Locking piece and locking mechanism for seat chassis and seat chassis

Abstract

The utility model discloses a locking piece for a seat chassis, a locking mechanism and the seat chassis, a single plate is integrally bent to form a body, and the body formed by bending has higher structural strength and rigidity, so that stable locking fit between the locking piece and a movable locking piece is ensured; during locking, the gear groove formed in the thickness direction of the body can also form enough contact area with the movable locking piece; compared with a locking piece with a plurality of tailor-welded thin plate structures, the locking mechanism has the advantages that the manufacturing process is simpler, and the manufacturing cost of the seat chassis can be effectively reduced when the locking mechanism formed by the locking piece and the movable locking piece is applied to the seat chassis.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seat, especially a locking piece for seat chassis, locking mechanism and seat chassis. BACKGROUND

[0002] The seat chassis is a component that cannot be removed when the office chair or ergonomic chair is tilted and locked, and is usually arranged at the lower end of the office chair or ergonomic chair.

[0003] As shown in the prior art, a locking mechanism in a seat chassis comprises a movable locking piece 3 and a locking piece directly or indirectly fixed on the chair back connecting piece 7. Figure 10 The locking piece is a block-shaped body, and the thickness of the block-shaped body is greater than that of the plug-in plate.

[0004] The plate with a relatively thin thickness can be directly punched into place, but the thickness of the block-shaped body is relatively thick, and it is difficult to directly punch and process. SUMMARY

[0005] The utility model provides a locking piece for seat chassis, locking mechanism and seat chassis, and the single plate is integrally bent to form the body, so that the locking piece has good strength and rigidity.

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

[0007] A locking piece for a seat chassis comprises a body integrally bent from a single plate, and the body is provided with at least one gear slot recessed inward along the thickness direction of the body.

[0008] As preferred, the part of the body where the gear slot is opened is the locking part, and the part of the body where the gear slot is not opened is the supporting part for supporting the locking part; the supporting part can increase the stability and structural strength of the locking part, and avoid the deformation of the locking part.

[0009] As preferred, the body of the single plate is integrally bent and formed into a U-shaped structure, the U-shaped body includes the locking part where the gear slot is opened, and two supporting parts where the gear slot is not opened, and the two supporting parts are integrally formed at the two ends of the locking part; the two ends of the locking part are stably supported.

[0010] As preferred, the body of the single plate is integrally bent and formed into a L-shaped structure, the L-shaped body includes the locking part where the gear slot is opened, and a single supporting part where the gear slot is not opened, and the supporting part is integrally formed at one end of the locking part; the locking part is stably supported.

[0011] As preferred, the body of the single plate is integrally bent and formed into a "mouth" shape, the "mouth" shaped body includes the locking part where the gear slot is opened, and two L-shaped supporting parts where the gear slot is not opened, and the two L-shaped supporting parts are integrally formed at the two ends of the locking part.

[0012] As preferred, the body of the single plate is integrally bent and formed into an arc shape, and the gear slot is opened in the middle of the arc-shaped body; the arc-shaped body also has good structural strength and rigidity, and also has a stable locking effect.

[0013] As preferred, the thickness of the locking part is in the range of 3mm-8mm.

[0014] A locking mechanism includes the locking part and the movable locking member, and the movable locking member can be inserted into or removed from the corresponding gear slot on the locking part.

[0015] A seat chassis includes the locking mechanism.

[0016] As preferred, the seat chassis includes a base, the upper end of the base is provided with a seat connecting part, the seat connecting part is hinged to the base; the rear end of the base is provided with a back connecting part, the back connecting part is hinged to the base and the seat connecting part at the same time, so that the back connecting part forms linkage to the seat connecting part when the back connecting part rotates forward and backward; the locking part is welded to one of the seat connecting part and the base, and the movable locking member is movably connected to the other one of the seat connecting part and the base, and the movable locking member is removed from or inserted into the corresponding gear slot to lock or unlock the back connecting part rotated to the corresponding position.

[0017] As preferred, the seat chassis includes a base, the rear end of the base is rotatably connected with a back connecting part, the locking part is welded to one of the back connecting part and the base, and the movable locking member is movably connected to the other one of the back connecting part and the base, and the movable locking member is removed from or inserted into the corresponding gear slot to lock or unlock the back connecting part rotated to the corresponding position.

[0018] The utility model discloses the beneficial effect of adopting the technical scheme is:

[0019] The utility model discloses the lock piece is replaced by single board integral bending structure from multiple tailor-welded thin plate structure, and the body of bending has higher structural strength and rigidity, guarantees that lock piece and movable lock piece form stable locking cooperation, when locking, the gear slot of opening along the thickness direction of body can also form enough contact area with movable lock piece, compared with multiple tailor-welded thin plate structure's lock piece, and the manufacturing process is simpler, and the lock piece is applied to seat chassis, and the manufacturing cost of seat chassis can also be reduced effectively. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the appearance drawing of seat chassis;

[0021] Figure 2 It is the sectional view of lock piece position on seat chassis;

[0022] Figure 3 It is the schematic drawing of lock piece welding in the lower end of chair seat connecting piece;

[0023] Figure 4 It is the enlarged view of movable lock piece disengaging gear slot under unlocking state;

[0024] Figure 5 It is the enlarged view of movable lock piece inserting gear slot under locking state;

[0025] Figure 6 It is the enlarged view of lock piece in embodiment 2;

[0026] Figure 7 It is the enlarged view of lock piece in embodiment 3;

[0027] Figure 8 It is the enlarged view of lock piece in embodiment 4;

[0028] Figure 9 It is the sectional view of lock piece directly welding in chair back connecting piece in embodiment 5;

[0029] Figure 10 It is the enlarged view of lock piece in seat chassis in background art;

[0030] The reference numerals in the attached figures are as follows: 1-locking part, 2-support part, 3-movable locking part, 4-linkage torsion spring, 5-control lever, 6-base, 7-back connector, 8-seat connector, 9-first hinge shaft, 11-gear groove, 12-positioning protrusion, 31-insertion locking part, 32-linkage part, 41-first linkage arm, 42-second linkage arm, 61-guide part, 62-guide groove, 81-side extension, 82-positioning hole, 91-second hinge shaft. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0034] Example 1: As Figures 1-5 As shown, this embodiment provides a locking component for a seat chassis, including a body integrally bent from a single plate. The body is made of metal material, and the body has at least one recessed groove 11 along the thickness direction of the body. The bent plate-shaped body has better structural strength and rigidity. When the groove 11 is opened along the thickness direction of the body, it can form a sufficient contact area with the movable locking component 3. Compared with the locking component structure of multiple thin plates welded together, the locking component in this embodiment only needs to be bent directly into place on the plate with the groove 11, so it has the advantages of simple manufacturing and lower cost.

[0035] Furthermore, in this embodiment, after a single plate is bent, it will form an intersecting locking part 1 and a supporting part 2. The part of the main body with a gear slot 11 is the locking part 1, and the remaining part of the main body without a gear slot 11 is the supporting part 2 for supporting the locking part 1. After the locking part is fixed in the seat chassis, the supporting part 2 can increase the stability and structural strength of the locking part 1 and prevent the locking part 1 from deforming.

[0036] Further, in the embodiment, to ensure that the locking member has sufficient structural strength and good locking effect, the single plate is integrally bent and formed into a U-shaped body, the U-shaped body including a locking portion 1 having a gear slot 11, and two support portions 2 without the gear slot 11, the two support portions 2 being integrally formed at both ends of the locking portion 1 respectively; the two support portions 2 can strengthen both ends of the locking portion 1, so that the locking member is more stable when cooperating with the movable locking member 3.

[0037] Further, the locking member is a bent plate structure, and the thickness of the plate body should be within a reasonable range; if the thickness of the locking member is too small, the structural strength of the locking member will be insufficient, and the locking member is easy to deform when cooperating with the movable locking member 3; if the thickness of the locking member is too large, the bending processing of the plate member will be difficult, therefore, the thickness of the locking member in the embodiment is 3-8 mm; within this range, the locking member is easy to bend, and after processing, the locking member also has good structural strength and stability.

[0038] Further, a locking mechanism is provided, including the movable locking member 3 and the locking member; the movable locking member 3 in the embodiment is a plug, the movable locking member 3 can be inserted into or removed from the corresponding gear slot 11 on the locking portion 1; to further increase the contact area of the movable locking member 3 and the locking member, and ensure that the movable locking member 3 and the gear slot 11 have good locking effect, the gear slots 11 are symmetrically arranged on the locking portion 1 of the locking member, and the movable locking member 3 is correspondingly provided with a plug locking portion 31, the plug locking portions 31 on both sides are inserted into or removed from the corresponding gear slot 11, to complete locking or unlocking.

[0039] Further, the seat chassis is provided with the locking mechanism; in particular, the seat chassis in the embodiment comprises a base 6, the upper end of the base 6 is provided with a seat connecting piece 8, the seat connecting piece 8 is hinged to the base 6; wherein the base 6 is provided with upward extending side portions on both sides, the seat connecting piece 8 is provided with downward extending side extending portions 81 on both sides, and the corresponding side extending portions 81 are rotationally connected to the side portions; the rear end of the base 6 is provided with a back connecting piece 7, the back connecting piece 7 is hinged to the base 6 and the seat connecting piece 8, so that the back connecting piece 7 is linked to the seat connecting piece 8 when the back connecting piece 7 rotates forward and backward; wherein the back connecting piece 7 is also provided with side connecting portions on both sides, the side connecting portions are hinged to the side portions of the base 6 through a first hinge shaft 9, and the side connecting portions are hinged to the side extending portions 81 of the seat connecting piece 8 through a second hinge shaft 91; the locking piece is welded to one of the seat connecting piece 8 and the base 6, and the movable locking piece 3 is movably connected to the other one of the seat connecting piece 8 and the base 6; in the embodiment, the locking piece is welded to the lower end of the seat connecting piece 8, and the movable locking piece 3 is movably connected to the base 6; the movable connection can be rotational connection or sliding connection, for example, the movable locking piece 3 is slidingly connected to the base 6 in the embodiment; when the back connecting piece 7 rotates backward, the seat connecting piece 8 is linked to move, so that the corresponding gear slot 11 is aligned with the plate-shaped movable locking piece 3; when the back connecting piece 7 rotates to a predetermined position, the movable locking piece 3 is inserted into the corresponding gear slot 11, so as to lock the back connecting piece 7 rotating to the corresponding position; when it is needed to unlock the back connecting piece 7, the movable locking piece 3 is pulled out of the corresponding gear slot 11, so that the back connecting piece 7 is switched from the locked state to the unlocked state.

[0040] Further, the locking piece is welded to the lower end of the seat connecting piece 8, in order to facilitate welding positioning, the upper end of the locking piece is provided with a protruding positioning protrusion 12, the seat connecting piece 8 is provided with a corresponding positioning slot 82, the positioning protrusion 12 is matched with the positioning slot 82, and the positioning protrusion 12 is inserted into the positioning slot 82 to form welding positioning when welding, so as to improve the welding quality of the locking piece and the seat connecting piece 8.

[0041] Further, the seat chassis is provided with a control mechanism for moving the movable locking piece 3, the control mechanism comprises a control rod 5 inserted into the base 6 along the side portion, a linkage mechanism is arranged between the control rod 5 and the movable locking piece 3, the linkage mechanism comprises a linkage portion 32 arranged on the movable locking piece 3, the linkage portion 32 is a bolt fixed on the movable locking piece 3, the control rod 5 is provided with a insertion hole, a linkage torsion spring 4 is arranged between the linkage portion 32 and the control rod 5, the linkage torsion spring 4 is provided with a first linkage arm 41 and a second linkage arm 42, the first linkage arm 41 is hooked on the bolt, and the second linkage arm 42 is inserted into the insertion hole; when the control rod 5 moves, the movable locking piece 3 can be controlled to be inserted into or pulled out of the corresponding gear slot 11 through the linkage mechanism.

[0042] Further, the base 6 is provided with a guide 61 located at the upper end of the movable locking member 3, the guide 61 is provided with a guide groove 62 extending along the sliding direction of the movable locking member 3, the position of the guide groove 62 corresponds to the position of the linkage 32, the linkage 32 is slidingly connected in the guide groove 62, and the guide groove 62 forms a sliding guide for the movable locking member 3.

[0043] Embodiment 2: The difference between this embodiment and the above embodiments is that the bending profile of the locking member is different, as shown in Figure 6 The locking member in this embodiment includes a body formed by bending a single plate into an L-shaped structure, the L-shaped body includes a locking portion 1 provided with a gear slot 11, a single support portion 2 without the gear slot 11, and the support portion 2 is integrally formed at one end of the locking portion 1; the single support portion 2 can also support the locking portion 1, ensuring that the locking member welded in the seat chassis has sufficient strength, so that when locked with the movable locking member 3, the same locking effect can also be formed on the back connecting member 7 on the seat chassis.

[0044] Embodiment 3: The difference between this embodiment and the above embodiments is that the bending profile of the locking member is different, as shown in Figure 7 The locking member in this embodiment includes a body formed by bending a single plate into a "mouth" shape, the "mouth" shaped body includes a locking portion 1 provided with a gear slot 11, and two L-shaped support portions 2 without the gear slot 11, and the two L-shaped support portions 2 are integrally formed at both ends of the locking portion 1; the L-shaped support portion 2 has a more stable support effect on the locking portion 1, ensuring that the locking member welded in the seat chassis has sufficient strength, so that when locked with the movable locking member 3, the same locking effect can also be formed on the back connecting member 7 on the seat chassis.

[0045] Embodiment 4: The difference between this embodiment and the above embodiments is that, as shown in Figure 8 The bending profile of the locking member is different, the locking member in this embodiment includes a body formed by bending a single plate into an arc shape, and the gear slot 11 is provided in the middle of the arc-shaped body; the arc can be a semicircular arc or other angle arc shape; on the arc-shaped body, the part in the middle where the gear slot 11 is provided is the locking portion 1, and the parts integrally formed on both sides of the locking portion 1 are the support portions 2, and the arc-shaped body can ensure that the locking member welded in the seat chassis has sufficient strength, so that when locked with the movable locking member 3, the same locking effect can also be formed on the back connecting member 7 on the seat chassis.

[0046] Embodiment 5: The difference between this embodiment and the above embodiments is that the locking mechanism is directly arranged between the back connecting member 7 and the base 6, as shown in Figure 9As shown, the seat chassis comprises a base 6, a back connecting piece 7 rotatably connected to the rear end of the base 6, a locking piece welded on one of the back connecting piece 7 and the base 6, and a movable locking piece 3 movably connected to the other one of the back connecting piece 7 and the base 6, in this embodiment, the locking piece is welded on the upper end of the back connecting piece 7, and the movable locking piece 3 is movably connected to the base 6; the movable connection can be a rotary connection or a sliding connection, for example, the movable locking piece 3 is slidingly connected to the base 6 in this embodiment; when the back connecting piece 7 is rotated backward, the corresponding gear slot 11 is aligned with the plate-shaped movable locking piece 3; when the back connecting piece 7 is rotated to a predetermined position, the movable locking piece 3 is inserted into the corresponding gear slot 11 to lock the back connecting piece 7 rotated to the corresponding position; when it is needed to unlock the back connecting piece 7, the movable locking piece 3 is withdrawn from the corresponding gear slot 11, so that the back connecting piece 7 is switched from the locked state to the unlocked state; thus, the same unlocking or locking effect as that of the back connecting piece 7 in the above embodiment is achieved.

[0047] The above description of the present application and its embodiments is illustrative, and is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above description, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, which should also belong to the protection scope of the present application.

Claims

1. A lock for a seat pan, characterized in that, It includes a body integrally bent from a single plate, and at least one gear slot (11) recessed inward along the thickness direction of the body is provided on the body.

2. A lock for a seat pan according to claim 1, wherein: The part of the body where the gear slot (11) is opened is the locking part (1), and the rest of the body where the gear slot (11) is not opened is the supporting part (2) for supporting the locking part (1).

3. A lock for a seat pan according to claim 2, wherein: The body is integrally bent from a single plate and forms a U-shaped structure. The U-shaped body includes a locking part (1) with a gear slot (11) opened, and two supporting parts (2) without the gear slot (11). The two supporting parts (2) are integrally formed at both ends of the locking part (1) respectively.

4. A lock for a seat pan according to claim 2, wherein: The body is integrally bent from a single plate and forms an L-shaped structure. The L-shaped body includes a locking part (1) with a gear slot (11) opened, and a single supporting part (2) without the gear slot (11). The supporting part (2) is integrally formed at one end of the locking part (1).

5. A lock for a seat pan according to claim 2, wherein: The body is integrally bent from a single plate and forms a "square" - shaped body. The "square" - shaped body includes a locking part (1) with a gear slot (11) opened, and two L-shaped supporting parts (2) without the gear slot (11). The two L-shaped supporting parts (2) are integrally formed at both ends of the locking part (1) respectively.

6. A lock for a seat pan according to claim 1, wherein: The body is integrally bent from a single plate and forms an arc shape, and the gear slot (11) is opened in the middle of the arc-shaped body.

7. A lock for a seat pan according to claim 1, wherein: The thickness range of the locking part is 3 mm - 8 mm.

8. A locking mechanism characterized by, It includes a movable locking member (3) and the locking part according to any one of claims 1 - 7. The movable locking member (3) can be inserted into or withdrawn from the corresponding gear slot (11) on the locking part (1).

9. A seat pan characterized by, It includes the locking mechanism according to claim 8.

10. A seat pan according to claim 9, wherein: The seat chassis includes a base (6). A seat connecting member (8) is provided at the upper end of the base (6), and the seat connecting member (8) is hinged to the base (6); a backrest connecting member (7) is provided at the rear end of the base (6), and the backrest connecting member (7) is simultaneously hinged to the base (6) and the seat connecting member (8), so that when the backrest connecting member (7) rotates back and forth, it forms a linkage with the seat connecting member (8); the locking part is welded to one of the seat connecting member (8) and the base (6), and the movable locking member (3) is movably connected to the other of the seat connecting member (8) and the base (6). The movable locking member (3) withdraws from or inserts into the corresponding gear slot (11) to lock or unlock the backrest connecting member (7) rotated to the corresponding position.

11. A seat pan according to claim 9, wherein: The seat chassis includes a base (6). A backrest connecting member (7) is rotatably connected to the rear end of the base (6). The locking part is welded to one of the backrest connecting member (7) and the base (6), and the movable locking member (3) is movably connected to the other of the backrest connecting member (7) and the base (6). The movable locking member (3) withdraws from or inserts into the corresponding gear slot (11) to lock or unlock the backrest connecting member (7) rotated to the corresponding position.

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