Seat quick locking structure

Abstract

The utility model discloses a seat fast locking structure which is used for fast connection between a seat and a movable plate of a vehicle-mounted seat base, and the movable plate is provided with four lock holes with notches. The quick locking structure is arranged at the bottom of the seat and comprises four locking columns rotationally connected with the bottom of the seat, and each locking column is provided with a protrusion with the outline smaller than that of the notch and a transmission tooth part; the transition shaft is in transmission connection with the transmission tooth parts of the four lock columns; the transition shaft is provided with a driven tooth part and a driving tooth part which is in transmission connection with the four transmission tooth parts; the driving rack shaft is in transmission connection with the transition shaft; an operation end is arranged at the outer end of the driving rack shaft, and an empty groove is formed in the side edge of the seat and used for containing the operation end and the hand of an operator. The four lock columns can be driven to rotate at the same time, so that the protrusions are far away from the positions of the notches, and a locking state is formed; the four lock columns can be synchronously locked or unlocked, so that quick connection can be realized; and the empty groove is formed in the side edge and is not exposed outside, so that the appearance of the seat is not influenced.

Description

Technical Field

[0001] The utility model relates to a locking structure, more specifically a seat quick locking structure. Background Art

[0002] Welfare chairs for people with limited mobility typically have a fixed connection between the seat portion and the retractable movable plate of the seat base, such as the structure described in the inventor's patent document CN202210706011.6. However, when the seat portion needs to be designed to be detachably connected to the movable plate of the seat base, four connection positions and four operations are generally required, which is time-consuming. Moreover, if the operation positions are exposed, it is not aesthetically pleasing. Therefore, it is necessary to develop a quick connection structure that can be operated quickly and form a reliable and stable connection relationship. Utility Model Content

[0003] The purpose of the utility model is to provide a seat quick lock structure in view of the above problems existing in the prior art.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model discloses a seat quick lock structure, which is used for the quick connection between a seat and a movable plate of a vehicle seat base, wherein the movable plate is provided with four lock holes with notches; the quick lock structure is provided at the bottom of the seat, and comprises four lock posts rotatably connected to the bottom of the seat, the lock posts are provided with a protrusion and a transmission tooth portion whose outline is smaller than the outline of the notch; the quick lock structure also comprises a transition shaft transmission-connected to the transmission tooth portions of the four lock posts; the transition shaft is provided with a driven tooth portion and an active tooth portion transmission-connected to the four transmission tooth portions; the quick lock structure also comprises an active rack shaft transmission-connected to the transition shaft; the outer end of the active rack shaft is provided with an operating end, The side of the seat is provided with an empty groove to accommodate the operating end and the operator's hand; when the operator pushes the active rack shaft inward to move inward, the active rack shaft drives the transition shaft to rotate through the meshing relationship between the rack portion and the driven tooth portion, and the active tooth portion then drives the four lock pillars to rotate in the forward direction through the transmission belt or transmission chain, so that the protrusion is away from the position of the notch, forming a locked state; when the operator pulls out the active rack shaft, the four lock pillars are driven to rotate in the reverse direction, so that the protrusion corresponds to the position of the notch, and the seat and the movable plate can be quickly separated vertically.

[0006] Preferably, the bottom of the seat is provided with a sliding groove slidably connected to the active rack shaft.

[0007] Preferably, the operating end is a handle ring rotatably connected to the outer end of the active rack shaft.

[0008] Preferably, the handle ring is further provided with a connecting portion at one end close to the active rack shaft, and the connecting portion is provided with a locking convex edge; the empty groove is provided with a locking groove corresponding to the locking convex edge; when the handle ring is pushed in to the innermost end, the handle ring is rotated until the locking convex edge is embedded in the locking groove, so that they are in a locked state.

[0009] Preferably, the transmission belt is a synchronous belt.

[0010] Preferably, the seat bottom is further provided with three tensioning transmission wheels, each located between two of the locking cylinders; and further includes a tensioning shaft for rotationally connecting the tensioning transmission wheels.

[0011] Preferably, at least one of the tensioning shafts is adjustably fixedly connected to the seat bottom.

[0012] Preferably, the bottom plate of the seat bottom is provided with four mounting holes for respectively mounting the four locking posts; the protrusion of the locking post is located at the lower end and protrudes from the bottom of the bottom plate; the transmission gear portion is located above the bottom plate.

[0013] Compared with the prior art, the present invention has the following advantages: The seat quick-lock structure of the present invention features an active rack shaft, which, through a drive belt or chain, simultaneously drives four locking pins to rotate, moving the protrusion away from the notch, achieving a locked state. The four locking pins can be locked or unlocked synchronously, achieving a quick connection with reliable connection strength. The structure also allows for a quick, secure connection between the seat portion and the movable plate of the seat base. Furthermore, the recessed slot is located on the side, leaving it exposed and not detracting from the seat's appearance. Furthermore, a connecting portion with a locking lip is employed. When the locking pins are locked, a handle can be rotated to engage the lip within the slot, maintaining the locked state between the seat portion and the movable plate of the seat base and preventing loosening without external force. Furthermore, three tensioning drive wheels are employed to increase the wrap angle between the drive belt or chain and the transmission teeth, improving transmission efficiency. A tensioning shaft can also be designed to be adjustable and fixedly connected to the seat base to adjust the tension of the drive belt or chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a side view of a seat structure equipped with a specific embodiment of a seat quick lock structure of the utility model (the vehicle seat base is in the stowed state);

[0015] Figure 2 for Figure 1 A partial enlarged view of the side of the seat in the embodiment (empty slot location);

[0016] Figure 3 for Figure 1A schematic plan view of the connection position of the seat bottom and the movable plate of the vehicle seat base in the embodiment (separable state);

[0017] Figure 4 A plan view of the connection position of the movable plate between the seat bottom and the vehicle seat base (locked state);

[0018] Figure 5 for Figure 1 A schematic plan view of the movable panel of the vehicle seat base in the embodiment;

[0019] Figure 6 for Figure 1 Partial cross-sectional view of an embodiment (lock cylinder position).

[0020] Reference numerals

[0021] 10 seats 100 empty slots

[0022] 101 Lock slot 109 Slide slot

[0023] 13 bottom plate 131 mounting hole

[0024] 18 tensioning shaft 19 tensioning drive wheel

[0025] 20 Car seat base 21 Activity board

[0026] 210 keyhole 211 notch

[0027] 30 Locking cylinder 31 Protrusion

[0028] 32 Transmission gear 40 Transition shaft

[0029] 41 driven gear 42 driving gear

[0030] 50 driving rack shaft 51 rack part

[0031] 60 Operation terminal 61 Handle ring

[0032] 62 connecting portion 63 locking convex edge

[0033] 90 transmission belt DETAILED DESCRIPTION

[0034] The following examples will be used to clearly and completely describe the technical solutions of the present invention. Obviously, the following examples are only a part of the present invention, not all of the examples. Based on the examples in the present invention, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0036] It should also be understood that the terms used in this specification of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the specification of the embodiments of the present invention and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0037] like Figures 1 to 5 As shown, the utility model provides a seat quick lock structure for quickly connecting a seat 10 to a movable plate 21 of a vehicle seat base 20, wherein the movable plate 21 is provided with four lock holes 210 with notches 211; the quick lock structure is provided at the bottom of the seat 10, and includes four lock posts 30 rotatably connected to the bottom of the seat 10, the lock posts 30 are provided with a protrusion 31 with a profile smaller than the profile of the notches 211 and a transmission tooth portion 32; further includes a transition shaft 40 transmission-connected to the transmission tooth portions of the four lock posts 30; the transition shaft 40 is provided with a driven tooth portion 41, and an active tooth portion 42 transmission-connected to the four transmission tooth portions 32; further includes an active rack shaft 50 transmission-connected to the transition shaft 40; the outer end of the active rack shaft 50 is provided with an operating end 60. A slot 100 is provided on the side of the seat 10 to accommodate the operating end 60 and the operator's hand; when the operator pushes the active rack shaft 50 inward, the active rack shaft 50 drives the transition shaft 40 to rotate through the meshing relationship between the rack portion 51 and the driven tooth portion 41, and the active tooth portion 42 then drives the four lock columns 30 to rotate in the forward direction through the transmission belt 90 (it can also be a transmission chain in other embodiments), so that the protrusion 31 is away from the position of the notch 211, forming a locked state; when the operator pulls out the active rack shaft 50, it drives the four lock columns 30 to rotate in the reverse direction, so that the protrusion 31 corresponds to the position of the notch 211, and the seat 10 and the movable plate 21 can be quickly separated vertically.

[0038] More specifically, a sliding groove 109 is provided at the bottom of the seat 10 and is slidably connected to the driving rack shaft 50 .

[0039] More specifically, the operating end 60 is a handle ring 61 rotatably coupled to the outer end of the driving rack shaft 50 .

[0040] More specifically, a connecting portion 62 is provided at one end of the handle ring 61 close to the active rack shaft 50, and the connecting portion 62 is provided with a locking protrusion 63; the empty groove 100 is provided with a locking groove 101 corresponding to the locking protrusion 63; when the handle ring 61 is pushed to the innermost end, the handle ring 61 is rotated until the locking protrusion 63 is embedded in the locking groove 101, so that they are in a locked state.

[0041] More specifically, the transmission belt 90 is a synchronous belt. More specifically, the bottom of the seat 10 is further provided with three tensioning transmission wheels 19, respectively located between the two locking posts 30; and further comprising a tensioning shaft 18 for rotatably connecting the tensioning transmission wheels 19.

[0042] More specifically, at least one tensioning shaft 18 is adjustably fixedly coupled to the bottom of the seat 10 .

[0043] More specifically, if Figure 6 As shown, the bottom plate 13 at the bottom of the seat 10 is provided with four mounting holes 131 for mounting four locking posts 30 respectively; the protrusion 31 of the locking post is located at the lower end and protrudes from the bottom of the bottom plate 13; the transmission tooth portion 32 is located above the bottom plate 13.

[0044] This quick-lock mechanism is particularly suitable for chairs with casters. After the casters are installed (for detachable casters) or extended (for retractable casters), the locking post is rotated to a detachable position. The seat base is then operated to lower the movable plate, thereby detaching the seat from the movable plate and allowing the seat to be moved with the support of the casters. The caster structure of the chair is not shown in the above embodiment because it does not fall within the scope of protection of the present invention.

[0045] In summary, the seat quick-lock structure of the present invention features an active rack shaft that, through a drive belt or chain, simultaneously drives four locking pins to rotate, moving the protrusion away from the notch, achieving a locked state. The four locking pins can be locked or unlocked synchronously, achieving a quick connection with reliable connection strength. This allows for a quick-lock connection between the seat portion and the movable plate of the seat base. Furthermore, the recessed slot is located on the side, leaving it exposed and not detracting from the seat's appearance. Furthermore, a connecting portion with a locking lip is employed. When the locking pins are locked, a handle can be rotated to engage the lip within the slot, maintaining the locked state between the seat portion and the movable plate of the seat base and preventing loosening without external force. Furthermore, three tensioning drive pulleys are employed to increase the wrap angle between the drive belt or chain and the transmission teeth, improving transmission efficiency. A tensioning shaft can also be designed to be adjustable and fixedly connected to the seat base to adjust the tension of the drive belt or chain.

[0046] The above examples are merely used to further illustrate the technical content of the present invention for easier understanding by the reader. However, they do not limit the implementation of the present invention to these examples. Any technical extension or reinvention based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A seat quick lock structure for quickly connecting a seat to a movable plate of a vehicle seat base, characterized in that The movable plate is provided with four lock holes with notches; the quick lock structure is provided at the bottom of the seat, including four lock posts rotatably connected to the bottom of the seat, the lock posts are provided with a protrusion and a transmission tooth portion with a profile smaller than the notch; it also includes a transition shaft transmission-connected to the four lock post transmission teeth; the transition shaft is provided with a driven tooth portion, and an active tooth portion transmission-connected to the four transmission teeth portions; it also includes an active rack shaft transmission-connected to the transition shaft; the outer end of the active rack shaft is provided with an operating end, and the side of the seat is provided with an empty slot to accommodate the operating end end and the operator's hand; when the operator pushes the active rack shaft inward to move inward, the active rack shaft drives the transition shaft to rotate through the meshing relationship between the rack portion and the driven tooth portion, and the active tooth portion then drives the four lock pillars to rotate forward through the transmission belt or transmission chain, so that the protrusion is away from the position of the notch, forming a locked state; when the operator pulls out the active rack shaft, the four lock pillars are driven to rotate in the opposite direction, so that the protrusion corresponds to the position of the notch, and the seat and the movable plate can be quickly separated vertically.

2. A seat quick lock structure according to claim 1, characterized in that The bottom of the seat is provided with a sliding groove which is slidably connected to the active rack shaft.

3. A seat quick lock structure according to claim 2, characterized in that The operating end is a handle ring rotatably connected to the outer end of the active rack shaft.

4. A seat quick lock structure according to claim 3, characterized in that The handle ring is also provided with a connecting portion at one end close to the active rack shaft, and the connecting portion is provided with a locking convex edge; the empty groove is provided with a locking groove corresponding to the locking convex edge; when the handle ring is pushed in to the innermost end, the handle ring is rotated until the locking convex edge is embedded in the locking groove.

5. A seat quick lock structure according to claim 4, characterized in that The transmission belt is a synchronous belt.

6. A seat quick lock structure according to claim 1, characterized in that The seat bottom is also provided with three tensioning transmission wheels, which are respectively located between the two locking pillars; and also includes a tensioning shaft for rotationally connecting the tensioning transmission wheels.

7. A seat quick lock structure according to claim 6, characterized in that At least one of the tensioning shafts is adjustably fixedly connected to the seat bottom.

8. A seat quick lock structure according to any one of claims 1 to 7, characterized in that The bottom plate of the seat bottom is provided with four mounting holes for respectively mounting the four locking posts; the protrusion of the locking post is located at the lower end and protrudes from the bottom of the bottom plate; the transmission gear portion is located above the bottom plate.

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