Plunger-type rotating shaft and spectacle fixing jig

Abstract

The present invention discloses a plunger-type rotating shaft and a spectacle fixing jig, belonging to the technical field of rotating connectors. The plunger-type rotating shaft includes a plunger tube, a plunger head, a first magnetic member and a second magnetic member. The plunger head has a first end restricted in the plunger tube and a second end that can extend out of the plunger tube. The first magnetic member is disposed in the plunger tube, and the second magnetic member is disposed on the plunger head. The plunger head can move relative to the plunger tube under the interaction of the first magnetic member and the second magnetic member so that the second end of the plunger head extends out of the first end of the plunger tube. This solution can solve the problem of difficult installation or disassembly of the connecting shaft in the existing rotating structure.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating connectors, and particularly to a plunger-type rotating shaft and a spectacle fixing jig. Background Art

[0002] Rotating connection structures are widely used in various aspects of daily life and production. Traditional rotating connection structures mainly achieve the rotational connection of two relatively rotating components through the rotational fit of a cylindrical shaft with at least one of the two relatively rotating components. Traditional cylindrical shafts, such as bolts, screws, pins, rivets, etc., pass through one of the rotating components at one end and are rotationally fitted with this rotating component, and the other end is fixed to the other rotating component through methods such as threading, nuts, or interference fits, thereby realizing the rotatable connection of the two rotating components. Methods such as threaded assembly and interference fit with too tight a fit will increase the resistance to relative rotation of the two rotating components, and too loose a fit will result in a reduction in the assembly accuracy of the two rotating components. The interference fit assembly of pins or rivets requires the assistance of jigs and is not easily disassembled. Summary of the Invention

[0003] The present invention discloses a plunger-type rotating shaft.

[0004] The plunger-type rotating shaft disclosed in the embodiments of the present invention includes: a plunger tube, a plunger head, a first magnetic member, and a second magnetic member; the plunger head has a first end restricted within the plunger tube and a second end that can extend out of the plunger tube, the first magnetic member is disposed in the plunger tube, the second magnetic member is disposed on the plunger head, and the plunger head is movable relative to the plunger tube under the interaction of the first magnetic member and the second magnetic member so that the second end of the plunger head extends out of the first end of the plunger tube.

[0005] The spectacle fixing jig disclosed in the embodiments of the present invention includes the above-mentioned plunger-type rotating shaft, and further includes a support seat and a cover plate. The support seat and the cover plate are rotationally connected through the plunger-type rotating shaft.

[0006] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0007] In the plunger-type rotating shaft disclosed in the embodiments of the present invention, the plunger head is movable relative to the plunger tube, and the plunger head is movable relative to the plunger tube under the action of the first magnetic member and the second magnetic member, so that one end of the plunger head can extend out of the first end of the plunger tube. If it is necessary to assemble the plunger-type rotating shaft with two rotating components, the plunger tube can be first installed in one of the rotating components, and then by pressing the plunger head, the plunger head is at least partially retracted into the plunger tube, and then the other rotating component is installed. Specifically, when the plunger head or the plunger tube is aligned with the mounting hole of the other rotating component, one end of the plunger head extends out of the first end of the plunger tube under the action of the first magnetic member and the second magnetic member and extends into the mounting hole of the other rotating component, thereby realizing the installation of the two rotating components. When disassembling, a force can be applied again to the plunger head or the plunger tube to overcome the magnetic force between the first magnetic member and the second magnetic member, so that the plunger head can be at least partially retracted into the plunger tube, and the part of the plunger head located in the mounting hole can be taken out to realize the disassembly of the plunger-type rotating shaft. The plunger-type rotating shaft disclosed in the embodiments of the present invention is convenient for assembly and disassembly, can shorten the assembly and disassembly time of the two rotating components, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the drawings:

[0009] Figure 1 is a sectional view of the plunger-type rotating shaft disclosed in the embodiments of the present invention;

[0010] Figure 2 is an exploded view of the plunger-type rotating shaft disclosed in the embodiments of the present invention;

[0011] Figure 3 is a schematic diagram of the glasses fixing jig disclosed in the embodiments of the present invention;

[0012] Figure 4 is an installation schematic diagram of the plunger-type rotating shaft disclosed in the embodiments of the present invention;

[0013] Figure 5 is an assembly drawing of the cover plate and the plunger-type rotating shaft disclosed in the embodiments of the present invention;

[0014] Figure 6 is an installation schematic diagram of the cover plate disclosed in the embodiments of the present invention;

[0015] Figure 7 is a schematic diagram of the support seat disclosed in the embodiments of the present invention;

[0016] Figure 8 is a schematic diagram of the cover plate disclosed in the embodiments of the present invention;

[0017] Figure 9 Schematic diagram of the first protrusion and the second protrusion in the first state disclosed in the embodiments of the present invention;

[0018] Figure 10 Schematic diagram of the first protrusion and the second protrusion in the second state disclosed in the embodiments of the present invention;

[0019] Figure 11 Schematic diagram of the first protrusion and the second protrusion in the second state disclosed in the embodiments of the present invention;

[0020] Figure 12 Schematic diagram of the cover plate of the glasses fixing jig in the open state disclosed in the embodiments of the present invention;

[0021] Figure 13 Schematic diagram of the cover plate of the glasses fixing jig in the closed state disclosed in the embodiments of the present invention;

[0022] Figure 14 Bottom view of the glasses fixing jig disclosed in the embodiments of the present invention;

[0023] Figure 15 Top view of the glasses fixing jig disclosed in the embodiments of the present invention;

[0024] Figure 16 Cross-sectional view of another plunger type rotating shaft disclosed in the embodiments of the present invention;

[0025] Figure 17 Cross-sectional view of yet another plunger type rotating shaft disclosed in the embodiments of the present invention;

[0026] Figure 18 Schematic diagram of the rotational connection between the cover plate and the support base disclosed in the embodiments of the present invention;

[0027] Figure 19 Schematic diagram of the second articulated end face disclosed in the embodiments of the present invention;

[0028] Figure 20 Schematic diagram of the first articulated end face disclosed in the embodiments of the present invention;

[0029] Figure 21 Schematic diagram of the rotational connection between the cover plate and the support base disclosed in the embodiments of the present invention.

[0030] In the figure: 100 - plunger type rotating shaft; 110 - plunger tube; 111 - first limit boss; 112 - plunger base; 112a - first body; 112b - second body; 120 - plunger press head; 121 - first plunger part; 122 - second plunger part; 130 - first magnetic part; 140 - second magnetic part; 150 - exhaust hole; 151 - first exhaust hole; 152 - second exhaust hole; 200 - support seat; 210 - second mounting hole; 220 - second hinge end face; 230 - spectacle groove; 300 - cover plate; 310 - first mounting hole; 320 - first hinge end face; 330 - positioning support surface; 400 - disassembly hole; 500 - first protrusion; 510 - first inclined surface; 600 - second protrusion; 610 - second inclined surface; 700 - third magnetic part; 800 - fourth magnetic part. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0032] The following will be combined with Figures 1 to 21 to detail the technical solutions disclosed in each embodiment of the present invention.

[0033] Referring to Figure 1 and Figure 2 An embodiment of the present invention discloses a plunger type rotating shaft 100, including: a plunger tube 110, a plunger press head 120, a first magnetic part 130 and a second magnetic part 140. The plunger tube 110 provides an installation basis for the plunger press head 120, the first magnetic part 130 and the second magnetic part 140. The plunger press head 120 has a first end restricted in the plunger tube 110 and a second end that can extend out of the plunger tube 110.

[0034] The first magnetic member 130 is disposed on the plunger tube 110, and the second magnetic member 140 is disposed on the plunger head 120. The plunger head 120 is movable relative to the plunger tube 110 under the interaction of the first magnetic member 130 and the second magnetic member 140 so that the second end of the plunger head 120 extends out of the first end of the plunger tube 110. Optionally, the first magnetic member 130 and the second magnetic member 140 interact such that a part of the plunger head 120 can extend out of the plunger tube 110. Optionally, the plunger head 120 can be at least partially within the plunger tube 110. The plunger head 120 is in sliding fit with the plunger tube 110, and the plunger head 120 can slide along the plunger tube 110, so that the plunger head 120 can contract into the plunger tube 110 and can also extend out of the plunger tube 110.

[0035] When the plunger type rotating shaft 100 described in the above embodiment needs to be assembled with two rotating components, the plunger tube 110 can be first installed in the first rotating component, and a force is applied to the plunger head 120 to move the plunger head 120 into the plunger tube 110 to at least partially retract into the plunger tube 110. Then the second rotating component is installed, so that the plunger head 120 is aligned with the mounting hole for rotational fit of the second rotating component. Thus, after the plunger head 120 can extend out of the plunger tube 110 under the action of the first magnetic member 130 and the second magnetic member 140, the plunger head 120 extending out of the plunger tube 110 can enter the mounting hole of the second rotating component. Thereby, the first rotating component and the second rotating component are rotationally fitted.

[0036] Refer to Figure 1 , the first magnetic member 130 can be disposed on a part of the plunger tube 110 away from the first end of the plunger tube 110, the second magnetic member 140 is disposed on the first end of the plunger head 120, the first magnetic member 130 and the second magnetic member 140 are oppositely disposed, and the magnetic poles of the adjacent ends of the first magnetic member 130 and the second magnetic member 140 are the same. In this embodiment, the first magnetic member 130 and the second magnetic member 140 generate a mutually repulsive force, so that the plunger head 120 can move relative to the plunger tube 110 under the interaction of the first magnetic member 130 and the second magnetic member 140 and extend out of the first end of the plunger tube 110. Specifically, the first magnetic member 130 and the second magnetic member 140 can be magnets, electromagnetic coils, etc.

[0037] Refer to Figure 16 and Figure 17, the first magnetic member 130 is disposed on a portion of the plunger tube 110 near the first end of the plunger tube 110, and the second magnetic member 140 is disposed on the first end of the plunger head 120. The magnetic poles of the adjacent ends of the first magnetic member 130 and the second magnetic member 140 are opposite. In this embodiment, the first magnetic member 130 and the second magnetic member 140 generate an attractive force that enables the plunger head 120 to move relative to the plunger tube 110 under the interaction of the first magnetic member 130 and the second magnetic member 140 and extend out of the second end of the plunger tube 110. Optionally, among the first magnetic member 130 and the second magnetic member 140, one can be a magnet or an electromagnetic coil, and the other can be made of a magnetic material, or include a component made of a magnetic material. It should be noted that the magnetic material can be a material with magnetism or a material that can be magnetically adsorbed, such as iron, cobalt, etc. Of course, the first magnetic member 130 and the second magnetic member 140 can also both be magnets. When the first magnetic member 130 and the second magnetic member 140 are both magnets, the magnetic poles of the adjacent ends of the first magnetic member 130 and the second magnetic member 140 are different.

[0038] The second magnetic member 140 can be an integral structure with the plunger head 120 or can be fixed to the plunger head 120 by assembly. There are many ways to assemble the second magnetic member 140 with the plunger head 120. For example, it can be fixed by pasting, inlaying, or screwing. The specific assembly method of the second magnetic member 140 and the plunger head 120 is not limited in this embodiment.

[0039] A first limit boss 111 for restricting the first end of the plunger head 120 can be provided at the first end of the plunger tube 110. The first limit boss 111 forms a first through hole, and the second end of the plunger head 120 can extend out of the plunger tube 110 from the first through hole. The first limit boss 111 can prevent the plunger head 120 from completely extending out of the plunger tube 110, restricting the first end of the plunger head 120 in the plunger tube 110, thereby avoiding the plunger head 120 completely detaching from the plunger tube 110 and also avoiding the length of the plunger head 120 in the plunger tube 110 being too short, which would reduce the strength of the connected part between the plunger tube 110 and the plunger head 120.

[0040] In an alternative embodiment, the plunger head 120 may include a first plunger portion 121 located within the plunger tube 110 and a second plunger portion 122 that can extend out of the plunger tube 110. The first end of the plunger head 120 is the end of the first plunger portion 121, and the second end of the plunger head 120 is the end of the second plunger portion 122. Optionally, the first plunger portion 121 is connected to the second plunger portion 122. The size of the first plunger portion 121 is larger than the size of the first through hole, and the size of the second plunger portion 122 is smaller than the size of the first through hole. The sizes of the first plunger portion 121 and the second plunger portion 122 refer to the radial sizes of the first plunger portion 121 and the second plunger portion 122, such as the radius or diameter. The size of the first through hole refers to the aperture of the first through hole. Optionally, the first plunger portion 121 is in rotational and / or sliding fit with the inner wall of the plunger tube 110. The second plunger portion 122 may be in rotational and / or sliding fit with the inner wall of the first through hole.

[0041] In an alternative embodiment, the second end of the plunger tube 110 is disposed opposite to the first end of the plunger tube 110. The second end of the plunger tube 110 forms a second through hole, and the size of the second through hole is not less than the size of the first plunger portion 121. The size of the second through hole may be the aperture of the second through hole. The size of the first plunger portion 121 may be the radial size of the first plunger portion 121, such as the radius or diameter of the first plunger portion 121. In this embodiment, since the size of the second through hole is not less than the size of the first plunger portion 121, the plunger head 120 can be inserted into the plunger tube 110 from the second through hole, facilitating the assembly of the plunger head 120 and the plunger tube 110.

[0042] Referring to Figure 1 and Figure 2 , the plunger type rotating shaft 100 further includes a plunger base 112. The plunger base 112 is located at the second end of the plunger tube 110, and the second end of the plunger tube 110 is disposed opposite to the first end of the plunger tube 110. The plunger base 112 can be used to prevent the plunger head 120 from falling off from the second end of the plunger tube 110. In an alternative embodiment, the first magnetic member 130 may be fixedly disposed on the plunger base 112.

[0043] In an alternative embodiment, the plunger base 112 includes a first seat body 112a and a second seat body 112b. The second seat body 112b is coaxially connected to the first seat body 112a, and the second seat body 112b is disposed within the plunger tube 110. Referring to Figure 1 and Figure 2 , the second seat body 112b may be embedded within the plunger tube 110 to improve the stability of the connection between the plunger base 112 and the plunger tube 110. The second seat body 112b may be fixedly connected to the plunger tube 110 by threads to facilitate the installation and disassembly of the plunger base 112.

[0044] Referring to Figure 1 ,Figure 2 and Figure 16 ,the plunger tube 110 may further include an exhaust hole 150 which communicates the internal space and the external space of the plunger tube 110. During the movement of the plunger head 120 within the plunger tube 110, the exhaust hole 150 can be used to exhaust the gas inside the plunger tube 110, or suck the gas outside the plunger tube 110 into the plunger tube 110 through the exhaust hole 150, so as to balance the air pressure inside and outside the plunger tube 110, thereby reducing the moving resistance of the plunger head 120.

[0045] Referring to Figure 1 ,in an alternative embodiment, the exhaust hole 150 may be provided on the tube wall of the plunger tube 110. For example, the exhaust hole 150 may be provided in the middle of the plunger tube 110. During the movement of the plunger head 120 within the plunger tube 110, the gas inside the plunger tube 110 is exhausted through the exhaust hole 150.

[0046] In an alternative embodiment, exhaust holes 150 are provided at both ends of the plunger tube 110. Referring to Figure 16 ,the first plunger portion 121 divides the space inside the plunger tube 110 into a first moving space and a second moving space. The first exhaust hole 151 at the first end of the plunger tube 110 communicates the first moving space and the external space of the plunger tube 110, so that the air pressure inside the first moving space is balanced with the external air pressure of the plunger tube 110. The second exhaust hole 152 at the second end of the plunger tube 110 communicates the second moving space and the external space of the plunger tube 110, so that the air pressure in the second moving space is balanced with the external air pressure of the plunger tube 110. The air pressure in the first moving space is balanced with the air pressure in the second moving space, thereby reducing the resistance received during the movement of the plunger tube 110.

[0047] Referring to Figure 17 ,the first plunger portion 121 divides the space inside the plunger tube 110 into a first moving space and a second moving space, and the first moving space and the second moving space can be communicated through the exhaust hole 150 to balance the pressure between the first moving space and the second moving space, thereby reducing the moving resistance of the plunger head 120.

[0048] Based on the plunger type rotating shaft 100 described above, an embodiment of the present invention also discloses a glasses fixing jig. The glasses fixing jig includes the plunger type rotating shaft 100 described in any of the above embodiments. Optionally, the glasses fixing jig further includes a support seat 200 and a cover plate 300, and the support seat 200 and the cover plate 300 are rotatably connected through the plunger type rotating shaft 100 to facilitate the installation and disassembly of the cover plate 300 and the support seat 200.

[0049] Referring to Figures 3 to 6, one of the cover plate 300 and the support base 200 is provided with a first mounting hole 310, and the other is provided with a second mounting hole 210. For example, the cover plate 300 is provided with a first mounting hole 310, and the support base 200 is provided with a second mounting hole 210. The first mounting hole 310 can match the profile of the plunger tube 110, and the plunger tube 110 can be at least partially disposed in the first mounting hole 310. The second mounting hole 210 can match the profile of the plunger head 120, and the plunger head 120 can be at least partially disposed in the second mounting hole 210.

[0050] Reference Figure 14 The glasses fixing fixture also includes a disassembly hole 400, and the disassembly hole 400 is connected to the second mounting hole 210. For example, the disassembly hole 400 can be set in the support seat 200. In the process of disassembling the cover plate 300 and the support seat 200, a tool can be passed through the disassembly hole 400 and act on the plunger head 120 located in the second mounting hole 210, so that the plunger head 120 is contracted in the plunger tube 110, and the plunger head 120 is removed from the second mounting hole 210. The disassembly hole 400 can be in the shape of a long strip, and during the disassembly action, the plunger head 120 can be squeezed along the disassembly hole 400. Optionally, the disassembly hole 400 can be a notch set on the second mounting hole 210, the width of the notch is smaller than the diameter of the second mounting hole 210, and the notch is set along the moving direction of the plunger head 120 in the second mounting hole 210.

[0051] In one example, the cover plate 300 is provided with a first hinged end surface 320, and the support seat 200 includes a second hinged end surface 220, and the second hinged end surface 220 is arranged opposite to the first hinged end surface 320. A first protrusion 500 is provided on the first hinged end surface 320, and a second protrusion 600 is provided on the second hinged end surface 220. The first protrusion 500 rotates with the cover plate 300 relative to the support seat 200, and the second protrusion 600 switches with the first protrusion 500 between the first state and the second state. When the second protrusion 600 and the first protrusion 500 are in the first state, the second protrusion 600 is separated from the first protrusion 500, and the angle between the cover plate 300 and the support seat 200 is the first angle. When the second protrusion 600 and the first protrusion 500 are in the second state, the second protrusion 600 and the first protrusion 500 are in contact and sliding cooperation, and the angle between the cover plate 300 and the support seat 200 is the second angle. The first angle is greater than the second angle.

[0052] In the above embodiments, the resistance of the cover plate 300 rotating relative to the support base 200 can be increased by the action of the first protrusion 500 and the second protrusion 600. When the second protrusion 600 and the first protrusion 500 are in the first state, the cover plate 300 is farther away from the support base 200, and the first protrusion 500 and the second protrusion 600 are separated from each other. At this time, the resistance of the cover plate 300 rotating relative to the support base 200 is relatively small, so that it is convenient for the cover plate 300 to rotate rapidly relative to the support base 200. When the second protrusion 600 and the first protrusion 500 are in the second state, the cover plate 300 is closer to the support base 200, and the first protrusion 500 and the second protrusion 600 interact with each other, so that the resistance of the cover plate 300 rotating relative to the support base 200 is increased, and the rotation speed of the cover plate 300 relative to the support base 200 can be reduced, so as to avoid violent collision between the cover plate 300 and the support base 200 when the cover plate 300 covers the support base 200, achieving the purpose of protecting the cover plate 300 and the glasses placed on the support base 200.

[0053] Referring to Figure 21 , the first protrusion 500 protrudes from the first hinge end face 320, a first inclined surface 510 is arranged on the first protrusion 500, the first inclined surface 510 is smoothly connected with the first hinge end face 320, and the second protrusion 600 slides and switches along the first inclined surface 510 on the surfaces of the first hinge end face 320 and the first protrusion 500. Or, the second protrusion 600 protrudes from the second hinge end face 220, a second inclined surface 610 is arranged on the second protrusion 600, the second inclined surface 610 is smoothly connected with the second hinge end face 220, and the first protrusion 500 slides and switches along the second inclined surface 610 on the surfaces of the second hinge end face 220 and the second protrusion 600. The first included angle can be from 0° to 45°.

[0054] In the above embodiments, by arranging the first inclined surface 510 on the first protrusion 500 or the second inclined surface 610 on the second protrusion 600, violent collision between the first protrusion 500 and the second protrusion 600 can be avoided, thereby protecting the first protrusion 500 and the second protrusion 600. The first inclined surface 510 or the second inclined surface 610 makes the resistance between the cover plate 300 and the support base 200 increase gradually, so that the rotation of the cover plate 300 relative to the support base 200 is more stable.

[0055] Referring to Figures 12 to 15 , the glasses fixing jig further includes a third magnetic member 700 and a fourth magnetic member 800. The third magnetic member 700 is arranged on the cover plate 300, the fourth magnetic member 800 is arranged on the support base 200, and the third magnetic member 700 and the fourth magnetic member 800 are magnetically coupled. The third magnetic member 700 and the fourth magnetic member 800 attract each other, so that the cover plate 300 and the support base 200 can be kept covered, the cover plate 300 can be prevented from being opened, and the stability of the glasses fixing jig for fixing the glasses is improved.

[0056] Reference Figure 12 and Figure 13 On the support base 200, there is a spectacle groove 230 for positioning and placing the spectacle to be processed. The cover plate 300 includes a positioning support surface 330, on which a protective pad is provided. When the cover plate 300 is covered with the support base 200, the protective pad supports the spectacle in the spectacle groove 230. Providing the protective pad on the positioning support surface 330 can effectively protect the spectacle on the support base 200 and prevent the spectacle on the support base 200 from having a rigid collision with the cover plate 300. The protective pad can be made of a soft and / or elastic material to utilize the deformation of the protective pad itself to play a buffering role, thereby achieving the purpose of protecting the spectacle on the support base 200. There are many types of flexible and / or elastic materials, such as sponge, foam, rubber, etc. The present invention does not limit the specific material of the protective pad.

[0057] In the above embodiments of the present invention, the differences between the various embodiments are mainly described. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. For the sake of brevity of the description, they will not be elaborated here.

[0058] The above description is only for the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A plunger-type rotating shaft for installation in a rotating component, the plunger-type rotating shaft comprising: A plunger tube, a plunger head, a first magnetic member, and a second magnetic member; the plunger head has a first end restricted within the plunger tube and a second end extendable out of the plunger tube, the first magnetic member is disposed on the plunger tube, the second magnetic member is disposed on the plunger head, and the plunger head is movable relative to the plunger tube under the interaction of the first magnetic member and the second magnetic member so that the second end of the plunger head extends out of the first end of the plunger tube; The plunger tube or the plunger head is used to align with the mounting hole of another rotating member; Wherein, the two rotating members are respectively provided with a first hinged end face and a second hinged end face opposite to the first hinged end face, the first hinged end face and the second hinged end face are respectively provided with a first protrusion and a second protrusion, and the first protrusion and the second protrusion are used to increase the resistance of the two rotating members to rotate relative to each other.

2. The plunger-type rotating shaft according to claim 1, wherein, The first magnetic member is disposed on a portion of the plunger tube away from the first end of the plunger tube, the second magnetic member is disposed on the first end of the plunger head, the first magnetic member and the second magnetic member are disposed opposite to each other, and the magnetic poles of the adjacent ends of the first magnetic member and the second magnetic member are the same; Or, the first magnetic member is disposed on a portion of the plunger tube near the first end of the plunger tube, the second magnetic member is disposed on the first end of the plunger head, and the magnetic poles of the adjacent ends of the first magnetic member and the second magnetic member are opposite.

3. The plunger-type rotating shaft according to claim 1, wherein, A first limiting boss for restricting the first end of the plunger head is provided at the first end of the plunger tube, the first limiting boss forms a first through hole, and the second end of the plunger head can extend out of the plunger tube through the first through hole.

4. The plunger-type rotating shaft according to claim 3, wherein, The plunger head includes a first plunger portion located within the plunger tube and a second plunger portion extendable out of the plunger tube, the first end of the plunger head is the end of the first plunger portion, the second end of the plunger head is the end of the second plunger portion, the size of the first plunger portion is larger than the size of the first through hole, and the size of the second plunger portion is smaller than the size of the first through hole.

5. The plunger-type rotating shaft according to claim 4, wherein, The second end of the plunger tube is disposed opposite to the first end of the plunger tube, the second end of the plunger tube forms a second through hole, and the size of the second through hole is not less than the size of the first plunger portion.

6. The plunger-type rotating shaft according to claim 1, wherein, The plunger type rotating shaft further includes a plunger base, the plunger base is located at the second end of the plunger tube, and the second end of the plunger tube is disposed opposite to the first end of the plunger tube.

7. The plunger-type rotating shaft according to claim 6, wherein, The plunger base includes a first seat body and a second seat body, the second seat body is coaxially connected to the first seat body, and the second seat body is disposed within the plunger tube.

8. The plunger-type rotating shaft according to any one of claims 1 to 7, wherein, The plunger tube further includes an exhaust hole, and the exhaust hole communicates the internal space and the external space of the plunger tube.

9. An eyeglass fixing jig, comprising the plunger-type rotating shaft according to any one of claims 1 to 8, further comprising a support seat and a cover plate, the support seat and the cover plate being rotatably connected by the plunger-type rotating shaft.

10. The eyeglass fixing jig according to claim 9, wherein, Among the cover plate and the support seat, one is provided with a first mounting hole, the other is provided with a second mounting hole, the first mounting hole is matched with the contour of the plunger tube, and at least a part of the plunger tube is disposed within the first mounting hole; the second mounting hole is matched with the contour of the plunger head, and at least a part of the plunger head is disposed within the second mounting hole.

11. The eyeglass fixing jig according to claim 10, wherein, It further includes a disassembly hole, and the disassembly hole communicates with the second mounting hole.

12. The eyeglass fixing jig according to claim 11, wherein, A first hinged end face is provided on the cover plate, and the support seat includes a second hinged end face, and the second hinged end face is disposed opposite to the first hinged end face. A first protrusion is provided on the first hinged end face, and a second protrusion is provided on the second hinged end face. The first protrusion rotates relative to the support seat along with the cover plate, and the second protrusion and the first protrusion are switched between a first state and a second state. When the second protrusion and the first protrusion are in the first state, the second protrusion and the first protrusion are separated, and the included angle between the cover plate and the support seat is a first included angle. When the second protrusion and the first protrusion are in the second state, the second protrusion abuts against and slidably cooperates with the first protrusion, and the included angle between the cover plate and the support seat is a second included angle. The first included angle is greater than the second included angle.

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