A kind of automatically retractable flexible coupling structure

Abstract

The present application relates to the technical field of optical elements, and specifically discloses an automatically retractable flexible coupling structure, including a coupling body, a cylindrical compression spring and an adjustment rod; the coupling body has a through hole that passes through a first end face and a second end face, and a spiral groove is arranged on the circumferential surface close to the second end face; the cylindrical compression spring is arranged in the through hole; the adjustment rod is inserted into the through hole from the first end face of the coupling body and abuts against the cylindrical compression spring; the threaded pair is inserted into the through hole from the second end face of the coupling body and abuts against the cylindrical compression spring. The above-mentioned flexible coupling structure can effectively prevent the adjustment rod from radially offsetting in the adjustment sleeve without changing the inner diameter of the adjustment sleeve interface and the diameter of the adjustment rod.

Description

Technical Field

[0001] The present application relates to the technical field of optical elements, and in particular to an automatically retractable flexible coupling structure. Background Art

[0002] In optical experiments and optical instruments, it is often necessary to adjust the position of the lens in the optical path. This adjustment is generally performed using a threaded pair. The adjustment rod of the threaded pair extends into an adjustment sleeve that is threadedly connected to the lens frame. The threaded pair is rotated to drive the adjustment sleeve to rotate and retract through the adjustment rod. The adjustment sleeve applies force to the lens clamping mechanism in the lens frame to achieve fine-tuning of the lens position.

[0003] In the process of rotating the threaded pair, in order to prevent the adjustment rod from moving radially in the adjustment sleeve, it is necessary to add a spring structure outside the adjustment rod, which requires increasing the inner diameter of the adjustment sleeve interface or reducing the diameter of the adjustment rod. If the inner diameter of the adjustment sleeve interface is increased, the wall thickness of the entire sleeve will be reduced, and the adjustment rod may be deformed during the rotation of the adjustment rod due to the force of the adjustment rod, increasing the replacement frequency. If the diameter of the adjustment rod is reduced, the adjustment rod is more likely to be deformed during the process of applying force to the adjustment sleeve due to the reaction force of the adjustment sleeve and the torsional force of the threaded pair, which not only affects the adjustment accuracy, but also increases the replacement frequency of the adjustment rod. Summary of the invention

[0004] The present application aims to provide an automatically retractable flexible coupling structure, which effectively prevents the radial displacement of the adjusting rod in the adjusting sleeve without changing the inner diameter of the adjusting sleeve interface and the diameter of the adjusting rod.

[0005] To achieve the above-mentioned purpose, the present application provides an automatically retractable flexible coupling structure, including a coupling body, a cylindrical compression spring and an adjusting rod; the coupling body has a through hole passing through a first end face and a second end face, and a spiral groove is arranged on a circumferential surface close to the second end face; the cylindrical compression spring is arranged in the through hole; the adjusting rod is inserted into the through hole from the first end face of the coupling body and abuts against the cylindrical compression spring; the threaded pair is inserted into the through hole from the second end face of the coupling body and abuts against the cylindrical compression spring.

[0006] Furthermore, the above-mentioned automatically retractable flexible coupling structure also includes a coupling sleeve and a limit plate; a limit hole is arranged on the circumferential surface of the coupling body close to the first end face; a limit groove corresponding to the limit hole is arranged on the adjusting rod; the limit plate passes through the limit hole and is inserted into the limit groove; the coupling sleeve is sleeved on the outside of the coupling body at a position corresponding to the limit plate.

[0007] Furthermore, a first annular boss is provided on the coupling body; the first annular boss is close to the limiting hole.

[0008] Furthermore, a second annular boss is arranged on the coupling body; an end face of the second annular boss coincides with a second end face of the coupling body; and a spiral groove is arranged on the second annular boss.

[0009] Furthermore, a top screw hole is provided on the second annular boss; the top screw passes through the top screw hole and abuts against the thread pair.

[0010] Furthermore, the limiting hole comprises a first hole body whose open end is located at the first end surface of the coupling body and whose closed end is located at the edge of the first annular boss, and a second hole body extending from the first hole body to the inner wall of the coupling body.

[0011] Furthermore, the adjusting rod comprises a round rod segment and a hexagonal rod segment; the limiting groove is arranged on the round rod segment.

[0012] The working process of the above-mentioned automatically retractable flexible coupling structure is as follows:

[0013] The above-mentioned automatically retractable flexible coupling structure includes a coupling body, a cylindrical compression spring and an adjustment rod; the coupling body has a through hole that passes through the first end face and the second end face, and a spiral groove is arranged on the circumferential surface close to the second end face; the cylindrical compression spring is arranged in the through hole; the adjustment rod is inserted into the through hole from the first end face of the coupling body and abuts against the cylindrical compression spring. The adjustment rod is inserted into the adjustment sleeve, the thread pair is inserted into the through hole from the second end face of the coupling body and abuts against the cylindrical compression spring, and the coupling body is fixed on the thread pair by a top screw or a clamp, and the thread pair is rotated to drive the flexible coupling structure to rotate. The cylindrical compression spring arranged in the through hole of the coupling body enables the adjustment rod to have a certain amount of automatic expansion and contraction, prevents excessive tightening in the length direction, and facilitates the installation of the entire assembly and tuning during operation. The spiral groove on the coupling body is similar to a spring structure, so that the coupling body has a certain deflection in the radial and axial directions, which can correct the eccentricity error of the thread pair and the adjustment hole of the mirror frame.

[0014] It can be seen from the above that the above-mentioned automatically retractable flexible coupling structure has the following beneficial effects:

[0015] 1. The cylindrical compression spring arranged in the through hole of the coupling body enables the adjustment rod to have a certain amount of automatic expansion and contraction, preventing it from being too tight in the length direction, and facilitating the installation of the entire assembly and tuning during operation;

[0016] 2. The spiral groove on the coupling body is similar to a spring structure, which makes the coupling body have a certain deflection in the radial and axial directions, which can correct the eccentricity error of the thread pair and the adjustment sleeve. Together with the cylindrical compression spring, the two can achieve the effect of improving the adjustment accuracy of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A front view of an automatically retractable flexible coupling structure provided for one embodiment;

[0019] Figure 2 for Figure 1 A cross-sectional view of the automatically retractable flexible coupling structure in the AA direction;

[0020] Figure 3 for Figure 1 An exploded view of the structure of the automatically retractable flexible coupling is shown;

[0021] Figure 4 A front view of a coupling body in an automatically retractable flexible coupling structure provided in one embodiment;

[0022] Figure 5 for Figure 4 A cross-sectional view of the coupling body in the BB direction is shown;

[0023] Figure 6 A schematic diagram of the installation of an automatically retractable flexible coupling structure provided in one embodiment;

[0024] Figure 7 for Figure 6 Exploded view of the installation diagram shown. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] This embodiment provides an automatically retractable flexible coupling structure 100, comprising a coupling body 101, a cylindrical compression spring 102 and an adjusting rod 103; the coupling body 101 has a through hole 104 that passes through the first end face and the second end face, and a spiral groove 105 is arranged on the circumferential surface close to the second end face; the cylindrical compression spring 102 is arranged in the through hole 104; the adjusting rod 103 is inserted into the through hole 104 from the first end face of the coupling body 101 and abuts against the cylindrical compression spring 102; the thread pair 201 is inserted into the through hole 104 from the second end face of the coupling body 101 and abuts against the cylindrical compression spring 102. Among them, the spiral groove 105 may penetrate the coupling body 101, or may not penetrate the coupling body 101.

[0027] Insert the adjusting rod 103 into the adjusting sleeve 203 of the mirror frame 202, insert the thread pair 201 into the through hole 104 from the second end face of the coupling body 101, abut against the cylindrical compression spring 102, and fix the coupling body 101 on the thread pair 201 through the top screw 204 or the clamp, rotate the thread pair 201 to drive the flexible coupling structure 100 to rotate, and the cylindrical compression spring 102 arranged in the through hole 104 of the coupling body 101 enables the adjusting rod 103 to have a certain amount of automatic expansion and contraction, prevents it from being too tight in the length direction, and facilitates the installation of the entire assembly and tuning during operation. The spiral groove 105 on the coupling body 101 is similar to a spring structure, so that the coupling body 101 has a certain deflection in the radial and axial directions, which can correct the eccentricity error of the thread pair 201 and the adjusting sleeve 203.

[0028] Furthermore, the above-mentioned automatically retractable flexible coupling structure also includes a coupling sleeve 106 and a limiting plate 107; a limiting hole 108 is provided on the circumferential surface of the coupling body 101 close to the first end surface; a limiting groove 109 corresponding to the limiting hole 108 is provided on the adjustment rod 103; the limiting plate 107 passes through the limiting hole 108 and is inserted into the limiting groove 109; the coupling sleeve 106 is sleeved on the position corresponding to the limiting plate 107 outside the coupling body 101. The setting of the limiting plate 107 can effectively prevent the relative displacement of the coupling body 101 and the adjusting rod 103 from occurring in the circumferential direction when the coupling body 101 drives the adjusting rod 103 to rotate, thereby improving the adjustment accuracy of the lens 205, and the setting of the coupling sleeve 106 effectively prevents the limiting plate 107 from falling off.

[0029] Furthermore, a first annular boss 110 is disposed on the coupling body 101; the first annular boss 110 is close to the limiting hole 108. The provision of the first annular boss 110 facilitates the installation of the coupling sleeve 106.

[0030] Furthermore, the coupling body 101 is provided with a second annular boss 111; the end face of the second annular boss 111 coincides with the second end face of the coupling body 101; and the spiral groove 105 is provided on the second annular boss 111. Providing the spiral groove 105 on the coupling body 101 will have an adverse effect on the structural strength of the coupling body 101 itself, and the purpose of providing the second annular boss 111 is to thicken the wall thickness of the coupling body 101, minimize the adverse effect, ensure the structural strength of the coupling body 101, and prevent the coupling body 101 from being easily deformed when the thread pair 201 applies a force to the coupling body 101.

[0031] Furthermore, in order to facilitate the installation and disassembly of the flexible coupling structure 100 and the threaded pair 201, the flexible coupling structure 100 provided in this embodiment is fixed to the threaded pair 201 by a top screw 203; a top screw hole 112 is provided on the second annular boss; and the top screw 204 passes through the top screw hole 112 and rests on the threaded pair 201.

[0032] Furthermore, for ease of processing, the limiting hole 108 includes a first hole body with an open end located at the first end surface of the coupling body 101 and a closed end located at the edge of the first annular boss 110 , and a second hole body extending from the first hole body to the inner wall of the coupling body 101 .

[0033] Furthermore, the adjusting rod 103 includes a round rod section and a hexagonal rod section; the limiting groove 109 is arranged on the round rod section. The hexagonal rod section is adapted to the hexagonal interface of the adjusting sleeve 203, so that the two are not easily displaced relative to each other during rotation, thereby improving the adjustment accuracy of the lens 205.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatically retractable flexible coupling structure, characterized in that: It includes a coupling body, a cylindrical compression spring and an adjustment rod; The coupling body has a through hole penetrating the first end face and the second end face, a spiral groove is arranged on the circumferential surface close to the second end face, and the coupling body is provided with a first annular boss and a second annular boss; the first annular boss is close to the limiting hole, the end face of the second annular boss coincides with the second end face of the coupling body, the spiral groove is arranged on the second annular boss, the second annular boss is used to thicken the wall thickness of the coupling body, and the wall thickness of the second annular boss is greater than the wall thickness of the first annular boss; The cylindrical compression spring is arranged in the through hole; The adjusting rod is inserted into the through hole from the first end surface of the coupling body and abuts against the cylindrical compression spring; The thread pair is inserted into the through hole from the second end surface of the coupling body and abuts against the cylindrical compression spring.

2. The automatically retractable flexible coupling structure according to claim 1, characterized in that: Also includes a coupling sleeve and a stopper; A limiting hole is provided on the circumferential surface of the coupling body close to the first end surface; The adjusting rod is provided with a limiting groove corresponding to the limiting hole; The limiting piece passes through the limiting hole and is inserted into the limiting groove; The coupling sleeve is sleeved on a position outside the coupling body corresponding to the limiting piece.

3. The automatically retractable flexible coupling structure according to claim 1, characterized in that: The second annular boss is provided with a top screw hole; The top screw passes through the top screw hole and rests on the thread pair.

4. The automatically retractable flexible coupling structure according to claim 1, characterized in that: The limiting hole comprises a first hole body whose open end is located at the first end surface of the coupling body and whose closed end is located at the edge of the first annular boss, and a second hole body extending from the first hole body to the inner wall of the coupling body.

5. The automatically retractable flexible coupling structure according to claim 2, characterized in that: The adjusting rod comprises a round rod segment and a hexagonal rod segment; The limiting groove is arranged on the round rod segment.

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