An autofocus mechanism for an end-face detection device of an optical fiber connector

Abstract

The present invention discloses an autofocus mechanism for an end-face detection device of an optical fiber connector, comprising: a sleeve; a driving member mounted on the sleeve; a lens barrel mounted within the sleeve, a lens being provided within the lens barrel, and an elastic reset member being mounted on the lens barrel. The lens barrel is driven by the driving member to move in a first direction, and is driven by the elastic reset member to move in a second direction opposite to the first direction. In the present invention, the lens is driven by the driving member to move in the first direction and is driven by the elastic reset member to move in the second direction, so as to achieve autofocus without manual operation, liberate the labor force and improve the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber connectors, and more particularly to an autofocus mechanism for an end face detection device of an optical fiber connector. Background Art

[0002] In the production process of optical fiber connectors, in order to improve the quality of optical fiber connections, it is necessary to precisely detect the end face position of the optical fiber connector to detect and discover quality defects such as dirt and scratches on the end face of the optical fiber connector that seriously affect the use quality of the optical fiber connector. At present, the end face detection of optical fiber connectors is completed by manual focusing. However, manual focusing not only takes time and effort, but also has low detection efficiency and low detection accuracy. Summary of the Invention

[0003] The features and advantages of the present invention are partially stated in the following description, or are obvious from the description, or can be learned by practicing the present invention.

[0004] The purpose of the present invention is to provide an autofocus mechanism for an end face detection device of an optical fiber connector, which can achieve autofocus and liberate labor.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: An autofocus mechanism for an end face detection device of an optical fiber connector includes:

[0006] A sleeve;

[0007] A driving member, which is installed on the sleeve;

[0008] A lens barrel, the lens barrel is installed in the sleeve, a lens is provided in the lens barrel, and an elastic reset member is installed on the lens barrel. The lens barrel is driven by the driving member to move in a first direction, and the lens barrel is driven by the elastic reset member to move in a second direction opposite to the first direction.

[0009] The autofocus mechanism further includes a guide rail and a push rod. The guide rail is installed on the sleeve, the push rod is slidably installed on the guide rail, the driving member drives the push rod to move, and the movement of the push rod drives the lens barrel to move.

[0010] The driving member is a linear motor, and the output shaft of the linear motor contacts the push rod.

[0011] The push rod includes a main body and a push arm provided on the main body. The output shaft of the linear motor contacts the main body. An extension arm is provided on the lens barrel. The sleeve is provided with a first groove and a second groove that communicate with each other. The push arm is placed in the first groove and can slide in the first groove. The extension arm is placed in the second groove and can slide in the second groove. The push arm contacts the extension arm.

[0012] The push rod includes two push arms arranged at intervals. The lens barrel is provided with two extension arms at intervals. The sleeve is provided with two first grooves and two second grooves. One push arm is placed in one first groove, one extension arm is placed in one second groove, and one push arm contacts one extension arm.

[0013] The lens barrel includes a first part and a second part. The first part contacts the second part. The push rod contacts the first part. The lens is provided at one end of the second part. A first annular protrusion is provided at the other end of the second part. A second annular protrusion is provided on the inner wall of the sleeve. The elastic reset member is located between the first annular protrusion and the second annular protrusion.

[0014] The elastic reset member is a spring.

[0015] The sleeve includes a first connecting portion, a second connecting portion, and a third connecting portion connected in sequence. An installation interface is provided on the third connecting portion.

[0016] The guide rail is fixed to the sleeve by screws.

[0017] The autofocus mechanism further includes two photoelectric sensors and a light-shielding sheet. The two photoelectric sensors are arranged at intervals in the moving direction of the lens barrel. The light-shielding sheet is driven by the driving member to move in the first direction. The light-shielding sheet is driven by the elastic reset member to move in the second direction opposite to the first direction, and the movement range of the light-shielding sheet is between the two photoelectric sensors.

[0018] In the present invention, the lens is driven by the driving member to move in the first direction and is driven by the elastic reset member to move in the second direction, so that autofocus can be realized without manual operation, liberating the labor force and improving the detection efficiency. Description of the Drawings

[0019] The present invention will be specifically described below with reference to the drawings and in combination with examples. The advantages and implementation manners of the present invention will become more obvious. The content shown in the drawings is only used for the explanation of the present invention and does not constitute any limitation to the present invention. In the drawings:

[0020] Figure 1 is a structural diagram of the autofocus mechanism in an embodiment of the present invention;

[0021] Figure 2 Explosion diagram of the autofocus mechanism in the embodiment of the present invention;

[0022] Figure 3 Cross-sectional view of the autofocus mechanism in the embodiment of the present invention. Specific implementation manner

[0023] As Figures 1 to 3 Shown in the figure, the autofocus mechanism of the fiber optic connector end face detection device proposed in the embodiment of the present invention includes a sleeve 1, a driving member, and a lens barrel 12. In this embodiment, the driving member is a linear motor 6, and the linear motor 6 is installed on the sleeve 1. The lens barrel 12 is installed inside the sleeve 1, a lens 17 is provided inside the lens barrel, an elastic reset member is installed on the lens barrel 12, the lens barrel 12 is driven by the linear motor 6 to move in the first direction, and the lens barrel 12 is driven by the elastic reset member to move in the second direction opposite to the first direction. The lens is driven by the driving member to move in the first direction and the lens is driven by the elastic reset member to move in the second direction, so that autofocus can be realized without manual operation, liberating labor and improving the detection efficiency.

[0024] In this embodiment, the elastic reset member is a spring 16.

[0025] A camera is installed on the sleeve 1. One end of the sleeve 1 is installed with a camera, and the other end of the sleeve 1 is installed with an interface 5. The sleeve 1 includes a first connection portion 2, a second connection portion 3, and a third connection portion 4 connected in sequence. The interface 5 is installed on the third connection portion 4, the workpiece to be measured 20 is inserted into the interface 5, and the linear motor 6 is fixed on the first connection portion 2 of the sleeve 1.

[0026] The lens barrel includes a first part 13 and a second part 14. The first part 13 is in contact with the second part 14. The push rod is in contact with the first part 13 of the lens barrel. The lens 17 is provided at one end of the second part 14 of the lens barrel. A first annular protrusion 51 is provided at the other end of the second part 14 of the lens barrel, and a second annular protrusion 41 is provided on the inner wall of the third connection portion 4 of the sleeve. The spring 16 is located between the first annular protrusion 51 and the second annular protrusion 41. The lens barrel is combined in two sections, which is simple to process.

[0027] The autofocus mechanism further includes a guide rail 8 and a push rod. The guide rail 8 is fixed on the first connection portion 2 of the sleeve by screws. The push rod is slidably installed on the guide rail 8. The driving member drives the push rod to move, and the movement of the push rod drives the lens barrel to move. Here, the output shaft 7 of the linear motor 6 is in contact with the push rod, and the push rod is in contact with the first part 13 of the lens barrel. Installing the push rod on the guide rail 8 ensures the smoothness of the lens during movement, thereby realizing high-precision focusing.

[0028] The push rod includes a main body 10 and a push arm 11 provided on the main body 10. The output shaft 7 of the linear motor 6 contacts the main body 10. An extension arm 15 is provided on the first part 13 of the lens barrel. A first groove 18 and a second groove 19 that communicate with each other are provided on the first connecting portion 2 of the sleeve. The push arm 11 is placed in the first groove 18 and can slide within the first groove 18. The extension arm 15 is placed in the second groove 19 and can slide within the second groove 19. The push arm 11 contacts the extension arm 15. Due to the elastic force of the spring, the push rod, the first part 13 of the lens barrel, and the second part 14 of the lens barrel are tightly connected to eliminate gaps and achieve high-precision focusing.

[0029] In this embodiment, the push rod includes two push arms 11 arranged at intervals up and down. Two extension arms 15 are provided on the lens barrel at intervals up and down. Two first grooves 18 and two second grooves 19 are provided on the first connecting portion 2 of the sleeve. One push arm 11 is placed in one first groove 18, one extension arm 15 is placed in one second groove 19, and one push arm 11 contacts one extension arm 15. By providing two push arms 11 and two extension arms 15, the movement is made more stable.

[0030] As Figure 1 and Figure 2 shown, the autofocus mechanism further includes two photoelectric sensors and a light shield 24. The two photoelectric sensors are a first photoelectric sensor 22 and a second photoelectric sensor 23. The first photoelectric sensor 22 and the second photoelectric sensor 23 are fixed on a connecting plate 21, and the connecting plate 21 is fixed on the first connecting portion 2. The first photoelectric sensor 22 and the second photoelectric sensor 23 are arranged at intervals in the moving direction of the lens barrel 12. The light shield 24 is driven by the linear motor 6 to move in a first direction, and the light shield 24 is driven by a spring 16 to move in a second direction opposite to the first direction, and the movement range of the light shield 24 is between the first photoelectric sensor 22 and the second photoelectric sensor 23. In this embodiment, the light shield 24 is L-shaped. One straight arm of the light shield 24 is connected to the main body 10, and the other straight arm of the light shield 24 extends into the space between the first photoelectric sensor 22 and the second photoelectric sensor 23 and moves between the first photoelectric sensor 22 and the second photoelectric sensor 23. By providing two photoelectric sensors and a light shield, the movement range of the lens barrel is restricted to ensure that when the linear motor drives the lens barrel to move, it does not exceed the positions where the two photoelectric sensors are located, ensuring the safety of the device. If it exceeds the positions where the two photoelectric sensors are located, the device will be damaged.

[0031] The linear motor 6 drives to push the push rod to move rightward on the guide rail 8, and then drives the first part 13 of the lens barrel to move through the push arm 11, and further drives the second part 14 of the lens barrel to move. Since the second part 14 of the lens barrel moves, the lens 17 is driven to move rightward, and the restoring force of the spring 16 causes the lens 17 to move leftward, so as to achieve front-end surface focusing on the measured part 11 inserted into the interface 10 and form an image in the camera, thereby realizing automatic focusing, liberating the labor force and improving the detection efficiency.

[0032] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Those skilled in the art can implement the present invention in various variant embodiments without departing from the scope and essence of the present invention. For example, the features shown or described as part of one embodiment can be used in another embodiment to obtain another embodiment. The above are only the preferred and feasible embodiments of the present invention, and thus do not limit the scope of the rights of the present invention. All equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of the rights of the present invention.

Claims

1. An autofocus mechanism for an end-face detection device of an optical fiber connector, characterized in that, Comprising: A sleeve; A driving member, which is mounted on the sleeve; A lens barrel, the lens barrel is mounted inside the sleeve, a lens is provided inside the lens barrel, an elastic reset member is mounted on the lens barrel, the driving member drives the lens barrel to move in a first direction, and the elastic reset member drives the lens barrel to move in a second direction opposite to the first direction; The autofocus mechanism further includes a guide rail and a push rod, the guide rail is mounted on the sleeve, the push rod is slidably mounted on the guide rail, the driving member drives the push rod to move, and the movement of the push rod drives the lens barrel to move; the driving member is a linear motor, and the output shaft of the linear motor contacts the push rod; The push rod includes a main body and a push arm provided on the main body, the output shaft of the linear motor contacts the main body, an extension arm is provided on the lens barrel, a first groove and a second groove are provided on the sleeve in communication, the push arm is placed in the first groove and can slide in the first groove, the extension arm is placed in the second groove and can slide in the second groove, and the push arm contacts the extension arm; The push rod includes two push arms arranged at intervals, two extension arms are arranged on the lens barrel at intervals, two first grooves and two second grooves are provided on the sleeve, one push arm is placed in one first groove, one extension arm is placed in one second groove, and one push arm contacts one extension arm; The lens barrel includes a first part and a second part, the first part contacts the second part, the push rod contacts the first part, the lens is provided at one end of the second part, a first annular protrusion is provided at the other end of the second part, a second annular protrusion is provided on the inner wall of the sleeve, and the elastic reset member is located between the first annular protrusion and the second annular protrusion; the elastic reset member is a spring; The linear motor drives the push rod to move rightward on the guide rail, and then drives the first part of the lens barrel to move through the push arm, and then drives the second part of the lens barrel to move. Since the second part of the lens barrel moves, the lens is driven to move rightward, and the lens moves leftward through the restoring force of the spring, so as to realize the front-end surface focusing on the measured part inserted into the interface.

2. The autofocus mechanism of the optical fiber connector end face detection device according to claim 1, characterized in that, The sleeve includes a first connecting portion, a second connecting portion and a third connecting portion connected in sequence, and an interface is mounted on the third connecting portion.

3. The autofocus mechanism of the optical fiber connector end face detection device according to claim 1, characterized in that, The guide rail is fixed on the sleeve by screws.

4. The autofocus mechanism of the optical fiber connector end face detection device according to claim 1, the autofocus mechanism further includes two photoelectric sensors and a light shielding sheet, the two photoelectric sensors are arranged at intervals in the moving direction of the lens barrel, the light shielding sheet is driven by the driving member to move in the first direction, the light shielding sheet is driven by the elastic reset member to move in the second direction opposite to the first direction, and the movement range of the light shielding sheet is between the two photoelectric sensors.

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