Torquer in holographic storage system and focusing suspension wire of torquer

Abstract

The invention relates to a torquer in a holographic storage system and a focusing suspension wire of the torquer, and the focusing suspension wire comprises a first line segment, a first bending part, a second line segment, a second bending part and a third line segment which are sequentially arranged. The first bending part comprises a first bending line segment, a second bending line segment and a third bending line segment. The second bending part comprises a fourth bending line segment, a fifth bending line segment and a sixth bending line segment; the included angle between the first bending line segment and the second line segment, the included angle between the first bending line segment and the second bending line segment, the included angle between the second bending line segment and the third bending line segment, the included angle between the third bending line segment and the first line segment, the included angle between the fourth bending line segment and the second line segment, and the included angle between the fourth bending line segment and the fifth bending line segment; the included angle between the fifth bending line segment and the sixth bending line segment and the included angle between the sixth bending line segment and the third line segment are both larger than 90 degrees. The rigidity of the second line segment in the tracking direction can be effectively improved, and the function of synchronous movement of the objective lens and the reflector in the tracking direction is achieved.

Description

Technical Field

[0001] This application relates to the field of optical technology, specifically to a torque device and its focusing suspension wire in a holographic storage system. Background Technology

[0002] In holographic storage, data is stored in the form of holograms in a medium (such as photopolymer organic materials). The reading and writing process requires high-precision optical head control, such as controlling the micro-displacement of the objective lens or mirror to ensure that the laser beam is accurately aligned with a specific position in the storage medium, and to compensate for minor deviations caused by medium jitter or thermal drift, maintaining stable alignment between the beam and the hologram. The torque device is the core component in the holographic storage system used to control the precise positioning of the optical head, and its performance directly affects the tracking speed, positioning accuracy, and data reading and writing reliability that the storage system can achieve.

[0003] like Figure 1 As shown, the torque in the existing holographic storage system uses a four-circular-arc symmetrically distributed focusing suspension wire. Due to the characteristics of holographic storage, the torque must ensure that the mirror and the objective lens move synchronously in the tracking direction, but the existing four-circular-arc symmetrically distributed focusing suspension wire cannot meet this requirement well. Summary of the Invention

[0004] In view of the above problems, this application provides a torque generator and its focusing suspension wire in a holographic storage system, which solves the problem that the torque generator in the existing holographic storage system, which uses a focusing suspension wire with four circular arcs symmetrically distributed, cannot guarantee the synchronous movement of the reflecting mirror and the objective lens in the tracking direction.

[0005] To achieve the above objectives, the inventors provide a focusing suspension wire, which is used as a torque device in a holographic storage system, comprising a first line segment, a first bend, a second line segment, a second bend, and a third line segment arranged sequentially:

[0006] The first line segment and the third line segment are arranged on the same straight line;

[0007] The first bend and the second bend are symmetrically arranged at both ends of the second line segment;

[0008] The first bending portion includes a first bending segment, a second bending segment, and a third bending segment connected in sequence. The first bending segment is connected to the second segment, and the third bending segment is connected to the first segment. The angles between the first bending segment and the second segment, between the first bending segment and the second bending segment, between the second bending segment and the third bending segment, and between the third bending segment and the first segment are all greater than 90 degrees.

[0009] The second bending part comprises a fourth bending line segment, a fifth bending line segment and a sixth bending line segment connected in sequence, the fourth bending line segment is connected to the second line segment, the sixth bending line segment is connected to the third line segment, and the included angle between the fourth bending line segment and the second line segment, the included angle between the fourth bending line segment and the fifth bending line segment, the included angle between the fifth bending line segment and the sixth bending line segment and the included angle between the sixth bending line segment and the third line segment are all greater than 90 degrees.

[0010] In some embodiments, the included angle between the first bending line segment and the second bending line segment, the included angle between the second bending line segment and the third bending line segment, the included angle between the fourth bending line segment and the fifth bending line segment and the included angle between the fifth bending line segment and the sixth bending line segment are all rounded angles.

[0011] In some embodiments, the length of the first bending line segment is equal to the length of the third bending line segment, and the length of the fourth bending line segment is equal to the length of the sixth bending line segment.

[0012] In some embodiments, the length of the first bending line segment and the length of the third bending line segment are both half of the length of the second bending line segment, and the length of the fourth bending line segment and the length of the sixth bending line segment are both half of the length of the fifth bending line segment.

[0013] In some embodiments, the length of the second line segment is shorter than the length of the first line segment and the length of the third line segment.

[0014] Another technical solution is also provided, which is a torque device in a holographic storage system, the torque device comprises a focusing suspension wire, and the focusing suspension wire comprises a first line segment, a first bending part, a second line segment, a second bending part and a third line segment arranged in sequence:

[0015] The first line segment and the third line segment are arranged on the same straight line;

[0016] The first bending part and the second bending part are symmetrically arranged at two ends of the second line segment;

[0017] The first bending part comprises a first bending line segment, a second bending line segment and a third bending line segment connected in sequence, the first bending line segment is connected to the second line segment, the third bending line segment is connected to the first line segment, and the included angle between the first bending line segment and the second line segment, the included angle between the first bending line segment and the second bending line segment, the included angle between the second bending line segment and the third bending line segment and the included angle between the third bending line segment and the first line segment are all greater than 90 degrees;

[0018] The second bending part comprises a fourth bending line segment, a fifth bending line segment and a sixth bending line segment connected in sequence, the fourth bending line segment is connected to the second line segment, the sixth bending line segment is connected to the third line segment, and the included angles between the fourth bending line segment and the second line segment, the fourth bending line segment and the fifth bending line segment, the fifth bending line segment and the sixth bending line segment, and the sixth bending line segment and the third line segment are all greater than 90 degrees. In some embodiments, the included angles between the first bending line segment and the second bending line segment, the second bending line segment and the third bending line segment, the fourth bending line segment and the fifth bending line segment, and the fifth bending line segment and the sixth bending line segment are all rounded angles.

[0019] In some embodiments, the lengths of the first bending line segment and the third bending line segment are equal, and the lengths of the fourth bending line segment and the sixth bending line segment are equal.

[0020] In some embodiments, the lengths of the first bending line segment and the third bending line segment are each half of the length of the second bending line segment, and the lengths of the fourth bending line segment and the sixth bending line segment are each half of the length of the fifth bending line segment.

[0021] In some embodiments, the length of the second line segment is shorter than the lengths of the first line segment and the third line segment.

[0022] Unlike the prior art, the above technical solution sets the first line segment and the third line segment of the focusing suspension wire on the same straight line, symmetrically sets the first bending part and the second bending part at both ends of the second line segment, sets the included angles formed by the first bending part and the first line segment and the second line segment to be greater than 90 degrees, and sets the included angles formed by the second bending part and the second line segment and the third line segment to be greater than 90 degrees. The first bending part and the second bending part each comprise three bending line segments, and the included angles between the three bending line segments are also all greater than 90 degrees, thereby obtaining a four-triangle symmetrically distributed suspension wire. The included angles greater than 90 degrees can effectively improve the rigidity of the second line segment in the tracking direction while not changing the rigidity in the focusing direction, thereby realizing the function of synchronous movement of the objective lens and the reflecting mirror in the tracking direction.

[0023] The above summary of the invention is only a summary of the technical solutions of the present application. In order for those skilled in the art to more clearly understand the technical solutions of the present application, and to be able to implement the content described in the specification and the drawings, and in order for the above and other purposes, features and advantages of the present application to be more easily understood, the following describes the specific embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are only used to illustrate the principles, implementation manners, applications, characteristics and effects of the specific embodiments of the present application and cannot be considered as limitation to the present application.

[0025] In the drawings:

[0026] Figure 1 A structure of the focusing suspension wire with four circular arcs symmetrically distributed is described as background art;

[0027] Figure 2 A structure of the focusing suspension wire is described as specific embodiment;

[0028] Figure 3 A deformation of the focusing suspension wire with four circular arcs symmetrically distributed when a focusing direction force is applied to the middle region is described as specific embodiment;

[0029] Figure 4 A deformation of the focusing suspension wire with four triangular arcs symmetrically distributed when a focusing direction force is applied to the middle region is described as specific embodiment;

[0030] Figure 5 A deformation of the focusing suspension wire with four circular arcs symmetrically distributed when a tracking direction force is applied to the middle region is described as specific embodiment;

[0031] Figure 6 A deformation of the focusing suspension wire with four triangular arcs symmetrically distributed when a tracking direction force is applied to the middle region is described as specific embodiment;

[0032] Figure 7 A structure of the torque device of the holographic storage system is described as specific embodiment.

[0033] The reference signs involved in the above drawings are explained as follows:

[0034] 100, focusing suspension wire,

[0035] 110, first line segment, 120, second line segment, 130, third line segment, 140, first bending part, 141, first bending line segment, 142, second bending line segment, 143, third bending line segment, 150, second bending part, 151, fourth bending line segment, 152, fifth bending line segment, 153, sixth bending line segment;

[0036] 211, objective lens, 212, focusing coil, 213, objective lens torque device, 214, yoke, 215, magnet, 216, tracking coil, 217, integral torque device, 218, tracking suspension wire, 219, reflecting mirror, 220, metal frame. Specific embodiment

[0037] To explain possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects of the present application in detail, the following embodiments are described in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0039] Unless otherwise defined, the meaning of the technical terms used herein is the same as that generally understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0040] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a "or" logical relationship.

[0041] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0042] Without more limitations, in the present application, the phrases "include", "contain", "have" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0043] As the same as the understanding in the "Examination Guidelines", in the present application, "greater than", "less than", "exceed" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is two or more (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly and specifically limited.

[0044] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set" and the like should be broadly understood. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] Please refer to Figure 2 The focus suspension wire of the embodiment is applied to a torque device of a holographic storage system, and comprises a first line segment 110, a first bending part 140, a second line segment 120, a second bending part 150 and a third line segment 130 arranged in sequence.

[0047] The first line segment 110 and the third line segment 130 are arranged on the same straight line;

[0048] The first bending part 140 and the second bending part 150 are symmetrically arranged at both ends of the second line segment 120;

[0049] The first bending part 140 comprises first bending line segment 141, second bending line segment 142 and third bending line segment 143 connected in sequence, the first bending line segment 141 is connected to the second line segment 120, the third bending line segment 143 is connected to the first line segment 110, the included angle between the first bending line segment 141 and the second line segment 120, the included angle between the first bending line segment 141 and the second bending line segment 142, the included angle between the second bending line segment 142 and the third bending line segment 143 and the included angle between the third bending line segment 143 and the first line segment 110 are all greater than 90 degrees.

[0050] The second bending part 150 comprises fourth bending line segment 151, fifth bending line segment 152 and sixth bending line segment 153 connected in sequence, the fourth bending line segment 151 is connected to the second line segment 120, the sixth bending line segment 153 is connected to the third line segment 130, the included angle between the fourth bending line segment 151 and the second line segment 120, the included angle between the fourth bending line segment 151 and the fifth bending line segment 152, the included angle between the fifth bending line segment 152 and the sixth bending line segment 153 and the included angle between the sixth bending line segment 153 and the third line segment 130 are all greater than 90 degrees.

[0051] By setting the first line segment 110 and the third line segment 130 of the focusing suspension wire on the same straight line, symmetrically arranging the first bending part 140 and the second bending part 150 at both ends of the second line segment 120, setting the included angle formed by connecting the first bending part 140 with the first line segment 110 and the second line segment 120 to be greater than 90 degrees, setting the included angle formed by connecting the second bending part 150 with the second line segment 120 and the third line segment 130 to be greater than 90 degrees, the first bending part 140 and the second bending part 150 are both composed of three bending line segments, and the included angles between the three bending line segments are all greater than 90 degrees, thereby obtaining a four-triangle symmetric distribution type suspension wire, and the included angles greater than 90 degrees can effectively improve the rigidity of the second line segment 120 in the tracking direction, while not changing the rigidity in the focusing direction, thereby realizing the function of synchronous movement of the objective lens and the reflecting mirror in the tracking direction.

[0052] In some embodiments, the included angle between the first bending line segment 141 and the second bending line segment 142, the included angle between the second bending line segment 142 and the third bending line segment 143, the included angle between the fourth bending line segment 151 and the fifth bending line segment 152 and the included angle between the fifth bending line segment 152 and the sixth bending line segment 153 are all rounded angles.

[0053] By setting the angles between the first bending line segment 141 and the second bending line segment 142, the angle between the second bending line segment 142 and the third bending line segment 143, the angle between the fourth bending line segment 151 and the fifth bending line segment 152, and the angle between the fifth bending line segment 152 and the sixth bending line segment 153 as rounded angles, when the force in the tracking direction acts on the angles between the first bending line segment 141 and the second bending line segment 142, the angle between the second bending line segment 142 and the third bending line segment 143, the angle between the fourth bending line segment 151 and the fifth bending line segment 152, and the angle between the fifth bending line segment 152 and the sixth bending line segment 153, setting the angles as rounded angles can effectively disperse the force in the tracking direction on these angles, further improving the rigidity of the focusing suspension wire.

[0054] In some embodiments, the lengths of the first bending line segment 141 and the third bending line segment 143 are equal, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 are equal. In other embodiments, the first bending line segment 141 can also be set to be shorter than the third bending line segment 143, the fourth bending line segment 151 can also be set to be shorter than the sixth bending line segment 153, or the first bending line segment 141 can also be set to be longer than the third bending line segment 143, and the fourth bending line segment 151 can also be set to be longer than the sixth bending line segment 153.

[0055] In some embodiments, the lengths of the first bending line segment 141 and the third bending line segment 143 are each half of the length of the second bending line segment 142, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 are each half of the length of the fifth bending line segment 152. By setting the lengths of the first bending line segment 141 and the third bending line segment 143 to be equal, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 to be equal, and the lengths of the first bending line segment 141 and the third bending line segment 143 to be each half of the length of the second bending line segment 142, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 to be each half of the length of the fifth bending line segment 152, the force in the tracking direction can be evenly distributed on these bending line segments, further improving the rigidity of the focusing suspension wire.

[0056] In some embodiments, the length of the second line segment 120 is shorter than the lengths of the first line segment 110 and the third line segment 130. By setting the length of the second line segment 120 to be shorter than the lengths of the first line segment 110 and the second line segment 120, the rigidity of the second line segment 120 can be effectively improved while keeping the length of the entire focusing suspension wire unchanged.

[0057] In some embodiments, as shown in FIG. 1, the focusing suspension wire 100 includes a first line segment 110, a second line segment 120, a third line segment 130, a fourth line segment 140, a fifth line segment 150, and a sixth line segment 160. Figures 3-4As shown in the figure, finite element analysis reveals that when the same magnitude and focusing direction force is applied to the middle region of both the existing four-circle symmetrically distributed focusing wire and the improved four-triangular symmetrically distributed focusing wire, the deformation of the middle region of the two types of focusing wires is not significantly different. This indicates that the objective lens's motion in the focusing direction is not affected by the change in the focusing wire. However, as... Figures 5-6 As shown, when the same magnitude and tracking direction force are applied to the middle region of the two suspension wires, the deformation of the middle region of the two suspension wires differs by about 3 times. According to the stiffness formula: stiffness in a certain direction = (force in a certain direction / deformation in that direction), it means that the stiffness of the objective lens in the tracking direction is improved due to the change in the suspension wire structure, thereby achieving a better synchronization effect between the objective lens and the mirror.

[0058] By designing the focusing suspension wire required for the torque device in the holographic storage system, a better synchronous movement effect between the objective lens and the reflecting mirror 219 was achieved without significantly changing the objective lens movement or increasing the material used for the focusing suspension wire.

[0059] In another embodiment, such as Figure 7As shown, the moment device in the holographic storage system is composed of an objective lens 211, a focusing coil 212, an objective lens moment device 213, a focusing suspension wire 100, a yoke 214, a magnet 215, a tracking coil 216, an overall moment device 217, a tracking suspension wire 218, a mirror 219 and a metal frame 220, wherein the objective lens 211, the focusing coil 212, the objective lens moment device 213, the focusing suspension wire 100, the yoke 214, the magnet 215, the tracking coil 216, the overall moment device 217, the tracking suspension wire 218 and the mirror 219 are arranged in the metal frame 220, the objective lens 211 is arranged on the objective lens moment device 213, and the focusing coil 212 is arranged between the objective lens moment device 213 and the overall moment device 217; the focusing suspension wire 100 is four, and two of them are arranged on two sides of the objective lens 211, and the two ends of the focusing suspension wire 100 are arranged on the overall moment device 217 through rivets; the mirror 219 is arranged on the overall moment device 217, and the mirror 219 can rotate relative to the overall moment device 217, and the mirror 219 is used for changing the direction of the light path so that the light can accurately pass through the objective lens 211; the tracking coil 216 is four, and two of them are arranged on two sides of the overall moment device 217; the tracking suspension wire 218 is four, and two of them are arranged on the other two sides of the overall moment device 217, wherein the focusing suspension wire 100 and the tracking suspension wire 218 are perpendicular to each other; the magnet 215 is two, and is arranged at the two ends of the focusing coil 212 and between the focusing coil 212 and the tracking coil 216; the yoke 214 is two, and is sleeved on the focusing coil 212, the magnet 215 and the tracking coil 216 at both ends of the moment device, that is, the focusing coil 212, the magnet 215 and the tracking coil 216 at both ends are arranged in the corresponding yoke 214; the adjustment of the objective lens 211 is realized through the focusing coil 212 and the focusing suspension wire 100, and the adjustment of the mirror 219 and the objective lens 211 is realized through the tracking coil 216 and the tracking suspension wire 218.

[0060] The focusing suspension wire 100 comprises a first segment 110, a first bending part 140, a second segment 120, a second bending part 150 and a third segment 130 arranged in sequence.

[0061] The first segment 110 and the third segment 130 are arranged on the same straight line.

[0062] The first bending part 140 and the second bending part 150 are symmetrically arranged at the two ends of the second segment 120.

[0063] The first bending part 140 comprises first bending line segment 141, second bending line segment 142 and third bending line segment 143 connected in sequence, the first bending line segment 141 is connected to the second line segment 120, the third bending line segment 143 is connected to the first line segment 110, the included angle between the first bending line segment 141 and the second line segment 120, the included angle between the first bending line segment 141 and the second bending line segment 142, the included angle between the second bending line segment 142 and the third bending line segment 143 and the included angle between the third bending line segment 143 and the first line segment 110 are all greater than 90 degrees.

[0064] The second bending part 150 comprises fourth bending line segment 151, fifth bending line segment 152 and sixth bending line segment 153 connected in sequence, the fourth bending line segment 151 is connected to the second line segment 120, the sixth bending line segment 153 is connected to the third line segment 130, the included angle between the fourth bending line segment 151 and the second line segment 120, the included angle between the fourth bending line segment 151 and the fifth bending line segment 152, the included angle between the fifth bending line segment 152 and the sixth bending line segment 153 and the included angle between the sixth bending line segment 153 and the third line segment 130 are all greater than 90 degrees.

[0065] By setting the first line segment 110 and the third line segment 130 of the focusing suspension wire on the same straight line, symmetrically setting the first bending part 140 and the second bending part 150 at both ends of the second line segment 120, setting the included angle formed by connecting the first bending part 140 with the first line segment 110 and the second line segment 120 to be greater than 90 degrees, setting the included angle formed by connecting the second bending part 150 with the second line segment 120 and the third line segment 130 to be greater than 90 degrees, the first bending part 140 and the second bending part 150 are both composed of three bending line segments, and the included angles between the three bending line segments are all greater than 90 degrees, thereby obtaining a four-triangle symmetric distribution type suspension wire, and the included angles greater than 90 degrees can effectively improve the rigidity of the second line segment 120 in the tracking direction, while not changing the rigidity in the focusing direction, thereby realizing the function of synchronous movement of the objective lens and the reflecting mirror 219 in the tracking direction.

[0066] In some embodiments, the included angle between the first bending line segment 141 and the second bending line segment 142, the included angle between the second bending line segment 142 and the third bending line segment 143, the included angle between the fourth bending line segment 151 and the fifth bending line segment 152 and the included angle between the fifth bending line segment 152 and the sixth bending line segment 153 are all rounded angles.

[0067] By setting the included angles between the first bending line segment 141 and the second bending line segment 142, the second bending line segment 142 and the third bending line segment 143, the fourth bending line segment 151 and the fifth bending line segment 152, and the fifth bending line segment 152 and the sixth bending line segment 153 as rounded angles, when the force in the tracking direction acts on the included angles between the first bending line segment 141 and the second bending line segment 142, the second bending line segment 142 and the third bending line segment 143, the fourth bending line segment 151 and the fifth bending line segment 152, and the fifth bending line segment 152 and the sixth bending line segment 153, setting the included angles as rounded angles can effectively disperse the force in the tracking direction, further improving the rigidity of the focusing suspension wire.

[0068] In some embodiments, the lengths of the first bending line segment 141 and the third bending line segment 143 are equal, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 are equal. In other embodiments, the first bending line segment 141 can also be set to be shorter than the third bending line segment 143, the fourth bending line segment 151 can also be set to be shorter than the sixth bending line segment 153, or the first bending line segment 141 can also be set to be longer than the third bending line segment 143, and the fourth bending line segment 151 can also be set to be longer than the sixth bending line segment 153.

[0069] In some embodiments, the lengths of the first bending line segment 141 and the third bending line segment 143 are each half of the length of the second bending line segment 142, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 are each half of the length of the fifth bending line segment 152. By setting the lengths of the first bending line segment 141 and the third bending line segment 143 to be equal, the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 to be equal, and the lengths of the first bending line segment 141 and the third bending line segment 143 to be each half of the length of the second bending line segment 142, and the lengths of the fourth bending line segment 151 and the sixth bending line segment 153 to be each half of the length of the fifth bending line segment 152, the force in the tracking direction can be evenly distributed on the bending line segments, further improving the rigidity of the focusing suspension wire.

[0070] In some embodiments, the length of the second line segment 120 is shorter than the lengths of the first line segment 110 and the third line segment 130. By setting the length of the second line segment 120 to be shorter than the lengths of the first line segment 110 and the second line segment 120, the rigidity of the second line segment 120 can be effectively improved while keeping the length of the entire focusing suspension wire unchanged.

[0071] Finally, it should be noted that the above embodiments have been described in the specification and drawings of the present application, but this does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings of the present application, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A focusing suspension wire applied to a torque motor of a holographic storage system, characterized by, The first linear segment, the first bending part, the second linear segment, the second bending part and the third linear segment are sequentially arranged. The first linear segment and the third linear segment are arranged on the same straight line. The first bending part and the second bending part are symmetrically arranged at two ends of the second linear segment. The first bending part comprises a first bending linear segment, a second bending linear segment and a third bending linear segment which are sequentially connected, the first bending linear segment is connected to the second linear segment, the third bending linear segment is connected to the first linear segment, and the included angle between the first bending linear segment and the second linear segment, the included angle between the first bending linear segment and the second bending linear segment, the included angle between the second bending linear segment and the third bending linear segment and the included angle between the third bending linear segment and the first linear segment are all greater than 90 degrees. The second bending part comprises a fourth bending linear segment, a fifth bending linear segment and a sixth bending linear segment which are sequentially connected, the fourth bending linear segment is connected to the second linear segment, the sixth bending linear segment is connected to the third linear segment, and the included angle between the fourth bending linear segment and the second linear segment, the included angle between the fourth bending linear segment and the fifth bending linear segment, the included angle between the fifth bending linear segment and the sixth bending linear segment and the included angle between the sixth bending linear segment and the third linear segment are all greater than 90 degrees.

2. The focusing cantilever according to claim 1, characterized in that The included angle between the first bending linear segment and the second bending linear segment, the included angle between the second bending linear segment and the third bending linear segment, the included angle between the fourth bending linear segment and the fifth bending linear segment and the included angle between the fifth bending linear segment and the sixth bending linear segment are all rounded angles.

3. The focusing cantilever according to claim 1, wherein The length of the first bending linear segment is equal to the length of the third bending linear segment, and the length of the fourth bending linear segment is equal to the length of the sixth bending linear segment.

4. The focusing cantilever according to claim 3, wherein The length of the first bending linear segment and the length of the third bending linear segment are both half of the length of the second bending linear segment, and the length of the fourth bending linear segment and the length of the sixth bending linear segment are both half of the length of the fifth bending linear segment.

5. The focusing cantilever according to claim 1, wherein The length of the second linear segment is shorter than the length of the first linear segment and the length of the third linear segment.

6. A torque motor in a holographic storage system, the torque motor comprising a focusing suspension, characterized by The first linear segment, the first bending part, the second linear segment, the second bending part and the third linear segment are sequentially arranged. The first linear segment and the third linear segment are arranged on the same straight line. The first bending part and the second bending part are symmetrically arranged at two ends of the second linear segment. The first bending part comprises a first bending linear segment, a second bending linear segment and a third bending linear segment which are sequentially connected, the first bending linear segment is connected to the second linear segment, the third bending linear segment is connected to the first linear segment, and the included angle between the first bending linear segment and the second linear segment, the included angle between the first bending linear segment and the second bending linear segment, the included angle between the second bending linear segment and the third bending linear segment and the included angle between the third bending linear segment and the first linear segment are all greater than 90 degrees. The second bending part comprises a fourth bending linear segment, a fifth bending linear segment and a sixth bending linear segment which are sequentially connected, the fourth bending linear segment is connected to the second linear segment, the sixth bending linear segment is connected to the third linear segment, and the included angle between the fourth bending linear segment and the second linear segment, the included angle between the fourth bending linear segment and the fifth bending linear segment, the included angle between the fifth bending linear segment and the sixth bending linear segment and the included angle between the sixth bending linear segment and the third linear segment are all greater than 90 degrees.

7. A torque motor in a holographic storage system according to claim 6, characterized in that The included angle between the first bending line segment and the second bending line segment, the included angle between the second bending line segment and the third bending line segment, the included angle between the fourth bending line segment and the fifth bending line segment, and the included angle between the fifth bending line segment and the sixth bending line segment are all rounded angles.

8. A torque motor in a holographic storage system according to claim 6, wherein, The length of the first bending line segment is equal to the length of the third bending line segment, and the length of the fourth bending line segment is equal to the length of the sixth bending line segment.

9. A torque motor in a holographic storage system according to claim 8, characterized in that, The length of the first bending line segment and the length of the third bending line segment are each half the length of the second bending line segment, and the length of the fourth bending line segment and the length of the sixth bending line segment are each half the length of the fifth bending line segment.

10. The torque motor in a holographic storage system of claim 6, wherein, The length of the second line segment is shorter than the length of the first line segment and the length of the third line segment.

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