Multi-gear adjustable armrest locking structure

Abstract

The utility model relates to the technical field of furniture manufacturing, in particular to a handrail locking structure. The panel mainly comprises a panel body, the panel body comprises a first panel body and a second panel body which are hinged to each other, and the panel is characterized by further comprising a jacking part arranged on the first panel body and a limiting part arranged on the second panel body; the limiting part comprises a block body, a plurality of limiting grooves and an unlocking groove, wherein the limiting grooves and the unlocking groove are formed in the block body. The jacking part comprises a base, a triangular jacking head, a jacking rod which is mounted in the base and is connected with the triangular jacking head, and a positioning block which is vertically connected to the jacking rod; a bending positioning groove is formed in the base; and the positioning block slides in the bending positioning groove. According to the locking structure, the multi-gear adjustable and self-unlocking functions can be achieved through simple matching of mechanical locking components, and the locking structure has the advantages that the number of parts is small, the requirement for clearance fit is low, and reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture manufacturing, in particular to an armrest locking structure. Background Art

[0002] In modern furniture products, there are many furniture items equipped with armrests, such as various types of chairs and sofas. As people's pursuit of quality of life improves, higher requirements are also placed on the functional diversity and comfort of furniture armrests. Existing armrest devices can often achieve the front and back and height adjustment of the armrests, but cannot achieve the folding adjustment of the armrests relative to the panel. In real applications, due to the differences in body shapes and specialized comfort requirements of users, their requirements for the folding adjustment of the armrest panels are also increasing.

[0003] In order to realize the folding of the armrest panel, the built-in locking structure needs to have the ability to lock and automatically unlock. The Chinese patent document with publication number CN216675255U discloses a new type of multi-gear upward tilt angle control armrest, which includes a locking component with locking and unlocking functions. The locking component can meet the multi-gear upward tilt angle control of the armrest. It includes a reset ring, a gear, a wave spring ring, an end round gasket and a round cover. The gear adjustment and locking are realized by the meshing rotation between the gear teeth on the gear. When the upward tilt angle reaches the unlocking angle, it can be automatically unlocked and reset.

[0004] Although the above-mentioned locking assembly can realize the multi-level upward tilt angle control function of the armrest panel, it uses multiple gear components, and has the disadvantages of a large number of parts and high requirements for the coordination between gears. It may malfunction during long-term use, increasing the user's subsequent maintenance costs. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a multi-level adjustable armrest locking structure, which can realize the functions of multi-level adjustment and self-unlocking through the cooperation of simple mechanical locking components. It has the advantages of small number of parts, loose clearance matching requirements and high reliability.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A multi-stage adjustable armrest locking structure comprises a panel, wherein the panel comprises a first panel and a second panel hinged to each other, and is characterized in that it also comprises a top-fitting portion arranged on the first panel and a limiting portion arranged on the second panel; the limiting portion comprises a block and a plurality of limiting grooves and an unlocking groove arranged on the block, and the unlocking groove is arranged at an angle; the top-fitting portion comprises a base, a triangular jack, a push rod installed in the base and connected to the triangular jack, and a positioning block vertically connected to the push rod; a bending positioning groove is arranged on the base; and the positioning block slides in the bending positioning groove.

[0008] Therefore, the panel includes a first panel and a second panel hinged to each other, the top part is arranged on the first panel, and the limiting part is arranged on the second panel. When the first panel and the second panel are folded against each other, they will respectively drive the top part and the limiting part thereon to perform spatial rotational displacement.

[0009] The limiting portion includes a block and a plurality of limiting grooves and an unlocking groove arranged on the block. The plurality of limiting grooves are arranged in sequence in a direction perpendicular to the second panel to form a locking basis for multiple gears. An unlocking groove is also arranged in a direction close to the second panel. The unlocking groove is arranged at an angle to cooperate with the triangular head.

[0010] The top-fitting part includes a base, in which a top rod capable of forward and backward and rotational displacement is arranged. A triangular top head is fixedly connected to one end of the top rod near the limiting part. The triangular top head has an inclined surface and can be unlocked with the inclined unlocking groove. The front and rear displacement ability of the top rod can come from an elastic element, such as a spring, and the rotational displacement ability comes from the radial torsion generated by the mutual extrusion between the triangular top head and the inclined unlocking groove. A positioning block is vertically connected to the top rod, and a bent positioning groove is arranged on the base. The positioning block can slide in the bent positioning groove. When it is located at different positions, a specific snap-fit ​​effect can be achieved. The specific implementation form of the positioning block can be a short screw with a thread, a metal rod with a clamp, or various rods assembled by extrusion and fitting to achieve a stable snap-fit ​​function.

[0011] Specifically, when the first panel and the second panel are in the same plane, the top joint part and the limiting part are in the initial engagement position, and the triangular head is engaged in the topmost limiting groove on the block. When the first panel is folded relative to the second panel, the triangular head will be squeezed and rotated in the direction close to the second panel. When the triangular head slides into the next limiting groove, the top rod retracts and drives the positioning block on it to move away from the limiting part. At this time, the positioning block can slide in the bending positioning groove to ensure the smooth displacement of the top rod. At this time, the triangular head is engaged in the next limiting groove, which can ensure that the first panel and the second panel are locked at a certain angle, that is, the setting of the first gear is completed.

[0012] When the triangular head slides into the next limit slot, the setting of the next gear position can be completed, and the action process is the same as described above.

[0013] When unlocking is required to restore the flat state of the panel, the first panel needs to be rotated in the same direction to make the triangular head slide into the unlocking slot inclined below all the limit slots. When the triangular head slides into the unlocking slot, the ejector rod will be pushed into the position farthest from the limit portion, and the inclined surface of the triangular head will contact and slide with the inclined surface of the unlocking slot. During the downward pressing and rotating process, the triangular head will rotate radially, and the rotation direction is consistent with the bending direction of the unlocking slot. At this time, the positioning block on the ejector rod will slide into the bending section of the bending positioning slot, thereby ensuring that the ejector rod can rotate smoothly; then the first panel is folded in the opposite direction to perform the unlocking action. The triangular head will slide out of the unlocking slot. Since the ejector rod has been pushed into the position farthest from the limit portion, it will not quickly slide back into the several limit slots above the unlocking slot under the drive of the power components such as the spring, that is, during the rebound process, until the panel is restored to be flush, the triangular head just rebounds into place and engages in the initial limit slot (farthest from the second panel), and the unlocking is completed at this time.

[0014] In summary, the direct engaging components of the multi-stage adjustable armrest locking structure are the triangular head, the limit groove and the unlocking groove, and the number of parts is small; and this sliding form has low requirements on the precision of the components, which is conducive to enhancing the reliability of the overall structure.

[0015] As a preferred embodiment of the present invention, the block further includes an initial limiting top plate, and the initial limiting top plate is located on the outer side of the limiting groove farthest from the first panel.

[0016] Therefore, the initial limit top plate is located on the outside of the limit slot farthest from the first panel. When the triangular jack slides into the uppermost limit slot, in order to prevent it from sliding too far and falling out of the limit slot, a special initial limit top plate is provided to ensure that its initial position remains unchanged by directly contacting the triangular jack.

[0017] As a preferred embodiment of the present invention, the triangular head includes an upper limit surface for contacting the initial limit top plate, a lower torsion surface for contacting the unlocking groove and generating a torsional force, and a top sliding surface for contacting the sliding contact surface.

[0018] Therefore, the upper limit surface is the surface used to interfere with the initial limit top plate, the lower torsion surface is inclined to interfere with the unlocking groove, and is used to generate torsional force during relative sliding and force the triangular head to drive the top rod to rotate, and the top sliding surface can be set to an arc shape to facilitate the interference with the inner surface of the limit groove so that the two can slide smoothly.

[0019] As a preferred embodiment of the present invention, the upper limit surface is parallel to the first panel; and a spatial angle exists between the lower torsion surface and the first panel.

[0020] Therefore, it can be seen that the lower torsion surface is set inclined, and the upper limit surface is set parallel to the first panel. When the triangular head is located in any limit groove, due to the angle limitation, it can only slide freely in the direction of the inclined lower torsion surface, and cannot slide freely in the direction of the upper limit surface, thereby ensuring the one-way self-locking and one-way sliding capabilities in each gear position.

[0021] As a preferred embodiment of the present invention, the block further includes an unlocking base for providing an opening position for the unlocking groove, and the unlocking base is connected to the first panel; the unlocking groove and the limiting groove are located on different vertical projection planes.

[0022] An unlocking base is arranged on the first panel, which is used to provide an opening position for the unlocking slot. Multiple limit slots are located above the unlocking base. When the triangular head slides out from a limit slot at the lower left and slides toward the unlocking slot, since the unlocking slot and the limit slot are located on different vertical projection planes, when the triangular head is separated from the unlocking slot, it will not directly slide into the lowest limit slot, but will gradually rebound under the action of the elastic element, thereby ensuring that the first panel can be successfully rotated to a position flush with the second panel.

[0023] As a preferred embodiment of the present invention, the unlocking groove includes a first unlocking surface for contacting the lower torsion surface and a second unlocking surface for contacting the top sliding surface.

[0024] The first unlocking surface is used to resist the lower torsion surface and force the lower torsion surface to rotate, and the second unlocking surface is used to resist the top sliding surface to force the triangular head to move, so that the lower torsion surface can successfully and continuously slide on the first unlocking surface. Only when the above two surfaces cooperate with each other can the triangular head completely move in two different directions of retreat and twisting.

[0025] As a preferred embodiment of the present invention, the first unlocking surface is a curved surface.

[0026] The first unlocking surface is an arc-shaped surface, which can ensure the continuous and smooth sliding of the lower torsion surface, thereby improving the user's feel during the actual unlocking operation and improving the usability of the entire structure.

[0027] As a preferred embodiment of the present invention, the multi-stage adjustable armrest locking structure also includes a rotating structure, which includes a first rotating member fixed on the first panel and a second rotating member rotatably connected to the first rotating member and fixed on the second panel.

[0028] The first rotating member is fixed on the first panel, and the second rotating member is fixed on the second panel, and the two are rotationally connected, and the connection form can be hinged or gear rotationally connected, thereby ensuring the structural connection between the first panel and the second panel.

[0029] As a preferred embodiment of the present invention, a reset spring for pushing the ejector rod to reset is also provided in the base.

[0030] The return spring is installed in the accommodating cavity of the base. It can be sleeved on the push rod or connected to the end of the push rod to push the push rod back so that the triangular push head can return to its initial position to prepare for the next gear adjustment.

[0031] As a preferred embodiment of the present invention, a plurality of mounting holes for fixing the top-fitting portion, the limiting portion and the rotating structure are provided on the panel.

[0032] Therefore, by providing multiple mounting holes on the panel, the top-fitting part, the limiting part and the rotating structure can be simply and firmly installed on the first panel and the second panel, which is convenient for adjusting the spacing between the top-fitting part and the limiting part according to armrests of different sizes, thereby reducing the production mold cost.

[0033] In summary, the utility model has the following beneficial effects:

[0034] 1. The gear switching operation direction of the multi-stage adjustable armrest locking structure is the same as the direction of the unlocking operation, which is in line with daily operating habits and has a low learning cost. The gear-adjustable armrest structure manufactured based on this is more ergonomic.

[0035] 2. The direct engaging parts of the multi-stage adjustable armrest locking structure are a triangular head, a limit groove and an unlocking groove, and the number of parts is small; and this sliding form has low requirements on the precision of the parts, which is conducive to enhancing the reliability of the overall structure.

[0036] 3. This multi-stage adjustable armrest locking structure can achieve the functions of multi-stage adjustment and self-unlocking through the cooperation of simple mechanical locking parts, and has the advantages of loose clearance matching requirements and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the locking structure of the multi-stage adjustable armrest;

[0038] Figure 2 This is a schematic diagram of locking in the first gear;

[0039] Figure 3 This is a schematic diagram of locking in the second gear;

[0040] Figure 4 It is a schematic diagram of the combination of the triangular mandrel and the mandrel;

[0041] Figure 5 is a schematic diagram of a limiting portion;

[0042] Figure 6 Schematic diagram of a top view of the locking structure of the multi-stage adjustable armrest;

[0043] Figure 7 This is a schematic diagram of locking in the third gear;

[0044] Figure 8 This is a schematic diagram of the upper side view in the unlocked gear position;

[0045] Fig. 9 This is a schematic diagram of the lower side view in the unlocked gear position.

[0046] In the figure: panel 1, first panel 11, second panel 12, top joint part 2, base 21, triangular head 22, upper limit surface 221, lower torsion surface 222, top sliding surface 223, top rod 23, positioning block 24, limiting part 3, block body 31, initial limiting top plate 311, unlocking base 312, limiting groove 32, unlocking groove 33, first unlocking surface 331, second unlocking surface 332, bending positioning groove 4, rotating structure 5, first rotating member 51, second rotating member 52, mounting hole 6. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Anyone can implement the present disclosure in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship remains unchanged after the connection. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. "Sliding connection" means that the two components are connected to each other and can slide relative to each other after the connection. Among them, the two components are integrated to obtain an integrated structure through an one-piece molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through reprocessing (such as bonding, welding, snap connection, screw connection).

[0049] like Figure 1 and Figure 2As shown, the first panel 11 and the second panel 12 are connected by a rotating structure 5, wherein the first rotating member 51 is fixed on the first panel 11, and the second rotating member 52 is fixed on the second panel 12, and the two are connected in rotation, and the connection form can be hinged or gear-connected. The top-joining portion 2 is arranged on the first panel 11, and the limiting portion 3 is arranged on the second panel 12. When the first panel 11 and the second panel 12 are folded over each other, they will each drive the top-joining portion 2 and the limiting portion 3 thereon to perform spatial rotation displacement.

[0050] like Figure 3 , Figure 4 and Figure 5 As shown, the limiting part 3 includes a block 31 and a plurality of limiting grooves 32 and an unlocking groove 33 provided on the block 31. The plurality of limiting grooves 32 are sequentially arranged in a direction perpendicular to the second panel 12 to form a locking basis for multiple gears. An unlocking groove 33 is also provided in a direction close to the second panel 12. The unlocking groove 33 is inclined to cooperate with the triangular head 22. The block 31 includes an initial limiting top plate 311, which is located outside a limiting groove 32 farthest from the first panel 11.

[0051] The top-joining part 2 includes a base 21, in which a top rod 23 capable of forward and backward and rotational displacement is arranged. The top rod 23 is fixedly connected to a triangular head 22 at one end close to the limiting part 3. The triangular head 22 includes an upper limit surface 221 for contacting the initial limiting top plate 311, a lower torsion surface 222 for contacting the unlocking groove 33 and generating a torsion force, and a top sliding surface 223 for contacting the sliding contact surface. The upper limit surface 221 is parallel to the first panel 11 and is used for contacting the initial limiting top plate 311; there is a spatial angle between the lower torsion surface 222 and the first panel 11, which is used for contacting the unlocking groove 33, and for generating a torsion force in relative sliding and forcing the triangular head 22 to drive the top rod 23 to rotate. The top sliding surface 223 can be set to an arc shape to facilitate contacting the inner surface of the limiting groove 32 so that the two can slide smoothly. When the triangular head 22 is located in any limiting groove 32, due to the angle limitation, it can only slide freely in the direction of the inclined lower torsion surface 222, but cannot slide freely in the direction of the upper limit surface 221, thereby ensuring the one-way self-locking and one-way sliding capabilities in each gear.

[0052] The forward and backward displacement capability of the push rod 23 can come from a return spring, which is installed in the accommodating cavity of the base 21. The return spring can be sleeved on the push rod 23 or connected to the end of the push rod 23 to push the push rod 23 to rebound, so that the triangular push head 22 can return to its initial position to prepare for the next gear adjustment.

[0053] The rotation displacement capability of the ejector rod 23 comes from the radial torque generated by the mutual extrusion between the triangular ejector head 22 and the tilted unlocking groove 33. A positioning block 24 is vertically connected to the ejector rod 23, and a bending positioning groove 4 is provided on the base 21. The positioning block 24 can slide in the bending positioning groove 4. When it is located at different positions, a specific clamping effect can be achieved. The bending positioning groove 4 can preferably be a right-angle groove.

[0054] like Figure 6 As shown, a plurality of mounting holes 6 are provided on the panel 1, which can simply and firmly mount the top-fitting portion 2, the limiting portion 3 and the rotating structure 4 on the first panel 11 and the second panel 12, so as to facilitate targeted adjustment of the spacing between the top-fitting portion 2 and the limiting portion 3 for armrests of different sizes, thereby reducing the production mold cost.

[0055] like Figure 7 As shown, in the third gear, the lower torsion surface 222 is tightly attached to the upper surface of the unlocking base 312 , and the top sliding surface 223 abuts against the third limiting groove 32 .

[0056] like Figure 8 and Fig. 9 As shown, when in the unlocking position, the lower torsion surface 222 of the triangular head 22 abuts against the first unlocking surface 331, and the top sliding surface 223 abuts against the second unlocking surface 332. When the first panel 11 or the second panel 12 is reversely oscillated, the triangular head 22 will be drawn out of the unlocking groove 33. Since the unlocking groove 33 and the limiting groove 32 are located on different vertical projection planes, when the triangular head 22 is separated from the unlocking groove 33, it will not directly slide into the lowest limiting groove 32, but will gradually rebound under the action of the reset spring, ensuring that the first panel 11 can be successfully rotated to a position flush with the second panel 12, until the upper limit surface 221 of the triangular head 22 abuts against the initial limiting top plate 311. At this time, the triangular head 22 is in the first gear, that is, the horizontal initial gear. Unlocking is completed and preparations are made for the next gear adjustment and locking.

[0057] In addition, if Figure 1 and Figure 2 As shown, the top part 2, the limiting part 3, the first rotating part 51 and the second rotating part 52 can be detachably installed on the first panel 11 and the second panel 12 by means of the mounting holes 6 and the connecting bolts; they can also be obtained by one-piece processing by factory casting or the like. The former is convenient for mass production and transportation, and the latter has higher strength and is suitable for specific demand scenarios.

[0058] The multi-stage adjustable armrest locking structure is placed in the armrest structure, and the two panels are respectively connected to the fixed armrest member and the adjustable armrest member of the armrest structure, thereby realizing the multi-stage locking adjustment function of the armrest.

[0059] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. The structural member materials, sizes, shapes, etc. mentioned in the embodiments of the present application are all schematic descriptions and do not constitute strict or absolute limitations. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A multi-level adjustable armrest locking structure, comprising a panel (1), wherein the panel (1) comprises a first panel (11) and a second panel (12) hinged to each other, characterized in that: It also comprises a top-fitting portion (2) arranged on the first panel (11) and a limiting portion (3) arranged on the second panel (12); the limiting portion (3) comprises a block (31) and a plurality of limiting grooves (32) and an unlocking groove (33) arranged on the block (31), and the unlocking groove (33) is arranged obliquely; the top-fitting portion (2) comprises a base (21), a triangular head (22), a top rod (23) installed in the base (21) and connected to the triangular head (22), and a positioning block (24) vertically connected to the top rod (23); a bending positioning groove (4) is arranged on the base (21); and the positioning block (24) slides in the bending positioning groove (4).

2. The multi-level adjustable armrest locking structure according to claim 1, characterized in that: The block (31) further comprises an initial limiting top plate (311), wherein the initial limiting top plate (311) is located on the outer side of the limiting groove (32) farthest from the first panel (11).

3. The multi-level adjustable armrest locking structure according to claim 2, characterized in that: The triangular head (22) comprises an upper limit surface (221) for contacting the initial limit top plate (311), a lower torsion surface (222) for contacting the unlocking groove (33) and generating a torsion force, and a top sliding surface (223) for contacting the limit groove (32).

4. The multi-level adjustable armrest locking structure according to claim 3, characterized in that: The upper limit surface (221) and the first panel (11) are parallel to each other; and a spatial angle exists between the lower torsion surface (222) and the first panel (11).

5. The multi-level adjustable armrest locking structure according to claim 4, characterized in that: The block (31) further comprises an unlocking base (312) for providing an opening position for the unlocking groove (33), and the unlocking base (312) is connected to the first panel (11); the unlocking groove (33) and the limiting groove (32) are located on different vertical projection planes.

6. The multi-level adjustable armrest locking structure according to claim 4, characterized in that: The unlocking groove (33) comprises a first unlocking surface (331) for contacting the lower torsion surface (222) and a second unlocking surface (332) for contacting the top sliding surface (223).

7. The multi-level adjustable armrest locking structure according to claim 6, characterized in that: The first unlocking surface (331) is an arc-shaped surface.

8. The multi-level adjustable armrest locking structure according to claim 1, characterized in that: The multi-stage adjustable armrest locking structure also comprises a rotating structure (5), wherein the rotating structure (5) comprises a first rotating member (51) fixed on the first panel (11) and a second rotating member (52) rotatably connected to the first rotating member (51) and fixed on the second panel (12).

9. The multi-level adjustable armrest locking structure according to claim 7, characterized in that: The base (21) is also provided with a return spring for pushing the push rod (23) to return to its original position.

10. The multi-level adjustable armrest locking structure according to claim 8, characterized in that: The panel (1) is provided with a plurality of mounting holes (6) for fixing the top-joining portion (2), the limiting portion (3) and the rotating structure (5).

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