Hardware hinge of external buffering device

Abstract

A hinge of an external buffer device, comprising a hinge cup and a hinge arm, the hinge cup and the hinge arm are connected through an upper connecting rod and a lower connecting rod, a buffer device is further installed on the hinge cup, the buffer device interacts with the upper connecting rod, and the buffer device buffers the closing speed of the hinge when the hinge is closed; the buffer device comprises a shell fixed on the hinge cup, a guide groove is hollow in the shell, a driving sleeve is movably installed in the guide groove, a damping arm is outwardly extended on a cylindrical surface of the driving sleeve, one end of the driving sleeve is provided with a buffer, one end of the buffer is borne on the driving sleeve, and the other end of the buffer is borne on the hinge cup, and the driving sleeve is axially displaced to compress the buffer to generate damping force. The hinge has the beneficial effects that the damping arm swings towards the inside of the hinge cup, the design makes the buffer process completely carried out in the hinge cup, compared with a traditional external buffer hinge, the buffer protrudes outside the hinge is avoided, and the overall size of the hinge is significantly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a hinge, in particular a hardware hinge with external buffer device. BACKGROUND

[0002] In the fields of furniture, door and window manufacturing, and many others, hinges serve as a fundamental yet crucial mechanical component, responsible for connecting and allowing rotation between two objects. As users demand higher standards of aesthetics and comfort in products, there is an increasing need for functional and visually appealing hinges. In this context, external buffer hinges, which provide a buffer effect during closure, have received widespread attention and application.

[0003] In traditional external buffer hinge designs, the buffer directly interacts with the hinge arm. While this design can provide some buffer effect during closure, it has several obvious shortcomings:

[0004] 1. Large size: Since the buffer needs to directly interact with the hinge arm, it is often placed outside the hinge, which directly leads to an increase in the overall size of the hinge. In today's world where appearance design is increasingly valued, this bulky design not only affects the aesthetics of the product, but also limits its use in applications where installation space is limited.

[0005] 2. Unkempt appearance: The exposure of the buffer not only increases the size of the hinge, but also disrupts the overall lines and aesthetics of the product. Especially in applications where design requirements are high, such as delicate furniture, decorative doors and windows, the exposure of the buffer becomes a flaw in aesthetics, affecting the overall design sense and harmony.

[0006] 3. Limited buffer effect: In existing designs, the performance of the buffer is directly affected by the movement state of the hinge arm. Since the hinge arm's movement may have uneven speed, sudden direction changes, etc., it makes it difficult for the buffer to achieve stable and reliable buffer effect. In the case of rapid closure or accidental impact, the response of the traditional buffer may not be sufficient to effectively absorb the impact force, resulting in a significant reduction in buffer effect.

[0007] 4. Service life issues: Since the buffer directly bears the force from the hinge arm, it may cause excessive wear and tear or damage to the buffer over time, which not only affects the buffer effect, but also may require regular replacement of the buffer, increasing maintenance costs and inconvenience, so it is necessary to make further improvements. SUMMARY

[0008] The invention aims at providing a hardware hinge with external buffer device, which is simple in structure, convenient to use, compact and beautiful in appearance design, and meets the dual requirements of high beauty and high performance for modern furniture and building hardware.

[0009] The invention is achieved in the following way: a hardware hinge with external buffer device, which comprises a hinge cup and a hinge arm, and is connected through an upper connecting rod and a lower connecting rod to form a four-connecting-rod structure, and a buffer device is installed on the hinge cup and interacts with the upper connecting rod to buffer the closing speed of the hinge when the hinge is closed.

[0010] The buffer device comprises a housing fixed on the hinge cup, and a guide groove is hollowed in the housing, and a driving sleeve is movably installed in the guide groove, and a damping arm extends outward from the cylindrical surface of the driving sleeve, and a buffer is installed at one end of the driving sleeve, and the buffer is borne on the driving sleeve at one end and on the hinge cup at the other end, and the driving sleeve is axially displaced to compress the buffer and generate damping force.

[0011] The front end of the damping arm is upwardly curved and provided with a contact head to interact with the upper connecting rod, and when the hinge is closed, the upper connecting rod pushes the damping arm to swing in the direction of the hinge cup through the contact head, thereby pushing the driving sleeve to rotate.

[0012] The rear end of the damping arm is provided with a guide arc surface, and correspondingly, the hinge cup is provided with a pressing arc surface matched with the guide arc surface, and when the hinge is closed, the guide arc surface interacts with the pressing arc surface to push the driving sleeve to axially displace and generate pushing force to compress the buffer.

[0013] The guide arc surface extends obliquely from the side surface of the damping arm to the rear surface, and the included angle A between the guide arc surface and the side surface of the damping arm is 100° to 115°.

[0014] The guide arc surface and the side surface of the damping arm are connected through a circular arc transition surface.

[0015] The hinge cup is provided with a containing area recessed inward from the upper end surface thereof, and the containing area is enclosed by a bottom surface, two side surfaces, a front end surface and a rear end surface, the rear end surface at least comprises a left rear end surface and a right rear end surface, the intersection of the left rear end surface and the right rear end surface extends rearward, so that the left rear end surface and the right rear end surface are distributed in an "eight" shape, and the pressing arc surface is arranged on the right rear end surface.

[0016] The upper end surface of the hinge cup is provided with a recessed positioning groove, and after the housing is fixed on the hinge cup, the driving sleeve is positioned and limited to rotate and axially slide between the positioning groove and the guide groove, and the positioning groove and the pressing arc surface are circularly connected through a pressing transition surface.

[0017] The positioning groove, the extrusion camber and the extrusion transition surface are punched and formed by the cup body material.

[0018] The extrusion camber extends in the direction of the left-low right-high spiral line.

[0019] The bottom of the shell is provided with an elastic buckle, and the cup is provided with a positioning mounting hole correspondingly, and the shell is clamped and mounted in the positioning mounting hole through the elastic buckle.

[0020] The buffer is a self-resetting compression damping type hydraulic damping cylinder.

[0021] The front side of the shell is provided with a clearance groove, and the damping arm extends outward through the clearance groove.

[0022] The beneficial effects of the present application are: 1. simple structure, low production cost, and improved market competitiveness. 2. The swing design of the damping arm to the inside of the cup makes the buffering process completely inside the cup. Compared with traditional external buffering hinges, the buffer protrudes outside the hinge, which significantly reduces the overall size of the hinge. This compact design not only makes the hinge more beautiful and neat, but also facilitates the use of the hinge in various space-limited application scenarios, improving the product's applicability and aesthetics. 3. Since the buffering mechanism is completely built-in the cup, the external buffering hardware hinge of the present application has a more compact structure design, which not only beautifies the appearance of the hinge, but also makes the installation process more convenient. The compact design reduces the space limitations that need to be considered during installation, making the hinge of the present application widely applicable to various doors, windows and furniture, especially in space-limited or appearance-requiring applications. 4. The interaction between the damping arm and the extrusion camber ensures the continuous generation of damping force during the closing process of the hinge, making the closing process of the hinge smoother and slower, avoiding the impact sound and possible damage caused by rapid closing. At the same time, this design realizes complex functions through simple mechanical structure, which not only reduces the number of components, but also reduces the complexity of manufacturing and maintenance. At the same time, this direct force conversion mechanism improves the energy conversion efficiency and reduces energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figures 1-3 The figure is a schematic diagram of the hinge closing process in the present application.

[0024] Figure 4 , 5 The figure is a schematic diagram of the hinge closing process after the hinge hides the hinge arm.

[0025] Figure 6 The figure is a structure assembly drawing of the present application.

[0026] Figure 7 It is a schematic diagram of the hinge cup structure in the application.

[0027] Figure 8 It is a schematic diagram of the driving sleeve structure in the application. DETAILED DESCRIPTION

[0028] The application will be further described in detail below with reference to the drawings. A hardware hinge of an external buffering device comprises a hinge cup 1 and a hinge arm 2, the hinge cup 1 and the hinge arm 2 are hingedly connected through an upper connecting rod 3 and a lower connecting rod 4, and are assembled into a four-connecting-rod structure, characterized in that: a buffering device is further installed on the hinge cup 1, and the buffering device interacts with the upper connecting rod 3 to buffer the closing speed of the hinge when the hinge is closed.

[0029] The buffering device comprises a shell 5 fixed on the hinge cup 1, the shell 5 is internally hollow and provided with a guide groove, a driving sleeve 6 is movably installed in the guide groove, a damping arm 61 extends outward from the cylindrical surface of the driving sleeve 6, one end of the driving sleeve 6 is provided with a buffer 7, one end of the buffer 7 is borne on the driving sleeve 6, and the other end is borne on the hinge cup 1, and the driving sleeve 6 is axially displaced to compress the buffer 7 to generate damping force.

[0030] The front end of the damping arm 61 is upwardly bent and provided with a contact head 62 to interact with the upper connecting rod 3, and when the hinge is closed, the upper connecting rod 3 pushes the damping arm 61 to swing in the direction of the inside of the hinge cup 1 through the contact head 62, so as to push the driving sleeve 6 to rotate.

[0031] The rear end of the damping arm 61 is provided with a guide arc surface 63, and correspondingly, the hinge cup 1 is provided with a pressing arc surface 13 matched with the guide arc surface 63, and when the hinge is closed, the guide arc surface 63 interacts with the pressing arc surface 13 to push the driving sleeve 6 to axially displace, so as to generate a pushing force to compress the buffer 7.

[0032] The guide arc surface 63 is obliquely extended from the side surface of the damping arm 61 to the rear surface, and the included angle A between the guide arc surface 63 and the side surface of the damping arm 61 is 100° to 115°.

[0033] The guide arc surface 63 and the side surface of the damping arm 61 are connected through a circular arc transition surface 64.

[0034] The hinge cup 1 is provided with a containing area 15 recessed inward from the upper end surface thereof, the containing area 15 is enclosed by a bottom surface 151, two side surfaces 152, a front end surface 153 and a rear end surface 154, the rear end surface 154 at least comprises a left rear end surface 1541 and a right rear end surface 1542, the intersection of the left rear end surface 1541 and the right rear end surface 1542 is extended rearward, so that the left rear end surface 1541 and the right rear end surface 1542 are distributed in an “eight” shape, and the pressing arc surface 13 is arranged on the right rear end surface 1542.

[0035] The upper end face of the hinge cup 1 is provided with an inner concave positioning groove 11, after the shell 5 is fixed on the hinge cup 1, the driving sleeve 6 is positioned and limited to rotate and axially slide between the positioning groove 11 and the guide groove; the positioning groove 11 and the extrusion arc surface 13 are connected through the extrusion transition surface 14.

[0036] The positioning groove 11, the extrusion arc surface 13 and the extrusion transition surface 14 are stamped and formed by the hinge cup 1 cup body material.

[0037] The extrusion arc surface 13 is arranged in a left-low right-high spiral line direction.

[0038] The bottom of the shell 5 is provided with an elastic buckle 52, and the hinge cup 1 is provided with a positioning mounting hole 12 correspondingly, and the shell 5 is clamped and mounted in the positioning mounting hole 12 through the elastic buckle 52.

[0039] The buffer 7 is a self-resetting compression damping type hydraulic damping cylinder.

[0040] The front side of the shell 5 is provided with a clearance groove 53, and the damping arm 61 is arranged outward through the clearance groove 53.

[0041] Working principle: the external buffer hardware hinge of the application realizes efficient buffering effect through a unique internal buffering mechanism, while maintaining the compact design and beautiful appearance of the hinge. The following is a detailed description of the working principle:

[0042] The hinge is composed of a main body of a hinge cup 1 and a hinge arm 2, connected by an upper connecting rod 3 and a lower connecting rod 4 to form a stable four-bar linkage. When the hinge is opened and closed, the relative swing between the upper and lower connecting rods and the hinge cup and hinge arm realizes the opening and closing action.

[0043] In order to make the hinge arm have a buffering effect when closing, avoid noise caused by impact due to large closing force, the buffering device integrated in the hinge cup 1 in the case. When the hinge is closed, the upper connecting rod is deflected towards the hinge cup, and the upper connecting rod 3 pushes the damping arm 61 to swing by the contact head 62 towards the inside of the hinge cup 1, thereby pushing the driving sleeve 6 to rotate.

[0044] When the driving sleeve 6 rotates, the rear end of the damping arm 61 is provided with a guide arc surface 63, and the hinge cup 1 is provided with a corresponding extrusion arc surface 13 matched with the guide arc surface 63. When the hinge is closed, the guide arc surface 63 interacts with the extrusion arc surface 13 to push the driving sleeve 6 to axially displace, generating a pushing force to compress the buffer 7. The reaction force generated by the damper generates a resistance force through the damping arm, thereby generating a force to slow down the closing of the hinge.

[0045] Compared with the traditional technology, the damping arm in the case works to the direction of the accommodating area 15 in the hinge cup, and the damping arm is always in the accommodating area and does not protrude outside the hinge body in the buffering or buffering state, so that the effective buffering function is provided without significantly increasing the volume of the hinge. Not only the buffering performance of the hinge is enhanced, but also the space occupation of the hinge is further optimized, so that the product appearance is more delicate and neat.

[0046] Further, the contact head 62 of the damping arm 61 is in contact with the upper connecting rod 3 when the hinge arm is closed, and drives the damping arm to swing inward. This direct interaction reduces the transmission link, and because the distance between the contact head and the upper connecting rod is small when the hinge is opened, the buffering can be involved when the hinge is closed to a large angle, thereby improving the response speed and reliability.

[0047] Further, the swing of the damping arm is converted into the axial displacement of the driving sleeve 6 through the guide arc surface 63 matched with the extrusion arc surface 13 on the hinge cup. This mechanism directly converts the rotary force into the linear motion of the compression damper, which not only improves the energy conversion efficiency, but also reduces the complexity and maintenance requirements of the system. In addition, the extrusion arc surface 13 can be integrally punched during the production of the hinge cup, so that other corresponding matching components are not needed to be made and installed, thereby simplifying the number of parts, improving the production efficiency, and reducing the production cost while realizing the basic function.

[0048] In summary, the design of the external buffering device not only focuses on the compactness and beauty of the structure, but also ingeniously combines the buffering mechanism with the basic function of the hinge, ensuring that the use experience is enhanced without sacrificing the appearance and space economy of the product. This design effectively avoids the problem of large volume and unclean appearance caused by the exposed buffer of the traditional external buffering hinge, and also improves the service life and reliability of the hinge, reduces the maintenance requirements, and meets the dual requirements of high performance and high aesthetics of modern furniture and building hardware.

[0049] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A hardware hinge with an external buffer device, comprising a hinge cup (1) and a hinge arm (2), wherein the hinge cup (1) and the hinge arm (2) are hingedly connected via an upper connecting rod (3) and a lower connecting rod (4) to form a four-link structure, characterized in that: The hinge cup (1) is also provided with a buffer device, which interacts with the upper connecting rod (3) to buffer the closing speed of the hinge when the hinge is closed. The buffer device comprises a shell (5) fixed on the hinge cup (1), a guide groove is provided in the hollow interior of the shell (5), a driving sleeve (6) is movably installed in the guide groove, a damping arm (61) extends outward from the cylindrical surface of the driving sleeve (6), a buffer (7) is installed at one end of the driving sleeve (6), one end of the buffer (7) is supported on the driving sleeve (6), and the other end is supported on the hinge cup (1), and when the driving sleeve (6) is axially displaced, the buffer (7) is compressed to generate a damping force; The front end of the damping arm (61) is bent upward and is provided with a contact head (62) for interacting with the upper connecting rod (3). When the hinge is closed, the upper connecting rod (3) pushes the damping arm (61) toward the inside of the hinge cup (1) through the contact head (62) to swing, thereby pushing the driving sleeve (6) to rotate; The rear end of the damping arm (61) is provided with a guide arc surface (63), and correspondingly, the hinge cup (1) is provided with an extrusion arc surface (13) that cooperates with the guide arc surface (63). When the hinge is closed, the guide arc surface (63) and the extrusion arc surface (13) interact with each other to push the driving sleeve (6) to axially displace, thereby generating a thrust to compress the buffer (7).

2. The hardware hinge with an external buffer device according to claim 1, characterized in that: The guide arc surface (63) is arranged to extend obliquely from the side surface of the damping arm (61) toward the rear thereof, and the angle A between the guide arc surface (63) and the side surface of the damping arm (61) is arranged to be 100° to 115°.

3. The hardware hinge with an external buffer device according to claim 2, characterized in that: The guide arc surface (63) and the side surface of the damping arm (61) are connected via an arc transition surface (64).

4. The hardware hinge with an external buffer device according to claim 1, characterized in that: The hinge cup (1) is provided with a receiving area (15) recessed inwardly from its upper end surface. The receiving area (15) is formed by a bottom surface (151), two side surfaces (152), a front end surface (153) and a rear end surface (154). The rear end surface (154) includes at least a left rear end surface (1541) and a right rear end surface (1542). The intersection of the left rear end surface (1541) and the right rear end surface (1542) is extended backward so that the left rear end surface (1541) and the right rear end surface (1542) are distributed in an "eight" shape. The extrusion arc surface (13) is provided on the right rear end surface (1542).

5. The hardware hinge with an external buffer device according to claim 4, characterized in that: The upper end surface of the hinge cup (1) is provided with an inwardly concave positioning groove (11). After the housing (5) is covered and fixed on the hinge cup (1), the drive sleeve (6) is positioned and restricted to rotate and slide axially between the positioning groove (11) and the guide groove; the positioning groove (11) and the extruded arc surface (13) are connected in an arc shape via an extruded transition surface (14).

6. The hardware hinge with an external buffer device according to claim 5, characterized in that: The positioning groove (11), the extruded arc surface (13) and the extruded transition surface (14) are formed by stamping the cup body material of the hinge cup (1).

7. A hardware hinge with an external buffer device according to claim 1 or 4 or 6 or 6, characterized in that: The extrusion arc surface (13) is extended in a spiral direction with the left side lower and the right side higher.

8. The hardware hinge with an external buffer device according to claim 1 or 5, characterized in that: The bottom of the housing (5) is provided with an elastic buckle (52), and correspondingly, a positioning installation hole (12) is provided on the hinge cup (1), and the housing (5) is mounted in the positioning installation hole (12) by means of the elastic buckle (52).

9. The hardware hinge with an external buffer device according to claim 1, characterized in that: The buffer (7) is a self-resetting compression damping type hydraulic damping cylinder.

10. The hardware hinge with an external buffer device according to claim 1, characterized in that: The front side of the housing (5) is provided with a space-avoiding groove (53), and the damping arm (61) is extended outward through the space-avoiding groove (53).

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