A silent hardware box door hinge

Abstract

A silent hardware door hinge comprises a main body provided with a receiving groove, a trigger is hingedly installed in the receiving groove through a hinge shaft, a pulling arm is also installed in the receiving groove, the front end of the pulling arm is hinged with the trigger, and a guide shaft is installed at the rear end of the pulling arm, and both ends of the guide shaft extend into sliding grooves provided in the main body; a locking arm is also hingedly installed on the guide shaft, a locking wheel is rollably installed at the bottom of the locking arm and slides on the end face of the trigger, a connecting shaft is provided at the rear end of the locking arm, and a first roller sleeve is rollably mounted on the connecting shaft. The beneficial effect of the utility model is that the present invention rollably mounts the first roller sleeve on the connecting shaft, and hooks the head of the tension spring on the cylindrical surface of the first roller sleeve to connect with the locking arm. This design ensures that there is no relative displacement between the tension spring and the first roller sleeve during operation, and fundamentally avoids the friction noise between the spring and the first roller sleeve.

Description

Technical Field

[0001] The utility model relates to a hardware hinge, in particular to a silent hardware box door hinge. Background Art

[0002] The hardware door hinges widely used in the market are mainly composed of a main body, hinge shaft, trigger, pull arm, tension spring and other parts. These hinges realize the relative movement between the trigger and the main body through the rotation of the hinge shaft, thereby completing the opening and closing of the door. However, in actual use, this traditional hinge structure has a more obvious problem, that is, during the opening and closing of the door, the connection between the tension spring and the pull arm is prone to relative displacement, thereby generating friction noise. This noise not only affects the user experience, but may also have a negative impact on the overall performance and market competitiveness of the product.

[0003] Specifically, when the hinge is in operation, the tension spring provides the necessary return force to ensure the normal opening and closing of the door. During this process, since the connection between the tension spring and the pull arm is not completely fixed, with repeated opening and closing actions, this connection will produce a small relative sliding. Although the sliding amplitude is small, under frequent use, the cumulative effect is significant, resulting in an increase in the friction between the tension spring and the pull arm, thereby generating friction noise.

[0004] In addition, this friction noise may resonate with the natural frequency of the tension spring in some cases. When the vibration frequency of the tension spring is close to or equal to its natural frequency, the resonance effect will significantly amplify the noise, further increasing the noise level. This phenomenon is particularly obvious in scenes where doors are frequently opened and closed, causing trouble to users. For example, in an office environment or living space, the noise generated by frequently used cabinet doors will seriously affect the quietness and comfort of the environment.

[0005] In order to alleviate this problem, the prior art has attempted to add lubricants or use shock-absorbing materials at the connection between the tension spring and the pull arm. However, these methods can only alleviate the noise problem to a certain extent, and cannot fundamentally solve the friction noise and resonance effect caused by the relative displacement of the tension spring and the pull arm. Lubricants will gradually lose their effectiveness over time, and the service life and effect of shock-absorbing materials also have certain limitations. Therefore, a new technical solution is urgently needed to fundamentally eliminate the friction noise and resonance effect between the tension spring and the pull arm by improving the structural design of the hinge. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a silent hardware door hinge with a simple structure and easy use, which can effectively reduce the friction at the connection between the tension spring and the pull arm through optimized structural design, avoid friction noise and resonance effect, and thus achieve a silent effect of the hinge during the opening and closing process.

[0007] The purpose of the utility model is achieved in the following way: a silent hardware box door hinge, which includes a main body provided with a accommodating groove, a trigger is hingedly installed in the accommodating groove through a hinge shaft, the trigger rotates around the hinge shaft to realize the opening and closing of the hinge, a pulling arm is also installed in the accommodating groove, the front end of the pulling arm is hinged to the trigger, and the rear end of the pulling arm is installed with a guide shaft, and the two ends of the guide shaft extend into the sliding grooves arranged in the main body; a locking arm is also hingedly installed on the guide shaft, a locking wheel is rollingly installed at the bottom of the locking arm and slides on the end face of the trigger, a connecting shaft is arranged at the rear end of the locking arm, and a first roller sleeve is rollingly mounted on the connecting shaft; a tension spring is installed in the accommodating groove, the tail of the tension spring is connected to the main body, and the head of the tension spring is hooked on the cylindrical surface of the first roller sleeve and connected to the locking arm.

[0008] Furthermore, a locking groove is concavely arranged on the end surface of the trigger. After the trigger is closed, the locking wheel is elastically inserted into the locking groove to lock the relative position between the trigger and the main body.

[0009] Furthermore: the cross section of the locking arm is arranged in an "n" shape, and is clamped and connected to the left and right end surfaces of the trigger.

[0010] Furthermore: the cross section of the pulling arm is arranged in an "n" shape, and is clamped and connected to the left and right end surfaces of the trigger, and the locking arm is located inside the pulling arm.

[0011] Furthermore, a hook groove is provided at the tail of the main body, the hook groove is arranged through the rear end surface of the main body, a transverse pin is installed in the hook groove, and the tension spring is hooked on the transverse pin.

[0012] Furthermore: a second roller is sleeved on the transverse pin, and the tension spring hook is on the cylindrical surface of the second roller.

[0013] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0014] 2. The present invention rolls the first roller sleeve onto the connecting shaft, and hooks the head of the tension spring onto the cylindrical surface of the first roller sleeve to connect with the locking arm. This design ensures that there is no relative displacement between the tension spring and the first roller sleeve during operation, thereby fundamentally avoiding friction noise between the spring and the first roller sleeve.

[0015] 3. The head of the tension spring is hooked on the cylindrical surface of the first roller sleeve, so that the tension spring always remains stable when providing the necessary return force, and does not slide relative to the first roller sleeve, thereby greatly reducing friction noise. This structural design effectively improves the silent effect of the hinge.

[0016] 4. Since there is no relative displacement between the tension spring and the first roller sleeve, the resonance phenomenon caused by friction noise is avoided. This not only reduces the noise, but also prevents the resonance effect from amplifying the noise, thereby improving the user experience.

[0017] 5. The tension of the tension spring can not only pull the trigger to close and generate the closing force, but also be applied to the locking arm through the tension of the tension spring, so that the locking wheel on the locking arm slides on the end face of the trigger. When the trigger is closed, the locking wheel elastically snaps into the locking groove, which plays a locking role after the hinge is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the general assembly effect diagram of the utility model structure.

[0019] Figure 2 , 3 This is an assembly drawing of the utility model.

[0020] Figure 4 This is a schematic diagram of the locking arm structure of the utility model.

[0021] Explanation of the reference numerals: 1 - accommodating groove; 10 - connecting shaft; 11 - first roller sleeve; 12 - tension spring; 13 - locking groove; 14 - hook groove; 15 - cross pin; 16 - second roller; 2 - main body; 3 - hinge shaft; 4 - trigger; 5 - pulling arm; 6 - guide shaft; 7 - sliding groove; 8 - locking arm; 9 - locking wheel. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings. A silent hardware door hinge comprises a main body 2 provided with a receiving groove 1, a trigger 4 is hingedly installed in the receiving groove 1 through a hinge shaft 3, and the trigger 4 rotates around the hinge shaft 3 to realize the opening and closing of the hinge, a pulling arm 5 is also installed in the receiving groove 1, the front end of the pulling arm 5 is hinged with the trigger 4, and a guide shaft 6 is installed at the rear end of the pulling arm 5, and both ends of the guide shaft 6 extend into a sliding groove 7 set in the main body 2; a locking arm 8 is also hingedly installed on the guide shaft 6, and a locking wheel 9 is rollably installed at the bottom of the locking arm 8 to slide on the end face of the trigger 4, and a connecting shaft 10 is arranged at the rear end of the locking arm 8, and a first roller sleeve 11 is rollably mounted on the connecting shaft 10; a tension spring 12 is installed in the receiving groove 1, the tail of the tension spring 12 is connected to the main body 2, and the head of the tension spring 12 is hooked on the cylindrical surface of the first roller sleeve 11 and connected to the locking arm 8.

[0023] In one embodiment, the end surface of the trigger 4 is concavely provided with a locking groove 13 . After the trigger 4 is closed, the locking wheel 9 is elastically inserted into the locking groove 13 to lock the relative position between the trigger 4 and the main body 2 .

[0024] In one of the embodiments, the cross section of the locking arm 8 is arranged in an "n" shape, and is clamped and connected to the left and right end surfaces of the trigger 4.

[0025] In one of the embodiments, the cross section of the pulling arm 5 is arranged in an “n” shape, and is clamped and connected to the left and right end surfaces of the trigger 4 , and the locking arm 8 is located inside the pulling arm 5 .

[0026] In one embodiment, a hook groove 14 is provided at the tail of the main body 2 , and the hook groove 14 is arranged to penetrate the rear end surface of the main body 2 . A transverse pin 15 is installed in the hook groove 14 , and the tension spring 12 is hooked on the transverse pin 15 .

[0027] In one embodiment, a second roller is mounted on the transverse pin 15 , and the tension spring is hooked on the cylindrical surface of the second roller 16 .

[0028] Working principle: When the user applies force to open the door, the trigger 4 rotates around the hinge shaft 3, driving the pulling arm 5 to slide in the sliding groove 7 through the guide shaft 6, and the guide shaft drives the locking arm 8 to move, and the locking wheel 9 at the bottom of the locking arm rolls on the end face of the trigger under elastic force.

[0029] The tension spring 12 is stretched during the opening process, but because the head of the tension spring is hooked on the cylindrical surface of the first roller sleeve 11, the tension spring and the first roller sleeve maintain a fixed relationship without relative displacement, thereby avoiding the generation of friction noise. After the tension spring is stretched, elastic energy storage is generated, and the elastic tension is realized on the trigger through the pulling arm, preparing for the automatic closing of the box door.

[0030] When the user closes the door, the trigger 4 rotates in the opposite direction around the hinge shaft 3 under the force of the tension spring, and at the same time, the movable pulling arm 5 slides in the opposite direction in the sliding groove 7 through the guide shaft 6. The tension of the tension spring is transmitted to the trigger through the locking arm and the pulling arm. After the locking arm is subjected to the force, an elastic downward pressure in the direction of the trigger is generated. When the trigger is completely closed, the locking wheel is buckled into the locking groove. It plays a role in locking the hinge after closing, thereby preventing the door using the hinge from automatically opening or leaking after closing.

[0031] It should be noted that: the present invention rolls the first roller sleeve onto the connecting shaft, and hooks the head of the tension spring onto the cylindrical surface of the first roller sleeve to connect with the locking arm. This design ensures that there is no relative displacement between the tension spring and the first roller sleeve during operation, thereby fundamentally avoiding friction noise between the spring and the first roller sleeve.

[0032] In addition, the head of the tension spring is hooked on the cylindrical surface of the first roller sleeve, so that the tension spring always remains stable when providing the necessary return force, and does not slide relative to the first roller sleeve, thereby greatly reducing friction noise. This structural design effectively improves the silent effect of the hinge. Furthermore: since there is no relative displacement between the tension spring and the first roller sleeve, the resonance phenomenon caused by friction noise is avoided. This not only reduces noise, but also prevents the resonance effect from amplifying noise, thereby improving the user experience.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims created by the present invention.

Claims

1. A silent hardware door hinge, comprising a main body (2) provided with a receiving groove (1), wherein a trigger (4) is hingedly mounted in the receiving groove (1) via a hinge shaft (3), and the trigger (4) rotates around the hinge shaft (3) to realize the opening and closing of the hinge, characterized in that: A pulling arm (5) is also installed in the accommodating groove (1), the front end of the pulling arm (5) is hinged to the trigger (4), and the rear end of the pulling arm (5) is installed with a guide shaft (6), and both ends of the guide shaft (6) extend into the sliding groove (7) arranged in the main body (2); a locking arm (8) is also hingedly installed on the guide shaft (6), and a locking wheel (9) is rollably installed at the bottom of the locking arm (8) and slides on the end surface of the trigger (4), and a connecting shaft (10) is arranged at the rear end of the locking arm (8), and a first roller sleeve (11) is rollably mounted on the connecting shaft (10); a tension spring (12) is installed in the accommodating groove (1), the tail of the tension spring (12) is connected to the main body (2), and the head of the tension spring (12) is hooked on the cylindrical surface of the first roller sleeve (11) and connected to the locking arm (8).

2. The silent hardware door hinge according to claim 1, characterized in that: The end surface of the trigger (4) is concavely provided with a locking groove (13); after the trigger (4) is closed, the locking wheel (9) is elastically snapped into the locking groove (13), thereby locking the relative position between the trigger (4) and the main body (2).

3. The silent hardware door hinge according to claim 1, characterized in that: The locking arm (8) has an "N"-shaped cross section and is clamped and connected to the left and right end surfaces of the trigger (4).

4. The silent hardware door hinge according to claim 3 is characterized in that: The cross section of the pulling arm (5) is arranged in an "N" shape, and is clamped and connected to the left and right end surfaces of the trigger (4), and the locking arm (8) is located inside the pulling arm (5).

5. The silent hardware door hinge according to claim 1, characterized in that: A hook groove (14) is provided at the rear of the main body (2). The hook groove (14) is arranged to penetrate the rear end surface of the main body (2). A transverse pin (15) is installed in the hook groove (14), and the tension spring (12) is hooked on the transverse pin (15).

6. The silent hardware door hinge according to claim 5, characterized in that: A second roller is sleeved on the transverse pin (15), and the tension spring hook is on the cylindrical surface of the second roller (16).

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