One-step pressing type optical fiber cutting knife based on elastic blade sliding block structure

Abstract

The utility model provides a one-step pressing type optical fiber cutting knife based on an elastic blade sliding block structure. Comprising an elastic blade sliding block, a deflector rod pressing arm, a warping plate and the like. On the basis of the design of an existing one-step pressing type optical fiber cutting knife, the elastic blade structure sliding block is adopted, the shifting rod pressing arm structure is improved, the warping plate structure is adopted to lock and release the sliding block, the requirements of the one-step pressing type optical fiber cutting knife for the precision and strength of structural parts are lowered, the locking and releasing structure is optimized, parts are reduced, and the cost is reduced. The all-plastic structural member can also meet the technical requirements of the one-step pressing type optical fiber cutting knife, so that the cost of one-step pressing type optical fiber cutting is reduced, and market popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of optical fiber cutters for engineering construction, in particular to an optical fiber cutter which uses a hard material blade to scratch the outer cylindrical surface of an optical fiber and then pulls or knocks off the optical fiber along the scratched incision to form an optical fiber end face that meets engineering standards. Technical Background

[0002] Optical fiber has been widely used in communication, medical treatment, sensors, navigation, and other fields. The main material for making optical fiber is high-purity quartz. Common optical fiber is a solid core structure with a slight difference in the refractive index of the core and the shell material. Light propagates in the core. In order to ensure the linearity and low loss of the transmission channel at the connection point, special methods are required to connect the optical fibers. Currently, there are two main methods used in the engineering field: one is physical alignment connection, which is to accurately align and fix the core and shell of the optical fiber to be connected, which is called cold connection; the other is to further heat a group of optical fibers after precise alignment at high temperature to reach the melting point of the optical fiber material to fuse the two core optical fibers, which is called fusion splicing;

[0003] The radial cross-section of the optical fiber must be planarized before cold splicing or fusion splicing. Only in this way can the radial cross-sections of the optical fibers fit together as closely as possible when they are aligned, and light can be transmitted effectively. In the field of optical fiber communication engineering applications, this end face processing tool for optical fiber is an optical fiber cutter. The principle is: use a high-hardness sharp blade to scratch the outer circle of the optical fiber radially, the purpose is to form a flat incision as perpendicular to the optical fiber axis as possible, and then apply external force to expand along the incision direction until the optical fiber breaks; the existing engineering construction uses a metal guide rail optical fiber cutter to scratch the optical fiber in the following way: completely fix the circular blade on the slider, the slider is fixed on one side of the linear guide rail, and the other side of the linear guide rail is fixed on the optical fiber cutter base, and the linear guide slider is pushed to make a linear motion. The circular blade edge scratches the optical fiber radially at a fixed height to form an incision; the usual operation steps are to fix the optical fiber downward, push the slider to scratch and break the optical fiber, and take out the optical fiber; such steps need to be performed step by step by the operator each time, which is inefficient on the one hand and easy to fatigue on the other hand. In order to solve this problem, a one-step pressing optical fiber cutter is designed. The specific method is to fix the optical fiber downward (i.e., the operation action of pressing down to fix the optical fiber) in the vertical direction. While retaining the original operation effect of pressing and holding the optical fiber, through the mechanical structure design, some functions are decomposed into water The slider is driven and released in the horizontal direction to scratch and break the optical fiber to form a qualified incision, and it is automatically reset under the force of the torsion spring opposite to the pressing direction; in this way, the operator only needs to aim at the optical fiber and complete the downward pressing action to complete the three-step process of fixing the optical fiber, scratching the optical fiber, and breaking the scratched wound, which greatly improves the operating efficiency, and because of its simple operation, it can support one-handed operation; although the one-step pressing optical fiber cutting knife for engineering has existed for many years and has the above-mentioned benefits and is widely welcomed by the market, its structure is more complex and the requirements for the precision and strength of the structural parts are higher, which leads to this This type of fiber optic cutter has high cost and low popularity. Take the popular one-step push-type fiber optic cutter with a lever-driven slider as an example. Under the force of the torsion spring installed between the upper cover and the base, the upper cover is automatically lifted after being pressed. During the lifting process, the lever fixed to the lower part of the upper cover pushes the slider to the cutting preparation position and is locked by the lock on the base. When the upper cover is pressed down, the pressure arm inside the upper cover presses the optical fiber and continues to press down the upper cover. The protrusion inside the upper cover unlocks the lock on the base and releases the slider. Under the force of the tension spring, the slider scratches and breaks the optical fiber during the reset process. This design has the following problems:

[0004] 1. A circular fixed-height blade structure is used, which has high requirements on the strength and precision of the structural parts. It needs to be processed by metal materials (usually hard aluminum) using CNC milling or precision casting technology, resulting in high production costs.

[0005] 2. In the existing design, the lever pressure arm is two separate structural parts, which are combined and used by screws when in use. This method increases the number of spare parts and also increases the assembly workload.

[0006] 3. Use a spring to support the spring pin and insert it into the base positioning hole to position and lock the slider. When releasing, the upper cover protrusion presses down another spring pin structure to push the locking spring pin downward to achieve the purpose of unlocking. This structure is composed of at least six parts, with more structural parts and more complicated assembly. The unlocking spring pin protrudes upward from the base surface for a long distance, which also affects the smoothness of the appearance.

[0007] 4. In the existing design, the slider is inside the base and is completely wrapped by the base structure except in the cutting direction. The broken fibers after cutting can easily fall into the cavity where the slider is located. When accumulated, it will seriously interfere with the normal movement of the slider and affect its use. Summary of the invention

[0008] In view of the above-mentioned issues, the purpose of the utility model is to provide a one-step push-type optical fiber cutter based on an elastic blade slider structure, and its core value is: combining an elastic optical fiber cutter slider technology of an optical fiber cutter slider using an elastic blade bracket (Chinese Patent 201911401085.3), and an improved technology of an elastic optical fiber cutter slider in an adjustable blade seat height optical fiber cutter elastic blade slider (Chinese Patent 202420375999.7), with the existing one-step push-type optical fiber cutter structure to form a new type of optical fiber cutter. Since the above-mentioned elastic blade structure itself is different from a fixed-height optical fiber cutter and has an elastic structural gap, the gap accuracy of the peripheral structural parts has a lower impact on the elastic blade structure. In practice, the inventor used a plastic structure to make a sample that achieved a cutting effect consistent with a metal one-step push-type optical fiber cutter, which also confirms this point.

[0009] Technical Solution

[0010] A one-step pressing type optical fiber cutting knife based on an elastic blade slider structure, characterized in that;

[0011] The one-step pressing type optical fiber cutter is provided with an elastic blade support optical fiber cutter slider, and the surface of the elastic blade support optical fiber cutter slider is processed with a protruding slider position;

[0012] The one-step pressing type optical fiber cutting knife also has a base;

[0013] A cavity is formed in the base, a linear guide rail is installed on the side wall of the cavity, an optical fiber to be cut is placed on the surface of the base, and the movement direction of the linear guide rail is the radial direction of the optical fiber to be cut;

[0014] The elastic blade support optical fiber cutting knife slider is installed on the linear guide rail, and the linear guide rail drives the elastic blade support optical fiber cutting knife slider to move in the radial direction of the optical fiber to be cut;

[0015] The base is also equipped with a seesaw; the seesaw is pivotally mounted in the base cavity, the seesaw uses the mounting pivot as a fulcrum, one end of the seesaw passes upward through the base surface, the base surface is provided with a hole that matches the appearance of the passing surface, and the other end contacts downward with the surface of the elastic blade holder optical fiber cutter slider mounted on the linear guide rail, a seesaw spring is installed between the upper part of the lower end of the seesaw and the mounting axis fulcrum, the seesaw spring is a compression spring, which pushes the seesaw downward, and under the pressure of the compression spring, when the elastic blade holder optical fiber cutter slider moves to one end of the base cavity, the lower end of the seesaw falls into the slider clamping position, at this time, the elastic blade holder optical fiber cutter slider cannot move;

[0016] An upper cover is also pivotally mounted above the base, a lever pressure arm is mounted inside the upper cover, the lever pressure arm and the upper cover share the same mounting pivot, and the lever pressure arm moves downward in an arc with the upper cover mounting pivot as a fulcrum to press the optical fiber to be cut;

[0017] The upper cover is provided with a seesaw spring fixing screw in a direction corresponding to the upward end of the seesaw, and the height between the seesaw spring fixing screw and the upper cover is adjustable. When the upper cover moves downward in an arc, the seesaw spring fixing screw installed thereon pushes the seesaw upward and drives the seesaw downward with the seesaw axis as a fulcrum to lift upward. At this time, the seesaw downward end leaves the elastic blade bracket optical fiber cutter slider position upward, releasing the movement limit of the elastic blade bracket optical fiber cutter slider. At this time, the elastic blade bracket optical fiber cutter slider can move.

[0018] The lever pressing arm is an integral structural member having lever and arm pressing functions;

[0019] The lever part of the lever pressure arm is located in the base cavity. When the lever pressure arm is lifted upward, the lever pushes the slider of the elastic blade support optical fiber cutter to a position where the slider can be dropped into the slider position by the lower end of the seesaw. At this time, the slider of the elastic blade support optical fiber cutter cannot move.

[0020] The lever pressing arm is partially located in the upper cover, and when the lever pressing arm is pressed downward, the pressing arm cooperates with the base to clamp the optical fiber to be cut;

[0021] The base also has a base cover, which is pivotally mounted below the base cavity. An attraction magnet is mounted below the base cavity, and the base cover is also mounted with an attraction magnet. After being attracted to the base magnet, the base cover is in a closed state to seal the lower cavity of the base.

[0022] The one-step push-type optical fiber cutting knife based on the elastic blade slider structure is also equipped with an optical fiber fixing clamp and a fiber collection box. The optical fiber fixing clamp is used for preliminarily fixing and limiting the cut optical fiber, and the fiber collection box is used for collecting the broken optical fiber after cutting.

[0023] The utility model has the following beneficial effects

[0024] 1. The elastic blade assembly slider is used as the optical fiber scratching structure of the utility model, which fully utilizes the characteristics of the elastic blade structure that is insensitive to the optical fiber position fixing result and the optical fiber fixing structure strength, thereby reducing the strength and precision requirements for the one-step push-type optical fiber cutting knife structure. After actual testing, the overall structure is processed and formed by a plastic mold to meet the technical requirements, and the deformation of the plastic parts has a small impact on the cutting effect. The cutting effect is consistent with the existing metal one-step push-type optical fiber cutting knife, which meets the design requirements, thereby reducing costs and facilitating market popularization.

[0025] 2. The utility model optimizes the lever and the pressure arm, which are two parts used in combination, into one structural part, thereby reducing the number of structural parts and the assembly workload.

[0026] 3. The utility model adopts a newly designed seesaw structure, which reduces the number of locking and releasing structural parts to four, and the unlocking position is flush with the base surface, without a raised design, thereby optimizing the appearance.

[0027] 4. The utility model designs the base cover plate as an openable structure, which can timely, conveniently and effectively clean the residual broken fibers accumulated inside, thereby avoiding interference of the residual broken fibers on cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings;

[0029] Figure 1 The front view of a one-step push-type optical fiber cleaver based on an elastic blade slider structure;

[0030] Figure 2 The bottom view of a one-step push-type optical fiber cleaver based on an elastic blade slider structure;

[0031] Figure 3 A one-step pressing optical fiber cutting knife lever pressing arm view based on an elastic blade slider structure;

[0032] Figure 4 It is a one-step pressing type optical fiber cutting knife seesaw illustration based on the elastic blade slider structure;

[0033] Figure markings: 1. Upper cover, 11. Upper cover screw, 2. Lever pressure arm, 21. Lever pressure arm protrusion, 3. Base, 31. Base cover, 32. Base cover attraction magnet, 4. Fiber collection box, 5. Elastic blade bracket optical fiber cutting knife slider, 51. Slider clamp, 52. Slider fixing screw hole, 53. Slider tension spring, 6. Clamp, 7. Rocker, 71. Rocker spring fixing screw, 72. Rocker spring, 73. Rocker shaft, 8. Optical fiber, 9. Linear guide. DETAILED DESCRIPTION

[0034] Figure 1 The front view of a one-step push-type optical fiber cutter based on an elastic blade slider structure; the upper cover 1 is located above the base 3, and the upper cover screw 11 is installed in the upper cover 1, in the lower left opening, and the height is adjustable. When the upper cover 1 is pressed down, the rocker 7 is triggered to move upward to release the locked elastic blade bracket optical fiber cutter slider 5 (for further reference Figure 4 Description), when the elastic blade holder optical fiber cutting knife slider 5 is released, under the force of the slider tension spring, the optical fiber 8 is scratched and broken in the direction of the arrow shown in the figure; the clamp 6 is a finished product of the existing design, and its function is to pre-fix and limit the optical fiber 8 to be cut. The fiber collection box 4 is also a finished product of the existing design. The upper cover can be opened to collect the broken optical fiber after cutting for centralized processing. It can be seen from this view that the elastic blade holder optical fiber cutting knife slider 5 is different from the existing fixed height circular blade design. It is an elastic blade structure (its specific design reference patent number is Chinese patent 202420375999.7 design). Since the blade of this structure is an elastic active structure, it is inevitable to have a certain structural gap. Therefore, there is more design redundancy for the gap of the matching structure. The actual effect brought about by this is that the structural requirements are lower than the existing circular blade fixed height design. In practice, it can be implemented with plastic structural parts, thereby reducing the product cost; in addition, the seesaw 7 can be observed, and the shown part is the exposed part of the seesaw upward end, and its surface is basically flat with the surface of the base 3, which does not affect the overall appearance.

[0035] Figure 2 The present invention is a bottom view of a one-step push-type optical fiber cutter based on an elastic blade slider structure; the view shows the base cover 31 in the open state, the elastic blade holder optical fiber cutter slider 5 is fixed to the base 3 and the inner wall of the cavity by a linear guide 9, the slider tension spring 53 provides tension for the elastic blade holder optical fiber cutter slider 5 to reset the scratched optical fiber, the base cover 31 is pivotally fixed to the base 3 at one end and can be opened and closed. When closed, the base cover 32 fixed to the base cover 31 and the base 3 attracts magnets to fix the base cover 31. When it is necessary to remove the internal residual fiber, the base cover 31 can be opened to remove the residual fiber, so as to achieve the purpose of preventing the residual optical fiber from accumulating and interfering with the cutting.

[0036] Figure 3 The utility model discloses a one-step pressing type optical fiber cutting knife lever pressure arm view based on the elastic blade slider structure; the existing design of the lever and the pressure arm on the market are two parts respectively, which are fixed together with screws when in use, thus increasing the number of structural parts and the assembly process. The utility model designs the two structural parts into one structural part, namely the lever pressure arm 2, the upper part is the pressure arm, on which a rubber pad is installed, which cooperates with the rubber pad on the base to hold the optical fiber when the upper cover is pressed down, and the lower part is the lever, which functions to push the slider along the linear guide rail to the release position and lock it when the upper cover is lifted. The lever 21 is raised, which is the surface in direct contact with the slider, and a bearing can also be installed at this position to reduce the contact friction.

[0037] Figure 4 The optic fiber cleaver slider 5 of the one-step pressing type is illustrated in the figure; the right figure of this figure is the AA cross-sectional view of the left figure, and it can be seen that the seesaw 7 is a strip structure in the left and right directions, with a hole, and the seesaw shaft 73 passes through the hole to fix the seesaw 7 to the base 3. In the cavity, a seesaw spring 71 fixing screw is installed above the base 3, and a seesaw spring 72 is also installed between the seesaw spring 71 fixing screw and the seesaw 7; the seesaw spring 72 is a compression spring installed on the right side of the seesaw shaft 73, and pushes the right side of the seesaw 7 downward so that the rightmost end contacts the upper surface of the elastic blade holder optical fiber cleaver slider 5; when the elastic blade holder optical fiber cleaver slider 5 moves to the illustrated position under the push of the lever, the rightmost end of the seesaw 7 is under the pressure of the seesaw spring 72, and moves to the illustrated position according to the double-directional arrow in the figure. The slider 51 falls downward into the slider position 51, locking the elastic blade holder optical fiber cutting knife slider 5 and preventing it from moving; when the upper cover 1 is pressed down, the upper cover screw 11 installed on it presses the seesaw 7 downward in the direction of the curved arrow on the left, and the left side is upward. At this time, the seesaw 7 makes a seesaw motion with the seesaw shaft 73 as a fulcrum, and the right side is lifted upward in the upward direction of the double arrow on the right side, releasing the elastic blade holder optical fiber cutting knife slider 5, and it moves to the left under the force of the slider tension spring 53. This movement process completes the scratching and breaking of the optical fiber operation. The elastic blade holder optical fiber cutting knife slider 5 is installed on the linear guide through the two slider 52 fixing screw holes. It should be noted that in the utility model, the slider can be installed on the linear guide to complete the operation, and the sleeve and shaft can also be used to complete the linear motion operation.

Claims

1. A one-step pressing optical fiber cleaver based on an elastic blade slider structure, characterized in that; The one-step pressing type optical fiber cutter is provided with an elastic blade support optical fiber cutter slider, and the surface of the elastic blade support optical fiber cutter slider is processed with a protruding slider position; The one-step pressing type optical fiber cutting knife also has a base; A cavity is formed in the base, a linear guide rail is installed on the side wall of the cavity, an optical fiber to be cut is placed on the surface of the base, and the movement direction of the linear guide rail is the radial direction of the optical fiber to be cut; The elastic blade support optical fiber cutting knife slider is installed on the linear guide rail, and the linear guide rail drives the elastic blade support optical fiber cutting knife slider to move in the radial direction of the optical fiber to be cut; The base is also equipped with a seesaw; the seesaw is pivotally mounted in the base cavity, the seesaw uses the mounting pivot as a fulcrum, one end of the seesaw passes upward through the base surface, the base surface is provided with a hole that matches the appearance of the passing surface, and the other end contacts downward with the surface of the elastic blade holder optical fiber cutter slider mounted on the linear guide rail, a seesaw spring is installed between the upper part of the lower end of the seesaw and the mounting axis fulcrum, the seesaw spring is a compression spring, which pushes the seesaw downward, and under the pressure of the compression spring, when the elastic blade holder optical fiber cutter slider moves to one end of the base cavity, the lower end of the seesaw falls into the slider clamping position, at this time, the elastic blade holder optical fiber cutter slider cannot move; An upper cover is also pivotally mounted above the base, a lever pressure arm is mounted inside the upper cover, the lever pressure arm and the upper cover share the same mounting pivot, and the lever pressure arm moves downward in an arc with the upper cover mounting pivot as a fulcrum to press the optical fiber to be cut; The upper cover is provided with a seesaw spring fixing screw in a direction corresponding to the upward end of the seesaw, and the height between the seesaw spring fixing screw and the upper cover is adjustable. When the upper cover moves downward in an arc, the seesaw spring fixing screw installed thereon pushes the seesaw upward and drives the seesaw downward with the seesaw axis as a fulcrum to lift upward. At this time, the seesaw downward end leaves the elastic blade bracket optical fiber cutter slider position upward, releasing the movement limit of the elastic blade bracket optical fiber cutter slider. At this time, the elastic blade bracket optical fiber cutter slider can move. The lever pressing arm is an integral structural member having lever and arm pressing functions; The lever part of the lever pressure arm is located in the base cavity. When the lever pressure arm is lifted upward, the lever pushes the slider of the elastic blade support optical fiber cutter to a position where the slider can be dropped into the slider position by the lower end of the seesaw. At this time, the slider of the elastic blade support optical fiber cutter cannot move. The lever pressing arm is partially located in the upper cover, and when the lever pressing arm is pressed downward, the pressing arm cooperates with the base to clamp the optical fiber to be cut; The base also has a base cover, which is pivotally mounted below the base cavity. An attraction magnet is mounted below the base cavity, and the base cover is also mounted with an attraction magnet. After being attracted to the base magnet, the base cover is in a closed state, sealing the lower cavity of the base.

2. According to claim 1, a one-step pressing optical fiber cleaver based on an elastic blade slider structure, It is characterized by: The one-step push-type optical fiber cutting knife based on the elastic blade slider structure is also equipped with an optical fiber fixing clamp and a fiber collection box. The optical fiber fixing clamp is used for preliminarily fixing and limiting the cut optical fiber, and the fiber collection box is used for collecting the broken optical fiber after cutting.

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