Hinge for furniture

Abstract

The utility model discloses a hinge for furniture. The hinge comprises a first hinge arm, a second hinge arm, a gear, a hinge shaft and a clamping piece which is selectively clamped with or separated from the gear. The first end of the first hinge arm is provided with a first lug and a second lug which are arranged in a spaced mode in the thickness direction of the first hinge arm, and the first end of the second hinge arm and the gear are both located between the first lug and the second lug. The hinge shaft penetrates through the gear and the first end of the second hinge arm, one tail end of the hinge shaft is fixedly connected with the first convex lug, and the other opposite tail end of the hinge shaft is fixedly connected with the second convex lug; the clamping piece is movably assembled at the first end of the second hinge arm and located beside the gear, the center of the gear is provided with a first anti-rotation cavity which is matched with the hinge shaft in a sleeved mode and prevents the hinge shaft from rotating relative to the gear, and the hinge shaft is sleeved with the gear through the first anti-rotation cavity. Therefore, the advantages that positioning is more accurate, gear shifting dislocation is avoided, and synchronism and stress are good are achieved.

Description

Technical Field

[0001] This utility model relates to a type of furniture, and more particularly to a furniture hinge used in, but not limited to, a sofa. Background Technology

[0002] With the continuous development of the economy and the continuous progress of society, people's lives are provided with an increasingly rich variety of material consumer goods, and sofas are one of these many material consumer goods.

[0003] For sofas, hinges are essential for making the headrest angle adjustable. By adjusting the angle of the hinges, the angle of the headrest relative to the backrest can be changed, thus providing the user with a more comfortable experience.

[0004] However, in existing hinges, there are defects such as gear misalignment and positioning errors caused by gear misalignment.

[0005] Therefore, there is an urgent need for a furniture hinge to overcome one or more of the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a hinge for furniture that prevents gear misalignment.

[0007] To achieve the above objectives, the furniture hinge of this utility model includes a first hinge arm, a second hinge arm, a gear, a hinge shaft, and a locking member that selectively engages or disengages from the gear. The first end of the first hinge arm has a first lug and a second lug arranged spaced apart from each other in the thickness direction of the first hinge arm. The first end of the second hinge arm and the gear are both located between the first lug and the second lug. The hinge shaft passes through the gear and the first end of the second hinge arm. The locking member is movably fitted at the first end of the second hinge arm and located beside the gear. One end of the hinge shaft is fixedly connected to the first lug, and the opposite end of the hinge shaft is fixedly connected to the second lug. A first anti-rotation cavity is formed at the center of the gear for the hinge shaft to fit into and prevent the hinge shaft from rotating relative to the gear. The gear is fitted onto the hinge shaft through the first anti-rotation cavity.

[0008] Compared with the prior art, since one end of the hinge shaft is fixedly connected to the first lug and the other end of the hinge shaft is fixedly connected to the second lug, the hinge shaft and the first end of the first hinge arm are fixed together. In addition, the design of "a first anti-rotation cavity is opened at the center of the gear for the hinge shaft to fit and prevent the hinge shaft from rotating relative to the gear, and the gear is sleeved on the hinge shaft with the help of the first anti-rotation cavity" ensures that there is no relative rotation between the gear and the hinge shaft. Therefore, during the process of the first hinge arm and the second hinge arm unfolding relative to each other, the gear rotates synchronously with the hinge shaft to avoid gear misalignment, thus achieving more accurate positioning, synchronization and better force distribution.

[0009] Preferably, both the first lug and the second lug have a second anti-rotation cavity for fitting the end of the hinge shaft and preventing the hinge shaft from rotating relative to the first hinge arm. The first lug and the second lug are each fitted onto the end of the hinge shaft by means of the second anti-rotation cavity.

[0010] Preferably, the first anti-rotation cavity and the second anti-rotation cavity are arranged through each other; the projections of the first anti-rotation cavity and the second anti-rotation cavity in the thickness direction of the first hinge arm are elliptical, rectangular or regular polygonal; the outer contour of the cross-section of the hinge shaft is correspondingly elliptical, rectangular or regular polygonal.

[0011] Preferably, the engaging member extends in the thickness direction of the first hinge arm, the first lug and the second lug limit the engaging member in the thickness direction of the first hinge arm, and the first lug and the second lug also press against the gear in the thickness direction of the first hinge arm.

[0012] Preferably, the furniture hinge of this utility model further includes a first washer, a second washer, a first screw, and a second screw. The first screw passes through the first washer and is threadedly connected to one end of the hinge shaft. The first screw causes the first washer to press against the first lug. The second screw passes through the second washer and is threadedly connected to the other end of the hinge shaft. The second screw causes the second washer to press against the second lug.

[0013] Preferably, the second end of the second hinge arm has a first lug and a second lug arranged spaced apart from each other in the thickness direction of the first hinge arm. The first lug and the second lug have a movable cavity through which the engaging member passes and a clearance cavity for avoiding the gear. The engaging member is placed in both the movable cavities of the first lug and the second lug. The gear is located between the first lug and the second lug and also extends out of the clearance cavity. The first end of the first hinge arm has a limiting structure for pushing the engaging member out of engagement with the gear.

[0014] Preferably, the furniture hinge of this utility model further includes a mounting member fixedly inserted between the first lug and the second lug and located beside the engaging member, and an elastic biasing plate located between the first lug and the second lug and engaging the engaging member with the gear, the elastic biasing plate being assembled to the mounting member and biasing against the engaging member.

[0015] Preferably, the first end of the second hinge arm also has a partition lug located between the first lug and the second lug, the partition lug being arranged separately from the first lug and the second lug, the gears being arranged between the first lug and the partition lug and between the second lug and the partition lug, the gears between the first lug and the partition lug and the gears between the second lug and the partition lug each having a corresponding elastic bias plate; the partition lug has a first matching cavity that matches the movable cavity and a second matching cavity that matches the clearance cavity, the engaging member also passes through the first matching cavity, and the mounting member also passes through the partition lug.

[0016] Preferably, the gear between the first lug and the partition lug extends from the clearance cavity of the first lug and toward the first lug, and the gear between the second lug and the partition lug extends from the clearance cavity of the second lug and toward the second lug; the gear between the first lug and the partition lug and the gear between the second lug and the partition lug also abut against each other in the second mating cavity.

[0017] Preferably, the first lug protrudes towards the partition lug and presses against the partition lug with a first abutting protrusion, and the second lug protrudes towards the partition lug and presses against the partition lug with a second abutting protrusion. The first abutting protrusion and the second abutting protrusion are both located beside the gear, and the first abutting protrusion and the second abutting protrusion are also aligned with each other in the thickness direction of the first hinge arm. Attached Figure Description

[0018] Figure 1 This is a perspective view of the furniture hinge of this utility model.

[0019] Figure 2 yes Figure 1 An exploded 3D view of the furniture hinge shown.

[0020] Figure 3 yes Figure 2 The diagram shown is a further exploded 3D view of the furniture hinges.

[0021] Figure 4 yes Figure 1 The furniture shown is viewed in a plan view with hinges in the opposite direction of arrow A.

[0022] Figure 5 It is along Figure 4 Internal view of the section cut along the BB line.

[0023] Figure 6 yes Figure 1 The furniture hinge shown is a perspective view with the first hinge arm hidden.

[0024] Figure 7 yes Figure 6 3D exploded view. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0026] Please see Figure 1 , Figure 2 and Figure 5 The furniture hinge 100 of this utility model includes a first hinge arm 10, a second hinge arm 20, a gear 30, a hinge shaft 40, and an engaging member 50 that selectively engages or disengages from the gear 30. Optionally, it is... Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 In this example, the engaging member 50 extends in the thickness direction of the first hinge arm 10; furthermore, the engaging member 50 is a block structure, and a plurality of spaced-apart teeth 51 are provided on the side of the block structure facing the gear 30, as shown in the figure. Figure 3 As shown, this is to ensure reliable engagement between gear 30 and engaging member 50; obviously, depending on actual needs, engaging member 50 can also have other structures, therefore it is not considered... Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The above is the limit.

[0027] The first end 10a of the first hinge arm 10 has a first lug 11 and a second lug 12 arranged spaced apart from each other in the thickness direction of the first hinge arm 10 (see the direction indicated by arrow A and the opposite direction). Optionally, in Figure 2 and Figure 3 In this example, the first lug 11 and the second lug 12 have identical structures and are symmetrical to each other to simplify the manufacturing process of the first lug 11 and the second lug 12. Obviously, depending on actual needs, the structures of the first lug 11 and the second lug 12 can also be made different and / or asymmetrically arranged; therefore, this is not considered... Figure 2 and Figure 3 The above is the limit.

[0028] Both the first end 20a of the second hinge arm 20 and the gear 30 are located between the first lug 11 and the second lug 12. Optionally, at Figures 1 to 3 and Figures 6 to 7 In this example, the second end 20a of the second hinge arm 20 has a first lug 21 and a second lug 22 spaced apart from each other in the thickness direction of the first hinge arm 10, so that the gear 30 can be arranged between the first lug 21 and the second lug 22, thereby making the arrangement between the gear 30 and the first end 20a of the second hinge arm 20 more compact; in addition, the first lug 21 and the second lug 22 have the same structure and are symmetrical to each other, so as to simplify the manufacturing process of the first lug 21 and the second lug 22. Obviously, according to actual needs, the structures of the first lug 21 and the second lug 22 can also be made different and / or asymmetrically arranged, so it is not considered that... Figures 1 to 3 and Figures 6 to 7 The above is the limit.

[0029] The hinge shaft 40 passes through the gear 30 and the first end 20a of the second hinge arm 20. One end of the hinge shaft 40 is fixedly connected to the first lug 11, and the other end of the hinge shaft 40 is fixedly connected to the second lug 12, so as to achieve the purpose of fixing the hinge shaft 40 and the first hinge arm 10 together and rotating synchronously. See the state. Figure 5 As shown.

[0030] A first anti-rotation cavity 31 is provided at the center of the gear 30 for the hinge shaft 40 to fit and prevent the hinge shaft 40 from rotating relative to the gear 30. The gear 30 is fitted onto the hinge shaft 40 by means of the first anti-rotation cavity 31, that is to say, the gear 30 and the hinge shaft 40 cannot rotate relative to each other.

[0031] The engaging member 50 is movably mounted at the first end 20a of the second hinge arm 20. The engaging member 50 is also located beside the gear 30 to meet the need for engaging or disengaging with the gear 30. More specifically, as follows:

[0032] like Figure 6 and Figure 7 As shown, as an example, the furniture hinge 100 of this utility model further includes a mounting member 70 fixedly inserted between the first lug 21 and the second lug 22 and located beside the engaging member 50, and an elastic biasing plate 80 located between the first lug 21 and the second lug 22 and engaging the engaging member 50 with the gear 30. The elastic biasing plate 80 is assembled to the mounting member 70 and biased onto the engaging member 50. Therefore, by means of the elastic biasing plate 80, the engaging member 50 always has a tendency to move closer to the gear 30 and engage with the gear 30; by means of the mounting member 70, the elastic biasing plate 80 can be firmly fixed between the first lug 21 and the second lug 22. Furthermore, Figure 5 , Figure 6 and Figure 7In the example, the first lug 21 and the second lug 22 have movable cavities 211 (221) through which the engaging member 50 passes and clearance cavities 212 (222) for the gear 30. The engaging member 50 is placed in both the movable cavities 211 (221) of the first lug 21 and the second lug 22. The gear 30 is located between the first lug 21 and the second lug 22. The gear 30 also extends out of the clearance cavity 212 (222) to prepare for being clamped by the first lug 11 and the second lug 12. The state is shown in the figure. Figure 5 As shown. Furthermore, in Figure 2 and Figure 3 In this example, the first end 10a of the first hinge arm 10 is provided with a limiting structure 13 for pushing the engaging member 50 out of engagement with the gear 30; therefore, when the first hinge arm 10 needs to return to its original position relative to the second hinge arm 20, the first hinge arm 10 is first allowed to continue unfolding relative to the second hinge arm 20, for example, by continuing along... Figure 4 The clockwise rotation of the first hinge arm 10 unfolds the first hinge arm 10. As the first hinge arm 10 continues to unfold, the limiting structure 13 pushes the engaging member 50 to disengage from the gear 30, thus disengaging the engaging member 50 from the gear 30 and allowing the first hinge arm 10 to return to its original position relative to the second hinge arm 20. During the disengagement of the engaging member 50 from the gear 30, the elastic bias plate 80, due to its elastic deformation, provides a restoring force to the engaging member 50.

[0033] like Figures 1 to 3 and Figures 5 to 7 As shown, as an example, the first end 20a of the second hinge arm 20 also has a separating lug 23 located between the first lug 21 and the second lug 22, the separating lug 23 being arranged separately from the first lug 21 and the second lug 22; gears 30 are respectively arranged between the first lug 21 and the separating lug 23 and between the second lug 22 and the separating lug 23, and each gear 30 between the first lug 21 and the separating lug 23 and between the second lug 22 and the separating lug 23 has a corresponding elasticity. The bias plate 80; the partition lug 23 has a first matching cavity 231 that matches the movable cavity 211 (221) and a second matching cavity 232 that matches the clearance cavity 212 (222); the engaging member 50 is also inserted in the first matching cavity 231, and the mounting member 70 is also inserted in the partition lug 23; this design can increase the number of gears 30 and make the gears 30 arranged in a double layer, thereby achieving a greater overall force on the furniture hinge 100 of this utility model and meeting the needs of sofa joints with greater force. In addition, Figure 5In this example, the gear 30 between the first lug 21 and the separating lug 23 extends from the clearance cavity 212 of the first lug 21 towards the first lug 11, and the gear 30 between the second lug 22 and the separating lug 23 extends from the clearance cavity 222 of the second lug 22 towards the second lug 12, preparing for the first lug 11 and the second lug 12 to jointly clamp the gear 30. Furthermore, in... Figure 5 In this example, the gear 30 between the first lug 21 and the separating lug 23, and the gear 30 between the second lug 22 and the separating lug 23, also abuts in the second mating cavity 232; this design prepares the gear 30 to be held together by the first lug 11 and the second lug 12 to prevent the gear 30 from sliding axially along the hinge shaft 40. Specifically, in Figure 6 and Figure 7 As an example, the first abutment 213 protrudes from the first lug 21 towards the partition lug 23 and presses against the partition lug 23, and the second abutment 223 protrudes from the second lug 22 towards the partition lug 23 and presses against the partition lug 23. The first abutment 213 and the second abutment 223 are both located on the side of the gear 30, and the first abutment 213 and the second abutment 223 are also aligned with each other in the thickness direction of the first hinge arm 10. This design increases the stability and reliability of the first lug 21, the partition lug 23 and the second lug 22.

[0034] like Figure 2 and Figure 3 As shown, as an example, both the first lug 11 and the second lug 12 are provided with a second anti-rotation cavity 111 (121) for the end of the hinge shaft 40 to be fitted and prevent the hinge shaft 40 from rotating relative to the first hinge arm 10. The first lug 11 and the second lug 12 are each fitted onto the end of the hinge shaft 40 by means of the second anti-rotation cavity 111 (121). This design facilitates the installation and removal of the hinge shaft 40 from the first lug 11 and the second lug 12 respectively, and ensures that the hinge shaft 40 cannot rotate relative to the first lug 11 and the second lug 12. Specifically, in Figure 2 and Figure 3 In this example, the first anti-rotation cavity 31 and the second anti-rotation cavity 111 (121) are arranged through each other to simplify the assembly relationship between the hinge shaft 40 and the gear 30, as well as the assembly relationship between the hinge shaft 40 and the first lug 11 and the second lug 12 respectively; the projections of the first anti-rotation cavity 31 and the second anti-rotation cavity 111 (121) in the thickness direction of the first hinge arm 10 are regular hexagons; obviously, depending on actual needs, they can also be elliptical or rectangular, etc., so they are not considered as such. Figure 2 and Figure 3As shown, when the projections of the first anti-rotation cavity 31 and the second anti-rotation cavity 111 (121) onto the thickness direction of the first hinge arm 10 are regular hexagons, the corresponding outer contour of the cross-section of the hinge shaft 40 is a regular hexagon; when the projections of the first anti-rotation cavity 31 and the second anti-rotation cavity 111 (121) onto the thickness direction of the first hinge arm 10 are elliptical, the corresponding outer contour of the cross-section of the hinge shaft 40 is an ellipse; when the projections of the first anti-rotation cavity 31 and the second anti-rotation cavity 111 (121) onto the thickness direction of the first hinge arm 10 are rectangular, the corresponding outer contour of the cross-section of the hinge shaft 40 is a rectangle.

[0035] like Figure 5 As shown, as an example, the first lug 11 and the second lug 12 limit the engaging member 50 in the thickness direction of the first hinge arm 10 to prevent the engaging member 50 from accidentally falling off from the first end 20a of the second hinge arm 20 in the thickness direction of the first hinge arm 10; the first lug 11 and the second lug 12 also press against the gear 30 in the thickness direction of the first hinge arm 10 to prevent the gear 30 from sliding in the axial direction of the hinge shaft 40.

[0036] like Figure 5 and Figure 7 As shown, as an example, the furniture hinge 100 of this utility model also includes a first washer 60a, a second washer 60b, a first screw 60c, and a second screw 60d. The first screw 60c passes through the first washer 60a and is threadedly connected to one end of the hinge shaft 40, causing the first washer 60a to press against the first lug 11; the second screw 60d passes through the second washer 60b and is threadedly connected to the other end of the hinge shaft 40, causing the second washer 60b to press against the second lug 12; this design facilitates the assembly operation of the gear 30, the first hinge arm 10, the second hinge arm 20, and the engaging member 50.

[0037] Compared with the prior art, since one end of the hinge shaft 40 is fixedly connected to the first lug 11 and the other end of the hinge shaft 40 is fixedly connected to the second lug 12, the hinge shaft 40 and the first end 10a of the first hinge arm 10 are fixed together. Combined with the design that "a first anti-rotation cavity 31 is provided at the center of the gear 30 for the hinge shaft 40 to fit and prevent the hinge shaft 40 from rotating relative to the gear 30, and the gear 30 is sleeved on the hinge shaft 40 by means of the first anti-rotation cavity 31", the gear 30 and the hinge shaft 40 will not rotate relative to each other. Therefore, during the process of the first hinge arm 10 and the second hinge arm 10 unfolding relative to each other, the gear 30 rotates synchronously with the hinge shaft 40 to avoid gear misalignment, thus achieving more accurate positioning, better synchronization and force distribution.

[0038] It is worth noting that the aforementioned mounting component 70 is a pin-shaped component; obviously, it can also be other components depending on actual needs, so it is not limited to this. Furthermore, both the first hinge arm 10 and the second hinge arm 20 are double-layered structures.

[0039] The above-disclosed examples are merely preferred embodiments of the present utility model, intended to facilitate understanding and implementation by those skilled in the art. They should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application are still within the scope of the present utility model.

Claims

1. A furniture hinge, comprising a first hinge arm, a second hinge arm, a gear, a hinge shaft, and an engaging member selectively engaging or disengaging from the gear, wherein a first end of the first hinge arm has a first lug and a second lug spaced apart from each other in the thickness direction of the first hinge arm, both the first end of the second hinge arm and the gear are located between the first lug and the second lug, the hinge shaft passes through the gear and the first end of the second hinge arm, and the engaging member is movably fitted to the first end of the second hinge arm and located beside the gear, characterized in that... The gear has a first anti-rotation cavity at its center for fitting the hinge shaft and preventing the hinge shaft from rotating relative to the gear. The gear is fitted onto the hinge shaft through the first anti-rotation cavity. One end of the hinge shaft is fixedly connected to the first lug, and the other end of the hinge shaft is fixedly connected to the second lug.

2. The furniture hinge according to claim 1, characterized in that, The first lug and the second lug are each provided with a second anti-rotation cavity for fitting the end of the hinge shaft and preventing the hinge shaft from rotating relative to the first hinge arm. The first lug and the second lug are each fitted onto the end of the hinge shaft by means of the second anti-rotation cavity.

3. The furniture hinge according to claim 2, characterized in that, The first anti-rotation cavity and the second anti-rotation cavity are arranged through each other; the projections of the first anti-rotation cavity and the second anti-rotation cavity in the thickness direction of the first hinge arm are elliptical, rectangular or regular polygonal; the outer contour of the cross-section of the hinge shaft is correspondingly elliptical, rectangular or regular polygonal.

4. The furniture hinge according to claim 1, characterized in that, The engaging member extends along the thickness direction of the first hinge arm, the first lug and the second lug limit the engaging member along the thickness direction of the first hinge arm, and the first lug and the second lug also press against the gear along the thickness direction of the first hinge arm.

5. The furniture hinge according to claim 1, characterized in that, It also includes a first washer, a second washer, a first screw, and a second screw. The first screw passes through the first washer and is threaded to one end of the hinge shaft. The first screw causes the first washer to press against the first lug. The second screw passes through the second washer and is threaded to the other end of the hinge shaft. The second screw causes the second washer to press against the second lug.

6. The furniture hinge according to claim 1, characterized in that, The second end of the second hinge arm has a first lug and a second lug arranged spaced apart from each other in the thickness direction of the first hinge arm. The first lug and the second lug have a movable cavity through which the engaging member passes and a clearance cavity for avoiding the gear. The engaging member is placed in both the movable cavities of the first lug and the second lug. The gear is located between the first lug and the second lug, and the gear also extends out of the clearance cavity. The first end of the first hinge arm has a limiting structure for pushing the engaging member out of engagement with the gear.

7. The furniture hinge according to claim 6, characterized in that, It also includes a mounting member that is fixedly inserted between the first and second lugs and located beside the engaging member, and an elastic biasing plate located between the first and second lugs and engaging the engaging member with the gear, the elastic biasing plate being assembled to the mounting member and biasing against the engaging member.

8. The furniture hinge according to claim 7, characterized in that, The first end of the second hinge arm also has a partition lug located between the first lug and the second lug. The partition lug is arranged separately from the first lug and the second lug. The gears are arranged between the first lug and the partition lug and between the second lug and the partition lug. The gears between the first lug and the partition lug and between the second lug and the partition lug are respectively equipped with the elastic bias plate. The partition lug is provided with a first matching cavity that matches the movable cavity and a second matching cavity that matches the clearance cavity. The engaging member is also inserted in the first matching cavity, and the mounting member is also inserted in the partition lug.

9. The furniture hinge according to claim 8, characterized in that, The gear between the first lug and the partition lug passes through the clearance cavity of the first lug and extends toward the first lug; the gear between the second lug and the partition lug passes through the clearance cavity of the second lug and extends toward the second lug; the gear between the first lug and the partition lug and the gear between the second lug and the partition lug also abut against each other in the second mating cavity.

10. The furniture hinge according to claim 8, characterized in that, The first lug protrudes towards the direction of the separating lug and presses against the first abutting protrusion on the separating lug. The second lug protrudes towards the direction of the separating lug and presses against the second abutting protrusion on the separating lug. The first abutting protrusion and the second abutting protrusion are both located on the side of the gear. The first abutting protrusion and the second abutting protrusion are also aligned with each other in the thickness direction of the first hinge arm.

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