Eccentric cam door closer for glass doors

Abstract

To provide an eccentric cam action door closer for a glass door, which can maintain an opened / closed state thereof.SOLUTION: Opening a door clockwise to a prescribed position causes a first roller 410 to fit into a first opening arc groove, resulting in being relatively fixed to an eccentric cam 210. Opening the door counterclockwise to a prescribed position causes a second roller 420 to fit into a second opening arc groove, resulting in being relatively fixed to the eccentric cam 210. Closing the door to a prescribed position causes the first roller 410 to fit into a first closing arc groove and the second roller 420 fits into a second closing arc groove, resulting in being relatively fixed to the eccentric cam 210. This prevents a camshaft from rotating further within a housing 100, positions the door at a prescribed position with respect to an opening / closing angle, and finally stops the door at a prescribed position.SELECTED DRAWING: Figure 2

Description

Technical Field

[0006] , ,

[0001] The present invention relates to the technical field of door closers, and particularly to an eccentric cam door closer for glass doors.

Background Art

[0002] A door closer is a hydraulic device such as a spring provided at the upper part of a door. After the door is opened, it is compressed and released to automatically close the door, having the function of a spring door. After the door is opened, it is ensured that the door can be closed accurately and timely at the initial position.

[0003] During the process of the spring being released, the hydraulic oil in the left chamber of the door closer is compressed and the check valve is closed. The hydraulic oil flows out through the gap between the door closer housing and the plunger, and returns to the right chamber through two flow paths provided with small holes in the plunger and the throttle valve core. Therefore, the hydraulic oil becomes the resistance for the spring to be released, and the cushion effect due to throttling is obtained, and the closing speed of the door is controlled. The throttle valve of the valve body is adjustable, and the closing speed of the door can be variably controlled in different stroke intervals.

[0004] Currently, commercially available door closers can close the door after it is opened, but they cannot maintain the open / closed state, which affects the use.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The purpose of the present invention is to provide an eccentric cam door closer for glass doors, and to solve the technical problem of the conventional door closer that cannot maintain the open / closed state.

Means for Solving the Problems

[0006] To achieve the above objectives, the eccentric cam door closer for glass doors according to an embodiment of the present invention comprises a housing, a camshaft, a valve assembly, and a piston compression assembly. The housing has an internal cavity formed along its axial direction. The camshaft is rotatably supported within the housing, and an eccentric cam, which is synchronously rotatable, is installed on the camshaft. The valve assembly is slidably installed within the lumen and is located to the left of the eccentric cam. The piston compression assembly is slidably mounted within the lumen and is located to the right of the eccentric cam. In the piston compression assembly, a first roller and a second roller are installed at the end closest to the eccentric cam. On the outer circumferential surface of the eccentric cam, a first closed arc-shaped groove and a second closed arc-shaped groove used for closed positioning, and a first open arc-shaped groove and a second open arc-shaped groove used for open positioning are provided. In the closed state, the first roller is fitted into the first closed arc-shaped groove, and the second roller is fitted into the second closed arc-shaped groove. In a fully open state in the clockwise direction, the first roller is fitted into the first open arc-shaped groove. In a fully open state in the counterclockwise direction, the second roller is fitted into the second open arc-shaped groove.

[0007] Preferably, the first roller and the second roller always contact the outer circumferential surface of the eccentric cam regardless of the rotational position of the eccentric cam, thereby suppressing the formation of gaps between the first roller, the second roller and the eccentric cam.

[0008] Preferably, a spring member is installed in the piston compression assembly. The spring member pushes the first roller and the second roller, keeping the first roller and the second roller in flexible contact with the outer circumferential surface of the eccentric cam at all times.

[0009] Preferably, the piston compression assembly further includes a compression piston block slidably provided within the lumen. The spring member is supported at one end by contacting the housing, and at the other end by being inserted into the compression piston block and supported by contacting the compression piston block. In the compression piston block, two fixing pins are provided at a distance from the end closest to the eccentric cam, and the first roller and the second roller are rotatably attached to the two fixing pins, respectively.

[0010] Preferably, the spring member includes an inner spring and an outer spring. The outer spring is fitted over the outside of the inner spring. One end of the outer spring and the inner spring are simultaneously in contact with and supported by the housing, and the other end of the outer spring and the inner spring are simultaneously inserted into the compression piston block and are in contact with and supported by the compression piston block.

[0011] Preferably, the lumen is partitioned by the valve assembly, forming a first oil passage and a second oil passage located on both sides of the valve assembly. The communication between the first and second oil passages is controlled by the valve assembly. A third oil passage is provided within the piston compression assembly, which communicates with the second oil passage.

[0012] Preferably, the valve assembly comprises a valve piston, a valve body, a valve core member, and a core spring. The valve piston is slidably mounted within the lumen. The valve body is mounted inside the valve piston, and valve passages are provided through it that communicate with the first oil passage and the second oil passage, respectively. The valve core member is movably provided within the valve passage and is used to open or close the valve passage. The core spring is housed within the valve passage, with one end connected to the valve body and the other end connected to the valve core member, and biases the valve core member to block the valve passage.

[0013] Preferably, the housing has a first bearing cylinder installed at a position corresponding to the front end of the camshaft, a position limiting mounting seat installed at a position corresponding to the rear end of the camshaft, a second bearing cylinder installed on the position limiting mounting seat, the midpoints of the first bearing cylinder and the second bearing cylinder lie on the same axis, and the camshaft is provided passing through the first bearing cylinder and the second bearing cylinder.

[0014] One or more of the above-described means of the eccentric cam door closer for glass doors according to embodiments of the present invention have at least one of the following technical effects. This eccentric cam door closer for glass doors has a novel structure in which the door body of the door is attached to the housing, and the coordination between the first and second rollers installed in the piston compression assembly and the eccentric cam of the camshaft allows the door closer to stably maintain the open and closed state of the door. When the door is opened clockwise to a predetermined position, the first roller fits into the first open arc groove and is fixed relative to the eccentric cam. When the door is opened counterclockwise to a predetermined position, the second roller fits into the second open arc groove and is fixed relative to the eccentric cam. When the door is closed to a predetermined position, the first roller fits into the first closed arc groove and the second roller fits into the second closed arc groove and is fixed relative to the eccentric cam. This prevents the camshaft from rotating further within the housing, positions it in a predetermined position relative to the door's opening and closing angle, and ultimately stops the door in that position, thereby improving reliability.

[0015] To more clearly illustrate the technical aspects of the embodiments of the present invention, the drawings required in the description of the embodiments or prior art are briefly described below. It is clear that the drawings in the following description represent only a few embodiments of the present invention, and those skilled in the art can obtain other drawings from these drawings without any creative effort. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic diagram showing the internal structure of an eccentric cam door closer for glass doors according to an embodiment of the present invention. [Figure 2] This is a schematic diagram showing the internal structure of an eccentric cam door closer for glass doors according to an embodiment of the present invention. [Figure 3] This is a schematic diagram showing the structure of an eccentric cam according to an embodiment of the present invention. [Figure 4] This is a schematic diagram showing the internal structure of a valve assembly according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings. Here, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary for explaining the embodiments of the invention and should not be construed as a limitation on the present invention.

[0018] In the description of the embodiments of the present invention, the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship shown based on the drawings, and is for the purpose of explaining and simplifying the description of the embodiments of the present invention, and does not indicate or imply that the device or member needs to have a specific orientation and be constructed and operate in a specific orientation, so it should not be construed as a limitation on the present invention.

[0019] Furthermore, the terms "first" and "second" are used for the purpose of description and should not be construed as indicating or implying relative importance or the number of technical features. Therefore, the features defined as "first" and "second" explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically and clearly limited.

[0020] In the embodiments of the present invention, terms such as "attachment", "connected to each other", "connection", "fixation", etc. should be understood broadly unless specifically defined. For example, it may be fixedly connected, a detachable connection, integrated, a mechanical connection or an electrical connection, a direct connection or an indirect connection via an intermediate medium, or a communication inside two members or an interaction between two members. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific situation.

[0021] (First Embodiment) In the first embodiment of the present invention, as shown in FIGS. 1 to 3, an eccentric cam door closer for a glass door includes a housing 100, a camshaft 200, a valve assembly 300, and a piston compression assembly 400.

[0022] The housing 100 has an inner cavity {110} formed inside the housing 100 along its axial direction.

[0023] The camshaft 200 is rotatably supported in the housing 100, and an eccentric cam 210 that can rotate synchronously is installed on the camshaft 200.

[0024] The valve assembly 300 is slidably installed in the inner cavity 210 and is located on the left side of the eccentric cam 210. <0>

[0025] The piston compression assembly 400 is slidably provided in the inner cavity 110 and is located on the right side of the eccentric cam 210.

[0026] In the piston compression assembly 400, a first roller 410 and a second roller 420 are installed at the end near the eccentric cam 210. On the outer circumferential surface of the eccentric cam 210, a first closed arc groove 220 and a second closed arc groove 230 are installed for closed positioning, and a first open arc groove 240 and a second open arc groove 250 are installed for open positioning.

[0027] In the closed state, the first roller 410 is fitted into the first closed arc-shaped groove 220, and the second roller 420 is fitted into the second closed arc-shaped groove 230. In the fully open state in the clockwise direction, the first roller 410 is fitted into the first open arc-shaped groove 240. In the fully open state in the counterclockwise direction, the second roller 420 is fitted into the second open arc-shaped groove 250.

[0028] Specifically, in this embodiment, the eccentric cam door closer for glass doors has a novel structure in which the door body is attached to the housing 100, and the door closer can stably maintain the open and closed state of the door through the coordination of the first roller 410 and the second roller 420 installed on the piston compression assembly 400 with the eccentric cam 210 of the camshaft 200. When the door is opened clockwise to a predetermined position, the first roller 410 fits into the first open arc groove 240 and is fixed relative to the eccentric cam 210. When the door is opened counterclockwise to a predetermined position, the second roller 420 fits into the second open arc groove 250 and is fixed relative to the eccentric cam 210. When the door is closed to a predetermined position, the first roller 410 engages with the first closing arc groove 220, and the second roller 420 engages with the second closing arc groove 230, fixing them relative to the eccentric cam 210. This prevents the camshaft 200 from rotating further within the housing 100, positions it at a predetermined position relative to the door's opening and closing angle, ultimately stopping the door in that position and improving reliability.

[0029] (Second embodiment) In the second embodiment of the present invention, as shown in Figure 2, the first roller 410 and the second roller 420 always contact the outer circumferential surface of the eccentric cam 210 regardless of the rotational position of the eccentric cam 210, thereby suppressing the generation of gaps between the first roller 410 and the second roller 420 and the eccentric cam 210.

[0030] Specifically, in this embodiment, the first roller 410 and the second roller 420 are always in contact with the outer circumferential surface of the eccentric cam 210. Therefore, when the camshaft 200 is rotating within the housing 100, the first roller 410 and the second roller 420 are subjected to a damping effect on the eccentric cam 210. This reduces the instantaneous speed when the door is closed, ensures sufficient cushioning by the door closer when the door is closed, and enhances the cushioning effect of the door closer.

[0031] Other parts of this embodiment are the same as those of the first embodiment, and for features not described in this embodiment, the interpretation of the first embodiment applies, and their description is omitted here.

[0032] (Third embodiment) In a third embodiment of the present invention, as shown in Figure 2, a spring member 430 is installed inside the piston compression assembly 400. The spring member 430 pushes the first roller 410 and the second roller 420, causing the first roller 410 and the second roller 420 to always be in flexible contact with the outer circumferential surface of the eccentric cam 210.

[0033] Specifically, in this embodiment, the spring member 430 has a predetermined elasticity. The moving first roller 410 and second roller 420 flexibly contact the outer circumferential surface of the eccentric cam 210 via the spring member 430. Furthermore, the effect of flexible clamping on the eccentric cam 210 is realized, suppressing damage to the eccentric cam 210 due to excessive pressure and improving the effectiveness of use.

[0034] Other parts of this embodiment are the same as those of the second embodiment, and for features not described in this embodiment, the interpretation of the second embodiment applies, and their description is omitted here.

[0035] (Fourth embodiment) In a fourth embodiment of the present invention, as shown in Figure 2, the piston compression assembly 400 further includes a compression piston block 440 slidably provided within the lumen 110. The spring member 430 is supported at one end in contact with the housing 100 and at the other end inserted into the compression piston block 440 and supported in contact with the compression piston block 440. At the end of the compression piston block 440 closest to the eccentric cam 210, two fixed pins 450 are provided at a distance from each other, and a first roller 410 and a second roller 420 are rotatably attached to the two fixed pins 450, respectively.

[0036] Specifically, in this embodiment, the compression piston block 440 and the inner wall of the lumen 110 slide in sync, reducing the guide configuration for axially aligning the compression piston block 440. During use, the compression piston block 440 moves when pushed by the spring member 430. The compression piston block 440 moves in the longitudinal direction of the housing 100 due to the guiding function of the lumen 110. Therefore, the first roller 410 and the second roller 420 make precise contact with the eccentric cam 210, increasing the reliability of operation.

[0037] Other parts of this embodiment are the same as those of the third embodiment, and for features not described in this embodiment, the interpretation of the third embodiment applies, and their description is omitted here.

[0038] (Fifth embodiment) In the fifth embodiment of the present invention, as shown in Figure 2, the spring member 430 includes an inner spring 431 and an outer spring 432. The outer spring 432 is placed over the outside of the inner spring 431. One end of the outer spring 432 and the inner spring 431 are simultaneously in contact with and supported by the housing 100. The other ends of the outer spring 432 and the inner spring 431 are simultaneously inserted into the compression piston block 440 and are in contact with and supported by the compression piston block 440.

[0039] Specifically, in this embodiment, the spring member 430 has a simple structure and a rational design. When the spring member 430 is subjected to force and expands or contracts, the inner spring 431 and the outer spring 432 both expand or contract accordingly without interfering with each other. Therefore, when the inner spring 431 and the outer spring 432 are used in combination, deformation is less likely to occur, and the service life of the inner spring 431 and the outer spring 432 can be effectively extended. The combined design significantly improves the elasticity of the spring member 430 and ensures the verticality and stability of the spring force. Furthermore, it can effectively prevent the inner spring 431 and the outer spring 432 from being damaged by excessive load.

[0040] Other parts of this embodiment are the same as those of the fourth embodiment, and for features not described in this embodiment, the interpretation of the fourth embodiment applies, and their description is omitted here.

[0041] (Sixth Embodiment) In the sixth embodiment of the present invention, as shown in Figures 1 and 2, the lumen 110 is partitioned by a valve assembly 300, forming a first oil passage 500 and a second oil passage 600 located on both sides of the valve assembly 300. The communication between the first oil passage 500 and the second oil passage 600 is controlled by the valve assembly 300. A third oil passage 700 is installed inside the piston compression assembly 400, which is in communication with the second oil passage 600.

[0042] Specifically, in this embodiment, hydraulic fluid is present in both the first oil passage 500 and the third oil passage 700. As the housing 100 rotates along with the rotation of the door body, the positions of the first roller 410 and the second roller 420 in the eccentric cam 210 change. This changes the volume of the third oil passage 700, causing hydraulic fluid to flow in the second oil passage 600 and the third oil passage 700, creating a pressure difference between the first oil passage 500 and the second oil passage 600, and changing the state of the valve assembly 300. Therefore, hydraulic fluid flows between the first oil passage 500 and the second oil passage 600, maintaining a balance in the pressure difference between the first oil passage 500 and the second oil passage 600. In other words, the flow of hydraulic fluid in the first oil passage 500, the second oil passage 600, and the third oil passage 700 can be matched to the movement of the door body.

[0043] Other parts of this embodiment are the same as those of the first embodiment, and for features not described in this embodiment, the interpretation of the first embodiment applies, and their description is omitted here.

[0044] (Seventh Embodiment) In the seventh embodiment of the present invention, as shown in Figure 4, the valve assembly 300 comprises a valve piston 310, a valve body 320, a valve core member 340, and a core spring 350.

[0045] The valve piston 310 is slidably mounted within the lumen 110.

[0046] The valve body 320 is installed inside the valve piston 310. The valve body 320 has valve passages 330 that communicate with the first oil passage 500 and the second oil passage 600, respectively.

[0047] The valve core member 340 is movably provided within the valve passage 330 and is used to open or close the valve passage 330.

[0048] The core spring 350 is housed within the valve passage 330, with one end connected to the valve body 320 and the other end connected to the valve core member 340, which biases the valve core member 340 to block the valve passage 330.

[0049] Specifically, in this embodiment, the movement of the valve core member 340 achieves the opening or closing of the valve passage 330. The installation of the core spring 350 ensures the accuracy of the movement of the valve core member 340. When a pressure difference occurs between the first oil passage 500 and the second oil passage 600, the hydraulically pushed valve core member 340 moves within the valve passage 330, overcoming the elastic force of the core spring 350, and opens the valve passage 330. When the pressure difference between the first oil passage 500 and the second oil passage 600 is balanced, the valve core member 340 is pushed by the elastic force of the core spring 350, moves within the valve passage 330, returns to its original position, and closes the valve passage 330. The state of the valve assembly 300 changes automatically and is highly reliable.

[0050] Other parts of this embodiment are the same as those of the sixth embodiment, and for features not described in this embodiment, the interpretation of the sixth embodiment applies, and their description is omitted here.

[0051] (Eighth embodiment)

[0052] In the seventh embodiment of the present invention, as shown in Figure 1, The housing 100 has a first bearing cylinder 120 positioned at the front end of the camshaft 200, a position limiting mounting seat 130 positioned at the rear end of the camshaft 200, and a second bearing cylinder 140 mounted on the position limiting mounting seat 130. The midpoints of the first bearing cylinder 120 and the second bearing cylinder 140 lie on the same axis, and the camshaft 200 is provided passing through the first bearing cylinder 120 and the second bearing cylinder 140.

[0053] Specifically, in this embodiment, the main function of the first bearing cylinder 120 and the second bearing cylinder 140 is to fix the camshaft 200. The first bearing cylinder 120 and the second bearing cylinder 140 play a role in reducing vibration when the camshaft 200 rotates, supporting the maintenance of balance and stability of the camshaft 200, reducing friction and wear, and extending the life of the camshaft 200.

[0054] Other parts of this embodiment are the same as those of the first embodiment, and for features not described in this embodiment, the interpretation of the first embodiment applies, and their description is omitted here.

[0055] The foregoing describes only preferred embodiments of the present invention and does not limit the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the invention are all included within the scope of protection of the present invention. [Explanation of Symbols]

[0056] 100 Housing 110 Luminal body 120 First bearing cylinder 130 Position restriction mounting base 140 Second bearing cylinder 200 camshaft 210 Eccentric Cam 220 First closed arc-shaped groove 230 Second closed arcuate groove 240 First open arc-shaped groove 250 Second open arc-shaped groove 300 Valve Assembly 310 Valve Piston 320 Valve body 330 Valve flow path 340 Valve core component 350 Core Spring 400 Piston Compression Assembly 410 First Roller 420 Second Roller 430 Spring component 431 Inner spring 432 Outer spring 440 Compression Piston Block 450 Fixing pins 500 First oil channel 600 Second oil channel 700 Third oil route

Claims

1. An eccentric cam door closer for glass doors, It comprises a housing, a camshaft, a valve assembly, and a piston compression assembly. The housing has an internal cavity formed inside it along its axial direction. The camshaft is rotatably supported within the housing, and an eccentric cam that rotates synchronously is installed on the camshaft. The valve assembly is slidably installed within the lumen and is located to the left of the eccentric cam. The piston compression assembly is slidably mounted within the lumen and is located to the right of the eccentric cam. In the piston compression assembly, a first roller and a second roller are installed on the eccentric cam side. On the outer circumferential surface of the eccentric cam, a first closed arc-shaped groove and a second closed arc-shaped groove used for closed positioning, and a first open arc-shaped groove and a second open arc-shaped groove used for open positioning are provided. In the closed state, the first roller is fitted into the first closed arc-shaped groove, and the second roller is fitted into the second closed arc-shaped groove. In a fully open state in the clockwise direction, the first roller is fitted into the first open arc-shaped groove. In a fully open state in the counterclockwise direction, the second roller is fitted into the second open arc-shaped groove. The internal lumen is partitioned by the valve assembly, forming a first oil passage and a second oil passage located on both sides of the valve assembly, the communication between the first oil passage and the second oil passage is controlled by the valve assembly, and a third oil passage is installed in the piston compression assembly that communicates with the second oil passage. The valve assembly comprises a valve piston, a valve body, a valve core member, and a core spring. The valve piston is provided so as to be slidable in the axial direction within the lumen, The valve body is installed inside the valve piston, and valve passages that communicate with the first oil passage and the second oil passage are provided through it. The valve core member is movably provided within the valve passage and is used to open or close the valve passage. The core spring is housed within the valve passage, with one end connected to the valve body and the other end connected to the valve core member, and biases the valve core member to block the valve passage. An eccentric cam door closer for glass doors, characterized by the following features.

2. An eccentric cam door closer for a glass door according to claim 1, A spring member is installed inside the piston compression assembly. The spring member pushes the first roller and the second roller, causing the first roller and the second roller to always be in flexible contact with the outer circumferential surface of the eccentric cam. An eccentric cam door closer for glass doors, characterized by the following features.

3. An eccentric cam door closer for a glass door according to claim 2, The piston compression assembly further includes a compression piston block slidably provided within the lumen, The spring member is supported at one end by contacting the housing, and the other end is inserted into the compression piston block and supported by contacting the compression piston block. In the compression piston block, two fixing pins are provided at a distance from the end closest to the eccentric cam, and the first roller and the second roller are rotatably attached to the two fixing pins, respectively. An eccentric cam door closer for glass doors, characterized by the following features.

4. An eccentric cam door closer for a glass door according to claim 3, The spring member includes an inner spring and an outer spring, the outer spring being fitted over the outside of the inner spring, one end of the outer spring and the inner spring simultaneously contacting and being supported by the housing, and the other end of the outer spring and the inner spring simultaneously being inserted into the compression piston block and contacting and being supported by the compression piston block. An eccentric cam door closer for glass doors, characterized by the following features.

5. An eccentric cam door closer for a glass door according to claim 1, The housing has a first bearing cylinder installed at a position corresponding to the front end of the camshaft, a position limiting mounting seat installed at a position corresponding to the rear end of the camshaft, a second bearing cylinder installed on the position limiting mounting seat, the midpoints of the first bearing cylinder and the second bearing cylinder lie on the same axis, and the camshaft is provided passing through the first bearing cylinder and the second bearing cylinder. An eccentric cam door closer for glass doors, characterized by the following features.

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