KR100754290B1 - Hinge device - Google Patents

Abstract

A hinge unit is provided to remove space for installing spring by providing a cam spring composed of a plate spring so that the cam spring can serve as both a cam and a spring. A hinge unit(30), installed between the first member and the second member so that they can relatively rotate for each other, comprises a rotary cam(31) and a cam spring(32). The rotary cam, installed at the second member, rotates together with the second member. The cam spring, composed of a plate spring, elastically supports the rotary cam. The cam spring reciprocally acts with the rotary cam, and suspends the relative rotation between the first member and the second member. The cam spring, formed in the shape of a ring, is protruded toward the rotary cam so that both sides of the cam spring can generate elastic force.

Description

Hinge Device {HINGE DEVICE}

1 and 2 are perspective views illustrating an opening and closing operation state of a mobile phone to which a hinge device according to the present invention is applied.

3 is an exploded perspective view of the hinge device according to the present invention.

4 and 5 are cross-sectional views showing an operating state of the hinge device according to the present invention.

Explanation of symbols on the main parts of the drawings

10: first member 20: second member

30: hinge device 31: rotating cam

31a: cam groove 31b: first installation hole

31c: stopper 32: cam spring

32a: cam projection 32b: jamming projection

33: hinge case 33a: seating groove

33b: second installation hole 33c: locking groove

33d: Jaw 34: Holder

The present invention relates to a hinge device, and more particularly, to a hinge device that is installed between two members so that the two members are rotatably installed with each other.

In general, the hinge device is a device installed between the first member and the second member which are hinged to each other so that the two members can be rotatably installed with each other. Used for equipment.

Among these hinge devices, there is a hinge device that allows the first member and the second member which are hinged to each other to be temporarily stopped in a predetermined angle.

The conventional hinge device includes a rotating cam installed on the first member and rotating together with the first member, and a movable cam mounted on the second member so as to move forward and backward through the coil spring. Has a cam surface with a cam groove formed thereon, and the cam protrusion moves along the cam surface according to the relative rotational movement of the first member and the second member, and is received by the cam groove and is caught by the first member and the second member. The rotation is temporarily stopped to maintain the angle between the first member and the second member until a certain amount of external force is applied.

However, in the mobile phone to which the hinge device is applied, a hinge device is installed between the front surface of the first member and the rear surface of the second member so that the first member and the second member rotate relatively in the width direction and the front surface of the first member is opened and closed. There is a cell phone.

In order to allow the second member to rotate and open in the width direction, the hinge device must be installed in the thickness direction of the mobile phone. Since the conventional hinge device must secure a space for installing the coil spring, its length is long. Therefore, the conventional hinge device has a problem that it can be applied only when the thickness of the first member or the second member is thicker than a predetermined level.

The present invention is to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a hinge device that can be used to hinge the two members having a thin thickness.

In order to achieve the above object, the present invention provides a hinge device provided between a first member and a second member which are hinged to each other so that the first member and the second member are rotatably installed with each other. Is installed on the second member and the rotating cam rotates with the second member, and a leaf spring consisting of the elastic support of the rotating cam and interacting with the rotating cam and the relative rotation of the first member and the second member The cam spring includes a cam spring for temporarily stopping, and the cam spring is formed in an annular shape and protrudes convexly toward the rotating cam so that both sides can exert an elastic force.

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In addition, any one of the protruding portion of the cam spring and the rotary cam, the cam projection is formed protruding, the other is characterized in that the cam groove that the cam projection is caught is provided concave.

In addition, two cam protrusions are disposed at intervals of 180 degrees in the circumferential direction, and four cam grooves are disposed at intervals of 90 degrees in the circumferential direction, thereby stopping rotation of the rotating cam at intervals of 90 degrees. .

In addition, a hinge case is installed on the first member and provided with a seating groove for mounting the cam spring, one end is installed in the hinge case and the other end is installed in the rotating cam through the cam spring so that the rotating cam is It further comprises a holder to be rotatably installed in the hinge case.

In addition, a stopper protruding from the rotary cam toward the hinge case and protruding away from the center of rotation of the rotary cam by a predetermined distance, and protruding from the hinge case toward the rotary cam and protruding onto the rotation path of the stopper. It characterized in that it further comprises a locking jaw.

In addition, the hinge case is provided with a locking groove extending radially outward from the seating groove, and the cam spring is formed to protrude laterally and is provided with a locking projection that is caught by the locking groove.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings.

In this embodiment, a case where the hinge device is applied to a cellular phone will be described as an example.

As shown in FIG. 1, the mobile phone to which the hinge device according to the present invention is applied includes a first member 10 provided with a talker and a keypad, a display window, a receiver, and the like, and a first member 10. It is hinged to the front of the rotation is composed of a second member 20 for opening and closing the front of the first member 10, the first member 10 and the second member 20 through the hinge device 30 When the first member 10 and the second member 20 are hinged to each other to achieve a predetermined angle through the hinge device 30, the relative rotation of the first member 10 and the second member 20 is temporarily It is designed to be in a stopped state until it stops and a certain amount of external force is transmitted. In the present embodiment, when the first member 10 and the second member 20 are arranged in parallel so that the front surface of the first member 10 is closed by the second member 20 and as shown in FIG. 2. Likewise, when the first member 10 and the second member 20 are at an angle of 90 degrees and the front surface of the first member 10 is opened, the relative rotation of the first member 10 and the second member 20 is Each is temporarily stopped and kept in a stopped state until a predetermined or more external force is transmitted.

To this end, as shown in FIG. 3, the hinge device 30 includes a rotary cam 31 installed in the first member 10 and rotating together with the first member 10 and a leaf spring. And a cam spring 32 elastically supporting 31 and interacting with the rotary cam 31 and allowing relative rotation of the first member 10 and the second member 20 to be temporarily stopped at a predetermined angle. .

As described above, in order to allow the relative rotation of the first member 10 and the second member 20 to be temporarily stopped at a predetermined angle, any one of the surfaces corresponding to each other of the rotary cam 31 and the cam spring 32 are mutually compatible. The cam protrusion 32a protrudes and the cam groove 31a in which the cam protrusion 32a is caught is provided in the recess. In the present embodiment, two cam protrusions 32a are formed at the cam spring 32 at intervals of 180 degrees in the circumferential direction, and four cam grooves are provided at the rotation cam 31 at intervals of 90 degrees to form the first member 10. When the relative rotation of the second member 20 progresses by 90 degrees, the relative rotation of the first member 10 and the second member 20 can be temporarily stopped.

Therefore, as shown in FIG. 4, the cam protrusion 32a remains in the cam groove 31a until a predetermined or more external force is applied, and when the external force is applied, the cam spring 32 is elastically deformed. While the cam protrusion 32a is separated from the cam groove 31a as shown in FIG. 5, the relative rotation of the first member 10 and the second member 20 may proceed. In addition, after the relative rotation of the first member 10 and the second member 20 is at an angle of 90 degrees, the cam protrusion 32a is seated on the cam groove 31a to which the cam was first seated and the cam groove 31a adjacent to it. The first member 10 and the second member 20 are maintained at a 90 degree angle by maintaining a state of being seated in the cam groove 31a until a predetermined external force is applied.

Referring to FIG. 3 again, the hinge device 30 according to the present invention is fixedly installed to the first member 10 so that the rotary cam 31 can be installed in an elastically supported state through the cam spring 32. And a hinge case 33 having a recess 33a in which the cam spring 32 is seated, and one end of which is installed in the hinge case 33 and the other end penetrates through the cam spring 32 to rotate the cam 31. The holder 34 is rotatably installed in the rotary cam 31 to be rotatably installed in the hinge case 33 in a state of being elastically supported by the cam spring 32. At this time, the first installation hole 31a and the second installation hole 33b are provided in the center of the rotary cam 31 and the hinge case 33, respectively, and the cam spring 32 is provided in the center. The holder 34 is formed in an annular shape so as to penetrate through the holder 34. In addition, the seating groove 33a provided in the hinge case 33 is formed in an annular shape so as to correspond to the cam spring 32.

In order to allow the cam spring 32 formed in an annular shape to operate as a leaf spring, both sides of the cam spring 32 protrude toward the rotation cam 31 and protrude toward the rotation cam 31. The cam protrusion 32a mentioned above protrudes from each site | part. Accordingly, the hinge device 30 according to the present invention can simultaneously perform the role of the cam spring 32 to interact with the rotary cam 31 and the spring to make the rotary cam 31 elastically supported. do.

In addition, a pair of radially outwardly on both sides of the seating groove (33a) to prevent the cam spring 32 is rotated by receiving the force through the cam projection (32a) in accordance with the rotation of the rotary cam (31). The engaging groove 33c is formed to extend, and the cam spring 32 is provided with a pair of engaging projections 32b extending radially outward and being held by the engaging grooves 33c, respectively. Therefore, even if the force from the rotary cam 31 acts on the cam protrusion 32a according to the relative rotational movement of the first member 10 and the second member 20, the cam spring 32 is the locking protrusion 32b. Since the cam spring 32 is prevented from being rotated while being supported by the hinge case 33 through the locking groove 33c, the position of the cam protrusion 32a can be kept constant.

In addition, the hinge device 30 according to the present invention is capable of limiting the relative rotation angle of the first member 10 and the second member 20 by limiting the rotation angle of the rotary cam 31. In this way, in order to limit the rotation angle of the rotary cam 31, the rotary cam 31 is provided with a stopper 31c protruding toward the hinge case 33, and the hinge case 33 has a rotary cam ( A locking projection 33d is formed to protrude toward the 31 and is caught by the rotary cam 31. At this time, the stopper 31c is formed to protrude from the center of rotation of the rotary cam 31 by a predetermined distance so as to move in the circumferential direction of the rotary cam 31 with the rotation of the rotary cam 31. ) Protrudes on the rotation path of the stopper 31c so that the stopper 31c is caught by the rotation of the rotary cam 31.

In this embodiment, a pair of stoppers 31c and a pair of latching jaws 33d are formed, respectively, so that the relative rotation angles of the first member 10 and the second member 20 can be limited to 90 degrees. It is.

As described in detail above, the hinge device according to the present invention includes a cam spring made of a leaf spring, so that the cam spring performs the role of the cam and the role of the spring at the same time, so that the space for installing the spring can be deleted, thus being relatively thin. There is an effect that can be used to hinge join two members having a thickness.

Claims (7)

delete A hinge device provided between a first member and a second member hinged to each other to allow the first member and the second member to be rotatably installed with each other, The hinge device includes a rotary cam installed on the second member and rotated together with the second member, and a leaf spring to elastically support the rotary cam and to interact with the rotary cam, the first member and the second member. It includes a cam spring for temporarily stopping the relative rotation of, The cam spring is formed in an annular shape, the hinge device, characterized in that protruding protruding to the rotating cam side so that both sides can exert an elastic force. The method of claim 2, The cam protrusion protrudes from any one of the protruding portion of the cam spring and the rotary cam, and the cam groove on which the cam protrusion is caught is concave. The method of claim 3, wherein Two cam protrusions are disposed at intervals of 180 degrees in the circumferential direction, and four cam grooves are disposed at intervals of 90 degrees in the circumferential direction. Hinges are characterized in that the rotation of the rotating cam is paused at intervals of 90 degrees. . The method of claim 2, A hinge case installed on the first member and provided with a seating groove in which the cam spring is seated, one end of which is installed in the hinge case, and the other end of which is installed in the rotary cam through the cam spring so that the rotary cam is the hinge case. The hinge device further comprises a holder to be rotatably installed. The method of claim 5, A stopper protruding from the rotary cam toward the hinge case and protruding away from the center of rotation of the rotary cam by a predetermined distance; and a locking step protruding from the hinge case toward the rotary cam and protruding onto the rotation path of the stopper. Hinge device further comprising. The method of claim 5, The hinge case is provided with a locking groove extending radially outward from the seating groove, and the cam spring is formed to protrude laterally and is provided with a locking projection to be caught by the locking groove.

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