Needle type hinge for door closing driven by spring

Abstract

The utility model discloses a pin type hinge for door closing driven by a spring, which comprises a fixed component and a movable component, the fixed component comprises a hinge arm, and the hinge arm is hinged with the movable component through a hinge shaft; the door closing assembly comprises a spring, a push rod and a cam, the cam and the hinge arm are oppositely positioned, the cam sleeves the hinge shaft, one end of the push rod is attached to and connected with the cam through the elastic restoring force of the spring, the movable assembly comprises a mounting seat, the push rod is slidably connected to the mounting seat, and a first convex shell is formed on one side of the mounting seat; the door closing device further comprises a damper, the damper is arranged in the first convex shell, the fixing assembly is provided with a squeezing and pushing part used for driving the damper to longitudinally retract at the door closing tail section, the damper can make contact with the squeezing and pushing part, and the damper and the push rod are located on the same side of the installation base. The needle type hinge for door closing driven by the spring is wide in application range.

Description

Technical Field

[0001] The utility model relates to the field of hinges for furniture, and particularly to a pin hinge driven by a spring to close the door. Background Art

[0002] At present, the existing pin hinge is a furniture hinge with a needle-shaped hinge axis. The fixed component of the pin hinge is arranged on the cabinet body, and the movable component of the pin hinge is embedded on the outer side of the door frame of the door body. The door frame is usually made of aluminum profiles. The fixed component and the movable component are hinged through the hinge axis of the pin hinge. The existing pin hinge is provided with a buffer. For example, the "pin hinge with a cam-type door-closing structure" disclosed in the Chinese utility model patent with the publication number CN219887840U has a movable component, and a damper (i.e., a buffer) is installed on the mounting seat of the movable component. The damper is arranged at the corresponding position of the avoidance notch. When closing the door leaf, the piston rod of the damper collides with the inner side surface of the hinge arm, so as to play a role in buffering the closing of the door; the telescopic direction of the piston rod of the damper is generally along the swing tangent direction of the movable component, and the hinge arm blocks the piston rod of the damper generally in the swing tangent direction of the movable component; when the movable component is in the position corresponding to the closing of the door leaf, one side of the movable component abuts against the hinge arm, so that the piston rod can be pushed inwards relatively by the hinge arm. For the combination form of the existing pin hinge and the door leaf, when the door leaf is in the closed position, it is generally perpendicular to the hinge arm. That is to say, the other side corresponding to the movable component of the door leaf is connected, so the axis direction of the damper is generally parallel to the door leaf. That is to say, the telescopic direction of the piston rod of the damper is in the horizontal plane, and the telescopic direction of the piston rod of the damper is along the transverse direction of the door leaf, so that the axis direction of the damper is generally parallel to the width direction of the door frame (in the visual field facing the door leaf). However, the door frames of some door bodies are relatively narrow, and the damper includes a cylinder body and a piston rod, and a part of the piston rod extends out of the cylinder body. Therefore, the total length of the damper is relatively large, resulting in that the movable component cannot be embedded and installed in the relatively narrow door frame, and the applicable range of the pin hinge is small. Therefore, it is necessary to improve the existing pin hinge. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the existing technology and provide a pin hinge driven by a spring to close the door, which has a wider applicable range.

[0004] The purpose of the utility model is realized by the following technical solutions.

[0005] The pin hinge driven by a spring to close the door disclosed by the present utility model includes a fixed component and a movable component. The fixed component includes a hinge arm, and the hinge arm is hinged to the movable component through a hinge shaft. Among them, a door closing component is further included. The door closing component includes a spring, a push rod and a cam. The cam is relatively positioned with the hinge arm. The cam is sleeved on the hinge shaft. One end of the push rod is abutted and connected to the cam by the elastic restoring force of the spring. The movable component includes a mounting seat. The push rod is slidably connected to the mounting seat. A first convex shell is formed on one side of the mounting seat. A damper is further included. The damper is arranged in the first convex shell. The fixed component is provided with a pushing part for relatively driving the damper to longitudinally retract and move at the end stage of closing the door. The damper can contact the pushing part. The damper and the push rod are located on the same side of the mounting seat.

[0006] Preferably, the damper includes a longitudinally telescopic piston rod and a cylinder body. The cylinder body is slidably arranged in the first convex shell, and the tail end of the cylinder body protrudes out of the first convex shell.

[0007] Preferably, a second convex shell is formed on one side of the mounting seat. One end of the second convex shell is closed. The spring is arranged in the second convex shell. The push rod is slidably arranged in the second convex shell. One end of the push rod penetrates through the corresponding other end of the second convex shell.

[0008] Preferably, a first avoidance concave position for the first convex shell to swing into and a second avoidance concave position for the second convex shell to swing into are formed on the hinge arm.

[0009] Preferably, the pushing part is covered with a wear-resistant sheet.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging the damper in the first convex shell, and the fixed component is provided with a pushing part for relatively driving the damper to longitudinally retract and move at the end stage of closing the door, the damper can contact the pushing part, and the damper and the push rod are located on the same side of the mounting seat, which is beneficial to expanding the application range of the pin hinge of the present utility model. Description of the Drawings

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the pin hinge of the present utility model.

[0012] Figure 2 It is a three-dimensional structural schematic diagram of the combination of the pin hinge of the present utility model with a door frame and a door panel.

[0013] Figure 3 It is a cross-sectional structural schematic diagram in the top view direction of the pin hinge of the present utility model at the position of the damper.

[0014] Figure 4This is a schematic cross-sectional view of the pin hinge of the present utility model in the top-down direction at the position of the push rod.

[0015] Figure 5 This is a front three-dimensional structural schematic diagram of the movable component of the present utility model.

[0016] Figure 6 This is a rear exploded schematic diagram of the movable component of the present utility model.

[0017] Label description: Fixed component 1; hinge arm 11; extrusion and push part 12; first avoidance concave position 111; second avoidance concave position 112; hinge shaft 2; cam 21; movable component 3; mounting seat 31; mounting opening 3101; first convex shell 311; second convex shell 312; push rod 32; spring 33; damper 34; longitudinally telescopic piston rod 341; cylinder block 342; tail end 3421; cover plate 35; door panel 99; door frame 98. Detailed implementation mode

[0018] The present utility model will be further described below with reference to the accompanying drawings.

[0019] The pin hinge of the present utility model, as Figure 1 and Figure 2 shown, includes a fixed component 1 and a movable component 3 for being arranged on a door frame 98. The fixed component 1 includes a hinge arm 11 which is arranged in a forward-extending shape. The hinge arm 11 and the movable component 3 are hinged by a hinge shaft 2. The pin hinge of the present utility model further includes a door-closing component. As Figure 4 shown, the door-closing component includes a spring 33, a push rod 32 and a cam 21. The cam 21 is relatively positioned with the hinge arm 11, that is to say, the cam 21 cannot rotate. The cam 21 is sleeved on the hinge shaft 2. Specifically, a notch is formed at the front end of the hinge arm 11, and the cam 21 is horizontally inserted into the above-mentioned notch, so that the cam 21 cannot move up and down, and a part of the outer periphery of the cam 21 is in planar contact with the plane of the hinge arm 11, thereby preventing the cam 21 from rotating around the hinge shaft 2. As Figure 4 shown, one end of the push rod 32 is abutted and connected to the cam 21 by the elastic restoring force of the spring 33. As Figure 1 shown, the movable component 3 includes a mounting seat 31. The push rod 32 is slidably connected to the mounting seat 31. The sliding direction of the push rod 32 is in a horizontal plane, while the axis of the hinge shaft 2 is perpendicular to the horizontal plane. As Figure 5 shown, a first convex shell 311 is formed on one side of the mounting seat 31. One end of the first convex shell 311 is closed. As Figure 1 and Figure 3 shown, the pin hinge of the present utility model further includes a damper 34, and the damper 34 is arranged in the first convex shell 311.

[0020] As Figure 3As shown, the fixing component 1 is provided with a pushing part 12 which is longitudinally retractable relative to the driving damper 34 at the end stage of closing the door. The damper 34 can contact the pushing part 12. In other words, one end of the damper 34 (in the free state) protrudes from the first convex shell 311, as Figure 3 shown. The damper 34 includes a longitudinally telescopic piston rod 341 and a cylinder block 342. It can be that the longitudinally telescopic piston rod 341 protrudes from the first convex shell 311, or the cylinder block 342 protrudes from the first convex shell 311. The so-called "longitudinally retractable movement of the damper 34" means that the damper 34 retracts into the first convex shell 311. Specifically, it can be that the longitudinally telescopic piston rod 341 retracts into the first convex shell 311, or the cylinder block 342 retracts into the first convex shell 311. As Figure 2 shown, the "longitudinal" in the so-called "longitudinally retractable movement of the damper 34" means that the retracting direction of the damper 34 is substantially perpendicular to the door panel 99 (in other words, the telescopic direction of the longitudinally telescopic piston rod 341 relative to the cylinder block 342 is substantially perpendicular to the door panel 99). And since the damper 34 is located outside the door panel 99, when the axis of the hinge shaft 2 is erected, the cylinder block 342 slides in the horizontal plane.

[0021] As Figure 1 shown, the damper 34 and the push rod 32 are located on the same side of the mounting seat 31. Specifically, as Figure 2 shown, in the horizontal plane, the edge part of the door panel 99 is inserted into one side of the door frame 98, and a concave position is formed on the corresponding other side of the door frame 98. The mounting seat 31 is embedded in the above-mentioned concave position. Thus, both the damper 34 and the push rod 32 are located on the side of the mounting seat 31 facing away from the door panel 99. By integrating the damper 34, the spring 33 and the push rod 32 into the mounting seat 31, it is beneficial to make the external shape structure of the fixing component 1 compact and avoid the need to open a relatively deep concave pit structure for embedding and installing the fixing component 1 on the inner wall of the cabinet.

[0022] As Figure 2 shown, during the process of closing the door, first swing the door panel 99 by hand to make the mounting seat 31 swing in a closing manner relative to the hinge arm 11, as Figure 3As shown, at the end stage of closing the door (i.e., when the door panel 99 is approaching the end of closing), taking the structure where the cylinder block 342 protrudes from the first convex shell 311 as an example, that is, the cylinder block 342 contacts the pushing part 12. Then the pushing part 12 relatively pushes open the cylinder block 342. That is to say, the pushing part 12 gradually radially intrudes into the swinging range of the cylinder block 342 as the cylinder block 342 swings, causing the cylinder block 342 to move longitudinally to extend and retract the piston rod 341. Relatively, it makes the longitudinally extending and retracting piston rod 341 retract into the cylinder block 342. During this process, the damper 34 plays a buffering role to reduce the impact on the door panel 99 and the door frame 98; when the door panel 99 is pulled open by hand, the pushing part 12 relatively disengages from the end 3421 of the cylinder block 342, and the longitudinally extending and retracting piston rod 341 extends relative to the cylinder block 342 through the elastic restoring force of the return spring inside the damper 34, causing the cylinder block 342 to extend and reset relative to the mounting seat 31. Since the pushing part 12 has a pushing effect on the damper 34, in other words, the pushing part 12 has a reaction force on the damper 34 that is generally directed towards the axis of the hinge shaft 2. The pushing part 12 is located outside the swinging range of the mounting seat 31, and the extending and retracting direction of the longitudinally extending and retracting piston rod 341 is also generally directed towards the axis of the hinge shaft 2, enabling the pushing part 12 to relatively push the cylinder block 342 towards the hinge shaft 2 as the cylinder block 342 swings around the hinge shaft 2, allowing the longitudinally extending and retracting piston rod 341 to relatively retract into the cylinder block 342 for movement. As Figure 4 shown, at the end stage of closing the door, the end of the push rod 32 changes from contacting the outer cylindrical surface of the contact cam 21 to contacting the angular edge of the contact cam 21. Then the elastic restoring force of the spring 33 generates a moment on the push rod 32, and this moment drives the door panel 99 to swing in the closing direction, enabling the door panel 99 to complete the closing by itself. The above-mentioned door closing assembly uses the elastic restoring force of the spring 33 as the power for closing the door, which is convenient for obtaining materials and has a lower cost. The working principle of the above-mentioned door closing assembly can refer to the "Needle Hinge with Cam-Type Door Closing Structure" with the Chinese Utility Model Patent Publication No. CN219887840U, so it will not be elaborated here. As Figure 2 shown, since the extending and retracting direction of the longitudinally extending and retracting piston rod 341 relative to the cylinder block 342 is generally perpendicular to the door panel 99, the damper 34 is generally arranged perpendicular to the door panel 99. Compared with the prior art, it can avoid the interference between the damper 34 and the edge of the door panel 99 due to the excessive axial length of the damper 34. In other words, the width of the door frame 98 ( Figure 2 in the case of the width in the left-right direction) can be reduced, and it also enables the needle hinge of the present invention to be applicable to both the occasion where the door frame 98 is wider and the occasion where the door frame 98 is narrower, that is, the applicable range of the needle hinge of the present invention is relatively wide. As Figure 1 and 2As shown, since the damper 34 and the push rod 32 are located on the same side of the mounting seat 31, in other words, to avoid the angular misalignment distribution of the damper 34 and the push rod 32 (with respect to the hinge axis 2), in the horizontal plane, it is beneficial to reduce the thickness dimension of the movable component 3 in the direction parallel to the door panel 99 (and in the horizontal plane), such as Figure 2 As shown, the concave position of the door frame 98 can be set shallower, that is to say, the door frame 98 can be made narrower, and the narrow door frame 98 combined with the glass-made door panel 99 will obtain a better open visual effect.

[0023] Furthermore, as mentioned above, the damper 34 includes a longitudinally telescopic piston rod 341 and a cylinder block 342. The cylinder block 342 is slidably disposed in the first convex shell 311, and the tail end 3421 of the cylinder block 342 protrudes from the first convex shell 311 (the corresponding other end). In other words, the pushing part 12 specifically contacts the tail end 3421 of the cylinder block 342. Specifically, one outer wall of the first convex shell 311 is integrally connected to the main body of the mounting seat 31, and the end of the longitudinally telescopic piston rod 341 abuts and connects to the closed end of the first convex shell 311 mentioned above. By setting the structure of the first convex shell 311, the periphery of the first convex shell 311 can be vacant, which is beneficial to reducing the material used for manufacturing the mounting seat 31. Since the tail end 3421 of the cylinder block 342 is set to contact the pushing part 12 (instead of the longitudinally telescopic piston rod 341 contacting the pushing part 12), it is possible to avoid the longitudinally telescopic piston rod 341 from being subjected to obvious bending moments and prevent the damper 34 from being easily damaged.

[0024] Furthermore, as Figure 3 As shown, the pushing part 12 is covered with a wear-resistant sheet. That is to say, it is actually the wear-resistant sheet that contacts the tail end 3421 of the cylinder block 342. The wear-resistant sheet can be made of brass, nylon or polyoxymethylene. The wear-resistant sheet is preferably made of nylon. The wear-resistant sheet can be bonded to the hinge arm 11, or the wear-resistant sheet and the hinge arm 11 are connected by a snap structure. By setting the wear-resistant sheet, it is possible to avoid the tail end 3421 of the cylinder block 342 and the parts contacting the tail end 3421 from being easily worn. When the wear-resistant sheet is made of plastics such as nylon or polyoxymethylene, the wear-resistant sheet also plays a role in reducing collision noise.

[0025] Furthermore, as Figure 1As shown, a second convex shell 312 is formed on one side of the mounting base 31. One end of the second convex shell 312 is closed. The spring 33 is arranged inside the second convex shell 312. The push rod 32 is slidably arranged inside the second convex shell 312. One end of the push rod 32 penetrates through and is arranged at the corresponding other end of the second convex shell 312. Specifically, the extending direction of the push rod 32 is opposite to the extending direction of the tail end 3421 of the cylinder block 342. The sliding direction of the push rod 32 is parallel to the sliding direction of the cylinder block 342. The number of the second convex shells 312 can be set to two. The first convex shell 311 is arranged between the upper and lower second convex shells 312. In other words, there is a vacant position outside the second convex shell 312, which is beneficial to reducing the material used for manufacturing the mounting base 31.

[0026] As Figure 6 shown, a mounting opening 3101 is formed on the corresponding other side of the mounting base 31 (the side for abutting against the door frame 98 in the horizontal direction). The spring 33 and the push rod 32 are inserted into the second convex shell 312 through the mounting opening 3101. The mounting base 31 is installed with a cover plate 35 by screws, and the cover plate 35 seals the mounting opening 3101.

[0027] Furthermore, as Figure 1 shown, a first avoidance recess 111 for the first convex shell 311 to swing into and a second avoidance recess 112 for the second convex shell 312 to swing into are formed on the hinge arm 11. As Figure 3 shown, at the end stage of the closing stroke of the door panel 99, the first convex shell 311 gradually swings into the first avoidance recess 111, and the second convex shell 312 also gradually swings into the second avoidance recess 112, so that the structure of the pin hinge of the present utility model in the closed state is more compact, reducing the occupied space of the pin hinge.

Claims

1. A pin hinge driven by a spring to close the door, comprising a fixed component (1) and a movable component (3), wherein the fixed component (1) includes a hinge arm (11), and the hinge arm (11) is hinged to the movable component (3) through a hinge shaft (2); characterized in that: It further includes a door closing assembly, the door closing assembly includes a spring (33), a push rod (32) and a cam (21), the cam (21) is relatively positioned with respect to the hinge arm (11), the cam (21) is sleeved on the hinge shaft (2), one end of the push rod (32) is abutted and connected to the cam (21) by the elastic restoring force of the spring (33), the movable assembly (3) includes a mounting seat (31), the push rod (32) is slidably connected to the mounting seat (31), and a first convex shell (311) is formed on one side of the mounting seat (31); it further includes a damper (34), the damper (34) is arranged in the first convex shell (311), the fixed assembly (1) is provided with a pushing portion (12) for relatively driving the damper (34) to longitudinally retract and move at the end of closing the door, the damper (34) can contact the pushing portion (12), and the damper (34) and the push rod (32) are located on the same side of the mounting seat (31).

2. The pin hinge for spring-driven door closing according to claim 1, characterized in that: The damper (34) includes a longitudinally telescopic piston rod (341) and a cylinder block (342), the cylinder block (342) is slidably arranged in the first convex shell (311), and the tail end (3421) of the cylinder block (342) protrudes out of the first convex shell (311).

3. The pin hinge for spring-driven door closing according to claim 2, characterized in that: A second convex shell (312) is formed on one side of the mounting seat (31), one end of the second convex shell (312) is closed, the spring (33) is arranged in the second convex shell (312), the push rod (32) is slidably arranged in the second convex shell (312), and one end of the push rod (32) penetrates through the corresponding other end of the second convex shell (312).

4. The pin hinge for spring-driven door closing according to claim 3, characterized in that: A first avoidance concave position (111) for the first convex shell (311) to swing into and a second avoidance concave position (112) for the second convex shell (312) to swing into are formed on the hinge arm (11).

5. The pin hinge for spring-driven door closing according to claim 2, wherein: The pushing portion (12) is covered with a wear-resistant sheet.

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