KR100960574B1 - Camera door opening and shutting apparatus - Google Patents

Abstract

The present invention relates to a camera door opening and closing device, and more particularly, to a camera door opening and closing device for opening and closing the door of the camera mounted on the mobile phone using the shape memory alloy shrinking when the current is applied.

The camera door opening and closing apparatus of the present invention, the camera door opening and closing device for opening and closing the camera lens, the opening is formed and is disposed on the front of the lens; A rotation door having one end hinged to the base and opening and closing the opening by rotation; An opening / closing mover mounted on the base to linearly move and rotating the rotary door when the linear door moves in contact with the rotary door; A first shape suppressing alloy (SMA) coupled to the opening and closing mover and contracted upon application of current; When the opening is opened or closed is made of a locking portion for fixing the rotating door, it is characterized in that the rotating door is moved by moving the opening and closing mover by the contracting and relaxing action of the first shape of the alloy.

Camera Door Opener, Shape Memory Alloy

Description

Camera Door Opener {CAMERA DOOR OPENING AND SHUTTING APPARATUS}

The present invention relates to a camera door opening and closing device, and more particularly, to a camera door opening and closing device for opening and closing the door of the camera mounted on the mobile phone using the shape memory alloy shrinking when the current is applied.

With the development of photography and digital technology, mobile phones or PDAs equipped with a camera device for converting an image formed through a lens into an electrical signal using an image pickup device and converting the image into digital data are stored.

The camera device is installed on the back, front or side of the mobile phone or PDA, and is installed to allow light to enter the lens.

Most mobile phones or PDAs are designed to expose the lens to the outside. In this case, dust or debris is frequently caught on the surface of the lens, which damages the lens or prevents clear pictures.

Thus, a PDA or a mobile phone with a camera door was developed.

At this time, the opening and closing method of the camera door is proposed by a mechanical camera door opening and closing device that is opened and closed by a mechanical interlock according to the user operation, and the opening and closing method by an automatic camera door opening and closing device that automatically opens and closes according to a specific condition.

As an example of an automatic camera door opening and closing device, a "camera door opening and closing device of a folder type mobile phone" published in Patent Publication 2004-102482 and a "camera door opening and closing device of a folder type mobile phone" published in Patent Publication 2004-102483 are known.

The 102482 patent is to open and close the camera door with one door automatically by using solenoid, and the 102483 patent is to open and close the camera door with two doors automatically using the drive motor.

However, the prior art as described above, because the solenoid or motor for mounting the door to obtain the power, there is a limit to slim the camera door opening and closing device because of the large size of the parts, such as solenoid or motor.

An object of the present invention is to provide a camera door opening and closing device that can reduce the overall thickness of the camera door opening and closing device by using a thin shape memory alloy as a drive source for opening and closing the door.

In order to achieve the above object, the camera door opening and closing device of the present invention, the camera door opening and closing device for opening and closing the camera lens, the opening is formed and is disposed on the front of the lens; A rotation door having one end hinged to the base and opening and closing the opening by rotation; An opening / closing mover mounted on the base to linearly move and rotating the rotary door when the linear door moves in contact with the rotary door; A first shape suppressing alloy (SMA) coupled to the opening and closing mover and contracted upon application of current; When the opening is opened or closed is made of a locking portion for fixing the rotating door, it is characterized in that for rotating the rotary door by moving the opening and closing mover by the contracting or relaxing action of the first shape of the alloy.

The rotating door is formed with a guide groove open to one side between one end and the opening, the opening and closing mover is disposed in the guide groove and in contact with the rotary door, the guide groove is formed to become smaller toward one direction, As the opening and closing mover moves linearly along the guide groove, the rotating door rotates to open the opening.

The rotating door may include a first rotating door having one end hinged to the base and opening and closing the opening by rotation; One end is hinged to the base, and the second rotary door for opening and closing the opening by rotation with the first rotary door, the guide groove, between the one end of the first rotary door and the opening A first guide groove open in a direction of the second rotating door; And a second guide groove open between the one end of the second rotary door and the opening in the first rotation door direction, and the opening / closing mover is disposed between the first guide groove and the second guide groove. In contact with the rotary door and the second rotary door, the interval between the first guide groove and the second guide groove is smaller and smaller toward the one direction in the opening, the first rotary door as the linear movement in one direction And a second rotating door rotates to open the opening.

The locking unit may include an opening holding member for maintaining the opening of the opening by the rotating door; The rotating door is made of a closing holding member to maintain the closed state.

The opening holding member is hinged to the base, and the locking member is caught on the other end of the rotary door when the rotary door rotates to open the opening; A locking spring for adding an elastic force to the locking member so as to maintain a state in which the other end of the rotary door is locked; The second mold restraint alloy is connected to the hook member and contracts when an electric current is applied. The second mold restraint alloy rotates the hook member in a direction opposite to the direction of elastic force of the hook spring.

The closing holding member is connected to the rotating door is made of a closing spring for adding an elastic force so that the rotating door is rotated in the direction of closing the opening.

The first mold restraining alloy is formed in a linear or coil shape.

The second mold restraining alloy is formed in a linear or coil form.

The base is formed with a stopper for preventing the rotation of the rotary door to be rotated only up to a certain angle during the rotation of the rotary door.

According to the camera door opening and closing device of the present invention as described above, since the camera door is opened and closed using the shape memory alloy, the thickness of the camera door opening and closing device mounted on a mobile phone can be made thinner.

1 is a state diagram in a state in which a mobile phone camera door opening and closing device according to an embodiment of the present invention closed the opening, Figure 2 is a state diagram in a state in which the mobile phone camera door opening and closing device according to an embodiment of the present invention opened the opening. to be.

The camera door opening and closing apparatus of the present invention can be applied to a device equipped with a camera such as a digital camera as well as a mobile phone.

Hereinafter, the present embodiment will be described on the premise that the camera door opening and closing apparatus is mounted on the mobile phone.

1 and 2, the camera door opening and closing apparatus of the present invention, the base 10, the rotating door, the opening and closing mover 30, the first shape locking alloy 40, the locking unit and the like Is done.

The base 10 may be an outer case of the mobile phone camera, or may be made of a separate member and mounted outside the mobile phone camera.

An opening 11 is formed in the base 10, and the opening 11 is disposed in front of the camera lens so that the opening 11 and the lens lie in a straight line in the optical axis direction.

One end of the rotary door is hinged to the base 10, and the opening and closing of the opening 11 is rotated.

One end of the rotary door refers to a place far from the opening 11 of both ends of the rotary door.

The rotating door may be made of one or more, and in the present embodiment, the first rotating door 21 includes two rotating doors, that is, a first rotating door 21 and a second rotating door 25. ) And the second rotary door 25 is rotated to open and close the opening 11 together.

One end of the first rotating door 21 is hinged to the base 10 and opens and closes a part of the opening 11 by rotation.

One end of the second rotating door 25 is hinged to the base 10, and the other part of the opening 11 is opened and closed by rotation.

That is, the first rotating door 21 and the second rotating door 25 respectively open and close part of the opening 11 so that the opening 11 is opened and closed as a whole.

The first rotating door 21 and the second rotating door 25 are in contact with each other to close the opening 11 and rotate in opposite directions to open the opening 11.

The opening and closing mover 30 is mounted to the base 10 so as to be linearly movable, and serves to rotate the rotary door when the linear door moves in contact with the rotary door.

To this end, the rotary door is formed with a guide groove open to one side between one end and the opening (11).

The guide groove is formed in a curved shape that gradually decreases toward the opposite direction from the opening 11, that is, in one direction of the rotary door.

In the present embodiment, the guide groove, the first guide groove 22 formed in the direction of the second rotary door 25 between one end of the first rotary door 21 and the opening 11 and the first The second guide groove 26 is formed between one end of the second rotating door 25 and the opening 11 in the direction of the first rotating door 21.

The first guide groove 22 and the second guide groove 26 are formed to become smaller toward the opposite direction of the opening 11, respectively, the first guide groove 22 and the second guide groove ( The interval between the 26 is formed to become smaller in the opposite direction in the opening (11).

On the contrary, the first guide groove 22 and the second guide groove 26 are formed to become smaller toward the opening 11, respectively, so that the first guide groove 22 and the second guide groove ( 26 may be formed such that the interval between the smaller toward the opening 11 in the direction.

In addition, the opening and closing mover 30 has a circular cross section, and is disposed between the first guide groove 22 and the second guide groove 26 so that the first rotating door 21 and the second rotating door are provided. Contact with (25).

Accordingly, as shown in FIG. 2, the opening / closing mover 30 moves linearly in the opposite direction of the opening 11 between the first guide groove 22 and the second guide groove 26. The first rotating door 21 and the second rotating door 25 rotate to open the opening 11.

That is, since the interval between the first guide groove 22 and the second guide groove 26 becomes smaller toward the opposite direction of the opening 11, the first guide groove 22 and the second guide groove ( 26, the first and second rotation doors 21 and 25 rotate about one end as the opening / closing mover 30 is linearly moved in the opposite direction of the opening 11. The opening 11 is opened.

The first shape-retaining alloy 40 is connected to the opening and closing mover 30 to generate power to linearly move the opening and closing mover 30.

Since the first shape-retaining alloy 40 is contracted upon application of current, the first and second retainer alloys 40 may be moved away from the opening 11.

At this time, the first mold-shaped suppression alloy 40 is formed in a linear or coil form, it is preferable to be made in a linear to slim the opening and closing device.

The locking part serves to fix the rotating door when the opening 11 is opened or closed.

The locking part includes an opening holding member 50 for maintaining the opening of the opening 11 and a closing holding member for keeping the rotating door closing the opening 11. Is made of.

The opening and holding member 50 includes a locking member 51, a locking spring 52, and a second shape storage alloy 53.

The locking member 51 is hinged to the base 10, and when the rotary door is rotated to open the opening 11, the other end of the rotary door is caught to secure the rotary door. do.

To this end, the locking member 51 is provided with a protrusion in the rotation door direction to serve to hang the other end of the rotation door.

And, the locking spring 52, one end is fixed to the base 10 and the other end is coupled to the locking member 51, so that the other end of the rotary door is caught in the locking member 51 to maintain a state It serves to add elastic force.

In this embodiment, the torsion spring was used as the locking spring 52.

The second mold-retaining alloy 53 is connected to the locking member 51 and contracted when an electric current is applied to rotate the locking member 51 in a direction opposite to the direction of elastic force of the locking spring 52.

The rotating door is released from the locking member 51 and freely rotates by rotating the locking member 51 in a direction opposite to the direction of the elastic force of the locking spring 52 by contracting the second shape retaining alloy 53. It becomes the state that can do it.

At this time, the second mold retaining alloy 53 is formed in a linear form or a coil form, it is preferable that the linear shape for the slimming of the switchgear.

In this embodiment, the rotary door is composed of two, that is, the first rotary door 21 and the second rotary door 25, the locking member 51 and the locking spring 52 are also two The first rotary door 21 and the second rotary door 25 are rotated to fix the first rotary door 21 and the second rotary door 25 when the opening 11 is opened. It could be.

The second shape-retaining alloy 53 may be made of two and connected to two locking members 51, respectively, but is made of one and is connected to two locking members 51 as shown in the present embodiment so that two locking members 51 may be connected. ) Can be operated simultaneously.

Since the second shape-retaining alloy 53 is linear, the path may be changed through a plurality of rollers or the like as shown in FIGS. 1 and 2.

The closing and holding member is connected to the first rotating door 21 and the second rotating door 25 so that the first rotating door 21 and the second rotating door 25 close the opening 11. It consists of a closing spring 60 for applying an elastic force to rotate in the direction.

The closing spring 60 is composed of two ends of each of which is connected to the first rotary door 21 or the second rotary door 25, the other end may be fixed to the base 10.

However, in this embodiment, only one closed spring 60 is used so that one end is connected to the first rotating door 21 and the other end is connected to the second rotating door 25.

Meanwhile, the base 10 rotates the first rotating door 21 and the second rotating door 25 so that the first rotating door 21 and the second rotating door 25 are rotated only up to a predetermined angle. The stopper 12 which prevents this is formed.

Hereinafter, an operation process of the present invention having the above-described configuration will be described.

As shown in FIG. 1, in the state in which the opening 11 is closed, the first rotating door 21 and the second rotating door 25 are in contact with each other by the elastic force of the closing spring 60. The opening 11 is closed.

In this case, the opening and closing mover 30 is located between the first guide groove 22 and the second guide groove 26 adjacent to the front, that is, the direction of the opening 11, the first shape locking alloy 40 ) And the second mold clamping alloy 53 are placed in a relaxed state because no current is applied.

In this state, when the user manipulates a separate button or the like to open the opening 11, the controller (not shown) applies a current to the first shape-retaining alloy 40.

When a current is applied to the first mold restraint alloy 40, the first mold restraint alloy 40 is contracted, and the opening / closing mover 30 has the first guide groove 22 and the second guide groove. It moves linearly in the direction away from the said opening part 11 between (26).

At this time, the distance between the first guide groove 22 and the second guide groove 26 is formed to become smaller as the distance from the opening 11, the first guide groove 22 and the second As the opening / closing mover 30 disposed between the guide grooves 26 moves away from the opening 11, the first rotating door 21 and the second rotating door 25 are shown in FIG. 2. The opening 11 is opened while inflating the closing spring 60 by rotating about one end hinged to the base 10, respectively.

When the first rotary door 21 and the second rotary door 25 are rotated by a predetermined angle or more, each other end is in contact with the locking member 51.

In this state, if the first rotation door 21 and the second rotation door 25 further rotates, the locking member 51 is rotated by the first rotation door 21 and the second rotation door 25. Thus, the locking spring 52 is compressed or inflated.

When the first rotating door 21 and the second rotating door 25 pass over the protruding portion of the locking member 51, the locking by the elastic restoring force of the locking spring 52 that has been compressed or expanded. The member 51 is reversely rotated so as to hang the other ends of the first rotating door 21 and the second rotating door 25.

That is, although the first rotary door 21 and the second rotary door 25 are to be rotated in the direction of closing the opening 11 by the elastic force of the closing spring 60, the first rotary door 21 ) And the other end of the second rotary door 25 are caught by the locking member 51 to maintain the opening 11 in an open state.

When the opening 11 is maintained in the open state as described above, the controller not shown cuts off the current applied to the first mold restraint alloy 40, so that the first mold restraint alloy 40 continues to the current. To prevent heating.

Meanwhile, when the opening 11 is to be closed in the state in which the opening 11 is open, as shown in FIG. 2, the control unit not shown in FIG. Is authorized.

Then, the second shape-retaining alloy 53 is contracted, so that the locking member 51 is rotated in the direction opposite to the direction of the elastic force acting on the locking spring 52.

As the locking member 51 is rotated by the second shape locking alloy 53, the first rotating door 21 and the second rotating door 25 which are caught by the locking member 51 are expanded. By the elastic restoring force of the closing spring 60 is rotated in the direction to close the opening 11 to close the opening 11 as shown in FIG.

At this time, the opening and closing mover 30 is the first guide retaining alloy 40 is in a state of being relaxed, the first guide when the first rotation door 21 and the second rotation door 25 is rotated The free movement between the groove 22 and the second guide groove 26 is moved in the direction of the opening 11 as shown in FIG.

In addition, the controller not shown cuts off the current applied to the second mold restraint alloy 53 to prevent the second mold restraint alloy 53 from being continuously heated to the current.

As described above, by opening and closing the door of the mobile phone camera using the shape memory alloy, it is possible to achieve a slimmer product by making the thickness of the opening and closing device thinner.

The camera door opening and closing apparatus of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range in which the technical idea of the present invention is permitted.

1 is a state diagram in a state in which a mobile phone camera door opening and closing device according to an embodiment of the present invention closed the opening;

2 is a state diagram in a state in which the mobile phone camera door opening and closing device according to an embodiment of the present invention in the opening opening.

<Description of the symbols for the main parts of the drawings>

10: base, 11: opening, 12: stopper, 21: first rotating door, 22: first guide groove, 25: second rotating door, 26: second guide groove, 30: opening and closing mover, 40: first shape Memory alloy, 50: open holding member, 51: locking member, 52: locking spring, 53: second shape holding alloy, 60: closing spring,

Claims (9)

In the camera door opening and closing device for opening and closing the camera lens, A base having an opening formed in the front of the lens; A rotation door having one end hinged to the base and opening and closing the opening by rotation; An opening / closing mover mounted on the base to linearly move and rotating the rotary door when the linear door moves in contact with the rotary door; A first shape suppressing alloy (SMA) coupled to the opening and closing mover and contracted upon application of current; When the opening is opened or closed is made of a locking portion for fixing the rotating door, Camera opening and closing device, characterized in that for rotating the rotary door by moving the opening and closing the mover by the contracting or relaxing action of the first shape-retaining alloy. The method of claim 1, The rotating door is formed with a guide groove open to one side between one end and the opening, The opening and closing mover is disposed in the guide groove and in contact with the rotating door, The guide groove is formed smaller and smaller toward one direction, the camera door opening and closing device is characterized in that the rotary door is rotated to open the opening as the opening and closing move the linear movement along the guide groove. 3. The method of claim 2, The rotating door is, A first rotating door having one end hinged to the base and opening and closing the opening by rotation; One end is hinged to the base, and made of a second rotary door to open and close the opening by rotation with the first rotary door, The guide groove, A first guide groove opened between one end of the first rotary door and the opening in the second rotary door direction; A second guide groove formed between one end of the second rotation door and the opening in the first rotation door direction; The opening and closing mover is disposed between the first guide groove and the second guide groove in contact with the first rotating door and the second rotating door, The distance between the first guide groove and the second guide groove becomes smaller toward one direction in the opening, and the first rotating door and the second rotating door rotate as the opening / closing mover moves linearly in one direction of the opening. Camera door opening and closing device, characterized in that for opening the opening. The method according to any one of claims 1 to 3, The locking unit, An opening holding member for keeping the rotating door in the open state; Camera door opening and closing device characterized in that the rotating door made of a closing holding member to maintain the closed state. The method of claim 4, wherein The opening holding member, A locking member hinged to the base and the other end of the rotary door being caught when the rotary door rotates to open the opening; A locking spring for adding an elastic force to the locking member so as to maintain a state in which the other end of the rotary door is locked; Is connected to the locking member, made of a second mold-shaped alloy that is contracted upon application of current, And the second mold retaining alloy rotates the locking member in a direction opposite to the direction of elastic force of the locking spring when the second alloy is held in the contracted state. The method of claim 4, wherein The closing holding member, And a closing spring connected to the rotation door to add an elastic force so that the rotation door rotates in the direction of closing the opening. The method of claim 1, The first mold-type storage alloy is a camera door opening and closing device, characterized in that made of a linear or coil form. The method of claim 5, The second mold-type storage alloy is a camera door opening and closing device, characterized in that made of a linear or coil shape. The method according to any one of claims 1 to 3, And the stopper is formed on the base to stop the rotation of the rotating door so as to rotate only up to a predetermined angle when the rotating door is rotated.

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