Hinge

Abstract

The invention provides a hinge which comprises a shell, a cam component, a first piston, a spiral spring and a partition piece, the shell is provided with a cavity, the first piston is arranged in the cavity and can reciprocate in the axial direction of the cavity, the first piston abuts against the cam component, and the spiral spring is arranged in the cavity. The spiral spring is used for providing abutting force for the first piston to abut against the cam component, the partition piece is arranged in the cavity and spaced from the side wall of the cavity so that the partition piece can move in the radial direction relative to the cavity, and the spiral spring abuts against the partition piece so that the partition piece can move in the radial direction relative to the cavity. A ball is arranged between the partition piece and the first piston, and the partition piece abuts against the first piston through the ball. According to the hinge, transmission between the piston and the cam mechanism can be stable, and movement resistance of the piston can be reduced.

Description

Technical Field

[0001] The present invention relates to a hinge, and in particular to a hinge which can stabilize the transmission between a piston and a cam mechanism and reduce the resistance of the piston movement. Background Art

[0002] A hinge can be used to connect a door to the ground and provide a device for buffering the door when it rotates. A hinge is sometimes also called a floor spring. CN202718509U discloses a floor spring comprising a piston 3, a cam 4, and a spring 2. When the cam 4 rotates, the spring 2 undergoes elastic deformation, stretching and contracting. The stretching and contraction of the spring 2 causes the spring 2 to twist and move radially eccentrically. The spring 2 drives the piston 3 to twist together, causing the piston 3 to be unable to align with the cam 4, thereby resulting in poor transmission between the cam 4 and the piston 3. The spring 2 drives the piston to move radially eccentrically, causing the piston 3 to squeeze the inner wall of the cylinder 1, thereby obstructing the movement of the piston 3. Summary of the Invention

[0003] In view of this, it is necessary to provide a hinge that stabilizes the transmission between the piston and the cam mechanism and reduces the resistance to the piston's movement.

[0004] The present invention provides a hinge, comprising:

[0005] a housing, wherein the housing is provided with a cavity;

[0006] Cam components;

[0007] a first piston disposed in the cavity and capable of reciprocating along the axial direction of the cavity, the first piston abutting against the cam component;

[0008] a coil spring, the coil spring being used to provide a holding force for the first piston to abut against the cam component;

[0009] A separator is arranged in the cavity and spaced from the side wall of the cavity so that the separator can move radially relative to the cavity, the coil spring is supported by the separator, a ball is provided between the separator and the first piston, and the separator is supported by the first piston through the ball.

[0010] Furthermore, an annular groove is provided on a side of the separator facing the first piston or a side of the first piston facing the separator, and the ball is provided in the annular groove.

[0011] Furthermore, the cam component includes a rotating shaft and a first cam surface provided on the rotating shaft, and the first piston abuts against the first cam surface.

[0012] Furthermore, the first cam surface is provided with a first positioning surface and a second positioning surface at a different circumferential position. When the first piston abuts against the first positioning surface via the first roller, the rotating shaft is at a first angle. When the first piston abuts against the second positioning surface via the first roller, the rotating shaft is at a second angle.

[0013] The rotating shaft is further provided with a second cam surface;

[0014] The hinge further comprises:

[0015] Second piston;

[0016] A buffer mechanism is connected to the second piston to provide the second piston with a resisting force against the second cam surface, so as to provide a driving force when the shaft rotates from the first angle to the second angle and a damping force when the shaft rotates from the second angle to the first angle.

[0017] Furthermore, the first piston and the second piston are on the same side of the rotating shaft, and the first piston and the second piston are relatively slidable.

[0018] Furthermore, the buffer mechanism includes a connecting rod and a buffer, the connecting rod is connected to the buffer, the connecting rod extends axially along the cavity and passes through the partition, and the buffer is located at an end of the coil spring away from the first piston.

[0019] Furthermore, the first piston has a notch, and the first piston includes a first sliding surface located in the notch and a second sliding surface in sliding contact with the side wall of the cavity, the first sliding surface is parallel to the axis of the first piston, and the second piston is arranged in the notch, and the second piston includes a third sliding surface in contact with the first sliding surface and a fourth sliding surface in sliding contact with the side wall of the cavity.

[0020] Furthermore, the first piston has an inner cavity, which extends along the axis of the first piston and connects to the notch. The connecting rod penetrates the inner cavity and is slidably connected to the first piston, and the second piston abuts against the connecting rod.

[0021] Furthermore, the peripheral contour of the separator is a circular sheet.

[0022] The present invention has the following beneficial effects: when the coil spring is twisted and moves eccentrically, its reverse force will act on the partition, and the partition will rotate and move radially relative to the first piston relying on the ball, and the first piston can reduce the circumferential and radial forces it is subjected to, so that the first piston and the cam component are better attached together and the first piston can slide more smoothly relative to the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0024] Figure 2 for Figure 1 Sectional view.

[0025] Figure 3 for Figure 1 Schematic diagram of part of the structure.

[0026] Figure 4 This is a schematic diagram of the specific structure of the rotating shaft of the present invention. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It will be understood that the drawings are only provided for reference and illustration purposes and are not intended to limit the present invention. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field of the present invention. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] It should also be noted that in the description of the present invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] See also Figure 1-Figure 4 As shown, a specific embodiment of the present invention provides a hinge 100 , which includes a housing 10 , a cam component 20 , a first piston 30 , and a coil spring 40 .

[0031] The housing 10 is provided with a cavity 11, and the cam component 20 is installed near one end of the housing 10. The door can be installed on the cam component 20, and the housing 10 can be installed on the floor.

[0032] The first piston 30 is disposed in the cavity 11 and is capable of reciprocating along the axial direction of the cavity 11. The coil spring 40 is disposed in the cavity 11. The coil spring 40 provides a supporting force for the first piston 30 to abut against the cam member 20. The other end of the coil spring 40 abuts against a fixing plate 12 fixed in the cavity 11.

[0033] See Figure 3 and Figure 4 As shown, the cam component 20 includes a rotating shaft 23 and a first cam surface 21 provided on the rotating shaft 23 , and the first piston 30 abuts against the first cam surface 21 .

[0034] When the cam member 20 rotates, the first piston 30 reciprocates axially within the cavity 11, causing the first piston 30 to compress and release the coil spring 40. This causes the coil spring 40 to twist, causing the first piston 30 to rotate circumferentially. This prevents the first piston 30 from properly contacting the cam member 20, affecting transmission between the two and leading to unstable transmission. Furthermore, the coil spring 40 can move eccentrically, and the eccentric compressive force of the coil spring 40 causes the side surface of the first piston 30 to press against the sidewall of the cavity 11, resulting in poor sliding of the first piston 30 and hindering the rotation of the rotating shaft 23.

[0035] In this regard, in the present invention, combined with Figure 2 and Figure 3As shown, a separator 70 is provided between the first piston 30 and the coil spring 40. The separator 70 is disposed in the cavity 11 and is spaced apart from the sidewall of the cavity 11, with a movable space A between the two, allowing the separator 70 to move radially relative to the cavity 11. A ball bearing 72 is provided between the separator 70 and the first piston 30. The coil spring 40 abuts against the separator 70, and the separator 70 abuts against the first piston 30 via the ball bearing 72. The separator 70 is preferably a sheet with a circular circumferential profile.

[0036] When the coil spring 40 is twisted and moves eccentrically, its reverse force acts on the separator 70. The separator 70, relying on the ball 72, rotates and moves radially relative to the first piston 30. The first piston 30 can reduce the circumferential and radial forces it is subjected to, so that the first piston 30 and the cam component 20 are better attached together and the first piston 30 slides more smoothly relative to the cavity 11.

[0037] An annular groove 71 is provided on the side of the separator 70 facing the first piston 30, and the ball 72 is disposed in the annular groove 71 to facilitate the installation of the ball 72. Alternatively, an annular groove for installing the ball 72 may be provided on the side of the first piston 30 facing the separator 70.

[0038] See Figure 3 As shown, the first piston 30 is provided with a first groove 31 at one end facing the rotating shaft 23. The sidewall of the first groove 31 is arc-shaped. A second groove 32 is provided on the side of the first groove 31 facing away from the rotating shaft 23, communicating with the first groove 31. A vertical plane passing through the axis of the first piston 30 passes through the second groove 32. A first roller 311 is movably disposed in the first groove 31, and a plurality of rollers 321 arranged side by side and in contact with each other are provided in the second groove 32. The plurality of rollers 321 are arranged along the circumferential surface of the first roller 311. Under the action of the coil spring 40, the circumferential surface of the first roller 311 abuts against the first cam surface 21 and the rollers 321, respectively.

[0039] The number of the rollers 321 is 4-6. In the figure, the number of the rollers 321 is 6.

[0040] When the rotating shaft 23 rotates, the first cam surface 21 abuts against the first roller 311 and causes the first roller 311 to rotate. On the one hand, the roller 321 allows the first roller 311 to rotate more smoothly. On the other hand, the roller 321 is located in the second groove 32. The abutting force exerted on the first roller 311 along the axial direction of the first piston 30 can be directly applied to the roller 321. That is, the roller 321 can stably press the first roller 311 against the first cam surface 21, thereby making the force on the first roller 311 more stable.

[0041] The cam component 20 further includes a second cam surface 22 disposed on the rotating shaft 23 . The second cam surface 22 and the first cam surface 21 are located at different positions and angles in the axial direction of the rotating shaft 23 .

[0042] See Figure 4 As shown, the first cam surface 21 includes a first positioning surface 211 and a second positioning surface 212 at a different circumferential position. When the first piston 30 abuts against the first positioning surface 211 through the first roller 311, the rotating shaft 23 is at a first angle (closed or open). When the first piston 30 abuts against the second positioning surface 212 through the first roller 311, the rotating shaft 23 is at a second angle (open or closed). The first angle and the second angle may differ by 90°.

[0043] Preferably, the rotating shaft 23 is closed when it is at a first angle and is open when it is at a second angle. The first cam surface 21 includes two symmetrically arranged second positioning surfaces 212, so that the door can be positioned by different second positioning surfaces 212 when it is opened inward or outward.

[0044] A convex surface 213 is defined between the first positioning surface 211 and the second positioning surface 212 . When the first roller 311 is on the convex surface 213 , it presses the coil spring 40 .

[0045] Two symmetrically arranged second cam surfaces 22 are provided on the rotating shaft 23 . The two second cam surfaces 22 are connected to form a convex tip 221 . The convex tip 221 protrudes from the second positioning surface 211 .

[0046] Continue reading Figure 2 and Figure 3As shown, a second piston 50 and a buffer mechanism 60 are further provided in the cavity 11. The buffer mechanism 60 is connected to the second piston 50 to provide a resisting force to the second piston 50 against the second cam surface 22. The second cam surface 22, the second piston 50, and the buffer mechanism 60 are used to provide a driving force for the rotating shaft 23 from the first angle to the second angle and to provide a damping force for the rotating shaft 23 from the second angle to the first angle.

[0047] The first piston 30 and the second piston 50 are located on the same side of the rotating shaft 23 and can slide relative to each other. This allows the rotating shaft 23 to be as close to one end of the housing 10 as possible. When a door is installed on the rotating shaft 23, the side of the door can be closer to the wall.

[0048] The buffer mechanism 60 includes a connecting rod 61 and a buffer 62 . The connecting rod 61 connects the buffer 62 . The connecting rod 61 extends axially along the cavity 11 and passes through the partition 70 . The buffer 62 is located at one end of the coil spring 40 away from the first piston 30 .

[0049] Specifically, the first groove body 31 and the second groove body 32 have one side facing the second piston 50 that is an open side, and the second piston 50 closes the open side, so that the first roller 311 and the roller 321 are respectively restricted in the first groove body 31 and the second groove body 32 to prevent the two from moving along their respective axial directions. During installation, the first roller 311 and the roller 321 can be placed through the open side, and then the second piston 50 can be installed, which facilitates the installation of the first roller 311 and the roller 321.

[0050] The first piston 30 forms a notch 33 , and includes a first sliding surface 301 located in the notch 33 and a second sliding surface 302 in sliding contact with the side wall of the cavity 11 . The first sliding surface 301 is parallel to the axis of the first piston 30 .

[0051] The second piston 50 is disposed in the notch 33, and its radial cross-sectional shape is substantially identical to that of the notch 33. The second piston 50 includes a third sliding surface 501 that contacts the first sliding surface 301, and a fourth sliding surface 502 that slides against the sidewall of the cavity 11. This allows the cross-sectional dimensions of the cavity 11 to be substantially the same as those of the first piston 30, thereby reducing the height of the hinge 100.

[0052] The first roller 311 and the roller shaft 321 are respectively restricted in the first groove body 31 and the second groove body 32 by the third sliding surface 501 .

[0053] A third groove 51 is formed on a side of the second piston 50 facing the rotating shaft 23 . A second roller 511 is disposed in the third groove 51 . The circumferential side surface of the second roller 511 abuts against the second cam surface 22 .

[0054] The side of the third groove 51 facing the first sliding surface 301 is an open surface, and the bottom surface of the second roller 511 constitutes a part of the third sliding surface 501 , which facilitates the installation of the second roller 511 .

[0055] The first piston 30 has an inner cavity 303, which extends along the axis of the first piston 30 and connects to the notch 33. The connecting rod 61 penetrates the inner cavity 303 and is slidably connected to the first piston 30. The second piston 50 abuts against the connecting rod 61. When the second piston 50 reciprocates, the connecting rod 61 slides relative to the first piston 30, and then the buffer 62 provides damping.

[0056] During installation, the connecting rod 61 is passed through the inner cavity 303 , and then the first piston 30 is assembled in the notch 33 , so as to facilitate the installation and connection between the first piston 30 and the connecting rod 61 .

[0057] In the description and claims of this application, the words "include / comprise" and the words "have / include" and their variations are used to specify the existence of stated features, values, steps or components, but do not exclude the existence or addition of one or more other features, values, steps, components or their combinations.

[0058] Some features of the present invention are described in separate embodiments for clarity of explanation, however, these features may also be described in combination in a single embodiment. Conversely, some features of the present invention are described in a single embodiment for brevity, however, these features may also be described in different embodiments individually or in any suitable combination.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hinge, characterized in that: The hinge comprises: a housing, wherein the housing is provided with a cavity; Cam components; a first piston disposed in the cavity and capable of reciprocating along the axial direction of the cavity, the first piston abutting against the cam component; a coil spring, the coil spring being used to provide a holding force for the first piston to abut against the cam component; A separator is arranged in the cavity and spaced from the side wall of the cavity so that the separator can move radially relative to the cavity, the coil spring is supported by the separator, a ball is provided between the separator and the first piston, and the separator is supported by the first piston through the ball.

2. The hinge according to claim 1, characterized in that An annular groove is provided on one side of the separator facing the first piston or on one side of the first piston facing the separator, and the ball is arranged in the annular groove.

3. The hinge according to claim 1, wherein: The cam component includes a rotating shaft and a first cam surface provided on the rotating shaft, and the first piston abuts against the first cam surface.

4. The hinge according to claim 3, characterized in that The first cam surface is provided with a first positioning surface and a second positioning surface at a different circumferential position. When the first piston abuts against the first positioning surface via the first roller, the rotating shaft is at a first angle. When the first piston abuts against the second positioning surface via the first roller, the rotating shaft is at a second angle. The rotating shaft is further provided with a second cam surface; The hinge further comprises: Second piston; A buffer mechanism is connected to the second piston to provide the second piston with a resisting force against the second cam surface, so as to provide a driving force when the shaft rotates from the first angle to the second angle and a damping force when the shaft rotates from the second angle to the first angle.

5. The hinge according to claim 4, characterized in that The first piston and the second piston are located on the same side of the rotating shaft, and the first piston and the second piston are relatively slidable.

6. The hinge according to claim 5, characterized in that The buffer mechanism includes a connecting rod and a buffer. The connecting rod is connected to the buffer. The connecting rod extends axially along the cavity and passes through the partition. The buffer is located at an end of the coil spring away from the first piston.

7. The hinge according to claim 6, characterized in that The first piston has a notch, and the first piston includes a first sliding surface located in the notch and a second sliding surface in sliding contact with the side wall of the cavity, the first sliding surface is parallel to the axis of the first piston, and the second piston is arranged in the notch, and the second piston includes a third sliding surface in contact with the first sliding surface and a fourth sliding surface in sliding contact with the side wall of the cavity.

8. The hinge according to claim 7, wherein: The first piston has an inner cavity, which extends along the axis of the first piston and is connected to the notch. The connecting rod penetrates the inner cavity and is slidably connected to the first piston. The second piston abuts against the connecting rod.

9. The hinge according to claim 1, wherein: The peripheral side profile of the separator is a circular sheet.

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