and back to be linked, but only want the upright or tilted chair back to provide stable support for their backs so that they can work or rest, then a seat locking control mechanism is needed. According to the user's own needs, the seat locking control mechanism can lock the chair back and seat and keep them in a predetermined position, or it can unlock the chair back and seat to switch to a linked state, thereby expanding the applicable range of the chair. Summary of the Invention

[0005] This utility model provides a seat locking control mechanism. By setting a locking hole on the front or rear linkage and setting a control component that can be installed on the armrest, the user can control the swing or locking of the front and rear linkages simply by controlling the switch, so as to lock and unlock the backrest and seat, meet the user's needs, and make the seat more functional.

[0006] The technical solution of this utility model is implemented as follows: A seat locking control mechanism includes a locking hole and a control assembly for mounting on a front or rear linkage. The control assembly includes a base mounted on an armrest, a locking member movably connected to the base, and a linkage seat. A linkage structure is provided between the linkage seat and the locking member. A transmission member is connected to the linkage seat and connected to a control switch. The linkage structure is configured such that when an external force acts on the control switch and drives the linkage seat to move via the transmission member, the linkage seat engages or disengages the locking member in the corresponding locking hole, thereby switching the front or rear linkage between a locked state and a swinging state.

[0007] Preferably, there are multiple locking holes, which are spaced apart circumferentially on the front or rear connecting rod, so that the front and rear connecting rods can be locked or unlocked at multiple angular positions.

[0008] Preferably, the engaging component is slidably connected to the base to be close to or away from the engaging hole, and the linkage seat is slidably connected to the base with the sliding direction of the linkage seat perpendicular to the sliding direction of the engaging component; the linkage structure is a linkage inclined surface provided on one of the linkage seat and the engaging component.

[0009] Preferably, an elastic reset element is provided between the engaging component and the base. When an external force acts to control the switch and drive the linkage seat to move, the engaging component moves and squeezes the elastic reset element to produce elastic deformation. When the external force is removed, the elastic reset element resets and the engaging component returns to its initial position.

[0010] Preferably, when the elastic reset member is reset, the engaging member presses the linkage seat through the linkage inclined surface, thereby resetting the linkage seat.

[0011] Preferably, the elastic reset element is a compression spring disposed between the base and the engaging element.

[0012] Preferably, the base is provided with a clearance window corresponding to the card hole; the engaging component is provided with a locking tooth, and when the engaging component moves, the locking tooth can engage or disengage from the corresponding card hole through the clearance window.

[0013] Preferably, the transmission component is a pull wire connecting the control switch and the linkage base.

[0014] Preferably, the transmission component includes a first transmission rod connected to the linkage seat and a second transmission rod connected to the control switch. The first transmission rod is hinged to the handrail, and the first transmission rod and the second transmission rod are hinged to each other.

[0015] Preferably, the linkage seat is slidably connected to the base; the engaging member is hinged to the base via a rotating shaft, and the linkage structure is a pushing surface provided on the linkage seat for pushing the engaging member to rotate.

[0016] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention features locking holes on the front or rear linkage and a control component that can be mounted on the armrest to control the swinging and locking of the linkage. This allows the chair back and seat to be locked or unlocked according to the user's needs. In actual use, the user can lock the chair back in an upright position using a control switch to provide normal back support, or unlock the chair back to allow the seat and back to move back and forth, further expanding the functionality and range of the chair and meeting the user's needs. Attached Figure Description

[0017] Figure 1 This is a diagram showing a seat with a cushion installed. Figure 2 Enlarged view of the location of the clearance; Figure 3 This is an enlarged view of the location of the strip-shaped clearance groove; Figure 4 A schematic diagram showing the base of the control components fixed inside the armrest cover; Figure 5 A schematic diagram of the linkage assembly and linkage components, with the armrest cover removed; Figure 6 This is a side sectional view of the chair with the backrest upright. Figure 7 A simplified diagram illustrating the forward movement of the seat when the backrest rotates backward; Figure 8 An exploded view of the seat locking control mechanism; Figure 9 From another angle, the explosion of the seat locking control mechanism; Figure 10a A cross-sectional view of the seat locking control mechanism when the locking element is engaged in the locking hole; Figure 10b A cross-sectional view of the seat locking control mechanism when the engaging component disengages from the locking hole; Figure 11 This is a side view of another type of transmission component; Figure 12 This is a cross-sectional view of the seat locking control mechanism in Embodiment 2; The attached figures are labeled as follows: 1-base, 2-seat, 21-connecting plate, 3-armrest, 31-armrest plate, 32-armrest cover, 33-connecting ear, 34-mounting groove, 321-avoidance opening, 322-strip avoidance groove, 4-backrest, 5-linkage component, 6-front linkage, 7-rear linkage, 71-guide groove, 72-extension, 8-locking hole, 9-base, 91-locking component, 911-locking tooth, 92-elastic reset component, 93-linkage seat, 931-linkage structure, 94-pull cable, 941-first transmission rod, 942-second transmission rod, 95-control switch, 96-guide channel, 97-avoidance window, 98-slide groove, a-first upper hinge point, b-first lower hinge point, c-second upper hinge point, d-second lower hinge point. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0020] This utility model has several specific embodiments, and the specific implementation methods are as follows: Example 1: As Figure 1-11As shown, this embodiment provides an ergonomic chair, including a base 1 and a backrest 4. Armrests 3 are provided on the left and right sides of the base 1, each armrest 3 being fixedly connected to the base 1. The base 1 is a rigid plate-like structure used for insertion with a lifting gas spring. A seat 2 is provided between the two armrests 3, positioned above the base 1. A translation linkage mechanism is provided on the left and right sides of the seat 2 and the backrest 4. The translation linkage mechanism includes linkage members 5 on the left and right sides of the backrest 4 and a connecting rod assembly between each armrest 3 and the seat 2. The connecting rod assembly includes a front connecting rod 6 and a rear connecting rod 7. The upper and lower ends of the front connecting rod 6 are hinged to the armrest 3 and the seat 2 respectively, forming a first upper hinge point a and a first lower hinge point b spaced apart vertically. The upper and lower ends of the rear connecting rod 7 are hinged to the armrest 3 and the seat 2 respectively, forming a second upper hinge point c and a second lower hinge point d spaced apart vertically. The armrests 3, the seat 2, and the connecting rod assembly together constitute a parallelogram connecting rod. The mechanism, the parallelogram, refers to the fact that the distance between the first upper hinge point a and the first lower hinge point b is equal to the distance between the second upper hinge point c and the second lower hinge point d. At the same time, the distance between the first upper hinge point a and the second upper hinge point c, and the distance between the first upper hinge point b and the second lower hinge point d are also equal, so that the lines connecting the four hinge points form a parallelogram with opposite sides that are parallel and equal. It does not mean that the outer length of the seat 2 and the armrest 3 must be the same. Each linkage 5 is hinged to the corresponding armrest 3. Either the front link 6 or the rear link 7 is configured as a linkage rod. One of the linkage 5 and the linkage rod is provided with a guide pin 51, and the other of the linkage 5 and the linkage rod is provided with a guide groove 71 extending in a non-front-back direction. The guide pin 51 is slidably connected in the guide groove 71 so that the swing trajectory of the linkage 5 matches the swing trajectory of the linkage rod, so as to establish a smooth linkage mechanism between the seat 2 and the backrest 4. like Figure 6-7 As shown, under the action of external force, the backrest 4 and the linkage 5 rotate back and forth. At this time, the guide pin 51 slides in the guide groove 71 and causes the parallelogram linkage mechanism to deform. At this time, the armrest 3 remains stationary, while the front linkage 6 and the rear linkage 7 swing back and forth to drive the seat 2 to move back and forth, so that the backrest 4 provides adaptive support for the back, and the seat 2 will not exert upward pressure on the thighs, thus improving the comfort of the seat.

[0021] Furthermore, in the structure illustrated in this embodiment, the rear connecting rod 7 is preferably configured as a linkage rod, wherein the guide groove 71 extends vertically or obliquely along the longitudinal direction and is disposed on the rear connecting rod 7. The guide groove 71 can be a straight groove or an arc groove; the guide pin 51 is disposed on the linkage member 5; while linking the parallelogram linkage mechanism, the linkage member 5 does not need to extend forward and be provided with a structure of guide groove 71 and guide pin 51 between it and the front connecting rod 6, so that the linkage member 5 does not need to be designed to be too long, thereby optimizing the cost and structural layout of the seat while realizing the linkage between the seat 2 and the backrest 4.

[0022] Furthermore, to facilitate hinge connection with the front link 6 and the rear link 7, the chair seat 2 includes a seat support and connecting assemblies disposed on the left and right sides of the seat support. The connecting assemblies include two connecting plates 21 spaced apart front to back. Each connecting plate 21 includes a horizontal plate for fixing to the seat support and a vertical plate for connecting to the front link 6 or the rear link 7. The two connecting plates 21 spaced apart front to back are respectively hinged to the lower end of the front link 6 and the lower end of the rear link 7 to avoid directly threading a pivot on the seat support.

[0023] Furthermore, to allow the backrest 4 and seat 2 of the seat to return to their original positions, the seat also includes an elastic element 61, and at least one armrest 3 is provided with the elastic element 61. The elastic element 61 is configured to provide a restoring force to the backrest 4 through its own elastic deformation when the backrest 4 rotates backward. There are many ways to configure the elastic element 61; for example, in the structure shown in this embodiment, one end of the elastic element 61 acts on the armrest 3, and the other end acts on the front link 6 or the rear link 7. The elastic element 61 can be a mechanical spring or a gas spring; for example... Figure 4 As shown in the figure, the elastic element 61 in this embodiment is a tension spring disposed between the front link 6 and the armrest 3; or, the elastic element 61 may also be a compression spring disposed between the rear link 7 and the armrest 3 (not shown); or, the elastic element 61 may be a torsion spring disposed between the linkage 5 and the armrest 3 (not shown); all of the above elastic elements 61 generate elastic deformation when the backrest 4 rotates backward, and release the elastic force when the back of the seated person leaves the backrest 4, so that the backrest 4 and the seat 2 return to the initial position.

[0024] Furthermore, in this embodiment, the armrest 3 has a shell-like structure, including an armrest plate 31 and an armrest cover 32. The upper ends of the front connecting rod 6 and the rear connecting rod 7 are both hinged to the armrest plate 31. The armrest cover 32 is connected to the side of the armrest plate 31 and seals the connecting rod assembly between the armrest plate 31 and the armrest cover 32 to prevent the connecting rod assembly from being completely exposed and affecting the appearance of the seat. Specifically, the armrest cover 32 is located inside the armrest plate 31, and the rear end of the armrest cover 32 is provided with a connecting lug 33 for corresponding linkage. The component 5 is hinged to the connecting ear 33; at the same time, in order to facilitate the insertion of the linkage component 5 into the shell-shaped armrest 3 and its smooth rotation, a wide clearance opening 321 is also provided through the rear end of the armrest cover 32; in addition, the lower ends of the front link 6 and the rear link 7 are both hinged to the seat 2 by pins. Therefore, in order to facilitate the hinge of the link assembly and the seat 2, a strip-shaped clearance groove 322 is also provided through the inner side of the armrest cover 32. The strip-shaped clearance groove 322 is mainly to avoid the pin and prevent the pin from interfering with the armrest cover 32.

[0025] Furthermore, to broaden the function and scope of use of the seat, this embodiment also includes a seat locking control mechanism. This mechanism can control the backrest 4 and seat 2 to switch between a locked state and an active state, allowing the occupant to control the seat 2 and backrest 4 to move or lock according to their needs. At least one armrest 3 is equipped with the aforementioned seat locking control mechanism, which includes control components and a multi-position engagement structure, such as... Figure 8-9 As shown, the multi-position locking structure includes locking holes 8 spaced circumferentially on the front link 6 or the rear link 7, and locking members 91 corresponding to the positions of the locking holes 8. The locking holes 8 can be single, or preferably multiple arranged circumferentially, to allow the backrest 4 and seat 2 to be locked or unlocked at different positions. In this embodiment, only the structure with locking holes 8 on the rear link 7 is shown. To facilitate the installation of multiple locking holes 8 without affecting the structural strength of the rear link 7, an extension 72 is fixedly connected to the rear link 7, and some or all of the locking holes 8 are located on the extension 72. The control component includes a base 9 mounted on the armrest 3 and a linkage seat 93 movably connected to the base 9. The locking members 91 are movably connected to the base 9. A connection is provided between the linkage seat 93 and the locking members. There is a linkage structure 931, and a transmission component is connected to the linkage seat 93. The transmission component can be a mechanical linkage or a flexible pull cable 94. Considering cost and seat space layout, the transmission component is preferably a pull cable 94 in this embodiment. The pull cable 94 is connected to a control switch 95 exposed on the armrest 3. The outer side of the armrest plate 31 is provided with a recessed mounting groove 34. The control switch 95 is usually a rotary wrench set in the mounting groove 34 or a sliding switch slidably connected to the armrest plate 31. The linkage structure 931 is configured such that when an external force acts on the control switch 95 and the pull cable 94 is tensioned, the linkage seat 93 moves and drives the engaging component 91 to engage or disengage from the corresponding locking hole 8. In this embodiment, the engaging component 91 is explained in the initial state of disengaging from the locking hole 8.

[0026] Specifically, the base 9 and the armrest cover 32 are fixedly connected by screws. The base 9 is provided with a groove 98 extending toward the latch hole 8. The engaging member 91 is slidably connected in the groove 98 to move closer to or away from the latch hole 8. The engaging member 91 is provided with a locking tooth 911. The base 8 is provided with a clearance window 97 corresponding to the position of the latch hole 8 to allow the locking tooth 911 to pass through and engage or disengage from the latch hole 8. The clearance window 97 ensures that the engaging member 91 is completely contained within the groove 98 when not engaged with the latch hole 8, further reducing the volume occupied by the control components. The 9 is also provided with a guide channel 96 that communicates with the slide groove 81 and extends in a direction perpendicular to the extension direction of the slide groove 98. The linkage seat 93 is a slider that is slidably connected in the guide channel 96, so that the sliding direction of the linkage seat 93 is perpendicular to the sliding direction of the locking member 91. The linkage structure 931 is a linkage inclined surface provided on one of the linkage seat 93 and the locking member 91. In the initial state, the locking member 3 is disengaged from the locking hole 8. When an external force acts to control the switch 95 and tightens the pull wire 94, the linkage inclined surface squeezes the locking member 91 and the locking teeth 911 are engaged in the corresponding locking hole 8.

[0027] Furthermore, such as Figure 11 As shown, this embodiment provides another mechanical linkage-type transmission structure. The transmission component includes a first transmission rod 941 connected to the linkage seat and a second transmission rod 942 connected to the control switch. The first transmission rod 941 is hinged to the handrail 3, and the first transmission rod 941 and the second transmission rod 942 are hinged to each other. Based on this, the control switch 95 can be slidably connected to the handrail 3 and slide back and forth to control the rotation of the first transmission rod 941 and the second transmission rod 942, so as to drive the linkage seat 93 to slide, which can also achieve the same transmission effect as the pull cable 94.

[0028] Furthermore, to ensure that when the pull cord 94 is released, the engaging member 91 automatically disengages from the locking hole 8, thus unlocking the chair back 4 and the chair seat 2, an elastic reset member 92 is provided between the engaging member 91 and the base 9. The elastic reset member 92 can be a tension spring or a compression spring; in this embodiment, only the compression spring is shown as the elastic reset member 92 located between the base 9 and the engaging member 91. At least one of the base 9 and the engaging member 91 has a locking post or locking hole that mates with the end of the compression spring to prevent the compression spring from bending during deformation. Figure 10a As shown, when the external force acts on the control switch 95 to tension the pull cable 94, the engaging member 91 moves and presses the elastic reset member 92, causing elastic deformation; as Figure 10b As shown, when the external force is removed and the pull wire 94 is relaxed, the elastic reset member 92 resets and the locking member 91 returns to its initial position; the locking member 91 automatically disengages from the locking hole 8; the locking member 91 will also slide back to its initial position by pressing the linkage seat 93 through the linkage inclined surface.

[0029] Example 2: Figure 12As shown, the difference between this embodiment and the above embodiment is that this embodiment provides another linkage structure 931, wherein the engaging member 91 is an L-shaped component, which is hinged to the base 9 via a rotating shaft and can rotate between the unlocked position and the locked position; the linkage seat 93 is still slidably connected to the base 9; an elastic member (not shown) is also provided between the linkage seat 93 and the base 9, the elastic member can be a tension spring or a compression spring, so that the linkage seat 93 can be reset; the elastic reset member 92 is a torsion spring sleeved on the rotating shaft and acting between the base 9 and the engaging member 91; the linkage structure 931 is provided on the linkage seat for pushing When the locking element 91 rotates, its pushing surface faces the locking element 91 in the unlocked position. When an external force acts on the control switch 95 and tensions the pull cable 94, the linkage seat 93 slides within the guide channel 96 and pushes the locking element 91 to the locked position via the pushing surface. At this time, the torsion spring and elastic component deform, and the locking element 91 engages with the corresponding locking hole 8, thus locking the backrest 4 and seat 2. When the pull cable 94 is released, the elastic component and torsion spring reset, causing the linkage seat 93 to reset in the opposite direction. Simultaneously, the locking element 91 also rotates in the opposite direction and disengages from the locking hole 8, achieving the same effect as in the above embodiment.

[0030] Example 3: The difference between this example and the above examples is that the elastic element 61 in this example is a self-locking gas spring (not shown) with a self-locking device. This self-locking gas spring is an existing device, and its specific structure will not be described in detail. The self-locking device can be connected to a switch via a flexible pull rope. The switch controls the extension and retraction of the self-locking gas spring piston rod, so that the backrest 4 and the seat 2 are locked or unlocked at a predetermined position. Based on this, this example does not require a seat locking control mechanism like that in Example 1 to achieve the locking and unlocking effect of the backrest 4 and the seat 2.

[0031] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A seat lock control mechanism characterized by comprising: It includes a locking hole (8) for mounting on the front link (6) or the rear link (7) and a control assembly. The control assembly includes a base (9) for mounting on the handrail (3), a locking member (91) movably connected to the base (9), and a linkage seat (93). A linkage structure (931) is provided between the linkage seat (93) and the locking member. A transmission member is connected to the linkage seat (93), and the transmission member is connected to a control switch (95). When the linkage structure (931) is configured to be activated by an external force, and the linkage seat (93) is moved through the transmission member, the linkage seat (93) and the locking member (91) engage or disengage in the corresponding locking hole (8), so that the front link (6) or the rear link (7) switches between a locked state and a swing state. There are multiple locking holes (8). Each locking hole (8) is spaced circumferentially on a front connecting rod (6) or a rear connecting rod (7); the transmission component is a pull wire (94) connected between the control switch (95) and the linkage seat (93); the locking component (91) is slidably connected to the base (9) to be close to or away from the locking hole (8), and the linkage seat (93) is slidably connected to the base (9) with the sliding direction of the linkage seat (93) perpendicular to the sliding direction of the locking component (91); the linkage structure (931) is a linkage inclined surface set on one of the linkage seat (93) and the locking component (91); in the initial state, the locking component (91) is disengaged from the locking hole (8), and when an external force is applied to the control switch (95) and the pull wire (94) is tensioned, the linkage inclined surface squeezes the locking component (91) and causes the locking teeth (911) to engage with the corresponding locking hole (8).

2. The seat lock control mechanism of claim 1, wherein: An elastic reset member (92) is provided between the locking member (91) and the base (9). When an external force acts on the control switch (95) and drives the linkage seat (93) to move, the locking member (91) moves and squeezes the elastic reset member (92) to produce elastic deformation. When the external force is removed, the elastic reset member (92) resets and the locking member (91) returns to its initial position.

3. The seat lock control mechanism of claim 2, wherein: When the elastic reset member (92) is reset, the locking member (91) presses the linkage seat (93) through the linkage inclined surface and resets the linkage seat (93).

4. The seat lock control mechanism of claim 2, wherein: The elastic reset member (92) is a compression spring disposed between the base (9) and the engaging member (91).

5. The seat lock control mechanism of claim 1, wherein: The base (9) is provided with a clearance window (97) corresponding to the card hole (8); the locking member (91) is provided with a locking tooth (911). When the locking member (91) is active, the locking tooth (911) is engaged or disengaged from the corresponding card hole (8) through the clearance window (97).

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