A two-stage small force angle opening buffer hinge

Abstract

This utility model provides a two-stage, small-angle opening buffer hinge, including a hinge cup, a hinge seat, and a transmission arm assembly hinged between the hinge cup and the hinge seat. The hinge cup is equipped with a buffer assembly, which includes a left buffer cylinder, a right buffer cylinder, and a buffer connecting plate. The buffer connecting plate is mounted on the bottom surface of the hinge cup and slidably connected to it. The left and right buffer cylinders are respectively mounted on the left and right sides of the hinge cup, and their push rods are respectively connected to the front end of the buffer connecting plate. The rear end of the buffer connecting plate has a boss. During opening and closing, the transmission arm assembly rotates around the hinge point while simultaneously slidingly connecting to or separating from the boss, allowing the buffer connecting plate to slide back and forth relative to the hinge cup. This design offers stable operation, extended service life, two-stage opening and closing, small-angle buffering, reduced component usage, simple structure, easy assembly, and expanded usable space for the hinge body.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, specifically a buffer hinge that opens at a small angle with two-stage force. Background Technology

[0002] Hinges are widely used in furniture and appliances. The structure of existing hinges generally includes a hinge cup installed on the door, a hinge seat installed on the cabinet, and a transmission arm assembly that is hinged between the hinge cup and the hinge seat. The transmission arm assembly enables the hinge cup to open and close on the hinge seat, thereby enabling the door to open and close on the cabinet.

[0003] Furthermore, during the closing process, the door can close automatically. Generally, a power source for self-closing is added to the transmission arm assembly. This power source uses a torsion spring, which has a simple structure and realizes the automatic closing function of the hinge.

[0004] However, in actual operation, excessive elastic force often causes the door to collide with the cabinet during closing, generating significant noise, affecting the product's performance, and even damaging the hinges, thus reducing the product's lifespan.

[0005] To address this, existing hinges are equipped with a buffer device. However, this buffer device is typically mounted on the hinge base, resulting in a larger number of transmission and connection components, a more complex structure, increased manufacturing costs, and a larger overall volume. In particular, when the door load is large, a larger buffer device is required, which limits the usable space of the hinge body. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a buffer hinge with two-stage force and small-angle opening, which is stable in operation, extends service life, realizes two-stage opening and closing, achieves small-angle buffering, reduces the use of parts, has a simple structure, is easy to assemble, and expands the usable space of the hinge body.

[0007] The purpose of this invention is achieved as follows: a two-stage force, small-angle opening buffer hinge includes a hinge cup installed on the door body, a hinge seat installed on the cabinet body, and a transmission arm assembly hinged between the hinge cup and the hinge seat. The hinge cup is provided with a buffer assembly for buffering during closing. The buffer assembly includes a left buffer cylinder, a right buffer cylinder, and a buffer connecting plate. The buffer connecting plate is installed on the bottom surface of the hinge cup and slidably connected to it. The left and right buffer cylinders are respectively installed on the left and right sides of the hinge cup, and the push rods of the left and right buffer cylinders are respectively connected to the front end of the buffer connecting plate. The rear end of the buffer connecting plate has a boss. When opening and closing, the transmission arm assembly rotates around the hinge point while slidably connecting to or separating from the boss, so that the buffer connecting plate slides back and forth relative to the hinge cup.

[0008] Based on the above optimization, the buffer assembly also includes a limiting sleeve for restricting the installation position of the left and right buffer cylinders. The limiting sleeve is fastened to the outer bottom of the hinge cup and forms a limiting cavity with the hinge cup for the buffer connecting plate to move back and forth.

[0009] Based on the above optimization, the left and right sides of the limiting sleeve are respectively provided with mounting cavities for fixing and installing the left and right buffer cylinders.

[0010] Based on the above optimization, the front end of the buffer connecting plate is integrally formed with a connecting protrusion that connects to the push rods of the corresponding left and right buffer cylinders.

[0011] Based on the above optimization, the boss is integrally formed at the rear end of the buffer connecting plate, and the hinge cup has a clearance hole for the boss to pass through and extend into the hinge cup cavity.

[0012] Based on the above optimization, the transmission arm assembly includes a hinged arm and a transmission rod. One end of the hinged arm and the transmission rod are hinged to the hinge cup via a U-shaped pin. The other end of the hinged arm and the transmission rod are respectively hinged to the hinge seat via a positioning shaft and a connecting pin. One end of the hinged arm is provided with a push block for sliding connection or sliding separation with the boss as the hinge cup opens and closes.

[0013] Based on the above optimization, the positioning shaft is fitted with a spring for the hinge cup to automatically close in the hinge seat, one elastic end of the spring is connected to the hinge arm, and the swing end of the transmission rod is fitted with a connecting shaft connected to the other elastic end of the spring.

[0014] The advantages of this utility model are:

[0015] 1) By adding a left buffer cylinder and a right buffer cylinder to the hinge cup, the double buffer cylinder works and the double buffering effect makes the hinge operation more stable, suitable for different load doors, and reliable and practical.

[0016] 2) The structure of the buffer connecting plate and the transmission arm assembly is simple. The linkage between the boss of the buffer connecting plate and the hinge arm of the transmission arm assembly improves the stability of the transmission operation. It can activate the left buffer cylinder and the right buffer cylinder when the closed angle is a certain, so as to realize the two-stage opening and closing and achieve small angle buffering.

[0017] 3) Combining the structure of the limiting sleeve, the snap-fit ​​method is adopted to facilitate the assembly of the left and right buffer cylinders. The assembly is convenient, which facilitates production and reduces manufacturing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the present invention in its fully opened state.

[0019] Figure 2This is a cross-sectional view of the preferred embodiment of the present invention in its fully opened state.

[0020] Figure 3 This is a cross-sectional view of the preferred embodiment of the present invention in a closed state of 35-45 degrees.

[0021] Figure 4 This is a cross-sectional view of the preferred embodiment of the present invention in the fully closed state.

[0022] Figure 5 This is an exploded view of the preferred embodiment of the present invention, opened to a 3-5 degree angle.

[0023] Figure 6 This is an exploded view of a preferred embodiment of the present invention.

[0024] Figure 7 This is an exploded view of another preferred embodiment of the present invention. Detailed Implementation

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

[0026] According to the appendix Figures 1 to 7 As shown, the two-stage, small-angle opening buffer hinge of this utility model includes a hinge cup 1 installed on the door body, a hinge seat 2 installed on the cabinet body, and a transmission arm assembly 3 hinged between the hinge cup 1 and the hinge seat 2. The hinge cup 1 is provided with a buffer assembly for buffering during closing, the buffer assembly including a left buffer cylinder 4, a right buffer cylinder 5, and a buffer connecting plate 6. The buffer connecting plate 6 is installed on the bottom surface of the hinge cup 1 and slidably connected to it. The left and right buffer cylinders 4 and 5 are respectively installed on the left and right sides of the hinge cup 1, and their push rods are respectively connected to the front end of the buffer connecting plate 6. The rear end of the buffer connecting plate 6 has a boss 61. During opening and closing, the transmission arm assembly 3 rotates around the hinge point while simultaneously slidingly connecting to or separating from the boss 61, allowing the buffer connecting plate 6 to slide back and forth relative to the hinge cup 1.

[0027] In the optimized scheme, the transmission arm assembly 3 includes a hinge arm 31 and a transmission rod 32. One end of the hinge arm 31 and the transmission rod 32 are hinged to the hinge cup 1 through a U-shaped pin 33. The other end of the hinge arm 31 and the transmission rod 32 are respectively hinged to the hinge seat 2 through a positioning shaft 34 and a connecting pin 35. One end of the hinge arm 31 is provided with a push block 36 for sliding connection or sliding separation with the boss 61 as the hinge cup 1 opens and closes.

[0028] Furthermore, the positioning shaft 34 is fitted with a spring 8 for the hinge cup 1 to automatically close in the hinge seat 2. One elastic end of the spring 8 is connected to the hinge arm 31, and the swing end of the transmission rod 32 is equipped with a connecting shaft 37 connected to the other elastic end of the spring 8.

[0029] That is, when the hinge of this structure begins to close at a certain angle range, such as when the structure is in the 35-45 degree range, the push block 36 at the front end of the hinge arm 31 begins to contact the boss 61 of the buffer connecting plate 6. When the hinge cup 1 continues to close to the fully closed state, the push block 36 is fully connected to the boss 61, and at the same time pushes the buffer connecting plate 6 to move relatively backward, so as to link the left buffer cylinder 4 and the right buffer cylinder 5 to act. During this period, the spring 8 elastically acts on the transmission arm assembly 3 to achieve the purpose of the hinge cup 1 closing slowly and uniformly.

[0030] When the hinge cup 1 opens from the fully closed position to a certain angle range, when the structure is in the ≥5 degree state, the left buffer cylinder 4 and the right buffer cylinder 5, under their own rebound function, always keep their cylinder bodies in contact with the hinge arm 31, and the left buffer cylinder 4 and the right buffer cylinder 5 remain in the working state.

[0031] When fully open, the hinge arm 31 is completely separated from the buffer connecting plate 6, and the left buffer cylinder 4 and the right buffer cylinder 5 are in their initial positions and neither of them is working.

[0032] In this way, the linkage between the boss 61 of the buffer connecting plate 6 and the hinge arm 31 of the transmission arm assembly 3 improves the stability of the transmission operation. It can activate the left buffer cylinder 4 and the right buffer cylinder 5 when closed at a certain angle, so as to realize both two-stage opening and closing and small-angle buffering.

[0033] Reference Figures 1 to 7 As shown, further detailed, the buffer assembly also includes a limiting sleeve 7 for restricting the installation position of the left buffer cylinder 4 and the right buffer cylinder 5. The limiting sleeve 7 is fastened to the outer bottom of the hinge cup 1 and forms a limiting cavity 8 with the hinge cup 1 for the buffer connecting plate 6 to move back and forth.

[0034] Furthermore, the left and right sides of the limiting sleeve 7 are respectively provided with mounting cavities 71 for fixing the left buffer cylinder 4 and the right buffer cylinder 5.

[0035] Combining the structure of the limiting sleeve 7, the snap-fit ​​method facilitates the assembly of the left buffer cylinder 4 and the right buffer cylinder 5, making assembly convenient, production and manufacturing easier, and reducing manufacturing costs.

[0036] Reference Figures 1 to 7 As shown, in further detail, the front end of the buffer connecting plate 6 is integrally formed with a connecting flange 62 that connects to the push rods of the corresponding left buffer cylinder 4 and right buffer cylinder 5.

[0037] Furthermore, the boss 61 is integrally formed at the rear end of the buffer connecting plate 6, and the hinge cup 1 has a clearance hole through which the boss 61 passes and extends into the cavity of the hinge cup 1.

[0038] The linkage between the boss 61 of the buffer connecting plate 6 and the hinge arm 31 of the transmission arm group 3 has a simple structure and improves the stability of transmission operation. It can start the left buffer cylinder 4 and the right buffer cylinder 5 when closed at a certain angle, so as to realize the two-stage opening and closing and achieve small-angle buffering.

[0039] The above specific embodiments are only specific implementations of the present utility model with better effects. Any structure that is the same as or equivalent to the buffer hinge with two-stage force and small angle opening of the present utility model is within the protection scope of the present utility model.

Claims

1. A buffer hinge with two-stage force and small-angle opening, comprising a hinge cup (1) installed on the door body, a hinge seat (2) installed on the cabinet body, and a transmission arm assembly (3) hinged between the hinge cup (1) and the hinge seat (2), characterized in that: The hinge cup (1) is provided with a buffer assembly for buffering function during closing. The buffer assembly includes a left buffer cylinder (4), a right buffer cylinder (5), and a buffer connecting plate (6). The buffer connecting plate (6) is installed on the bottom surface of the hinge cup (1) and is slidably connected to the hinge cup (1). The left buffer cylinder (4) and the right buffer cylinder (5) are respectively installed on the left and right sides of the hinge cup (1), and the push rods of the left buffer cylinder (4) and the right buffer cylinder (5) are respectively connected to the front end of the buffer connecting plate (6). The rear end of the buffer connecting plate (6) is provided with a boss (61). When the transmission arm assembly (3) rotates around the hinge point during opening and closing, it is slidably connected to or slidably separated from the boss (61) so that the buffer connecting plate (6) slides back and forth relative to the hinge cup (1).

2. The buffer hinge with two-stage force and small-angle opening as described in claim 1, characterized in that: The buffer assembly also includes a limiting sleeve (7) for limiting the installation position of the left buffer cylinder (4) and the right buffer cylinder (5). The limiting sleeve (7) is fastened to the outer bottom of the hinge cup (1) and forms a limiting cavity (8) with the hinge cup (1) for the buffer connecting plate (6) to move back and forth.

3. The buffer hinge with two-stage force and small-angle opening as described in claim 2, characterized in that: The limiting sleeve (7) is provided with mounting cavities (71) on the left and right sides respectively for fixing the left buffer cylinder (4) and the right buffer cylinder (5).

4. The cushion hinge of two-stage small force and small angle opening according to claim 1, characterized in that: The front end of the buffer connecting plate (6) is integrally formed with a connecting flange (62) that connects to the push rods of the corresponding left buffer cylinder (4) and right buffer cylinder (5).

5. The cushion hinge of two-stage small force and small angle opening according to claim 1, characterized in that: The boss (61) is integrally formed at the rear end of the buffer connecting plate (6), and the hinge cup (1) has a clearance hole through which the boss (61) passes and extends into the cavity of the hinge cup (1).

6. The snubbing hinge of claim 1, wherein: The transmission arm assembly (3) includes a hinge arm (31) and a transmission rod (32). One end of the hinge arm (31) and the transmission rod (32) are hinged to the hinge cup (1) by a U-shaped pin (33). The other end of the hinge arm (31) and the transmission rod (32) are respectively hinged to the hinge seat (2) by a positioning shaft (34) and a connecting pin (35). One end of the hinge arm (31) is provided with a push block (36) for sliding connection or sliding separation with the boss (61) as the hinge cup (1) opens and closes.

7. The snubbing hinge of claim 6, wherein: The positioning shaft (34) is fitted with a spring (8) for the hinge cup (1) to automatically close in the hinge seat (2). One elastic end of the spring (8) is connected to the hinge arm (31), and the swing end of the transmission rod (32) is fitted with a connecting shaft (37) connected to the other elastic end of the spring (8).

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