Automatic-return optical fiber cutter

Abstract

Disclosed is an automatic-return optical fiber cutter which prevents wear by employing a non-contact method in which an optical fiber cutting movement operation and a returning movement operation are performed by magnetic force, and does not damage the surface of a cut optical fiber since a blade is not in contact with the cut optical fiber during returning. The automatic-return optical fiber cutter comprises: a main body unit; a blade; a blade moving module having a first magnet; a cover rotatably mounted on the main body unit; a second magnet configured to, when the cover is closed, approach the first magnet to apply a first repulsive force to the first magnet; and a third magnet configured to, when the cover is opened, approach the first magnet to apply a second repulsive force to the first magnet.

Description

Auto-return fiber optic cleaver

[0001] The present invention relates to an improvement of an optical fiber cleaver, and more particularly, to an improvement of an optical fiber cleaver used to cleave optical fibers required for work such as construction of an optical communication network.

[0002] Fiber optic cleavers are essential equipment for building optical communication networks. When connecting optical cables, a process is required to align each fiber (optical fiber) along its center. To achieve this, the ends of the fibers must be cut into a mirror-like shape.

[0003] In the optical cable connection process, the equipment that cuts each optical cable strand (optical fiber) into a mirror-like shape is an optical fiber cleaver.

[0004] Existing fiber optic cleavers come in manual and semi-automatic versions. Manual cleavers, which manually control the movement of the cutting blade during fiber cleaving, are cumbersome to use and suffer from varying cut quality depending on operating conditions. Representative examples of these manual cleavers include the CI-01 from UCL Swift in Korea and the FC-6S from Sumitomo in Japan.

[0005] Among semi-automatic models, manual return types utilize a spring-driven mechanism. While the blade's movement during cutting is automatically controlled by the spring, the return process is performed manually. Repeatedly returning the blade manually is cumbersome and continues to cause user dissatisfaction. Furthermore, the blade's movement, driven by the spring force, requires the release of a stop ring, which causes wear due to mechanical contact. A representative example of this type is the Fujikura CT-30 from Japan.

[0006] Among semi-automatic types, the semi-automatic return type is configured to return the blade by manually opening the cover covering the upper part of the blade after the blade moves during optical fiber cutting. This means that the cover must be opened manually to return the blade, and the blade must return before the optical fiber is removed during the return process. This method also has the problem of failure due to wear and tear due to the mechanical contact between the cutting and return movements. Representative products in this category include the CI-02 and CI-03 from UCL Swift in Korea and the CT-50 from Fujikura in Japan.

[0007] In particular, this semi-automatic return type fiber cleaver has a problem where the blade can damage the cut surface of the fiber by passing over it as it returns. Specifically, when the blade automatically returns after cutting the fiber, it moves along the same path it was cut along. However, since the severed fiber has not yet been removed, the blade passes over the cut surface again. This behavior is a problem that occurs in existing semi-automatic return products, and users have consistently raised this issue, but no technical solution has been found.

[0008] A conventional optical fiber cleaver is disclosed in the published patent publication number 10-2008-0069528 (Title of invention: Optical fiber cleaver, Inventor: Toshihiko Honma).

[0009] The purpose of the present invention is to provide an automatic return optical fiber cleaver in which a blade for cutting an optical fiber can automatically return to its original position when an external force is removed after cutting an optical fiber by pressing a cover.

[0010] Another object of the present invention is to provide an automatic return optical fiber cleaver capable of providing power required for movement of a blade in a non-contact manner.

[0011] Another object of the present invention is to provide an automatic return optical fiber cleaver capable of preventing a blade returning to its original position after cutting an optical fiber from contacting the cut surface of the optical fiber.

[0012] An automatic return optical fiber cleaver according to the present invention comprises: a main body having a guide portion formed therein; a blade for cutting an optical fiber; a blade moving module having a first magnet and installed so as to be movable along the guide portion and to which the blade is mounted and fixed; a cover rotatably installed on the main body; a second magnet installed on the cover and arranged to have the same polarity as the first magnet so as to move away from the first magnet when the cover is opened and to move closer to the first magnet when the cover is closed, thereby applying a first repulsive force to the first magnet; And it is configured to include a third magnet that is installed on the cover and has the same polarity as the first magnet so that when the cover is closed, it moves away from the first magnet, and when the cover is opened, it moves closer to the first magnet and applies a second repulsive force to the first magnet, and the cover is closed and opened, and the blade movement module automatically moves forward along the guide and then returns, and the blade moves together with the blade movement module and cuts and returns at least a portion of an optical fiber arranged on the movement path of the blade.

[0013] In some cases, the first magnets may be installed in pairs spaced apart from each other, and the pair of first magnets may include a forward magnet that receives the first repulsive force when approaching the second magnet and advances the blade moving module; and a return magnet that is installed spaced apart from the forward magnets and receives the second repulsive force when approaching the third magnet and returns the blade moving module.

[0014] It is preferable to include a fourth magnet installed in a part of the blade movement module; a fifth magnet installed in the main body and, when brought close to the fourth magnet, applying a first attractive force smaller than the first repulsive force to the fourth magnet; and a sixth magnet installed in the main body at a distance from the fifth magnet and, when brought close to the fourth magnet, applying a second attractive force smaller than the second repulsive force to the fourth magnet.

[0015] In some cases, the fourth magnet may include a return-seating magnet that acts with the fifth magnet and the first force to settle the blade moving module in the return position; and a forward-seating magnet that is installed at a distance from the return-seating magnet and acts with the sixth magnet and the second force to settle the blade moving module in the forward position. The first to sixth magnets may all be permanent magnets, all may be electromagnets, or a combination of permanent magnets and electromagnets.

[0016] It may include a cover opening mechanism installed between the main body and the cover, and which applies a moment to the cover when an external force is removed while the cover is closed, thereby opening the cover.

[0017] Preferably, the optical fiber lifting unit is lowered by the cover being closed and then lifts the optical fiber before the blade moving module returns by the cover being opened so that the optical fiber does not come into contact with the returning blade; and a lifting unit pressurizing unit is installed on the lower surface of the cover and pressurizes the optical fiber lifting unit when the cover is closed so that the height of the optical fiber lifting unit becomes lower than the height of the optical fiber, thereby preventing the optical fiber lifting unit from coming into contact with the optical fiber when cutting the optical fiber, thereby allowing the optical fiber cutting operation to operate normally.

[0018] The above optical fiber lifting unit may be configured to include an optical fiber lift member that is movably installed on the blade moving unit and for lifting the optical fiber; and a spring that elastically supports the optical fiber lift member on the blade moving unit.

[0019] According to the present invention, the optical fiber cutting movement and return movement are performed magnetically in a non-contact manner, so that no wear occurs in the optical fiber cleaver.

[0020] According to the present invention, the use of the optical fiber cleaver is convenient because the blade automatically returns to its original position when the external force is removed after cutting the optical fiber.

[0021] According to the present invention, the blade does not come into contact with the cut optical fiber when returning, so the blade does not damage the surface of the cut optical fiber.

[0022] According to the present invention, when constructing an optical cable network on-site, the speed and connection quality of the work are improved, the convenience of the work is provided, and even unskilled persons can easily use the optical fiber cleaver.

[0023] Figure 1 is a perspective view of an automatic return optical fiber cutting machine according to the present invention;

[0024] Figure 2a is a partially broken perspective view showing the configuration of the automatic return optical fiber cutting machine according to the present invention immediately before the cutting operation for moving the blade.

[0025] Fig. 2b is a plan view showing the arrangement of the magnets in Fig. 2a;

[0026] Fig. 2c is a side view showing the arrangement of the magnets in Fig. 2a;

[0027] Figure 3 is a partially broken perspective view of an automatic return optical fiber cutting machine according to the present invention showing the cutting start state of a blade for cutting an optical fiber.

[0028] Figure 4 is a partially broken perspective view of an automatic return optical fiber cutting machine according to the present invention, showing a state in which the blade has advanced and completed cutting the optical fiber.

[0029] Figure 5 is a drawing showing an example of installation of a damper.

[0030] Figure 6 is a drawing for explaining the return start state of the blade after cutting the optical fiber.

[0031] Figure 7 is a drawing for explaining the state of the blade's return completion.

[0032] Figure 8 is a drawing for explaining the state of the optical fiber lifting unit just before the blade automatically returns.

[0033] Figure 9a is a partially enlarged drawing showing the state in which the optical fiber lifting unit lifts the optical fiber when the blade returns.

[0034] Figure 9b is a plan view showing the positional relationship between the blade and the optical fiber when the blade returns.

[0035] Figure 9c is a front view of Figure 9b;

[0036] Figure 9d is a right side view of Figure 9b;

[0037] Figure 10a is a drawing showing the state of the optical fiber lifting unit just before optical fiber cutting.

[0038] Figure 10b is a plan view showing the positional relationship between the blade and the optical fiber just before cutting the optical fiber.

[0039] Figure 10c is a front view showing the state in which the optical fiber lift member is pressed by the lifting unit pressurizing part.

[0040] Figure 10d is a right side view of Figure 10c;

[0041] Figure 11 is a perspective view showing the state of the optical fiber lifting unit during optical fiber cutting.

[0042] Figure 12 is a perspective view showing the state of the optical fiber lifting unit immediately after optical fiber cutting.

[0043] [Explanation of symbols]

[0044] 10: Optical fiber 110: Main body

[0045] 112: Guidance section 113: Lifting unit pressurization section

[0046] 130: Blade 140: Blade Movement Module

[0047] 141: First magnet 141a: Forward magnet

[0048] 141b: Return magnet 150: Cover

[0049] 151: Support axis 162: Second magnet

[0050] 163: Third magnet 164: Fourth magnet

[0051] 164a: Return-seating magnet 164b: Forward-seating magnet

[0052] 165: 5th magnet 166: 6th magnet

[0053] 170: Cover opening mechanism 172: Torsion spring

[0054] 180: Damper 190: Fiber optic lifting unit

[0055] 192: Fiber optic lift member 194: Spring

[0056] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0057] As shown in FIGS. 1 to 12, the automatic return optical fiber cleaver (100) according to the present invention has a main body (110), a blade (130), a blade moving module (140) having a first magnet (141), a cover (150), a second magnet (162), and a third magnet (163).

[0058] The main body (110) provides a location where each component can be installed in its required location and serves to protect internal components. A guide section (112) is formed in the main body (110) to guide the movement of the blade movement module (140) so that the blade movement module (140) can advance and then return.

[0059] The blade (130) is used to cut the optical fiber (10), and is preferably circular. When a circular blade (130) is used, the blade can be used continuously by cutting a set strand of optical fiber (10) and rotating it by a set angle each time the corresponding part wears out, so that the blade (10) does not have to be replaced for a long time. However, the blade (130) does not necessarily have to be formed in a circular shape. As long as it has a part formed higher than the surroundings so that it can cut at least a part of the optical fiber (10) while performing a reciprocating motion of forward and backward, it can be used as the blade (130) regardless of its shape.

[0060] The blade movement module (140) is installed to move the blade (130) while being fixedly mounted, and is installed to be able to move along the guide (112). The blade (130) is mounted and fixed on this blade movement module (140). A first magnet (141) is provided on this blade movement module (140).

[0061] The first magnet (141) installed in the blade movement module (140) may be formed as one, but is preferably installed as a pair with a gap therebetween. This pair of first magnets (141) may preferably be formed of a forward magnet (141a) that receives a first repulsive force when approaching a second magnet (162) to advance the blade movement module (140), and a return magnet (141b) that is installed spaced apart from the forward magnet (141a) and receives a second repulsive force when approaching a third magnet (163) to return the blade movement module (140).

[0062] In the case of a small automatic return optical fiber cleaver (100) with a short forward and backward distance of the blade movement module (140), the first magnet (141) may be composed of a single magnet. In this case, the N pole may act as a forward magnet (141a) and the S pole may act as a return magnet (141b), or vice versa.

[0063] The cover (150) is installed rotatably on the main body (110) about the support shaft (151). In this embodiment, when the cover (150) is rotated and closed by an external force, the blade movement module (140) moves forward and the blade (130) partially cuts the optical fiber (10), and when the external force is removed from the cover (150), the cover opening mechanism (170) is rotated and automatically opened by the elastic force of the torsion spring (172) or the like, which will be described later, and the blade movement module (140) returns to the original position.

[0064] A second magnet (162) and a third magnet (163) are installed in the cover (150) as above. In this embodiment, the second magnet (162) is installed in the front of the cover (150), on the opposite side of the support shaft (151). When the cover (150) is opened, the second magnet (162) moves away from the first magnet (141), in this embodiment, the forward magnet (141a) forming part of the first magnet (141), and when the cover (150) is closed, the second magnet (162) moves closer to the forward magnet (141a) forming part of the first magnet (141), thereby applying a first repulsive force to the forward magnet (141a). When they approach each other, the second magnet (162) and the forward magnet (141a) are arranged so that the facing portions have the same polarity.

[0065] In this embodiment, the third magnet (163) is installed on the cover (150) opposite to the position where the second magnet (162) is installed, on the side where the support shaft (151) is located. When the cover (150) is closed, the third magnet (163) moves away from the return magnet (141b) that constitutes a part of the first magnet (141) in this embodiment, and when the cover (150) is opened, the third magnet (163) moves closer to the return magnet (141b) that constitutes a part of the first magnet (141). The third magnet (163) is arranged so that when it approaches to apply a second repulsive force to the return magnet (141b), the part facing it has the same polarity as the return magnet (141b).

[0066] Accordingly, in the automatic return optical fiber cleaver (100) according to the present invention, the blade movement module (140) automatically moves forward and returns along the guide unit (112) as the cover (150) closes and opens, and the blade (130) moves together with the blade movement module (140) to repeatedly repeat the process of cutting or damaging a portion of an optical fiber (10) arranged on the movement path of the blade (130) and returning. An appropriate tensile force is applied to the partially cut or damaged optical fiber (10) to cut it.

[0067] Referring to FIGS. 2A to 7, the automatic return optical fiber cleaver (100) according to the present invention may further have a fourth magnet (164), a fifth magnet (165), and a sixth magnet (166). The fourth magnet (164) to the sixth magnet (166) enable the blade movement module (140) to stop, move, and return more stably.

[0068] The fourth magnet (164) is installed in a part of the blade movement module (140), preferably on the side of the blade movement module (140). Preferably, the fourth magnets (164) may be installed in pairs spaced apart from each other. The pair of fourth magnets (164) may be composed of a return-seating magnet (164a) and a forward-seating magnet (164b). The return-seating magnet (164a) acts to settle the blade movement module (140) to the return position by acting on the fifth magnet (165) and the first attractive force.

[0069] The forward settling magnet (164b) is installed at a distance from the return settling magnet (164a) and acts to set the blade movement module (140) in the forward position by applying the sixth magnet (166) and the second manpower.

[0070] The fifth magnet (165) is installed in the main body (110) and, when it approaches the fourth magnet (164), acts to apply a first attractive force smaller than the first repulsive force to the fourth magnet (164).

[0071] The sixth magnet (166) is installed in the main body (110) at a distance from the fifth magnet (165). When the sixth magnet (166) approaches the forward-seating magnet (164b) of the fourth magnet (164), it acts to exert a second attractive force that is smaller than the second repulsive force on the forward-seating magnet (164b).

[0072] Referring to FIGS. 5 to 12, the automatic return optical fiber cleaver (100) according to the present invention may further have a cover opening mechanism (170) for automatically opening the cover (150). The cover opening mechanism (170) is installed between the main body (110) and the cover (150). Preferably, the cover opening mechanism (170) includes a torsion spring (172) installed on the outer surface of the support shaft (151). One end of the torsion spring (172) is supported by the cover (150) and the other end is supported by the main body (110) while being coupled to the outer surface of the support shaft (151), thereby rotating the cover (150) in a direction in which the external force is removed to open it.

[0073] The cover opening mechanism (170) as described above can open the cover (150) by applying a moment to the cover (150) when an external force is removed while the cover (150) is closed.

[0074] The automatic return optical fiber cleaver (100) according to the present invention may be equipped with a damper (180) to prevent impact from being applied to the cover (150) that is rotated and opened by the cover opening mechanism (170). The damper (180) may be configured with a rotation gear (182) that is coupled to a support shaft (151) and rotates together with the cover (150), and a load gear (184) that is installed on the main body (110) and engages with the rotation gear (182) to act as a load.

[0075] Referring to FIGS. 8 to 12, the automatic return optical fiber cleaver (100) according to the present invention preferably has an optical fiber lifting unit (190). The optical fiber lifting unit (190) is lowered by a closing cover (150) and then, when the cover (150) is opened, is raised before the blade moving module (140) returns to lift the optical fiber (10) so that the optical fiber (10) does not come into contact with the returning blade (130).

[0076] The optical fiber lifting unit (190) that performs the above-described role is preferably configured to include an optical fiber lifting member (192) that is installed so as to be able to ascend and descend on the blade moving unit (140) and to lift the optical fiber (10) and a spring (194) that elastically supports the optical fiber lifting member (192) on the blade moving module (140). Since it is sufficient to be able to lift the optical fiber (10) when the blade moving unit (140) returns, the optical fiber lifting unit (190) may of course be installed on the main body (110) at times.

[0077] The automatic return optical fiber cleaver (100) according to the present invention having the above configuration appropriately configures the magnetic forces of the cover opening mechanism (170), the damper (180), and the first to sixth magnets (141) to interact with each other, thereby driving the blade movement module (140) to which the blade (130) is fixed using the magnetic force to cut the optical fiber (10). Thereafter, the cover (150) is automatically opened by the force of the cover opening mechanism (170) whose opening force is adjusted by the damper (180). When the cover (150) is opened, the blade movement module (140) to which the blade (130) is fixed automatically returns to the initial position by the action of the force of the cover opening mechanism (170) adjusted by the damper (180) and the magnetic forces of the first to sixth magnets (141) to (166). When the blade (130) returns, the optical fiber lifting unit (190) is operated to lift the optical fiber (10) upwards so that the blade (130) does not touch the cutting surface of the optical fiber (10).

[0078] The automatic return optical fiber cleaver (100) according to the present invention improves the speed and connection quality of work during field work to construct an optical cable network, provides convenience of work, and allows even unskilled personnel to use it easily. In the automatic return optical fiber cleaver (100) according to the present invention, the movement and return movements of the blade (130) for cutting an optical fiber (10) are performed in a non-contact manner by the action of magnetic force, so that related components do not wear out.

[0079] The blade (130) for cutting the optical fiber (10) is installed in the blade movement module (140) and moves in a straight line to make a fine wound on the optical fiber (10), and then an appropriate tensile force is applied to the optical fiber (10) by the closing cover (150) to cut the optical fiber (10). As shown in FIGS. 2a to 2c, before the cutting operation for cutting the optical fiber (10), the blade (130) is returned, and the blade movement module (140) is stably fixed to the original position or the return position by the return-seating magnet (141a) and the fifth magnet (165) which constitute a part of the fourth magnet (164) whose facing parts have opposite polarities.

[0080] When the cover (150) is pressed in the downward arrow direction of Fig. 3 to cut the optical fiber (10), the optical fiber fixing device (not shown) presses and fixes the optical fiber (10) to be cut. The repulsive force between the forward magnet (141a) and the second magnet (162), which constitute a part of the first magnet (141) of the same polarity, acts greater than the attractive force between the return-seating magnet (164a) and the fifth magnet (165), which constitute a part of the fourth magnet (164) of the opposite polarity, so that the blade moving module (140) moves forward in a linear motion together with the blade (130) toward the sixth magnet (166) or the support shaft (151), and the blade (130) inflicts a fine scratch on the optical fiber (10) and moves to the forward position, which is the cutting completion position, as shown in Fig. 4. At this time, a pressing device (not shown) located on the cover (150) above the optical fiber (10) presses the optical fiber (10) and cuts the optical fiber (10) with tensile force.

[0081] In the above process, when cutting an optical fiber (10), the optical fiber lift member (192) is lowered and when the cover (150) is opened after cutting is completed, it rises higher than the blade (130) and performs an action of lifting the optical fiber (10) higher than the blade (130) when the blade (130) returns.

[0082] That is, when the optical fiber (10) cutting operation is completed, the pressed cover (150) is released. When the external force is removed from the cover (150), the cover (150) automatically opens by the cover opening mechanism (170). The force of the cover opening mechanism (170) is appropriately adjusted by the damper (180) as shown in FIGS. 5 and 6, and the cover (150) automatically opens with the adjusted force.

[0083] The force adjustment for this cover opening mechanism (170) maintains a balance between the force of the cover opening mechanism (170) and the repulsive or repulsive force between the return magnet (141a) and the third magnet (163) that constitute the first magnet (141) having the same polarity as the force of the cover opening mechanism (170), thereby alleviating the shock when the cover (150) is opened and controlling the speed of the opening motion to provide the user with a smooth and natural operation, thereby enabling stable operation.

[0084] Fig. 6 shows that when the cover (150) is opened by the moment applied to the cover opening mechanism (170) by the cover opening mechanism, the return magnet (141b) and the third magnet (163) constituting the first magnet (141) located at the rear come closer. At this time, at the point where the repulsive force between the two magnets of the same polarity that come closer becomes greater than the attractive force between the return magnet (164b) and the sixth magnet (166) constituting the fourth magnet (164), the blade movement module (140) moves to the return position and automatically returns.

[0085] The cover (150) is completely opened by the moment of the cover opening mechanism (170) adjusted by the damper (180), and the blade moving module (140) returns to the original position together with the blade (130) by the repulsive force between the return magnet (141b) and the third magnet (163) constituting the first magnet (141).

[0086] The first magnet (141) to the sixth magnet (166) used in the automatic return optical fiber cleaver (100) according to the present invention may be selectively applied in a method using all permanent magnets, a method using all electromagnets, or a method using both permanent magnets and electromagnets.

[0087] In addition, the opening structure of the cover (150) can be configured by combining a spring and a damper, or by applying a damper-integrated spring, a hinge-type damper, a gas spring, or a cylinder mechanism.

[0088] When the blade moving module (140) automatically returns, the optical fiber lifting unit (190) releases the pressure of the lifting unit pressurization part (113) as the cover (150) is opened by the force of the torsion spring (172), and moves together with the blade moving module (140), and the spring (194) raises the position of the upper part of the optical fiber lifting member (192) higher than the blade (130), thereby lifting the optical fiber (10) higher than the height of the blade (130), thereby preventing the blade (130) from touching the optical fiber (10), thereby protecting the optical fiber (10).

[0089] When the cover (150) is opened and the cover (150) is pressed for cutting the optical fiber (10), the lifting unit pressurizing part (113) installed on the bottom surface of the cover (150) presses the optical fiber lift member (192) of the optical fiber lifting unit (190) downward so that the height of the optical fiber lift unit (190) becomes lower than the height of the optical fiber (10), thereby preventing the optical fiber lifting unit (190) from contacting the optical fiber (10) when cutting the optical fiber (10), thereby allowing the optical fiber (10) cutting operation to operate normally.

[0090] That is, the lifting unit pressurizing portion (113) presses the optical fiber lift member (192) until the blade (130) completely passes through the optical fiber (10), so that the height of the optical fiber lift member (192) is maintained lower than that of the optical fiber (10), thereby allowing cutting of the optical fiber (10), and immediately after the cutting of the optical fiber (10) is completed, the optical fiber lift member (192) is released from the lifting unit pressurizing portion (113), and the optical fiber lift member (192) maintains its original height.

[0091] Instead of a compression coil spring, other springs such as a plate spring or a gas spring may be used as the spring (194) used for the elevation of the optical fiber lift member (192). In some cases, a highly elastic plastic may be used instead of the optical fiber lift member (192) and the spring (194). Furthermore, a magnet may be used instead of the spring (194), such as a coil compression spring, for the elevation of the optical fiber lift member (192).

[0092] The present invention has the potential to be used in the manufacture of optical fiber cleavers. In particular, the present invention has the potential to be used in the manufacture of optical fiber cleavers used to cut optical fibers required for tasks such as the construction of optical communication networks.

Claims

1. Main body with guide section formed; Blade for cutting optical fiber; A blade movement module having a first magnet and installed so as to be movable along the guide section, and on which the blade is mounted and fixed; A cover rotatably installed on the above main body; A second magnet installed on the cover and arranged to have the same polarity as the first magnet so that when the cover is opened, it moves away from the first magnet, and when the cover is closed, it moves closer to the first magnet and applies a first repulsive force to the first magnet; and It is configured to include a third magnet having the same polarity as the first magnet so that when the cover is closed, it moves away from the first magnet and when the cover is opened, it moves closer to the first magnet and applies a second repulsive force to the first magnet. An automatic return optical fiber cleaver characterized in that the blade movement module automatically advances and returns along the guide section when the cover is closed and opened, and the blade moves together with the blade movement module, cutting and returning at least a portion of an optical fiber arranged on the movement path of the blade.

2. In the first paragraph, the first magnets are installed in pairs with a gap between them, and the pair of first magnets are A forward magnet that receives the first repulsive force when it approaches the second magnet and advances the blade movement module; and An automatic return optical fiber cleaver characterized by including a return magnet that is installed spaced apart from the forward magnet and receives a second repulsive force when brought close to the third magnet to return the blade movement module.

3. In paragraph 1 or 2, a fourth magnet installed on one part of the blade movement module; A fifth magnet installed in the main body and, when approaching the fourth magnet, exerts a first attractive force smaller than the first repulsive force on the fourth magnet; An automatic return optical fiber cleaver characterized by including a sixth magnet installed in the main body at a distance from the fifth magnet and applying a second attractive force smaller than the second repulsive force to the fourth magnet when it approaches the fourth magnet.

4. In the third paragraph, the fourth magnet, A return-seating magnet that places the blade movement module in a return position by applying the fifth magnet and the first manpower; and It includes a forward settling magnet installed at a distance from the return settling magnet and applying the sixth magnet and the second manpower to set the blade movement module in the forward position. An automatic return optical fiber cleaver characterized in that the first to sixth magnets are all permanent magnets, all electromagnets, or a combination of permanent magnets and electromagnets.

5. An automatic return optical fiber cleaver characterized in that it includes a cover opening mechanism installed between the main body and the cover in the first paragraph, and which opens the cover by applying a moment to the cover when an external force is removed while the cover is closed.

6. In any one of the first, second and fifth paragraphs, an optical fiber lifting unit that lifts the optical fiber before the blade moving module returns by the cover being opened after being lowered by the cover being closed, thereby preventing the optical fiber from contacting the returning blade; and An automatic return optical fiber cleaver characterized by including a lifting unit pressurizing unit installed on the lower surface of the cover and pressurizing the optical fiber lifting unit when the cover is closed so that the height of the optical fiber lifting unit becomes lower than the height of the optical fiber, thereby preventing the optical fiber lifting unit from contacting the optical fiber during optical fiber cutting, thereby allowing the optical fiber cutting operation to operate normally.

7. In the 6th paragraph, the optical fiber lifting unit, An optical fiber lift member that is installed to be able to be lifted on the blade moving unit and for lifting the optical fiber; and An automatic return optical fiber cleaver characterized in that it includes a spring that elastically supports the optical fiber lift member to the blade moving unit.

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