Locking control mechanism

Abstract

The utility model provides a locking control mechanism which comprises a base and a sliding seat connected to the base in a sliding mode, a locking control assembly is arranged between the sliding seat and the base and comprises a locking rod and a locking block, the locking block is arranged on the sliding seat, the locking rod is connected to the base in a rotating mode, and the locking rod is connected to the base in a rotating mode. The base is provided with a control assembly capable of controlling the locking rod to rotationally tilt or reset; the locking block comprises a first wall face and a second wall face which are located at the two ends of the locking block respectively, the first wall face corresponds to the locking rod in position when the sliding base is located at the sliding ending position, and the second wall face corresponds to the locking rod in position when the sliding base is located at the sliding initial position. According to the lever principle, the locking control mechanism can lock or unlock the sliding seats at the initial sliding position and the final sliding position through the cocked or reset locking rod, and when the locking control mechanism is applied to the chair back, the application range of the chair can be further expanded, and the use experience feeling of the chair is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, and particularly to a locking control mechanism. Background Art

[0002] Most existing office chairs or ergonomic chairs have a reclining function. The backrest is rotatably connected to the seat chassis. After receiving a backward leaning force, the backrest can rotate backward. However, due to the height difference between the rotation point of the backrest and the rotation point of the human waist backward, it is difficult to coincide. On the premise that the seat position remains unchanged, relative displacement and friction will occur between the backrest and the user's back, resulting in discomfort; thus, the so-called "back rubbing" problem appears.

[0003] From the patent of the locking adjustment device with the publication number of CN221060109U, the applicant designed a mechanism that can change the sliding trajectory of the backrest. A sliding connection seat that can slide up and down on the backrest support and a rotating support member that is rotatably connected to both the backrest main body and the backrest support are provided between the backrest main body and the backrest support. When the sliding connection seat moves downward along the backrest support, the rotating support member rotates synchronously and guides the backrest main body to move forward, so that the backrest main body can also fit the waist and back when rotating backward; and in order to meet the sitting needs, a locking component is provided between the sliding connection seat and the backrest support. The locking component includes a rotating rod and a limiting block and a wrench connected to the rod body. The limiting block can be controlled to rotate by the wrench so that it abuts against the sliding connection seat at a higher position, so that the backrest main body will not slide up and down when reclining, expanding the applicable range of the seat.

[0004] This design can indeed prevent the backrest main body at a higher position from sliding downward when reclining according to the usage needs of the sitter. However, in actual use, the user also needs to lock the position of the backrest main body that slides to a lower position. In this patent, when the sliding connection seat and the backrest main body slide downward to a lower position, the sliding connection seat has blocked the limiting block, restricting the rotation path of the limiting block. Therefore, the position of the backrest main body cannot be locked after it slides downward, resulting in a limited applicable range of the seat. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a locking control mechanism. According to the lever principle, the locking rod can be tilted or reset to lock or unlock the sliding seat at the sliding initial position and the sliding end position. Applying this mechanism to the backrest can further expand the applicable range of the seat and improve the use experience of the seat.

[0006] The technical solution of the utility model is realized as follows:

[0007] A locking control mechanism comprises a base, a sliding seat slidably connected to the base, the sliding seat having an initial sliding position when not sliding and a sliding end position after sliding into position on the base; a locking control assembly is arranged between the sliding seat and the base, the locking control assembly comprises a locking rod and a locking block, the locking block is arranged on the sliding seat, the locking rod is rotatably connected to the base, and a control assembly capable of controlling the locking rod to rotate, tilt or reset is arranged on the base; the locking block comprises a first wall surface and a second wall surface respectively located at two ends of the locking block, when the sliding seat is at the sliding end position, the first wall surface corresponds to the position of the locking rod, and when the sliding seat is at the sliding initial position, the second wall surface corresponds to the position of the locking rod;

[0008] The locking control mechanism has a free mode and a locking mode, and the locking mode includes a first locking mode and a second locking mode; when the sliding seat slides in the forward direction to the sliding end position, the control locking mechanism can be switched to the first locking mode, and the control component can control the locking rod to tilt and press against the first wall surface to limit the reverse sliding of the sliding seat; when the control locking mechanism is switched to the free mode, the control component can control the locking rod to separate from the locking block, and the sliding seat can slide freely; when the sliding seat slides in the reverse direction to the sliding initial position, the control locking mechanism can be switched to the second locking mode, and the control component can control the locking rod to tilt and press against the second wall surface to limit the forward sliding of the sliding seat.

[0009] Preferably, the control assembly includes a movable rod and a driving control member connected to the movable rod. A driving inclined plane is provided on one end of the locking rod facing the movable rod. The driving control member includes a rotating rod rotatably connected to the base. The rotating rod is connected to the movable rod. A handle exposed on the base is connected to the rotating rod. The handle is turned to make the movable rod act on or separate from the driving inclined plane, so that the locking rod is rotated to tilt or reset, thereby controlling the locking mechanism to switch between the locking mode and the free mode. When locking is required, the movable rod can act on the driving inclined plane to tilt the locking rod. When unlocking is required, the movable rod can be separated from the driving inclined plane, and the locking rod will return to the initial position. The design is simple and ingenious.

[0010] Preferably, one end of the movable rod facing the locking rod is provided with a contact inclined surface opposite to the driving inclined surface. By turning the handle, the contact inclined surface can act on or separate from the driving inclined surface.

[0011] Preferably, a downwardly extending protrusion is provided at the opposite end of the tilted locking rod, and a column corresponding to the position of the protrusion is provided on the base, and when the locking rod tilts upward and abuts against the first wall or the second wall, the protrusion moves downward and abuts against the column to limit the tilting angle of the locking rod, thereby avoiding unnecessary pressure on the sliding seat caused by the locking rod due to excessive tilting angle.

[0012] Preferably, a second elastic member is provided between the locking rod and the base, and the second elastic member can provide elastic force for the locking rod to rotate and reset when the movable rod is separated from the driving inclined surface, so that the locking rod can be stably restored to the initial position and prevent the locking rod from accidentally tilting upward in the free mode, thereby ensuring the user experience of the chair back.

[0013] Preferably, a downwardly extending protrusion is provided at the opposite end of the tilted locking rod, a column corresponding to the position of the protrusion is provided on the base, and the second elastic member is a compression spring arranged between the protrusion and the column.

[0014] Preferably, the locking rod is rotated and tilted in an angle range of 3°-15°; this range is relatively reasonable. If the rotation angle is less than 3°, it is difficult for the locking rod to lock the locking block; if it exceeds 15°, the locking rod and the sliding seat are prone to top pressure interference.

[0015] Preferably, the rotating rod is provided with an insertion rod, and the movable rod is provided with a strip-shaped avoidance groove corresponding to the position of the insertion rod, and the insertion rod is inserted into the strip-shaped avoidance groove; when the rotating rod rotates, the strip-shaped avoidance groove avoids the insertion rod. While ensuring that the rotating rod can drive the movable rod and the locking rod to work, it can also prevent the rotating rod and the movable rod from getting stuck.

[0016] Preferably, the base is provided with a swing limit groove, which has two opposite limit end faces, and the handle is rotated between the two opposite limit end faces, so that the locking control mechanism switches between the locking mode and the free mode, thereby controlling the toggle range of the handle and ensuring the locking effect of the locking member on the locking block.

[0017] Preferably, the control assembly includes a movable rod and a driving control member connected to the movable rod, the driving control member includes a rotating rod rotatably connected to the base, the rotating rod is connected to the movable rod, and a handle exposed on the base is connected to the rotating rod; a linkage rod is hinged on the base, the linkage rod is an L-shaped structure, including a first branch rod and a second branch rod, the first branch rod acts on the locking rod, and a connecting rod is hinged between the second branch rod and the movable rod; the handle is turned to rotate the linkage rod and drive the locking rod to rotate, tilt or reset, thereby switching the control locking mechanism between the locking mode and the free mode. When locking is required, the first branch rod can act on the locking rod to tilt the locking rod, and when unlocking is required, the first branch rod can be separated from the locking rod, and the locking rod will return to the initial position. The design is simple and ingenious.

[0018] The beneficial effects of the utility model using the above technical solution are:

[0019] In the locking control mechanism of the present utility model, according to the lever principle, the locking rod is made to cooperate with or separate from the lock block on the sliding seat through the control component, so that the sliding seat can be switched between the free mode and the locking mode; since there are two opposite first wall surfaces and second wall surfaces on the lock block, and when the sliding seat is at the sliding end position, the first wall surface corresponds to the position of the locking rod, and when the sliding seat is at the sliding start position, the second wall surface corresponds to the position of the locking rod, the sliding seat can be locked at two different positions. When this mechanism is used in the sliding track-changing mechanism of the chair back, the backrest main body can be position-locked at both a relatively high initial position and a relatively low sliding end position, expanding the applicable range of the chair back and enhancing the use experience of the seat. Description of the Drawings

[0020] Figure 1 Schematic diagram of the sliding seat at a higher position;

[0021] Figure 2 Schematic diagram of the sliding seat at a lower position;

[0022] Figure 3 Exploded view of the sliding track-changing mechanism of the chair back;

[0023] Figure 4 Exploded view of the sliding track-changing mechanism of the chair back from another angle;

[0024] Figures 5a - 5b Schematic diagram of the switching between the free mode and the second locking mode in the locking control mechanism;

[0025] Figures 6a - 6b Schematic diagram of the switching between the free mode and the first locking mode in the locking control mechanism;

[0026] Figure 7 Enlarged view of the gland position;

[0027] Figure 8 Enlarged sectional view of the sliding track-changing mechanism of the chair back in the second locking mode;

[0028] Figure 9 Enlarged sectional view of the sliding track-changing mechanism of the chair back in the first locking mode;

[0029] Figures 10a - 10b Schematic diagram of the switching between the free mode and the second locking mode in the locking control mechanism of Embodiment 2;

[0030] The reference numerals of each figure are as follows: 1 - back bracket, 2 - sliding seat, 3 - backrest support, 4 - mating part, 5 - locking control mechanism, 11 - base, 11a - hanging part, 12 - side chute, 13 - rotating shaft hole, 14 - accommodating groove, 15 - swing limiting groove, 16 - column, 17 - compression spring, 18 - pressing block, 21 - locking block, 22 - first wall surface, 23 - second wall surface, 24 - hooking part, 31 - connecting part, 41 - sliding rod, 42 - guiding chute, 43 - rib, 51 - locking rod, 52 - movable rod, 53 - rotating rod, 54 - handle, 55 - cover plate, 151 - limiting end face, 511 - locking part, 512 - driving inclined surface, 513 - rotating shaft, 514 - avoiding cavity, 515 - convex block, 521 - contact inclined surface, 522 - strip-shaped avoiding groove, 523 - connecting rod, 524 - second sub-rod, 525 - first sub-rod, 526 - linkage rod, 531 - inserting rod. Detailed implementation manners

[0031] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0033] The present invention has multiple embodiments, and the specific implementation manners are as follows:

[0034] Embodiment 1: As Figures 1 - 9As shown in the figure, the present utility model provides a locking control mechanism, which is arranged on the backrest sliding and track-changing mechanism. The backrest sliding and track-changing mechanism includes a backrest support 1 and a backrest support member 3 arranged on the front side of the backrest support 1. A sliding seat 2 is provided between the backrest support member 3 and the backrest support 1. The sliding seat 2 is slidably connected to the backrest support 1 longitudinally. Specifically, a base 11 is provided on the front side of the backrest support 1, and longitudinal side chutes 12 are provided on both the left and right sides of the base 11. The sliding seat 2 is connected with corresponding sliding rods, and the sliding rods are slidably connected in the side chutes 12. The upper end of the backrest support member 3 is hinged to the sliding seat 2 to form a hinge end. The lower end of the backrest support member 3 has an integrally formed connecting portion 31, and the lower end of the backrest support 1 has an integrally formed mating portion 4. A track-changing guiding structure is provided between the connecting portion 31 and the mating portion 4. The connecting portion 31 is symmetrically arranged on both sides of the lower end of the backrest support member 3, and the mating portion 4 is symmetrically arranged on both sides of the lower end of the backrest support 1 and corresponds to the position of the connecting portion 31. Thus, both the left and right sides of the backrest support member 3 can be guided for track-changing, ensuring the stability of the backrest support member 3. The track-changing guiding structure includes a guide pin 41 and a guiding chute 42 that cooperate with each other. The guiding chute 42 extends obliquely forward and downward. The guide pin 41 is arranged on one of the mating portion 4 and the connecting portion 31, and the guiding chute 42 is arranged on the other of the mating portion 4 and the connecting portion 31.

[0035] When receiving the backward leaning force of the seated person, the backrest support 1 will recline backward, and the sliding seat 2 will slide downward from the initial higher position to the lower position. The backrest support member 3 rotates backward with the hinge end as the rotation center, and drives the track-changing guiding structure to guide the rotation path of the backrest support member 3, causing the lower end of the backrest support member 3 to move forward, so that the backrest support member 3 fits the human back better.

[0036] Furthermore, when the upper end of the backrest support member 3 rotates, its lower end has an arc-shaped rotation trajectory. Therefore, the guiding chute 42 is an arc-shaped chute that extends obliquely forward and downward. The arc-shaped chute can guide the backrest support member 3 while adapting to the rotation trajectory of the backrest support member 3, preventing the backrest support member 3 from getting stuck.

[0037] Furthermore, in this embodiment, for the convenience of installation, the guiding chute 42 is arranged on the mating portion 4, and the guide pin 41 is arranged on the connecting portion 31. When the lower end of the backrest support member 3 is matched with the backrest support 1, the guide pin 31 on the connecting portion 31 can be directly inserted into the guiding chute 42, which is simple and convenient to install and has a high assembly efficiency.

[0038] Furthermore, to ensure the use experience, a rib 43 having the same extending direction as the guiding chute 42 is provided on the mating portion 4. When the guide pin 41 slides in the guiding chute 42, the rib 43 contacts the connecting portion 31 and separates the connecting portion 31 from the mating portion 4, preventing the mating portion 4 from directly contacting the connecting portion 31, reducing the friction between the mating portion 4 and the connecting portion 31, and reducing the noise when the backrest support member 3 changes tracks.

[0039] Furthermore, after the backrest receives a backward leaning force, the backrest support 1 reclines backward and triggers the track-changing guiding structure, causing the sliding seat 2 to slide from a higher position to a lower position. To facilitate the reset of the backrest support 3 and the sliding seat 2, a first elastic member is provided between the sliding seat 2 and the backrest support 1. When the sliding seat 2 slides downward, the first elastic member deforms. When the sliding seat 2 slides upward to reset, the first elastic member provides elastic force for the sliding seat 2, making it easier for the backrest support 3 to reset. Specifically, a hook portion 24 is provided on one side of the sliding seat 2 facing the backrest support 1, and a hanging portion 11a is provided on one side of the backrest support 1 facing the sliding seat 2. The first elastic member is a tension spring (not shown) hooked on the hook portion 24 and the hanging portion 11a.

[0040] Furthermore, as Figures 5a - 9 shown, the mechanism further includes a locking control mechanism 5. The locking control mechanism 5 can slide-lock and unlock the sliding seat 2 in the higher position and the lower position, thereby expanding the applicable range of the backrest. Specifically, in this embodiment, for ease of explanation, the sliding seat 2 and the base 11 are considered as part of the locking control mechanism 5. In addition to the sliding seat 2 and the base 11, the locking control mechanism 5 further includes a locking control component. The locking control component includes a locking rod 51 and a locking block 21. The locking block 21 is provided on the sliding seat 2, and the locking rod 51 is rotatably connected to the base 1. A locking portion 511 extending toward the locking block 21 is provided on the locking rod 51. The locking block 21 includes a first wall surface 22 and a second wall surface 23 located at the upper and lower ends of itself respectively. The sliding seat 2 has a sliding initial position and a sliding end position on the base 11 when it does not slide. In the backrest sliding track-changing mechanism, the sliding initial position refers to the sliding seat 2 being in the higher position of the base 11, and the sliding end position refers to the sliding seat 2 being in the lower position of the base 11. When the sliding seat 2 is in the lower position, the first wall surface 22 corresponds to the position of the locking rod 51. When the sliding seat 2 is in the higher position, the second wall surface 23 corresponds to the position of the locking rod 51, and a control component is provided on the base 11 that can drive the locking rod 51 to rotate and then tilt up or reset.

[0041] According to the usage requirements of the sitter, the locking control mechanism 5 has a free mode and a locking mode. The locking mode includes a first locking mode for locking the sliding seat 2 at a lower position and a second locking mode for locking the sliding seat 2 at a higher position. Among them, the first locking mode is for the situation where after the backrest reclines, the sitter hopes to maintain the backrest support 3 in the chasing-back state without resetting. The second locking mode is for the situation where the sitter only hopes the backrest to recline while the backrest support 3 remains at a higher position without chasing back. Specifically, when the sliding seat 2 slides downward from a higher position to a lower position, the locking control mechanism 5 can be switched to the first locking mode. At this time, the control component can drive the locking rod 51 to tilt up, and make the locking part 511 abut against the first wall surface 22 to restrict the sliding seat 2 from sliding upward. When the locking control mechanism 5 is switched to the free mode, the control component can control the locking rod 51 to separate from the lock block 21. At this time, the sliding seat 2 can slide longitudinally. When the sliding seat 2 resets upward to a higher position, the locking control mechanism 5 can be switched to the second locking mode. At this time, the control component can drive the locking rod 51 to tilt up, and make the locking part 511 abut against the second wall surface 23 to restrict the sliding seat 2 from sliding downward. According to the lever principle, the control component can selectively act on the locking rod 51, so that the backrest support 3 can be switched among free sliding, high-position locking, and low-position locking, which can meet the various needs of the sitter and expand the applicable range of the backrest.

[0042] Furthermore, a receiving groove 14 is formed on the base 11. The locking rod 51 and the movable rod 52 are both arranged in the receiving groove 14, which saves the space occupied by the locking control mechanism 5. The locking rod 51 is arranged in the receiving groove 14 in the following way: a rotating shaft hole 13 is formed on the side wall of the receiving groove 14. The locking rod 51 has an integrally formed rotating shaft 513. For the convenience of installation, the rotating shaft hole 13 has a notch. The rotating shaft 513 can be placed into the rotating shaft hole 13 from the notch and is pressed by a pressing block 18 connected in the receiving groove 14. The side of the pressing block 18 pressing the rotating shaft 513 has an arc surface fitting with the rotating shaft 513. And in order to avoid the pressing block 18 during tilting or resetting, an avoidance cavity 514 corresponding to the position of the convex block 514 is provided on the locking rod 51.

[0043] Furthermore, the specific structure of the control component in this embodiment is as follows: the control component includes a movable rod 52 and a driving control component that acts on the movable rod 52. A driving inclined surface 512 is provided on the end of the locking rod 51 facing the movable rod 52. The driving control component includes a rotating rod 53 rotatably connected to the base 11, and a cover plate 55 for shielding the rotating rod 53 and the movable rod 52 is connected to the base 11; the rotating rod 53 is connected to the movable rod 52, and a handle 54 exposed on the back bracket 1 is connected to the rotating rod 53; the handle 54 is moved and the movable rod 52 is driven to act on or separate from the driving inclined surface 512, so that the locking rod 51 is tilted or reset, and then the locking control mechanism 5 is switched between the locking mode and the free mode; when locking is required, the movable rod 52 can act on the driving inclined surface 512 to tilt the locking rod 51. When unlocking is required, the movable rod 52 can be separated from the driving inclined surface 512, and the locking rod 51 will return to its initial position. The design is simple and ingenious, and easy to operate.

[0044] Furthermore, in order to ensure the control effect on the locking rod 51, a contact bevel 521 is provided at one end of the movable rod 52 facing the locking rod 51, which is opposite to the driving bevel 512. By turning the handle 54, the contact bevel 521 can be engaged or separated from the driving bevel 512; the contact bevel 521 can make the movable rod 52 and the locking rod 51 form surface contact instead of line contact, so that the action between the movable rod 52 and the locking rod 51 is smoother and more stable.

[0045] Furthermore, in the present embodiment, in order to ensure the locking effect, the reasonable angle range of the locking rod 51 for rotating and tilting is 3°-15°, which is relatively reasonable. For example, when the tilting angle of the locking rod 51 is less than 3°, it is difficult for the locking rod 51 to lock the locking block 21; if the tilting angle of the locking rod 51 exceeds 15°, it is easy for the locking rod 51 to have a top-pressure interference with the sliding seat 2, thereby affecting the use effect of the chair back; therefore, in order to prevent the tilting angle of the locking rod 51 from being too large, a downwardly extending protrusion 515 is provided at the opposite end of the tilted locking rod 51, and a column 16 corresponding to the position of the protrusion 515 is provided on the base 11. When the locking rod 51 tilts upward and abuts against the first wall 22 or the second wall 23, the protrusion 515 moves downward and abuts against the column 16 to limit the tilting angle of the locking rod 51, thereby avoiding unnecessary top-pressure interference between the locking rod 51 and the sliding seat 2 due to the excessive tilting angle.

[0046] Furthermore, a second elastic member is provided between the locking rod 51 and the base 11, and the second elastic member is a compression spring 17 arranged between the protrusion 515 and the column 16; the second elastic member can provide the locking rod 51 with elastic force for rotational restoration when the movable rod 52 is separated from the driving inclined surface 512; so that the locking rod 51 can stably return to its initial position, and prevent the locking rod 51 from accidentally tilting upward in the free mode, thereby ensuring the user experience of the chair back.

[0047] Furthermore, in order to ensure the flexibility of the rotating rod 53 when it acts on the movable rod 52, an insertion rod 531 is provided on the rotating rod 53, and a strip avoidance groove 522 corresponding to the position of the insertion rod 531 is provided on the movable rod 52, and the insertion rod 531 is inserted in the strip avoidance groove 522; when the rotating rod 53 rotates, the insertion rod 531 can drive the movable rod 52 to move, and at the same time, the strip avoidance groove 522 can avoid the insertion rod 531; to ensure that the rotating rod 53 can drive the movable rod 52 to stably act on the locking rod 51, it can also prevent the rotating rod 53 and the movable rod 52 from getting stuck.

[0048] Furthermore, when the handle 54 is turned by forces of different magnitudes, its rotation angle is also different. Different rotation angles will affect the locking and unlocking effects of the locking rod 51 on the sliding seat 2. Therefore, a swing limit groove 15 is provided on the base 11. The swing limit groove 15 has two opposite limit end faces 151. The handle 54 rotates between the two opposite limit end faces 151 to control the turning range of the handle 54, so that the locking control mechanism 5 can stably switch between the locking mode and the free mode.

[0049] Example 2: Figures 10a - 10b As shown, the difference between this embodiment and the above embodiment is that the linkage structure between the movable rod 52 and the locking rod 51 in this embodiment is different. The driving inclined surface 512 is not provided on the locking rod 51, but a linkage rod 526 is hinged on the base 11. The linkage rod 526 is an L-shaped structure, including a first branch rod 525 and a second branch rod 524. The first branch rod 525 and the second branch rod 524 are integrally formed. The first branch rod 525 acts on the locking rod 51, and a connecting rod 523 is hinged between the second branch rod 524 and the movable rod 52. The handle 54 is turned, The linkage rod 526 is rotated to drive the locking rod 51 to rotate, tilt or reset, thereby controlling the locking mechanism to switch between the locking mode and the free mode; specifically, the locking rod 51 presses the first sub-rod 525 to the bottom, and when locking is required, the linkage rod 526 is rotated to cause the first sub-rod 525 to press the locking rod 51 to tilt; when unlocking is required, the linkage rod 526 is rotated in the opposite direction to separate the first sub-rod 525 from the locking rod 51, and the locking rod 51 will return to its initial position. The design is simple and ingenious, and can achieve the same control effect on the locking rod 51 as the above embodiment.

[0050] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A locking control mechanism, characterized in that: The invention comprises a base (11), a sliding base (2) slidably connected to the base (11), the sliding base (2) having an initial sliding position when not sliding and a final sliding position after sliding into position on the base (11); a locking control component is provided between the sliding base (2) and the base (11), the locking control component comprising a locking rod (51) and a locking block (21), the locking block (21) being provided on the sliding base (2), the locking rod (51) being rotatably connected to the base (11), and a control component capable of controlling the locking rod (51) to rotate, tilt or reset is provided on the base (11); the locking block (21) comprises a first wall surface (22) and a second wall surface (23) respectively located at two ends of the locking block; when the sliding base (2) is located at the final sliding position, the first wall surface (22) corresponds to the position of the locking rod (51), and when the sliding base (2) is located at the initial sliding position, the second wall surface (23) corresponds to the position of the locking rod (51); The locking control mechanism has a free mode and a locking mode, and the locking mode includes a first locking mode and a second locking mode; when the sliding seat (2) slides in the forward direction to the sliding end position, the control locking mechanism can be switched to the first locking mode, and at this time the control component can control the locking rod (51) to tilt up and abut against the first wall surface (22), thereby limiting the sliding seat (2) from sliding in the reverse direction; When the locking mechanism is controlled to switch to the free mode, the control component can control the locking rod (51) to separate from the locking block (21), and the sliding seat (2) can slide freely; when the sliding seat (2) slides in the reverse direction to the initial sliding position, the locking mechanism can be controlled to switch to the second locking mode, and the control component can control the locking rod (51) to tilt up and abut against the second wall surface (23), thereby limiting the forward sliding of the sliding seat (2).

2. A locking control mechanism according to claim 1, characterized in that: The control assembly comprises a movable rod (52), a driving control member connected to the movable rod (52), a driving inclined surface (512) being provided on one end of the locking rod (51) facing the movable rod (52), and the driving control member comprises a rotating rod (53) rotatably connected to the base (11), the rotating rod (53) being connected to the movable rod (52), and a handle (54) exposed on the base (11) being connected to the rotating rod (53); the handle (54) is moved to engage or disengage the movable rod (52) from the driving inclined surface (512), so that the locking rod (51) is rotated, tilted or reset, thereby controlling the locking mechanism to switch between a locking mode and an unlocking mode.

3. A locking control mechanism according to claim 2, characterized in that: One end of the movable rod (52) facing the locking rod (51) is provided with a contact inclined surface (521) opposite to the driving inclined surface (512). The contact inclined surface (521) can be engaged with or separated from the driving inclined surface (512) by rotating the handle (54).

4. A locking control mechanism according to claim 1, characterized in that: A protrusion (515) extending downward is provided at the opposite end of the tilted locking rod (51), and a column (16) corresponding to the position of the protrusion (515) is provided on the base (11); when the locking rod (51) tilts upward and abuts against the first wall surface (22) or the second wall surface (23), the protrusion (515) moves downward and abuts against the column (16) to limit the tilting angle of the locking rod (51).

5. A locking control mechanism according to claim 2, characterized in that: A second elastic member is provided between the locking rod (51) and the base (11), and the second elastic member can provide elastic force for the locking rod (51) to rotate and reset when the movable rod (52) is separated from the driving inclined surface (512).

6. A locking control mechanism according to claim 5, characterized in that: A downwardly extending protrusion (515) is provided at the opposite end of the tilted locking rod (51), a column (16) corresponding to the position of the protrusion (515) is provided on the base (11), and the second elastic member is a compression spring (17) arranged between the protrusion (515) and the column (16).

7. A locking control mechanism according to claim 1, characterized in that: The locking rod (51) can be rotated and tilted in a range of 3° to 15°.

8. A locking control mechanism according to claim 2, characterized in that: The rotating rod (53) is provided with an insertion rod (531), the movable rod (52) is provided with a strip-shaped avoidance groove (522) corresponding to the position of the insertion rod (531), and the insertion rod (531) is inserted into the strip-shaped avoidance groove (522); when the rotating rod (53) rotates, the strip-shaped avoidance groove (522) avoids the insertion rod (531).

9. A locking control mechanism according to claim 2, characterized in that: The base (11) is provided with a swing limit groove (15), the swing limit groove (15) having two opposite limit end surfaces (151), and the handle (54) rotates between the two opposite limit end surfaces (151), thereby switching the locking control mechanism between a locking mode and an unlocking mode.

10. A locking control mechanism according to claim 1, characterized in that: The control assembly comprises a movable rod (52) and a driving control member connected to the movable rod (52), wherein the driving control member comprises a rotating rod (53) rotatably connected to a base (11), the rotating rod (53) being connected to the movable rod (52), and a handle (54) exposed on the base (11) being connected to the rotating rod (53); a linkage rod (526) being hingedly connected to the base (11), the linkage rod (526) being an L-shaped structure and comprising a first branch rod (525) and a second branch rod (524), the first branch rod (525) acting on a locking rod (51), and a connecting rod (523) being hingedly connected between the second branch rod (524) and the movable rod (52); the handle (54) is turned to rotate the linkage rod (526) and drive the locking rod (51) to rotate, tilt or reset, thereby controlling the locking mechanism to switch between a locking mode and an unlocking mode.

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